/**
 * Estilos visuales de TRIVIAX
 * Diseño Premium Dark con Glassmorphism y Acentos Vibrantes HSL
 */

/* VARIABLES DE DISEÑO */
@font-face {
    font-family: 'Outfit';
    src: local('Outfit'), local('Outfit Regular');
    font-weight: 300 800;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "Luckiest Guy Local";
    src: url("../fonts/LuckiestGuy-Regular.ttf") format("truetype");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

:root {
    --bg-dark: #090d16;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-card-hover: rgba(30, 41, 59, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(99, 102, 241, 0.15);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Acentos */
    --accent: #6366f1; /* Indigo */
    --accent-glow: rgba(99, 102, 241, 0.4);
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --success: #10b981; /* Emerald */
    --success-gradient: linear-gradient(135deg, #059669 0%, #10b981 100%);
    --danger: #ef4444;  /* Red */
    --danger-gradient: linear-gradient(135deg, #dc2626 0%, #f87171 100%);
    --warning: #f59e0b; /* Amber */
    
    /* Fuentes */
    --font-main: 'Outfit', 'Trebuchet MS', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-brand: "Luckiest Guy Local", "Arial Black", Impact, system-ui, sans-serif;
    --triviax-version-accent: #fff56d;
    --triviax-x-color: #fcd360;
    --triviax-brand-outline: #ffffff;
    --triviax-brand-outline-deep: #252160;
}

/* RESET GENERAL */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-dark);
    background-image: url('../images/masterground.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-main);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

/* CONTENEDOR SPA */
#app-container {
    width: 100%;
    height: 100%;
    position: relative;
}

/* PANTALLAS DE JUEGO (SPA) */
.game-screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 10;
}

.game-screen.active {
    display: flex;
    opacity: 1;
    z-index: 20;
}

/* CARDS GLASSMORPHISM */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 
                inset 0 1px 1px rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
}

/* BOTONES */
.btn {
    font-family: var(--font-main);
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.6);
}

.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-outline-danger {
    background: transparent;
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #f87171;
}

.btn-outline-danger:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.8);
    color: #ef4444;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1rem;
    width: 100%;
}

/* ── Botón Panel Docente (pantalla inicio) ── */
.btn-panel-docente {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 18px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, transform 0.15s, box-shadow 0.2s;
    width: 100%;
}

.btn-panel-docente:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.55);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.2);
}

.btn-panel-docente:active {
    transform: translateY(0);
}

.btn-panel-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    line-height: 1;
}

.btn-panel-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex: 1;
    gap: 2px;
}

.btn-panel-text strong {
    font-size: 0.95rem;
    font-weight: 700;
    color: #c4b5fd;
    line-height: 1.2;
}

.btn-panel-text small {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
}

.btn-panel-arrow {
    font-size: 1.4rem;
    color: rgba(99, 102, 241, 0.5);
    flex-shrink: 0;
    line-height: 1;
    transition: color 0.2s, transform 0.2s;
}

.btn-panel-docente:hover .btn-panel-arrow {
    color: #a5b4fc;
    transform: translateX(3px);
}

/* ── Fila de accesos secundarios en portada (⚙️ Panel + 📖 Guía) ── */
.cover-secondary-row {
    display: flex;
    gap: 10px;
}

.btn-icon-pill {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    text-decoration: none;
    transition: background 0.2s, border-color 0.2s, transform 0.15s;
    cursor: pointer;
}

button.btn-icon-pill {
    font-family: var(--font-main);
}

.btn-icon-pill:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(255, 255, 255, 0.22);
    transform: translateY(-1px);
}

.btn-icon-pill__icon {
    font-size: 1.25rem;
    line-height: 1;
    user-select: none;
}

.btn-tab {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    padding: 10px 20px;
    text-transform: none;
}

.btn-tab.active {
    background: rgba(99, 102, 241, 0.15);
    border-color: var(--accent);
    color: var(--text-primary);
}

.attempt-type {
    margin-top: 4px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 700;
}

/* ========================================================
   PANTALLA 1: SELECCIÓN DE PROYECTO
   ======================================================== */
#screen-project-select {
    align-items: stretch;
    justify-content: flex-start;
    padding: 0;
    background: transparent;
}

.main-menu-card {
    width: 100%;
    max-width: 460px;
    padding: 36px 40px;
}

/* ========================================================
   HOMEPAGE — LAYOUT ESCRITORIO DOS COLUMNAS
   ======================================================== */

/* Contenedor flex full-size */
.cover-layout {
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 100%;
}

/* LEFT: Panel hero / imagen de portada */
.cover-brand-panel {
    flex: 0 0 50%;
    width: 50%;
    height: 100%;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 50px;
    gap: 40px;
    text-align: center;

    /*
     * El masterground.jpg viene del body (background-attachment: fixed).
     * Este panel actúa como overlay semitransparente encima de él.
     * Ajustar la opacidad de los colores para más/menos visibilidad del fondo.
     */
    background:
        radial-gradient(ellipse at 22% 35%, rgba(99, 102, 241, 0.22) 0%, transparent 55%),
        radial-gradient(ellipse at 80% 68%, rgba(168, 85, 247, 0.16) 0%, transparent 50%),
        linear-gradient(148deg, rgba(5, 7, 20, 0.78), rgba(9, 6, 25, 0.74));
    border-right: 1px solid rgba(255, 255, 255, 0.07);
}

/* Texto fantasma "TX" decorativo en fondo */
.cover-brand-panel::before {
    content: 'TX';
    position: absolute;
    font-family: var(--font-main);
    font-size: 54vw;
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 1px rgba(99, 102, 241, 0.06);
    text-stroke: 1px rgba(99, 102, 241, 0.06);
    letter-spacing: -15px;
    top: 50%;
    left: 50%;
    transform: translate(-44%, -50%);
    pointer-events: none;
    user-select: none;
    white-space: nowrap;
    z-index: 0;
}

/* Brillo decorativo en esquina superior izquierda */
.cover-brand-panel::after {
    content: '';
    position: absolute;
    top: -100px;
    left: -100px;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.18) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* Todo el contenido del panel izquierdo por encima de los decorativos */
.cover-brand-content,
.hero-art {
    position: relative;
    z-index: 1;
}

/* Version pill */
.version-pill {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: rgba(165, 180, 252, 0.9);
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.28);
    padding: 5px 14px;
    border-radius: 20px;
    margin-bottom: 14px;
}

/* Logo grande en panel izquierdo */
.cover-brand-panel .logo-text {
    font-size: clamp(3.6rem, 5.5vw, 6.8rem);
    line-height: 1;
}

.cover-brand-panel .subtitle-text {
    font-size: 0.95rem;
    letter-spacing: 3px;
    margin-top: 6px;
}

/* Ocultar brand-mark legacy */
.brand-mark { display: none; }

/* Arte decorativo: mini tablero + fichas */
.hero-art {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
}

.hero-mini-board {
    display: grid;
    grid-template-columns: repeat(6, 44px);
    gap: 9px;
}

.hero-cell {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    border: 1.5px solid rgba(255, 255, 255, 0.09);
    background: rgba(255, 255, 255, 0.03);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.25);
}

.hero-cell--start {
    border-color: rgba(99, 102, 241, 0.5);
    background: rgba(99, 102, 241, 0.13);
    color: rgba(165, 180, 252, 0.9);
    box-shadow: 0 0 14px rgba(99, 102, 241, 0.25);
}

.hero-cell--accent {
    border-color: rgba(168, 85, 247, 0.32);
    background: rgba(168, 85, 247, 0.08);
}

.hero-cell--goal {
    border-color: rgba(16, 185, 129, 0.55);
    background: rgba(16, 185, 129, 0.12);
    color: rgba(52, 211, 153, 0.92);
    box-shadow: 0 0 14px rgba(16, 185, 129, 0.25);
    font-size: 0.75rem;
}

/* Fichas de jugadores */
.hero-pieces {
    display: flex;
    gap: 16px;
    align-items: center;
}

.hero-piece {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.22);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.5);
    flex-shrink: 0;
}

/* RIGHT: Panel del formulario */
.cover-form-side {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 40px;
    overflow-y: auto;
    overflow-x: hidden;
}

/* ======================================================== */

.menu-header {
    text-align: center;
    margin-bottom: 30px;
}

.logo-text {
    font-size: 3.5rem;
}

.subtitle-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: -5px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

select {
    background: rgba(251, 191, 36, 0.13);   /* amber pastel — contraste sobre fondo oscuro */
    border: 1px solid rgba(251, 191, 36, 0.28);
    padding: 12px 16px;
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    outline: none;
    cursor: pointer;
    max-width: 100%;    /* evita desbordamiento horizontal */
    transition: all 0.3s;
}

select option {
    background: #1a1200;   /* fondo oscuro con tono cálido para las opciones */
    color: #f8fafc;
}

select:focus {
    border-color: rgba(251, 191, 36, 0.6);
    box-shadow: 0 0 10px rgba(251, 191, 36, 0.2);
}

/* Detalles del proyecto */
.details-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
    animation: fadeIn 0.4s ease;
}

.details-box h2 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 8px;
}

.meta-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.meta-list li strong {
    color: var(--text-primary);
}

.obs-box {
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: rgba(99, 102, 241, 0.05);
    padding: 10px;
    border-radius: 6px;
    border-left: 3px solid var(--accent);
}

.obs-box p {
    margin-top: 4px;
    font-style: italic;
}

.hidden {
    display: none !important;
}

/* Home breve */
.home-intro {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 26px;
}

.home-intro p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.55;
}

.home-objectives {
    display: grid;
    gap: 10px;
    list-style: none;
}

.home-objectives li {
    position: relative;
    padding: 11px 12px 11px 36px;
    background: rgba(255, 255, 255, 0.035);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.92rem;
    line-height: 1.35;
}

.home-objectives li::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 16px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #34d399;
    box-shadow: 0 0 12px rgba(52, 211, 153, 0.5);
}

.compat-project-select {
    display: none !important;
}

/* ========================================================
   PANTALLA 2: MANUALES Y GUÍAS
   ======================================================== */
#screen-manuals {
    overflow-y: auto;
    align-items: flex-start;
    justify-content: center;
    padding: 22px;
    background: transparent;
}

.manuals-shell {
    width: min(1180px, 100%);
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: auto;
}

.manuals-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.manual-card {
    min-height: 260px;
    padding: 22px;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 13px;
}

.manual-card__tag {
    border-radius: 999px;
    padding: 5px 10px;
    background: rgba(99, 102, 241, 0.18);
    color: #c4b5fd;
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.manual-card h3 {
    font-size: 1.25rem;
    line-height: 1.15;
}

.manual-card p {
    color: var(--text-secondary);
    line-height: 1.45;
    flex: 1;
}

.manual-card .btn {
    width: 100%;
    margin-top: auto;
    text-decoration: none;
}

.manual-card--soon {
    opacity: 0.72;
}

.manual-card--soon .manual-card__tag {
    background: rgba(251, 191, 36, 0.13);
    color: #fbbf24;
}

/* ========================================================
   PANTALLA 3: CATÁLOGO DE ACTIVIDADES
   ======================================================== */
#screen-activity-catalog {
    overflow-y: auto;
    align-items: flex-start;
    justify-content: center;
    padding: 22px;
    background: transparent;
}

.catalog-shell {
    width: min(1420px, 100%);
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: auto;
}

.catalog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 24px 28px;
    border-radius: 18px;
}

.catalog-header h2 {
    font-size: clamp(1.9rem, 3vw, 3rem);
    line-height: 1.05;
    margin: 4px 0 6px;
}

.catalog-subtitle {
    color: var(--text-secondary);
    line-height: 1.4;
}

.catalog-layout {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr) 330px;
    gap: 16px;
    align-items: start;
}

.catalog-sidebar,
.catalog-preview,
.catalog-search-card {
    padding: 18px;
    border-radius: 16px;
}

.catalog-sidebar,
.catalog-preview {
    position: sticky;
    top: 18px;
}

.catalog-sidebar h3,
.catalog-section-header h3 {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
}

.category-list {
    display: flex;
    flex-direction: column;
    gap: 9px;
    margin-top: 14px;
}

.category-chip {
    width: 100%;
    min-height: 42px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.035);
    color: var(--text-secondary);
    font-family: var(--font-main);
    font-weight: 700;
    cursor: pointer;
    text-align: left;
    padding: 10px 12px;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.category-chip:hover,
.category-chip.active {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.5);
}

.catalog-main {
    display: flex;
    flex-direction: column;
    gap: 18px;
    min-width: 0;
}

.catalog-search-card {
    display: grid;
    gap: 8px;
}

.catalog-search-card label {
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.search-input-wrapper {
    display: flex;
    gap: 8px;
    align-items: center;
    width: 100%;
}

.catalog-search-card input {
    flex: 1;
    width: 100%;
    min-height: 46px;
    border: 1px solid rgba(52, 211, 153, 0.24);
    border-radius: 12px;
    background: rgba(4, 120, 87, 0.13);
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    padding: 12px 14px;
    outline: none;
}

.btn-search-icon {
    background: rgba(52, 211, 153, 0.15);
    border: 1px solid rgba(52, 211, 153, 0.3);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1.1rem;
    min-width: 46px;
    min-height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
}

.btn-search-icon:hover {
    background: rgba(52, 211, 153, 0.3);
    border-color: rgba(52, 211, 153, 0.6);
    transform: scale(1.05);
}

.btn-search-icon:active {
    transform: scale(0.95);
}

.catalog-search-card input:focus {
    border-color: rgba(52, 211, 153, 0.62);
    box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.12);
}

.catalog-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.catalog-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.catalog-count {
    min-width: 32px;
    min-height: 26px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(251, 191, 36, 0.14);
    color: #fbbf24;
    font-size: 0.82rem;
    font-weight: 800;
}

.activity-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 12px;
}

.activity-cards-grid--featured {
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.activity-card {
    min-height: 152px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    background:
        linear-gradient(150deg, rgba(15, 23, 42, 0.86), rgba(30, 41, 59, 0.72)),
        radial-gradient(circle at top left, rgba(99, 102, 241, 0.16), transparent 48%);
    color: var(--text-primary);
    padding: 15px;
    font-family: var(--font-main);
    cursor: pointer;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 9px;
    transition: transform 0.2s, border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.activity-card:hover,
.activity-card.selected {
    transform: translateY(-2px);
    border-color: rgba(52, 211, 153, 0.58);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.28), 0 0 0 1px rgba(52, 211, 153, 0.12);
}

.activity-card.selected {
    background:
        linear-gradient(150deg, rgba(6, 78, 59, 0.72), rgba(30, 41, 59, 0.78)),
        radial-gradient(circle at top left, rgba(52, 211, 153, 0.24), transparent 52%);
}

.activity-card--featured {
    min-height: 166px;
}

.activity-card__level,
.activity-card__plays {
    width: fit-content;
    max-width: 100%;
    border-radius: 999px;
    padding: 4px 9px;
    font-size: 0.72rem;
    font-weight: 800;
}

.activity-card__level {
    background: rgba(99, 102, 241, 0.18);
    color: #c4b5fd;
}

.activity-card__plays {
    background: rgba(251, 191, 36, 0.13);
    color: #fbbf24;
}

.activity-card strong {
    font-size: 1.02rem;
    line-height: 1.18;
    overflow-wrap: anywhere;
}

.activity-card__meta {
    color: var(--text-secondary);
    font-size: 0.84rem;
    line-height: 1.25;
    overflow-wrap: anywhere;
}

.catalog-preview {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.catalog-preview .details-box {
    margin-bottom: 0;
}

.catalog-no-selection,
.catalog-empty-state {
    color: var(--text-secondary);
    line-height: 1.45;
    background: rgba(255, 255, 255, 0.035);
    border: 1px dashed rgba(255, 255, 255, 0.13);
    border-radius: 14px;
    padding: 18px;
}

/* ========================================================
   PANTALLA 2: CONFIGURACIÓN DE JUGADORES
   ======================================================== */

/*
 * Patrón flex + scroll correcto para pantallas SPA con overflow:hidden en body.
 * align-items:flex-start + margin:auto en el hijo centra cuando hay espacio
 * y habilita scroll cuando la tarjeta supera el viewport.
 */
#screen-players-setup {
    overflow-y: auto;
    align-items: flex-start;
    justify-content: center;
    background: transparent;
    padding: 20px 12px;
}

.setup-card {
    width: 860px;
    max-width: calc(100vw - 24px);
    padding: 36px 40px;
    margin: auto;       /* centra verticalmente cuando hay espacio libre */
}

.setup-card h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

/* ── Grid de dos columnas (landscape / tablets / desktop) ── */
.setup-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    align-items: start;
    margin-bottom: 20px;
}

/* Encabezado de sección dentro de cada columna */
.setup-col-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin: 0 0 14px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

/* ── Columna Jugadores ────────────────────────────────── */
.player-count-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.player-count-selector .btn {
    flex: 1 1 96px;
}

.players-inputs-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 0;
}

.player-input-row {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 8px 16px;
    border-radius: 10px;
    transition: all 0.3s;
}

.player-input-row:focus-within {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.15);
}

.color-badge {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

.player-name-input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    width: 100%;
}

/* ── Columna Configuración ───────────────────────────── */
.game-mode-config {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
}

.game-mode-config label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 10px;
}

.game-mode-config label:first-child {
    margin-top: 0;
}

.form-hint {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin: 2px 0 4px;
    line-height: 1.35;
}

/* ── Botones de acción (fila completa al pie) ────────── */
.action-buttons-row {
    display: flex;
    gap: 16px;
}

.action-buttons-row .btn {
    flex: 1;
}

/* ── Columna única en pantallas angostas (≤ 680 px) ─── */
@media (max-width: 680px), (orientation: landscape) and (max-height: 500px) {
    #screen-manuals {
        padding: 12px;
    }

    .manuals-grid {
        grid-template-columns: 1fr;
    }

    .manual-card {
        min-height: 0;
    }

    #screen-activity-catalog {
        padding: 12px;
        padding-bottom: 90px !important;
    }

    .catalog-header {
        flex-direction: column;
        align-items: stretch;
        padding: 18px;
    }

    .catalog-header-actions .btn {
        width: 100%;
    }

    .catalog-layout {
        grid-template-columns: 1fr;
    }

    .catalog-sidebar {
        position: static;
    }

    .catalog-preview {
        position: fixed !important;
        top: auto !important;   /* anula el `top:18px` de la regla base; sin esto el panel se estira de arriba a abajo y tapa las tarjetas */
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        display: flex !important;
        flex-direction: row !important;
        justify-content: space-between !important;
        align-items: center !important;
        border-radius: 16px 16px 0 0 !important;
        background: rgba(26, 11, 46, 0.95) !important;
        border: 1px solid rgba(255, 255, 255, 0.15) !important;
        border-bottom: none !important;
        padding: 12px 18px !important;
        gap: 12px !important;
        box-shadow: 0 -10px 30px rgba(0,0,0,0.5) !important;
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        margin: 0 !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .catalog-preview .eyebrow-text,
    .catalog-preview .meta-list,
    .catalog-preview .obs-box {
        display: none !important;
    }

    .catalog-preview .catalog-no-selection {
        padding: 6px 12px !important;
        font-size: 0.85rem !important;
        border: none !important;
        background: transparent !important;
        margin: 0 !important;
        text-align: left !important;
    }

    .catalog-preview .details-box {
        display: flex !important;
        flex-direction: column !important;
        align-items: flex-start !important;
        margin: 0 !important;
        padding: 0 !important;
        text-align: left !important;
        overflow: hidden;
    }

    .catalog-preview #detail-title {
        font-size: 1.05rem !important;
        margin: 0 !important;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 180px;
    }

    .catalog-preview #btn-go-to-setup {
        margin-top: 0 !important;
        width: auto !important;
        padding: 8px 20px !important;
        font-size: 0.95rem !important;
        flex-shrink: 0 !important;
    }

    .category-list {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 4px;
    }

    .category-chip {
        width: auto;
        min-width: max-content;
        white-space: nowrap;
    }

    .activity-cards-grid,
    .activity-cards-grid--featured {
        grid-template-columns: 1fr;
    }

    .setup-columns {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .setup-col-label {
        display: none;          /* sin encabezados de sección en móvil */
    }
    .players-inputs-container {
        margin-bottom: 24px;    /* restaura separación original en columna única */
    }
    .game-mode-config {
        margin-bottom: 20px;
    }
}

/* Teléfono en horizontal: la barra inferior ya garantiza que CONTINUAR sea
   alcanzable; aquí solo aprovechamos el ancho extra mostrando las tarjetas
   en dos columnas en vez de una. */
@media (orientation: landscape) and (max-height: 500px) {
    .activity-cards-grid,
    .activity-cards-grid--featured {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 681px) and (max-width: 1024px) {
    .manuals-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* ========================================================
   PANTALLA 3: TABLERO DE JUEGO
   ======================================================== */
.board-screen-layout {
    display: flex;
    flex-direction: row;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

.board-viewport {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: transparent;
    overflow: hidden;
}

.board-container {
    position: relative;
    width: 100%;
    height: 100%;
    /* Truco matemático para autoajuste horizontal y vertical en proporción 16:9 */
    max-width: calc((100vh - 40px) * 16 / 9);
    max-height: calc((100vw - 360px - 40px) * 9 / 16); 
    aspect-ratio: 16 / 9;
    background-color: #0c0f17;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    overflow: hidden;
    /* Configuración de container query para fuentes adaptativas */
    container-type: inline-size;
    container-name: board;
}

/* Capas del tablero */
.board-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 1.0; /* Mostrar los tableros con la claridad y luminosidad original */
    z-index: 1;
}

.board-svg-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.board-path-line {
    fill: none;
    stroke: rgba(99, 102, 241, 0.25);
    stroke-width: 6;
    stroke-linecap: round;
    stroke-linejoin: round;
    /* Efecto neon dash */
    stroke-dasharray: 8 6;
    animation: dashPath 30s linear infinite;
}

.board-spaces-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
}

.board-tokens-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 4;
    pointer-events: none;
}

/* Casillas */
.board-space {
    position: absolute;
    width: 5.2%;  /* Adaptado porcentual ligeramente más grande para mayor presencia visual */
    height: 9.2%;
    transform: translate(-50%, -50%);
    border: 2.5px solid rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    backdrop-filter: none; /* Sin blur para ver el tablero con total claridad */
    -webkit-backdrop-filter: none;
    transition: all 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Colores vibrantes tipo Oca / Ciudad Convivencia con opacidad del 20% para transparencia máxima y claridad del tablero */
.board-space:nth-child(7n+1) {
    background: rgba(239, 68, 68, 0.2); /* Rojo */
    box-shadow: 0 4px 0 rgba(153, 27, 27, 0.4), 0 6px 10px rgba(0, 0, 0, 0.2);
}
.board-space:nth-child(7n+2) {
    background: rgba(249, 115, 22, 0.2); /* Naranja */
    box-shadow: 0 4px 0 rgba(154, 52, 18, 0.4), 0 6px 10px rgba(0, 0, 0, 0.2);
}
.board-space:nth-child(7n+3) {
    background: rgba(253, 224, 71, 0.2); /* Amarillo */
    box-shadow: 0 4px 0 rgba(161, 98, 7, 0.4), 0 6px 10px rgba(0, 0, 0, 0.2);
}
.board-space:nth-child(7n+3) .space-number {
    color: #ffffff !important; /* Texto blanco para mejor contraste en amarillo translúcido */
}
.board-space:nth-child(7n+4) {
    background: rgba(34, 197, 94, 0.2); /* Verde */
    box-shadow: 0 4px 0 rgba(22, 101, 52, 0.4), 0 6px 10px rgba(0, 0, 0, 0.2);
}
.board-space:nth-child(7n+5) {
    background: rgba(6, 182, 212, 0.2); /* Celeste / Cyan */
    box-shadow: 0 4px 0 rgba(21, 94, 117, 0.4), 0 6px 10px rgba(0, 0, 0, 0.2);
}
.board-space:nth-child(7n+6) {
    background: rgba(168, 85, 247, 0.2); /* Violeta / Púrpura */
    box-shadow: 0 4px 0 rgba(107, 33, 168, 0.4), 0 6px 10px rgba(0, 0, 0, 0.2);
}
.board-space:nth-child(7n) {
    background: rgba(236, 72, 153, 0.2); /* Rosa / Magenta */
    box-shadow: 0 4px 0 rgba(157, 23, 77, 0.4), 0 6px 10px rgba(0, 0, 0, 0.2);
}

.board-space:hover {
    transform: translate(-50%, -58%) scale(1.1) !important;
    border-color: #ffffff !important;
    box-shadow: 0 8px 0 rgba(0, 0, 0, 0.25), 0 12px 24px rgba(0, 0, 0, 0.5) !important;
    cursor: pointer;
    z-index: 10;
}

.space-number {
    font-size: max(11px, 2cqw);
    font-weight: 800;
    color: var(--text-primary);
    text-shadow: 0 1.5px 2px rgba(0, 0, 0, 0.6);
}

.space-label {
    font-size: max(7px, 1.3cqw);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-shadow: 0 1.5px 2px rgba(0, 0, 0, 0.6);
}

/* Casillas Especiales */
.board-space.space-start {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.4) 0%, rgba(29, 78, 216, 0.4) 100%) !important;
    border-color: #ffffff !important;
    border-width: 3px !important;
    width: 6.2%;
    height: 11%;
    border-radius: 16px !important;
    box-shadow: 0 5px 0 rgba(23, 37, 84, 0.4), 0 8px 16px rgba(0, 0, 0, 0.35) !important;
}

.board-space.space-start .space-label {
    color: #ffffff !important;
    font-size: max(8px, 1.4cqw);
    font-weight: 800;
}

.board-space.space-meta {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.4) 0%, rgba(4, 120, 87, 0.4) 100%) !important;
    border-color: #ffffff !important;
    border-width: 3px !important;
    width: 6.2%;
    height: 11%;
    border-radius: 16px !important;
    box-shadow: 0 5px 0 rgba(6, 78, 59, 0.4), 0 8px 16px rgba(0, 0, 0, 0.35) !important;
}

.board-space.space-meta .space-label {
    color: #ffffff !important;
    font-size: max(7.5px, 1.3cqw);
    font-weight: 800;
    margin-bottom: -2px;
}

.board-space.space-meta .space-number {
    color: #ffffff !important;
    font-size: max(12px, 2.2cqw);
    font-weight: 800;
}

/* Fichas de Jugadores */
.player-token {
    position: absolute;
    width: 2.8%;
    height: 5%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 2px solid #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: max(8px, 1.4cqw);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.6), 
                inset 0 1px 2px rgba(255,255,255,0.3);
    z-index: 10;
    transition: left 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                top 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* PANEL LATERAL DE CONTROL (SIDEBAR) */
.sidebar-panel {
    width: 360px;
    background: rgba(10, 14, 26, 0.82);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    padding: 24px;
    z-index: 15;
    overflow-y: auto;
}

.project-info-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.project-info-header h3 {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 8px;
}

.badge-level {
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid var(--accent);
    color: #a5b4fc;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 800;
}

.leaderboard-section {
    margin-bottom: 24px;
}

.leaderboard-section h4, 
.game-logs-section h4 {
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.players-status-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.player-status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    padding: 10px 14px;
    border-radius: 10px;
    transition: all 0.3s;
}

.player-status-row.active-turn {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.08);
}

.player-status-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.player-status-color {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.player-status-name {
    font-size: 0.95rem;
    font-weight: 600;
}

.player-status-penalties {
    font-size: 0.75rem;
    background: #ef4444;
    border: 1px solid #ef4444;
    color: #ffffff;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    margin-left: 8px;
    flex-shrink: 0;
    box-sizing: border-box;
}

.player-status-right {
    text-align: right;
}

.player-status-pos {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.player-status-score {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-primary);
}

/* Control de Turno e Indicador */
.turn-dice-section {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 14px;
    padding: 18px;
    margin-bottom: 24px;
}

.current-turn-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 16px;
}

.turn-label {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.player-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.player-badge-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.player-badge-name {
    font-weight: 800;
    font-size: 1rem;
}

/* DADO INTERACTIVO */
.dice-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.dice-wrapper {
    perspective: 600px;
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
}

.dice-wrapper:hover {
    transform: rotateX(-15deg) rotateY(18deg) scale(1.08);
}

.dice-element {
    --dice-size: 60px;
    --dice-translate: 30px;
    width: var(--dice-size);
    height: var(--dice-size);
    position: relative;
    transform-style: preserve-3d;
    transition: transform 1.4s cubic-bezier(0.19, 1, 0.22, 1);
    cursor: pointer;
}

.dice-face {
    position: absolute;
    width: var(--dice-size);
    height: var(--dice-size);
    background: radial-gradient(circle at 30% 30%, #ffffff 0%, #e2e8f0 70%, #cbd5e1 100%);
    border: 1.5px solid #cbd5e1;
    border-radius: 12px;
    box-shadow: inset 0 2px 3px rgba(255, 255, 255, 0.85),
                inset 0 -2px 5px rgba(0, 0, 0, 0.15),
                0 4px 10px rgba(0, 0, 0, 0.3);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    padding: 6px;
    gap: 1px;
    box-sizing: border-box;
    backface-visibility: visible;
}

.dice-face.face-1 { transform: rotateY(0deg) translateZ(var(--dice-translate)); }
.dice-face.face-2 { transform: rotateY(180deg) translateZ(var(--dice-translate)); }
.dice-face.face-3 { transform: rotateY(90deg) translateZ(var(--dice-translate)); }
.dice-face.face-4 { transform: rotateY(-90deg) translateZ(var(--dice-translate)); }
.dice-face.face-5 { transform: rotateX(90deg) translateZ(var(--dice-translate)); }
.dice-face.face-6 { transform: rotateX(-90deg) translateZ(var(--dice-translate)); }

.dice-grid-cell {
    display: flex;
    align-items: center;
    justify-content: center;
}

.dice-dot {
    width: 8px;
    height: 8px;
    background-color: #1e293b;
    border-radius: 50%;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.6);
}

/* Botón Tirar */
.btn-roll {
    width: 100%;
}

/* Registro de eventos */
.logs-container {
    height: 100px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 10px;
    padding: 10px 14px;
    overflow-y: auto;
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.log-entry {
    line-height: 1.3;
}

.system-log {
    color: var(--text-muted);
}

.roll-log {
    color: #a5b4fc;
}

.correct-log {
    color: #34d399;
}

.incorrect-log {
    color: #f87171;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.sidebar-footer .btn {
    width: 100%;
}

/* ========================================================
   MODAL DE TRIVIA / PREGUNTAS
   ======================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(5, 7, 12, 0.85);
    backdrop-filter: blur(10px);
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    padding: 18px;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-content-card {
    width: 650px;
    max-width: 90%;
    max-height: calc(100vh - 36px);
    padding: 36px;
    position: relative;
    overflow-y: auto;
    overflow-x: hidden;
    transform: translateY(20px);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-content-card {
    transform: translateY(0);
}

/* Temporizador */
.timer-bar-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.05);
}

.timer-bar-fill {
    height: 100%;
    width: 100%;
    background: var(--accent-gradient);
    transition: width 1s linear;
}

.modal-header {
    margin-bottom: 24px;
}

.question-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.question-number-badge {
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: #a5b4fc;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 800;
}

.timer-text {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--warning);
    background: rgba(245, 158, 11, 0.1);
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.question-text {
    font-size: 1.4rem;
    font-weight: 800;
    line-height: 1.35;
    color: var(--text-primary);
}

.options-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

/* 2×2 grid: se usa en verdadero/falso y opción múltiple de 4 opciones */
.options-grid--2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

/* En pantallas muy estrechas, volver a columna única */
@media (max-width: 420px) {
    .options-grid--2col {
        grid-template-columns: 1fr;
    }
}

/* Opciones de respuesta */
.option-btn {
    width: 100%;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 16px 20px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    line-height: 1.3;
}

/* En grilla de 2 columnas, centrar el texto de los botones */
.options-grid--2col .option-btn {
    text-align: center;
}

.option-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateX(4px);
}

/* En 2col el hover no desplaza horizontalmente */
.options-grid--2col .option-btn:hover:not(:disabled) {
    transform: translateY(-2px);
}

.option-btn:disabled {
    cursor: not-allowed;
}

/* Estados de Opciones seleccionadas (retroalimentación) */
.option-btn.opt-correct {
    background: rgba(16, 185, 129, 0.12) !important;
    border-color: #10b981 !important;
    color: #34d399 !important;
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.2);
}

.option-btn.opt-incorrect {
    background: rgba(239, 68, 68, 0.12) !important;
    border-color: #ef4444 !important;
    color: #f87171 !important;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.2);
}

/* Panel de feedback inferior */
.feedback-panel {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    animation: slideUp 0.3s ease;
}

.feedback-message {
    font-size: 1.1rem;
    font-weight: 800;
}

.feedback-message.txt-success {
    color: #34d399;
}

.feedback-message.txt-danger {
    color: #f87171;
}

/* ========================================================
   PANTALLA 4: JUEGO TERMINADO
   ======================================================== */
#screen-game-over {
    align-items: center;
    justify-content: center;
    overflow-y: auto;
    padding: 20px;
    background: transparent;
}

.game-over-card {
    width: 600px;
    max-width: 95%;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
    overflow-x: hidden;
    padding: 40px;
    text-align: center;
}

.trophy-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    filter: drop-shadow(0 0 20px rgba(245, 158, 11, 0.5));
    animation: bounceTrophy 2s infinite ease-in-out;
}

.congrats-text {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-secondary);
}

.winner-highlight {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #ffd43b 0%, #f59e0b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 4px 10px rgba(245, 158, 11, 0.3));
}

.congrats-subtext {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 30px;
}

.stats-container {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 14px;
    padding: 24px;
    margin-bottom: 30px;
    overflow-x: auto;
}

.stats-container h3 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.stats-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.stats-table th, 
.stats-table td {
    padding: 10px 12px;
    text-align: left;
}

.stats-table th {
    border-bottom: 1px solid rgba(255,255,255,0.08);
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-muted);
}

.stats-table td {
    border-bottom: 1px solid rgba(255,255,255,0.04);
    font-size: 0.95rem;
}

.session-trivia-stats {
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 14px;
}

.game-over-actions {
    display: flex;
    gap: 16px;
}

.game-over-actions .btn {
    flex: 1;
}

/* ========================================================
   PANTALLA 5: ERROR
   ======================================================== */
#screen-error {
    align-items: center;
    justify-content: center;
    background: transparent;
}

.error-card {
    width: 450px;
    max-width: 90%;
    padding: 40px;
    text-align: center;
    border-color: rgba(239, 68, 68, 0.2);
}

.error-icon {
    font-size: 3.5rem;
    color: #ef4444;
    margin-bottom: 16px;
    filter: drop-shadow(0 0 10px rgba(239, 68, 68, 0.3));
}

.error-card h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.error-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ========================================================
   ANIMACIONES (KEYFRAMES)
   ======================================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes dashPath {
    from { stroke-dashoffset: 500; }
    to { stroke-dashoffset: 0; }
}

@keyframes spinDice {
    0% { transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg) scale(0.9); }
    33% { transform: rotateX(120deg) rotateY(180deg) rotateZ(90deg) scale(1.1); }
    66% { transform: rotateX(240deg) rotateY(90deg) rotateZ(180deg) scale(0.9); }
    100% { transform: rotateX(360deg) rotateY(360deg) rotateZ(360deg) scale(1); }
}

@keyframes bounceTrophy {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* RESPONSIVIDAD GENERAL ADICIONAL */
@media (max-width: 1024px) and (orientation: portrait) {
    .board-screen-layout {
        flex-direction: column;
    }
    .board-viewport {
        height: 60vh;
        width: 100vw;
    }
    .board-container {
        max-width: calc((60vh - 20px) * 16 / 9);
        max-height: calc(100vw - 20px);
    }
    .board-container.board-portrait {
        aspect-ratio: 9 / 16;
        max-width: calc((60vh - 20px) * 9 / 16);
        max-height: calc((100vw - 20px) * 16 / 9);
    }
    .sidebar-panel {
        width: 100vw;
        height: 40vh;
        border-left: none;
        border-top: 1px solid var(--border-color);
        flex-direction: row;
        gap: 20px;
    }
    .project-info-header, .sidebar-footer {
        display: none;
    }
    .leaderboard-section, .turn-dice-section, .game-logs-section {
        flex: 1;
        margin-bottom: 0;
    }
    .logs-container {
        height: 100%;
    }
    
    /* Configuración para el tablero vertical en modo retrato */
    .board-container.board-portrait .board-space {
        width: 10.5%;
        height: 6.0%;
    }
    .board-container.board-portrait .space-start {
        width: 12.5%;
        height: 7.2%;
    }
    .board-container.board-portrait .space-meta {
        width: 12.5%;
        height: 7.2%;
    }
    .board-container.board-portrait .player-token {
        width: 6.2%;
        height: 3.5%;
    }
}

/* Optimización específica para smartphones y pantallas muy pequeñas (vertical) */
@media (max-width: 768px) and (orientation: portrait) {
    .board-viewport {
        height: 52vh !important;
        padding: 10px !important;
    }
    
    .board-container {
        max-width: calc((52vh - 20px) * 16 / 9) !important;
        max-height: calc(100vw - 20px) !important;
    }
    
    .board-container.board-portrait {
        max-width: calc((52vh - 20px) * 9 / 16) !important;
        max-height: calc((100vw - 20px) * 16 / 9) !important;
    }

    .sidebar-panel {
        display: grid !important;
        grid-template-columns: 1.2fr 1fr;
        grid-template-rows: auto auto;
        gap: 8px !important;
        width: 100vw !important;
        height: 48vh !important;
        padding: 10px !important;
        overflow-y: auto !important;
        flex-direction: unset !important;
    }
    
    .leaderboard-section {
        grid-column: 1 / 2;
        grid-row: 1 / 2;
        margin-bottom: 0 !important;
        flex: unset !important;
    }
    
    .leaderboard-section h4, .game-logs-section h4 {
        font-size: 0.7rem !important;
        margin-bottom: 6px !important;
        letter-spacing: 0.5px !important;
    }
    
    .players-status-list {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: wrap !important;
        gap: 4px !important;
    }
    
    .player-status-row {
        flex: 1;
        min-width: 78px !important;
        padding: 4px 6px !important;
        flex-direction: column !important;
        align-items: center;
        text-align: center;
        gap: 2px !important;
        border-radius: 8px !important;
    }
    
    .player-status-row .btn-edit-name {
        display: none !important;
    }
    
    .player-status-left {
        flex-direction: row !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 3px !important;
    }
    
    .player-status-right {
        text-align: center !important;
    }
    
    .player-status-name {
        font-size: 0.75rem !important;
        max-width: 48px !important;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    
    .player-status-score {
        font-size: 0.8rem !important;
    }
    
    .player-status-pos {
        font-size: 0.6rem !important;
    }

    .player-status-penalties {
        margin-left: 0 !important;
    }
    
    .turn-dice-section {
        grid-column: 2 / 3;
        grid-row: 1 / 2;
        margin-bottom: 0 !important;
        flex: unset !important;
        display: flex;
        flex-direction: row !important;
        align-items: center;
        justify-content: space-around;
        padding: 8px !important;
        border-radius: 10px !important;
    }
    
    .current-turn-indicator {
        margin-bottom: 0 !important;
        align-items: center !important;
    }
    
    .turn-label {
        font-size: 0.6rem !important;
        margin-bottom: 2px !important;
    }
    
    .player-badge {
        padding: 4px 8px !important;
    }
    
    .player-badge-name {
        font-size: 0.8rem !important;
    }
    
    .dice-area {
        flex-direction: row !important;
        gap: 8px !important;
        align-items: center;
    }
    
    .dice-element {
        --dice-size: 42px !important;
        --dice-translate: 21px !important;
        width: var(--dice-size) !important;
        height: var(--dice-size) !important;
    }
    
    .dice-face {
        width: var(--dice-size) !important;
        height: var(--dice-size) !important;
        padding: 3px !important;
        border-radius: 8px !important;
    }
    
    .dice-dot {
        width: 5px !important;
        height: 5px !important;
    }
    
    .btn-roll {
        padding: 6px 10px !important;
        font-size: 0.7rem !important;
    }
    
    .game-logs-section {
        grid-column: 1 / 3;
        grid-row: 2 / 3;
        width: 100% !important;
        height: auto !important;
        flex: unset !important;
        margin-bottom: 0 !important;
    }
    
    .game-logs-section h4 {
        display: none !important;
    }
    
    .logs-container {
        height: 42px !important;
        padding: 6px 10px !important;
        font-size: 0.72rem !important;
    }
}

/* RESPONSIVIDAD EN ORIENTACIÓN HORIZONTAL (LANDSCAPE) */
@media (max-width: 1024px) and (orientation: landscape) {
    .board-screen-layout {
        flex-direction: row !important;
    }
    .board-viewport {
        height: 100vh !important;
        flex: 1 !important;
        padding: 12px !important;
    }
    .sidebar-panel {
        width: 300px !important;
        height: 100vh !important;
        padding: 12px !important;
        overflow-y: auto !important;
        flex-direction: column !important;
        display: flex !important;
        grid-template-columns: none !important;
        grid-template-rows: none !important;
    }
}
@media (max-width: 768px) and (orientation: landscape) {
    .sidebar-panel {
        width: 240px !important;
        padding: 8px !important;
    }
}
@media (max-height: 480px) and (orientation: landscape) {
    .game-logs-section, .project-info-header, .sidebar-footer {
        display: none !important;
    }
    .leaderboard-section {
        margin-bottom: 8px !important;
    }
    .dice-area {
        gap: 4px !important;
    }
    .dice-element {
        --dice-size: 36px !important;
        --dice-translate: 18px !important;
    }
    .btn-roll {
        padding: 6px 8px !important;
        font-size: 0.75rem !important;
    }
}

/* Ajustes adaptativos para diálogos modal y pantallas iniciales */
@media (max-width: 600px) {
    /* En móvil la tarjeta llena el viewport, no hace falta padding en el screen */
    #screen-players-setup {
        padding: 0 !important;
        overflow-y: unset !important;
    }

    .setup-card, .game-over-card {
        width: 100vw !important;
        height: 100vh !important;
        max-height: 100vh !important;
        max-width: 100vw !important;
        border-radius: 0 !important;
        overflow-y: auto !important;
        margin: 0 !important;
    }

    .main-menu-card, .setup-card, .game-over-card {
        padding: 20px 16px !important;
    }
    
    .player-count-selector {
        gap: 4px !important;
    }
    
    .player-count-selector .btn {
        padding: 8px 4px !important;
        font-size: 0.75rem !important;
        letter-spacing: 0px !important;
    }
    
    .logo-text {
        font-size: 2.2rem !important;
    }
    
    .subtitle-text {
        font-size: 0.85rem !important;
    }
    
    .setup-card h2 {
        font-size: 1.5rem !important;
    }
    
    .action-buttons-row {
        flex-direction: column;
        gap: 8px;
    }
    
    .action-buttons-row .btn {
        width: 100%;
    }
    
    .modal-content-card {
        padding: 20px 16px !important;
        max-height: 92vh !important;
        overflow-y: auto !important;
    }
    
    .question-text {
        font-size: 1.1rem !important;
    }
    
    .option-btn {
        padding: 12px 14px !important;
        font-size: 0.85rem !important;
    }
    
    .winner-highlight {
        font-size: 2rem !important;
    }
    
    .congrats-text {
        font-size: 1.3rem !important;
    }
    
    .stats-table th, .stats-table td {
        padding: 6px 4px !important;
        font-size: 0.75rem !important;
    }
    
    .game-over-actions {
        flex-direction: column;
        gap: 8px;
    }
}

/* Estilos para entrada de número del temporizador */
input[type="number"] {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 12px 16px;
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s;
}

input[type="number"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.25);
}

/* Animación y estado crítico del temporizador */
.timer-text.timer-warning {
    color: #ff4b4b !important;
    background: rgba(239, 68, 68, 0.15) !important;
    border-color: rgba(239, 68, 68, 0.4) !important;
    animation: flashRed 0.5s infinite alternate !important;
}

@keyframes flashRed {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    100% {
        opacity: 0.8;
        transform: scale(1.06);
    }
}

/* ========================================================
   REPORTE DETALLADO Y ESTADO DE CORREO EN GAME OVER
   ======================================================== */
.detailed-report-section {
    margin-top: 24px;
    text-align: left;
}

.detailed-report-section h4 {
    font-size: 0.9rem;
    margin-bottom: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detailed-attempts-list {
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 12px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Personalizar barra de desplazamiento */
.detailed-attempts-list::-webkit-scrollbar {
    width: 6px;
}
.detailed-attempts-list::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}
.detailed-attempts-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}
.detailed-attempts-list::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

.attempt-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 8px;
}

.attempt-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.attempt-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
    font-size: 0.8rem;
    flex-wrap: wrap;
}

.attempt-num {
    font-weight: 800;
    color: var(--text-muted);
}

.attempt-player {
    color: var(--text-secondary);
    font-weight: 600;
}

.attempt-badge {
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 800;
    font-size: 0.7rem;
    text-transform: uppercase;
}

.attempt-correct {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.attempt-incorrect {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.attempt-timeout {
    background: rgba(245, 158, 11, 0.15);
    color: #ffd43b;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.attempt-question {
    font-size: 0.9rem;
    line-height: 1.3;
    color: var(--text-primary);
}

/* Caja de Estado del Envío por Mail */
.email-status-box {
    margin-top: 15px;
    font-size: 0.85rem;
    padding: 12px;
    border-radius: 10px;
    font-weight: 600;
    text-align: center;
}

.email-sending {
    background: rgba(99, 102, 241, 0.1);
    color: #a5b4fc;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.email-success {
    background: rgba(16, 185, 129, 0.12);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.email-error {
    background: rgba(239, 68, 68, 0.12);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.email-disabled {
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Estilos para el lápiz de edición de nombre en el marcador lateral */
.btn-edit-name {
    transition: opacity 0.2s, transform 0.2s;
}

.btn-edit-name:hover {
    opacity: 1 !important;
    transform: scale(1.1);
}

/* Estilos para el reporte detallado del modal (estadisticas.php) */
.modal-attempts-scrollable {
    max-height: 250px;
    overflow-y: auto;
    padding-right: 5px;
}
.modal-attempts-scrollable::-webkit-scrollbar {
    width: 6px;
}
.modal-attempts-scrollable::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}
.modal-attempts-scrollable::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}
.modal-attempts-scrollable::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

.modal-attempt-card {
    margin-bottom: 12px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

/* ========================================================
   DASHBOARD DE ESTADÍSTICAS (estadisticas.php)
   ======================================================== */
.stats-layout {
    display: flex;
    flex-direction: column;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    overflow: hidden;
}

.stats-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 50;
}

.stats-navbar .logo-area {
    display: flex;
    flex-direction: column;
}

.stats-navbar .logo-area h1 {
    font-size: 1.6rem;
    font-weight: 800;
    margin: 0;
    background: linear-gradient(135deg, #a5b4fc 0%, #6366f1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stats-navbar .logo-area span {
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.stats-body-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.stats-sidebar {
    width: 320px;
    background: rgba(15, 23, 42, 0.4);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
}

.stats-sidebar h2 {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.activity-item-link {
    text-decoration: none;
    color: inherit;
}

.activity-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    padding: 14px 18px;
    border-radius: 12px;
    transition: all 0.25s ease;
    cursor: pointer;
}

.activity-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.activity-item.active {
    background: rgba(99, 102, 241, 0.08);
    border-color: var(--accent);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.08);
}

.activity-item .activity-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.activity-item .activity-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.stats-main-content {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 28px;
    background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.04) 0%, transparent 40%),
                var(--bg-dark);
}

.no-activity-selected {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    font-size: 1.2rem;
    gap: 12px;
}

.no-activity-selected .icon {
    font-size: 3rem;
}

.activity-details-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.activity-details-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.activity-details-header .meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.activity-details-header .meta-row span strong {
    color: var(--text-primary);
}

.stats-metrics-row {
    display: flex;
    gap: 20px;
}

.stats-metric-card {
    flex: 1;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.stats-metric-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent);
}

.stats-metric-card.correct-card::after {
    background: var(--success);
}

.stats-metric-card.incorrect-card::after {
    background: var(--danger);
}

.stats-metric-card .card-label {
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stats-metric-card .card-value {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.stats-table-section {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
}

.stats-table-section h3 {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stats-data-table {
    width: 100%;
    border-collapse: collapse;
}

.stats-data-table th,
.stats-data-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.stats-data-table th {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--text-muted);
    text-transform: uppercase;
}

.stats-data-table td {
    font-size: 0.95rem;
    line-height: 1.4;
}

.stats-data-table tr:hover td {
    background: rgba(255, 255, 255, 0.01);
}

.stats-progress-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.stats-progress-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
    min-width: 100px;
}

.stats-progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.stats-progress-percent {
    font-weight: 800;
    font-size: 0.9rem;
    min-width: 45px;
    text-align: right;
}

.txt-success-badge {
    color: #34d399;
}

.txt-warning-badge {
    color: #ffd43b;
}

.txt-danger-badge {
    color: #f87171;
}

.success-high {
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
}

.success-mid {
    background: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
}

.success-low {
    background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
}

.danger-action-row {
    margin-top: 20px;
    display: flex;
    justify-content: flex-end;
}

/* ========================================================
   OPTIMIZACIÓN WAP / PWA / MOBILE APP
   ======================================================== */

/* Barra de acciones flotante para móviles (Reiniciar/Salir) */
.mobile-action-bar {
    display: none;
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 50;
    gap: 8px;
}

.mobile-action-btn {
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1.5px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.35);
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    user-select: none;
}

.mobile-action-btn:hover {
    background: rgba(30, 41, 59, 0.9);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.mobile-action-btn:active {
    transform: translateY(1px);
}

/* Wrapper responsivo para tablas de estadísticas */
.stats-table-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 20px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(0, 0, 0, 0.15);
}

/* Estilo PWA Bottom Sheet para modales de preguntas y respuestas en móviles */
@media (max-width: 600px) and (orientation: portrait) {
    .modal-overlay {
        align-items: flex-end; /* Alinear abajo en móviles */
    }

    .modal-content-card {
        width: 100% !important;
        max-width: 100% !important;
        border-radius: 24px 24px 0 0 !important;
        transform: translateY(100%);
        transition: transform 0.4s cubic-bezier(0.1, 0.76, 0.55, 0.94);
        padding: 24px 20px 32px 20px !important;
        box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.6);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-bottom: none;
    }
    
    .modal-overlay.active .modal-content-card {
        transform: translateY(0);
    }

    /* Grab bar / indicador de arrastre superior típico de app nativa móvil */
    .modal-content-card::before {
        content: '';
        display: block;
        width: 44px;
        height: 5px;
        background: rgba(255, 255, 255, 0.2);
        border-radius: 3px;
        margin: -10px auto 20px auto;
    }
}

@media (max-width: 1024px) {
    .mobile-action-bar {
        display: flex;
    }
}

/* ========================================================
   ESTILOS DE IMPRESIÓN (PDF)
   ======================================================== */
@media print {
    /* 1. Redefinir variables de CSS para que todo use el esquema de impresión claro de alta legibilidad */
    :root {
        --bg-dark: #ffffff !important;
        --bg-card: #ffffff !important;
        --text-primary: #000000 !important;
        --text-secondary: #333333 !important;
        --text-muted: #666666 !important;
        --border-color: #dddddd !important;
        --accent: #4f46e5 !important;
        --accent-gradient: none !important;
        --success: #059669 !important;
        --success-gradient: none !important;
        --danger: #d97706 !important;
        --danger-gradient: none !important;
    }

    /* 2. Forzar dimensiones de página A4 con orientación vertical y márgenes estándar */
    @page {
        size: A4 portrait;
        margin: 15mm 15mm 15mm 15mm;
    }

    /* 3. Resetear para impresión física o a PDF a nivel global */
    html, body {
        background: #ffffff !important;
        color: #000000 !important;
        font-family: 'Outfit', sans-serif !important;
        font-size: 10pt !important;
        overflow: visible !important;
        width: auto !important;
        height: auto !important;
        position: static !important;
    }

    /* Ocultar elementos interactivos, de navegación, la barra lateral y botones */
    .stats-navbar,
    .stats-sidebar,
    .danger-action-row,
    .btn-refresh-report,
    .btn-print-report,
    .activity-item-link,
    .btn-secondary,
    .btn-outline-danger,
    .reports-grid .btn,
    .btn-print-modal,
    button,
    a[href*="delete_report"],
    #modal-report-details button {
        display: none !important;
    }

    /* 4. Forzar que el contenedor principal ocupe todo el ancho y no se trunque */
    .stats-layout {
        display: block !important;
        width: 100% !important;
        height: auto !important;
        background: #ffffff !important;
        overflow: visible !important;
        position: static !important;
    }

    .stats-body-container {
        display: block !important;
        height: auto !important;
        overflow: visible !important;
        width: 100% !important;
        position: static !important;
    }

    .stats-main-content {
        display: block !important;
        padding: 0 !important;
        background: #ffffff !important;
        color: #000000 !important;
        overflow: visible !important;
        height: auto !important;
        width: 100% !important;
        position: static !important;
    }

    /* Encabezado del reporte */
    .activity-details-header {
        border-bottom: 2px solid #000000 !important;
        margin-bottom: 20px !important;
        padding-bottom: 10px !important;
        display: block !important;
    }

    .activity-details-header h2 {
        color: #000000 !important;
        font-size: 18pt !important;
        margin-bottom: 5px !important;
        font-weight: 800 !important;
    }

    .activity-details-header .meta-row {
        color: #333333 !important;
        font-size: 9pt !important;
        display: flex !important;
        flex-wrap: wrap !important;
        gap: 15px !important;
    }

    .activity-details-header .meta-row span strong {
        color: #000000 !important;
    }

    /* Fila de Tarjetas de Métricas */
    .stats-metrics-row {
        display: flex !important;
        gap: 15px !important;
        margin-bottom: 25px !important;
        width: 100% !important;
    }

    .stats-metric-card {
        background: #f8fafc !important;
        border: 1px solid #cbd5e1 !important;
        border-radius: 8px !important;
        padding: 15px !important;
        flex: 1 !important;
        box-shadow: none !important;
        page-break-inside: avoid !important;
        break-inside: avoid !important;
    }

    .stats-metric-card::after {
        display: none !important;
    }

    .stats-metric-card .card-label {
        color: #64748b !important;
        font-size: 8pt !important;
    }

    .stats-metric-card .card-value {
        color: #0f172a !important;
        font-size: 16pt !important;
        font-weight: 800 !important;
    }

    /* Tablas y Secciones de datos */
    .stats-table-section {
        background: transparent !important;
        border: none !important;
        padding: 0 !important;
        margin-bottom: 30px !important;
        page-break-inside: auto !important;
        break-inside: auto !important;
    }

    .stats-table-section h3 {
        color: #0f172a !important;
        font-size: 12pt !important;
        border-bottom: 1px solid #cbd5e1 !important;
        padding-bottom: 8px !important;
        margin-bottom: 15px !important;
        font-weight: 800 !important;
    }

    .stats-data-table {
        width: 100% !important;
        border-collapse: collapse !important;
    }

    .stats-data-table th {
        background-color: #f1f5f9 !important;
        color: #475569 !important;
        border-bottom: 2px solid #cbd5e1 !important;
        font-size: 8pt !important;
        padding: 8px 10px !important;
        font-weight: 800 !important;
    }

    .stats-data-table td {
        border-bottom: 1px solid #e2e8f0 !important;
        color: #0f172a !important;
        font-size: 8.5pt !important;
        padding: 8px 10px !important;
    }

    /* Barras de progreso */
    .stats-progress-bar {
        background: #e2e8f0 !important;
        border: 1px solid #cbd5e1 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .stats-progress-fill {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .success-high {
        background: #10b981 !important;
    }

    .success-mid {
        background: #f59e0b !important;
    }

    .success-low {
        background: #ef4444 !important;
    }

    .stats-progress-percent {
        font-weight: 800 !important;
        font-size: 8.5pt !important;
    }

    .txt-success-badge { color: #059669 !important; }
    .txt-warning-badge { color: #d97706 !important; }
    .txt-danger-badge { color: #dc2626 !important; }

    /* Reportes de partidas (Grid a bloque en impresión) */
    .reports-grid {
        display: block !important;
    }

    .reports-grid .glass-card {
        background: #f8fafc !important;
        border: 1px solid #cbd5e1 !important;
        border-radius: 8px !important;
        margin-bottom: 15px !important;
        padding: 15px !important;
        page-break-inside: avoid !important;
        break-inside: avoid !important;
        box-shadow: none !important;
        color: #000000 !important;
    }

    .reports-grid .glass-card ul {
        padding-left: 20px !important;
    }

    /* Evitar saltos de página a mitad de filas de tabla o encabezados */
    .stats-data-table tr {
        page-break-inside: avoid !important;
        break-inside: avoid !important;
    }

    h2, h3, h4 {
        page-break-after: avoid !important;
        break-after: avoid !important;
    }

    /* ========================================================
       IMPRESIÓN DEL MODAL DE DETALLES DE PARTIDA ABIERTO
       ======================================================== */
    body.modal-open {
        overflow: visible !important;
        height: auto !important;
        width: auto !important;
    }

    body.modal-open .stats-layout {
        display: none !important; /* Ocultar el reporte general cuando el modal está abierto */
    }

    body.modal-open #modal-report-details {
        position: static !important;
        display: block !important;
        width: 100% !important;
        height: auto !important;
        background: #ffffff !important;
        z-index: auto !important;
        padding: 0 !important;
        overflow: visible !important;
    }

    body.modal-open #modal-report-details .glass-card {
        background: #ffffff !important;
        border: none !important;
        border-radius: 0 !important;
        box-shadow: none !important;
        width: 100% !important;
        max-width: 100% !important;
        max-height: none !important;
        padding: 0 !important;
        overflow: visible !important;
    }

    body.modal-open #modal-report-details h3 {
        color: #000000 !important;
        font-size: 16pt !important;
        border-bottom: 2px solid #000000 !important;
        padding-bottom: 10px !important;
        margin-bottom: 15px !important;
        background: none !important;
        -webkit-text-fill-color: initial !important;
        font-weight: 800 !important;
    }

    body.modal-open #modal-report-details table {
        width: 100% !important;
        border-collapse: collapse !important;
        margin-bottom: 25px !important;
    }

    body.modal-open #modal-report-details table th {
        background: #f1f5f9 !important;
        border-bottom: 2px solid #cbd5e1 !important;
        padding: 8px 10px !important;
        color: #475569 !important;
        font-weight: 800 !important;
    }

    body.modal-open #modal-report-details table td {
        border-bottom: 1px solid #e2e8f0 !important;
        padding: 8px 10px !important;
        color: #0f172a !important;
    }

    body.modal-open #modal-report-details table tr {
        page-break-inside: avoid !important;
        break-inside: avoid !important;
    }

    /* Detalle de intentos en el modal */
    .modal-attempts-scrollable {
        max-height: none !important;
        overflow: visible !important;
        height: auto !important;
        padding-right: 0 !important;
    }

    .modal-attempt-card {
        background: #f8fafc !important;
        border: 1px solid #cbd5e1 !important;
        border-radius: 6px !important;
        padding: 12px !important;
        margin-bottom: 12px !important;
        page-break-inside: avoid !important;
        break-inside: avoid !important;
    }
}

/* BANNER DE ACTUALIZACIÓN (PWA) */
.sw-update-banner {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--accent);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.35), inset 0 1px 1px rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 12px 20px;
    font-size: 0.9rem;
    color: var(--text-primary);
    animation: slideDown 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.sw-update-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sw-update-icon {
    font-size: 1.2rem;
}

.sw-update-text {
    font-weight: 600;
}

#btn-sw-update {
    padding: 6px 12px;
    font-size: 0.75rem;
    text-transform: none;
}

@keyframes slideDown {
    from {
        top: -100px;
        opacity: 0;
    }
    to {
        top: 20px;
        opacity: 1;
    }
}

/* PANEL DE DIAGNÓSTICO DOCENTE */
.diagnostics-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
    animation: fadeIn 0.4s ease;
}

.diag-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 16px;
}

.diag-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.diag-card .label {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-muted);
}

.diag-card .value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.diag-card.success {
    border-color: rgba(16, 185, 129, 0.35);
    background: rgba(16, 185, 129, 0.02);
}

.diag-card.success .value {
    color: var(--success);
}

.diag-card.error {
    border-color: rgba(239, 68, 68, 0.35);
    background: rgba(239, 68, 68, 0.02);
}

.diag-card.error .value {
    color: var(--danger);
}

.diag-card.warning {
    border-color: rgba(245, 158, 11, 0.35);
    background: rgba(245, 158, 11, 0.02);
}

.diag-card.warning .value {
    color: var(--warning);
}

.diag-details-box {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 20px;
}

.diag-details-box h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 8px;
}

.diag-log-container {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.8rem;
    color: var(--text-secondary);
    max-height: 250px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-right: 10px;
}

.diag-log-row {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px dashed rgba(255,255,255,0.03);
    padding-bottom: 4px;
}

.diag-log-row span:last-child {
    font-weight: 600;
    color: var(--text-primary);
}

.diag-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

/* ========================================================
   ESTILOS RECUPERADOS DE LA VERSIÓN 3.0.4
   ======================================================== */

/* 1. Vista previa de camino en portada */
.cover-path-preview {
    display: grid;
    grid-template-columns: repeat(7, minmax(34px, 1fr));
    gap: 10px;
    max-width: 480px;
    margin-top: 20px;
}

.cover-path-preview span {
    aspect-ratio: 1;
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.74);
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 900;
    box-shadow: 0 6px 16px rgba(0,0,0,0.32);
}

.cover-path-preview span:nth-child(2n) {
    transform: translateY(-12px);
    background: rgba(99, 102, 241, 0.36);
}

.cover-path-preview span:last-child {
    background: rgba(16, 185, 129, 0.42);
}

/* 2. Selector de límite de tiempo (Chips) */
.time-selector-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.time-option {
    flex: 1;
    min-width: 65px;
    position: relative;
    cursor: pointer;
}

.time-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.time-option span {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.25s ease;
    text-align: center;
    user-select: none;
}

.time-option input[type="radio"]:checked + span {
    background: rgba(99, 102, 241, 0.15);
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.25);
}

.time-option input[type="radio"]:hover:not(:disabled) + span {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.time-selector-container.disabled .time-option {
    cursor: not-allowed;
    opacity: 0.4;
    pointer-events: none;
}

/* DRAG & DROP STYLES */
.dragging {
    opacity: 0.45 !important;
    border: 2px dashed var(--accent) !important;
    transform: scale(0.98);
}

.drag-over {
    border-color: var(--accent) !important;
    background: rgba(99, 102, 241, 0.12) !important;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.3) !important;
}

/* Estado "seleccionado con clic" en clasificación drag_drop */
.drag-selected {
    border-color: var(--accent) !important;
    background: rgba(99, 102, 241, 0.18) !important;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

/* Zona de destino activa mientras un elemento está siendo arrastrado o seleccionado */
.drag-drop-zone {
    transition: border-color 0.18s, background 0.18s, box-shadow 0.18s;
}
.drag-drop-zone:focus-within {
    border-color: var(--accent);
}

/* Matching Pairs Layout */
.draggable-card {
    cursor: grab;
    user-select: none;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.draggable-card:active {
    cursor: grabbing;
}

.draggable-card.selected-card {
    border-color: var(--accent) !important;
    background: rgba(99, 102, 241, 0.18) !important;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}

.pair-slot {
    min-height: 48px;
    border: 2px dashed rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    display: flex; 
    align-items: center;
    justify-content: center;
    padding: 6px;
    background: rgba(0, 0, 0, 0.15);
    transition: all 0.25s ease;
}

.pair-slot .placed-card {
    width: 100%;
    margin: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid var(--accent);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 0.9rem;
    font-weight: 600;
}

.pair-slot .placed-card .remove-btn {
    cursor: pointer;
    color: var(--danger);
    font-weight: 800;
    margin-left: 8px;
    font-size: 1.1rem;
    line-height: 1;
    transition: transform 0.2s;
}

.pair-slot .placed-card .remove-btn:hover {
    transform: scale(1.25);
}

/* Sequence Order drag styles */
.sequence-list .player-input-row {
    cursor: grab;
    transition: all 0.2s ease;
}

.sequence-list .player-input-row:active {
    cursor: grabbing;
}

/* SOUND TOGGLE STYLES */
.btn-sound-toggle {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-sound-toggle:hover {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.3);
}

.btn-sound-toggle:active {
    transform: scale(0.95);
}

.btn-sound-toggle.sound-muted {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.35);
    color: rgba(239, 68, 68, 0.85);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.1);
}

.btn-sound-toggle.sound-muted:hover {
    background: rgba(239, 68, 68, 0.25);
    border-color: rgba(239, 68, 68, 0.55);
    color: rgba(239, 68, 68, 1);
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.3);
}

.mobile-action-btn {
    transition: all 0.3s ease;
}

.mobile-action-btn:hover {
    transform: scale(1.15);
    background: rgba(255, 255, 255, 0.2);
}

.mobile-action-btn.sound-muted {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.4);
    color: #f87171;
}

.mobile-action-btn.sound-muted:hover {
    background: rgba(239, 68, 68, 0.3);
}

/* Marca TRIVIAX reutilizable en todos los tamaños existentes */
.logo-text,
.study-brand,
.topbar-logo,
.stats-navbar .logo-area h1,
.auth-logo .logo-text,
.email-logo,
.super-header-brand .logo {
    --brand-outline: var(--triviax-brand-outline);
    --brand-outline-deep: var(--triviax-brand-outline-deep);
    --brand-main-a: #ffffff;
    --brand-main-b: #bff3ff;
    --brand-main-c: #48d6ff;
    --brand-x: var(--triviax-x-color);

    font-family: var(--font-brand) !important;
    font-weight: 400 !important;
    letter-spacing: 0.025em !important;
    text-transform: uppercase;
    background:
        linear-gradient(
            180deg,
            var(--brand-main-a) 0%,
            var(--brand-main-b) 43%,
            var(--brand-main-c) 100%
        ) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    color: transparent !important;
    -webkit-text-fill-color: transparent !important;
    -webkit-text-stroke: 0.035em var(--brand-outline);
    paint-order: stroke fill;
    text-shadow:
        0.025em 0.025em 0 var(--brand-outline-deep),
        0.05em 0.06em 0 rgba(0, 0, 0, 0.28);
    filter:
        drop-shadow(0 0.045em 0 #12103c)
        drop-shadow(0 0.12em 0.22em rgba(0, 0, 0, 0.32)) !important;
}

.triviax-wordmark {
    --brand-outline: var(--triviax-brand-outline);
    --brand-outline-deep: var(--triviax-brand-outline-deep);
    --brand-main-a: #ffffff;
    --brand-main-b: #bff3ff;
    --brand-main-c: #48d6ff;
    --brand-x: var(--triviax-x-color);

    display: inline-flex;
    align-items: baseline;
    font-family: var(--font-brand) !important;
    font-size: 1em;
    font-weight: 400 !important;
    letter-spacing: 0.025em !important;
    line-height: 0.92;
    text-transform: uppercase;
    vertical-align: baseline;
    filter:
        drop-shadow(0 0.045em 0 #12103c)
        drop-shadow(0 0.12em 0.22em rgba(0, 0, 0, 0.32));
}

.triviax-wordmark__main,
.triviax-wordmark__x {
    display: inline-block;
    -webkit-text-stroke: 0.035em var(--brand-outline) !important;
    paint-order: stroke fill;
    text-shadow:
        0.025em 0.025em 0 var(--brand-outline-deep),
        0.05em 0.06em 0 rgba(0, 0, 0, 0.26);
}

.triviax-wordmark__main {
    background:
        linear-gradient(
            180deg,
            var(--brand-main-a) 0%,
            var(--brand-main-b) 43%,
            var(--brand-main-c) 100%
        ) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    color: transparent !important;
    -webkit-text-fill-color: transparent !important;
}

.triviax-wordmark__x {
    margin-left: -0.015em;
    background: none !important;
    color: var(--brand-x) !important;
    -webkit-text-fill-color: var(--brand-x) !important;
}

.logo-text .triviax-wordmark,
.study-brand .triviax-wordmark,
.topbar-logo .triviax-wordmark,
.stats-navbar .logo-area h1 .triviax-wordmark,
.auth-logo .logo-text .triviax-wordmark,
.email-logo .triviax-wordmark,
.super-header-brand .logo .triviax-wordmark {
    filter: none;
}

.version-pill {
    color: #e9fbff;
    border-color: rgba(76, 218, 255, 0.32);
    background: rgba(76, 218, 255, 0.1);
    box-shadow: 0 0 18px rgba(76, 218, 255, 0.14);
}

/* INTRO SPLASH STYLES */
.intro-splash {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(6, 8, 20, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    overflow: hidden;
    animation: splashFadeOut 0.7s ease forwards;
    animation-delay: 3.3s;
}

.intro-splash.is-finished {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.intro-splash-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.18em;
    max-width: 100%;
    text-align: center;
    transform-origin: center center;
    transform: scale(0) rotate(0deg);
    opacity: 0;
    will-change: transform, opacity;
    animation: helice-grow 2.4s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.triviax-brand-splash {
    isolation: isolate;
}

.intro-splash-text,
.triviax-logo {
    --logo-outline: var(--triviax-brand-outline);
    --logo-outline-deep: var(--triviax-brand-outline-deep);
    --logo-main-a: #ffffff;
    --logo-main-b: #bff3ff;
    --logo-main-c: #48d6ff;

    position: relative;
    margin: 0;
    padding: 0.08em 0.14em 0.16em;
    font-family: var(--font-brand);
    /* 90% del lado menor de la pantalla (el experimento usaba 16vmin → 80%). */
    font-size: clamp(2.8rem, 18vmin, 240px);
    font-weight: 400;
    color: transparent;
    -webkit-text-stroke: 0;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.01em;
    letter-spacing: 0;
    line-height: 0.86;
    text-transform: uppercase;
    user-select: none;
    white-space: nowrap;
    filter:
        drop-shadow(0 0.045em 0 #12103c)
        drop-shadow(0 0.095em 0 rgba(0, 0, 0, 0.38));
}

.intro-splash-text span {
    display: inline-block;
}

.triviax-logo__main,
.triviax-logo__x {
    display: inline-block;
    -webkit-text-stroke: 0.052em var(--logo-outline);
    paint-order: stroke fill;
    text-shadow:
        0.026em 0.026em 0 var(--logo-outline-deep),
        0.052em 0.064em 0 rgba(0, 0, 0, 0.33);
}

.triviax-logo__main {
    background: linear-gradient(180deg, var(--logo-main-a) 0%, var(--logo-main-b) 43%, var(--logo-main-c) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
}

.triviax-logo__x {
    margin-left: -0.025em;
    transform: rotate(-3deg) scale(1.08);
    transform-origin: 50% 65%;
    background: none;
    color: var(--triviax-x-color);
    -webkit-text-fill-color: var(--triviax-x-color);
    text-shadow:
        0.026em 0.026em 0 var(--logo-outline-deep),
        0.052em 0.064em 0 rgba(0, 0, 0, 0.33);
}

.triviax-logo__version {
    display: inline-block;
    margin-left: 0.14em;
    transform: translateY(-0.46em) rotate(-5deg);
    font-family: var(--font-brand);
    font-size: 0.27em;
    line-height: 1;
    letter-spacing: 0.015em;
    background: linear-gradient(180deg, var(--logo-main-a) 0%, var(--logo-main-b) 43%, var(--logo-main-c) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
    -webkit-text-stroke: 0.078em var(--logo-outline);
    paint-order: stroke fill;
    text-shadow:
        0.035em 0.052em 0 var(--logo-outline-deep);
}

.triviax-logo::before {
    content: none;
}

.triviax-logo::after {
    content: none;
}

.intro-splash-subtitle,
.triviax-tagline {
    font-family: var(--font-brand);
    font-size: clamp(1.1rem, 4.84vmin, 48pt);
    font-weight: 400;
    color: #e9fbff;
    -webkit-text-stroke: 0.035em rgba(28, 24, 86, 0.82);
    paint-order: stroke fill;
    letter-spacing: 0.025em;
    text-transform: uppercase;
    text-align: center;
    line-height: 1.05;
    text-shadow:
        0 2px 0 rgba(16, 13, 53, 0.88);
}

/* Animaciones del Splash — hélice: crece desde el centro girando lento */
@keyframes helice-grow {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 0;
    }
    12% {
        opacity: 1;
    }
    100% {
        transform: scale(1) rotate(720deg);
        opacity: 1;
    }
}

@keyframes splashFadeOut {
    to {
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
    }
}

/* ========================================================
   Ajuste especifico para smartphone en modo retrato / PWA
   ======================================================== */
@media (max-width: 600px) and (orientation: portrait) {
    html,
    body {
        width: 100%;
        min-width: 0;
        min-height: 100svh;
        overflow-x: hidden;
    }

    body {
        overflow-y: auto;
    }

    *,
    *::before,
    *::after {
        min-width: 0;
    }

    #app-container {
        width: 100%;
        min-height: 100svh;
        height: auto;
        overflow-x: hidden;
    }

    .game-screen {
        width: 100%;
        min-height: 100svh;
        height: auto;
        overflow-x: hidden;
        overflow-y: auto;
    }

    .game-screen.active {
        position: relative;
        top: auto;
        left: auto;
    }

    .intro-splash {
        padding: max(16px, env(safe-area-inset-top)) 12px max(16px, env(safe-area-inset-bottom));
        overflow: hidden;
    }

    .intro-splash-stack {
        width: 100%;
        max-width: 100%;
        gap: 10px;
        overflow: hidden;
    }

    .intro-splash-text {
        max-width: 100%;
        justify-content: center;
        gap: 0;
        font-size: clamp(2.6rem, 20vmin, 5rem) !important;
        letter-spacing: 0 !important;
    }

    .triviax-logo__version {
        margin-left: 0.08em;
        font-size: 0.24em;
        transform: translateY(-0.38em) rotate(-5deg);
    }

    .intro-splash-subtitle {
        width: 100%;
        max-width: 92vw;
        white-space: normal;
        text-align: center;
        font-size: clamp(0.78rem, 4.08vw, 1.2rem) !important;
        line-height: 1.2;
        letter-spacing: 0.03em;
    }

    #screen-project-select.active {
        align-items: stretch;
        justify-content: flex-start;
        padding: 10px;
        overflow-x: hidden;
        overflow-y: auto;
    }

    .cover-layout {
        width: 100%;
        max-width: 100%;
        min-height: auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
        padding: 0;
    }

    .cover-brand-panel,
    .main-menu-card {
        width: 100%;
        max-width: 100%;
        border-radius: 18px;
    }

    .cover-brand-panel {
        flex: none;
        width: 100%;
        height: auto;
        min-height: auto;
        padding: 24px 16px 18px;
        border-right: none;
        gap: 16px;
        background:
            radial-gradient(ellipse at 25% 50%, rgba(99, 102, 241, 0.28) 0%, transparent 55%),
            radial-gradient(ellipse at 75% 20%, rgba(168, 85, 247, 0.18) 0%, transparent 50%),
            linear-gradient(148deg, #06081a 0%, #0b1130 100%);
    }

    .cover-form-side {
        flex: none;
        width: 100%;
        padding: 0;
    }

    .hero-art {
        display: none;
    }

    .cover-brand-content {
        text-align: center;
    }

    .cover-badge {
        width: fit-content;
        max-width: 100%;
        font-size: 0.82rem;
        letter-spacing: 0.08em;
        white-space: normal;
    }

    .logo-text {
        font-size: clamp(2.8rem, 16vw, 4.25rem);
        line-height: 0.95;
        letter-spacing: 0;
    }

    .subtitle-text {
        max-width: 100%;
        font-size: clamp(0.72rem, 3.4vw, 0.95rem);
        letter-spacing: 0.1em;
        white-space: normal;
    }

    .cover-path-preview {
        width: 100%;
        max-width: 100%;
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 8px;
    }

    .cover-path-preview span,
    .cover-path-preview span:nth-child(2n) {
        width: auto;
        min-width: 0;
        height: auto;
        aspect-ratio: 1 / 1;
        transform: none;
        font-size: 0.88rem;
    }

    .main-menu-card {
        padding: 18px !important;
    }

    .menu-eyebrow {
        font-size: clamp(0.82rem, 4vw, 1rem);
        letter-spacing: 0.13em;
    }

    .menu-header h2 {
        font-size: clamp(2rem, 10vw, 3.15rem);
        line-height: 1;
    }

    .form-group label {
        font-size: clamp(0.95rem, 4.5vw, 1.1rem);
    }

    .project-select {
        width: 100%;
        max-width: 100%;
        font-size: clamp(1rem, 4.8vw, 1.25rem);
        padding: 14px 42px 14px 16px;
    }

    .details-box {
        padding: 16px;
        overflow: hidden;
    }

    .details-box h2 {
        font-size: clamp(1.35rem, 7vw, 2.15rem);
        line-height: 1.08;
        overflow-wrap: anywhere;
    }

    .details-box p,
    .details-box blockquote {
        font-size: clamp(0.94rem, 4.4vw, 1.1rem);
        line-height: 1.35;
    }

    .cover-actions {
        display: grid;
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .cover-actions .btn,
    .admin-shortcut,
    .btn-panel-docente {
        width: 100%;
        max-width: 100%;
        white-space: normal;
    }

    .btn-panel-docente {
        padding: 12px 14px;
    }

    .btn-panel-text strong {
        font-size: clamp(0.85rem, 4vw, 0.95rem);
    }

    #screen-game-board.board-screen-layout.active {
        position: relative;
        width: 100%;
        min-height: 100svh;
        height: auto;
        display: flex !important;
        flex-direction: column !important;
        align-items: stretch;
        justify-content: flex-start;
        overflow-x: hidden;
        overflow-y: auto;
        padding: 0 0 max(10px, env(safe-area-inset-bottom));
    }

    #screen-game-board .mobile-action-bar {
        position: absolute;
        top: max(8px, env(safe-area-inset-top));
        right: 8px;
        left: auto;
        width: auto;
        max-width: calc(100vw - 16px);
        display: flex;
        justify-content: flex-end;
        gap: 7px;
        padding: 0;
        z-index: 50;
        pointer-events: none;
    }

    #screen-game-board .mobile-action-btn {
        width: 42px;
        height: 42px;
        min-width: 42px;
        min-height: 42px;
        padding: 0;
        border-radius: 50%;
        font-size: 1rem;
        box-shadow: 0 8px 22px rgba(0, 0, 0, 0.34);
        pointer-events: auto;
    }

    #screen-game-board .board-viewport {
        width: 100%;
        max-width: 100%;
        height: auto !important;
        min-height: 0;
        flex: 0 0 auto !important;
        padding: max(8px, env(safe-area-inset-top)) 8px 8px !important;
        align-items: center;
        justify-content: center;
        overflow: visible !important;
    }

    #screen-game-board .board-container {
        max-width: 100%;
        max-height: none;
        margin: 0 auto;
    }

    #screen-game-board .board-container.board-portrait {
        width: min(76vw, 360px) !important;
        max-width: 76vw !important;
        aspect-ratio: 9 / 16;
        min-height: 0;
    }

    #screen-game-board .board-container:not(.board-portrait) {
        width: min(96vw, 460px) !important;
        max-width: 96vw !important;
        aspect-ratio: 16 / 9;
    }

    #screen-game-board .board-container.board-portrait .board-space {
        width: 10.4%;
        height: 5.85%;
        border-width: 2px;
        font-size: clamp(0.58rem, 3.5vw, 0.84rem);
    }

    #screen-game-board .board-container.board-portrait .player-token {
        width: 20px;
        height: 20px;
        font-size: 0.54rem;
        border-width: 2px;
    }

    #screen-game-board .sidebar-panel {
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        height: auto !important;
        max-height: none !important;
        flex: 0 0 auto !important;
        display: grid !important;
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas:
            "project"
            "scores"
            "turn"
            "logs"
            "actions";
        gap: 10px;
        padding: 10px 12px 14px !important;
        border-left: none;
        border-top: 1px solid rgba(148, 163, 184, 0.18);
        overflow: visible !important;
    }

    #screen-game-board .project-info-header {
        grid-area: project;
        display: flex !important;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        margin: 0;
        padding: 0 0 2px;
        border-bottom: none;
    }

    #screen-game-board .project-info-header h3 {
        margin: 0;
        font-size: clamp(1.1rem, 5.8vw, 1.55rem);
        line-height: 1.08;
        overflow-wrap: anywhere;
    }

    #screen-game-board .project-info-header .btn-sound-toggle {
        display: none;
    }

    #screen-game-board .badge-level {
        flex: 0 0 auto;
        padding: 6px 9px;
        font-size: 0.88rem;
    }

    #screen-game-board .leaderboard-section {
        grid-area: scores;
        min-width: 0;
    }

    #screen-game-board .section-title {
        margin: 0 0 7px;
        font-size: clamp(0.84rem, 4vw, 1rem);
        letter-spacing: 0.08em;
    }

    #screen-game-board .players-status-list {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
    }

    #screen-game-board .player-status-row {
        width: 100%;
        min-width: 0 !important;
        padding: 9px 10px;
        gap: 7px;
        border-radius: 12px;
    }

    #screen-game-board .player-status-row strong,
    #screen-game-board .player-name,
    #screen-game-board .turn-player-pill span {
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    #screen-game-board .player-status-row .player-position {
        font-size: 0.8rem;
    }

    #screen-game-board .player-status-row .player-points {
        font-size: 1.08rem;
    }

    #screen-game-board .turn-dice-section {
        grid-area: turn;
        min-width: 0;
        display: grid !important;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: center;
        gap: 9px;
        padding: 10px;
        border-radius: 14px;
    }

    #screen-game-board .turn-info {
        min-width: 0;
    }

    #screen-game-board .turn-player-pill {
        width: 100%;
        max-width: 100%;
        padding: 9px 10px;
        gap: 8px;
    }

    #screen-game-board .dice-area {
        min-width: 0;
        display: flex;
        flex-direction: row;
        justify-content: flex-end;
        align-items: center;
        gap: 8px;
    }

    #screen-game-board .dice-wrapper {
        width: 48px;
        height: 48px;
        min-width: 48px;
    }

    #screen-game-board .dice-element {
        --dice-size: 48px;
        --dice-translate: 24px;
    }

    #screen-game-board #btn-roll-dice {
        min-width: 108px;
        width: auto;
        padding: 10px 12px;
        font-size: 0.78rem;
        white-space: normal;
    }

    #screen-game-board .game-logs-section {
        grid-area: logs;
        min-width: 0;
    }

    #screen-game-board .logs-container {
        width: 100%;
        height: auto;
        min-height: 48px;
        max-height: 86px;
        padding: 10px 12px;
        overflow-x: hidden;
        overflow-y: auto;
        border-radius: 12px;
    }

    #screen-game-board .log-entry {
        font-size: 0.82rem;
        line-height: 1.25;
        overflow-wrap: anywhere;
    }

    #screen-game-board .sidebar-footer {
        grid-area: actions;
        width: 100%;
        max-width: 100%;
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
        margin: 0;
        padding: 0;
        border-top: none;
    }

    #screen-game-board .sidebar-footer > div,
    #screen-game-board .sidebar-footer .footer-credit {
        display: none !important;
    }

    #screen-game-board .sidebar-footer .btn {
        width: 100%;
        min-width: 0;
        max-width: 100%;
        padding: 11px 10px;
        border-radius: 12px;
        font-size: clamp(0.72rem, 3.4vw, 0.86rem);
        letter-spacing: 0.06em;
        white-space: normal;
        line-height: 1.15;
    }

    .modal-content,
    .question-modal-content {
        width: min(94vw, 520px);
        max-width: 94vw;
        max-height: min(88svh, 720px);
        overflow-y: auto;
    }
}

@media (max-width: 390px) and (orientation: portrait) {
    #screen-game-board .board-container.board-portrait {
        width: min(72vw, 330px) !important;
        max-width: 72vw !important;
    }

    #screen-game-board .mobile-action-btn {
        width: 38px;
        height: 38px;
        min-width: 38px;
        min-height: 38px;
        font-size: 0.92rem;
    }

    #screen-game-board .players-status-list {
        gap: 6px;
    }

    #screen-game-board .player-status-row {
        padding: 8px;
    }

    #screen-game-board #btn-roll-dice {
        min-width: 96px;
        font-size: 0.72rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .triviax-logo::after {
        animation: none;
        display: none;
    }

    .triviax-logo__x,
    .triviax-logo__version {
        transform: none;
    }

    .intro-splash-stack {
        animation: none;
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

/* ------------------------------------------------------------------
   MODALIDAD "ESTUDIA Y RESPONDE"
   Página propia: study.php
------------------------------------------------------------------ */

.study-page-body {
    width: 100%;
    min-height: 100vh;
    height: auto;
    overflow: auto;
}

.study-page {
    width: min(1180px, calc(100% - 32px));
    min-height: 100vh;
    margin: 0 auto;
    padding: 22px 0 42px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.study-topbar,
.study-hero,
.study-status-row,
.study-metrics {
    width: 100%;
}

.study-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 0;
}

.study-brand {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 2px;
}

.study-topbar-actions,
.study-session-actions,
.study-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.study-user {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.study-hero {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 18px;
    padding: 22px 0 10px;
}

.study-kicker,
.study-card-eyebrow {
    color: #a5b4fc;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.study-hero h1,
.study-card-view h1 {
    margin-top: 6px;
    color: var(--text-primary);
    font-size: 2rem;
    line-height: 1.1;
}

.study-hero p:not(.study-kicker) {
    margin-top: 8px;
    max-width: 620px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.study-status-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
    gap: 16px;
    align-items: center;
    padding: 14px 16px;
    background: rgba(9, 13, 22, 0.64);
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

.study-status {
    color: var(--text-secondary);
    min-height: 1.4em;
}

.study-status[data-tone="ok"] {
    color: #34d399;
}

.study-status[data-tone="warn"] {
    color: #fbbf24;
}

.study-status[data-tone="error"] {
    color: #f87171;
}

.study-progress {
    display: grid;
    gap: 7px;
    color: var(--text-muted);
    font-size: 0.82rem;
}

.study-progress-track {
    height: 9px;
    overflow: hidden;
    background: rgba(148, 163, 184, 0.18);
    border-radius: 999px;
}

.study-progress-bar {
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, #10b981 0%, #6366f1 100%);
    border-radius: inherit;
    transition: width 0.3s ease;
}

.study-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.study-metric {
    min-height: 74px;
    padding: 14px 16px;
    background: rgba(17, 24, 39, 0.62);
    border: 1px solid var(--border-color);
    border-radius: 14px;
}

.study-metric strong {
    display: block;
    color: var(--text-primary);
    font-size: 1.45rem;
    line-height: 1;
}

.study-metric span {
    display: block;
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.study-catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.study-deck-card {
    min-height: 220px;
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.study-deck-card h2,
.study-empty-state h2,
.study-vocabulary h2,
.study-hard-list h2 {
    color: var(--text-primary);
    font-size: 1.15rem;
    line-height: 1.2;
}

.study-deck-card p,
.study-empty-state p {
    color: var(--text-secondary);
    line-height: 1.45;
}

.study-deck-meta,
.study-feedback-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
}

.study-deck-meta span,
.study-feedback-meta span,
.study-card-eyebrow {
    padding: 6px 9px;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.22);
    border-radius: 999px;
}

.study-empty-state {
    padding: 30px;
    background: rgba(17, 24, 39, 0.62);
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

.study-workspace {
    display: flex;
    justify-content: center;
}

.study-card-view {
    width: min(860px, 100%);
    padding: 26px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.study-objective {
    color: #c4b5fd;
    line-height: 1.45;
}

.study-text {
    color: var(--text-primary);
    font-size: 1.08rem;
    line-height: 1.68;
}

.study-key-idea {
    display: grid;
    gap: 6px;
    padding: 14px 16px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.22);
    border-radius: 14px;
}

.study-key-idea strong {
    color: #6ee7b7;
}

.study-key-idea span,
.study-vocab-row span {
    color: var(--text-secondary);
    line-height: 1.45;
}

.study-vocabulary,
.study-hard-list {
    display: grid;
    gap: 10px;
}

.study-vocab-row {
    display: grid;
    gap: 5px;
    padding: 12px 0;
    border-top: 1px solid var(--border-color);
}

.study-answer-form,
.study-answer-area {
    display: grid;
    gap: 16px;
}

.study-option-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.study-option-button,
.study-sequence-row,
.study-pair-row {
    min-height: 54px;
    padding: 13px 14px;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    font-family: var(--font-main);
}

.study-option-button {
    cursor: pointer;
    text-align: left;
    font-weight: 700;
}

.study-option-button:hover,
.study-option-button.is-selected {
    border-color: rgba(99, 102, 241, 0.8);
    background: rgba(99, 102, 241, 0.22);
}

.study-field-label {
    display: grid;
    gap: 8px;
    color: var(--text-secondary);
    font-weight: 700;
}

.study-textarea,
.study-pair-row select {
    width: 100%;
    color: var(--text-primary);
    background: rgba(9, 13, 22, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    font-family: var(--font-main);
}

.study-textarea {
    min-height: 130px;
    padding: 14px;
    resize: vertical;
    line-height: 1.5;
}

.study-pair-list,
.study-sequence-list {
    display: grid;
    gap: 10px;
}

.study-pair-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(180px, 260px);
    gap: 12px;
    align-items: center;
}

.study-pair-row select {
    min-height: 42px;
    padding: 0 10px;
}

.study-sequence-list {
    list-style-position: inside;
}

.study-sequence-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.study-sequence-controls {
    display: flex;
    gap: 6px;
    flex: 0 0 auto;
}

.study-icon-button {
    width: 36px;
    height: 36px;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    cursor: pointer;
}

.study-icon-button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.study-feedback.is-correct {
    border-color: rgba(16, 185, 129, 0.36);
}

.study-feedback.is-incorrect {
    border-color: rgba(245, 158, 11, 0.36);
}

.study-summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.study-summary-item {
    padding: 16px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.study-summary-item strong {
    display: block;
    font-size: 1.5rem;
}

.study-summary-item span {
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.study-warning {
    color: #fbbf24;
}

.study-hidden {
    display: none !important;
}

@media (max-width: 760px) {
    .study-page {
        width: min(100% - 22px, 640px);
        padding-top: 10px;
    }

    .study-topbar,
    .study-hero,
    .study-status-row {
        align-items: stretch;
        grid-template-columns: 1fr;
        flex-direction: column;
    }

    .study-topbar-actions,
    .study-session-actions {
        width: 100%;
    }

    .study-topbar-actions .btn,
    .study-session-actions .btn,
    .study-actions .btn {
        flex: 1 1 160px;
    }

    .study-hero h1,
    .study-card-view h1 {
        font-size: 1.55rem;
    }

    .study-metrics,
    .study-summary-grid,
    .study-option-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .study-pair-row {
        grid-template-columns: 1fr;
    }

    .study-card-view {
        padding: 20px;
    }
}

@media (max-width: 430px) {
    .study-metrics,
    .study-summary-grid,
    .study-option-grid {
        grid-template-columns: 1fr;
    }

    .study-card-view {
        padding: 17px;
    }
}

/* ============================================================
   Correcciones de auditoría UI — accesibilidad y layout
   (2026-06-13). Ver auditoría: foco visible, truncado de
   título del panel y solape de la barra de acciones flotante.
   ============================================================ */

/* Fix 2 — Foco visible para navegación por teclado.
   Muchos botones usan outline:none sin reemplazo; este anillo
   solo aparece con teclado (:focus-visible), no con el ratón. */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible,
.category-chip:focus-visible,
.activity-card:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 6px;
}

/* Fix 1a — El título del panel de juego es un flex-item: sin
   min-width:0 el text-overflow:ellipsis nunca se aplica y el
   texto desborda el viewport. Esto lo corrige en todos los anchos. */
.project-info-header {
    min-width: 0;
}
.project-info-header > div:first-child {
    min-width: 0;
    flex: 1 1 auto;
}
.project-info-header h3 {
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Fix 1b — En landscape ≤1024px la barra de acciones flotante
   (🔊 🔄 🏠, position:absolute) se monta sobre el encabezado del
   panel. Se reserva espacio superior para que no lo tape. */
@media (max-width: 1024px) and (orientation: landscape) {
    .sidebar-panel {
        padding-top: 60px !important;
    }
    /* La barra flotante ya ofrece sonido; ocultar el 🔊 redundante
       del encabezado del panel para no duplicar el control. */
    #screen-game-board .project-info-header .btn-sound-toggle {
        display: none;
    }
}