/* ==========================================================================
   SIMULADOR DE EXÁMENES - RADIO CLUB TALAGANTE
   Diseño Original Restaurado & Modernizado con Identidad Única
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&display=swap');
@import url('https://fonts.googleapis.com/icon?family=Material+Icons+Outlined');

/* ==========================================================================
   Variables y Design Tokens - Identidad Radio Club Talagante
   ========================================================================== */
:root {
    /* Tipografía */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Color de Identidad Radio Club Talagante */
    --primary: #FF3B30;
    --primary-dark: #D32F2F;
    --primary-light: #FF6659;
    --primary-glow: rgba(255, 59, 48, 0.35);

    /* Acentos por Categoría Oficial SUBTEL */
    --accent-green: #10B981;   /* Aspirante (CD) */
    --accent-blue: #3B82F6;    /* Novicio (CA) */
    --accent-purple: #8B5CF6;  /* General (CE) */
    --accent-orange: #F59E0B;  /* Superior (XQ) */

    /* Estados */
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;

    /* Fondos - Tema Oscuro Original */
    --bg-dark: #070a12;
    --bg-light: #0b0f19;
    --bg-white: #1e293b;
    --surface-light: rgba(30, 41, 59, 0.55);
    --surface-solid: #151d2f;
    --surface-dark: #0f172a;
    --bg-glass: rgba(11, 15, 25, 0.85);

    /* Textos */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-white: #ffffff;

    /* Bordes */
    --border-light: rgba(255, 255, 255, 0.08);
    --border-card: rgba(255, 255, 255, 0.12);
    --border-accent: rgba(255, 59, 48, 0.4);

    /* Sombras */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 14px 40px rgba(0, 0, 0, 0.5);

    /* Radios */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 26px;
    --radius-full: 9999px;

    --transition-fast: 0.18s ease;
    --transition-normal: 0.28s ease;
}

/* Modo Claro Opcional */
body.light-theme {
    --bg-dark: #f1f5f9;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --surface-light: rgba(255, 255, 255, 0.85);
    --surface-solid: #ffffff;
    --surface-dark: #e2e8f0;
    --bg-glass: rgba(255, 255, 255, 0.9);

    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --text-white: #0f172a;

    --border-light: rgba(0, 0, 0, 0.08);
    --border-card: rgba(0, 0, 0, 0.12);
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    width: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    padding-top: 5rem; /* Espacio para el nav flotante fijo */
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, .cta-button, .start-btn, .nav-logo-text h3 {
    font-family: var(--font-heading);
    font-weight: 700;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
    background: none;
}

.container {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* ==========================================================================
   HERO SECTION - Con Imagen de Fondo back_2.jpg y Panel Resumen
   ========================================================================== */
.hero-section {
    position: relative;
    padding: 6.5rem 1.5rem 5.5rem;
    color: #ffffff;
    background-color: #070a12;
    background-image: 
        linear-gradient(180deg, rgba(7, 10, 18, 0.72) 0%, rgba(7, 10, 18, 0.92) 100%),
        url('images/back_2.jpg');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    overflow: hidden;
}

body.light-theme .hero-section {
    background-image: 
        linear-gradient(180deg, rgba(245, 245, 247, 0.85) 0%, rgba(245, 245, 247, 0.95) 100%),
        url('images/back_2.jpg');
    color: #0f172a;
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 36px 36px;
    pointer-events: none;
}

.hero-content {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.2fr 0.85fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 2.85rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
    color: #ffffff;
}

body.light-theme .hero-title {
    color: #0f172a;
}

.hero-subtitle {
    font-size: 1.1rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 2rem;
    max-width: 560px;
}

body.light-theme .hero-subtitle {
    color: #334155;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.95rem 1.8rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #ffffff;
    font-weight: 700;
    font-size: 1rem;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 18px var(--primary-glow);
    transition: all var(--transition-fast);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--primary-glow);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
}

.ghost-button {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.95rem 1.5rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-md);
    backdrop-filter: blur(8px);
    transition: all var(--transition-fast);
}

body.light-theme .ghost-button {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.12);
    color: #0f172a;
}

.ghost-button:hover {
    background: rgba(255, 255, 255, 0.16);
    transform: translateY(-2px);
}

/* Panel Resumen Lateral del Hero */
.hero-panel {
    background: rgba(15, 23, 42, 0.75);
    border: 1px solid var(--border-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

body.light-theme .hero-panel {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(0, 0, 0, 0.1);
}

.panel-topline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
}

.panel-topline span {
    color: var(--text-muted);
    font-weight: 600;
}

.panel-topline strong {
    color: var(--primary-light);
    font-weight: 800;
}

.signal-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
}

body.light-theme .signal-card {
    background: #f1f5f9;
}

.signal-card .material-icons-outlined {
    font-size: 2rem;
    color: var(--primary);
}

.signal-card strong {
    display: block;
    font-size: 1.05rem;
    margin-bottom: 0.2rem;
}

.signal-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.mini-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    text-align: center;
}

.mini-stats div {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 0.85rem 0.5rem;
}

body.light-theme .mini-stats div {
    background: #f8fafc;
}

.mini-stats strong {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.7rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--text-primary);
}

.mini-stats span {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==========================================================================
   FLOATING PILL NAVIGATION - Barra Flotante Redondeada
   ========================================================================== */
.sticky-nav {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 2.5rem);
    max-width: 1100px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 50px;
    border: 1px solid rgba(0, 0, 0, 0.07);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.10), 0 1px 4px rgba(0,0,0,0.06);
}

body.light-theme .sticky-nav {
    background: rgba(255, 255, 255, 0.97);
}

.nav-container {
    padding: 0.6rem 1rem 0.6rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.nav-logo-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    overflow: hidden;
    background: #f1f5f9;
}

.nav-logo-icon img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.nav-logo-text h3 {
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: #0f172a;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 600;
    color: #334155;
    transition: color var(--transition-fast);
    padding: 0.25rem 0;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-btn-icon {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #64748b;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: all var(--transition-fast);
}

.nav-btn-icon:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(255, 59, 48, 0.07);
}


/* ==========================================================================
   SECCIÓN DE CATEGORÍAS - Layout Original (Panel Izq + Filas Derecha)
   ========================================================================== */
.main-content {
    padding: 4.5rem 0 6rem;
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 3rem;
}

.section-header h2 {
    font-size: 2.3rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 1.05rem;
    color: var(--text-muted);
}

.simulator-layout {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 2rem;
    align-items: start;
}

/* Panel Izquierdo: Flujo Simple */
.simulator-info-panel {
    background: var(--surface-light);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-xl);
    padding: 2rem;
    backdrop-filter: blur(12px);
}

.info-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.75rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.info-header .material-icons-outlined {
    font-size: 1.8rem;
    color: var(--primary);
}

.info-header h3 {
    font-size: 1.3rem;
    font-weight: 800;
}

.instruction-list {
    list-style: none;
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.instruction-list li {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.instruction-list .num {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: rgba(255, 59, 48, 0.15);
    border: 1px solid rgba(255, 59, 48, 0.35);
    color: var(--primary-light);
    font-family: var(--font-heading);
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.instruction-list h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.instruction-list p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.45;
}

.help-box {
    display: flex;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.help-box .material-icons-outlined {
    color: var(--accent-orange);
    flex-shrink: 0;
}

/* Lista Derecha de Categorías (Filas Horizontales) */
.categories-list {
    display: grid;
    gap: 1.25rem;
}

.category-row {
    background: var(--surface-light);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-xl);
    padding: 1.5rem 1.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.category-row::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    background: var(--cat-color, var(--primary));
    opacity: 0.9;
    transition: width var(--transition-fast);
}

.category-row:hover {
    transform: translateY(-3px);
    border-color: var(--cat-color, var(--primary));
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
}

.category-row:hover::before {
    width: 8px;
}

.category-badge {
    width: 58px;
    height: 58px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.45rem;
    font-weight: 900;
    flex-shrink: 0;
    border: 2px solid currentColor;
}

.category-badge.green { color: var(--accent-green); background: rgba(16, 185, 129, 0.12); }
.category-badge.blue { color: var(--accent-blue); background: rgba(59, 130, 246, 0.12); }
.category-badge.purple { color: var(--accent-purple); background: rgba(139, 92, 246, 0.12); }
.category-badge.orange { color: var(--accent-orange); background: rgba(245, 158, 11, 0.12); }

.category-row:nth-child(1) { --cat-color: var(--accent-green); }
.category-row:nth-child(2) { --cat-color: var(--accent-blue); }
.category-row:nth-child(3) { --cat-color: var(--accent-purple); }
.category-row:nth-child(4) { --cat-color: var(--accent-orange); }

.category-info {
    flex: 1;
}

.category-info h3 {
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.category-info p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.65rem;
}

.badge-row {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.badge-pill {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
}

.category-action {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.75rem;
    flex-shrink: 0;
}

.approval-rate {
    text-align: right;
}

.approval-rate .rate {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--cat-color, var(--primary));
}

.approval-rate .label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.action-btn-styled {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.65rem 1.15rem;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 700;
    transition: all var(--transition-fast);
}

.category-row:hover .action-btn-styled {
    background: var(--cat-color, var(--primary));
    color: #ffffff;
    border-color: var(--cat-color, var(--primary));
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

/* ==========================================================================
   MODALES (Configuración, Reporte, Confirmación, Zoom HD)
   ========================================================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(4, 8, 16, 0.82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-container {
    background: var(--surface-solid);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 560px;
    padding: 2.25rem;
    box-shadow: var(--shadow-lg);
    transform: scale(0.96) translateY(10px);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.active .modal-container {
    transform: scale(1) translateY(0);
}

.modal-container.modal-small {
    max-width: 440px;
}

.modal-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.modal-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: rgba(255, 59, 48, 0.15);
    color: var(--primary);
}

.modal-icon.warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.modal-title {
    font-size: 1.45rem;
    font-weight: 800;
}

.modal-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Modos de Práctica */
.study-modes-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
    margin-bottom: 1.5rem;
}

.mode-option-card {
    background: rgba(255, 255, 255, 0.04);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mode-option-card:hover {
    border-color: var(--primary);
}

.mode-option-card.selected {
    border-color: var(--primary);
    background: rgba(255, 59, 48, 0.1);
}

.mode-option-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 0.35rem;
    color: var(--text-primary);
}

.mode-option-header .material-icons-outlined {
    font-size: 1.2rem;
    color: var(--primary);
}

.mode-option-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.total-summary-box {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 0.95rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    margin-bottom: 1.75rem;
}

.total-summary-box strong {
    font-size: 1.3rem;
    color: var(--primary-light);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.85rem;
}

.modal-btn {
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.modal-btn.secondary {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
}

.modal-btn.secondary:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.12);
}

.modal-btn.primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.modal-btn.primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}

.modal-btn.danger {
    background: var(--danger);
    color: #ffffff;
}

.modal-btn.danger:hover {
    background: #dc2626;
}

/* ==========================================================================
   INTERFAZ DE EXAMEN
   ========================================================================== */
.exam-container {
    display: none;
    padding: 2rem 0 5rem;
}

.exam-container.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.exam-topbar {
    background: var(--surface-light);
    border: 1px solid var(--border-card);
    backdrop-filter: blur(14px);
    border-radius: var(--radius-xl);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.exam-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.exam-category-pill {
    padding: 0.35rem 0.95rem;
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: rgba(255, 59, 48, 0.15);
    color: var(--primary);
    border: 1px solid rgba(255, 59, 48, 0.35);
}

.exam-timer {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--text-primary);
}

.exam-timer.warning {
    color: var(--danger);
    border-color: var(--danger);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.95); }
}

.exam-topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.exam-action-icon-btn {
    padding: 0.55rem 0.95rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all var(--transition-fast);
}

.exam-action-icon-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-accent);
}

.exam-action-icon-btn.active {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
    border-color: var(--warning);
}

.exam-progress-bar-wrap {
    width: 100%;
    margin-top: 0.85rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.progress-track {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, #ff8577 100%);
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Tarjeta Principal de Pregunta */
.question-card {
    background: var(--surface-light);
    border: 1px solid var(--border-card);
    backdrop-filter: blur(14px);
    border-radius: var(--radius-xl);
    padding: 2.25rem;
    margin-bottom: 1.75rem;
    box-shadow: var(--shadow-md);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.question-badges {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.badge-subject {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-subject.legal {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-subject.technical {
    background: rgba(255, 59, 48, 0.15);
    color: var(--primary-light);
    border: 1px solid var(--border-accent);
}

.question-id-pill {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.question-text {
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.45;
    margin-bottom: 1.75rem;
    color: var(--text-primary);
}

/* Diagramas y Esquemas (Vectoriales + Zoom) */
.diagram-card {
    background: var(--surface-solid);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.diagram-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 59, 48, 0.15);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary-light);
}

.diagram-vector-content {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem 0;
    min-height: 190px;
}

.vector-diagram {
    max-width: 100%;
    height: auto;
    color: var(--text-primary);
}

.diagram-image-wrapper {
    position: relative;
    cursor: zoom-in;
    display: inline-block;
    max-width: 100%;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #ffffff;
    padding: 1rem;
}

.enhanced-circuit-img {
    max-width: 100%;
    max-height: 260px;
    object-fit: contain;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    filter: contrast(1.15) brightness(0.98);
}

.enhanced-circuit-img.inverted {
    filter: invert(1) hue-rotate(180deg) contrast(1.25);
    background: #000000;
}

.diagram-toolbar {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.diagram-btn {
    padding: 0.45rem 0.95rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.diagram-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.diagram-btn.ghost {
    color: var(--text-muted);
}

/* Opciones de Respuesta */
.options-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.9rem;
    margin-bottom: 2rem;
}

.option-btn {
    width: 100%;
    padding: 1.15rem 1.35rem;
    border-radius: var(--radius-lg);
    background: var(--surface-solid);
    border: 2px solid var(--border-light);
    color: var(--text-primary);
    text-align: left;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 1.15rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.option-btn:hover:not([disabled]) {
    border-color: var(--border-accent);
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(4px);
}

.option-letter {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.1rem;
    flex-shrink: 0;
    color: var(--text-secondary);
}

.option-btn.selected {
    border-color: var(--primary);
    background: rgba(255, 59, 48, 0.12);
    box-shadow: 0 4px 16px var(--primary-glow);
}

.option-btn.selected .option-letter {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

/* Feedback de Entrenamiento */
.option-btn.correct-training {
    border-color: var(--success) !important;
    background: rgba(16, 185, 129, 0.15) !important;
}

.option-btn.correct-training .option-letter {
    background: var(--success) !important;
    color: #ffffff !important;
    border-color: var(--success) !important;
}

.option-btn.incorrect-training {
    border-color: var(--danger) !important;
    background: rgba(239, 68, 68, 0.15) !important;
}

.option-btn.incorrect-training .option-letter {
    background: var(--danger) !important;
    color: #ffffff !important;
    border-color: var(--danger) !important;
}

.training-feedback-box {
    margin-top: 1.5rem;
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-md);
    background: var(--surface-solid);
    border: 1px solid var(--border-card);
}

.training-feedback-box.correct {
    border-color: rgba(16, 185, 129, 0.4);
    background: rgba(16, 185, 129, 0.08);
}

.training-feedback-box.incorrect {
    border-color: rgba(239, 68, 68, 0.4);
    background: rgba(239, 68, 68, 0.08);
}

.feedback-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 800;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.feedback-title.correct { color: var(--success); }
.feedback-title.incorrect { color: var(--danger); }

.feedback-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Barra Inferior del Examen */
.exam-nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.nav-group-left, .nav-group-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.exam-btn {
    padding: 0.85rem 1.4rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.exam-btn.primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.exam-btn.primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}

.exam-btn.secondary {
    background: var(--surface-solid);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
}

.exam-btn.secondary:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

.exam-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
}

/* ==========================================================================
   MAPA / MATRIZ DE PREGUNTAS
   ========================================================================== */
.matrix-modal-container {
    max-width: 680px;
}

.matrix-legend {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
    font-size: 0.85rem;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
}

.legend-dot.answered { background: var(--primary); }
.legend-dot.unanswered { background: rgba(255, 255, 255, 0.15); border: 1px solid var(--border-light); }
.legend-dot.flagged { background: var(--warning); }

.matrix-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
    gap: 0.6rem;
    max-height: 380px;
    overflow-y: auto;
    padding-right: 0.5rem;
    margin-bottom: 1.5rem;
}

.matrix-btn {
    height: 44px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--transition-fast);
}

.matrix-btn:hover {
    border-color: var(--primary);
    color: var(--text-primary);
    transform: scale(1.06);
}

.matrix-btn.current {
    border-color: var(--primary-light);
    box-shadow: 0 0 10px var(--primary-glow);
}

.matrix-btn.answered {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.matrix-btn.flagged::after {
    content: '';
    position: absolute;
    top: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--warning);
    box-shadow: 0 0 6px var(--warning);
}

/* ==========================================================================
   PANTALLA DE RESULTADOS
   ========================================================================== */
.results-container {
    display: none;
    padding: 3rem 0 6rem;
}

.results-container.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

.results-hero-card {
    background: var(--surface-light);
    border: 1px solid var(--border-card);
    backdrop-filter: blur(14px);
    border-radius: var(--radius-xl);
    padding: 3rem 2rem;
    text-align: center;
    margin-bottom: 2.5rem;
}

.results-hero-card.passed {
    border-color: rgba(16, 185, 129, 0.4);
    background: radial-gradient(circle at 50% 10%, rgba(16, 185, 129, 0.15) 0%, var(--surface-light) 70%);
}

.results-hero-card.failed {
    border-color: rgba(239, 68, 68, 0.4);
    background: radial-gradient(circle at 50% 10%, rgba(239, 68, 68, 0.15) 0%, var(--surface-light) 70%);
}

.results-verdict-title {
    font-size: 2.8rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
}

.results-hero-card.passed .results-verdict-title { color: var(--success); }
.results-hero-card.failed .results-verdict-title { color: var(--danger); }

.results-verdict-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

/* Gauge circular */
.score-circle-wrap {
    width: 160px;
    height: 160px;
    margin: 0 auto 2rem;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.score-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.score-svg circle {
    fill: none;
    stroke-width: 10;
    stroke-linecap: round;
}

.score-svg-bg {
    stroke: rgba(255, 255, 255, 0.08);
}

.score-svg-fill {
    stroke: var(--primary);
    stroke-dasharray: 440;
    stroke-dashoffset: 440;
    transition: stroke-dashoffset 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.score-text-inner {
    position: absolute;
    text-align: center;
}

.score-text-inner .big-percent {
    font-family: var(--font-heading);
    font-size: 2.6rem;
    font-weight: 900;
    line-height: 1;
}

.score-text-inner .score-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

/* Desglose SUBTEL */
.results-breakdown-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    max-width: 800px;
    margin: 0 auto 2.5rem;
    text-align: left;
}

.breakdown-card {
    background: var(--surface-solid);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.breakdown-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.85rem;
}

.breakdown-card-header h4 {
    font-size: 1.1rem;
    font-weight: 700;
}

.breakdown-badge {
    padding: 0.2rem 0.65rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 800;
}

.breakdown-badge.passed {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.breakdown-badge.failed {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

.breakdown-metric {
    font-size: 1.8rem;
    font-family: var(--font-heading);
    font-weight: 800;
    margin-bottom: 0.3rem;
}

.breakdown-subtext {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.results-actions-wrap {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

/* Revisión Detallada */
.review-section {
    background: var(--surface-light);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-xl);
    padding: 2.25rem;
}

.review-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-light);
}

.review-tabs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.review-tab-btn {
    padding: 0.45rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
    transition: all var(--transition-fast);
}

.review-tab-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.review-list {
    display: grid;
    gap: 1.25rem;
}

.review-item-card {
    background: var(--surface-solid);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.review-item-card.correct { border-left: 5px solid var(--success); }
.review-item-card.incorrect { border-left: 5px solid var(--danger); }

.review-item-header {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.review-item-status-icon {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #ffffff;
}

.review-item-card.correct .review-item-status-icon { background: var(--success); }
.review-item-card.incorrect .review-item-status-icon { background: var(--danger); }

.review-item-title {
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.4;
}

.review-answers-box {
    margin-top: 0.75rem;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    background: rgba(0, 0, 0, 0.2);
    font-size: 0.9rem;
    display: grid;
    gap: 0.4rem;
}

.user-answer-row { color: var(--danger); }
.correct-answer-row { color: var(--success); font-weight: 600; }

/* ==========================================================================
   MODAL DE ZOOM HD
   ========================================================================== */
.zoom-modal-container {
    max-width: 920px;
    width: 95%;
    padding: 1.5rem;
}

.zoom-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.zoom-viewport {
    width: 100%;
    min-height: 400px;
    max-height: 70vh;
    background: #ffffff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-card);
}

.zoom-viewport.dark-bg {
    background: #000000;
}

.zoom-content-target {
    max-width: 90%;
    max-height: 90%;
    transition: transform 0.2s ease;
    transform-origin: center center;
}

.zoom-content-target.inverted {
    filter: invert(1) hue-rotate(180deg) contrast(1.3);
}

.zoom-controls-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-light);
    padding: 3rem 0 2rem;
    color: var(--text-muted);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-light);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-logo-img {
    height: 45px;
    width: auto;
}

.footer-links a {
    color: var(--primary-light);
    font-weight: 600;
}

.footer-links a:hover {
    color: #ffffff;
}

.footer-info {
    text-align: center;
    font-size: 0.85rem;
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin: 0 auto 2rem;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-title {
        font-size: 2.3rem;
    }

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

@media (max-width: 640px) {
    .hero-title {
        font-size: 1.95rem;
    }

    .category-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .category-action {
        width: 100%;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .action-btn-styled {
        width: auto;
    }

    .question-card {
        padding: 1.5rem 1.15rem;
    }

    .question-text {
        font-size: 1.15rem;
    }
}