/* ==========================================================================
   NDA ACADEMY — SISTEMA DE DISEÑO ACADÉMICO HARVARD & IVY LEAGUE (CSS3)
   Inspirado en la elegancia editorial, tipografía serif autoritativa y
   fondos blancos modernos de la Universidad de Harvard.
   Cumple con @modern-web-guidance (carousel-slide-effects, motion, view-transitions).
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. VARIABLES DE DISEÑO INSTITUCIONAL (PALETA HARVARD & BLANCOS MODERNOS)
   -------------------------------------------------------------------------- */
:root {
    /* Fondos Blancos y Superficies Académicas */
    --bg-main: #FFFFFF;
    --bg-surface: #F9FAFB;
    --bg-surface-alt: #F3F4F6;
    --bg-card: #FFFFFF;
    --bg-card-hover: #FDFBFB;
    --bg-crimson-tint: #FDF2F4;
    --bg-gold-tint: #FAF6ED;

    /* Bordes y Separadores Finos */
    --border: #E5E7EB;
    --border-light: #F0F2F5;
    --border-dark: #D1D5DB;
    --border-crimson: rgba(165, 28, 48, 0.22);
    --border-gold: rgba(196, 154, 69, 0.35);

    /* Paleta Oficial Harvard University */
    --harvard-crimson: #A51C30;       /* Pantone 187 C - Crimson Oficial */
    --harvard-crimson-hover: #8B1425;
    --harvard-crimson-dark: #5E0B17;
    --harvard-crimson-light: #FDF2F4;

    /* Acentos de Honor & Cuantitativos */
    --accent-gold: #C49A45;
    --accent-gold-dark: #9A7426;
    --accent-gold-light: #FAF5E8;

    --success: #0D7A53;
    --success-light: #EBF8F2;
    --danger: #B91C1C;
    --danger-light: #FEE2E2;
    --warning: #B45309;
    --info: #1D4ED8;

    /* Tipografía de Alto Contraste y Autoridad */
    --text-ink: #1B1E23;              /* Texto principal de máxima legibilidad */
    --text-main: #24292F;
    --text-muted: #4B5563;
    --text-subtle: #6B7280;
    --text-on-crimson: #FFFFFF;

    /* Fuentes Tipográficas */
    --font-serif: "Playfair Display", Georgia, "Times New Roman", serif;
    --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

    /* Elevaciones y Radios Sutiles (Estilo Académico Limpio) */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 12px 32px rgba(0, 0, 0, 0.09), 0 2px 6px rgba(0, 0, 0, 0.04);
    --shadow-crimson: 0 8px 24px rgba(165, 28, 48, 0.22);
}

/* --------------------------------------------------------------------------
   2. REINICIO & TIPOGRAFÍA BASE
   -------------------------------------------------------------------------- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    width: 100%;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.15s ease;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --------------------------------------------------------------------------
   3. MODERN WEB GUIDANCE: VIEW TRANSITIONS & ENTRANCE ANIMATIONS
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
    @view-transition {
        navigation: auto;
    }

    ::view-transition-old(root) {
        animation: 0.25s cubic-bezier(0.16, 1, 0.3, 1) both harvardFadeOut;
    }

    ::view-transition-new(root) {
        animation: 0.35s cubic-bezier(0.16, 1, 0.3, 1) both harvardFadeInUp;
    }

    .page-entrance, main, .container {
        animation: harvardPageIn 0.45s cubic-bezier(0.16, 1, 0.3, 1) both;
    }
}

@keyframes harvardFadeOut {
    to {
        opacity: 0;
        transform: translateY(-8px);
    }
}

@keyframes harvardFadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@media (prefers-reduced-motion: reduce) {
    *, ::view-transition-old(root), ::view-transition-new(root), .page-entrance, main, .container {
        animation: none !important;
        transition: none !important;
    }
}

/* --------------------------------------------------------------------------
   4. NAVBAR INSTITUCIONAL (ESTILO HARVARD WHITE & CRIMSON BORDER)
   -------------------------------------------------------------------------- */
.top-accent-bar {
    height: 4px;
    background: linear-gradient(90deg, var(--harvard-crimson) 0%, var(--harvard-crimson-hover) 70%, var(--accent-gold) 100%);
    width: 100%;
}

.navbar {
    background: #FFFFFF;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.nav-container {
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 clamp(16px, 2.5vw, 24px);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-crest-img {
    height: 44px;
    width: auto;
    object-fit: contain;
}

.logo-horizontal-img {
    height: 38px;
    width: auto;
    object-fit: contain;
}

/* Ticker Financiero Discreto Estilo Wall Street / Harvard */
.nav-ticker-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-surface);
    padding: 5px 12px;
    border-radius: var(--radius-xs);
    border: 1px solid var(--border);
    font-size: 11.5px;
    flex-shrink: 0;
}

.nav-ticker-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--success);
    display: inline-block;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-link {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-muted);
    padding: 5px 6px;
    position: relative;
    letter-spacing: 0.25px;
    white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
    color: var(--harvard-crimson);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--harvard-crimson);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

/* Botón Hamburguesa Móvil */
.nav-mobile-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    color: var(--text-ink);
    font-size: 20px;
    line-height: 1;
    padding: 6px 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    align-items: center;
    justify-content: center;
}

.nav-mobile-toggle:hover {
    background: var(--bg-surface);
    border-color: var(--harvard-crimson);
    color: var(--harvard-crimson);
}

/* Drawer Móvil Institucional */
.mobile-nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(18, 18, 18, 0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.mobile-nav-backdrop.open {
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav-drawer {
    position: fixed;
    top: 0;
    right: 0;
    width: min(340px, 86vw);
    height: 100vh;
    height: 100dvh;
    background: #FFFFFF;
    z-index: 999;
    box-shadow: -6px 0 30px rgba(0, 0, 0, 0.16);
    transform: translateX(100%);
    transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.mobile-nav-drawer.open {
    transform: translateX(0);
}

.mobile-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    background: #FFFFFF;
}

.mobile-drawer-close {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    width: 32px;
    height: 32px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.mobile-drawer-close:hover {
    color: var(--harvard-crimson);
    border-color: var(--harvard-crimson);
}

.mobile-drawer-ticker {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #FAF7F2;
    border-bottom: 1px solid var(--border);
    padding: 10px 20px;
}

.mobile-drawer-links {
    display: flex;
    flex-direction: column;
    padding: 14px 12px;
    gap: 3px;
}

.mobile-nav-link {
    padding: 10px 14px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-ink);
    text-decoration: none;
    border-radius: var(--radius-xs);
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-nav-link:hover {
    background: var(--bg-surface);
    color: var(--harvard-crimson);
}

.mobile-nav-link.active {
    background: #FAF0F2;
    color: var(--harvard-crimson);
    font-weight: 700;
}

.mobile-drawer-footer {
    margin-top: auto;
    padding: 20px;
    border-top: 1px solid var(--border);
    background: #FAF9F6;
}

/* --------------------------------------------------------------------------
   5. BOTONES INSTITUCIONALES (HARVARD CRIMSON & GOLD ACCENT)
   -------------------------------------------------------------------------- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--harvard-crimson);
    color: #FFFFFF;
    font-size: 13.5px;
    font-weight: 700;
    padding: 10px 22px;
    border-radius: var(--radius-xs);
    border: 1px solid var(--harvard-crimson-hover);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(165, 28, 48, 0.2);
    transition: all 0.2s ease;
    letter-spacing: 0.3px;
}

.btn-primary:hover {
    background: var(--harvard-crimson-hover);
    color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(165, 28, 48, 0.3);
    transform: translateY(-1px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #FFFFFF;
    color: var(--text-ink);
    font-size: 13.5px;
    font-weight: 700;
    padding: 10px 20px;
    border-radius: var(--radius-xs);
    border: 1px solid var(--border-dark);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: var(--bg-surface);
    border-color: var(--text-ink);
    color: var(--text-ink);
}

.btn-outline-crimson {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--harvard-crimson);
    font-size: 13px;
    font-weight: 700;
    padding: 8px 18px;
    border-radius: var(--radius-xs);
    border: 1.5px solid var(--harvard-crimson);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-outline-crimson:hover {
    background: var(--harvard-crimson-light);
    color: var(--harvard-crimson-dark);
}

/* --------------------------------------------------------------------------
   6. HARVARD HERO SLIDER CON EFECTOS MODERNOS (MODERN-WEB-GUIDANCE)
   -------------------------------------------------------------------------- */
.harvard-slider {
    position: relative;
    width: 100%;
    min-height: 520px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin: 24px 0 40px 0;
    background: #111419;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
}

.harvard-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.8s ease;
    display: flex;
    align-items: center;
}

.harvard-slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

.harvard-slide-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transform: scale(1.04);
    transition: transform 7s ease-out;
}

.harvard-slide.active .harvard-slide-bg {
    transform: scale(1);
}

/* Overlay Académico Elegante (Gradiente Sutil, sin neones) */
.harvard-slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(17, 20, 25, 0.94) 0%, rgba(17, 20, 25, 0.82) 48%, rgba(17, 20, 25, 0.35) 100%);
    z-index: 1;
}

.harvard-slide-content {
    position: relative;
    z-index: 3;
    max-width: 680px;
    padding: 60px 50px;
    color: #FFFFFF;
}

.harvard-slide-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(165, 28, 48, 0.9);
    color: #FFFFFF;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: 5px 12px;
    border-radius: 2px;
    margin-bottom: 18px;
}

.harvard-slide-title {
    font-family: var(--font-serif);
    font-size: 38px;
    line-height: 1.22;
    font-weight: 800;
    color: #FFFFFF;
    margin-bottom: 16px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.harvard-slide-desc {
    font-size: 16px;
    line-height: 1.6;
    color: #E5E7EB;
    margin-bottom: 28px;
}

.harvard-slide-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

/* Controles de Navegación del Slider */
.harvard-slider-controls {
    position: absolute;
    bottom: 24px;
    right: 32px;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 16px;
    background: rgba(17, 20, 25, 0.75);
    backdrop-filter: blur(8px);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.slider-indicators {
    display: flex;
    align-items: center;
    gap: 8px;
}

.slider-indicator {
    width: 28px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.slider-indicator.active {
    background: var(--harvard-crimson);
    width: 44px;
}

.slider-arrow-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #FFFFFF;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s ease;
}

.slider-arrow-btn:hover {
    background: var(--harvard-crimson);
    border-color: var(--harvard-crimson);
}

.slider-pause-btn {
    background: transparent;
    border: none;
    color: #D1D5DB;
    font-size: 12px;
    cursor: pointer;
    padding: 4px 6px;
}

.slider-pause-btn:hover {
    color: #FFFFFF;
}

/* --------------------------------------------------------------------------
   7. TICKER RIBBON FINANCIERO BLANCO INSTITUCIONAL
   -------------------------------------------------------------------------- */
.academic-ticker-ribbon {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 24px;
    margin-bottom: 50px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow-subtle);
}

.ticker-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.ticker-symbol {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-subtle);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ticker-price {
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 15px;
    color: var(--text-ink);
}

.ticker-status-pill {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 12px;
    color: var(--success);
    font-weight: 700;
    background: var(--success-light);
    padding: 5px 12px;
    border-radius: var(--radius-xs);
    border: 1px solid rgba(13, 122, 83, 0.2);
}

/* --------------------------------------------------------------------------
   8. CURSOS EDITORIALES HARVARD CON FOTOGRAFÍA (3 COLUMNAS)
   -------------------------------------------------------------------------- */
.section-header {
    text-align: center;
    max-width: 820px;
    margin: 0 auto 40px auto;
}

.section-eyebrow {
    font-size: 11.5px;
    font-weight: 800;
    color: var(--harvard-crimson);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
    display: inline-block;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 800;
    color: var(--text-ink);
    line-height: 1.25;
    margin-bottom: 12px;
}

.section-desc {
    font-size: 15.5px;
    color: var(--text-muted);
    line-height: 1.6;
}

.harvard-course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
    margin-bottom: 60px;
}

.harvard-course-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    display: flex;
    flex-direction: column;
}

.harvard-course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--border-crimson);
}

.course-card-image-wrap {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: #F3F4F6;
}

.course-card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.harvard-course-card:hover .course-card-image {
    transform: scale(1.05);
}

.course-card-level-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(17, 20, 25, 0.88);
    color: #FFFFFF;
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    padding: 4px 10px;
    border-radius: var(--radius-xs);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.course-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.course-card-department {
    font-size: 11px;
    font-weight: 800;
    color: var(--harvard-crimson);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 8px;
}

.course-card-title {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-ink);
    line-height: 1.3;
    margin-bottom: 10px;
}

.course-card-desc {
    font-size: 13.5px;
    color: var(--text-muted);
    line-height: 1.55;
    margin-bottom: 18px;
    flex-grow: 1;
}

.course-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 14px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-subtle);
}

.course-card-faculty {
    font-weight: 600;
    color: var(--text-ink);
}

/* --------------------------------------------------------------------------
   9. TABLA DE COMPARACIÓN EDITORIAL HARVARD (FONDO BLANCO Y FILAS CLARAS)
   -------------------------------------------------------------------------- */
.comparison-table-wrap {
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow-x: auto;
    box-shadow: var(--shadow-card);
    margin-bottom: 60px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    text-align: left;
}

.comparison-table th {
    background: var(--bg-surface);
    padding: 16px 20px;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border);
}

.comparison-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-main);
}

.comparison-table tr:hover td {
    background: var(--bg-surface);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

/* --------------------------------------------------------------------------
   10. TARJETAS DE CARACTERÍSTICAS Y MENTORÍA HARVARD
   -------------------------------------------------------------------------- */
.faculty-feature-card {
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 36px 32px;
    box-shadow: var(--shadow-card);
    display: flex;
    gap: 32px;
    align-items: center;
    margin-bottom: 60px;
}

.faculty-avatar-wrap {
    flex-shrink: 0;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--harvard-crimson);
    box-shadow: 0 4px 14px rgba(165, 28, 48, 0.15);
}

.faculty-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* --------------------------------------------------------------------------
   11. MEMBRESÍAS Y PLANES EDITORIALES
   -------------------------------------------------------------------------- */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 30px;
    max-width: 1050px;
    margin: 0 auto 60px auto;
}

.pricing-card {
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 36px 30px;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pricing-card.featured {
    border: 2px solid var(--harvard-crimson);
    box-shadow: var(--shadow-crimson);
}

.pricing-card.featured::before {
    content: "MEMBRESÍA RECOMENDADA";
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--harvard-crimson);
    color: #FFFFFF;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 1.5px;
    padding: 4px 14px;
    border-radius: var(--radius-xs);
}

.pricing-name {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 800;
    color: var(--text-ink);
    margin-bottom: 8px;
}

.pricing-price {
    font-size: 34px;
    font-weight: 900;
    color: var(--harvard-crimson);
    margin: 12px 0 6px 0;
}

.pricing-currency {
    font-size: 14px;
    color: var(--text-subtle);
    font-weight: 600;
}

.pricing-features {
    list-style: none;
    margin: 24px 0 32px 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
}

.pricing-features li {
    font-size: 13.5px;
    color: var(--text-main);
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

/* --------------------------------------------------------------------------
   12. FOOTER ACADÉMICO HARVARD (CRIMSON PROFUNDO & DISTINCIÓN)
   -------------------------------------------------------------------------- */
.footer-harvard {
    background: #1B1E23;
    color: #E5E7EB;
    border-top: 4px solid var(--harvard-crimson);
    padding: 60px 24px 30px 24px;
    margin-top: auto;
}

.footer-container {
    max-width: 1360px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-family: var(--font-serif);
    font-size: 16px;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 13px;
    color: #9CA3AF;
}

.footer-links a:hover {
    color: #FFFFFF;
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: #9CA3AF;
    flex-wrap: wrap;
    gap: 14px;
}

/* --------------------------------------------------------------------------
   13. ESTILOS COMPARTIDOS DEL CAMPUS, TERMINAL & BITÁCORA (WHITE & CLEAN)
   -------------------------------------------------------------------------- */
.container {
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 24px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    padding: 24px;
}

.course-hero-grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 0;
    min-height: 280px;
}

@media (max-width: 860px) {
    .course-hero-grid {
        grid-template-columns: 1fr;
    }
}

.journal-main-grid {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 24px;
    align-items: start;
}

@media (max-width: 960px) {
    .journal-main-grid {
        grid-template-columns: 1fr;
    }
}

.badge-crimson {
    background: var(--harvard-crimson-light);
    color: var(--harvard-crimson);
    border: 1px solid var(--border-crimson);
    font-size: 11px;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: var(--radius-xs);
    letter-spacing: 0.5px;
}

.badge-gold {
    background: var(--accent-gold-light);
    color: var(--accent-gold-dark);
    border: 1px solid var(--border-gold);
    font-size: 11px;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: var(--radius-xs);
}

.badge-tag {
    background: var(--bg-surface-alt);
    color: var(--text-ink);
    border: 1px solid var(--border);
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-xs);
}

/* Responsive Table Utility */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.table-responsive table {
    width: 100%;
    min-width: 580px;
}

/* --------------------------------------------------------------------------
   14. BREAKPOINTS RESPONSIVOS DE PRECISIÓN (MODERN WEB GUIDANCE)
   -------------------------------------------------------------------------- */
@media (max-width: 1180px) {
    #nav-live-ticker,
    .nav-ticker-badge {
        display: none !important;
    }
    .nav-menu {
        gap: 8px !important;
    }
    .nav-link {
        font-size: 12px !important;
        padding: 4px 4px !important;
    }
}

@media (max-width: 960px) {
    .nav-menu {
        display: none !important;
    }
    .nav-actions {
        display: none !important;
    }
    .nav-mobile-toggle {
        display: flex !important;
    }
    .harvard-course-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 20px !important;
    }
    .harvard-slider {
        min-height: 440px;
    }
    .harvard-slide-content {
        padding: clamp(24px, 4vw, 40px);
    }
    .harvard-slide-title {
        font-size: clamp(22px, 4vw, 32px) !important;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .faculty-feature-card {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 640px) {
    .container {
        padding-left: 16px !important;
        padding-right: 16px !important;
    }
    .harvard-course-grid {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr !important;
    }
    .footer-grid {
        grid-template-columns: 1fr !important;
        gap: 24px !important;
    }
    .harvard-slider {
        min-height: 400px;
    }
    .harvard-slide-content {
        padding: 24px 16px;
    }
    .harvard-slide-title {
        font-size: 21px !important;
        line-height: 1.25 !important;
    }
    .harvard-slide-desc {
        font-size: 13px !important;
        line-height: 1.5 !important;
        margin-bottom: 20px !important;
    }
    .harvard-slide-ctas {
        flex-direction: column;
        width: 100%;
        gap: 10px !important;
    }
    .harvard-slide-ctas .btn-primary,
    .harvard-slide-ctas .btn-secondary {
        width: 100%;
        text-align: center;
    }
    .section-title {
        font-size: 23px !important;
    }
    .section-desc {
        font-size: 13.5px !important;
    }
    .comparison-table-wrap {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .comparison-table {
        min-width: 580px;
        font-size: 12.5px;
    }
}

/* Interactive Utility States */
.quiz-option-btn:hover {
    border-color: var(--primary) !important;
    background: #FAF7F2 !important;
}

.symbol-btn:hover {
    border-color: var(--primary) !important;
}

.replay-speed-btn.active {
    background: var(--primary) !important;
    color: #FFFFFF !important;
    border-color: var(--primary) !important;
}