/* ========================================
   MAPLELING OFFICIAL PLATFORM - DESIGN SYSTEM
   ======================================== */

/* Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* MapleLing Official Colors */
    --color-navy: #1e3a5f;
    --color-navy-light: #2d5a87;
    --color-soft-blue: #7dd3fc;
    --color-maple-red: #dc2626;
    --color-background: #f8fafc;
    --color-surface: #ffffff;
    --color-text-primary: #1a202c;
    --color-text-secondary: #4a5568;
    --color-text-tertiary: #718096;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Radius */
    --radius-sm: 0.375rem;
    --radius-base: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   STICKY NAVIGATION
   ======================================== */

.navbar {
    position: sticky;
    top: 0;
    background: var(--color-navy);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-image {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.logo-icon {
    font-size: var(--font-size-2xl);
    color: var(--color-maple-red);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: white;
    letter-spacing: -0.025em;
}

.brand-tagline {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-soft-blue);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
    padding: var(--spacing-sm) 0;
}

.nav-link:hover {
    color: white;
}

.nav-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-base);
    font-weight: 500;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: var(--color-soft-blue);
    color: var(--color-navy);
    font-weight: 600;
}

.btn-primary:hover {
    background: white;
    color: var(--color-navy);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid white;
    font-weight: 600;
    backdrop-filter: blur(4px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: white;
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary.large, .btn-secondary.large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-base);
    border-radius: var(--radius-md);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    background: linear-gradient(135deg, var(--color-background) 0%, #e0f2fe 100%);
    padding: var(--spacing-4xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(45deg, transparent 0%, rgba(125, 211, 252, 0.1) 100%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero-content {
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.025em;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    font-weight: 400;
    line-height: 1.5;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.bookshelf-gallery {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 320px;
}

.gallery-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-navy);
    text-align: center;
    margin-bottom: 0;
}

.gallery-row {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.gallery-book {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
}

.gallery-book:hover {
    transform: translateY(-4px);
}

.gallery-cover {
    width: 70px;
    height: 95px;
    border-radius: 4px;
    object-fit: cover;
    box-shadow: 0 2px 6px rgba(0,0,0,0.12);
    transition: box-shadow 0.2s ease;
}

.gallery-book:hover .gallery-cover {
    box-shadow: 0 6px 16px rgba(0,0,0,0.25);
}

.gallery-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

/* ========================================
   MODERN CARD CAROUSEL
   ======================================== */

.carousel-section {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--color-background) 0%, #f0f9ff 100%);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.carousel-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    text-align: center;
}

.carousel-title {
    font-size: var(--font-size-5xl); /* Aumentado de 4xl a 5xl (3rem) */
    font-weight: 700; /* Más bold */
    color: var(--color-navy);
    margin-bottom: var(--spacing-lg); /* Más espacio */
    letter-spacing: -0.025em; /* Mejor espaciado */
    line-height: 1.1; /* Líneas más compactas */
}

.carousel-subtitle {
    font-size: var(--font-size-xl); /* Aumentado de lg a xl */
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-4xl);
    font-weight: 500; /* Más peso */
    line-height: 1.4; /* Mejor legibilidad */
    max-width: 600px; /* Limitar ancho para mejor lectura */
    margin-left: auto;
    margin-right: auto;
}

/* Main Carousel */
.card-carousel {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
}

.carousel-track-container {
    width: 100%;
    max-width: 900px;
    overflow: hidden;
    position: relative;
}

.carousel-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    gap: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
}

/* Carousel Arrows */
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    background: white;
    color: var(--color-navy);
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    opacity: 0.9;
}

.carousel-arrow:hover {
    opacity: 1;
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--shadow-xl);
}

.carousel-arrow:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: translateY(-50%) scale(0.9);
}

.carousel-arrow-left {
    left: -30px;
}

.carousel-arrow-right {
    right: -30px;
}

/* ========================================
   MODULE CARDS - SOLO IMAGEN + CANDADO
   ======================================== */

/* 1️⃣ CARD BASE - SOLO IMAGEN SIN FONDO */
.module-card {
    flex: 0 0 320px;
    height: 400px; /* Altura de la imagen */
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    border: 2px solid transparent;
    overflow: hidden;
    background: transparent; /* Sin fondo */
}

.module-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.module-card.active {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.module-card.inactive {
    opacity: 0.8;
    transform: scale(0.95);
}

.module-card.locked {
    opacity: 0.7;
}

.module-card.locked:hover {
    transform: translateY(-4px);
    cursor: not-allowed;
}

/* 2️⃣ HERO - AHORA OCUPA TODA LA CARD CON FONDO */
.module-card__hero {
    position: relative;
    width: 100%;
    height: 100%; /* Ocupa toda la card */
    overflow: hidden;
    border-radius: var(--radius-xl);
    background: #f8fafc; /* Fondo suave consistente */
}

/* 3️⃣ IMAGEN ENSANCHADA PARA LLENAR EL ANCHO COMPLETO */
.hero-image {
    width: 100%;
    height: 100%;
    background-size: 100% auto; /* Ensancha al 100% del ancho, altura automática */
    background-position: center center; /* Centrada perfectamente */
    background-repeat: no-repeat;
    background-color: #f8fafc; /* Fondo suave para el espacio restante */
    transition: transform var(--transition-base);
    position: relative;
    border-radius: var(--radius-xl);
    object-fit: fill; /* Para elementos img si los hubiera */
}

.module-card:hover .hero-image {
    transform: scale(1.05);
}

/* 4️⃣ ELIMINAR FADE Y MASK - YA NO NECESARIOS */
.module-card__hero::after {
    display: none;
}

.hero-image {
    -webkit-mask-image: none;
    mask-image: none;
}

/* 5️⃣ ELIMINAR BODY - YA NO SE USA */
.module-card__body {
    display: none;
}

/* VARIANTES DE IMAGEN - TODAS CON FONDO TRANSPARENTE */
.hero-image.foundations {
    background-image: url('images/Foundations.png');
}

.hero-image.basic-1 {
    background-image: url('images/Basic_book1.png');
}

.hero-image.basic-2 {
    background-image: url('images/Basic_book2.png');
}

.hero-image.basic-3 {
    background-image: url('images/Basic_book3.png');
}

.hero-image.basic-4 {
    background-image: url('images/Basic_book4.png');
}

.hero-image.basic-5 {
    background-image: url('images/Basic_book5.png');
}

.hero-image.upper-basic {
    background-image: url('images/Upperbasic_book6.png');
}

.hero-image.tef-preparation {
    background-image: url('images/tef_preparation.png');
}

.hero-image.intermediate-1 {
    background-image: url('images/intermediate_1.png');
}

.hero-image.intermediate-2 {
    background-image: url('images/intermediate_2.png');
}

/* Gradientes para cards sin imagen específica */
.hero-image.intermediate {
    background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
}

.hero-image.advanced {
    background: linear-gradient(135deg, #2d3436 0%, #636e72 100%);
}

.hero-image.profession {
    background: linear-gradient(135deg, var(--color-maple-red) 0%, #b91c1c 100%);
}

/* LOCK OVERLAY - MANTENER PARA SUSCRIPCIONES */
.module-card__hero .lock-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    color: white;
    backdrop-filter: blur(1px);
    z-index: 3;
    border-radius: var(--radius-xl);
}

/* Carousel Indicators */
.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background: var(--color-border);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot.active {
    background: var(--color-navy);
    transform: scale(1.2);
}

.carousel-dot:hover {
    background: var(--color-soft-blue);
}

/* Selected Module Info */
.selected-module-info {
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.selected-module-info.visible {
    opacity: 1;
    transform: translateY(0);
}

.start-module-btn {
    background: var(--color-navy);
    color: white;
    border: none;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-base);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-base);
}

.start-module-btn:hover {
    background: var(--color-navy-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.start-module-btn:disabled {
    background: var(--color-text-tertiary);
    cursor: not-allowed;
    transform: none;
}

/* ========================================
   MAPLE PATH GAME CTA
   ======================================== */

.game-cta-section {
    padding: var(--spacing-3xl) var(--spacing-xl);
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
}

.game-cta-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.game-cta-content {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl) var(--spacing-3xl);
    box-shadow: var(--shadow-lg);
}

.game-cta-car {
    width: 160px;
    max-width: 160px;
    height: auto;
    margin-bottom: var(--spacing-md);
}

.game-cta-title {
    font-size: var(--font-size-3xl);
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
}

.game-cta-title .beta-badge {
    display: inline-block;
    background: linear-gradient(135deg, #F59E0B, #D97706);
    color: white;
    font-size: 14px;
    font-weight: bold;
    padding: 4px 12px;
    border-radius: 12px;
    margin-left: 10px;
    vertical-align: middle;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.game-cta-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.game-cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #C41E3A, #dc2626);
    color: white;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-full);
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    box-shadow: 0 4px 15px rgba(196, 30, 58, 0.3);
}

.game-cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(196, 30, 58, 0.4);
}

/* Responsive Design - Sistema Simplificado */
@media (max-width: 1024px) {
    .subscription-comparison {
        grid-template-columns: 1fr;
        max-width: 500px;
    }
}

@media (max-width: 768px) {
    .carousel-arrow {
        display: none;
    }
    
    .carousel-track-container {
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    
    .carousel-track-container::-webkit-scrollbar {
        display: none;
    }
    
    .carousel-track {
        scroll-snap-type: x mandatory;
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .module-card {
        flex: 0 0 300px;
        height: 380px; /* Altura proporcional */
        scroll-snap-align: center;
    }
    
    .carousel-title {
        font-size: var(--font-size-4xl); /* Reducido para tablet pero aún muy grande */
    }
    
    /* Game CTA responsive */
    .game-cta-car {
        width: 100px !important;
        max-width: 100px !important;
    }
    
    .game-cta-title {
        font-size: var(--font-size-2xl);
    }
    
    .game-cta-title .beta-badge {
        font-size: 11px;
        padding: 3px 8px;
    }
}

@media (max-width: 480px) {
    .carousel-section {
        padding: var(--spacing-2xl) 0;
    }
    
    .carousel-container {
        padding: 0 var(--spacing-md);
    }
    
    .carousel-title {
        font-size: var(--font-size-3xl); /* Reducido para móvil pero aún grande */
    }
    
    .carousel-subtitle {
        font-size: var(--font-size-lg); /* Reducido para móvil */
    }
    
    .module-card {
        flex: 0 0 280px;
        height: 360px; /* Altura proporcional */
    }
    
    /* Game CTA extra small */
    .game-cta-car {
        width: 70px !important;
        max-width: 70px !important;
    }
    
    .game-cta-title {
        font-size: var(--font-size-xl);
    }
}

/* Book Cover Variants */
.book-cover.foundations {
    background: url('images/Foundations.png') center/cover;
    background-color: #1e3a5f; /* fallback color */
}

.book-cover.basic {
    background: url('images/Basic_book1.png') center/cover;
    background-color: #00b894; /* fallback color */
}

.book-cover.basic-2 {
    background: url('images/Basic_book1.png') center/cover;
    background-color: #00b894; /* fallback color */
}

.book-cover.basic-3 {
    background: url('images/Basic_book2.png') center/cover;
    background-color: #00b894; /* fallback color */
}

.book-cover.basic-4 {
    background: url('images/Basic_book3.png') center/cover;
    background-color: #00b894; /* fallback color */
}

.book-cover.basic-5 {
    background: url('images/Basic_book4.png') center/cover;
    background-color: #00b894; /* fallback color */
}

.book-cover.upper-basic {
    background: url('images/Basic_book5.png') center/cover;
    background-color: #fdcb6e; /* fallback color */
}

.book-cover.tef-preparation {
    background: url('images/tef_preparation.png') center/cover;
    background-color: #2d3436; /* fallback color */
}

.book-cover.intermediate-1 {
    background: url('images/intermediate_1.png') center/cover;
    background-color: #6c5ce7; /* fallback color */
}

.book-cover.intermediate-2 {
    background: url('images/intermediate_2.png') center/cover;
    background-color: #6c5ce7; /* fallback color */
}

.book-cover.intermediate {
    background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
}

.book-cover.intermediate-advanced {
    background: linear-gradient(135deg, #fd79a8 0%, #e84393 100%);
}

.book-cover.advanced {
    background: linear-gradient(135deg, #2d3436 0%, #636e72 100%);
}

.book-cover.profession {
    background: linear-gradient(135deg, var(--color-maple-red) 0%, #b91c1c 100%);
}

.book-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1;
}

.book-badge.free {
    background: var(--color-success);
    color: white;
}

.book-badge.subscription {
    background: var(--color-navy);
    color: white;
}

.book-badge.coming-soon {
    background: var(--color-warning);
    color: white;
}

.book-progress {
    position: absolute;
    bottom: var(--spacing-sm);
    left: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.9);
    color: var(--color-navy);
    padding: 2px var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
    line-height: 1;
}

.coming-soon-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(1px);
}

.coming-soon-text {
    background: var(--color-warning);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-base);
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.book-info {
    padding: var(--spacing-lg);
}

.book-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.book-level {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* ========================================
   CONTENT SECTIONS
   ======================================== */

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--color-navy);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

/* How It Works Section */
.how-it-works {
    padding: var(--spacing-4xl) 0;
    background: var(--color-surface);
}

.lesson-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.lesson-type {
    text-align: left;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-base);
    position: relative;
}

.lesson-type:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.lesson-type.disabled {
    opacity: 0.75;
    border: 1px solid rgba(125, 211, 252, 0.3);
}

.lesson-icon {
    font-size: 32px;
    margin-bottom: var(--spacing-md);
    display: block;
}

.lesson-type h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
}

.lesson-type p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-sm);
}

.coming-later {
    display: inline-block;
    background: var(--color-soft-blue);
    color: var(--color-navy);
    padding: 4px var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

.roadmap-note {
    background: linear-gradient(135deg, var(--color-soft-blue) 0%, rgba(125, 211, 252, 0.1) 100%);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(125, 211, 252, 0.3);
}

.roadmap-note h3 {
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.roadmap-note p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Foundation Free Box */
.foundation-free-box {
    background: linear-gradient(135deg, #10b981 0%, rgba(16, 185, 129, 0.1) 100%);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 2px solid rgba(16, 185, 129, 0.3);
    margin-top: var(--spacing-2xl);
    text-align: center;
}

.foundation-free-box h3 {
    color: var(--color-navy);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.foundation-free-box p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-md);
    max-width: 700px;
    margin: 0 auto;
}

.foundation-free-box strong {
    color: #10b981;
    font-weight: 700;
}

/* Skills Section */
.skills {
    padding: var(--spacing-4xl) 0;
}

/* Hub Layout for Skills */
.skills-hub-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3xl);
    margin-top: var(--spacing-3xl);
    position: relative;
}

.skills-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    flex: 1;
    max-width: 320px;
}

.skills-center-visual {
    flex-shrink: 0;
    width: 280px;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.center-brand-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0.5;
    filter: blur(0px);
}

.skill-card {
    text-align: left;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-base);
    position: relative;
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.skill-card.coming-soon {
    opacity: 0.75;
    border: 1px solid rgba(125, 211, 252, 0.3);
}

.skill-icon {
    font-size: 32px;
    margin-bottom: var(--spacing-md);
    display: block;
}

.skill-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
}

.skill-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-sm);
}

.skill-badge {
    display: inline-block;
    margin-top: var(--spacing-sm);
    background: var(--color-soft-blue);
    color: var(--color-navy);
    padding: 4px var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
}

/* Subscription Section */
.subscription {
    padding: var(--spacing-4xl) 0;
    background: var(--color-surface);
}

.subscription-comparison {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.plan-card {
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: left;
    transition: all var(--transition-base);
    position: relative;
}

.plan-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.plan-card.featured {
    border-color: var(--color-navy);
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
}

.plan-card.professional {
    border-color: #7c3aed;
    background: linear-gradient(135deg, #faf5ff 0%, #ffffff 100%);
}

.plan-card.annual-founder {
    border-color: #fbbf24;
    background: linear-gradient(135deg, #fffbeb 0%, #ffffff 100%);
    box-shadow: var(--shadow-md);
}

.plan-card.workplace {
    border-color: #c084fc;
    background: linear-gradient(135deg, #faf5ff 0%, #ffffff 100%);
}

.plan-badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

.free-badge {
    background: #dcfce7;
    color: #166534;
}

.subscribe-badge {
    background: #dbeafe;
    color: #1e40af;
}

.professional-badge {
    background: #f3e8ff;
    color: #6b21a8;
}

.annual-badge {
    background: #fef3c7;
    color: #92400e;
}

.workplace-badge {
    background: #fae8ff;
    color: #86198f;
}

.plan-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--color-border-light);
}

.plan-intro-offer {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    padding: var(--spacing-md);
    border-radius: var(--radius-base);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    border: 2px solid #fbbf24;
}

.intro-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: #92400e;
    margin-bottom: var(--spacing-xs);
}

.intro-price {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: #92400e;
}

.plan-price {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.price-amount {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-navy);
}

.price-period {
    font-size: var(--font-size-base);
    color: var(--color-text-tertiary);
}

.plan-price-alt {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.plan-renewal-note {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    font-style: italic;
}

.plan-requirement {
    background: #fef2f2;
    border: 2px solid #fecaca;
    border-radius: var(--radius-base);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.plan-requirement h4 {
    color: #991b1b;
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
}

.plan-requirement p {
    color: #7f1d1d;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.requirement-note {
    font-size: var(--font-size-xs);
    color: #991b1b;
    font-style: italic;
}

.plan-features {
    margin-bottom: var(--spacing-2xl);
}

.plan-features h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-lg);
}

.feature-group {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-light);
}

.feature-group:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.feature {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-primary);
    font-weight: 500;
    line-height: 1.6;
}

.feature-detail {
    padding: var(--spacing-xs) 0 var(--spacing-xs) var(--spacing-lg);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.feature-note {
    padding: var(--spacing-md);
    background: var(--color-background);
    border-radius: var(--radius-base);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-style: italic;
    margin-top: var(--spacing-md);
}

.plan-button {
    width: 100%;
    padding: var(--spacing-lg);
    background: var(--color-navy);
    color: white;
    border: none;
    border-radius: var(--radius-base);
    font-weight: 600;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    text-decoration: none;
    display: block;
    white-space: normal;
    line-height: 1.5;
}

.plan-button:hover {
    background: var(--color-navy-light);
    transform: translateY(-2px);
}

.plan-card.professional .plan-button {
    background: linear-gradient(135deg, #7c3aed 0%, #6b21a8 100%);
}

.plan-card.professional .plan-button:hover {
    background: linear-gradient(135deg, #6b21a8 0%, #581c87 100%);
}

.plan-card.workplace .plan-button {
    background: linear-gradient(135deg, #c084fc 0%, #a855f7 100%);
}

.plan-card.workplace .plan-button:hover {
    background: linear-gradient(135deg, #a855f7 0%, #9333ea 100%);
}

.plan-card.annual-founder .plan-button {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #78350f;
    font-weight: 700;
}

.plan-card.annual-founder .plan-button:hover {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

/* Founder-specific elements */
.founder-trust-badge {
    background: linear-gradient(135deg, #10b981 0%, rgba(16, 185, 129, 0.2) 100%);
    padding: var(--spacing-md);
    border-radius: var(--radius-base);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: #065f46;
    text-align: center;
    margin-top: var(--spacing-md);
    border: 2px solid rgba(16, 185, 129, 0.3);
}

.urgency-notice {
    background: linear-gradient(135deg, #fef3c7 0%, rgba(251, 191, 36, 0.2) 100%);
    padding: var(--spacing-md);
    border-radius: var(--radius-base);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: #92400e;
    text-align: center;
    margin-top: var(--spacing-md);
    border: 2px solid rgba(251, 191, 36, 0.3);
}

/* Coming Soon Plans Section */
.coming-soon-plans {
    margin-top: var(--spacing-4xl);
    padding-top: var(--spacing-3xl);
    border-top: 2px solid var(--color-border-light);
}

.coming-soon-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-navy);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.coming-soon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.coming-soon-card {
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    opacity: 0.7;
    position: relative;
}

.coming-soon-badge {
    display: inline-block;
    background: var(--color-warning);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.coming-soon-card h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.coming-soon-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

.coming-soon-card.spanish-highlight {
    opacity: 1;
    border-color: var(--color-navy);
    background: linear-gradient(135deg, #dbeafe 0%, #eff6ff 100%);
}

.coming-soon-card.spanish-highlight .coming-soon-badge {
    background: var(--color-navy);
}

.coming-soon-date {
    font-size: var(--font-size-sm);
    font-style: italic;
    color: var(--color-text-tertiary);
    margin-top: var(--spacing-xs);
}

.progression-note {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 2px solid #bae6fd;
    margin-top: var(--spacing-3xl);
}

.progression-note h3 {
    color: var(--color-navy);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    font-size: var(--font-size-2xl);
}

.progression-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.progression-step {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-sm);
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.progression-step strong {
    color: var(--color-navy);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.progression-arrow {
    font-size: var(--font-size-2xl);
    color: var(--color-navy);
    font-weight: bold;
}

.billing-info {
    background: var(--color-background);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    margin-top: var(--spacing-2xl);
    text-align: center;
}

.billing-info h3 {
    color: var(--color-navy);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
}

.billing-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

.billing-item {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-base);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    box-shadow: var(--shadow-sm);
    text-align: left;
}

.content-note {
    background: var(--color-background);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.content-note h4 {
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.content-note p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* FAQ Section */
.faq {
    padding: var(--spacing-4xl) 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-xl) 0;
    background: none;
    border: none;
    text-align: left;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-navy);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-navy-light);
}

.faq-answer {
    padding-bottom: var(--spacing-xl);
    display: none;
}

.faq-answer.open {
    display: block;
}

.faq-answer p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.faq-answer p + p {
    margin-top: var(--spacing-md);
}

.faq-answer ul {
    margin-top: var(--spacing-md);
    margin-left: var(--spacing-xl);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.faq-answer ul li {
    margin-bottom: var(--spacing-sm);
}

.faq-answer strong {
    color: var(--color-navy);
    font-weight: 600;
}

/* Footer */
.footer {
    background: var(--color-navy);
    color: white;
    padding: var(--spacing-4xl) 0 var(--spacing-2xl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.footer-brand {
    margin-bottom: var(--spacing-3xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-logo .brand-tagline {
    color: var(--color-soft-blue);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.footer-column h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-soft-blue);
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-xl);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
    color: var(--color-soft-blue);
    text-decoration: none;
}

/* ========================================
   MODAL
   ======================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    margin: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
}

.modal-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
    z-index: 1;
}

.modal-close:hover {
    color: var(--color-text-primary);
}

.modal-body {
    padding: var(--spacing-2xl);
}

.book-detail-header {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.book-cover-large {
    width: 200px;
    height: 280px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: var(--font-size-lg);
    text-align: center;
    position: relative;
}

.book-cover-large.foundations {
    background: url('images/Foundations.png') center/cover;
    background-color: #1e3a5f; /* fallback color */
}

.book-cover-large.basic-1 {
    background: url('images/Basic_book1.png') center/cover;
    background-color: #00b894; /* fallback color */
}

.book-cover-large.basic-2 {
    background: url('images/Basic_book2.png') center/cover;
    background-color: #00b894; /* fallback color */
}

.book-cover-large.basic-3 {
    background: url('images/Basic_book3.png') center/cover;
    background-color: #00b894; /* fallback color */
}

.book-cover-large.basic-4 {
    background: url('images/Basic_book4.png') center/cover;
    background-color: #00b894; /* fallback color */
}

.book-cover-large.basic-5 {
    background: url('images/Basic_book5.png') center/cover;
    background-color: #00b894; /* fallback color */
}

.book-cover-large.upper-basic {
    background: url('images/Upperbasic_book6.png') center/cover;
    background-color: #fdcb6e; /* fallback color */
}

.book-cover-large.tef-preparation {
    background: url('images/tef_preparation.png') center/cover;
    background-color: #2d3436; /* fallback color */
}

.book-cover-large.intermediate-1 {
    background: url('images/intermediate_1.png') center/cover;
    background-color: #6c5ce7; /* fallback color */
}

.book-cover-large.intermediate-2 {
    background: url('images/intermediate_2.png') center/cover;
    background-color: #6c5ce7; /* fallback color */
}

.book-cover-large.intermediate {
    background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
}

.book-cover-large.advanced {
    background: linear-gradient(135deg, #2d3436 0%, #636e72 100%);
}

.book-cover-large.profession {
    background: linear-gradient(135deg, var(--color-maple-red) 0%, #b91c1c 100%);
}

.book-detail-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
}

.book-detail-level {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.book-detail-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
}

.book-actions {
    margin-bottom: var(--spacing-xl);
}

.book-detail-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-navy);
    margin: var(--spacing-xl) 0 var(--spacing-lg);
}

.learning-objectives {
    list-style: none;
    padding: 0;
}

.learning-objectives li {
    padding: var(--spacing-sm) 0;
    color: var(--color-text-secondary);
    position: relative;
    padding-left: var(--spacing-xl);
}

.learning-objectives li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

.skill-badges {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.skill-badge {
    background: var(--color-soft-blue);
    color: var(--color-navy);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.foundations-special {
    background: var(--color-background);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xl);
}

/* Spanish Version Card */
.spanish-version-card {
    background: linear-gradient(135deg, #dbeafe 0%, #eff6ff 100%);
    border: 2px solid var(--color-navy);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    text-align: center;
}

.spanish-version-card h3 {
    color: var(--color-navy);
    font-size: var(--font-size-lg);
    margin: 0 0 var(--spacing-sm) 0;
}

.spanish-version-card p {
    color: var(--color-text-secondary);
    margin: 0 0 var(--spacing-xs) 0;
    font-size: var(--font-size-base);
}

.spanish-version-card .spanish-date {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-navy);
}

.spanish-version-card .spanish-note {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    font-style: italic;
}

.activity-list {
    list-style: none;
    padding: 0;
}

.activity-list li {
    padding: var(--spacing-sm) 0;
    color: var(--color-text-secondary);
    position: relative;
    padding-left: var(--spacing-xl);
}

.activity-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-navy);
    font-weight: bold;
}

.foundations-note {
    background: var(--color-soft-blue);
    color: var(--color-navy);
    padding: var(--spacing-lg);
    border-radius: var(--radius-base);
    margin-top: var(--spacing-lg);
    font-style: italic;
}

/* ========================================
   TOAST NOTIFICATIONS
   ======================================== */

.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-navy);
    color: white;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-xl);
    z-index: 3000;
    opacity: 0;
    transition: all var(--transition-base);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast-message {
    font-weight: 500;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--spacing-lg);
    }
    
    .nav-menu {
        display: none;
    }
    
    .nav-actions {
        gap: var(--spacing-sm);
    }
    
    .btn-primary, .btn-secondary {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-xs);
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .hero {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero-actions {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .bookshelf-container {
        padding: 0 var(--spacing-lg);
    }
    
    .carousel-track {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .book-card {
        width: 160px;
    }
    
    .book-cover {
        height: 220px;
    }
    
    .book-badge {
        font-size: 9px;
        padding: 2px 6px;
    }
    
    .book-progress {
        font-size: 9px;
        padding: 2px 4px;
    }
    
    .section-container {
        padding: 0 var(--spacing-lg);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-subtitle {
        font-size: var(--font-size-base);
    }
    
    .lesson-types,
    .skills-hub-layout {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .skills-column {
        max-width: 100%;
    }
    
    .skills-center-visual {
        order: -1;
        width: 150px;
        height: 150px;
        margin: var(--spacing-md) auto;
    }
    
    .subscription-comparison {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .coming-soon-grid {
        grid-template-columns: 1fr;
    }
    
    .plan-card {
        padding: var(--spacing-xl);
    }
    
    .plan-card.featured {
        transform: none;
        box-shadow: var(--shadow-base);
    }
    
    .price-amount {
        font-size: var(--font-size-2xl);
    }
    
    .progression-steps {
        flex-direction: column;
    }
    
    .progression-arrow {
        transform: rotate(90deg);
    }
    
    .progression-step {
        min-width: auto;
        width: 100%;
    }
    
    .billing-details {
        grid-template-columns: 1fr;
    }
    
    .plan-intro-offer {
        padding: var(--spacing-sm);
    }
    
    .intro-price {
        font-size: var(--font-size-lg);
    }
    
    /* Footer responsive */
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .footer-brand {
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    /* Modal responsive */
    .book-detail-header {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .book-cover-large {
        margin: 0 auto;
        width: 160px;
        height: 220px;
    }
    
    /* FAQ responsive */
    .faq-question {
        font-size: var(--font-size-base);
        padding: var(--spacing-lg) 0;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 var(--spacing-md);
        height: 60px;
    }
    
    .logo-image {
        height: 28px;
    }
    
    .brand-name {
        font-size: var(--font-size-base);
    }
    
    .brand-tagline {
        font-size: 9px;
    }
    
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .btn-primary.large,
    .btn-secondary.large {
        width: 100%;
        max-width: 300px;
        padding: var(--spacing-md) var(--spacing-xl);
    }
    
    .bookshelf-container {
        padding: 0 var(--spacing-md);
    }
    
    .book-card {
        width: 140px;
    }
    
    .book-cover {
        height: 200px;
    }
    
    .book-badge {
        font-size: 8px;
        padding: 1px 4px;
        top: 4px;
        right: 4px;
    }
    
    .book-progress {
        font-size: 8px;
        padding: 1px 3px;
        bottom: 4px;
        left: 4px;
    }
    
    .section-container {
        padding: 0 var(--spacing-md);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .carousel-title {
        font-size: var(--font-size-2xl);
    }
    
    .carousel-subtitle {
        font-size: var(--font-size-base);
    }
    
    .plan-card {
        padding: var(--spacing-lg);
    }
    
    .price-amount {
        font-size: var(--font-size-xl);
    }
    
    .foundation-free-box {
        padding: var(--spacing-lg);
    }
    
    .progression-note {
        padding: var(--spacing-lg);
    }
    
    .billing-info {
        padding: var(--spacing-lg);
    }
    
    .modal-content {
        margin: var(--spacing-md);
        max-height: 90vh;
    }
    
    .book-cover-large {
        width: 140px;
        height: 190px;
    }
}