/* ===================================
   DETALLE CURSO - DISEÑO MODERNO
   Versión completamente nueva
   CSS CARGADO CORRECTAMENTE ✅
=================================== */

/* Variables CSS */
:root {
    /* Colores principales */
    --primary-purple: #6f42c1;
    --primary-blue: #0d6efd;
    --gradient-primary: linear-gradient(135deg, #6f42c1, #0d6efd);
    --gradient-secondary: linear-gradient(135deg, #667eea, #764ba2);
    --gradient-bg: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    
    /* Colores de estado */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* Colores neutros */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Tipografía */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-secondary: 'Outfit', sans-serif;
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Animaciones */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1010;
    --z-fixed: 1020;
    --z-modal-backdrop: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
}

/* Reset y base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    max-width: 100vw;
}

body {
    font-family: var(--font-primary) !important;
    background: var(--gradient-bg) !important;
    color: var(--gray-800) !important;
    line-height: 1.6 !important;
    overflow-x: hidden !important;
    margin: 0 !important;
    padding: 0 !important;
    width: 100% !important;
    max-width: 100vw !important;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: var(--white);
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.loading-content p {
    opacity: 0.8;
    font-size: 0.9rem;
}

/* Main Content */
.main-content {
    margin-left: 280px;
    min-height: 100vh;
    position: relative;
    width: calc(100% - 280px);
    max-width: calc(100vw - 280px);
    overflow-x: hidden;
}

@media (max-width: 768px) {
    .main-content {
        margin-left: 0 !important;
        width: 100% !important;
        max-width: 100vw !important;
        padding: 0 !important;
        overflow-x: hidden;
    }
}

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    z-index: 1;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: float 6s ease-in-out infinite;
}

.hero-waves {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120' preserveAspectRatio='none'%3E%3Cpath d='M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z' opacity='.25' fill='%23ffffff'%3E%3C/path%3E%3Cpath d='M0,0V15.81C13,36.92,27.64,56.86,47.69,72.05,99.41,111.27,165,111,224.58,91.58c31.15-10.15,60.09-26.07,89.67-39.8,40.92-19,84.73-46,130.83-49.67,36.26-2.85,70.9,9.42,98.6,31.56,31.77,25.39,62.32,62,103.63,73,40.44,10.79,81.35-6.69,119.13-24.28s75.16-39,116.92-43.05c59.73-5.85,113.28,22.88,168.9,38.84,30.2,8.66,59,6.17,87.09-7.5,22.43-10.89,48-26.93,60.65-49.24V0Z' opacity='.5' fill='%23ffffff'%3E%3C/path%3E%3Cpath d='M0,0V5.63C149.93,59,314.09,71.32,475.83,42.57c43-7.64,84.23-20.12,127.61-26.46,59-8.63,112.48,12.24,165.56,35.4C827.93,77.22,886,95.24,951.2,90c86.53-7,172.46-45.71,248.8-84.81V0Z' fill='%23ffffff'%3E%3C/path%3E%3C/svg%3E") repeat-x;
    background-size: 1200px 100px;
    animation: wave 10s linear infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

@keyframes wave {
    0% { background-position-x: 0; }
    100% { background-position-x: 1200px; }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: var(--spacing-xl);
}

.course-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-description {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-meta {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.meta-item i {
    font-size: 1.1rem;
}

/* Course Grid */
.course-grid {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--spacing-3xl);
    position: relative;
    z-index: 10;
    margin-top: -50px;
}

@media (max-width: 1024px) {
    .course-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        margin-top: 0;
    }
}

/* Content Cards */
.content-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    margin-bottom: var(--spacing-2xl);
}

.card-header {
    padding: var(--spacing-2xl);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.card-header h2 i {
    color: var(--primary-purple);
}

.content-stats {
    display: flex;
    gap: var(--spacing-lg);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--gray-600);
    font-weight: 500;
}

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

/* Learning Grid */
.learning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.learning-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: var(--transition-normal);
}

.learning-item:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.learning-item i {
    color: var(--success);
    font-size: 1.2rem;
    margin-top: 2px;
}

.learning-item span {
    color: var(--gray-700);
    font-weight: 500;
    line-height: 1.5;
}

/* Video Curriculum */
.video-curriculum {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.curriculum-item {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-normal);
}

.curriculum-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.curriculum-item.unlocked {
    border-color: var(--success);
}

.curriculum-item.locked {
    border-color: var(--gray-300);
    opacity: 0.8;
}

.curriculum-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-xl);
    cursor: pointer;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    transition: var(--transition-normal);
}

.curriculum-header:hover {
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-50) 100%);
}

.curriculum-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.curriculum-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--white);
}

.curriculum-item.unlocked .curriculum-icon {
    background: var(--gradient-primary);
}

.curriculum-item.locked .curriculum-icon {
    background: var(--gray-400);
}

.curriculum-info h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-xs);
}

.curriculum-duration {
    font-size: 0.9rem;
    color: var(--gray-600);
    font-weight: 500;
}

.curriculum-toggle {
    color: var(--gray-500);
    transition: var(--transition-fast);
}

.curriculum-item.expanded .curriculum-toggle {
    transform: rotate(180deg);
}

.curriculum-content {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    display: none;
}

.curriculum-item.expanded .curriculum-content {
    display: block;
}

.video-preview {
    background: var(--gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
}

.video-preview p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.btn-play-preview {
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.btn-play-preview:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.video-locked {
    background: var(--gray-100);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    color: var(--gray-600);
}

.video-locked i {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--gray-400);
}

.empty-curriculum {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--gray-500);
}

.empty-curriculum i {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    color: var(--gray-300);
}

/* Course Sidebar */
.course-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    position: sticky;
    top: var(--spacing-2xl);
    height: fit-content;
}

@media (max-width: 1024px) {
    .course-sidebar {
        position: static;
        order: -1;
    }
}

/* Preview Card */
.preview-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
}

.preview-image {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.preview-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.preview-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.preview-image:hover .preview-overlay {
    opacity: 1;
}

.preview-image:hover img {
    transform: scale(1.05);
}

.btn-preview {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    color: var(--gray-800);
    border: none;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: var(--transition-normal);
}

.btn-preview:hover {
    background: var(--white);
    transform: scale(1.05);
}

/* Price Section */
.price-section {
    padding: var(--spacing-2xl);
    text-align: center;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.price-main {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-sm);
    font-weight: 800;
    color: var(--primary-purple);
}

.currency {
    font-size: 1.5rem;
}

.amount {
    font-size: 3rem;
    line-height: 1;
}

.currency-code {
    font-size: 1.2rem;
    color: var(--gray-600);
    font-weight: 600;
}

/* Purchase Section */
.purchase-section {
    padding: var(--spacing-2xl);
}

.btn-purchase {
    width: 100%;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.btn-purchase::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.btn-purchase:hover::before {
    left: 100%;
}

.btn-purchase:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-2xl);
}

.btn-purchased {
    width: 100%;
    background: var(--success);
    color: var(--white);
    border: none;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    cursor: not-allowed;
    opacity: 0.8;
}

/* Features Card */
.features-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.features-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.features-card h3 i {
    color: var(--primary-purple);
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.feature-item:hover {
    background: var(--gray-100);
    transform: translateX(4px);
}

.feature-item i {
    color: var(--primary-blue);
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.feature-item span {
    font-weight: 500;
    color: var(--gray-700);
}

/* Duration Card */
.duration-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.duration-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.duration-card h3 i {
    color: var(--primary-purple);
}

.duration-badge {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    border: 2px solid;
    position: relative;
    overflow: hidden;
}

.duration-badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    animation: shimmer 2s ease-in-out infinite;
}

.duration-badge.lifetime {
    border-color: var(--success);
    background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 100%);
}

.duration-badge.lifetime::before {
    background: linear-gradient(90deg, var(--success), #34d399, var(--success));
}

.duration-badge.limited {
    border-color: var(--warning);
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
}

.duration-badge.limited::before {
    background: linear-gradient(90deg, var(--warning), #fbbf24, var(--warning));
}

.duration-badge.unlimited {
    border-color: var(--info);
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
}

.duration-badge.unlimited::before {
    background: linear-gradient(90deg, var(--info), #60a5fa, var(--info));
}

.duration-badge i {
    font-size: 1.5rem;
    margin-top: var(--spacing-xs);
}

.duration-badge.lifetime i {
    color: var(--success);
}

.duration-badge.limited i {
    color: var(--warning);
}

.duration-badge.unlimited i {
    color: var(--info);
}

.duration-info strong {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-sm);
}

.duration-info p {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.5;
    margin: 0;
}

/* Video Modal */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.video-modal.active,
.video-modal.show {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 1000px;
    background: var(--white);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(50px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-500);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.modal-body {
    padding: 0;
}

.video-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
}

.video-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-meta {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .meta-item {
        justify-content: center;
    }
    
    .course-grid {
        padding: var(--spacing-lg);
        margin: 0;
        max-width: 100%;
        width: 100%;
        overflow-x: hidden;
    }
    
    .card-header {
        padding: var(--spacing-lg);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .card-body {
        padding: var(--spacing-lg);
    }
    
    .learning-grid {
        grid-template-columns: 1fr;
    }
    
    .curriculum-header {
        padding: var(--spacing-md);
    }
    
    .curriculum-content {
        padding: 0 var(--spacing-md) var(--spacing-md);
    }
    
    .preview-card,
    .features-card,
    .duration-card {
        margin: 0;
    }
    
    .modal-content {
        margin: var(--spacing-md);
        width: calc(100% - 2rem);
    }
    
    .modal-header {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .hero-content {
        padding: var(--spacing-lg);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .course-grid {
        padding: var(--spacing-md);
    }
    
    .price-main .amount {
        font-size: 2.5rem;
    }
    
    .btn-purchase,
    .btn-purchased {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }
}

/* Animations */
@keyframes shimmer {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* Focus states */
.btn-play-preview:focus,
.btn-purchase:focus,
.btn-preview:focus,
.modal-close:focus {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background: var(--primary-purple);
    color: var(--white);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* ===================================
   ESTILOS MIGRADOS DESDE HTML
=================================== */

/* Layout principal */
body { 
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%) !important;
    font-family: 'Inter', sans-serif !important;
}

.hero-section { 
    background: linear-gradient(135deg, #6f42c1, #0d6efd) !important;
    color: white !important;
    padding: 4rem 2rem !important;
    text-align: center !important;
}

.course-grid {
    display: grid !important;
    grid-template-columns: 1fr 400px !important;
    gap: 3rem !important;
    max-width: 1400px !important;
    margin: 0 auto !important;
    padding: 2rem !important;
}

.content-card, .preview-card, .features-card, .duration-card {
    background: white !important;
    border-radius: 1.5rem !important;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1) !important;
    padding: 2rem !important;
    margin-bottom: 2rem !important;
}

/* Estados de video */
.video-loading, .video-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
    background: #f8f9fa;
    border-radius: 12px;
    color: #6c757d;
}

.video-error i {
    font-size: 3rem;
    color: #dc3545;
    margin-bottom: 1rem;
}

.video-error button {
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

/* Estilos para métodos de pago */
.payment-methods-title {
    margin-bottom: 1rem;
    text-align: center;
}

.payment-methods-title h4 {
    color: #495057;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.payment-methods-title i {
    color: #6f42c1;
    margin-right: 0.5rem;
}

.payment-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-payment {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    width: 100%;
}

.btn-payment:hover {
    border-color: #6f42c1;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(111, 66, 193, 0.15);
}

.flow-payment:hover {
    border-color: #17a2b8;
    box-shadow: 0 8px 20px rgba(23, 162, 184, 0.15);
}

.paypal-payment:hover {
    border-color: #0070ba;
    box-shadow: 0 8px 20px rgba(0, 112, 186, 0.15);
}

.payment-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.payment-info i {
    font-size: 1.5rem;
    width: 24px;
}

.flow-payment .payment-info i {
    color: #17a2b8;
}

.paypal-payment .payment-info i {
    color: #0070ba;
}

.payment-details {
    display: flex;
    flex-direction: column;
}

.payment-name {
    font-weight: 600;
    color: #343a40;
    font-size: 1rem;
}

.payment-desc {
    font-size: 0.85rem;
    color: #6c757d;
    margin-top: 2px;
}

.payment-price {
    font-weight: 700;
    color: #28a745;
    font-size: 1.1rem;
}

/* Estilos para el botón simple de video */
.preview-video-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    padding: 24px;
    color: white;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.video-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.video-icon i {
    font-size: 2.5rem;
    color: #fff;
    opacity: 0.9;
}

.video-details h4 {
    margin: 0 0 4px 0;
    font-size: 1.2rem;
    font-weight: 600;
}

.video-duration {
    font-size: 0.9rem;
    opacity: 0.8;
}

.preview-text {
    margin: 4px 0 0 0;
    font-size: 0.85rem;
    opacity: 0.7;
}

.btn-simple-play {
    background: #fff;
    color: #667eea;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-simple-play:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

/* Modal Video - CSS fijo */
.video-modal {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    z-index: 9999 !important;
    display: none !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 1.5rem !important;
    background: rgba(0, 0, 0, 0.8) !important;
}

.video-modal.show {
    display: flex !important;
}

.modal-content {
    position: relative !important;
    width: 100% !important;
    max-width: 1000px !important;
    background: white !important;
    border-radius: 1rem !important;
    overflow: hidden !important;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25) !important;
}

.modal-header {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    padding: 1.5rem 2rem !important;
    background: #f8f9fa !important;
    border-bottom: 1px solid #dee2e6 !important;
}

.modal-header h3 {
    font-size: 1.25rem !important;
    font-weight: 600 !important;
    color: #1e293b !important;
    margin: 0 !important;
}

.modal-close {
    background: none !important;
    border: none !important;
    font-size: 1.5rem !important;
    color: #6b7280 !important;
    cursor: pointer !important;
    padding: 0.5rem !important;
    border-radius: 0.5rem !important;
    transition: all 0.2s ease !important;
}

.modal-close:hover {
    background: #e5e7eb !important;
    color: #374151 !important;
}

.modal-body {
    padding: 0 !important;
}

.video-container {
    position: relative !important;
    width: 100% !important;
    aspect-ratio: 16/9 !important;
}

.video-container iframe {
    width: 100% !important;
    height: 100% !important;
    border: none !important;
}

/* Responsive design */
@media (max-width: 1024px) {
    .course-grid {
        grid-template-columns: 1fr !important;
    }
}

@media (max-width: 768px) {
    .payment-options {
        gap: 0.75rem;
    }
    
    .btn-payment {
        padding: 0.75rem;
    }
    
    .payment-info {
        gap: 0.75rem;
    }
    
    .payment-info i {
        font-size: 1.25rem;
    }
    
    .payment-name {
        font-size: 0.9rem;
    }
    
    .payment-desc {
        font-size: 0.8rem;
    }
    
    .payment-price {
        font-size: 1rem;
    }
}

/* ====== PREVENCIÓN DE OVERFLOW HORIZONTAL ====== */
/* Aplicar a todos los elementos principales */
.main-content,
.hero-section,
.course-grid,
.course-main,
.course-sidebar,
.content-card,
.preview-card,
.features-card,
.duration-card {
    overflow-x: hidden !important;
    max-width: 100% !important;
}

/* Específico para móvil */
@media (max-width: 768px) {
    /* Botón hamburger */
    .hamburger-nuevo {
        position: fixed !important;
        top: 20px !important;
        left: 20px !important;
        z-index: 1002 !important;
        background: rgba(99, 102, 241, 0.9) !important;
        color: white !important;
        border: none !important;
        border-radius: 50% !important;
        width: 45px !important;
        height: 45px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3) !important;
        backdrop-filter: blur(10px) !important;
        -webkit-backdrop-filter: blur(10px) !important;
    }
    
    /* Asegurar que ningún elemento cause overflow */
    * {
        max-width: 100vw !important;
    }
    
    /* Contenedores principales */
    .main-content,
    .hero-section,
    .course-grid,
    .content-card,
    .preview-card {
        width: 100% !important;
        max-width: 100% !important;
        overflow-x: hidden !important;
        box-sizing: border-box !important;
    }
    
    /* Prevenir que imágenes u otros elementos causen overflow */
    img, iframe, video, .video-container {
        max-width: 100% !important;
        height: auto !important;
    }
    
    /* Asegurar que el body y html no tengan overflow horizontal */
    html, body {
        overflow-x: hidden !important;
        max-width: 100vw !important;
        position: relative !important;
    }
    
    /* Cuando el sidebar está abierto */
    body.sidebar-open {
        overflow: hidden !important;
        position: fixed !important;
        width: 100% !important;
        height: 100% !important;
        touch-action: none !important;
    }
}