/* Optimized CSS Variables */
:root {
  /* Orange Palette - More refined */
  --primary-orange: #F39C12;
  --primary-orange-light: #FFB347;
  --primary-orange-dark: #E67E22;
  --accent-orange: #FF8C42;
  --secondary-orange: #FFEAA7;
  
  /* Neutral colors with better contrast */
  --white: #FFFFFF;
  --gray-50: #FAFAFA;
  --gray-100: #F5F5F5;
  --gray-200: #E5E5E5;
  --gray-300: #D4D4D4;
  --gray-400: #A3A3A3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --gray-800: #262626;
  --gray-900: #171717;
  
  /* Semantic colors */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;
  
  /* Background gradients */
  --bg-gradient-primary: linear-gradient(135deg, #FFF8F0 0%, #FFFFFF 100%);
  --bg-gradient-card: linear-gradient(135deg, #FFFFFF 0%, #FEFEFE 100%);
  --bg-gradient-sidebar: linear-gradient(180deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
  
  /* Shadows with better performance */
  --shadow-xs: 0 1px 2px 0 rgba(243, 156, 18, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(243, 156, 18, 0.1), 0 1px 2px -1px rgba(243, 156, 18, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(243, 156, 18, 0.1), 0 2px 4px -2px rgba(243, 156, 18, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(243, 156, 18, 0.1), 0 4px 6px -4px rgba(243, 156, 18, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(243, 156, 18, 0.1), 0 8px 10px -6px rgba(243, 156, 18, 0.1);
  
  /* Border radius system */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Spacing system */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Typography scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  
  /* Transitions - Hardware accelerated */
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--bg-gradient-primary);
    min-height: 100vh;
}

/* Header */
.header {
    background: var(--bg-gradient-sidebar);
    color: var(--white);
    padding: 1.5rem 0;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.05"><circle cx="30" cy="30" r="4"/></g></svg>') repeat;
    pointer-events: none;
}

.header h1 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
}

.header nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.header nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header nav a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

/* Course Detail Header */
.course-detail-header {
    background: var(--bg-gradient-card);
    padding: 3rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.course-detail-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-orange), var(--accent-orange), var(--success));
}

.course-detail-header h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-orange-dark), var(--primary-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.course-detail-header p {
    font-size: 1.25rem;
    color: var(--gray-600);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Course Detail Content */
.course-detail-content {
    background: var(--bg-gradient-card);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

/* Course Meta */
.course-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--secondary-orange);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.course-meta > div {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.course-meta > div:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.course-meta strong {
    font-weight: 600;
    color: var(--primary-orange-dark);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.course-meta span {
    font-size: 1.125rem;
    color: var(--gray-800);
    font-weight: 500;
}

/* Section Headings */
.course-detail-content h2 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: 2rem 0 1rem 0;
    position: relative;
    padding-left: 1rem;
}

.course-detail-content h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-orange), var(--accent-orange));
    border-radius: 2px;
}

.course-detail-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--gray-600);
    margin-bottom: 2rem;
}

/* Buttons */
.enroll-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-orange-dark));
    color: var(--white);
    padding: 1rem 2.5rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    text-align: center;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
    border: none;
    cursor: pointer;
    margin: 1rem 0;
    position: relative;
    overflow: hidden;
}

.enroll-button::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: left 0.5s;
}

.enroll-button:hover::before {
    left: 100%;
}

.enroll-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(243, 156, 18, 0.4);
    background: linear-gradient(135deg, var(--primary-orange-light), var(--primary-orange));
}

.enroll-button:active {
    transform: translateY(-1px);
}

/* Already enrolled button style */
.enroll-button[style*="background-color: #6c757d"] {
    background: linear-gradient(135deg, var(--gray-500), var(--gray-600)) !important;
    cursor: default;
}

.enroll-button[style*="background-color: #6c757d"]:hover {
    background: linear-gradient(135deg, var(--gray-500), var(--gray-600)) !important;
    transform: none;
    box-shadow: var(--shadow-md);
}

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary-orange-dark);
    text-decoration: none;
    font-weight: 500;
    margin-top: 2rem;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--secondary-orange);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    background: var(--secondary-orange);
}

.back-link::before {
    content: '←';
    margin-right: 0.5rem;
    font-size: 1.25rem;
    transition: var(--transition-normal);
}

.back-link:hover {
    background: var(--primary-orange-light);
    border-color: var(--primary-orange);
    transform: translateX(-5px);
}

.back-link:hover::before {
    transform: translateX(-3px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        margin: 1rem auto;
        padding: 0 1rem;
    }

    .header h1 {
        font-size: 2rem;
    }

    .header nav {
        gap: 1rem;
    }

    .header nav a {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    .course-detail-header {
        padding: 2rem 1.5rem;
    }

    .course-detail-header h1 {
        font-size: 2rem;
    }

    .course-detail-header p {
        font-size: 1rem;
    }

    .course-detail-content {
        padding: 1.5rem;
    }

    .course-meta {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 1.5rem;
    }

    .enroll-button {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .header nav {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }

    .course-detail-header h1 {
        font-size: 1.75rem;
        line-height: 1.3;
    }

    .course-meta > div {
        padding: 0.75rem;
    }
}

/* Animation for page load */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.course-detail-header,
.course-detail-content {
    animation: fadeInUp 0.6s ease-out;
}

.course-detail-content {
    animation-delay: 0.2s;
}

/* Asegurar que el contenedor tenga el ancho correcto */
.container {
    width: 100%;
}

/* Forzar estilos en caso de conflictos */
body.course-detail-page {
    background: var(--bg-gradient-primary);
    min-height: 100vh;
}

body.course-detail-page .header {
    background: var(--bg-gradient-sidebar);
}

body.course-detail-page .course-detail-header {
    background: var(--bg-gradient-card);
}

body.course-detail-page .course-detail-content {
    background: var(--bg-gradient-card);
}

/* Hover effects for better interactivity */
.course-detail-content {
    transition: var(--transition-normal);
}

.course-detail-content:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
}

/* Alert styles */
.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.flash-message {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    color: var(--white);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1050;
    opacity: 0;
    transform: translateY(-20px);
    animation: fadeInDown 0.5s forwards;
}

.flash-message.success {
    background-color: var(--success);
}

.flash-message.error {
    background-color: var(--error);
}

@keyframes fadeInDown {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === Footer Adjustments for New Structure === */

/* 1. Restore Logo Size */
.footer-logo-img {
    height: 80px;
    width: auto;
    /* The .logo-footer class already provides margin-bottom */
}

/* 2. Reset Lists in Footer */
.footer-left ul,
.footer-center ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* 3. Style for new list items that replaced paragraphs */
.footer-left li {
    font-size: 14px;
    margin-bottom: 10px;
    color: #ccc;
}

/* 4. Adjust spacing for navigation links */
.footer-center li {
    margin-bottom: 10px;
}

/* Override margin from old 'a' selector in landing.css */
.footer-center a {
    margin-bottom: 0;
}

/* 5. Style the new footer bottom section */
.footer-bottom {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #444; /* Matches footer style */
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: #aaa;
}

.footer-bottom p {
    margin: 0;
}

.footer-legal {
    display: flex;
    gap: 20px;
}

.footer-legal a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: var(--gold-primary);
}

/* === End of Footer Adjustments === */

/* Desactivar la zona interactiva de la sección de historia */
.interactive-grid {
    display: none !important;
}