/* ========================================
   ARC ACADEMIA - CURSOS PÚBLICOS MODERNOS
   ======================================== */

:root {
    /* COLORES PRINCIPALES */
    --primary-purple: #6f42c1;
    --primary-blue: #0d6efd;
    --primary-cyan: #17a2b8;
    --accent-orange: #fd7e14;
    --accent-yellow: #ffc107;
    --success-green: #28a745;
    --warning-orange: #ffc107;
    --danger-red: #dc3545;
    
    /* COLORES DE FONDO OSCUROS */
    --dark-bg: #0a0c1a;
    --dark-secondary: #1a1e2e;
    --dark-tertiary: #2a2f45;
    --dark-quaternary: #3a3f55;
    --card-bg: rgba(255, 255, 255, 0.08);
    --card-hover: rgba(255, 255, 255, 0.12);
    --input-bg: rgba(255, 255, 255, 0.1);
    
    /* COLORES DE TEXTO */
    --text-light: #ffffff;
    --text-primary: #e2e8f0;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-dark: #1e293b;
    
    /* GRADIENTES */
    --gradient-primary: linear-gradient(135deg, #6f42c1, #0d6efd);
    --gradient-secondary: linear-gradient(135deg, #17a2b8, #fd7e14);
    --gradient-success: linear-gradient(135deg, #28a745, #20c997);
    --gradient-warning: linear-gradient(135deg, #ffc107, #fd7e14);
    --gradient-danger: linear-gradient(135deg, #dc3545, #e74c3c);
    --gradient-bg: radial-gradient(ellipse at top, #0a0c1a, #1a1e2e, #2a2f45);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
    --gradient-input: linear-gradient(145deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    --gradient-hero: linear-gradient(135deg, rgba(111, 66, 193, 0.95), rgba(13, 110, 253, 0.95));
    
    /* SOMBRAS UX OPTIMIZADAS */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(111, 66, 193, 0.4);
    --shadow-focus: 0 0 0 3px rgba(111, 66, 193, 0.2);
    
    /* TRANSICIONES UX */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* ESPACIADO CONSISTENTE (8px base) */
    --space-1: 0.5rem;   /* 8px */
    --space-2: 1rem;     /* 16px */
    --space-3: 1.5rem;   /* 24px */
    --space-4: 2rem;     /* 32px */
    --space-5: 2.5rem;   /* 40px */
    --space-6: 3rem;     /* 48px */
    --space-8: 4rem;     /* 64px */
    --space-10: 5rem;    /* 80px */
    
    /* BORDERRADIUS SISTEMA */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;
}

/* ========================================
   FOOTER MODERNIZADO - ESTRUCTURA REAL
   ======================================== */

.pie-pagina {
    background: var(--dark-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: var(--space-8);
    position: relative;
    overflow: hidden;
    width: 100%;
}

.footer-wave {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-purple), var(--primary-blue), transparent);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-4);
}

.grupo-1 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-6);
}

.grupo-1 .box {
    background: rgba(255, 255, 255, 0.02);
    padding: var(--space-5);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.grupo-1 .box:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* Logo Section */
.grupo-1 .box figure {
    margin: 0 0 var(--space-3) 0;
    text-align: center;
}

.grupo-1 .box figure img {
    max-width: 180px;
    height: auto;
    filter: brightness(1.1);
    transition: all 0.3s ease;
}

.grupo-1 .box figure img:hover {
    filter: brightness(1.3);
    transform: scale(1.05);
}

.logo-tagline {
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--space-4);
    font-style: italic;
}

/* Newsletter Section */
.newsletter-section {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: var(--space-4);
}

.newsletter-section h3 {
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.newsletter-section h3 i {
    color: var(--primary-purple);
}

.newsletter-section p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin-bottom: var(--space-3);
}

.newsletter-form {
    display: flex;
    gap: var(--space-2);
}

.newsletter-input {
    flex: 1;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.newsletter-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(111, 66, 193, 0.3);
}

.newsletter-btn {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    border: none;
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 50px;
}

.newsletter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(111, 66, 193, 0.4);
}

/* Títulos de secciones */
.grupo-1 .box h2 {
    color: var(--text-light);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.grupo-1 .box h2 i {
    color: var(--primary-blue);
    font-size: 1.1rem;
}

.grupo-1 .box p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: var(--space-3);
}

/* Información de dirección */
.address-info {
    margin: var(--space-4) 0;
}

.address-info h3 {
    color: var(--primary-blue);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.contact-item i {
    color: var(--primary-purple);
    width: 18px;
    text-align: center;
}

/* Enlaces rápidos */
.quick-links {
    margin-top: var(--space-4);
}

.quick-links h4 {
    color: var(--primary-blue);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.quick-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-1);
}

.quick-links ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    display: block;
}

.quick-links ul li a:hover {
    color: var(--primary-purple);
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(5px);
}

/* Redes sociales */
.red-social {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    margin: var(--space-4) 0;
}

.red-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.2rem;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.red-social a:hover {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    color: white;
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 8px 25px rgba(111, 66, 193, 0.4);
}

/* Estadísticas en inline styles - se mantienen como están */

/* Footer bottom */
.grupo-2 {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-4);
    text-align: center;
}

.grupo-2 small {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    line-height: 1.6;
}

.grupo-2 small a {
    color: var(--primary-purple);
    text-decoration: none;
    transition: color 0.3s ease;
}

.grupo-2 small a:hover {
    color: var(--primary-blue);
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 8px 25px rgba(111, 66, 193, 0.5);
}

/* Responsivo del footer */
@media (max-width: 768px) {
    .grupo-1 {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .grupo-1 .box {
        padding: var(--space-4);
        text-align: center;
    }
    
    .quick-links ul {
        grid-template-columns: 1fr;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .contact-info {
        align-items: center;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* ========================================
   MEDIA QUERIES RESPONSIVOS
   ======================================== */

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

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

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

.loading-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-4);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    animation: pulse-logo 2s ease-in-out infinite;
    box-shadow: var(--shadow-glow);
}

.loading-logo::before {
    content: '';
    position: absolute;
    width: 140px;
    height: 140px;
    border: 3px solid rgba(111, 66, 193, 0.3);
    border-radius: 50%;
    animation: rotate-ring 3s linear infinite;
}

.loading-logo::after {
    content: '';
    position: absolute;
    width: 160px;
    height: 160px;
    border: 2px solid rgba(13, 110, 253, 0.2);
    border-radius: 50%;
    animation: rotate-ring-reverse 4s linear infinite;
}

.loading-logo i {
    font-size: 3rem;
    color: var(--text-light);
    z-index: 1;
}

.loading-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.loading-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto;
    border: 3px solid rgba(111, 66, 193, 0.2);
    border-top: 3px solid var(--primary-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-dots {
    display: flex;
    justify-content: center;
    gap: var(--space-1);
    margin-top: var(--space-3);
}

.loading-dot {
    width: 8px;
    height: 8px;
    background: var(--gradient-primary);
    border-radius: 50%;
    animation: bounce-dots 1.4s ease-in-out infinite both;
}

.loading-dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dot:nth-child(2) { animation-delay: -0.16s; }
.loading-dot:nth-child(3) { animation-delay: 0s; }

@keyframes pulse-logo {
    0%, 100% {
        transform: scale(1);
        box-shadow: var(--shadow-glow);
    }
    50% {
        transform: scale(1.05);
        box-shadow: var(--shadow-xl);
    }
}

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

@keyframes rotate-ring-reverse {
    0% { transform: rotate(360deg); }
    100% { transform: rotate(0deg); }
}

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

@keyframes bounce-dots {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ========================================
   RESET Y BASE
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', sans-serif;
    background: var(--gradient-bg);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.7;
    min-height: 100vh;
    font-size: 16px;
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

.main-content {
    flex: 1;
    position: relative;
    opacity: 0;
    transition: opacity 0.8s ease-out;
    padding-bottom: var(--space-6);
}

.main-content.loaded {
    opacity: 1;
}

/* ========================================
   EFECTOS VISUALES Y ANIMACIONES
   ======================================== */

.floating-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.particle {
    position: absolute;
    background: var(--gradient-primary);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
    opacity: 0.1;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    33% { transform: translateY(-30px) rotate(120deg); }
    66% { transform: translateY(15px) rotate(240deg); }
}

.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-in-up {
    animation: slideInUp 0.6s ease-out forwards;
}

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

.scale-in {
    animation: scaleIn 0.5s ease-out forwards;
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

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

.hero-section {
    background: var(--gradient-hero);
    padding: var(--space-10) var(--space-4) var(--space-8);
    text-align: center;
    color: var(--text-light);
    position: relative;
    overflow: hidden;
    margin-bottom: var(--space-6);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1" fill="white" opacity="0.1"/><circle cx="80" cy="40" r="1" fill="white" opacity="0.08"/><circle cx="40" cy="80" r="1" fill="white" opacity="0.12"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.hero-section h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--space-4);
    line-height: 1.2;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.hero-section p {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    margin-bottom: var(--space-6);
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
}

/* ========================================
   FILTROS SECTION MODERNIZADOS
   ======================================== */

.filter-navbar {
    max-width: 1400px;
    margin: 0 auto var(--space-6);
    padding: 0 var(--space-4);
}

.filters-container {
    background: var(--gradient-card);
    backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    box-shadow: var(--shadow-md);
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: var(--space-3);
    align-items: center;
}

.search-container {
    position: relative;
    width: 100%;
}

.search-container i {
    position: absolute;
    left: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
    z-index: 2;
}

.search-container input {
    width: 100%;
    padding: var(--space-3) var(--space-3) var(--space-3) var(--space-10);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    background: var(--gradient-input);
    backdrop-filter: blur(12px);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.search-container input::placeholder {
    color: var(--text-muted);
}

.search-container input:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-focus);
    background: rgba(255, 255, 255, 0.12);
}

/* Filtro de categorías modernizado */
.category-filter {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    padding: var(--space-3) var(--space-4);
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 200px;
}

.category-filter:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(94, 84, 142, 0.3);
}

/* Estilos personalizados para Select2 */
.select2-container--default .select2-selection--single {
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    border-radius: var(--radius-lg) !important;
    height: 48px !important;
    padding: 0 !important;
    backdrop-filter: blur(10px);
}

.select2-container--default .select2-selection--single .select2-selection__rendered {
    color: var(--text-primary) !important;
    line-height: 46px !important;
    padding-left: var(--space-4) !important;
    padding-right: var(--space-8) !important;
    font-size: 0.95rem !important;
    font-weight: 500 !important;
}

.select2-container--default .select2-selection--single .select2-selection__placeholder {
    color: rgba(255, 255, 255, 0.7) !important;
}

.select2-container--default .select2-selection--single .select2-selection__arrow {
    right: var(--space-3) !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
}

.select2-container--default .select2-selection--single .select2-selection__arrow b {
    border-color: var(--text-primary) transparent transparent transparent !important;
    border-width: 6px 6px 0 6px !important;
}

.select2-container--default.select2-container--open .select2-selection--single .select2-selection__arrow b {
    border-color: transparent transparent var(--text-primary) transparent !important;
    border-width: 0 6px 6px 6px !important;
}

.select2-dropdown {
    background: var(--dark-secondary) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    border-radius: var(--radius-lg) !important;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg) !important;
}

.select2-container--default .select2-search--dropdown .select2-search__field {
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    border-radius: var(--radius-md) !important;
    color: var(--text-primary) !important;
    padding: var(--space-2) var(--space-3) !important;
    margin: var(--space-2) !important;
}

.select2-container--default .select2-results__option {
    color: var(--text-primary) !important;
    padding: var(--space-2) var(--space-3) !important;
    font-size: 0.9rem !important;
}

.select2-container--default .select2-results__option--highlighted[aria-selected] {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple)) !important;
    color: white !important;
}

.select2-container--default .select2-results__option[aria-selected=true] {
    background: rgba(94, 84, 142, 0.3) !important;
    color: var(--text-primary) !important;
}

.select2-container--default.select2-container--focus .select2-selection--single {
    border-color: var(--primary-purple) !important;
    box-shadow: 0 0 0 3px rgba(94, 84, 142, 0.3) !important;
}

.category-filter option {
    background: var(--dark-secondary);
    color: var(--text-primary);
    padding: var(--space-1);
}

.clear-filters-btn {
    padding: var(--space-3) var(--space-4);
    background: var(--gradient-secondary);
    color: var(--text-light);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    white-space: nowrap;
    box-shadow: var(--shadow-md);
}

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

.clear-filters-btn i {
    font-size: 1rem;
}

/* ========================================
   SECCIÓN DE CURSOS
   ======================================== */

.courses-section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-4) var(--space-8);
}

.courses-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-6);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Grid de cursos modernizado */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
    max-width: 1400px;
    margin: 0 auto;
}

/* Responsivo para el grid */
@media (max-width: 1200px) {
    .courses-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .courses-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 1.5rem 0;
    }
}

/* ========================================
   TARJETAS DE CURSOS MODERNIZADAS
   ======================================== */

.course-card {
    background: var(--gradient-card);
    backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: -1;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(111, 66, 193, 0.3);
}

.course-card:hover::before {
    opacity: 0.03;
}

.course-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition-normal);
    background: var(--dark-tertiary);
}

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

.course-body {
    padding: var(--space-4);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-info {
    margin-bottom: var(--space-3);
}

.course-info-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.course-info-item i {
    color: var(--primary-purple);
    width: 18px;
    text-align: center;
    font-size: 1rem;
}

.course-info-item strong {
    color: var(--text-primary);
    font-weight: 600;
}

.course-level-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.course-level-badge.basico {
    background: var(--gradient-success);
    color: var(--text-light);
}

.course-level-badge.intermedio {
    background: var(--gradient-warning);
    color: var(--text-dark);
}

.course-level-badge.avanzado {
    background: var(--gradient-danger);
    color: var(--text-light);
}

.course-price {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: var(--space-3) 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.course-price i {
    font-size: 1.2rem;
    color: var(--primary-purple);
}

/* Botones de acción de curso */
.course-actions {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
    width: 100%;
}

.course-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    width: 100%;
    justify-content: center;
    text-align: center;
}

.course-btn::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;
}

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

.course-btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    color: white;
    box-shadow: 
        0 4px 15px rgba(94, 84, 142, 0.3),
        0 2px 8px rgba(0, 0, 0, 0.1);
}

.course-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 8px 25px rgba(94, 84, 142, 0.4),
        0 4px 12px rgba(0, 0, 0, 0.15);
    color: white;
    text-decoration: none;
}

.course-btn-primary {
    background: var(--gradient-primary);
    color: var(--text-light);
}

.course-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--text-light);
    text-decoration: none;
}

.course-btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(12px);
}

.course-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    transform: translateY(-2px);
    text-decoration: none;
}

/* ========================================
   EMPTY STATE
   ======================================== */

.empty-state {
    text-align: center;
    padding: var(--space-10) var(--space-4);
    background: var(--gradient-card);
    backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    grid-column: 1 / -1;
}

.empty-state::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.02;
    z-index: -1;
}

.empty-state-icon {
    width: 120px;
    height: 120px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-6);
    box-shadow: var(--shadow-glow);
    position: relative;
}

.empty-state-icon::after {
    content: '';
    position: absolute;
    width: 140px;
    height: 140px;
    border: 2px solid rgba(111, 66, 193, 0.2);
    border-radius: 50%;
    animation: pulse-ring 2s ease-in-out infinite;
}

@keyframes pulse-ring {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    100% {
        transform: scale(1.2);
        opacity: 0;
    }
}

.empty-state-icon i {
    font-size: 3.5rem;
    color: var(--text-light);
    z-index: 1;
}

.empty-state h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.empty-state p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 400px;
    margin: 0 auto var(--space-6);
}

.empty-state-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
}

.empty-state-btn {
    padding: var(--space-3) var(--space-5);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.empty-state-btn-primary {
    background: var(--gradient-primary);
    color: var(--text-light);
    box-shadow: var(--shadow-md);
}

.empty-state-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    color: var(--text-light);
}

/* ========================================
   PAGINACIÓN MODERNA
   ======================================== */

.pagination-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.pagination-info {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: center;
}

.pagination {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

.pagination li {
    display: flex;
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: var(--gradient-card);
    backdrop-filter: blur(12px);
    color: var(--text-secondary);
}

.pagination a:hover {
    background: var(--gradient-primary);
    color: var(--text-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.pagination .active span {
    background: var(--gradient-primary);
    color: var(--text-light);
    box-shadow: var(--shadow-glow);
    border-color: var(--primary-purple);
}

/* ========================================
   LOADING STATE
   ======================================== */

.loading-container {
    text-align: center;
    padding: var(--space-8);
    color: var(--text-secondary);
}

.loading-spinner-small {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--space-3);
    border: 3px solid rgba(111, 66, 193, 0.2);
    border-top: 3px solid var(--primary-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Large Desktops (1400px+) */
@media (min-width: 1400px) {
    .courses-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Standard Desktops (1200px - 1399px) */
@media (max-width: 1399px) {
    .courses-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Large Tablets (992px - 1199px) */
@media (max-width: 1199px) {
    .courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filters-container {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }
    
    .category-filter {
        min-width: auto;
    }
}

/* Standard Tablets (768px - 991px) */
@media (max-width: 991px) {
    .hero-section {
        padding: var(--space-8) var(--space-3) var(--space-6);
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }
    
    .course-card {
        max-width: 500px;
        margin: 0 auto;
    }
}

/* Large Phones (576px - 767px) */
@media (max-width: 767px) {
    .filter-navbar,
    .courses-section {
        padding-left: var(--space-3);
        padding-right: var(--space-3);
    }
    
    .filters-container {
        padding: var(--space-3);
    }
    
    .course-body {
        padding: var(--space-3);
    }
    
    .course-actions {
        flex-direction: column;
    }
    
    .empty-state {
        padding: var(--space-6) var(--space-3);
    }
    
    .empty-state-icon {
        width: 100px;
        height: 100px;
    }
    
    .empty-state-icon i {
        font-size: 3rem;
    }
}

/* Small Phones (480px and below) */
@media (max-width: 480px) {
    .filter-navbar,
    .courses-section {
        padding-left: var(--space-2);
        padding-right: var(--space-2);
    }
    
    .filters-container {
        padding: var(--space-2);
    }
    
    .search-container input {
        padding: var(--space-2) var(--space-2) var(--space-2) var(--space-8);
    }
    
    .search-container i {
        left: var(--space-2);
    }
    
    .category-filter,
    .clear-filters-btn {
        padding: var(--space-2);
        font-size: 0.9rem;
    }
    
    .course-body {
        padding: var(--space-2);
    }
    
    .course-title {
        font-size: 1.2rem;
    }
    
    .course-price {
        font-size: 1.6rem;
    }
    
    .course-btn {
        padding: var(--space-2) var(--space-3);
        font-size: 0.9rem;
    }
    
    .pagination {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .pagination a,
    .pagination span {
        min-width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }
    
    .empty-state-actions {
        flex-direction: column;
    }
    
    .empty-state-btn {
        padding: var(--space-2) var(--space-3);
        font-size: 0.9rem;
    }
}

/* ========================================
   UTILIDADES Y HELPERS
   ======================================== */

.text-center {
    text-align: center;
}

.text-bold {
    font-weight: 700;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hidden {
    display: none !important;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-secondary);
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .loading-screen * {
        animation: none !important;
    }
}