/**
 * SkillArena AI - Estilos Principales
 * Diseño moderno, elegante y responsivo
 */

/* ==================== Variables CSS ==================== */
:root {
    /* Colores principales */
    --primary-color: #6366F1;
    --primary-dark: #4F46E5;
    --primary-light: #818CF8;
    --secondary-color: #10B981;
    --accent-color: #F59E0B;
    
    /* Colores de estado */
    --success-color: #10B981;
    --error-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    
    /* Grises */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Tipografía */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Poppins', var(--font-primary);
    
    /* Tamaños */
    --header-height: 70px;
    --sidebar-width: 260px;
    
    /* 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);
    
    /* Bordes */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Transiciones */
    --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);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

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

ul {
    list-style: none;
}

/* ==================== Contenedores ==================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.container-fluid {
    width: 100%;
    padding: 0 1.5rem;
}

/* ==================== Botones ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.btn-secondary:hover {
    background: #059669;
    border-color: #059669;
}

.btn-danger {
    background: var(--error-color);
    color: white;
    border-color: var(--error-color);
}

.btn-danger:hover {
    background: #DC2626;
    border-color: #DC2626;
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
    display: flex;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==================== Navbar ==================== */
.navbar {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
}

.navbar .container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all var(--transition-base);
}

.nav-brand:hover {
    transform: translateY(-1px);
}

.nav-brand i {
    font-size: 1.75rem;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    flex: 1;
    justify-content: center;
}

.nav-menu a {
    color: var(--gray-700);
    font-weight: 600;
    font-size: 0.9375rem;
    position: relative;
    padding: 0.5rem 0;
    transition: all var(--transition-fast);
    letter-spacing: 0.01em;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    border-radius: 3px;
    transition: width var(--transition-base);
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.875rem;
}

.nav-actions .btn {
    font-size: 0.875rem;
    padding: 0.625rem 1.5rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.15);
}

.nav-actions .btn-outline {
    background: white;
    color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: none;
}

.nav-actions .btn-outline:hover {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

.nav-actions .btn-primary {
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    border: none;
}

.nav-actions .btn-primary:hover {
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.35);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-700);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav-toggle:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

/* ==================== Hero Section ==================== */
.hero {
    position: relative;
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    padding: 4rem 0;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.gradient-text {
    background: linear-gradient(to right, #fff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9375rem;
    opacity: 0.9;
}

/* ==================== Secciones ==================== */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto 1.5rem;
}

/* ==================== Features ==================== */
.features-section {
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border-radius: var(--radius-xl);
    font-size: 2rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--gray-600);
}

/* ==================== Competitions ==================== */
.competitions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.competition-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.competition-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.competition-image {
    height: 200px;
    background-size: cover;
    background-position: center;
    background-color: var(--gray-200);
}

.competition-content {
    padding: 1.5rem;
}

.competition-category {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.875rem;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.competition-content h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.competition-content p {
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.competition-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.meta-item i {
    color: var(--primary-color);
}

/* ==================== Jobs ==================== */
.jobs-section {
    background: white;
}

.jobs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.job-card {
    padding: 1.5rem;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.job-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.job-header {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.company-logo {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
}

.company-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.company-logo i {
    font-size: 1.5rem;
    color: var(--gray-400);
}

.job-info h3 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.company-name {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

.job-details {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.job-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: white;
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

.job-badge i {
    color: var(--primary-color);
    font-size: 0.75rem;
}

/* ==================== CTA Section ==================== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    text-align: center;
}

.cta-content h2 {
    color: white;
    margin-bottom: 1rem;
    font-size: 2.5rem;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-section .btn {
    background: white;
    color: var(--primary-color);
}

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

/* ==================== Footer ==================== */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
}

.footer-brand i {
    font-size: 1.75rem;
    color: var(--primary-color);
}

.footer-col p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.footer-col h4 {
    color: white;
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col ul li a {
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-800);
    color: white;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--gray-800);
    text-align: center;
}

/* ==================== Auth Pages ==================== */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-container {
    width: 100%;
    padding: 2rem;
}

.auth-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.register-wrapper {
    grid-template-columns: 1fr;
    max-width: 800px;
}

.auth-left {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

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

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.logo-container i {
    font-size: 3rem;
}

.logo-container h1 {
    color: white;
    font-size: 2rem;
}

.tagline {
    font-size: 1.125rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.feature-item i {
    font-size: 1.5rem;
    opacity: 0.9;
}

.auth-right {
    padding: 3rem;
}

.auth-right.full-width {
    grid-column: 1 / -1;
}

.auth-header {
    margin-bottom: 2rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-600);
    margin-bottom: 1rem;
    font-weight: 500;
}

.back-link:hover {
    color: var(--primary-color);
}

.auth-header h2 {
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--gray-600);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-section {
    padding: 1.5rem;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
}

.form-section h3 {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
    color: var(--primary-color);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group small {
    margin-top: 0.375rem;
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.password-input {
    position: relative;
}

.password-input input {
    padding-right: 3rem;
}

.toggle-password {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray-500);
    cursor: pointer;
    padding: 0.5rem;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    cursor: pointer;
}

.link {
    color: var(--primary-color);
    font-weight: 500;
}

.link:hover {
    text-decoration: underline;
}

.auth-footer {
    margin-top: 2rem;
    text-align: center;
    color: var(--gray-600);
}

.role-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.role-card {
    position: relative;
    cursor: pointer;
}

.role-card input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.role-content {
    padding: 1.5rem;
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.role-card input[type="radio"]:checked + .role-content {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.role-content i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.role-content h4 {
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
}

.role-content p {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* ==================== Alerts ==================== */
.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.alert i {
    font-size: 1.25rem;
}

.alert-error {
    background: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.alert-success {
    background: #D1FAE5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

.alert-warning {
    background: #FEF3C7;
    color: #92400E;
    border: 1px solid #FDE68A;
}

.alert-info {
    background: #DBEAFE;
    color: #1E40AF;
    border: 1px solid #BFDBFE;
}

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .navbar .container {
        gap: 1rem;
    }
    
    .nav-menu {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        border-radius: 0 0 16px 16px;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu a {
        font-size: 1.125rem;
        padding: 1rem 0;
        width: 100%;
        text-align: center;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-actions {
        gap: 0.5rem;
    }
    
    .nav-actions .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8125rem;
    }
}

@media (max-width: 768px) {
    .auth-wrapper {
        grid-template-columns: 1fr;
    }
    
    .auth-left {
        display: none;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .competitions-grid,
    .jobs-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .role-selection {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    section {
        padding: 3rem 0;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

/* ==================== Animaciones ==================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

.fade-in {
    animation: fadeIn var(--transition-base);
}

.slide-up {
    animation: slideUp var(--transition-base);
}

/* ==================== Utilities ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* ==================== Sección Universidades ==================== */
.universities-section {
    padding: 5rem 0;
    background: var(--gray-50);
}

.university-card {
    cursor: pointer;
}

.university-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12) !important;
}

/* ==================== Sección Sobre Nosotros ==================== */
.about-section {
    position: relative;
    overflow: hidden;
}

.about-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    pointer-events: none;
}

.about-card {
    transition: transform var(--transition-base), background var(--transition-base);
}

.about-card:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.15) !important;
}