/* Reset y variables globales */
:root {
    --primary: #60a5fa;
    --primary-dark: #3b82f6;
    --secondary: #a855f7;
    --dark: #0a0f1e;
    --darker: #060914;
    --gray-800: #1e293b;
    --gray-700: #334155;
    --gray-400: #94a3b8;
    --gray-300: #cbd5e1;
    --white: #f8fafc;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --transition: all 0.3s ease;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--dark) 0%, var(--darker) 100%);
    color: var(--white);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Utilidades */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    background: rgba(10, 15, 30, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(96, 165, 250, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(6, 9, 20, 0.98);
    box-shadow: var(--shadow-lg);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    min-height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
    transition: var(--transition);
}

.logo i {
    font-size: 1.8rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.logo:hover {
    transform: scale(1.02);
}

/* Navegación */
.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-menu a {
    color: var(--gray-300);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu a i {
    font-size: 1rem;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: var(--transition);
}

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

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

/* Hamburger */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger i {
    font-size: 1.5rem;
    color: var(--white);
    transition: var(--transition);
}

.hamburger:hover i {
    color: var(--primary);
}

/* Main */
.main {
    flex: 1;
    padding: 3rem 0;
}

/* Hero section */
.hero {
    text-align: center;
    padding: 3rem 1rem;
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.1), rgba(168, 85, 247, 0.1));
    border-radius: 2rem;
    margin-bottom: 3rem;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(96, 165, 250, 0.2);
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--white), var(--primary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    font-size: 1.1rem;
    color: var(--gray-400);
    max-width: 700px;
    margin: 0 auto;
}

/* Secciones */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-title i {
    color: var(--primary);
    font-size: 1.8rem;
}

/* Tarjetas */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.radio-card {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(8px);
    border-radius: 1rem;
    border: 1px solid rgba(96, 165, 250, 0.2);
    padding: 1.5rem;
    transition: var(--transition);
    cursor: pointer;
}

.radio-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    background: rgba(30, 41, 59, 0.7);
    box-shadow: var(--shadow-xl);
}

.radio-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--white);
}

.radio-card p {
    color: var(--gray-400);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.radio-card .badge {
    display: inline-block;
    background: rgba(96, 165, 250, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-family: monospace;
    margin-top: 0.5rem;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.card-link i {
    transition: var(--transition);
}

.card-link:hover {
    color: var(--primary-dark);
    gap: 0.75rem;
}

/* Footer */
.footer {
    background: rgba(6, 9, 20, 0.95);
    border-top: 1px solid rgba(96, 165, 250, 0.2);
    padding: 3rem 0 1.5rem;
    margin-top: 3rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-section p,
.footer-section ul {
    color: var(--gray-400);
    font-size: 0.9rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

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

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.85rem;
    color: var(--gray-400);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .hamburger {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(6, 9, 20, 0.98);
        backdrop-filter: blur(12px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        gap: 0;
        padding: 1rem 0;
        border-bottom: 1px solid var(--primary);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 0;
    }
    
    .nav-menu a {
        padding: 1rem;
        justify-content: center;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-section ul li a {
        justify-content: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

/* Animaciones */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero, .cards-grid {
    animation: fadeIn 0.6s ease-out;
}