:root {
    --primary: #00d9ff;
    --secondary: #0a0e27;
    --accent: #7c3aed;
    --light: #f8fafc;
    --dark: #1e293b;
    --white: #ffffff;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #00d9ff 0%, #7c3aed 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: var(--light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

nav {
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    color: var(--white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    border-bottom: 2px solid var(--primary);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

nav h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--white);
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
    padding: 0.5rem 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

nav a:hover::after {
    width: 100%;
}

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

.lang-switch {
    display: flex;
    gap: 0.5rem;
    border-left: 1px solid rgba(255,255,255,0.3);
    padding-left: 1.5rem;
}

.lang-switch button {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.lang-switch button:hover {
    background: var(--white);
    color: var(--secondary);
}

.lang-switch button.active {
    background: var(--primary);
    border-color: var(--primary);
}

.hero {
    background: linear-gradient(135deg, rgba(10, 14, 39, 0.9) 0%, rgba(124, 58, 237, 0.85) 100%),
                url('https://images.unsplash.com/photo-1541625602330-2277a4c46182?w=1600&q=80') center/cover;
    color: var(--white);
    padding: 8rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 217, 255, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.3) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-logo {
    max-width: 180px;
    height: auto;
    margin-bottom: 2rem;
    filter: drop-shadow(0 8px 16px rgba(0,0,0,0.3));
    animation: fadeInDown 1s ease-out;
    border-radius: 8px;
}

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

.hero-content h2 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
    text-shadow: 2px 4px 8px rgba(0,0,0,0.3);
    animation: fadeInUp 1s ease-out 0.2s both;
}

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

.hero-content .subtitle {
    font-size: 1.4rem;
    font-weight: 600;
    margin-top: 1.5rem;
    text-shadow: 1px 2px 4px rgba(0,0,0,0.2);
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-content p {
    font-size: 1.15rem;
    margin: 0.5rem 0;
    text-shadow: 1px 2px 4px rgba(0,0,0,0.2);
    animation: fadeInUp 1s ease-out 0.6s both;
}

.divider {
    width: 100px;
    height: 3px;
    background: var(--white);
    margin: 2rem auto;
}

.section {
    padding: 4rem 2rem;
}

.section.alt {
    background: var(--light);
}

.section h2 {
    font-size: 2.8rem;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--secondary);
    font-weight: 800;
    position: relative;
    padding-bottom: 1rem;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}

.card {
    background: var(--white);
    padding: 2.5rem;
    margin: 2rem 0;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 1px solid rgba(0,0,0,0.05);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

.card h3 {
    color: var(--secondary);
    margin-bottom: 1rem;
    font-size: 1.6rem;
    font-weight: 700;
}

.card ul {
    margin-left: 1.5rem;
}

.card li {
    margin: 0.8rem 0;
    position: relative;
    padding-left: 0.5rem;
}

.card li::before {
    content: '🚴';
    position: absolute;
    left: -1.5rem;
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    margin-top: 1rem;
    transition: all 0.3s ease;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 217, 255, 0.4);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

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

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 217, 255, 0.6);
}

details {
    cursor: pointer;
}

details summary {
    padding: 1.5rem;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 12px;
    margin-bottom: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

details summary:hover {
    background: linear-gradient(135deg, #e0e7ef 0%, #b8c6db 100%);
    border-color: var(--accent);
    transform: translateX(5px);
}

details[open] summary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--white);
    margin-bottom: 2rem;
}

.reglamento-content {
    padding: 1rem 0;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reglamento-content h4 {
    color: var(--accent);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    font-weight: 700;
    padding-left: 1rem;
    border-left: 4px solid var(--primary);
}

.sponsors-intro {
    text-align: center;
    font-size: 1.15rem;
    color: var(--dark);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.sponsors {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 2rem;
}

.sponsor-card {
    background: var(--white);
    padding: 3rem 2rem;
    text-align: center;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.sponsor-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.sponsor-card:hover::before {
    transform: scaleX(1);
}

.sponsor-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    border-color: var(--accent);
}

.sponsor-logo {
    min-height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 12px;
}

.sponsor-logo img {
    max-width: 220px;
    max-height: 110px;
    height: auto;
    width: auto;
    filter: grayscale(0%) contrast(1.1);
    transition: all 0.3s ease;
}

.sponsor-card:hover .sponsor-logo img {
    transform: scale(1.05);
    filter: grayscale(0%) contrast(1.2);
}

.sponsor-card h3 {
    color: var(--secondary);
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
    font-weight: 700;
}

.btn-sponsor {
    display: inline-block;
    color: var(--accent);
    text-decoration: none;
    padding: 0.8rem 1.8rem;
    border: 2px solid var(--accent);
    border-radius: 50px;
    transition: all 0.3s ease;
    margin-top: 1rem;
    font-weight: 600;
}

.btn-sponsor:hover {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--white);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(124, 58, 237, 0.4);
}

.club-gallery {
    margin-top: 4rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.gallery-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    transition: all 0.3s ease;
    aspect-ratio: 16/10;
}

.gallery-item:hover {
    transform: scale(1.03);
    box-shadow: 0 15px 40px rgba(0,0,0,0.25);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
    padding: 1.5rem;
    color: white;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.club-image {
    margin-top: 3rem;
    text-align: center;
}

.club-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

footer {
    background: linear-gradient(135deg, #0a0e27 0%, #1e293b 100%);
    color: var(--white);
    text-align: center;
    padding: 3rem 2rem;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
}

footer p {
    font-size: 1rem;
    opacity: 0.9;
}

@media (max-width: 768px) {
    nav .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-right {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    .lang-switch {
        border-left: none;
        border-top: 1px solid rgba(255,255,255,0.3);
        padding-left: 0;
        padding-top: 1rem;
    }
    
    .hero {
        padding: 5rem 1.5rem;
    }
    
    .hero-content h2 {
        font-size: 2.2rem;
    }
    
    .section h2 {
        font-size: 2rem;
    }
    
    .club-gallery {
        grid-template-columns: 1fr;
    }
}