:root {
    --main-bg: #050505;
    --card-bg: #121212;
    --accent-blue: #00b4ff;
    --metallic-silver: #c0c0c0;
    --text-light: #f0f0f0;
    --border-color: #333333;
}

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

body {
    background-color: var(--main-bg);
    color: var(--text-light);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    scroll-behavior: smooth;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 80px 20px;
}

/* Navegación */
nav {
    background: rgba(0, 0, 0, 0.95);
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

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

.brand {
    font-family: 'Orbitron', sans-serif;
    color: var(--accent-blue);
    font-weight: 700;
    letter-spacing: 3px;
    font-size: 1.4rem;
}

nav ul { display: flex; list-style: none; gap: 30px; }
nav a { text-decoration: none; color: white; font-size: 0.9rem; transition: 0.3s; }
nav a:hover { color: var(--accent-blue); }

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(circle at center, #1a1a1a 0%, #050505 100%);
    padding-top: 80px;
}

.main-logo {
    width: 280px;
    margin-bottom: 30px;
    filter: drop-shadow(0 0 15px rgba(0, 180, 255, 0.3));
}

h1 { font-family: 'Orbitron', sans-serif; font-size: 3rem; margin-bottom: 20px; }
.hero p { max-width: 700px; margin: 0 auto 30px; color: var(--metallic-silver); }

.hero-btns { display: flex; gap: 20px; justify-content: center; }

.btn-primary, .btn-secondary {
    padding: 12px 35px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: 0.3s;
}

.btn-primary { background: var(--accent-blue); color: black; }
.btn-primary:hover { background: #00d2ff; transform: translateY(-3px); }

.btn-secondary { border: 1px solid var(--accent-blue); color: var(--accent-blue); }
.btn-secondary:hover { background: rgba(0, 180, 255, 0.1); }

/* Estadísticas y Tecnología */
h2 { font-family: 'Orbitron', sans-serif; text-align: center; margin-bottom: 50px; font-size: 2rem; color: var(--accent-blue); }

.stats-grid, .tech-grid, .pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.stat-card, .tech-card, .price-box {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: 0.3s;
}

.stat-card h3 { font-size: 2.5rem; color: var(--accent-blue); margin-bottom: 10px; }
.tech-card h4 { margin-bottom: 15px; color: var(--accent-blue); }

/* Precios */
.price-box.featured {
    border: 2px solid var(--accent-blue);
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(0, 180, 255, 0.1);
}

.price { font-size: 2.5rem; font-weight: 700; margin: 20px 0; }
.price span { font-size: 1rem; margin-left: 5px; }

.price-box ul { text-align: left; list-style: none; margin-top: 25px; }
.price-box li { margin-bottom: 12px; font-size: 0.9rem; }
.price-box li::before { content: "✓ "; color: var(--accent-blue); }

/* Team Section */
.authors-list { list-style: none; margin: 30px 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 15px; }
.authors-list li { background: #222; padding: 8px 15px; border-radius: 20px; font-size: 0.85rem; }

.team-section { text-align: center; }
.institution { color: var(--accent-blue); font-weight: bold; margin-top: 10px; }

footer {
    text-align: center;
    padding: 50px;
    background: #000;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: #666;
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    .hero-btns { flex-direction: column; }
    .price-box.featured { transform: scale(1); }
}