:root {
    --primary: #00ff88; /* Verde Neón */
    --dark-bg: #0f172a;
    --card-bg: #1e293b;
    --text-white: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: var(--dark-bg);
    color: var(--text-white);
    line-height: 1.6;
}

header {
    background: rgba(15, 23, 42, 0.95);
    padding: 1rem 5%;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
}

.logo span { color: var(--primary); }

.nav-links { display: flex; list-style: none; gap: 20px; }

.nav-links a {
    color: white;
    text-decoration: none;
    transition: 0.3s;
}

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

.hero {
    height: 100vh;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(15,23,42,1)), 
                url('https://images.unsplash.com/photo-1540747913346-19e32dc3e97e?auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 20px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.hero h1 span { color: var(--primary); }

.btn-main {
    background: var(--primary);
    color: #000;
    padding: 15px 40px;
    border: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-main:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--primary);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    padding: 80px 10%;
}

.card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
}

.highlighted {
    border: 2px solid var(--primary);
}

footer {
    text-align: center;
    padding: 40px;
    font-size: 0.8rem;
    opacity: 0.6;
}