/* FRAMEWORK ÉLITE - ESTÁNDAR DE ALTA CONVERSIÓN */
:root {
    --bg-dark: #05070a;
    --card-bg: rgba(15, 23, 42, 0.6);
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.35);
    --text-white: #ffffff;
    --text-dim: #94a3b8;
    --gradient: linear-gradient(135deg, #ffffff 0%, #38bdf8 100%);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Plus Jakarta Sans', sans-serif; background-color: var(--bg-dark); color: var(--text-white); line-height: 1.6; overflow-x: hidden; }

/* REQUISITO: IMAGEN DE FONDO CON OVERLAY */
.bg-master {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover; background-position: center; z-index: -2;
    background-image: url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?q=80&w=1920');
}
.bg-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to bottom, rgba(5, 7, 10, 0.85), rgba(5, 7, 10, 0.95)); z-index: -1;
}

nav { display: flex; justify-content: space-between; align-items: center; padding: 20px 8%; background: rgba(5, 7, 10, 0.8); backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px); position: fixed; width: 100%; top: 0; z-index: 1000; border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
.logo { font-weight: 800; font-size: 1.4rem; letter-spacing: 2px; color: var(--text-white); text-decoration: none; text-transform: uppercase; }
.nav-links { display: flex; list-style: none; gap: 30px; }
.nav-links a { text-decoration: none; color: var(--text-dim); font-size: 0.9rem; font-weight: 600; transition: 0.3s; }
.nav-links a:hover { color: var(--accent); }

.hero { height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 0 10%; position: relative; }
.hero-content { position: relative; z-index: 2; }
.hero-content h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); font-weight: 800; line-height: 1.1; margin-bottom: 25px; }

.btn-primary { display: inline-block; padding: 18px 35px; background-color: var(--accent); color: #000; text-decoration: none; font-weight: 700; border-radius: 12px; transition: 0.4s; box-shadow: 0 0 20px var(--accent-glow); border: none; cursor: pointer; }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 35px var(--accent); }

section { padding: 100px 8%; }
.section-title { text-align: center; margin-bottom: 60px; }
.grid-services { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
.card { background: var(--card-bg); padding: 50px; border-radius: 28px; border: 1px solid rgba(255, 255, 255, 0.05); transition: 0.4s ease; backdrop-filter: blur(10px); }
.card:hover { border-color: var(--accent); transform: translateY(-10px); background: rgba(30, 41, 59, 0.4); }

footer { background: #030508; padding: 80px 10% 40px; border-top: 1px solid rgba(255,255,255,0.05); }