:root {
    --primary: #2563eb;
    --primary-glow: rgba(37, 99, 235, 0.2);
    --bg: #050505;
    --card-bg: #0a0a0a;
    --border: rgba(255, 255, 255, 0.05);
    --text-main: #cbd5e1;
    --text-dim: #94a3b8;
    --white: #ffffff;
}

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

body {
    background-color: var(--bg);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Effet Blueprint (Grid) */
body::before {
    content: "";
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: 
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    pointer-events: none;
}

/* Navigation */
nav {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 0; width: 100%; z-index: 1000;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 2rem;
    font-size: 0.85rem;
    font-weight: 600;
    transition: 0.3s;
}

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

/* Containers & Cards */
.container { max-width: 1200px; margin: 0 auto; padding: 0 5%; }

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 2.5rem;
    border-radius: 12px;
    transition: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

/* Typography */
h1, h2, h3 { font-family: 'Playfair Display', serif; color: var(--white); }

.btn-primary {
    background: var(--primary);
    color: var(--white);
    padding: 1rem 2.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 800;
    text-transform: uppercase;
    display: inline-block;
    transition: 0.3s;
}

.btn-primary:hover {
    box-shadow: 0 0 20px var(--primary-glow);
    transform: scale(1.02);
}