:root {
    /* Valeurs par défaut (Mode Sombre / Hacker) */
    --bg-color: #050a10;
    --card-bg: rgba(20, 30, 48, 0.7);
    --text-primary: #e0f7fa;
    --text-secondary: #94a3b8;
    --accent: #00f2ff; /* Cyan Néon */
    --danger: #ff2a2a;
    --border: rgba(0, 242, 255, 0.2);
    --font-head: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;
    --gradient: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);
}

/* Auto Light Mode (Mode Corporate) */
@media (prefers-color-scheme: light) {
    :root {
        --bg-color: #f0f2f5;
        --card-bg: #ffffff;
        --text-primary: #1a1a2e;
        --text-secondary: #555;
        --accent: #0d47a1; /* Bleu Marine */
        --border: rgba(0,0,0,0.1);
        --gradient: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    }
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Effet de grille en arrière plan */
.background-grid {
    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;
    opacity: 0.1;
    z-index: -1;
}

/* Navigation */
nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 5%;
    background: rgba(0,0,0,0.2);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: fixed; width: 100%; top: 0; z-index: 100;
}

.logo { font-family: var(--font-head); font-size: 1.5rem; font-weight: 700; letter-spacing: 2px; }
.logo .highlight { color: var(--accent); }

.nav-links a { color: var(--text-primary); text-decoration: none; margin-left: 20px; font-weight: 600; font-size: 0.9rem; text-transform: uppercase;}
.btn-alert { background: var(--danger); padding: 8px 15px; border-radius: 4px; color: white !important; }
#langSwitcher { background: transparent; color: var(--text-primary); border: 1px solid var(--border); padding: 5px; margin-left: 20px; cursor: pointer; }

/* Header / Hero */
header {
    padding: 180px 20px 100px;
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
}

.badge {
    display: inline-block; padding: 5px 15px; border: 1px solid var(--accent);
    color: var(--accent); font-family: var(--font-head); font-size: 0.8rem;
    margin-bottom: 20px; letter-spacing: 1px;
}

h1 { font-family: var(--font-head); font-size: 3.5rem; line-height: 1.1; margin-bottom: 20px; }
.text-gradient { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
#hero-desc { color: var(--text-secondary); font-size: 1.2rem; max-width: 700px; margin: 0 auto 50px; }

/* Stats */
.stats-row { display: flex; justify-content: center; gap: 50px; border-top: 1px solid var(--border); padding-top: 40px; }
.stat-box h3 { font-family: var(--font-head); font-size: 2.5rem; color: var(--accent); }
.stat-box p { font-family: 'Roboto Mono', monospace; font-size: 0.9rem; color: var(--text-secondary); }

/* Services Grid */
.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; }
.section-title { font-family: var(--font-head); text-align: center; margin-bottom: 50px; font-size: 2rem; color: var(--text-primary); border-left: 4px solid var(--accent); padding-left: 15px; display: inline-block;}

.grid-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.card {
    background: var(--card-bg); border: 1px solid var(--border); padding: 30px;
    border-radius: 8px; transition: transform 0.3s;
}
.card:hover { transform: translateY(-5px); border-color: var(--accent); box-shadow: 0 10px 30px rgba(0, 242, 255, 0.1); }
.icon { font-size: 2.5rem; color: var(--accent); margin-bottom: 20px; }
.card h3 { margin-bottom: 10px; font-family: var(--font-head); }

/* Report Form */
.report-wrapper { background: linear-gradient(to bottom, transparent, rgba(0,0,0,0.5)); padding: 80px 20px; }
.report-container {
    max-width: 600px; margin: 0 auto;
    background: var(--card-bg); border: 1px solid var(--accent);
    padding: 40px; border-radius: 10px;
    box-shadow: 0 0 50px rgba(0, 242, 255, 0.05);
}

.report-header { display: flex; align-items: center; gap: 15px; margin-bottom: 10px; color: var(--accent); }
.warning-text { font-family: 'Roboto Mono', monospace; font-size: 0.8rem; color: var(--danger); margin-bottom: 30px; display: block; }

.input-group { margin-bottom: 20px; }
.input-group label { display: block; margin-bottom: 8px; font-weight: 600; font-size: 0.9rem; font-family: var(--font-head); }
input, select, textarea {
    width: 100%; padding: 12px; background: rgba(0,0,0,0.3);
    border: 1px solid var(--border); color: var(--text-primary); font-family: 'Roboto Mono', monospace;
    border-radius: 4px;
}
input:focus, textarea:focus { outline: none; border-color: var(--accent); }

.submit-btn {
    width: 100%; padding: 15px; background: var(--gradient);
    border: none; color: white; font-weight: bold; font-family: var(--font-head); letter-spacing: 2px;
    cursor: pointer; transition: 0.3s; margin-top: 10px;
}
.submit-btn:hover { opacity: 0.9; box-shadow: 0 0 20px rgba(0, 198, 255, 0.4); }

footer { text-align: center; padding: 40px; border-top: 1px solid var(--border); color: var(--text-secondary); font-size: 0.8rem; }