:root {
    --bg-dark: #12141d;
    --card-bg: #1c1f2b;
    --primary: #00d2ff;
    --text: #ffffff;
    --secondary: #2d3244;
}

body { 
    background-color: var(--bg-dark); 
    color: var(--text); 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    line-height: 1.6;
}

/* Navigation */
nav { 
    background: var(--card-bg); 
    padding: 1rem 5%; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    border-bottom: 1px solid var(--secondary);
}

nav a { text-decoration: none; color: #dcdde1; font-weight: 500; margin-left: 20px; }
nav a:hover, nav a.active { color: var(--primary); }

/* Conteneur */
.container { padding: 40px 10%; max-width: 1100px; margin: auto; }

h1 { color: var(--primary); border-bottom: 2px solid var(--primary); padding-bottom: 10px; font-weight: bold; }
h2 { color: var(--primary); margin-top: 30px; }

/* Tableaux style Tech */
table { width: 100%; border-collapse: collapse; margin-top: 20px; background: var(--card-bg); border-radius: 8px; overflow: hidden; }
th, td { padding: 15px; text-align: left; border-bottom: 1px solid var(--secondary); }
th { background: rgba(0, 210, 255, 0.1); color: var(--primary); }

/* Boîtes d'info */
.auth-container { height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg-dark); }
.auth-box { background: var(--card-bg); padding: 40px; border-radius: 15px; width: 350px; text-align: center; border: 1px solid var(--secondary); box-shadow: 0 0 20px rgba(0,210,255,0.1); }

input { 
    width: 100%; padding: 12px; margin: 10px 0; border-radius: 5px; 
    border: 1px solid var(--secondary); background: transparent; color: white; 
}

.btn { 
    background: var(--primary); color: #000; border: none; padding: 12px 25px; 
    border-radius: 5px; cursor: pointer; font-weight: bold; width: 100%; transition: 0.3s;
}

.btn:hover { transform: scale(1.02); filter: brightness(1.1); }