:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --primary: #3b82f6;
    --accent: #8b5cf6;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --danger: #ef4444;
    --success: #10b981;
}

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.navbar {
    background: var(--bg-card);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Cards & Dashboard */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid rgba(255,255,255,0.05);
    transition: transform 0.2s;
}

.card:hover { transform: translateY(-5px); }

.stat-number { font-size: 2.5rem; font-weight: bold; color: var(--primary); }
.stat-label { color: var(--text-muted); text-transform: uppercase; font-size: 0.85rem; }

/* Forms & Inputs */
input, select, textarea {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    background: #0f172a;
    border: 1px solid #334155;
    color: white;
    border-radius: 6px;
    box-sizing: border-box;
}

button {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    width: 100%;
    transition: opacity 0.2s;
}

button:hover { opacity: 0.9; }
button.secondary { background: #334155; }
button.danger { background: var(--danger); }

/* Tables */
table { width: 100%; border-collapse: collapse; margin-top: 20px; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid #334155; }
th { color: var(--text-muted); }

/* Utility */
.badge { padding: 4px 8px; border-radius: 4px; font-size: 0.8rem; }
.badge-vip { background: linear-gradient(45deg, #ffd700, #ff8c00); color: black; }
.text-center { text-align: center; }

@media (max-width: 768px) {
    .navbar { flex-direction: column; gap: 10px; }
    .grid { grid-template-columns: 1fr; }
}