:root {
    --bg: #f4f5fa;
    --panel: #ffffff;
    --ink: #1c1c28;
    --muted: #6b7280;
    --brand: #6c63ff;
    --brand-dark: #5449e0;
    --border: #e6e7ee;
    --danger: #e5484d;
    --success: #16a34a;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--ink);
}

a { color: var(--brand); text-decoration: none; }

.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 240px;
    background: #16162a;
    color: #fff;
    padding: 24px 16px;
    flex-shrink: 0;
}
.sidebar .brand { font-weight: 700; font-size: 1.15rem; margin-bottom: 28px; padding: 0 8px; }
.sidebar .brand span { color: var(--brand); }
.sidebar nav a {
    display: block;
    padding: 10px 12px;
    border-radius: 8px;
    color: #cfd0e0;
    margin-bottom: 4px;
    font-size: 0.92rem;
}
.sidebar nav a:hover, .sidebar nav a.active { background: rgba(108,99,255,0.25); color: #fff; }
.sidebar .logout { margin-top: 24px; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 16px; }

.main { flex: 1; padding: 28px 36px; max-width: 1200px; }

.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.topbar h1 { font-size: 1.4rem; margin: 0; }
.topbar .user { color: var(--muted); font-size: 0.9rem; }

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px;
    margin-bottom: 20px;
}

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.stat { padding: 18px; }
.stat .num { font-size: 1.8rem; font-weight: 700; }
.stat .label { color: var(--muted); font-size: 0.85rem; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
tr:hover td { background: #fafafe; }

.btn {
    display: inline-block;
    padding: 10px 16px;
    border-radius: 8px;
    background: var(--brand);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
}
.btn:hover { background: var(--brand-dark); }
.btn.secondary { background: #fff; color: var(--ink); border: 1px solid var(--border); }
.btn.danger { background: var(--danger); }
.btn.small { padding: 6px 10px; font-size: 0.8rem; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 0.85rem; font-weight: 600; color: var(--muted); }
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.92rem;
    font-family: inherit;
}
.form-group input[type=color] { padding: 4px; height: 42px; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.badge.on { background: #dcfce7; color: var(--success); }
.badge.off { background: #fee2e2; color: var(--danger); }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 0.9rem; }
.alert.success { background: #dcfce7; color: #166534; }
.alert.error { background: #fee2e2; color: #991b1b; }

.theme-swatch { width: 100%; height: 90px; border-radius: 10px; margin-bottom: 10px; }

.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6c63ff, #16162a);
}
.login-box {
    background: #fff;
    padding: 36px;
    border-radius: 16px;
    width: 100%;
    max-width: 360px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}
.login-box h1 { margin-top: 0; font-size: 1.3rem; }

.qr-preview { text-align: center; padding: 20px; }
.qr-preview img { border: 8px solid #fff; box-shadow: 0 4px 20px rgba(0,0,0,0.1); border-radius: 8px; }

.actions a, .actions button { margin-right: 6px; }