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

:root {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-hover: #334155;
    --border: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --green: #22c55e;
    --green-bg: rgba(34,197,94,0.12);
    --red: #ef4444;
    --red-bg: rgba(239,68,68,0.12);
    --yellow: #eab308;
    --yellow-bg: rgba(234,179,8,0.12);
    --blue: #3b82f6;
    --blue-bg: rgba(59,130,246,0.12);
    --radius: 10px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 220px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 24px 0;
    flex-shrink: 0;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.sidebar-logo {
    padding: 0 20px 24px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.sidebar-logo span { color: var(--blue); }

.sidebar a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.15s;
}

.sidebar a:hover, .sidebar a.active {
    color: var(--text);
    background: var(--surface-hover);
}

.sidebar a.active { border-right: 3px solid var(--blue); }

/* Main content */
.main {
    margin-left: 220px;
    flex: 1;
    padding: 32px;
    max-width: 1200px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.page-header h1 { font-size: 24px; font-weight: 700; }

/* Cards */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

/* Site status card */
.site-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s;
}

.site-card:hover { border-color: var(--blue); }

.site-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.site-card-name {
    font-size: 16px;
    font-weight: 600;
}

.site-card-url {
    font-size: 12px;
    color: var(--text-muted);
    word-break: break-all;
}

.site-card-stats {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

.site-card-stats strong { color: var(--text); }

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-up { background: var(--green-bg); color: var(--green); }
.badge-down { background: var(--red-bg); color: var(--red); }
.badge-pending { background: var(--yellow-bg); color: var(--yellow); }
.badge-paused { background: var(--surface-hover); color: var(--text-muted); }

.badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    display: inline-block;
}

.badge-up .badge-dot { background: var(--green); }
.badge-down .badge-dot { background: var(--red); }
.badge-pending .badge-dot { background: var(--yellow); }
.badge-paused .badge-dot { background: var(--text-muted); }

/* Stat boxes */
.stat-row {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.stat-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    flex: 1;
    text-align: center;
}

.stat-box .label { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.stat-box .value { font-size: 24px; font-weight: 700; }

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th, td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tr:hover td { background: rgba(255,255,255,0.02); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
}

.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { opacity: 0.9; }
.btn-danger { background: var(--red-bg); color: var(--red); }
.btn-danger:hover { background: rgba(239,68,68,0.2); }
.btn-ghost { background: var(--surface-hover); color: var(--text); }
.btn-ghost:hover { background: var(--border); }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* Forms */
.form-row {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group label { font-size: 12px; color: var(--text-muted); font-weight: 600; }

input[type="text"], input[type="url"], input[type="email"] {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    color: var(--text);
    font-size: 14px;
    min-width: 200px;
}

input:focus { outline: none; border-color: var(--blue); }

/* Chart container */
.chart-wrap {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 24px;
}

.chart-wrap h3 { font-size: 14px; margin-bottom: 12px; color: var(--text-muted); }

/* Alert banner */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-success { background: var(--green-bg); color: var(--green); }
.alert-info { background: var(--blue-bg); color: var(--blue); }

/* Settings info */
.info-grid {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 8px 16px;
    font-size: 14px;
}

.info-grid dt { color: var(--text-muted); font-weight: 600; }
.info-grid dd { color: var(--text); }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .main { margin-left: 0; padding: 16px; }
    .card-grid { grid-template-columns: 1fr; }
    .stat-row { flex-direction: column; }
}