:root {
    --bg: #0e1116;
    --panel: #171b22;
    --border: #262b33;
    --text: #e6e9ef;
    --muted: #8b94a3;
    --accent: #4f9cff;
    --ok: #3ecf6a;
    --err: #ff5c5c;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

h1 { font-size: 1.4rem; margin: 0; }

.status {
    font-size: 0.85rem;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--panel);
    border: 1px solid var(--border);
    color: var(--muted);
}
.status.ok { color: var(--ok); border-color: var(--ok); }
.status.err { color: var(--err); border-color: var(--err); }

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
}

.card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.card-head h2 { font-size: 1rem; margin: 0; }

.dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    display: inline-block;
}
.dot.online  { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.dot.offline { background: var(--err); }

.metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.metrics label {
    display: block;
    font-size: 0.75rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.metrics b {
    font-size: 1.3rem;
    font-weight: 600;
}
.metrics small {
    font-size: 0.75rem;
    color: var(--muted);
    margin-left: 2px;
}

.updated {
    margin-top: 12px;
    font-size: 0.75rem;
    color: var(--muted);
}

.chart-wrap {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
}
.chart-header {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}
.chart-header select {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 6px 10px;
    border-radius: 6px;
}
canvas { max-height: 360px; }