:root {
  --bg: #f4f6f9; --card: #ffffff; --fg: #1d2330; --muted: #6b7280; --line: #e3e7ee;
  --accent: #2d7ff9; --ok: #16a34a; --warn: #d97706; --crit: #dc2626;
  --ok-bg: #dcfce7; --warn-bg: #fef3c7; --crit-bg: #fee2e2; --badge-bg: #e5e7eb;
  --mem: #2d7ff9; --arc: #8b5cf6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1419; --card: #171d26; --fg: #e5e9f0; --muted: #8b95a5; --line: #263041;
    --ok-bg: #14532d55; --warn-bg: #78350f55; --crit-bg: #7f1d1d55; --badge-bg: #2a3444;
  }
}
* { box-sizing: border-box; }
html { color-scheme: light dark; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header.top { display: flex; align-items: center; gap: 24px; padding: 10px 20px; background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 2; }
.brand { font-weight: 700; font-size: 16px; color: var(--fg); letter-spacing: .02em; }
nav { display: flex; gap: 4px; flex: 1; }
nav a { color: var(--muted); padding: 6px 10px; border-radius: 6px; }
nav a.on, nav a:hover { color: var(--fg); background: var(--bg); text-decoration: none; }
.refresh { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); opacity: .6; }
.refresh.stale { background: var(--warn); }
.refresh.paused { background: var(--muted); }

main { max-width: 1280px; margin: 0 auto; padding: 16px 20px 40px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; margin-bottom: 16px; }
.card h2 { margin: 0 0 10px; font-size: 15px; font-weight: 600; display: flex; align-items: baseline; gap: 10px; }
.card h2 .muted { font-weight: 400; font-size: 13px; }
.grid.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-bottom: 16px; }
.grid.metrics .card { margin: 0; }
.metric .big { font-size: 32px; font-weight: 600; line-height: 1.1; margin: 2px 0 4px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.ok { color: var(--ok); } .warn { color: var(--warn); } .crit { color: var(--crit); }
.crit-text { color: var(--crit); } .warn-text { color: var(--warn); }
.kv div { margin: 2px 0; }
.kv .muted { display: inline-block; min-width: 110px; }
.kv.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 0 20px; }

.badge { display: inline-block; padding: 1px 7px; border-radius: 999px; font-size: 11px; font-weight: 600; background: var(--badge-bg); color: var(--fg); vertical-align: middle; text-transform: uppercase; letter-spacing: .03em; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.crit { background: var(--crit-bg); color: var(--crit); }

.bar { position: relative; height: 10px; background: var(--badge-bg); border-radius: 5px; overflow: hidden; margin: 6px 0; }
.bar.small { display: inline-block; width: 80px; height: 8px; margin: 0; vertical-align: middle; }
.bar .fill { position: absolute; left: 0; top: 0; bottom: 0; background: var(--accent); }
.bar .fill.mem { background: var(--mem); }
.bar .fill.arc { background: var(--arc); }
.bar .fill.ok { background: var(--ok); } .bar .fill.warn { background: var(--warn); } .bar .fill.crit { background: var(--crit); }
.arc-dot { display: inline-block; width: 8px; height: 8px; border-radius: 2px; background: var(--arc); margin-right: 4px; }

svg.spark { display: block; width: 100%; height: 40px; margin-top: 8px; }
svg.spark polyline { fill: none; stroke: var(--accent); stroke-width: 1.5; vector-effect: non-scaling-stroke; }
svg.spark polygon { fill: var(--accent); opacity: .12; }
svg.spark.temp polyline { stroke: var(--warn); } svg.spark.temp polygon { fill: var(--warn); }
svg.spark.mem polyline { stroke: var(--mem); } svg.spark.mem polygon { fill: var(--mem); }

.tablewrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
tbody tr:last-child td { border-bottom: 0; }
table.compact th, table.compact td { padding: 3px 8px; }
tr.row-crit td { background: var(--crit-bg); }
details.sensors { margin-top: 6px; }
details.sensors summary { cursor: pointer; }

.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; background: var(--badge-bg); }
.flash.ok { background: var(--ok-bg); color: var(--ok); }
.flash.crit { background: var(--crit-bg); color: var(--crit); }
.alerts-open { border-color: var(--crit); }
.alert { padding: 8px 28px 8px 0; border-top: 1px solid var(--line); position: relative; }
.alert.acked .alert-title { color: var(--muted); }
.x-form { display: inline; }
.alert .x-form:not(.inline) { position: absolute; top: 6px; right: 0; }
button.x { padding: 0 6px; line-height: 20px; font-size: 18px; background: transparent; border: 0; color: var(--muted); }
button.x:hover { color: var(--crit); }
button.link { padding: 0; border: 0; background: none; color: var(--accent); font-size: inherit; }
button.link:hover { text-decoration: underline; }
.alert:first-of-type { border-top: 0; }
.alert-title { font-weight: 600; }
.alert.resolved .alert-title { color: var(--muted); font-weight: 500; }
.alert-detail { margin: 4px 0; font: 12px/1.4 ui-monospace, Menlo, Consolas, monospace; white-space: pre-wrap; color: var(--muted); }

button { font: inherit; padding: 6px 14px; border-radius: 6px; border: 1px solid var(--accent); background: var(--accent); color: #fff; cursor: pointer; }
button.secondary { background: transparent; color: var(--accent); }
button:disabled { opacity: .5; cursor: default; }
form.inline { display: inline; margin-top: 8px; }
.actions { display: flex; gap: 10px; }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 10px 24px; }
.form-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.form-grid label.wide { grid-column: 1 / -1; }
.form-grid label.check { flex-direction: row; align-items: center; color: var(--fg); }
.form-grid .unit { display: flex; align-items: center; gap: 6px; color: var(--fg); }
.form-grid .unit input { width: 90px; }
input, select, textarea { font: inherit; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg); }
input[type=checkbox] { width: auto; margin-right: 6px; }
textarea { resize: vertical; }

/* dataset management (ZFS page) */
details.newds, details.destroy { margin-top: 8px; }
details.newds summary, details.destroy summary { cursor: pointer; }
details.newds summary { color: var(--accent); }
.ds-form { margin-top: 10px; }
.ds-form button { margin-top: 4px; }
.ds-destroy { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 6px; }
button.danger { border-color: var(--crit); color: var(--crit); }

/* shares page */
.card h3 { margin: 18px 0 8px; font-size: 14px; font-weight: 600; }
.nowrap { white-space: nowrap; }
.form-grid .field { display: flex; flex-direction: column; gap: 4px; font-size: 13px; }
.form-grid .field-name { color: var(--muted); }
.checks { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.checks .check-item { display: inline-flex; align-items: center; gap: 4px; color: var(--fg); font-size: 13px; }