:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1c2430;
  --muted: #5d6877;
  --line: #dde1e7;
  --accent: #1f5fbf;
  --ok: #17803d;
  --ok-bg: #e3f4e8;
  --maint: #8a5a00;
  --maint-bg: #fdf0d2;
  --error: #b42318;
  --error-bg: #fde4e1;
  --pending: #55606e;
  --pending-bg: #e9ecf0;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161c;
    --panel: #1b212a;
    --text: #e6eaf0;
    --muted: #9aa5b4;
    --line: #2d3541;
    --accent: #6ea8ff;
    --ok: #5fd68a;
    --ok-bg: #173324;
    --maint: #f1c15c;
    --maint-bg: #3a2f12;
    --error: #ff8d84;
    --error-bg: #3d1a17;
    --pending: #aab4c2;
    --pending-bg: #262d37;
  }
}
* { box-sizing: border-box; }
/* display 를 지정한 요소(.row 등)에서도 hidden 속성이 항상 이기게 한다 */
[hidden] { display: none !important; }
html { font-size: 15px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Malgun Gothic", "Apple SD Gothic Neo", sans-serif;
  line-height: 1.45;
}
a { color: var(--accent); }
h1 { font-size: 1.35rem; margin: 0 0 0.75rem; }
h2 { font-size: 1.05rem; margin: 0 0 0.6rem; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.mono { font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; }

.topbar {
  display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap;
  padding: 0.6rem 1.25rem; background: var(--panel); border-bottom: 1px solid var(--line);
}
.topbar[hidden] { display: none; }
.brand { font-weight: 700; text-decoration: none; color: var(--text); }
.nav { display: flex; gap: 0.9rem; flex: 1; }
.nav a { text-decoration: none; padding: 0.2rem 0.1rem; border-bottom: 2px solid transparent; color: var(--muted); }
.nav a.active { color: var(--text); border-bottom-color: var(--accent); }
.who { display: flex; align-items: center; gap: 0.6rem; color: var(--muted); }

main { max-width: 1180px; margin: 0 auto; padding: 1.25rem; }
.foot { max-width: 1180px; margin: 0 auto; padding: 0.5rem 1.25rem 2rem; color: var(--muted); font-size: 0.8rem; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 1rem 1.1rem; margin-bottom: 1rem; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1rem; }
.grid2 > .card { margin-bottom: 0; }

.btn {
  font: inherit; cursor: pointer; border: 1px solid var(--line); background: var(--panel); color: var(--text);
  border-radius: 6px; padding: 0.4rem 0.8rem;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.small { padding: 0.15rem 0.55rem; font-size: 0.85rem; }
.btn:disabled { opacity: 0.55; cursor: default; }
input[type="text"], input[type="password"], input[type="search"], input[type="time"], select {
  font: inherit; padding: 0.4rem 0.55rem; border: 1px solid var(--line); border-radius: 6px;
  background: var(--bg); color: var(--text);
}
label { display: block; font-size: 0.9rem; margin: 0.6rem 0 0.25rem; color: var(--muted); }
label.inline { display: inline-flex; align-items: center; gap: 0.4rem; margin: 0 1rem 0 0; color: var(--text); }

.login { max-width: 360px; margin: 8vh auto 0; }
.login input { width: 100%; }
.login .btn { width: 100%; margin-top: 1rem; }
.msg { margin-top: 0.8rem; padding: 0.5rem 0.7rem; border-radius: 6px; font-size: 0.9rem; }
.msg.err { background: var(--error-bg); color: var(--error); }
.msg.ok { background: var(--ok-bg); color: var(--ok); }

.badge { display: inline-block; padding: 0.1rem 0.55rem; border-radius: 999px; font-size: 0.8rem; font-weight: 600; white-space: nowrap; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.maint { background: var(--maint-bg); color: var(--maint); }
.badge.error { background: var(--error-bg); color: var(--error); }
.badge.pending, .badge.off { background: var(--pending-bg); color: var(--pending); }
.stale { color: var(--error); font-weight: 600; }

.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-bottom: 0.9rem; }
.chip {
  font: inherit; cursor: pointer; border: 1px solid var(--line); background: var(--panel); color: var(--text);
  border-radius: 999px; padding: 0.25rem 0.8rem;
}
.chip[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.chip .n { font-weight: 700; margin-left: 0.3rem; }
.toolbar { display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap; margin-bottom: 0.8rem; }
.toolbar .grow { flex: 1; min-width: 160px; }

.tablewrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.45rem 0.6rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
tbody tr.click { cursor: pointer; }
tbody tr.click:hover { background: color-mix(in srgb, var(--accent) 8%, transparent); }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
.empty { color: var(--muted); padding: 1rem 0.2rem; }

dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: 0.3rem 1rem; margin: 0; }
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; }

.head { display: flex; align-items: baseline; gap: 0.8rem; flex-wrap: wrap; margin-bottom: 0.9rem; }
.head h1 { margin: 0; }
.back { display: inline-block; margin-bottom: 0.6rem; }

svg.chart { width: 100%; height: auto; display: block; }
svg.chart .grid { stroke: var(--line); stroke-width: 1; }
svg.chart .axis { fill: var(--muted); font-size: 11px; }
svg.chart .line { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; }
svg.chart .dot { fill: var(--accent); }

.checks { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.sitepick { max-height: 220px; overflow: auto; border: 1px solid var(--line); border-radius: 6px; padding: 0.4rem 0.6rem; }
.sitepick label { display: flex; margin: 0.15rem 0; gap: 0.45rem; color: var(--text); }
.row { display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap; }
h2.spaced { margin-top: 1.1rem; }