:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #1c2530;
  --muted: #6b7685;
  --border: #e6eaf0;
  --up: #1ea672;
  --up-bg: #e8f7f0;
  --down: #e0483d;
  --down-bg: #fdecea;
  --warn: #d9a400;
  --unknown: #aab2bd;
  --blue: #2E9BD6;
  --shadow: 0 1px 2px rgba(16,24,40,.04), 0 1px 3px rgba(16,24,40,.06);
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

.top { background: #fff; border-bottom: 1px solid var(--border); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; }
.top h1 { font-size: 17px; margin: 0; font-weight: 680; letter-spacing: -.01em; }
nav a { color: var(--muted); margin-left: 20px; font-weight: 550; }
nav a.active, nav a:hover { color: var(--text); text-decoration: none; }

main { padding: 28px 0 64px; }

.summary {
  display: flex; align-items: center; gap: 12px;
  font-size: 17px; font-weight: 620; padding: 18px 20px;
  border-radius: 14px; background: var(--card); border: 1px solid var(--border);
  box-shadow: var(--shadow); margin-bottom: 24px;
}
.summary em { color: var(--muted); font-style: normal; font-weight: 500; margin-left: auto; font-size: 13px; }
.summary.ok { background: var(--up-bg); border-color: #bfe9d5; }
.summary.bad { background: var(--down-bg); border-color: #f5c4bf; }
.summary.warn { background: #fdf6e3; border-color: #f0e0a8; }

.dot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.dot.up { background: var(--up); box-shadow: 0 0 0 3px var(--up-bg); }
.dot.down { background: var(--down); box-shadow: 0 0 0 3px var(--down-bg); }
.dot.warn { background: var(--warn); }
.dot.unknown { background: var(--unknown); }

.group { margin-bottom: 24px; }
.group h2 { font-size: 12px; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); margin: 0 0 10px 2px; font-weight: 650; }
.row {
  display: flex; align-items: center; gap: 12px;
  padding: 13px 16px; background: var(--card); border: 1px solid var(--border);
  border-radius: 11px; margin-bottom: 8px; box-shadow: var(--shadow);
}
.row .name { font-weight: 570; }
.row .visit { font-size: 12px; color: var(--blue); font-weight: 550; }
.row .visit::after { content: " ↗"; }
.row .detail { color: var(--muted); font-size: 13px; }
.row .latency { margin-left: auto; color: var(--muted); font-size: 12.5px; font-variant-numeric: tabular-nums; }
.row .ago { color: var(--muted); font-size: 12px; min-width: 64px; text-align: right; }
.row.down { border-color: #f2c7c2; background: linear-gradient(0deg, var(--down-bg), var(--down-bg)); }
.row.unknown { opacity: .75; }

.foot { color: var(--muted); font-size: 12px; margin-top: 22px; }

/* Timeline */
.controls { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; margin-bottom: 18px; }
.ranges button {
  background: #fff; color: var(--text); border: 1px solid var(--border);
  padding: 8px 15px; border-radius: 9px; cursor: pointer; font-weight: 560; margin-right: 6px;
  box-shadow: var(--shadow);
}
.ranges button:hover { border-color: #cfd6df; }
.ranges button.active { background: var(--blue); border-color: var(--blue); color: #fff; }
.filter { display: flex; flex-direction: column; gap: 3px; }
.filter select {
  background: #fff; color: var(--text); border: 1px solid var(--border);
  border-radius: 9px; padding: 7px 9px; min-width: 220px;
}
.filter .hint { color: var(--muted); font-size: 11px; }

.chart-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px; box-shadow: var(--shadow); }
#chart { width: 100%; height: auto; display: block; }
#chart .grid { stroke: var(--border); stroke-width: 1; }
#chart .ylabel { fill: var(--muted); font-size: 11px; text-anchor: end; }
#chart .xlabel { fill: var(--muted); font-size: 11px; }

.legend { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 14px; }
.legend .lg { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 12px; }
.legend .lg i { width: 13px; height: 3px; border-radius: 2px; display: inline-block; }