:root {
  color-scheme: light;
  --bg: #F4F2EC; --card: #FFFFFF; --line: #E2DDD0; --line-soft: #EFEBE2; --head: #F8F6F1;
  --ink: #1C2230; --muted: #525C6E; --faint: #8C95A3;
  --accent: #A4500F; --link: #1F5A85; --nav-active: #2E3A50;
  --ok-bg: #E8F0E6; --ok-ink: #2F5E2B;
  --warn-bg: #FBF3DD; --warn-ink: #7A5A0C;
  --hot-bg: #FBE3DD; --hot-ink: #9A2E17;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --bg: #15171c; --card: #1d2027; --line: #2d313b; --line-soft: #262a33; --head: #22262e;
    --ink: #EEF0F4; --muted: #AEB5C2; --faint: #7F8796; --accent: #E08A45; --link: #7FB2E0; --nav-active: #4a6184;
    --ok-bg: #1F3B22; --ok-ink: #A9D4A0;
    --warn-bg: #3A3015; --warn-ink: #E9CF7A;
    --hot-bg: #3F1E14; --hot-ink: #F3A79A;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: 'IBM Plex Sans', 'Segoe UI', Arial, sans-serif; font-size: 15px; line-height: 1.5; }

/* ── header ── */
.top { background: var(--card); border-bottom: 1px solid var(--line); padding: 10px 20px;
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.top .brand { font-weight: 700; font-size: 17px; color: var(--ink); text-decoration: none; }
.top .brand span { color: var(--muted); font-weight: 500; margin-left: 8px; }
.top nav { display: flex; gap: 6px; flex-wrap: wrap; }
.top nav a { color: var(--muted); text-decoration: none; padding: 6px 12px; border-radius: 4px; font-size: 14px; }
.top nav a:hover { background: var(--line-soft); }
.top nav a.on { background: var(--nav-active); color: #fff; }
.top nav a b { font-weight: 600; }
.top .hdr-right { margin-left: auto; }

main { max-width: 1000px; margin: 0 auto; padding: 20px; display: flex; flex-direction: column; gap: 16px; }

/* ── layout ── */
.card { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 18px 20px; }
.card .head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.card h1 { margin: 0 0 4px; font-size: 20px; }
.card h2 { margin: 0 0 6px; font-size: 16px; }
.lead { color: var(--muted); margin: 6px 0; }

/* ── small + muted ── */
.small { font-size: 13px; }
.muted { color: var(--muted); }
a { color: var(--link); }

/* ── overview tiles ── */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 14px 16px; text-decoration: none; color: var(--ink); display: block; }
.tile:hover { border-color: var(--muted); }
.tile.ok { border-left: 4px solid var(--ok-ink); }
.tile.warn { border-left: 4px solid var(--warn-ink); background: var(--warn-bg); }
.tile .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.3px; }
.tile .num { font-size: 28px; font-weight: 700; margin-top: 4px; }
.tile .foot { color: var(--muted); font-size: 12px; margin-top: 2px; }

/* ── tables ── */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--head); font-weight: 600; font-size: 13px; }
.r { text-align: right; }
.mono { font-variant-numeric: tabular-nums; font-family: 'IBM Plex Mono', monospace; }
table.kv th { background: transparent; width: 160px; color: var(--muted); font-weight: 500; }

/* ── form ── */
.row { display: flex; gap: 8px; margin-top: 8px; align-items: center; flex-wrap: wrap; }
.row input[type="url"], .row input[type="text"], .row input[type="number"] { flex: 1; padding: 8px 10px; border: 1px solid var(--line); border-radius: 4px; background: var(--card); color: var(--ink); font: inherit; }
.btn { padding: 7px 13px; background: var(--ink); color: var(--card); border: 0; border-radius: 4px; font: inherit; cursor: pointer; text-decoration: none; display: inline-block; }
.btn.sec { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn:hover { opacity: 0.9; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

ul { padding-left: 20px; }

/* ── badges & callouts ── */
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; background: var(--head); border: 1px solid var(--line); white-space: nowrap; }
.badge.ok { background: var(--ok-bg); color: var(--ok-ink); border-color: transparent; }
.badge.warn { background: var(--warn-bg); color: var(--warn-ink); border-color: transparent; }
.badge.err { background: var(--hot-bg); color: var(--hot-ink); border-color: transparent; }
.err { padding: 10px 12px; background: var(--hot-bg); color: var(--hot-ink); border-radius: 4px; }
.ok { padding: 10px 12px; background: var(--ok-bg); color: var(--ok-ink); border-radius: 4px; }
.warn { padding: 10px 12px; background: var(--warn-bg); color: var(--warn-ink); border-radius: 4px; }