:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1c2330;
  --muted: #687385;
  --line: #e3e7ee;
  --accent: #2f6fde;
  --accent-text: #ffffff;
  --ok: #1f8a4c;
  --warn: #a36500;
  --err: #c43d3d;
  --ok-bg: #e6f4ec;
  --warn-bg: #fdf3e1;
  --err-bg: #fbe9e9;
  --chip: #eef1f6;
  --row-hover: #f8fafc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161d;
    --panel: #1a2029;
    --text: #e4e8ef;
    --muted: #8d97a8;
    --line: #2a3240;
    --accent: #5b93f0;
    --accent-text: #0d1117;
    --ok: #4cc27c;
    --warn: #e6a53a;
    --err: #ef7474;
    --ok-bg: #173022;
    --warn-bg: #33270f;
    --err-bg: #3a1c1c;
    --chip: #252d3a;
    --row-hover: #1f2631;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  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; }
h1 { font-size: 22px; margin: 0 0 12px; }
h2 { font-size: 16px; margin: 0 0 8px; }
main { max-width: 1400px; margin: 0 auto; padding: 20px 16px 48px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; }
.nowrap { white-space: nowrap; }
.ok-text { color: var(--ok); }
.err-text { color: var(--err); }

/* Top bar */
.topbar {
  display: flex; align-items: center; gap: 24px;
  padding: 0 16px; height: 52px;
  background: var(--panel); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 5;
}
.brand { font-weight: 700; font-size: 17px; letter-spacing: -0.2px; }
.brand span { color: var(--accent); font-weight: 500; margin-left: 2px; }
.brand.big { font-size: 26px; }
.topbar nav { display: flex; gap: 4px; flex: 1; }
.topbar nav a, .who > a {
  color: var(--text); padding: 6px 10px; border-radius: 6px;
}
.topbar nav a:hover, .who > a:hover { background: var(--chip); text-decoration: none; }
.topbar a.active { background: var(--chip); font-weight: 600; }
.who { display: flex; align-items: center; gap: 8px; }
.who form { margin: 0; }

/* Controls */
button {
  font: inherit; cursor: pointer;
  border: 1px solid var(--line); background: var(--panel); color: var(--text);
  padding: 7px 12px; border-radius: 6px;
}
button:hover { border-color: var(--muted); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.danger { background: var(--err); border-color: var(--err); color: #fff; font-weight: 600; }
button.small { padding: 4px 9px; font-size: 12px; }
button.link { border: 0; background: none; color: var(--muted); padding: 6px; }
button.link:hover { color: var(--text); }
button.wide { width: 100%; }
button:disabled { opacity: .5; cursor: default; }
input, select, textarea {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px; padding: 7px 9px;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
label { display: block; margin: 10px 0; font-weight: 500; }
label input, label select { display: block; width: 100%; margin-top: 4px; font-weight: 400; }
label.inline { display: inline-flex; align-items: center; gap: 5px; margin: 0; font-weight: 400; }
label.inline input { display: inline; width: auto; margin: 0; }

/* Layout pieces */
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px; margin-bottom: 16px;
}
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.filters { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.filters input[type=search] { width: 260px; max-width: 100%; }
.page-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.refresh { display: flex; gap: 12px; align-items: center; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.two-col .card { margin-bottom: 16px; }
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } }
.narrow { max-width: 460px; }

.tiles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-bottom: 16px; }
@media (max-width: 900px) { .tiles { grid-template-columns: repeat(2, 1fr); } }
.tile { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.tile .label { color: var(--muted); font-size: 12px; }
.tile .value { font-size: 24px; font-weight: 650; font-variant-numeric: tabular-nums; }
.tile.warn .value { color: var(--warn); }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; color: var(--muted); font-weight: 600; white-space: nowrap; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr:hover { background: var(--row-hover); }
tr.group td { background: var(--bg); font-weight: 650; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
tr.detail td { background: var(--bg); }
td.actions { white-space: nowrap; text-align: right; }
td.actions button { margin-left: 4px; }
.empty { color: var(--muted); padding: 14px 8px; }
.err-snippet { color: var(--muted); font-size: 12px; max-width: 360px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.tag {
  display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px;
  background: var(--chip); white-space: nowrap;
}
.tag.ok { background: var(--ok-bg); color: var(--ok); }
.tag.warn { background: var(--warn-bg); color: var(--warn); }
.tag.err { background: var(--err-bg); color: var(--err); }

.alert { padding: 10px 12px; border-radius: 8px; margin: 10px 0; }
.alert.error { background: var(--err-bg); color: var(--err); }
.alert.warn { background: var(--warn-bg); color: var(--warn); }
.alert.ok { background: var(--ok-bg); color: var(--ok); }

.auth-card {
  max-width: 360px; margin: 10vh auto; background: var(--panel);
  border: 1px solid var(--line); border-radius: 12px; padding: 28px;
}
.auth-card form { margin-top: 12px; }

/* Dialog */
dialog {
  border: 1px solid var(--line); border-radius: 12px; padding: 0;
  background: var(--panel); color: var(--text); width: min(480px, calc(100vw - 32px));
}
dialog::backdrop { background: rgb(0 0 0 / .45); }
dialog form { padding: 20px; margin: 0; }
dialog h2 { margin-bottom: 4px; }
dialog .buttons { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
dialog .note { font-size: 12px; color: var(--muted); }

/* Bounces page */
.test-row { display: flex; gap: 8px; }
.test-row input { flex: 1; min-width: 0; }
.result { margin-top: 10px; padding: 10px 12px; border-radius: 8px; background: var(--bg); }
.pattern { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; word-break: break-all; }
.stats { display: flex; gap: 18px; flex-wrap: wrap; margin: 8px 0; }
.stats div { font-variant-numeric: tabular-nums; }
.stats b { font-size: 18px; display: block; }
tr.disabled td { opacity: .55; }
dialog textarea { width: 100%; }
.preview { max-height: 220px; overflow: auto; margin-top: 8px; font-size: 12px; }
.arrow { color: var(--muted); padding: 0 4px; }

/* ISP rules page */
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin-top: 10px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-variant-numeric: tabular-nums; }
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
@media (max-width: 600px) { .settings-grid { grid-template-columns: 1fr; } }
dialog.wide { width: min(760px, calc(100vw - 32px)); }
.auto-row { border: 1px solid var(--line); border-radius: 8px; padding: 10px; margin: 8px 0; }
.auto-row .row { display: flex; gap: 8px; flex-wrap: wrap; align-items: end; }
.auto-row .row label { flex: 1; min-width: 120px; margin: 4px 0; }
.auto-row textarea { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; }
fieldset { border: 1px solid var(--line); border-radius: 8px; margin: 10px 0; padding: 4px 12px 10px; }
legend { color: var(--muted); font-size: 12px; padding: 0 4px; }
.chips span { margin: 0 4px 4px 0; }

/* Time zone switch (top bar) */
.tz { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.tz button { border: 0; border-radius: 0; padding: 4px 10px; font-size: 12px; background: var(--panel); color: var(--muted); }
.tz button + button { border-left: 1px solid var(--line); }
.tz button.active { background: var(--chip); color: var(--text); font-weight: 600; }
time { font-variant-numeric: tabular-nums; }

/* Reports & charts. Categorical slots (validated light on #fff, dark on #1a2029). */
:root {
  --series-1: #2a78d6; --series-2: #eb6834; --series-3: #1baf7a; --series-4: #eda100; --series-5: #e87ba4;
}
@media (prefers-color-scheme: dark) {
  :root { --series-1: #3987e5; --series-2: #d95926; --series-3: #199e70; --series-4: #c98500; --series-5: #d55181; }
}
.filter-row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; padding: 6px 12px; background: var(--panel); color: var(--muted); }
.seg button + button { border-left: 1px solid var(--line); }
.seg button.active { background: var(--chip); color: var(--text); font-weight: 600; }
.tiles.six { grid-template-columns: repeat(6, 1fr); }
@media (max-width: 1000px) { .tiles.six { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 600px) { .tiles.six { grid-template-columns: repeat(2, 1fr); } }
.tiles.six .tile .value { font-variant-numeric: normal; }
#report.loading { opacity: .55; transition: opacity .15s; }
.chart-wrap { position: relative; }
.chart { display: block; overflow: visible; }
.chart:focus { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .axis { stroke: var(--muted); stroke-opacity: .5; stroke-width: 1; }
.chart .tick { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart .line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .dot { stroke: var(--panel); stroke-width: 2; }
.chart .crosshair { stroke: var(--muted); stroke-width: 1; }
.chart .hit { fill: transparent; cursor: crosshair; }
.chart-tip {
  position: absolute; top: 4px; pointer-events: none; z-index: 2; min-width: 150px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px;
  box-shadow: 0 4px 16px rgb(0 0 0 / .12); font-size: 12px;
}
.chart-tip .tip-title { color: var(--muted); margin-bottom: 4px; }
.chart-tip .tip-row { display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.chart-tip b { font-variant-numeric: tabular-nums; }
.key-line { display: inline-block; width: 14px; height: 2px; border-radius: 1px; margin-right: 6px; vertical-align: middle; }
.key-box { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; vertical-align: middle; }
.legend { display: flex; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 12px; margin-bottom: 6px; }
caption.legend { caption-side: bottom; justify-content: flex-start; padding-top: 8px; }
details summary { cursor: pointer; color: var(--muted); margin-top: 8px; }
.bars { display: grid; gap: 8px; }
.bar-row { display: grid; grid-template-columns: minmax(110px, 30%) 1fr auto; gap: 10px; align-items: center; }
.bar-label { font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-track { height: 12px; }
.bar { display: block; height: 12px; background: var(--series-1); border-radius: 0 4px 4px 0; min-width: 2px; }
.bar-value { font-size: 12px; font-variant-numeric: tabular-nums; color: var(--text); }
.mix { display: flex; gap: 2px; width: 120px; height: 10px; }
.mix span { border-radius: 2px; min-width: 2px; }

/* Layout fixes: grid items must be allowed to shrink below their content width */
.two-col > *, .tiles > * { min-width: 0; }
td .resp { display: block; min-width: 260px; max-width: 640px; font-size: 12px; overflow-wrap: anywhere; }

/* Top bar on narrow screens: wrap, and let the menu scroll sideways */
@media (max-width: 760px) {
  .topbar { flex-wrap: wrap; height: auto; gap: 6px 12px; padding: 8px 16px; }
  .topbar nav { order: 3; flex-basis: 100%; overflow-x: auto; white-space: nowrap; }
  .topbar nav a { flex: none; }
  .who { margin-left: auto; }
  .filter-row .seg { overflow-x: auto; max-width: 100%; }
  .seg button { white-space: nowrap; }
}