:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --text: #121620;
  --muted: #5a6372;
  --faint: #8a93a3;
  --border: #e1e5eb;
  --accent: #0a66c2;
  --accent-ink: #ffffff;
  --accent-soft: #e7f0fa;
  --ok: #17784a;
  --ok-soft: #e2f3e9;
  --warn: #8f5500;
  --warn-soft: #fbefd9;
  --bad: #b3261e;
  --bad-soft: #fce8e6;
  --v4: #0a66c2;
  --v6: #7a3fc4;
  --radius: 14px;
  --radius-small: 8px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 2px 6px rgba(16, 24, 40, .05);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1016;
    --surface: #141a22;
    --surface-2: #1b222c;
    --text: #e7ecf2;
    --muted: #9ba6b4;
    --faint: #6f7a88;
    --border: #28313c;
    --accent: #5aa2ff;
    --accent-ink: #0c1016;
    --accent-soft: #14263c;
    --ok: #4cc38a;
    --ok-soft: #12291e;
    --warn: #e5ac4b;
    --warn-soft: #2e2412;
    --bad: #f2756b;
    --bad-soft: #321816;
    --v4: #5aa2ff;
    --v6: #b48cf2;
    --shadow: none;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

code, pre { font-family: var(--mono); font-size: .92em; }

h1, h2, h3 { line-height: 1.2; margin: 0; }

[hidden] { display: none !important; }

.wrap {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Header and footer */

.masthead {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.masthead-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 650;
  text-decoration: none;
  letter-spacing: -.01em;
}
.brand .tld { color: var(--muted); font-weight: 500; }

.nav { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: .95rem; }
.nav a { color: var(--muted); text-decoration: none; padding: 2px 0; }
.nav a:hover { color: var(--text); }
.nav a[aria-current="page"] { color: var(--text); font-weight: 600; box-shadow: inset 0 -2px 0 var(--accent); }

main.wrap { flex: 1; padding-top: 36px; padding-bottom: 48px; }

.footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .9rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 18px;
  padding-bottom: 18px;
}

/* Intro */

.intro { margin-bottom: 24px; }
.intro h1 { font-size: clamp(1.75rem, 1.2rem + 2.4vw, 2.6rem); letter-spacing: -.02em; }
.lede { color: var(--muted); margin: 10px 0 0; max-width: 62ch; font-size: 1.05rem; }
.lede strong { color: var(--text); font-weight: 600; }

/* Cards */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 22px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  border-top: 3px solid var(--fam, var(--accent));
}
.card[data-family="4"] { --fam: var(--v4); }
.card[data-family="6"] { --fam: var(--v6); }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.card-head h2 { font-size: 1rem; color: var(--fam); letter-spacing: .02em; }

.tag {
  font-size: .78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  white-space: nowrap;
}
.tag-accent { background: var(--accent-soft); color: var(--accent); }
.tag-ok { background: var(--ok-soft); color: var(--ok); }
.tag-bad { background: var(--bad-soft); color: var(--bad); }

.label {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--faint);
  margin-bottom: 4px;
}

.hostname {
  margin: 0 0 6px;
  font-size: clamp(1.2rem, 1rem + 1vw, 1.6rem);
  font-weight: 650;
  letter-spacing: -.01em;
  overflow-wrap: anywhere;
  min-height: 1.2em;
}
.hostname-small { font-size: 1rem; font-weight: 500; color: var(--muted); min-height: 1.55em; }
.none { color: var(--faint); font-weight: 500; font-style: italic; }

.verify { margin: 0 0 16px; min-height: 1.5em; }

.badge {
  display: inline-block;
  font-size: .78rem;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 999px;
  cursor: help;
}
.badge-ok { background: var(--ok-soft); color: var(--ok); }
.badge-warn { background: var(--warn-soft); color: var(--warn); }

.ip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin: 0 0 16px;
}
.ip code {
  font-size: 1.15rem;
  font-weight: 600;
  overflow-wrap: anywhere;
  min-width: 0;
}
.ip-large { margin-bottom: 4px; }
.ip-large code { font-size: clamp(1.25rem, 1rem + 1.2vw, 1.7rem); }

.copy {
  font: inherit;
  font-size: .8rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  padding: 3px 10px;
  cursor: pointer;
}
.copy:hover { color: var(--text); }

.card-foot {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  font-size: .9rem;
}

.card.off { opacity: .55; }

.stats {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1.25fr) minmax(0, .8fr);
  gap: 12px;
  margin: 12px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.stats dt { font-size: .75rem; color: var(--faint); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; }
.stats dd { margin: 2px 0 0; font-size: .92rem; font-variant-numeric: tabular-nums; }

/* Call to action */

.cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px 24px;
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 20px;
}
.cta h2 { font-size: 1.15rem; margin-bottom: 4px; }
.cta p { margin: 0; color: var(--muted); max-width: 60ch; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font: inherit;
  font-weight: 600;
  line-height: 1.2;
  color: var(--accent-ink);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 11px 18px;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.button:hover { filter: brightness(1.08); text-decoration: none; }
.button-small { padding: 7px 13px; font-size: .9rem; border-radius: var(--radius-small); }
.button-quiet { background: var(--surface); color: var(--text); border-color: var(--border); }
.button-danger { background: var(--surface); color: var(--bad); border-color: var(--border); }
.button-quiet:hover, .button-danger:hover { filter: none; background: var(--surface-2); }

/* Panels */

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  margin-bottom: 20px;
  min-width: 0;
  scroll-margin-top: 130px; /* clear of the sticky toolbar on the Watch page */
}
.panel > h2, .panel-head h2 { font-size: 1.15rem; margin-bottom: 12px; }
.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-bottom: 14px;
}
.panel-head h2 { margin-bottom: 4px; }
.panel-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.hint { color: var(--muted); font-size: .9rem; margin: 0; }
.panel > .hint { margin-top: 12px; }
.empty { color: var(--faint); margin: 8px 0 0; font-style: italic; }

.prose { max-width: none; }
.prose h2:not(:first-child) { margin-top: 24px; }
.prose p { margin: 0 0 12px; max-width: 72ch; }

.notice pre {
  background: var(--surface-2);
  border-radius: var(--radius-small);
  padding: 12px 14px;
  overflow-x: auto;
}

.link-list { list-style: none; margin: 0; padding: 0; }
.link-list li {
  display: grid;
  grid-template-columns: minmax(150px, 220px) 1fr;
  gap: 4px 16px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
}
.link-list li:first-child { border-top: 0; padding-top: 0; }
.link-list li > span:last-child { color: var(--muted); font-size: .95rem; }
.link-list a { font-weight: 600; }
.pair { color: var(--muted); }

/* Tables */

.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { text-align: left; padding: 9px 12px 9px 0; border-top: 1px solid var(--border); vertical-align: top; }
th { font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--faint); font-weight: 600; border-top: 0; white-space: nowrap; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.api-table td:first-child { white-space: nowrap; width: 1%; padding-right: 24px; }
.api-table tr:first-child td { border-top: 0; }

.history td { white-space: nowrap; font-variant-numeric: tabular-nums; }
.history td.host { white-space: normal; overflow-wrap: anywhere; min-width: 26ch; color: var(--muted); }
.history td.addr code { font-weight: 600; }
.history tr.current td:first-child { box-shadow: inset 3px 0 0 var(--ok); padding-left: 10px; }
.history tr.fail td.addr { color: var(--bad); font-weight: 600; }
.history tr.fail td.host { color: var(--bad); }
.history td:first-child { padding-left: 10px; }
.history th:first-child { padding-left: 10px; }

.fam {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 6px;
  color: var(--fam);
  background: color-mix(in srgb, var(--fam) 13%, transparent);
}
.fam-4 { --fam: var(--v4); }
.fam-6 { --fam: var(--v6); }

.mark-ok { color: var(--ok); font-weight: 700; margin-left: 4px; cursor: help; }

/* Watch page toolbar */

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px 16px;
  margin-bottom: 16px;
  position: sticky;
  top: 8px;
  z-index: 2;
}

.status { display: flex; align-items: center; gap: 10px; font-weight: 600; font-variant-numeric: tabular-nums; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--faint); flex: none; }
.dot.live { background: var(--ok); box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 60%, transparent); animation: pulse 2s infinite; }
.dot.problem { background: var(--bad); }
.dot.paused { background: var(--warn); }

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 55%, transparent); }
  70% { box-shadow: 0 0 0 8px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
@media (prefers-reduced-motion: reduce) { .dot.live { animation: none; } }

.controls { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 16px; font-size: .92rem; }
.alerts-hint { flex-basis: 100%; }
.field-inline { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); }
.check { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; margin: 0; }

select {
  font: inherit;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  padding: 5px 8px;
}

button:focus-visible, a:focus-visible, select:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Share of checks */

.summary { display: grid; gap: 18px; }
.share-group h3 { font-size: .85rem; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.share-group h3 .count { color: var(--faint); font-weight: 500; }
.share-row {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(80px, 2fr) 3.2em minmax(0, 1.3fr);
  align-items: center;
  gap: 12px;
  padding: 5px 0;
  font-size: .92rem;
}
.share-row code { font-weight: 600; overflow-wrap: anywhere; }
.share-row.fail code { color: var(--bad); font-family: var(--font); }
.bar { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--fam, var(--accent)); border-radius: 999px; transition: width .3s ease; }
.share-row.fail .bar > span { background: var(--bad); }
.pct { text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; }
.share-meta { color: var(--muted); font-size: .85rem; font-variant-numeric: tabular-nums; }

@media (max-width: 640px) {
  main.wrap { padding-top: 24px; }
  .card, .panel, .cta { padding: 18px 16px; }
  .link-list li { grid-template-columns: 1fr; }
  .share-row { grid-template-columns: minmax(0, 1fr) 3.2em; }
  .share-row .bar { grid-column: 1 / -1; grid-row: 2; }
  .share-row .share-meta { grid-column: 1 / -1; }
  .toolbar { position: static; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}