/* surfer UI. System fonts only; light and dark via prefers-color-scheme. */
:root {
  color-scheme: light dark;
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-2: #eef2f7;
  --text: #17202b;
  --muted: #4a5868;
  --border: #c9d2dd;
  --accent: #0b5fa5;
  --accent-text: #ffffff;
  --accent-soft: #e1eefa;
  --danger: #a4161a;
  --danger-soft: #fbe6e6;
  --warn: #7a4b00;
  --warn-soft: #fdf0d5;
  --ok: #17692f;
  --ok-soft: #e0f4e6;
  --focus: #0b5fa5;
  --radius: 8px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e141b;
    --surface: #161e28;
    --surface-2: #1d2733;
    --text: #e8edf3;
    --muted: #a9b6c5;
    --border: #364354;
    --accent: #5aa9f0;
    --accent-text: #08121d;
    --accent-soft: #14304b;
    --danger: #ff8a8a;
    --danger-soft: #3d1a1c;
    --warn: #f0c070;
    --warn-soft: #3a2c10;
    --ok: #7bd694;
    --ok-soft: #14301d;
    --focus: #8cc4ff;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.5 var(--font);
  min-height: 100vh;
  overflow-wrap: anywhere;
}
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 1rem; }
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
code, .mono { font-family: var(--mono); font-size: .92em; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 3px; }
[hidden] { display: none !important; }

.skip-link {
  position: absolute; left: .5rem; top: -4rem; z-index: 100;
  background: var(--accent); color: var(--accent-text);
  padding: .5rem .9rem; border-radius: var(--radius); text-decoration: none;
}
.skip-link:focus { top: .5rem; }
.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0;
}

/* Header and navigation */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.bar {
  max-width: 76rem; margin: 0 auto; padding: .6rem 1rem;
  display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.25rem;
}
.brand { display: inline-flex; align-items: center; gap: .5rem; font-weight: 700; font-size: 1.15rem; color: var(--text); text-decoration: none; }
.brand img { width: 1.6rem; height: 1.6rem; }
.nav { display: flex; flex-wrap: wrap; gap: .25rem; margin: 0; padding: 0; list-style: none; flex: 1 1 auto; }
.nav a {
  display: inline-block; padding: .45rem .8rem; border-radius: var(--radius);
  color: var(--text); text-decoration: none; font-weight: 500;
}
.nav a:hover { background: var(--surface-2); }
.nav a[aria-current="page"] { background: var(--accent-soft); color: var(--text); box-shadow: inset 0 -3px 0 var(--accent); }
.who { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; color: var(--muted); font-size: .9rem; }
.who strong { color: var(--text); font-weight: 600; }

main { max-width: 76rem; margin: 0 auto; padding: 1.25rem 1rem 3rem; }
main:focus { outline: none; }
.page-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem; margin-bottom: 1rem; }
.page-head h1 { margin: 0; }
.lede { color: var(--muted); max-width: 46rem; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }

/* Cards, panels */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; margin-bottom: 1rem; }
.card > :last-child { margin-bottom: 0; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  min-height: 2.5rem; padding: .45rem 1rem; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--surface-2); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-primary:hover { background: var(--accent); filter: brightness(1.1); }
.btn-danger { color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: var(--danger-soft); }
.btn-solid-danger { background: var(--danger); border-color: var(--danger); color: var(--bg); }
.btn-solid-danger:hover { background: var(--danger); filter: brightness(1.1); }
.btn-sm { min-height: 2.25rem; padding: .25rem .7rem; font-size: .9rem; }
.btn-lg { min-height: 3rem; padding: .6rem 1.4rem; font-size: 1.05rem; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; }
.btn-row { display: flex; flex-wrap: wrap; gap: .5rem; }

/* Forms */
.field { display: flex; flex-direction: column; gap: .25rem; min-width: 0; }
.field label, .field .label { font-weight: 600; font-size: .9rem; }
.hint { color: var(--muted); font-size: .85rem; }
input[type="text"], input[type="email"], input[type="search"], select {
  min-height: 2.5rem; padding: .4rem .6rem; border-radius: var(--radius);
  border: 1px solid var(--muted); background: var(--surface); color: var(--text); font: inherit; max-width: 100%;
}
.hint[role="alert"]:not(:empty) { color: var(--danger); font-weight: 600; }
::placeholder { color: var(--muted); opacity: 1; }
.check { display: flex; gap: .6rem; align-items: flex-start; }
.check input { width: 1.25rem; height: 1.25rem; margin-top: .2rem; flex: none; accent-color: var(--accent); }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); gap: .75rem 1rem; align-items: end; }
.form-stack { display: grid; gap: .9rem; max-width: 36rem; }
.form-grid .check { min-height: 2.5rem; align-items: center; }
.form-grid .check input { margin-top: 0; }
.form-grid > .btn-row { grid-column: 1 / -1; }
.form-stack > :empty { margin: -.9rem 0; }
.field label > input[type="checkbox"] { width: 1.25rem; height: 1.25rem; margin: 0 .4rem 0 0; vertical-align: -.25rem; accent-color: var(--accent); }
.inline-form { display: flex; flex-wrap: wrap; gap: .75rem; align-items: end; }

/* Messages and states */
.notice { border: 1px solid var(--border); border-left-width: 5px; border-radius: var(--radius); padding: .7rem .9rem; margin-bottom: 1rem; background: var(--surface); }
.notice-error { border-color: var(--danger); background: var(--danger-soft); }
.notice-warn { border-color: var(--warn); background: var(--warn-soft); }
.notice-ok { border-color: var(--ok); background: var(--ok-soft); }
.notice > :last-child { margin-bottom: 0; }
.state { text-align: center; padding: 2.5rem 1rem; color: var(--muted); }
.state h2 { color: var(--text); }
.spinner {
  display: inline-block; width: 1.4rem; height: 1.4rem; border-radius: 50%;
  border: 3px solid var(--border); border-top-color: var(--accent);
  animation: spin 0.9s linear infinite; vertical-align: -.3rem; margin-right: .5rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Badges */
.badge {
  display: inline-block; padding: .05rem .5rem; border-radius: 999px; font-size: .8rem; font-weight: 600;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text); white-space: nowrap; line-height: 1.5;
}
.badge-type { background: var(--accent-soft); border-color: var(--accent); }
.badge-ok { background: var(--ok-soft); border-color: var(--ok); color: var(--ok); }
.badge-warn { background: var(--warn-soft); border-color: var(--warn); color: var(--warn); }
.badge-err { background: var(--danger-soft); border-color: var(--danger); color: var(--danger); }
.badge-new { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.badge-tag { background: transparent; border-style: dashed; color: var(--muted); font-weight: 500; }
.badges { display: flex; flex-wrap: wrap; gap: .25rem; }

/* Tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr)); gap: .75rem; margin: 0 0 1rem; padding: 0; list-style: none; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: .6rem .8rem; }
.tile .n { display: block; font-size: 1.6rem; font-weight: 700; line-height: 1.2; }
.tile .l { color: var(--muted); font-size: .85rem; }

/* Tables */
.table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
caption { text-align: left; padding: .6rem .8rem; color: var(--muted); font-size: .9rem; }
th, td { text-align: left; padding: .55rem .8rem; border-top: 1px solid var(--border); vertical-align: top; }
td[data-label="First seen"], td[data-label="Last seen"], td[data-label="Confidence"] { white-space: nowrap; }
thead th { border-top: 0; background: var(--surface-2); font-size: .85rem; white-space: nowrap; }
tbody tr.wildcard td:first-child { border-left: 4px dashed var(--warn); }
tr.detail td { background: var(--surface-2); }
.fqdn { font-family: var(--mono); font-size: .92em; font-weight: 600; }
.expander {
  all: unset; box-sizing: border-box; cursor: pointer; color: var(--accent);
  font-family: var(--mono); font-weight: 600; text-decoration: underline; text-underline-offset: 2px;
}
.expander:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.expander::before { content: "\25B8\00a0"; display: inline-block; }
.expander[aria-expanded="true"]::before { content: "\25BE\00a0"; }
.detail-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1rem; }
.detail-grid h4 { margin: 0 0 .25rem; font-size: .85rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.detail-grid ul { margin: 0; padding-left: 1.1rem; }

progress { width: 100%; max-width: 12rem; height: .9rem; accent-color: var(--accent); }

/* Runs */
.run-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; }
.run { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.run > summary { cursor: pointer; padding: .7rem .9rem; display: grid; grid-template-columns: 6.75rem 1fr; gap: .25rem .9rem; align-items: center; }
.run > summary > :nth-child(3) { grid-column: 2; }
.run > summary:hover { background: var(--surface-2); border-radius: var(--radius); }
.run .body { padding: 0 .9rem .9rem; }
.run-meta { color: var(--muted); font-size: .88rem; }

/* Landing */
.hero { max-width: 52rem; margin: 0 auto; padding: 3rem 1rem 1.5rem; }
.hero h1 { font-size: 2.2rem; margin-bottom: 1rem; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; max-width: 76rem; margin: 0 auto; padding: 0 1rem 2rem; list-style: none; }
.features li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; }
.prose { max-width: 46rem; }
.prose ul { padding-left: 1.2rem; }
.site-footer { max-width: 76rem; margin: 0 auto; padding: 1rem; color: var(--muted); font-size: .9rem; border-top: 1px solid var(--border); }

/* Dialog */
dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 1.25rem; max-width: min(30rem, calc(100vw - 2rem)); }
dialog::backdrop { background: rgb(0 0 0 / .55); }
dialog h2 { margin-bottom: .5rem; }
dialog .btn-row { margin-top: 1.25rem; }

/* Narrow screens: tables become stacked cards */
@media (max-width: 720px) {
  main { padding: 1rem .75rem 2.5rem; }
  .bar { padding: .5rem .75rem; gap: .35rem 1rem; }
  .nav a { padding: .35rem .65rem; }
  .tiles { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .5rem; }
  .tile { padding: .45rem .6rem; }
  .tile .n { font-size: 1.3rem; }
  .tile .l { font-size: .8rem; }
  .stack-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .stack-table caption { display: block; width: 100%; }
  .stack-table, .stack-table tbody, .stack-table tr, .stack-table td { display: block; width: 100%; }
  .stack-table tr { border-top: 1px solid var(--border); padding: .4rem 0; }
  .stack-table tbody tr:first-child { border-top: 0; }
  .stack-table td { border: 0; padding: .2rem .8rem; }
  .stack-table td[data-label]::before { content: attr(data-label); display: block; font-size: .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
  .hero h1 { font-size: 1.7rem; }
  .btn-row .btn { flex: 1 1 auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition: none !important; scroll-behavior: auto !important; }
}
@media (forced-colors: active) {
  .badge, .btn, .tile, .card { border: 1px solid CanvasText; }
}