/* Faultline — instrument-panel UI. All-mono by intent: these pages are served
   from inside the grader binary on an offline box; the terminal IS the brand. */
:root {
  --bg: #101316;
  --panel: #171b1f;
  --panel-2: #1d2226;
  --line: #2a3138;
  --text: #e8e6e1;
  --muted: #8b949e;
  /* Bumped 2026-10-03 (e12 slice 8): the old #566069 measured ~2.7-3.2:1 on
     --bg/--panel/--panel-2 — below WCAG AA (4.5:1) for the normal-weight
     small text it's actually used at (.dim, .fieldnote, table labels). This
     value holds >=4.5:1 against all three while staying visibly lighter
     (lower contrast) than --muted, preserving the two-tier hierarchy. */
  --faint: #838e9a;
  --amber: #f0b429;
  --amber-dim: #8a6a1c;
  --pass: #3fb950;
  --fail: #f85149;
  --info: #79b8ff;
  /* Layer hues are deliberately NOT the verdict colours (green/red/amber mean
     pass/fail/flaky only) — an L3 stage must never look failed before it runs. */
  --l1: #a5b4c8;
  --l2: #c297ff;
  --l3: #4fc1c9;
  --l4: #7aa2f7;
  /* infra_error/flaky_fail are never the user's fault (rule 4) and must never
     read as red. --infra is a muted violet-grey, deliberately desaturated vs
     --l2's brighter lavender so the two never get mistaken for each other. */
  --infra: #9a8cb0;
  --err-border: #6e2a28;
  --err-bg: #241416;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

/* Light theme: same instrument-panel layout, flipped for daylight / print.
   Only the palette custom properties change — every rule reads them. */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f5f2;
    --panel: #ffffff;
    --panel-2: #efece5;
    --line: #d9d4cb;
    --text: #1a1e22;
    --muted: #57606a;
    /* Same AA bump as the dark value above (2026-10-03, e12 slice 8). */
    --faint: #636c76;
    --amber: #a5760a;
    --amber-dim: #c69a34;
    --pass: #1a7f37;
    --fail: #cf222e;
    --info: #0969da;
    --l1: #57606a;
    --l2: #8250df;
    --l3: #1b7c83;
    --l4: #0969da;
    --infra: #6c5c85;
    --err-border: #e6b3ae;
    --err-bg: #fcece9;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { color-scheme: light dark; }

body {
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

::selection { background: var(--amber); color: #14110a; }

a { color: var(--info); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px 96px; }

/* -- masthead ------------------------------------------------------------ */
header.site {
  padding: 28px 0 18px;
  display: flex;
  align-items: baseline;
  gap: 16px;
}
.logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
}
.logo a { color: inherit; }
.logo .tick { color: var(--amber); }
.tagline { color: var(--faint); font-size: 12px; }
nav.site { margin-left: auto; font-size: 14px; }
nav.site a { color: var(--text); opacity: 0.78; margin-left: 26px; padding: 4px 0; border-bottom: 2px solid transparent; }
nav.site a:hover { color: var(--amber); opacity: 1; text-decoration: none; }
nav.site a.here { opacity: 1; border-bottom-color: var(--amber); }
nav.site a.ghostlink { color: var(--faint); }
nav.site a.ghostlink:hover { color: var(--amber); }

/* the fault line: a cracked hairline under the masthead */
.crack {
  height: 7px;
  margin-bottom: 36px;
  background:
    linear-gradient(90deg, var(--line) 0 38%, transparent 38% 40.5%, var(--line) 40.5% 100%) top/100% 1px no-repeat,
    linear-gradient(90deg, transparent 0 38%, var(--amber) 38% 40.5%, transparent 40.5% 100%) 0 3px/100% 1px no-repeat,
    linear-gradient(90deg, transparent 0 40.5%, var(--line) 40.5% 100%) bottom/100% 1px no-repeat;
}

/* -- type ---------------------------------------------------------------- */
h1 { font-size: 22px; font-weight: 700; letter-spacing: 0.01em; margin-bottom: 6px; }
h2 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 40px 0 14px;
}
.sub { color: var(--muted); margin-bottom: 28px; max-width: 62ch; }
.k { color: var(--faint); }

/* -- catalog table ------------------------------------------------------- */
table.catalog { width: 100%; border-collapse: collapse; }
table.catalog th {
  text-align: left;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
  padding: 0 14px 10px;
  border-bottom: 1px solid var(--line);
}
table.catalog td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: baseline;
}
table.catalog tbody tr {
  animation: rise 0.35s ease both;
}
table.catalog tbody tr:nth-child(1) { animation-delay: 0.03s; }
table.catalog tbody tr:nth-child(2) { animation-delay: 0.06s; }
table.catalog tbody tr:nth-child(3) { animation-delay: 0.09s; }
table.catalog tbody tr:nth-child(4) { animation-delay: 0.12s; }
table.catalog tbody tr:nth-child(5) { animation-delay: 0.15s; }
table.catalog tbody tr:nth-child(6) { animation-delay: 0.18s; }
table.catalog tbody tr:hover { background: var(--panel); }
table.catalog tbody tr:hover td:first-child { box-shadow: inset 2px 0 0 var(--amber); }
td.langs { color: var(--faint); font-size: 12px; }

@keyframes rise {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

/* Respect prefers-reduced-motion (benchmark §5 "Motion"): the only motion
   today is this one fade-in, but anchor the rule to the general pattern so
   future motion (pip fill, expand/collapse) picks it up too. */
@media (prefers-reduced-motion: reduce) {
  table.catalog tbody tr { animation: none; }
}

/* -- chips / badges ------------------------------------------------------ */
.chip {
  display: inline-block;
  font-size: 11px;
  padding: 1px 8px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--muted);
  white-space: nowrap;
}
.chip.engine-networked { color: var(--info); border-color: #2c4a66; }
.chip.engine-in-process { color: var(--amber); border-color: var(--amber-dim); }
/* Release-flag badges (RF1): only an admin/beta session ever receives
   release_state at all — a non-privileged caller's catalog/ladder response
   never carries this field for anything it's allowed to see. */
.chip.release-hidden { color: var(--fail); border-color: var(--fail); text-transform: uppercase; }
.chip.release-beta { color: var(--amber); border-color: var(--amber-dim); text-transform: uppercase; }

.layer {
  display: inline-block;
  min-width: 34px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 2px;
  background: var(--panel-2);
  color: var(--muted);
  border: 1px solid var(--line);
}
.layer.l1 { color: var(--l1); }
.layer.l2 { color: var(--l2); }
.layer.l3 { color: var(--l3); }
.layer.l4 { color: var(--l4); }

/* -- ladder -------------------------------------------------------------- */
ol.ladder { list-style: none; }
ol.ladder li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 11px 14px;
  border-left: 1px solid var(--line);
  position: relative;
}
ol.ladder li::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 50%;
  width: 5px;
  height: 1px;
  background: var(--amber);
}
ol.ladder .stage-id { color: var(--faint); min-width: 4ch; }
ol.ladder .diff { margin-left: auto; color: var(--faint); font-size: 12px; }
ol.ladder .mark { min-width: 1ch; color: var(--faint); font-weight: 700; }
ol.ladder li.stage-done .mark { color: var(--pass); }
ol.ladder li.stage-failing { border-left-color: var(--fail); }
ol.ladder li.stage-failing .mark { color: var(--fail); }

/* -- statement / prose panel --------------------------------------------- */
.statement {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 26px 28px;
}
.statement p { margin: 0 0 14px; max-width: 68ch; }
.statement h3 {
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 22px 0 10px;
}
.statement pre {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 12px 14px;
  overflow-x: auto;
  margin: 0 0 14px;
  font-size: 13px;
}
.statement code { color: var(--amber); }
.statement pre code { color: var(--text); }
.statement ul { margin: 0 0 14px 2ch; }
.statement blockquote {
  margin: 0 0 14px;
  padding: 10px 16px;
  border-left: 2px solid var(--amber-dim);
  background: var(--panel-2);
  border-radius: 0 3px 3px 0;
  color: var(--muted);
  max-width: 68ch;
}
.statement blockquote strong { color: var(--amber); }
.statement table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 16px;
  font-size: 13px;
}
.statement th, .statement td {
  text-align: left;
  padding: 7px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.statement th {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 400;
}
.statement td code, .statement th code { color: var(--amber); }

/* -- verdict block (status page) ------------------------------------------ */
form.lookup {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 10px;
  margin-bottom: 28px;
}
form.lookup input {
  font: inherit;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 9px 12px;
}
form.lookup input:focus { outline: 1px solid var(--amber); border-color: var(--amber-dim); }
form.lookup button {
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #14110a;
  background: var(--amber);
  border: none;
  border-radius: 2px;
  padding: 9px 20px;
  cursor: pointer;
}
form.lookup button:hover { filter: brightness(1.08); }

.verdict {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 22px 24px;
  white-space: pre-wrap;
  font-size: 13px;
}
.ok { color: var(--pass); font-weight: 700; }
.bad { color: var(--fail); font-weight: 700; }
.warn { color: var(--amber); font-weight: 700; }
.dim { color: var(--faint); }
/* infra_error: never the user's fault (rule 4) — a deliberate non-red
   treatment distinct from pass/fail/flaky AND from the --l1..l4 layer hues,
   so it reads as "ours to retry," not "you broke something." */
.infra { color: var(--infra); font-weight: 700; }

.err {
  border: 1px solid var(--err-border);
  background: var(--err-bg);
  color: var(--fail);
  border-radius: 3px;
  padding: 12px 16px;
  margin-bottom: 20px;
}

form.lookup button.ghost {
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  font-weight: 400;
}
form.lookup button.ghost:hover { background: var(--panel-2); filter: none; }

/* -- landing ---------------------------------------------------------------- */
.hero { margin: 8px 0 40px; }
.hero h1 { font-size: 26px; line-height: 1.35; margin-bottom: 18px; max-width: 34ch; }
.hero .sub { max-width: 66ch; }
.cta { display: flex; gap: 12px; margin: 26px 0 8px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #14110a;
  background: var(--amber);
  border-radius: 2px;
  padding: 10px 22px;
}
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn.ghost {
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  font-weight: 400;
}
.btn.ghost:hover { background: var(--panel-2); filter: none; color: var(--amber); }

.stats { display: flex; gap: 40px; margin: 36px 0 8px; flex-wrap: wrap; }
.stat { display: grid; }
.stat-n { font-size: 30px; font-weight: 700; color: var(--amber); line-height: 1.1; }
.stat-k {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}

/* -- auth pages (login / signup / reset / account) ------------------------ */
/* One instrument card per credential action; the fault line runs through its
   top edge (same motif as .crack, card-scaled). */
form.auth {
  max-width: 440px;
  display: grid;
  gap: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 28px;
  background-image: linear-gradient(90deg, transparent 0 34%, var(--amber) 34% 44%, transparent 44% 100%);
  background-size: 100% 2px;
  background-repeat: no-repeat;
}
form.auth label {
  display: grid;
  gap: 6px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}
form.auth input {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 9px 12px;
}
form.auth textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 9px 12px;
  resize: vertical;
}
form.auth input:focus, form.auth textarea:focus { outline: 1px solid var(--amber); border-color: var(--amber-dim); }
form.auth button[type="submit"] {
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #14110a;
  background: var(--amber);
  border: none;
  border-radius: 2px;
  padding: 10px 20px;
  cursor: pointer;
  margin-top: 6px;
}
form.auth button[type="submit"]:hover { filter: brightness(1.08); }
form.auth button[type="submit"]:disabled { filter: none; opacity: 0.55; cursor: wait; }
.fieldnote { color: var(--faint); font-size: 12px; letter-spacing: 0; text-transform: none; }
.authlinks { margin-top: 16px; font-size: 12px; color: var(--faint); }

.notice {
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber-dim);
  background: var(--panel-2);
  border-radius: 0 3px 3px 0;
  padding: 12px 16px;
  margin-bottom: 20px;
  color: var(--muted);
  max-width: 62ch;
}
.notice.good { border-left-color: var(--pass); }

details.alt { margin-top: 28px; max-width: 440px; }
details.alt summary { cursor: pointer; color: var(--faint); font-size: 12px; }
details.alt summary:hover { color: var(--amber); }
details.alt form.auth { margin-top: 14px; }

footer.site {
  margin-top: 72px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 12px;
}

/* -- narrow viewports ---------------------------------------------------- */
@media (max-width: 620px) {
  .wrap { padding: 0 14px 64px; }
  header.site { flex-wrap: wrap; gap: 6px 14px; padding-top: 20px; }
  nav.site { margin-left: 0; width: 100%; }
  nav.site a:first-child { margin-left: 0; }
  form.lookup { grid-template-columns: 1fr; }
  table.catalog th:nth-child(4), table.catalog td.langs { display: none; }
  table.catalog td, table.catalog th { padding-left: 8px; padding-right: 8px; }
  .statement { padding: 20px 18px; }
  h1 { font-size: 20px; }
}

/* statement heading anchors (linkable sections) */
.statement h3 .anchor { color: var(--faint); text-decoration: none; font-weight: 400; visibility: hidden; }
.statement h3:hover .anchor { visibility: visible; }