/*
  judgekeeper website styles. Plain CSS, no build step.

  Brand: navy #1E293B (the AI judge) and green #10B981 (the human), from the split-shield
  logo. Green #10B981 is too light for small text on white, so text and links use a darker
  green (--accent-text) that meets WCAG AA contrast. The theme follows the system setting.
*/

:root {
  --navy: #1E293B;
  --green: #10B981;
  --red: #DC2626;
  --amber: #B45309;
  --bg: #FFFFFF;
  --bg-soft: #F8FAFC;
  --surface: #FFFFFF;
  --line: #E2E8F0;
  --text: #0F172A;
  --muted: #475569;
  --accent-text: #047857;
  --link: #1D4ED8;
  --code-bg: #F1F5F9;
  --pass: #047857;
  --fail: #B91C1C;
  --pass-bg: #D1FAE5;
  --fail-bg: #FEE2E2;
  --warn-bg: #FEF3C7;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 4px 16px rgba(15, 23, 42, 0.06);
  --radius: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B1120;
    --bg-soft: #0F172A;
    --surface: #111827;
    --line: #1F2A3D;
    --text: #E2E8F0;
    --muted: #94A3B8;
    --accent-text: #34D399;
    --link: #93C5FD;
    --code-bg: #0F172A;
    --pass: #34D399;
    --fail: #FCA5A5;
    --pass-bg: #064E3B;
    --fail-bg: #5B1A1A;
    --warn-bg: #4A3410;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
img, svg { max-width: 100%; }
a { color: var(--link); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 6vw, 3.2rem); margin: 0.4em 0 0.3em; }
h2 { font-size: clamp(1.5rem, 4vw, 2.1rem); margin: 0 0 0.4em; }
h3 { font-size: 1.15rem; margin: 0 0 0.4em; }
p { margin: 0 0 1em; }
code, pre { font-family: var(--mono); font-size: 0.88em; }
:not(pre) > code {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.05em 0.35em;
  overflow-wrap: break-word;
}

:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: 8px;
  top: -60px;
  background: var(--navy);
  color: #FFFFFF;
  padding: 8px 14px;
  border-radius: 8px;
  z-index: 10;
}
.skip:focus { top: 8px; }

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }

/* Header and footer */

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 5;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 60px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
}
.brand svg, .brand img { width: 28px; height: 32px; }
.site-nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 0; padding: 0; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--text); text-decoration: underline; }

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 64px;
  padding: 32px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Sections */

section { padding: 56px 0; }
section.alt { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }
.kicker {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-text);
  margin-bottom: 6px;
}
.note { color: var(--muted); font-size: 0.93rem; }
.tag-illustration {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--amber);
  background: var(--warn-bg);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 10px;
}
@media (prefers-color-scheme: dark) { .tag-illustration { color: #FCD34D; } }

/* Hero */

.hero { padding: 56px 0 40px; }
.hero .logo-big { width: 76px; height: 86px; }
.hero h1 { max-width: 18ch; }
.install {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 8px 8px 14px;
  margin: 8px 0 20px;
  max-width: 100%;
}
.install code { background: none; border: 0; padding: 0; font-size: 1rem; }
.buttons { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid var(--navy);
  font-size: 1rem;
  cursor: pointer;
}
.btn.primary { background: var(--navy); color: #FFFFFF; }
.btn.secondary { background: transparent; color: var(--text); }
@media (prefers-color-scheme: dark) {
  /* The logo sits on a light tile, as the brand asks, so its navy half stays visible. */
  .brand svg, .brand img, .hero .logo-big { background: #F8FAFC; border-radius: 10px; padding: 3px; }
  .hero .logo-big { padding: 8px; border-radius: 16px; }
  .btn { border-color: #CBD5E1; }
  .btn.primary { background: #E2E8F0; color: #0B1120; }
}

/* Cards and grids */

.grid { display: grid; gap: 18px; }
/* Grid children may shrink below their widest line, so long commands scroll inside their box. */
.grid > *, .pipeline > li, .matrix-wrap > *, .tiles > *, .stats > *, .headline-stats > * { min-width: 0; }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid.wide { grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card svg.anim { width: 100%; height: auto; display: block; margin-bottom: 12px; }
.card p:last-child { margin-bottom: 0; }

/* Code blocks with a copy button */

.code {
  position: relative;
  margin: 10px 0 16px;
}
.code pre, pre.output {
  margin: 0;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  overflow-x: auto;
  line-height: 1.5;
}
.code pre { padding-right: 70px; white-space: pre-wrap; overflow-wrap: break-word; }
pre.output {
  background: transparent;
  border-style: dashed;
  color: var(--muted);
  margin: 0 0 16px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.output-label { font-size: 0.8rem; font-weight: 700; color: var(--muted); margin: 0 0 4px; }
.copy {
  position: absolute;
  top: 7px;
  right: 7px;
  font: 600 0.8rem/1 system-ui, sans-serif;
  padding: 7px 10px;
  border-radius: 7px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

/* How it works: the pipeline */

.pipeline {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  gap: 12px;
}
.pipeline li {
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 0.3s, opacity 0.3s;
}
/* Dimming only with JavaScript on: without it every step is shown in full. */
.js .pipeline li { opacity: 0.55; }
.js .pipeline li.lit { border-color: var(--green); opacity: 1; }
.pipeline .step-head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  background: none;
  border: 0;
  padding: 14px 16px;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
}
.step-num {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  background: var(--code-bg);
  border: 2px solid var(--line);
}
.js .pipeline li.lit .step-num { background: var(--green); border-color: var(--green); color: #052E1F; }
.step-icon { flex: none; width: 34px; height: 34px; }
.step-title { font-weight: 700; }
.step-body { padding: 0 16px 14px 64px; }
.pipeline-controls { display: flex; gap: 10px; margin-top: 16px; align-items: center; flex-wrap: wrap; }

/* The interactive confusion matrix */

.matrix-wrap { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); align-items: start; }
.controls label { display: block; font-weight: 600; margin: 14px 0 4px; }
.controls input[type="range"] { width: 100%; accent-color: var(--accent-text); }
.controls output { font-family: var(--mono); }
.presets { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.presets button {
  font: 600 0.9rem/1 system-ui, sans-serif;
  padding: 9px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
.presets button[aria-pressed="true"] { border-color: var(--accent-text); box-shadow: inset 0 0 0 1px var(--accent-text); }
table.cm { border-collapse: collapse; width: 100%; text-align: center; font-size: 0.95rem; }
table.cm th, table.cm td { border: 1px solid var(--line); padding: 10px 6px; }
table.cm td { font-size: 1.4rem; font-weight: 700; font-family: var(--mono); }
table.cm td.good { background: var(--pass-bg); color: var(--pass); }
table.cm td.bad { background: var(--fail-bg); color: var(--fail); }
table.cm td small { display: block; font: 500 0.75rem/1.3 system-ui, sans-serif; color: var(--muted); }
.stats { display: grid; gap: 10px; margin-top: 16px; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.stat { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; background: var(--surface); }
.stat .label { font-size: 0.8rem; color: var(--muted); font-weight: 600; }
.stat .value { font-size: 1.5rem; font-weight: 700; font-family: var(--mono); }
.stat .why { font-size: 0.85rem; color: var(--muted); margin: 2px 0 0; }
.stat.muted .value { color: var(--muted); }
.verdict-line { margin-top: 14px; padding: 10px 14px; border-radius: 10px; font-weight: 600; }
.verdict-line.good { background: var(--pass-bg); color: var(--pass); }
.verdict-line.care { background: var(--warn-bg); }
.verdict-line.bad { background: var(--fail-bg); color: var(--fail); }

/* Noise and position bias */

.runs { display: grid; gap: 6px; grid-template-columns: auto repeat(5, minmax(0, 1fr)); align-items: center; font-size: 0.9rem; }
.runs .hdr { color: var(--muted); font-weight: 600; text-align: center; }
.runs .chip {
  text-align: center;
  border-radius: 8px;
  padding: 6px 0;
  font-weight: 700;
  font-size: 0.8rem;
}
.chip.p { background: var(--pass-bg); color: var(--pass); }
.chip.f { background: var(--fail-bg); color: var(--fail); }
.chip.flip { outline: 3px solid var(--amber); outline-offset: 1px; animation: pulse 2.4s ease-in-out infinite; }
@media (prefers-color-scheme: dark) { .chip.flip { outline-color: #FCD34D; } }

/* Panels: gate, migrate, attribute */

.toggle-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.toggle-row .btn { padding: 8px 14px; }
.toggle-row [aria-pressed="true"] { background: var(--navy); color: #FFFFFF; }
@media (prefers-color-scheme: dark) { .toggle-row [aria-pressed="true"] { background: #E2E8F0; color: #0B1120; } }
.status {
  display: inline-block;
  font: 700 0.85rem/1 var(--mono);
  padding: 6px 10px;
  border-radius: 6px;
}
.status.ok { background: var(--pass-bg); color: var(--pass); }
.status.no { background: var(--fail-bg); color: var(--fail); }
.status.mid { background: var(--warn-bg); }
.ci-check {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 0.9rem;
}
.ci-dot { width: 14px; height: 14px; border-radius: 50%; flex: none; transition: background 0.3s; }
.ci-dot.ok { background: var(--green); }
.ci-dot.no { background: var(--red); }
table.plain { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
table.plain th, table.plain td { border-bottom: 1px solid var(--line); padding: 7px 6px; text-align: left; vertical-align: top; }
table.plain th { color: var(--muted); font-weight: 600; }

/* Works with: integration tiles */

.tiles { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.tiles details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0;
}
.tiles details[open] { grid-column: 1 / -1; }
.tiles summary {
  cursor: pointer;
  padding: 14px 16px;
  font-weight: 700;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.tiles summary::-webkit-details-marker { display: none; }
.tiles summary::after { content: "+"; color: var(--muted); font-weight: 400; }
.tiles details[open] summary::after { content: "−"; }
.tiles summary small { display: block; font-weight: 400; color: var(--muted); font-size: 0.85rem; }
.tiles .recipe { padding: 0 16px 14px; }

/* The real result: bars */

.bars { display: grid; gap: 10px; margin: 12px 0; }
.bar-row { display: grid; grid-template-columns: minmax(110px, 190px) 1fr 3.5em; gap: 10px; align-items: center; font-size: 0.93rem; }
.bar-track { display: none; }
.js .bar-track { display: block; background: var(--code-bg); border: 1px solid var(--line); border-radius: 999px; height: 16px; overflow: hidden; }
.bar-fill { height: 100%; width: 0; background: var(--green); border-radius: 999px; transition: width 0.9s ease; }
.bar-fill.weak { background: var(--amber); }
.bar-row .num { font-family: var(--mono); font-weight: 700; text-align: right; }
.headline-stats { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); margin: 16px 0; }

/* Tabs */

.tabs [role="tablist"] { display: flex; flex-wrap: wrap; gap: 6px; border-bottom: 1px solid var(--line); }
.tabs [role="tab"] {
  font: 600 0.95rem/1 system-ui, sans-serif;
  padding: 10px 14px;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
}
.tabs [role="tab"][aria-selected="true"] { color: var(--text); border-color: var(--line); background: var(--surface); margin-bottom: -1px; }
.tabs [role="tabpanel"] { padding-top: 12px; }

/* FAQ */

.faq details { border-bottom: 1px solid var(--line); padding: 4px 0; }
.faq summary { cursor: pointer; font-weight: 700; padding: 10px 0; }
.faq details p { color: var(--muted); }

/* Keys diagram */

.diagram { width: 100%; height: auto; max-width: 720px; display: block; margin: 8px auto 16px; }
.diagram text { font: 600 14px system-ui, sans-serif; fill: var(--text); }
.diagram .small { font-weight: 400; font-size: 12px; fill: var(--muted); }
.diagram .box { fill: var(--surface); stroke: var(--line); stroke-width: 2; }
.diagram .wire { stroke: var(--green); stroke-width: 3; fill: none; stroke-dasharray: 8 8; animation: flow 1.6s linear infinite; }
.diagram .cross { stroke: var(--red); stroke-width: 4; stroke-linecap: round; }

/* Steps on the setup and tutorial pages */

.steps { counter-reset: step; list-style: none; padding: 0; }
.steps > li { counter-increment: step; position: relative; padding-left: 48px; margin: 0 0 28px; }
.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  background: var(--navy);
  color: #FFFFFF;
}
@media (prefers-color-scheme: dark) { .steps > li::before { background: #E2E8F0; color: #0B1120; } }
.callout { border-left: 4px solid var(--green); background: var(--bg-soft); padding: 12px 16px; border-radius: 0 10px 10px 0; margin: 16px 0; }
.callout.warn { border-left-color: var(--red); }
.toc { columns: 2 220px; padding-left: 20px; }

/* Reference page (rendered from docs/reference.md) */

.doc table { border-collapse: collapse; display: block; overflow-x: auto; margin: 0 0 1em; font-size: 0.93rem; }
.doc th, .doc td { border: 1px solid var(--line); padding: 6px 9px; text-align: left; vertical-align: top; }
.doc pre { background: var(--code-bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; overflow-x: auto; }
.doc h2 { margin-top: 1.6em; padding-top: 0.4em; border-top: 1px solid var(--line); }

/* Animations. Each one loops a small story; its resting frame tells the same story. */

@keyframes pulse { 0%, 100% { outline-offset: 1px; } 50% { outline-offset: 4px; } }
@keyframes flow { to { stroke-dashoffset: -16; } }
@keyframes stamp-in { 0%, 30% { opacity: 0; transform: scale(1.4); } 45%, 100% { opacity: 1; transform: scale(1); } }
@keyframes flip-verdict { 0%, 55% { fill: var(--pass); } 65%, 100% { fill: var(--fail); } }
@keyframes flip-text-pass { 0%, 55% { opacity: 1; } 65%, 100% { opacity: 0; } }
@keyframes flip-text-fail { 0%, 55% { opacity: 0; } 65%, 100% { opacity: 1; } }
@keyframes drift { 0%, 40% { transform: translateY(0); } 60%, 100% { transform: translateY(var(--shift, 14px)); } }
@keyframes update-flash { 0%, 35% { opacity: 0; } 45%, 100% { opacity: 1; } }

.anim .stamp { transform-box: fill-box; transform-origin: center; animation: stamp-in 4s ease-out infinite; }
.anim .flip-fill { animation: flip-verdict 4s ease-in-out infinite; }
.anim .flip-pass { animation: flip-text-pass 4s ease-in-out infinite; }
.anim .flip-fail { animation: flip-text-fail 4s ease-in-out infinite; }
.anim .drift { transform-box: fill-box; animation: drift 4s ease-in-out infinite; }
.anim .update { animation: update-flash 4s ease-in-out infinite; }
.anim text { font: 600 11px system-ui, sans-serif; fill: var(--text); }
.anim .muted-text { fill: var(--muted); font-weight: 400; }
.anim .frame { fill: var(--bg-soft); stroke: var(--line); stroke-width: 1.5; }
.anim .pass-fill { fill: var(--pass); }
.anim .fail-fill { fill: var(--fail); }
.anim .chip-text { fill: #FFFFFF; font-weight: 700; }
@media (prefers-color-scheme: dark) { .anim .chip-text { fill: #0B1120; } }

/* Reduced motion: no animation, no smooth scrolling; every picture shows its final frame. */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .anim .flip-fill { fill: var(--fail); }
  .anim .flip-pass { opacity: 0; }
  .anim .flip-fail, .anim .stamp, .anim .update { opacity: 1; }
  .anim .drift { transform: translateY(var(--shift, 14px)); }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  section { padding: 40px 0; }
  .step-body { padding-left: 16px; }
  .bar-row { grid-template-columns: 1fr 3.2em; }
  .bar-row .bar-label { grid-column: 1 / -1; }
  .runs { font-size: 0.8rem; }
}