/* ---------------------------------------------------------------------------
   Palette. Light is the base; dark overrides only the tokens, so nothing has
   its sole definition inside a media query.
   --------------------------------------------------------------------------- */
:root {
  --bg:        #f7f8fa;
  --surface:   #ffffff;
  --surface-2: #f0f2f5;
  --ink:       #14171c;
  --body:      #3c434d;
  --muted:     #6b747f;
  --rule:      #dde2e8;
  --accent:    #14507f;
  --accent-2:  #1d6fae;
  --good:      #1a7f52;
  --warn:      #a8620d;
  --bad:       #b03636;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #0e1116;
    --surface:   #161b22;
    --surface-2: #1c232c;
    --ink:       #e9edf2;
    --body:      #b6bec8;
    --muted:     #838d99;
    --rule:      #2a323c;
    --accent:    #6fb2e8;
    --accent-2:  #8cc4f0;
    --good:      #4ec98a;
    --warn:      #e0a44d;
    --bad:       #f07070;
  }
}

* { box-sizing: border-box; }

/* The hidden attribute has to beat component display rules below. */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

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

code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--surface-2);
  padding: .1em .4em;
  border-radius: 4px;
}

/* ---------- masthead ---------- */
.masthead {
  background: var(--surface);
  border-bottom: 1px solid var(--rule);
  padding: 44px 0 32px;
}

.masthead h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--ink);
}

.tagline {
  margin: 6px 0 0;
  font-size: clamp(15px, 2.2vw, 18px);
  color: var(--accent);
  font-weight: 600;
}

.contact {
  margin: 14px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- intro ---------- */
main { padding: 32px 0 64px; }

.intro { max-width: 74ch; }
.intro p { margin: 0 0 14px; }
.intro .note {
  font-size: 15px;
  color: var(--muted);
  border-left: 3px solid var(--rule);
  padding-left: 14px;
}

/* ---------- boot ---------- */
.boot {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 32px 0;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 10px;
  color: var(--muted);
  font-size: 15px;
}

.spinner {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  border: 2px solid var(--rule);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  .spinner { animation-duration: 3s; }
  html { scroll-behavior: auto; }
}

.boot.failed .spinner { display: none; }
.boot.failed { color: var(--bad); border-color: var(--bad); }

/* ---------- demo blocks ---------- */
.demo {
  margin: 40px 0;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 12px;
}

.demo-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.demo h2, .projects h2 {
  margin: 0;
  font-size: 21px;
  color: var(--ink);
  letter-spacing: -0.2px;
}

.repo-link {
  font-family: var(--mono);
  font-size: 13px;
  white-space: nowrap;
}

.lede {
  margin: 10px 0 20px;
  max-width: 78ch;
  font-size: 15px;
}

/* ---------- controls ---------- */
.controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

input[type="text"], textarea {
  flex: 1 1 320px;
  min-width: 0;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 10px 12px;
}

textarea {
  width: 100%;
  resize: vertical;
  line-height: 1.5;
  font-size: 14px;
}

input:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

button {
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid var(--rule);
  background: var(--surface-2);
  color: var(--body);
  padding: 10px 18px;
}

button:hover { border-color: var(--accent); color: var(--accent); }

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
button.primary:hover { background: var(--accent-2); border-color: var(--accent-2); color: #fff; }

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
}

.presets button {
  font-size: 13px;
  padding: 5px 12px;
  border-radius: 20px;
}

/* ---------- retrieval columns ---------- */
.cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr));
  gap: 16px;
  margin-top: 22px;
}

.col {
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 14px;
}

.col.winner { border-color: var(--accent); }

.col h3 {
  margin: 0 0 4px;
  font-size: 14px;
  color: var(--ink);
  letter-spacing: .3px;
}

.col .sub {
  margin: 0 0 12px;
  font-size: 12px;
  color: var(--muted);
}

.hit {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 0;
  border-top: 1px solid var(--rule);
  font-size: 13px;
}
.hit:first-of-type { border-top: none; }

.hit .rank {
  flex: 0 0 18px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
}

.hit .doc {
  font-family: var(--mono);
  color: var(--ink);
  font-size: 12.5px;
}

.hit .score {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
}

.hit.both .doc { color: var(--good); font-weight: 600; }

.badge {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .5px;
  padding: 1px 6px;
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--muted);
}
.badge.both { background: var(--good); color: #fff; }

.empty { font-size: 13px; color: var(--muted); font-style: italic; padding: 8px 0; }

/* ---------- explain ---------- */
.explain {
  margin-top: 18px;
  border-top: 1px solid var(--rule);
  padding-top: 14px;
}

.explain summary {
  cursor: pointer;
  font-size: 14px;
  color: var(--accent);
  font-weight: 600;
}

.explain table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 13px;
}

.explain th, .explain td {
  text-align: left;
  padding: 6px 10px 6px 0;
  border-bottom: 1px solid var(--rule);
}

.explain th { color: var(--muted); font-weight: 600; font-size: 12px; }
.explain td.num { font-family: var(--mono); font-size: 12px; }

.table-scroll { overflow-x: auto; }

.caveat {
  margin: 16px 0 0;
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------- eval ---------- */
.eval-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 24px;
  margin-top: 18px;
}

@media (max-width: 760px) {
  .eval-grid { grid-template-columns: 1fr; }
}

.eval-inputs label {
  display: block;
  margin: 14px 0 5px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}
.eval-inputs label:first-child { margin-top: 0; }

.hint { font-weight: 400; color: var(--muted); font-size: 12px; }

.metric { margin-bottom: 16px; }

.metric-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 13px;
}

.metric-name { color: var(--ink); font-weight: 600; }
.metric-val { font-family: var(--mono); font-size: 13px; }

.bar {
  height: 7px;
  margin-top: 5px;
  border-radius: 4px;
  background: var(--surface-2);
  overflow: hidden;
}

.bar span {
  display: block;
  height: 100%;
  border-radius: 4px;
  transition: width .25s ease;
}

.metric .why { margin: 4px 0 0; font-size: 12px; color: var(--muted); }

.claim {
  display: flex;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 13px;
}

.claim .verdict {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 10px;
  height: fit-content;
}
.claim .verdict.ok  { background: var(--good); color: #fff; }
.claim .verdict.bad { background: var(--bad);  color: #fff; }

/* ---------- projects ---------- */
.projects { margin-top: 56px; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(440px, 100%), 1fr));
  gap: 16px;
  margin-top: 18px;
}

.card {
  display: block;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 12px;
  color: var(--body);
  text-decoration: none;
  transition: border-color .15s ease, transform .15s ease;
}

.card:hover {
  border-color: var(--accent);
  text-decoration: none;
  transform: translateY(-2px);
}

@media (prefers-reduced-motion: reduce) {
  .card:hover { transform: none; }
  .bar span { transition: none; }
}

.card h3 {
  margin: 0;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--accent);
}

.card .stack {
  margin: 4px 0 10px;
  font-size: 12px;
  color: var(--muted);
}

.card p { margin: 0 0 10px; font-size: 14px; }

.card .meta {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
  font-family: var(--mono);
}

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--rule);
  padding: 24px 0 48px;
  font-size: 13px;
  color: var(--muted);
}
footer p { margin: 0; }