:root {
  color-scheme: light;
  --surface: #fcfcfb;
  --plane: #f9f9f7;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #74726c;
  --line: #e1e0d9;
  --fill: #f0efec;
  --accent: #0b0b0b;
  --accent-ink: #ffffff;
  --dense: #2a78d6;
  --sparse: #eb6834;
  --hybrid: #1baf7a;
  --warn-bg: #fff6e0;
  --warn-line: #e0b84a;
  --err-bg: #fdecec;
  --err-line: #d03b3b;
  --focus: #2a78d6;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --surface: #1a1a19;
    --plane: #0d0d0d;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #a3a197;
    --line: #2c2c2a;
    --fill: #262624;
    --accent: #ffffff;
    --accent-ink: #0b0b0b;
    --dense: #3987e5;
    --sparse: #d95926;
    --hybrid: #199e70;
    --warn-bg: #2b2412;
    --warn-line: #8a6d1c;
    --err-bg: #2d1717;
    --err-line: #e66767;
    --focus: #6da7ec;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--plane);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.55;
}

header.page, main, footer.page {
  max-width: 62rem;
  margin: 0 auto;
  padding: 0 1rem;
}

header.page { padding-top: 2rem; }
footer.page { padding-top: 1rem; padding-bottom: 3rem; }

h1 { margin: 0 0 0.25rem; font-size: 1.9rem; letter-spacing: -0.01em; }
h2 { margin: 0 0 0.5rem; font-size: 1.35rem; }
.tagline { margin: 0 0 1rem; color: var(--ink-2); font-size: 1.05rem; }
.lead { color: var(--ink-2); margin-top: 0; }
.small { font-size: 0.85rem; }
.muted { color: var(--muted); }

nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; margin-bottom: 1.25rem; }
a { color: var(--ink); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

section {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

label { display: block; font-weight: 600; margin-bottom: 0.3rem; }
label.inline { display: inline-block; margin: 0 0.5rem 0 0; }

textarea, select {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--ink-2);
  border-radius: 8px;
  padding: 0.6rem 0.7rem;
}
select { width: auto; }
textarea { resize: vertical; }

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

.row { display: flex; gap: 0.75rem; align-items: center; margin-top: 0.5rem; }
.row.wrap { flex-wrap: wrap; }
.row.between { justify-content: space-between; margin-top: 0.2rem; }
.actions { margin-top: 1rem; }

button {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.55rem 1rem;
}
button.secondary { background: transparent; color: var(--ink); }
button.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.chip {
  font-weight: 500;
  font-size: 0.85rem;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  background: var(--fill);
  color: var(--ink);
  border-color: var(--line);
}

.examples { margin-top: 0.9rem; display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }

.notice {
  margin: 1rem 0;
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  background: var(--fill);
  border: 1px solid var(--line);
  font-size: 0.92rem;
}
.notice.warn { background: var(--warn-bg); border-color: var(--warn-line); }
.notice.error { background: var(--err-bg); border-color: var(--err-line); }

#output { display: grid; gap: 1rem; }
#output.compare { grid-template-columns: repeat(auto-fit, minmax(min(17rem, 100%), 1fr)); }

.card {
  border: 1px solid var(--line);
  border-top: 4px solid var(--muted);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  background: var(--surface);
}
.card[data-mode="dense"] { border-top-color: var(--dense); }
.card[data-mode="sparse"] { border-top-color: var(--sparse); }
.card[data-mode="hybrid"] { border-top-color: var(--hybrid); }
.card h3 { margin: 0 0 0.4rem; font-size: 1rem; display: flex; justify-content: space-between; gap: 1rem; }
.card .meta { font-weight: 400; color: var(--muted); font-size: 0.85rem; }
.card .answer { white-space: pre-wrap; overflow-wrap: anywhere; margin: 0.4rem 0; }
.card h4 { margin: 0.8rem 0 0.25rem; font-size: 0.85rem; color: var(--ink-2); text-transform: uppercase; letter-spacing: 0.04em; }
.card ul { margin: 0; padding-left: 1.1rem; }
.card li { margin: 0.25rem 0; overflow-wrap: anywhere; }
.card code { font-size: 0.8rem; background: var(--fill); padding: 0.05rem 0.3rem; border-radius: 4px; }

.passage { border-top: 1px solid var(--line); padding: 0.55rem 0; }
.passage:first-of-type { border-top: 0; }
.passage .src { font-weight: 600; font-size: 0.9rem; }
.passage p { margin: 0.25rem 0 0; font-size: 0.92rem; white-space: pre-wrap; overflow-wrap: anywhere; }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
th, td { padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--line); text-align: center; }
th { background: var(--fill); color: var(--ink-2); font-weight: 600; }
th:first-child, td:first-child { text-align: left; font-weight: 600; }
td.best { font-weight: 700; }

.figures { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(20rem, 100%), 1fr)); gap: 1rem; margin: 1rem 0; }
figure { margin: 0; }
figure img { width: 100%; height: auto; border: 1px solid var(--line); border-radius: 8px; background: #fcfcfb; }
figcaption { font-size: 0.85rem; color: var(--muted); margin-top: 0.3rem; }

@media (max-width: 34rem) {
  h1 { font-size: 1.5rem; }
  section { padding: 1rem; }
  button { width: 100%; }
  .row.wrap.actions { flex-direction: column; align-items: stretch; }
}

/* ---- benchmark explorer ---- */
.controls { display: flex; flex-wrap: wrap; gap: 0.75rem 1rem; align-items: flex-end; margin: 1rem 0; }
.controls .grow { flex: 1 1 18rem; min-width: 0; }
.controls select { width: 100%; }
.controls .stepper { display: flex; align-items: center; gap: 0.6rem; }

header.page .notice { margin-top: 0; }

.qbox { border: 1px solid var(--line); border-radius: 10px; padding: 0.9rem 1rem; background: var(--surface); margin-bottom: 1rem; }
.qbox .tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.5rem; }
.tag { font-size: 0.78rem; padding: 0.1rem 0.55rem; border-radius: 999px; background: var(--fill); border: 1px solid var(--line); color: var(--ink-2); }
.qbox .question { font-size: 1.05rem; margin: 0.25rem 0 0.6rem; overflow-wrap: anywhere; }
.qbox .reference { margin: 0; font-size: 0.92rem; color: var(--ink-2); }

.modes { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(16.5rem, 100%), 1fr)); gap: 1rem; }
.status { font-weight: 700; font-size: 0.9rem; margin: 0.1rem 0 0.3rem; }
.status.good::before { content: "\2713  "; }
.status.bad::before { content: "\2717  "; }
.status.neutral::before { content: "\2022  "; }
.status.good { color: var(--hybrid); }
.status.bad { color: var(--err-line); }
.evidence { margin: 0.1rem 0 0.4rem; font-size: 0.9rem; }
.scores { margin: 0.3rem 0 0.5rem; font-size: 0.8rem; color: var(--muted); }
.refusal { font-style: italic; color: var(--ink-2); }

details { margin-top: 0.8rem; border-top: 1px solid var(--line); padding-top: 0.5rem; }
summary { cursor: pointer; font-weight: 600; font-size: 0.9rem; }
.passage.needed { background: var(--fill); border-left: 3px solid var(--hybrid); padding-left: 0.6rem; border-radius: 4px; }
.badge { font-size: 0.72rem; font-weight: 700; padding: 0.05rem 0.45rem; border-radius: 999px; border: 1px solid var(--hybrid); color: var(--hybrid); margin-left: 0.4rem; white-space: nowrap; }

pre { overflow-x: auto; background: var(--fill); border: 1px solid var(--line); border-radius: 8px; padding: 0.8rem 1rem; }
pre code { background: none; padding: 0; }
code { font-size: 0.9em; background: var(--fill); padding: 0.05rem 0.3rem; border-radius: 4px; }

@media (max-width: 34rem) {
  .controls .stepper { width: 100%; justify-content: space-between; }
  .controls .stepper button { width: auto; }
}

button.chip { white-space: normal; text-align: left; }