/*
 * app.css — one stylesheet, no build step, no external fonts.
 *
 * Colours are defined once on :root as the light palette, then overridden in
 * two places: the system-dark media query (guarded so an explicit light choice
 * wins) and the explicit dark attribute. Nothing gets its only definition
 * inside a media query.
 */

:root {
  color-scheme: light;

  --bg:            #fbfbfa;
  --bg-panel:      #ffffff;
  --bg-sunken:     #f2f2f0;
  --border:        #e2e2dd;
  --border-strong: #c9c9c2;

  /* Every foreground/background pair used by the layout clears WCAG AA (4.5:1).
     Verified by tools/check-a11y.mjs, which fails CI if a change breaks it. */
  --text:          #1b1b19;
  --text-muted:    #63635c;
  --text-faint:    #6f6f68;

  --accent:        #a94a17;
  --accent-soft:   #fbeee6;
  --on-accent:     #ffffff;
  --baseline:      #256456;
  --baseline-soft: #eef7f4;
  --warn:          #7a5600;

  --radius:   10px;
  --radius-s: 6px;
  --wrap:     1080px;

  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR",
          "Malgun Gothic", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;

    --bg:            #131315;
    --bg-panel:      #1b1b1e;
    --bg-sunken:     #232327;
    --border:        #33333a;
    --border-strong: #4a4a53;

    --text:          #ececeb;
    --text-muted:    #adada7;
    --text-faint:    #9a9a94;

    --accent:        #f0925c;
    --accent-soft:   #3a2418;
    --on-accent:     #17130f;
    --baseline:      #6fc7ae;
    --baseline-soft: #17322b;
    --warn:          #e0b354;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --bg:            #131315;
  --bg-panel:      #1b1b1e;
  --bg-sunken:     #232327;
  --border:        #33333a;
  --border-strong: #4a4a53;

  --text:          #ececeb;
  --text-muted:    #adada7;
  --text-faint:    #9a9a94;

  --accent:        #f0925c;
  --accent-soft:   #3a2418;
  --on-accent:     #17130f;
  --baseline:      #6fc7ae;
  --baseline-soft: #17322b;
  --warn:          #e0b354;
}

/* ───────────────────────────────────────────────────────────────── base */

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;

  /* Browsers break Korean between any two syllables by default, which chops
     words in half mid-sentence. keep-all restores word-level wrapping; the
     overflow-wrap fallback keeps a long unbreakable run from escaping its box. */
  word-break: keep-all;
  overflow-wrap: break-word;
}

h1, h2, h3 { line-height: 1.25; margin: 0; font-weight: 650; }
p { margin: 0; }
a { color: var(--accent); text-underline-offset: 2px; }

.wrap {
  max-inline-size: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 32px);
}

.sr-only {
  position: absolute; inline-size: 1px; block-size: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap;
}

.skip-link {
  position: absolute; inset-block-start: -60px; inset-inline-start: 12px;
  z-index: 10; padding: 10px 16px;
  background: var(--bg-panel); border: 1px solid var(--border-strong);
  border-radius: var(--radius-s);
  transition: inset-block-start .15s;
}
.skip-link:focus { inset-block-start: 12px; }

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

/* ─────────────────────────────────────────────────────────────── header */

.site-header {
  border-block-end: 1px solid var(--border);
  background: var(--bg-panel);
  padding-block: 20px;
}
.header-inner {
  display: flex; flex-wrap: wrap; gap: 16px;
  align-items: flex-start; justify-content: space-between;
}
.brand h1 {
  font-size: 1.45rem; letter-spacing: -0.02em;
  font-family: var(--mono);
}
.tagline {
  margin-block-start: 4px;
  color: var(--text-muted);
  font-size: .92rem;
  max-inline-size: 62ch;
}
.brand { flex: 1 1 22rem; }
.header-actions { display: flex; gap: 8px; align-items: center; }

.seg {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-s);
  overflow: hidden;
}
.seg-btn {
  appearance: none; border: 0; cursor: pointer;
  background: var(--bg-panel); color: var(--text-muted);
  padding: 6px 12px; font: inherit; font-size: .85rem;
}
.seg-btn[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.icon-btn {
  appearance: none; cursor: pointer;
  background: var(--bg-panel); color: var(--text-muted);
  border: 1px solid var(--border-strong); border-radius: var(--radius-s);
  inline-size: 34px; block-size: 34px; font-size: 1rem; line-height: 1;
}
.icon-btn.small { inline-size: 26px; block-size: 26px; font-size: .9rem; }

/* ───────────────────────────────────────────────────────────── sections */

main { padding-block: 24px 48px; display: grid; gap: 24px; }

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(16px, 3vw, 24px);
}

.section-h {
  font-size: .78rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--text-faint); margin-block-end: 12px;
}

.notice {
  border: 1px solid var(--warn); border-radius: var(--radius);
  padding: 14px; margin-block: 16px; font-size: .9rem;
}

/* ─────────────────────────────────────────────────────────── controls */

.control-grid {
  display: grid; gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.field { display: grid; gap: 6px; align-content: start; }
.field > label, .lanes-config legend {
  font-size: .82rem; font-weight: 600; color: var(--text-muted);
}
.hint { font-size: .78rem; color: var(--text-faint); line-height: 1.5; }

select, input[type="number"], textarea {
  font: inherit; color: var(--text);
  background: var(--bg-sunken);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-s);
  padding: 7px 9px;
  inline-size: 100%;
}
textarea { resize: vertical; font-size: .9rem; line-height: 1.6; }

.slider-row { display: flex; gap: 10px; align-items: center; }
.slider-row input[type="range"] { flex: 1; min-inline-size: 0; accent-color: var(--accent); }
.numout {
  font-family: var(--mono); font-size: .82rem;
  min-inline-size: 8ch; text-align: end; color: var(--text-muted);
}

.linklike {
  appearance: none; background: none; border: 0; padding: 0;
  font: inherit; font-size: .78rem;
  color: var(--accent); cursor: pointer; text-decoration: underline;
}

.lanes-config {
  margin-block-start: 20px; padding: 14px;
  border: 1px solid var(--border); border-radius: var(--radius-s);
}
.speed-inputs { display: flex; flex-wrap: wrap; gap: 10px; margin-block: 10px; }
.speed-row { display: flex; align-items: center; gap: 6px; }
.speed-row input { inline-size: 5.5rem; }
.speed-row .unit { font-size: .78rem; color: var(--text-faint); }

.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-block-start: 18px; }
.primary-btn, .ghost-btn {
  appearance: none; cursor: pointer; font: inherit; font-size: .9rem;
  border-radius: var(--radius-s); padding: 8px 16px;
  border: 1px solid var(--border-strong);
  background: var(--bg-sunken); color: var(--text);
}
/* The text colour on an accent fill has to flip with the theme. Doing it with a
   :not([data-theme="light"]) selector looked right and was wrong: "auto" is also
   not "light", so light-mode visitors got dark-on-orange. It is a token now. */
.primary-btn { background: var(--accent); border-color: var(--accent); color: var(--on-accent); font-weight: 600; }
.primary-btn:disabled, .ghost-btn:disabled { opacity: .45; cursor: not-allowed; }
.share-feedback { font-size: .8rem; color: var(--text-muted); }

/* ──────────────────────────────────────────────────────────────── lanes */

.lane-list { display: grid; gap: 12px; }

.lane {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px 12px;
}
.lane--baseline {
  border-color: var(--baseline);
  background: var(--baseline-soft);
}

.lane-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.lane-title { font-size: .95rem; font-family: var(--mono); }
.lane--baseline .lane-title { color: var(--baseline); }
.lane-meta { font-size: .75rem; color: var(--text-faint); font-family: var(--mono); white-space: nowrap; }

.lane-text {
  margin-block: 8px;
  /* Fixed height, not auto: lanes must not resize while racing, or the whole
     page jitters as the fastest one outgrows the others. */
  min-block-size: 4.8em;
  max-block-size: 4.8em;
  overflow: hidden;
  font-size: .88rem; line-height: 1.6;
  white-space: pre-wrap; word-break: break-word;
  /* Keep the newest text in view as it grows past the box. */
  display: flex; flex-direction: column; justify-content: flex-end;
}
.lane-text.is-waiting::after {
  content: "▍";
  color: var(--text-faint);
  animation: blink 1s steps(2, start) infinite;
}
@keyframes blink { to { visibility: hidden; } }

.lane-bar { block-size: 4px; background: var(--bg-sunken); border-radius: 2px; overflow: hidden; }
.lane-bar-fill { block-size: 100%; inline-size: 0; background: var(--accent); }
.lane--baseline .lane-bar-fill { background: var(--baseline); }

.reduced-motion-note {
  font-size: .8rem; color: var(--text-muted);
  background: var(--bg-sunken); border-radius: var(--radius-s);
  padding: 8px 12px; margin-block-end: 12px;
}

/* Reduced-motion timeline table */
.timeline {
  inline-size: 100%; border-collapse: collapse; font-size: .8rem;
  display: block; overflow-x: auto;
}
.timeline:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.timeline th, .timeline td {
  border: 1px solid var(--border); padding: 8px 10px;
  text-align: start; vertical-align: top; min-inline-size: 9rem;
}
.timeline thead th { color: var(--text-faint); font-weight: 600; white-space: nowrap; }
.timeline tbody th { font-family: var(--mono); white-space: nowrap; }
.timeline .row--baseline { background: var(--baseline-soft); }
.cell-pct { display: block; font-family: var(--mono); color: var(--text-muted); }
.cell-text { display: block; color: var(--text-faint); font-size: .72rem; margin-block-start: 2px; }

/* ────────────────────────────────────────────────────────────── verdict */

.verdict { display: grid; gap: 12px; }
.verdict-intro { font-size: .9rem; color: var(--text-muted); }
.verdict-row {
  border-inline-start: 3px solid var(--border-strong);
  padding-inline-start: 12px;
}
.verdict-row.is-ok { border-inline-start-color: var(--baseline); }
.verdict-row.is-slow { border-inline-start-color: var(--warn); }
.verdict-line { font-size: .95rem; }
.verdict-sub { font-size: .8rem; color: var(--text-muted); }
.verdict-ttft { color: var(--accent); }

/* ───────────────────────────────────────────────────────────── evidence */

.evidence { font-size: .85rem; }
.evidence-line { margin-block-end: 8px; color: var(--text-muted); }
.evidence-line strong { color: var(--text); }
.evidence-line.muted { color: var(--text-faint); }
.fidelity--approximate { color: var(--warn); }
.caveats { margin-block-start: 12px; font-size: .82rem; color: var(--text-muted); }
.caveats summary { cursor: pointer; color: var(--text); font-weight: 600; }
.caveats ul { margin-block: 8px 0; padding-inline-start: 1.2em; display: grid; gap: 6px; }

.site-footer {
  padding-block: 24px 40px;
  border-block-start: 1px solid var(--border);
  font-size: .78rem; color: var(--text-faint);
}

/* ──────────────────────────────────────────────────────────────── dialog */

.dialog {
  border: 1px solid var(--border-strong); border-radius: var(--radius);
  background: var(--bg-panel); color: var(--text);
  padding: 0; max-inline-size: min(640px, 92vw);
}
.dialog::backdrop { background: rgb(0 0 0 / .5); }
.dialog-inner { padding: clamp(16px, 4vw, 28px); display: grid; gap: 12px; }
.rt-passage {
  background: var(--bg-sunken); border-radius: var(--radius-s);
  padding: 14px; font-size: .92rem; line-height: 1.75;
  max-block-size: 46vh; overflow-y: auto;
  filter: blur(5px); user-select: none;
}
.rt-passage.is-revealed { filter: none; user-select: auto; }
.dialog-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.rt-result { font-size: .88rem; color: var(--accent); min-block-size: 1.4em; }

/* ───────────────────────────────────────────────── reduced motion */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}