/* voice-latency-budget — instrument-panel aesthetic, theme-aware. */
:root {
  color-scheme: light dark;
  --bg: oklch(20% 0.02 250);
  --bg-grid: oklch(24% 0.02 250);
  --panel: oklch(24% 0.025 255);
  --panel-2: oklch(27% 0.03 255);
  --line: oklch(34% 0.03 255);
  --line-soft: oklch(30% 0.025 255);
  --ink: oklch(96% 0.01 250);
  --ink-2: oklch(78% 0.02 250);
  --ink-3: oklch(62% 0.02 250);
  --signal: oklch(78% 0.14 195);
  --signal-dim: oklch(60% 0.10 195);

  /* perceptual band hues (zones + verdict) */
  --c-instant: oklch(72% 0.15 165);
  --c-snappy:  oklch(76% 0.13 200);
  --c-ok:      oklch(80% 0.13 90);
  --c-lag:     oklch(72% 0.16 55);
  --c-over:    oklch(64% 0.20 25);

  /* stage segment hues */
  --s-endpoint: oklch(66% 0.11 285);
  --s-network:  oklch(70% 0.12 230);
  --s-asr:      oklch(74% 0.13 195);
  --s-llm_ttft: oklch(76% 0.14 160);
  --s-llm_sentence: oklch(80% 0.13 120);
  --s-tts:      oklch(80% 0.13 80);
  --s-playout:  oklch(72% 0.10 300);

  --radius: 12px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "Pretendard", "Apple SD Gothic Neo", sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}
:root[data-theme="light"], :root:not([data-theme="dark"]) {
  /* light is the alt; dark stays default via the values above unless toggled */
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: oklch(97% 0.006 250); --bg-grid: oklch(94% 0.008 250);
    --panel: oklch(99% 0.004 250); --panel-2: oklch(96% 0.008 250);
    --line: oklch(88% 0.01 250); --line-soft: oklch(92% 0.008 250);
    --ink: oklch(24% 0.02 250); --ink-2: oklch(40% 0.02 250); --ink-3: oklch(55% 0.02 250);
    --signal: oklch(56% 0.13 200); --signal-dim: oklch(66% 0.10 200);
  }
}
:root[data-theme="light"] {
  --bg: oklch(97% 0.006 250); --bg-grid: oklch(94% 0.008 250);
  --panel: oklch(99% 0.004 250); --panel-2: oklch(96% 0.008 250);
  --line: oklch(88% 0.01 250); --line-soft: oklch(92% 0.008 250);
  --ink: oklch(24% 0.02 250); --ink-2: oklch(40% 0.02 250); --ink-3: oklch(55% 0.02 250);
  --signal: oklch(56% 0.13 200); --signal-dim: oklch(66% 0.10 200);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans);
  line-height: 1.55; font-size: clamp(15px, 0.9rem + 0.2vw, 17px);
  background-image: linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 44px 44px; background-position: -1px -1px;
}
a { color: var(--signal); text-underline-offset: 3px; }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }

.wrap { max-width: 1160px; margin: 0 auto; padding: clamp(1.2rem, 3vw, 2.6rem) clamp(1rem, 3vw, 2rem) 4rem; }

/* header */
.masthead { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 1.6rem; }
.brand-eyebrow { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--signal-dim); display: flex; align-items: center; gap: 0.5rem; }
.brand-eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--signal); display: inline-block; }
h1 { font-size: clamp(1.8rem, 1.2rem + 2.6vw, 3.1rem); line-height: 1.02; letter-spacing: -0.02em; margin: 0.5rem 0 0.4rem;
  font-weight: 680; }
h1 .glow { color: var(--signal); }
.lede { max-width: 46ch; color: var(--ink-2); margin: 0; }
.head-actions { flex: none; display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
@media (max-width: 560px) {
  .masthead { flex-direction: column; align-items: stretch; gap: 0.9rem; }
  .head-actions { justify-content: flex-start; }
  .toolbar { gap: 0.5rem 0.8rem; }
}
.pill-btn { flex: none; background: var(--panel); border: 1px solid var(--line); color: var(--ink-2);
  font-family: var(--mono); font-size: 0.75rem; padding: 0.5rem 0.75rem; border-radius: 999px; cursor: pointer;
  min-height: 40px; display: inline-flex; align-items: center; gap: 0.3rem;
  transition: border-color var(--ease) 0.2s, color var(--ease) 0.2s; }
.pill-btn:hover { border-color: var(--signal-dim); color: var(--ink); }
.pill-btn:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }
.stage-sub { color: var(--ink-3); font-size: 0.75rem; }

/* the hero instrument: timeline + verdict */
.stage {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1rem, 2.5vw, 1.6rem); margin-bottom: 1.2rem; position: relative; overflow: hidden;
}
.stage::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: linear-gradient(90deg, var(--c-instant), var(--c-snappy), var(--c-ok), var(--c-lag), var(--c-over)); opacity: 0.7; }
.stage-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 0.4rem; }
.stage-head h2 { font-size: 0.82rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3);
  font-weight: 600; margin: 0; font-family: var(--mono); }

.timeline { width: 100%; height: auto; display: block; }
.zone { opacity: 0.14; }
.zone-instant { fill: var(--c-instant); } .zone-snappy { fill: var(--c-snappy); }
.zone-ok { fill: var(--c-ok); } .zone-lag { fill: var(--c-lag); } .zone-over { fill: var(--c-over); }
.grid { stroke: var(--line); stroke-width: 1; stroke-dasharray: 2 4; }
.tick { fill: var(--ink-3); font-family: var(--mono); font-size: 15px; }
.seg { transition: opacity var(--ease) 0.2s; }
.seg-endpoint { fill: var(--s-endpoint); } .seg-network { fill: var(--s-network); }
.seg-asr { fill: var(--s-asr); } .seg-llm_ttft { fill: var(--s-llm_ttft); }
.seg-llm_sentence { fill: var(--s-llm_sentence); } .seg-tts { fill: var(--s-tts); } .seg-playout { fill: var(--s-playout); }
.seg-bottleneck { stroke: var(--ink); stroke-width: 2.5; }
.seg:focus-visible { outline: none; stroke: var(--signal); stroke-width: 2.5; }
.seg-tag { fill: oklch(18% 0.03 250); font-family: var(--mono); font-size: 14px; font-weight: 700; letter-spacing: 0.04em; }
.seg-val { fill: oklch(18% 0.03 250 / 0.85); font-family: var(--mono); font-size: 15px; font-weight: 600; }
.total-mark { stroke: var(--ink); stroke-width: 2; }
.total-label { fill: var(--ink); font-family: var(--mono); font-size: 18px; font-weight: 700; }
@media (prefers-reduced-motion: no-preference) {
  .seg { animation: grow 0.45s var(--ease); }
  @keyframes grow { from { transform: scaleX(0.6); opacity: 0; } to { transform: scaleX(1); opacity: 1; } }
}

.verdict { display: flex; align-items: center; gap: 1.1rem; margin-top: 1.1rem; padding: 0.9rem 1.1rem;
  border-radius: 10px; border: 1px solid var(--line); background: var(--panel-2); }
.verdict-total { display: flex; align-items: baseline; gap: 0.2rem; }
.verdict-num { font-family: var(--mono); font-variant-numeric: tabular-nums; font-size: clamp(2rem, 1.4rem + 2.4vw, 3.2rem);
  font-weight: 700; line-height: 1; color: var(--band-c, var(--signal)); }
.verdict-unit { font-family: var(--mono); color: var(--ink-3); font-size: 1rem; }
.verdict-label { font-size: 1.05rem; font-weight: 680; color: var(--band-c, var(--ink)); }
.verdict-desc { color: var(--ink-2); font-size: 0.92rem; }
.band-instant { --band-c: var(--c-instant); } .band-snappy { --band-c: var(--c-snappy); }
.band-ok { --band-c: var(--c-ok); } .band-lag { --band-c: var(--c-lag); } .band-over { --band-c: var(--c-over); }
.verdict { box-shadow: inset 3px 0 0 var(--band-c, var(--signal)); }
.verdict-load { font-family: var(--mono); font-size: 0.76rem; color: var(--ink-3); margin-top: 0.25rem; cursor: help; }
.verdict-delta { display: inline-block; margin-top: 0.4rem; font-size: 0.82rem; font-family: var(--mono);
  padding: 0.12rem 0.5rem; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-2); }
.verdict-delta.delta-slower { color: var(--c-lag); border-color: color-mix(in oklch, var(--c-lag) 40%, transparent); }
.verdict-delta.delta-faster { color: var(--c-instant); border-color: color-mix(in oklch, var(--c-instant) 40%, transparent); }

/* comparison row */
.seg-compare { opacity: 0.5; }
.compare-mark { stroke: var(--ink-3); stroke-width: 1.5; stroke-dasharray: 3 3; }
.compare-label { fill: var(--ink-3); font-family: var(--mono); font-size: 14px; }
.compare-total { fill: var(--ink-2); font-family: var(--mono); font-size: 15px; }

/* how-modeled note */
.model-note { margin-top: 0.9rem; border-top: 1px solid var(--line-soft); padding-top: 0.7rem; }
.model-note > summary { cursor: pointer; font-size: 0.8rem; color: var(--ink-3); font-family: var(--mono);
  letter-spacing: 0.04em; list-style: none; }
.model-note > summary::-webkit-details-marker { display: none; }
.model-note > summary::before { content: "▸ "; color: var(--signal-dim); }
.model-note[open] > summary::before { content: "▾ "; }
.model-note p { margin: 0.6rem 0 0; color: var(--ink-2); font-size: 0.88rem; max-width: 68ch; }
.model-note > summary:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; border-radius: 6px; }

#bottleneck { display: flex; align-items: center; gap: 0.6rem; margin-top: 0.7rem; font-size: 0.9rem; color: var(--ink-2); }
.bn-eyebrow { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--c-lag); border: 1px solid color-mix(in oklch, var(--c-lag) 40%, transparent);
  padding: 0.12rem 0.45rem; border-radius: 999px; }
#bottleneck strong { color: var(--ink); }
.bn-share { color: var(--ink-3); font-family: var(--mono); }

/* lower grid: console + breakdown */
.grid-2 { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 1.2rem; align-items: start; }
@media (max-width: 860px) { .grid-2 { grid-template-columns: 1fr; } }

.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 0.7rem 1rem; margin-bottom: 1rem; }
.toolbar label { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
select { background: var(--panel-2); color: var(--ink); border: 1px solid var(--line); border-radius: 8px;
  padding: 0.45rem 0.6rem; font-family: var(--sans); font-size: 0.9rem; min-height: 40px; }
select:focus-visible { outline: 2px solid var(--signal); outline-offset: 1px; }
.switch { display: inline-flex; align-items: center; gap: 0.5rem; cursor: pointer; }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch .track { width: 42px; height: 24px; border-radius: 999px; background: var(--line); position: relative;
  transition: background var(--ease) 0.2s; flex: none; }
.switch .track::after { content: ""; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--ink-2); transition: transform var(--ease) 0.25s, background var(--ease) 0.2s; }
.switch input:checked + .track { background: color-mix(in oklch, var(--signal) 45%, var(--line)); }
.switch input:checked + .track::after { transform: translateX(18px); background: var(--signal); }
.switch input:focus-visible + .track { outline: 2px solid var(--signal); outline-offset: 2px; }
#preset-note { color: var(--ink-3); font-size: 0.82rem; margin: 0 0 0.4rem; min-height: 1.2em; }

#console { display: flex; flex-direction: column; gap: 0.2rem; }
.ctl { padding: 0.75rem 0; border-top: 1px solid var(--line-soft); }
.ctl:first-child { border-top: none; }
body[data-mode="simple"] .ctl-adv { display: none; }
.ctl-head { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.ctl-label { font-weight: 560; font-size: 0.95rem; }
.ctl-short { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.1em; color: var(--ink-3);
  border: 1px solid var(--line); border-radius: 5px; padding: 0.1rem 0.4rem; }
.ctl-input { display: flex; align-items: center; gap: 0.7rem; margin: 0.5rem 0 0.35rem; }
.ctl-input input[type="range"] { flex: 1; accent-color: var(--signal); height: 24px; }
.num-input { width: 4.4rem; background: var(--panel-2); border: 1px solid var(--line); color: var(--ink);
  border-radius: 7px; padding: 0.4rem 0.5rem; font-family: var(--mono); font-variant-numeric: tabular-nums;
  text-align: right; min-height: 36px; }
.num-input:focus-visible { outline: 2px solid var(--signal); outline-offset: 1px; }
.unit { font-family: var(--mono); color: var(--ink-3); font-size: 0.8rem; }
.ctl-hint { margin: 0; color: var(--ink-3); font-size: 0.8rem; }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
#breakdown th { text-align: left; font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink-3); font-weight: 600; padding: 0 0.5rem 0.6rem; border-bottom: 1px solid var(--line); }
#breakdown th.num, #breakdown td.num { text-align: right; }
#breakdown td { padding: 0.55rem 0.5rem; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
.bd-stage { display: flex; align-items: center; gap: 0.5rem; }
.dot { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.dot-endpoint { background: var(--s-endpoint); } .dot-network { background: var(--s-network); }
.dot-asr { background: var(--s-asr); } .dot-llm_ttft { background: var(--s-llm_ttft); }
.dot-llm_sentence { background: var(--s-llm_sentence); } .dot-tts { background: var(--s-tts); } .dot-playout { background: var(--s-playout); }
.bd-share { display: flex; align-items: center; gap: 0.6rem; min-width: 120px; }
.bd-share .bar { height: 7px; border-radius: 4px; background: var(--signal-dim); max-width: 100px; }
.bd-pct { color: var(--ink-2); width: 3ch; text-align: right; }
.row-bottleneck td { background: color-mix(in oklch, var(--c-lag) 9%, transparent); }
.row-bottleneck .bd-stage { font-weight: 640; }

/* advice */
.advice-wrap { margin-top: 1rem; }
.advice-h { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600; margin: 0 0 0.5rem; }
.advice { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.45rem; }
.tip { display: flex; gap: 0.6rem; align-items: baseline; font-size: 0.9rem; color: var(--ink-2);
  padding: 0.55rem 0.7rem; border-radius: 8px; background: var(--panel-2); border: 1px solid var(--line-soft); }
.tip-mark { width: 7px; height: 7px; border-radius: 50%; flex: none; transform: translateY(-1px); }
.tip-good .tip-mark { background: var(--c-instant); }
.tip-ok .tip-mark { background: var(--c-ok); }
.tip-warn .tip-mark { background: var(--c-lag); }
.tip-warn { border-color: color-mix(in oklch, var(--c-lag) 30%, var(--line-soft)); }

.ctl-range { font-family: var(--mono); color: var(--signal-dim); font-size: 0.72rem; }

/* voice samples */
.samples-note { color: var(--ink-3); font-size: 0.86rem; margin: 0 0 1rem; max-width: 64ch; }
.samples { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.sample { background: var(--panel-2); border: 1px solid var(--line-soft); border-radius: 10px; padding: 0.8rem 0.9rem; }
.sample-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 0.5rem; margin-bottom: 0.35rem; }
.sample-lang { font-weight: 640; font-size: 0.9rem; color: var(--ink); }
.sample-link { font-family: var(--mono); font-size: 0.72rem; color: var(--signal); text-decoration: none;
  border: 1px solid var(--line); border-radius: 5px; padding: 0.1rem 0.4rem; }
.sample-link:hover { border-color: var(--signal-dim); }
.sample-link:focus-visible { outline: 2px solid var(--signal); outline-offset: 1px; }
.sample-text { margin: 0 0 0.6rem; color: var(--ink-2); font-size: 0.9rem; min-height: 2.6em; }
.sample-audio { width: 100%; height: 36px; display: block; }
.sample-dur { font-family: var(--mono); color: var(--ink-3); font-size: 0.72rem; margin-top: 0.35rem; }

/* references */
.refs { padding: 0; }
.refs > summary { cursor: pointer; padding: clamp(1rem, 2.5vw, 1.4rem); font-family: var(--mono); font-size: 0.78rem;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); list-style: none; }
.refs > summary::-webkit-details-marker { display: none; }
.refs > summary::before { content: "▸ "; color: var(--signal-dim); }
.refs[open] > summary::before { content: "▾ "; }
.refs > summary:focus-visible { outline: 2px solid var(--signal); outline-offset: -2px; border-radius: var(--radius); }
.ref-intro { margin: 0 clamp(1rem, 2.5vw, 1.4rem) 0.6rem; color: var(--ink-3); font-size: 0.85rem; }
.ref-list { margin: 0; padding: 0 clamp(1rem, 2.5vw, 1.4rem) 1.2rem 2rem; display: grid; gap: 0.4rem; font-size: 0.86rem; }
.ref-list li { color: var(--ink-2); }
.ref-date { color: var(--ink-3); }

footer { margin-top: 2.2rem; padding-top: 1.2rem; border-top: 1px solid var(--line); color: var(--ink-3); font-size: 0.82rem; }
footer code { font-family: var(--mono); color: var(--ink-2); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); border: 0; }