/* ARIA demo — "journal / lab": warm paper, serif display, one deep-blue accent,
   white-panel narrowband spectrograms as paper figures. Sober, rigorous, phonetics-first. */
:root{
  --paper:#faf8f4; --paper-2:#efeae1; --panel:#ffffff;
  --ink:#1c1b19; --body:#3b3833; --muted:#6b6660; --dim:#7a746b;
  --line:#e7e1d6; --line-2:#d8d1c3;
  --accent:#2f5d8c;            /* steel blue — sparing */
  --accent-2:#3a4a63;          /* quiet slate for interactive */
  --serif:"Source Serif 4",Georgia,"Times New Roman",serif;
  --sans:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --maxw:1000px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0; background:var(--paper); color:var(--body);
  font-family:var(--sans); font-size:16.5px; line-height:1.65; -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 32px}
.mono{font-family:var(--mono)}
.muted{color:var(--muted)}
h1,h2{font-family:var(--serif); color:var(--ink); margin:0; line-height:1.15; font-weight:600}
h3,h4{font-family:var(--sans); color:var(--ink); margin:0; font-weight:600}
a{color:var(--accent-2)}
a:hover{color:var(--accent)}
.eyebrow,.kicker{font-size:12px; font-weight:600; letter-spacing:.12em; text-transform:uppercase;
  color:var(--accent)}

/* ---------- buttons ---------- */
.btn{display:inline-block; padding:10px 18px; border-radius:7px; font-weight:600; font-size:14.5px;
  border:1px solid var(--line-2); cursor:pointer; background:#fff; color:var(--ink);
  font-family:var(--sans); transition:.14s; text-decoration:none}
.btn:hover{text-decoration:none}
.btn.primary{background:var(--accent); color:#fff; border-color:var(--accent)}
.btn.primary:hover{background:#244a70}
.btn.ghost:hover{border-color:var(--accent); color:var(--accent)}
.btn.sm{padding:6px 13px; font-size:13px; border-radius:6px}
.btn[aria-disabled="true"]{opacity:.45; pointer-events:none}

/* ---------- hero ---------- */
.hero{padding:64px 0 52px; border-bottom:1px solid var(--line)}
.kicker{display:block; margin-bottom:20px}
.hero h1{font-size:68px; font-weight:700; letter-spacing:-.015em; margin-bottom:14px}
.tagline{font-family:var(--serif); font-size:22px; line-height:1.4; color:var(--ink);
  max-width:680px; margin:0 0 20px}
.tagline em{font-style:italic; color:var(--accent)}
.lede{max-width:660px; margin:0 0 30px; color:var(--body); font-size:17px}
.lede b{color:var(--ink); font-weight:600}
.stats{display:grid; grid-template-columns:repeat(3,1fr); gap:26px; max-width:760px; margin:0 0 32px;
  padding:22px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line)}
.stats div{min-width:0}
.stats dt{font-family:var(--serif); font-size:30px; font-weight:600; color:var(--ink); line-height:1}
.stats dd{margin:8px 0 0; font-size:13px; color:var(--muted); line-height:1.4}
.cta{display:flex; gap:12px; flex-wrap:wrap}

/* ---------- sections ---------- */
.section{padding:64px 0; border-bottom:1px solid var(--line)}
.section.alt{background:var(--paper-2)}
.section h2{font-size:34px; letter-spacing:-.01em; margin:8px 0 0}
.eyebrow{display:block}
.sub{color:var(--body); max-width:680px; margin:16px 0 30px; font-size:16px}
.block-h{font-size:15px; text-transform:uppercase; letter-spacing:.06em; color:var(--muted);
  margin:36px 0 14px; padding-bottom:8px; border-bottom:1px solid var(--line)}

/* ---------- studio controls ---------- */
.studio{background:var(--panel); border:1px solid var(--line); border-radius:12px;
  padding:24px 26px; margin-bottom:26px}
.field-label{display:block; font-size:11.5px; font-weight:600; letter-spacing:.05em;
  text-transform:uppercase; color:var(--muted); margin-bottom:10px}
.pills{display:flex; flex-wrap:wrap; gap:8px}
.pill{padding:8px 14px; border-radius:999px; border:1px solid var(--line-2); background:#fff;
  color:var(--ink); font-size:13.5px; font-weight:500; cursor:pointer; transition:.13s; font-family:var(--sans)}
.pill:hover{border-color:var(--accent)}
.pill.active{background:var(--accent); border-color:var(--accent); color:#fff}
.ctrl-note{margin:12px 0 0; font-size:14px; color:var(--muted)}
.ctrl-note b{color:var(--ink)}

.stepper{margin-top:24px}
.stepper-head{display:flex; justify-content:space-between; align-items:baseline}
.step-val{color:var(--accent); font-size:14px; font-weight:500}
input[type=range]{width:100%; height:4px; border-radius:3px; appearance:none; margin:14px 0 8px;
  background:var(--line-2); cursor:pointer}
input[type=range]::-webkit-slider-thumb{appearance:none; width:18px; height:18px; border-radius:50%;
  background:var(--accent); border:3px solid #fff; box-shadow:0 0 0 1px var(--line-2); cursor:pointer}
input[type=range]::-moz-range-thumb{width:15px; height:15px; border-radius:50%; background:var(--accent); border:3px solid #fff; cursor:pointer}
.ends{display:flex; justify-content:space-between; align-items:center; font-size:13px; color:var(--ink); font-weight:600}
.ends .axis{font-weight:400; font-size:12px; color:var(--dim)}
.slider-hint{font-size:13px; margin:10px 0 0}

.studio-actions{display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin-top:22px;
  padding-top:18px; border-top:1px solid var(--line)}
.kbd-hint{font-size:11.5px; color:var(--dim); margin-left:auto}

/* ---------- spectrogram plates (the 3 syllables) ---------- */
.plate-row{display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:18px; margin-bottom:30px}
.plate{margin:0; background:var(--panel); border:1px solid var(--line); border-radius:11px;
  overflow:hidden; box-shadow:0 2px 10px rgba(60,55,45,.07); transition:box-shadow .15s, outline-color .15s;
  outline:2px solid transparent}
.plate-spec.img-missing{min-height:120px; background:var(--paper-2);
  display:flex; align-items:center; justify-content:center}
.plate-spec.img-missing::after{content:"spectrogram unavailable"; color:var(--muted); font-size:12px; font-family:var(--mono)}
.plate.playing{outline-color:var(--accent); box-shadow:0 4px 16px rgba(47,93,140,.16)}
.plate-cap{display:flex; align-items:center; gap:10px; padding:11px 14px 8px}
.plate-syl{font-family:var(--serif); font-size:20px; font-weight:600; color:var(--ink); line-height:1}
.plate-vals{flex:1; font-family:var(--mono); font-size:11.5px; color:var(--dim)}
.plate-play{background:#fff; color:var(--ink); border:1px solid var(--line-2); border-radius:6px;
  font-size:12px; padding:4px 11px; cursor:pointer; font-family:var(--sans)}
.plate-play:hover{border-color:var(--accent); color:var(--accent); background:#fff}
.plate-spec{width:100%; display:block}
.plate-audio{width:calc(100% - 24px); margin:10px 12px 6px; height:32px}

/* ---------- companion chart + figures ---------- */
.chart-fig,.plate-fig{margin:0}
.chart-fig figcaption,.plate-fig figcaption{font-size:13px; color:var(--muted); margin-top:10px;
  max-width:640px; line-height:1.5}
.vowelchart{height:330px; background:#fff; border:1px solid var(--line); border-radius:10px; padding:8px}
.ltas-fig{width:100%; display:block; border:1px solid var(--line); border-radius:10px; background:#fff}
.chart-fig{min-height:360px}   /* reserve height so the nasal chart↔LTAS swap doesn't reflow */
.plate-syl .dot{font-size:.7em; vertical-align:.1em; margin-right:1px}

/* ---------- accessibility ---------- */
:focus-visible{outline:2px solid var(--accent); outline-offset:2px; border-radius:4px}
.pill:focus-visible,.plate-play:focus-visible,.btn:focus-visible{outline-offset:3px}
input[type=range]:focus-visible{outline:2px solid var(--accent); outline-offset:4px}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *{transition-duration:.001ms !important; animation-duration:.001ms !important; scroll-behavior:auto !important}
}
.plate-fig img{width:100%; max-width:760px; display:block; border:1px solid var(--line); border-radius:10px; background:#fff}

/* ---------- method: table + cards ---------- */
.tablewrap{overflow-x:auto; margin-bottom:8px}
.dimtable{width:100%; border-collapse:collapse; font-size:14.5px; min-width:560px}
.dimtable th{text-align:left; font-size:11px; text-transform:uppercase; letter-spacing:.06em;
  color:var(--muted); font-weight:600; padding:0 14px 9px; border-bottom:1px solid var(--line-2)}
.dimtable td{padding:11px 14px; border-bottom:1px solid var(--line); color:var(--body); vertical-align:top}
.dimtable tr:last-child td{border-bottom:none}
.dimtable td:first-child{color:var(--ink); font-weight:600; white-space:nowrap}
.dimtable .k{display:inline-block; font-family:var(--mono); font-size:12.5px; border:1px solid var(--line-2);
  border-radius:5px; padding:1px 7px; color:var(--accent); background:#fff; margin:1px 0}
.cards{display:grid; grid-template-columns:repeat(2,1fr); gap:18px}
.card{background:#fff; border:1px solid var(--line); border-radius:10px; padding:20px 22px}
.card h4{font-size:16px; margin-bottom:9px}
.card p{color:var(--body); font-size:14.5px; margin:0; line-height:1.6}
.card.scope{background:var(--paper-2)}
.links{display:flex; gap:10px; margin-top:30px; flex-wrap:wrap}

/* ---------- other voices (CSMSC / LJ) ---------- */
.voice{margin:0 0 34px}
.voice + .voice{padding-top:30px; border-top:1px solid var(--line)}
.voice-h{display:flex; align-items:baseline; justify-content:space-between; gap:14px;
  flex-wrap:wrap; margin-bottom:14px}
.voice-h h3{font-family:var(--sans); font-size:18px; font-weight:600; letter-spacing:-.005em}
.voice-tag{font-family:var(--sans); font-size:12px; font-weight:600; letter-spacing:.04em;
  text-transform:uppercase; color:var(--accent); border:1px solid var(--line-2);
  border-radius:999px; padding:2px 10px; margin-left:8px; vertical-align:middle}
.voice-meta{font-size:12.5px; color:var(--dim)}
/* full sentences are wide ⇒ fit-as-many, collapse to 1 column when narrow */
.plate-row.v-plates{grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); margin-bottom:0}
.dimtable .num{font-family:var(--mono); font-size:13.5px; color:var(--ink); font-weight:400; font-variant-numeric:tabular-nums; text-align:right}
.dimtable th.num{text-align:right}
.mos td:last-child,.mos th:last-child{border-left:1px solid var(--line-2)}

/* ---------- footer ---------- */
footer{padding:30px 0; color:var(--muted); font-size:13px}
footer .wrap{display:flex; justify-content:space-between; gap:18px; flex-wrap:wrap; align-items:center}

@media(max-width:760px){
  .wrap{padding:0 22px}
  .hero h1{font-size:52px}
  .section h2{font-size:28px}
  .stats{grid-template-columns:1fr; gap:18px}
  .plate-row{grid-template-columns:1fr}
  .kbd-hint{display:none}
}

/* synthesis-quality: natural-vs-ARIA resynthesis A/B */
#reconAB{display:flex; flex-direction:column; gap:16px; margin:6px 0 34px}
.recon{margin:0; background:var(--panel); border:1px solid var(--line); border-radius:11px; padding:16px 18px}
.recon-head{font-family:var(--serif); font-size:19px; font-weight:600; color:var(--ink); margin-bottom:10px}
.recon-head .muted{font-size:14px; font-weight:400}
.recon-pair{display:grid; grid-template-columns:1fr 1fr; gap:18px}
.recon-tag{display:block; font:600 11px/1.6 var(--mono); text-transform:uppercase; letter-spacing:.07em; color:var(--dim)}
.recon-one img{width:100%; border:1px solid var(--line); border-radius:7px; margin:3px 0 6px; display:block; background:#fff}
.recon-one audio{width:100%; height:34px}
/* full-width, bulleted limitations card */
.card.scope{grid-column:1/-1}
.card.scope ul{margin:8px 0 0; padding-left:18px}
.card.scope li{margin:5px 0}
/* table captions */
.dimtable caption{caption-side:bottom; text-align:left; font-size:12.5px; color:var(--muted); padding:8px 2px 0; line-height:1.45; max-width:680px}
@media(max-width:640px){.recon-pair{grid-template-columns:1fr} .cards{grid-template-columns:1fr}}