/* Cyrinx — datasheet-you-can-hear. Tokens first, everything derives. */

@font-face {
  font-family: 'IBM Plex Sans Condensed';
  font-style: normal; font-weight: 600; font-display: swap;
  src: url('fonts/IBMPlexSansCondensed-600.woff2') format('woff2');
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal; font-weight: 400; font-display: swap;
  src: url('fonts/IBMPlexSans-400.woff2') format('woff2');
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal; font-weight: 600; font-display: swap;
  src: url('fonts/IBMPlexSans-600.woff2') format('woff2');
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal; font-weight: 400; font-display: swap;
  src: url('fonts/IBMPlexMono-400.woff2') format('woff2');
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal; font-weight: 500; font-display: swap;
  src: url('fonts/IBMPlexMono-500.woff2') format('woff2');
}

:root {
  --paper: #F6F5F2;
  --ink: #191624;
  --ink-2: #6B6675;
  --accent: #5B21B6;        /* violet — the quiet end of the magma colormap */
  --hot: #E8890C;           /* signal amber — reserved for signal energy */
  --panel: #12101A;         /* instrument inset */
  --panel-ink: #C9C4D4;
  --line: #DAD7CF;
  --display: 'IBM Plex Sans Condensed', 'Arial Narrow', sans-serif;
  --body: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', monospace;
  --measure: 44rem;
  --gutter: clamp(1.25rem, 5vw, 4rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* ---- top bar ---- */
.topbar {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap;
  padding: 1.1rem var(--gutter);
  border-bottom: 1px solid var(--line);
}
.wordmark {
  font-family: var(--mono); font-weight: 500; font-size: 1.05rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink); text-decoration: none;
}
.topbar nav { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.topbar nav a {
  font-family: var(--mono); font-size: 0.82rem; letter-spacing: 0.04em;
  color: var(--ink-2); text-decoration: none;
}
.topbar nav a:hover { color: var(--accent); }
.mono-note { color: var(--ink-2); }

/* ---- hero ---- */
.hero { padding: clamp(2.5rem, 7vh, 5rem) var(--gutter) 3rem; max-width: 72rem; margin: 0 auto; }
.eyebrow {
  font-family: var(--mono); font-size: 0.8rem; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent);
  margin: 0 0 1.2rem;
}
h1 {
  font-family: var(--display); font-weight: 600;
  font-size: clamp(2.7rem, 7.5vw, 5.4rem);
  line-height: 0.98; letter-spacing: -0.015em;
  margin: 0 0 1.4rem; max-width: 20ch;
}
h1 em { font-style: normal; color: var(--accent); }
.thesis { max-width: var(--measure); font-size: 1.15rem; margin: 0 0 2.6rem; }
.thesis strong { font-family: var(--mono); font-weight: 500; font-size: 0.95em; white-space: nowrap; }

/* ---- the instrument ---- */
.instrument {
  margin: 0; border: 1px solid var(--line); border-radius: 10px;
  background: #FCFBF9; overflow: hidden;
  box-shadow: 0 1px 0 rgba(25, 22, 36, 0.04), 0 12px 40px -18px rgba(25, 22, 36, 0.25);
}
.instrument-head {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 1rem; flex-wrap: wrap;
  padding: 0.8rem 1.1rem;
  border-bottom: 1px solid var(--line);
}
.inst-title { font-family: var(--mono); font-weight: 500; font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; }
.inst-params { font-family: var(--mono); font-size: 0.75rem; color: var(--ink-2); }
.spectro-wrap { position: relative; background: var(--panel); }
#spectrogram { display: block; width: 100%; height: clamp(200px, 32vw, 300px); }
.anatomy {
  position: absolute; inset: auto 0 0 0; display: flex;
  border-top: 1px solid rgba(201, 196, 212, 0.25);
  background: rgba(18, 16, 26, 0.55); backdrop-filter: blur(2px);
}
.anat {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.06em;
  color: var(--panel-ink); text-transform: uppercase;
  padding: 0.35rem 0.5rem 0.4rem; overflow: hidden; white-space: nowrap;
  border-left: 1px solid rgba(201, 196, 212, 0.35);
}
.anat:first-child { border-left: 0; }
.anat small { display: block; text-transform: none; letter-spacing: 0; color: rgba(201, 196, 212, 0.6); }
.instrument-foot {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: 0.85rem 1.1rem;
}
#listen {
  font-family: var(--mono); font-weight: 500; font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--panel); background: var(--hot);
  border: 0; border-radius: 999px; padding: 0.55rem 1.1rem;
  cursor: pointer;
}
#listen:hover { filter: brightness(1.07); }
#listen[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.foot-note { font-size: 0.85rem; color: var(--ink-2); max-width: 34rem; }

/* ---- sections ---- */
.sec { padding: clamp(2.8rem, 8vh, 5rem) var(--gutter); max-width: 72rem; margin: 0 auto; border-top: 1px solid var(--line); }
.sec > p, .sec .register, .sec .prior, .sec > .ladder { max-width: var(--measure); }
h2 {
  font-family: var(--display); font-weight: 600;
  font-size: clamp(1.7rem, 3.4vw, 2.4rem); line-height: 1.05;
  letter-spacing: -0.01em; margin: 0 0 1.2rem;
}
.secmark {
  font-family: var(--mono); font-weight: 500; font-size: 0.55em;
  color: var(--accent); vertical-align: 0.5em; margin-right: 0.6em;
  letter-spacing: 0.1em;
}
h3 { font-family: var(--body); font-weight: 600; font-size: 1.05rem; margin: 2rem 0 0.5rem; }

/* results table */
.table-scroll { overflow-x: auto; margin: 1.6rem 0; }
table { border-collapse: collapse; width: 100%; max-width: 58rem; font-size: 0.95rem; }
th {
  font-family: var(--mono); font-weight: 500; font-size: 0.72rem;
  text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-2);
  text-align: left; padding: 0.5rem 1rem 0.5rem 0;
  border-bottom: 2px solid var(--ink);
}
td { padding: 0.6rem 1rem 0.6rem 0; border-bottom: 1px solid var(--line); vertical-align: top; }
td.num { font-family: var(--mono); font-weight: 500; white-space: nowrap; }
tr.hot td { background: linear-gradient(90deg, rgba(232, 137, 12, 0.10), transparent 70%); }
tr.hot td.num { color: var(--hot); filter: brightness(0.82); }
.dim { color: var(--ink-2); }
.aside { font-size: 0.95rem; color: var(--ink-2); border-left: 3px solid var(--hot); padding-left: 1rem; }

/* how it works */
.chain { padding-left: 1.2rem; margin: 0.8rem 0; }
.chain li { margin: 0.55rem 0; }
.chain b { font-weight: 600; }

.constellation-panel {
  margin: 1.4rem 0 0; border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel); overflow: hidden; max-width: 34rem;
}
#constellation { display: block; width: 100%; aspect-ratio: 2 / 1.15; }
.const-controls { padding: 0.8rem 1rem 1rem; background: #FCFBF9; border-top: 1px solid var(--line); }
.const-controls label {
  font-family: var(--mono); font-size: 0.8rem; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2);
  display: flex; gap: 0.6rem; align-items: baseline;
}
.const-controls output { color: var(--ink); font-size: 0.95rem; }
input[type="range"] { width: 100%; margin: 0.5rem 0 0.2rem; accent-color: var(--accent); }
.verdict { font-family: var(--mono); font-size: 0.8rem; margin: 0.3rem 0 0; min-height: 1.4em; }
.verdict.ok { color: #1A7F37; }
.verdict.bad { color: #B3261E; }

/* degradation ladder */
.ladder { list-style: none; padding: 0; margin: 1.8rem 0; }
.ladder li {
  display: grid; grid-template-columns: minmax(9rem, 16rem) 1fr auto;
  align-items: center; gap: 0.9rem; padding: 0.45rem 0;
}
.rung-label { font-size: 0.92rem; line-height: 1.25; }
.rung-label small { display: block; color: var(--ink-2); font-size: 0.8rem; }
.rung-bar {
  display: block; height: 14px; width: var(--w); border-radius: 3px;
  background: linear-gradient(90deg, #3B0F70, #8C2981 45%, #DE4968 75%, #FE9F6D);
  min-width: 6px;
}
.rung-val { font-family: var(--mono); font-weight: 500; font-size: 0.9rem; white-space: nowrap; }

/* prior art */
.prior { margin: 1.4rem 0; }
.prior div { display: grid; grid-template-columns: minmax(7rem, 10rem) 1fr; gap: 1rem; padding: 0.5rem 0; border-bottom: 1px dotted var(--line); }
.prior dt { font-family: var(--mono); font-weight: 500; font-size: 0.9rem; }
.prior dd { margin: 0; color: var(--ink-2); font-size: 0.95rem; }

/* paper & code */
.cta-row { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); max-width: 58rem; }
.cta {
  display: block; text-decoration: none; color: var(--ink);
  border: 1px solid var(--line); border-radius: 10px; padding: 1.2rem 1.3rem;
  background: #FCFBF9;
  transition: border-color 120ms ease, transform 120ms ease;
}
.cta:hover { border-color: var(--accent); color: var(--ink); transform: translateY(-1px); }
.cta-kind { display: block; font-family: var(--mono); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.5rem; }
.cta-title { display: block; font-family: var(--display); font-weight: 600; font-size: 1.35rem; line-height: 1.15; margin-bottom: 0.4rem; }
.cta-sub { display: block; font-size: 0.85rem; color: var(--ink-2); }

/* footer */
.foot { border-top: 1px solid var(--line); padding: 1.6rem var(--gutter) 2.2rem; }
.foot p { font-family: var(--mono); font-size: 0.75rem; color: var(--ink-2); max-width: 72rem; margin: 0 auto; }

@media (max-width: 640px) {
  .anat small { display: none; }
  .ladder li { grid-template-columns: 1fr; gap: 0.25rem; }
  .rung-val { order: -1; }
  .prior div { grid-template-columns: 1fr; gap: 0.15rem; }
}

@media (prefers-reduced-motion: reduce) {
  .cta { transition: none; }
}