/* flatus — landing page.
 *
 * Visual language: warm paper + warm ink, oxblood accent, modern grotesque
 * (Inter) for UI labels and a serif (Charter / system serif) for the wordmark
 * and prose. No frameworks. No build step. The page is one HTML, one CSS,
 * one JS module, one WASM bundle.
 */

@font-face {
  font-family: "Inter var";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url("https://rsms.me/inter/font-files/InterVariable.woff2?v=4.0") format("woff2-variations");
}

:root {
  --paper: #f7f1e3;
  --paper-2: #efe7d2;
  --ink: #1a1612;
  --ink-2: #3a3128;
  --muted: #8d836d;
  --rule: #d9cfb7;
  --rule-soft: #e8e0c8;
  --accent: #8c2f1e;
  --accent-2: #b14533;
  --warm: #ef7e57;
  --annotation: #33536e;

  --font-display: "Charter", "Iowan Old Style", "Source Serif Pro", "Apple Garamond", Cambria, Georgia, serif;
  --font-ui: "Inter var", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "Berkeley Mono", "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  --shadow-soft: 0 1px 0 rgba(26, 22, 18, 0.03), 0 18px 36px -24px rgba(26, 22, 18, 0.14);
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #15110d;
    --paper-2: #1d1812;
    --ink: #f0e7d3;
    --ink-2: #cbc0a8;
    --muted: #8b806b;
    --rule: #2c241b;
    --rule-soft: #221c15;
    --accent: #d96446;
    --accent-2: #ef7e57;
    --warm: #ef7e57;
    --annotation: #6c9bb6;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.6 var(--font-ui);
  font-feature-settings: "ss01", "cv11", "tnum";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(239, 126, 87, 0.10), transparent 60%),
    radial-gradient(900px 600px at 0% 110%, rgba(140, 47, 30, 0.06), transparent 60%),
    radial-gradient(1400px 900px at 50% 50%, transparent 55%, rgba(38, 28, 18, 0.07) 100%);
  z-index: 0;
}

/* Paper grain — SVG turbulence tiled & multiplied into the warm paper color.
 * The texture is fixed to the viewport so it reads as the page substrate
 * itself rather than something painted onto the scroll content. Cards, code
 * blocks, and the canvas have their own backgrounds and naturally mask the
 * grain — letting it show through margins is the point. */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 480 480'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.48' numOctaves='2' seed='7' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.48 0'/></filter><rect width='480' height='480' filter='url(%23n)'/></svg>");
  background-size: 480px 480px;
  background-repeat: repeat;
  opacity: 0.16;
  mix-blend-mode: multiply;
  z-index: 0;
}

@media (prefers-color-scheme: dark) {
  body::after {
    opacity: 0.09;
    mix-blend-mode: screen;
  }
}

.page {
  position: relative;
  z-index: 1;
  max-width: 1040px;
  margin: 0 auto;
  padding: 2rem clamp(1rem, 4vw, 2.5rem) 5rem;
}

/* ---------- hero ---------- */

.hero {
  padding: clamp(1.25rem, 5vw, 3rem) 0 3rem;
}

.wordmark {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(4.5rem, 14vw, 9rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
}

.tagline {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
  color: var(--ink-2);
  margin: 0.45rem 0 1.75rem;
  letter-spacing: 0.015em;
  max-width: 32rem;
}

/* Entrance: wordmark settles in, tagline trails, banner fades up.
 * Guarded behind no-preference so motion-sensitive users get static. */
@media (prefers-reduced-motion: no-preference) {
  .wordmark { animation: enter-fall 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .tagline  { animation: enter-fade 0.7s 0.18s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .banner   { animation: enter-up 0.9s 0.30s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .elevator { animation: enter-fade 0.7s 0.42s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .cta-row  { animation: enter-fade 0.7s 0.55s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .cta-hint { animation: enter-fade 0.7s 0.65s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
}
@keyframes enter-fall {
  from { opacity: 0; transform: translateY(-12px) rotate(-1deg); letter-spacing: 0em; }
  to   { opacity: 1; transform: translateY(0) rotate(0); letter-spacing: -0.02em; }
}
@keyframes enter-fade {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes enter-up {
  from { opacity: 0; transform: translateY(20px) scale(0.985); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Reveal sections as they enter the viewport. JS toggles .revealed. */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
    will-change: opacity, transform;
  }
  .reveal.revealed { opacity: 1; transform: translateY(0); }
}

.banner {
  margin: 0 0 2rem;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--rule) 78%, transparent);
  border-radius: var(--radius);
  background: #15161b;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  position: relative;
  aspect-ratio: 1200 / 320;
}
.banner img,
.banner picture {
  display: block;
  width: 100%;
  height: 100%;
}
.banner img {
  object-fit: cover;
  pointer-events: none;
  transition: transform 0.6s cubic-bezier(0.2, 0.6, 0.2, 1), filter 0.3s ease;
}

.banner-button {
  appearance: none;
  border: 1px solid var(--rule);
  cursor: pointer;
  font: inherit;
  color: inherit;
  width: 100%;
  display: block;
  text-align: left;
}
.banner-button:hover img { transform: scale(1.015); filter: brightness(1.06); }
.banner-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.banner-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: screen;
}

.banner-hint { display: none; }

.elevator {
  font-family: var(--font-display);
  font-size: 1.12rem;
  line-height: 1.62;
  color: var(--ink-2);
  max-width: 36rem;
  margin: 0 0 1.9rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 0.65rem;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.8rem 1.15rem;
  border-radius: var(--radius);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease, color 0.12s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.cta.primary {
  background: var(--accent);
  color: #f7f1e3;
  border-color: var(--accent);
  box-shadow: 0 1px 0 rgba(140, 47, 30, 0.3), 0 8px 24px -10px rgba(140, 47, 30, 0.55);
}
.cta.primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(140, 47, 30, 0.35), 0 12px 30px -10px rgba(140, 47, 30, 0.7);
}
.cta.primary .cta-meta {
  font-weight: 400;
  font-size: 0.78rem;
  opacity: 0.78;
  font-family: var(--font-mono);
  letter-spacing: 0;
}
.cta.primary .cta-label { font-size: 1.02rem; }
.cta.primary[data-state="ready"] .cta-label::after {
  content: " →";
  opacity: 0.7;
}

.cta.ghost {
  background: transparent;
  color: var(--ink-2);
  border: 1px solid var(--rule-soft);
}
.cta.ghost:hover {
  color: var(--ink);
  border-color: var(--rule);
  background: color-mix(in srgb, var(--paper-2) 65%, transparent);
}

.cta-hint {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0;
  letter-spacing: 0.01em;
}

/* ---------- install steps (revealed after download) ---------- */

.install {
  margin: 0 0 1.25rem;
  padding: 1.5rem 1.4rem 1.35rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-2) 72%, transparent);
  box-shadow: var(--shadow-soft);
}
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.85rem;
}
.steps li {
  display: grid;
  grid-template-columns: 1.5rem 1fr;
  gap: 0.85rem;
  align-items: baseline;
}
.steps .step-n {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}
.steps .step-b {
  font-family: var(--font-display);
  font-size: 1.02rem;
  color: var(--ink-2);
  line-height: 1.55;
}
.steps code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--paper-2);
  padding: 0.05em 0.35em;
  border-radius: 3px;
  color: var(--ink);
}
.steps strong { color: var(--ink); font-weight: 600; }
.install-foot {
  font-family: var(--font-ui);
  font-size: 0.86rem;
  color: var(--muted);
  margin: 1rem 0 0;
  line-height: 1.55;
}

.install-lede {
  font-family: var(--font-display);
  font-size: 1.02rem;
  line-height: 1.55;
  color: var(--ink-2);
  margin: 0 0 1rem;
}
.install-lede strong { color: var(--ink); font-weight: 600; }
.install-lede em { color: var(--accent); font-style: italic; }
.install-lede code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--paper-2);
  padding: 0.05em 0.35em;
  border-radius: 3px;
  color: var(--ink);
}

/* Primary install path — show the copy button by default (not on hover) so
 * first-timers see the affordance immediately, and frame the block with an
 * oxblood left rail to mark it as the recommended one-liner. */
.install-oneliner {
  border-left: 2px solid var(--accent);
  padding-left: 1.15rem;
}
.install-oneliner .codeblock-copy { opacity: 1; }

.install-manual {
  margin-top: 1.5rem;
  border-top: 1px dashed var(--rule);
  padding-top: 1rem;
}
.install-manual > summary {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--muted);
  cursor: pointer;
  list-style: none;
  padding: 0.25rem 0;
}
.install-manual > summary::-webkit-details-marker { display: none; }
.install-manual > summary::before {
  content: "▸ ";
  display: inline-block;
  transition: transform 0.15s ease;
  color: var(--accent);
}
.install-manual[open] > summary::before { content: "▾ "; }
.install-manual > summary:hover { color: var(--ink-2); }
.install-manual .steps { margin-top: 1rem; }

/* ---------- section heads ---------- */

.section-head { margin-bottom: 1.25rem; }

.caption {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.82rem;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 0.35rem;
  font-weight: 400;
}
.section-sub {
  font-family: var(--font-ui);
  font-size: 0.98rem;
  color: color-mix(in srgb, var(--ink-2) 84%, var(--muted));
  margin: 0;
  max-width: 38rem;
  line-height: 1.68;
}

/* ---------- instrument (live synth) ---------- */

.instrument {
  padding: 3.25rem 0 0;
  position: relative;
}
.instrument-margin {
  position: absolute;
  top: 3.5rem;
  right: 0;
  width: 12rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
}
.instrument-margin dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 0.85rem;
}
.instrument-margin dt { color: var(--muted); }
.instrument-margin dd { margin: 0; color: var(--ink-2); }

@media (max-width: 880px) {
  .instrument-margin { position: static; width: auto; margin-top: 1.5rem; }
}

.console {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin: 0.5rem 0 1.5rem;
  padding-right: 13rem;
}
@media (max-width: 880px) {
  .console { padding-right: 0; }
}

.ctrl {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  margin: 0;
  padding: 0.8rem 0.95rem 0.95rem;
  background: color-mix(in srgb, var(--paper-2) 78%, transparent);
  box-shadow: 0 1px 0 rgba(26, 22, 18, 0.02);
}
.ctrl legend {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0 0.35em;
  margin-left: -0.35em;
}
.ctrl legend output {
  margin-left: 0.6em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* ---------- personality (card-style radio group) ---------- */

.personalities {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
  margin-top: 0.5rem;
}
.personality {
  appearance: none;
  position: relative;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink-2);
  padding: 0.55rem 0.7rem 0.55rem 1.1rem;
  border-radius: 8px;
  font-family: var(--font-ui);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  letter-spacing: -0.005em;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
  text-transform: lowercase;
}
.personality::before {
  content: "";
  position: absolute;
  left: 0.55rem;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0;
  transform: translateY(-50%);
  transition: opacity 0.12s ease;
}
.personality:hover { border-color: var(--ink-2); color: var(--ink); }
.personality[aria-pressed="true"] {
  background: var(--paper-2);
  border-color: var(--ink-2);
  color: var(--ink);
}
.personality[aria-pressed="true"]::before { opacity: 1; color: var(--accent); }

/* ---------- pressure (rounded track + ink thumb, mono readout) ---------- */

.ctrl-pressure legend output {
  display: inline-flex;
  align-items: center;
  height: 18px;
  padding: 0 0.45rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink);
}

#pressure {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--rule);
  border-radius: 999px;
  outline: none;
  margin: 1rem 0 0.5rem;
}
#pressure::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--paper);
  box-shadow: 0 1px 4px rgba(26, 22, 18, 0.25);
  cursor: pointer;
}
#pressure::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--paper);
  box-shadow: 0 1px 4px rgba(26, 22, 18, 0.25);
  cursor: pointer;
}
.ctrl-scale {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- seed (input bar with nested replay square) ---------- */

.seed-field {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  width: 100%;
  height: 36px;
  margin-top: 0.55rem;
  padding: 4px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--paper);
  transition: border-color 0.12s ease, background 0.12s ease;
}
.seed-field:hover { border-color: var(--ink-2); }
.seed-field:focus-within { border-color: var(--ink); }

#seed {
  flex: 1;
  min-width: 0;
  height: 100%;
  padding: 0 0.55rem;
  border: none;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
  outline: none;
  -moz-appearance: textfield;
}
#seed::-webkit-outer-spin-button,
#seed::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.seed-replay {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: var(--paper-2);
  color: var(--ink-3, var(--ink-2));
  cursor: pointer;
  transition: color 0.12s ease, background 0.12s ease;
}
.seed-replay:hover { color: var(--accent); background: var(--paper); }
.seed-replay:active { transform: scale(0.94); }
.seed-replay-icon { display: block; }

/* ---------- output cap (segmented pill) ---------- */

.seg {
  display: inline-flex;
  gap: 2px;
  margin-top: 0.55rem;
  padding: 3px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper);
  width: 100%;
}
.seg-opt {
  flex: 1;
  display: block;
  cursor: pointer;
}
.seg-opt input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}
.seg-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  padding: 6px 10px;
  border-radius: 999px;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--ink-2);
  transition: background 0.12s ease, color 0.12s ease;
  text-align: center;
  line-height: 1.15;
}
.seg-pill .seg-meta {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.seg-opt:hover .seg-pill { color: var(--ink); }
.seg-opt input:checked + .seg-pill {
  background: var(--ink);
  color: var(--paper);
}
.seg-opt input:checked + .seg-pill .seg-meta { color: var(--paper-2); }
.seg-opt input:focus-visible + .seg-pill {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.render-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 0.5rem;
  padding-right: 13rem;
}
@media (max-width: 880px) {
  .render-row { padding-right: 0; }
}

.render {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--accent);
  color: #f7f1e3;
  border: none;
  padding: 0.95rem 1.5rem;
  border-radius: 999px;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.1s ease, background 0.1s ease, box-shadow 0.12s ease;
  box-shadow: 0 1px 0 rgba(140, 47, 30, 0.3), 0 8px 24px -10px rgba(140, 47, 30, 0.55);
}
.render:hover { background: var(--accent-2); transform: translateY(-1px); }
.render:active { transform: translateY(0); }
.render:disabled {
  background: var(--muted);
  cursor: not-allowed;
  opacity: 0.7;
  box-shadow: none;
  transform: none;
}
.render-arrow { width: 16px; height: 16px; }

.link-quiet {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px dashed var(--rule);
  padding-bottom: 1px;
}
.link-quiet:hover { color: var(--accent); border-bottom-color: var(--accent); }

.render-status {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.waveform {
  display: block;
  width: 100%;
  height: 220px;
  margin-top: 1.5rem;
  background: #15161b;
  border: 1px solid color-mix(in srgb, var(--rule) 82%, transparent);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 0 rgba(255, 243, 214, 0.05), 0 8px 24px -18px rgba(26, 22, 18, 0.18);
}

/* ---------- specimens ---------- */

.specimens {
  padding: 3.25rem 0 0;
}
.specimen-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.specimen {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1rem 1.05rem 0.95rem;
  background: color-mix(in srgb, var(--paper-2) 78%, transparent);
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  overflow: hidden;
  position: relative;
}
.specimen::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(60% 60% at 50% 100%, rgba(239, 126, 87, 0.10), transparent 70%);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.specimen:hover {
  border-color: var(--ink-2);
  box-shadow: 0 10px 24px -20px rgba(26, 22, 18, 0.18);
}
.specimen:hover::after { opacity: 1; }

.specimen-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
}
.specimen .name {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.specimen .play {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: transform 0.15s ease, color 0.15s ease;
}
.specimen:hover .play { transform: translateX(2px); color: var(--accent-2); }

.specimen-wave {
  display: block;
  width: 100%;
  height: 56px;
  background: #15161b;
  border-radius: 4px;
  border: 1px solid rgba(217, 207, 183, 0.4);
}

.specimen .desc {
  font-family: var(--font-ui);
  font-size: 0.93rem;
  color: var(--ink-2);
  letter-spacing: 0;
  flex: 1;
  line-height: 1.52;
}

.specimen-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}
.specimen-dl {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dashed var(--rule);
  padding: 0 0.2em 1px;
  letter-spacing: 0.05em;
  transition: color 0.12s, border-color 0.12s;
}
.specimen-dl:hover {
  color: var(--accent-2);
  border-bottom-color: var(--accent-2);
}

/* ---------- cli ---------- */

.cli {
  padding: 3.25rem 0 0;
}
.codeblock {
  background: color-mix(in srgb, var(--paper-2) 78%, transparent);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  margin: 0;
  position: relative;
  box-shadow: 0 8px 24px -20px rgba(26, 22, 18, 0.14);
}
.codeblock-copy {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  appearance: none;
  background: var(--paper);
  border: 1px solid var(--rule);
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.7rem;
  border-radius: 4px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.codeblock:hover .codeblock-copy,
.codeblock:focus-within .codeblock-copy { opacity: 1; }
.codeblock-copy:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.codeblock-copy[data-state="copied"] { color: var(--accent); border-color: var(--accent); opacity: 1; }
.codeblock code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--ink);
  white-space: pre;
}
.codeblock .prompt { color: var(--accent); user-select: none; padding-right: 0.4em; }
.codeblock .comment { color: var(--muted); }

/* ---------- ledger (specifications) ---------- */

.ledger {
  padding: 3.25rem 0 0;
}
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
  background: color-mix(in srgb, var(--paper-2) 78%, transparent);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
  display: block;
  padding: 0.25rem 0.75rem;
  box-shadow: 0 8px 24px -20px rgba(26, 22, 18, 0.14);
}
.spec-table tbody { display: table; width: 100%; border-collapse: collapse; }
.spec-table th,
.spec-table td {
  padding: 0.6rem 0.5rem;
  text-align: left;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
.spec-table tr:last-child th,
.spec-table tr:last-child td { border-bottom: none; }
.spec-table th {
  font-weight: 500;
  color: var(--muted);
  width: 14rem;
  text-transform: lowercase;
  letter-spacing: 0.04em;
}
.spec-table td { color: var(--ink-2); }

/* ---------- colophon ---------- */

.colophon {
  padding: 4rem 0 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  text-align: center;
}
.colophon-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem 1.1rem;
  margin-bottom: 0.3rem;
}
.colophon-nav a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.colophon-nav a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.qed {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--ink);
  margin: 0.5rem 0 0;
}
.qed::after {
  content: " \220E"; /* halmos / tombstone ∎ — classical Q.E.D. companion */
  font-style: normal;
  margin-left: 0.35em;
  color: var(--accent);
  vertical-align: -0.04em;
}
.copy {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
  margin: 0;
}

/* ---------- figures: paper-canvas inline visuals ---------- */

.figure {
  margin: 3rem 0 2.5rem;
  padding: 0.75rem;
  background: color-mix(in srgb, var(--paper-2) 78%, transparent);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px -20px rgba(26, 22, 18, 0.14);
}
.figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--radius) - 2px);
}
.figure figcaption {
  font-family: var(--font-ui);
  font-size: 0.86rem;
  line-height: 1.55;
  color: color-mix(in srgb, var(--ink-2) 82%, var(--muted));
  margin: 0.75rem 0.25rem 0.15rem;
  text-align: center;
}
.figure-inset {
  margin: 2.5rem 0 1rem;
}

/* ---------- print: hide interactive bits ---------- */
@media print {
  .cta-row, .render-row, .waveform, .console, .specimens, .install { display: none; }
  body::before { display: none; }
}