/* Chirp — liner notes for an instrument. The app's ember panel (warm ground, amber accent,
   the track colours) carried into a long page; sections are bars on a beat ruler, and every
   example is a playable strip: command, waveform, notes as played, receipt.
   Display: Fraunces. Text: IBM Plex Sans. Notation and data: IBM Plex Mono. */

:root {
  --page-bg: #12110f;
  --page-text: #ece6de;
  --page-muted: #a39a92;
  --page-line: #302c29;
  --page-accent: #ffc45c;
  --page-ui: "IBM Plex Sans", system-ui, sans-serif;
  --panel: #191714;
  --raise: #221f1c;
  --faint: #8b8279;
  --beat: #2a2724;
  --barline: #4a4440;
  --accent: #ffc45c;
  --accent-ink: #1a1408;
  --t0: #e8684a; --t1: #f0b446; --t2: #78c878; --t3: #5ab4dc; --t4: #aa82e6; --t5: #e678b4;
  --err: #ff6f5c;
  --display: "Fraunces", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --measure: 68ch;
  color-scheme: dark;
}

html { background: var(--page-bg); scroll-padding-top: 64px; }
body { color: var(--page-text); font: 16.5px/1.65 var(--page-ui); }
a { color: var(--accent); text-underline-offset: 3px; text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent); }
a:hover { text-decoration-color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
::selection { background: color-mix(in srgb, var(--accent) 30%, transparent); }
code { font: 0.86em/1.4 var(--mono); color: #f3d9a8; }
p code, li code, td code, figcaption code { background: var(--raise); border-radius: 3px; padding: 0.06em 0.32em; }
strong { color: #fff6ea; font-weight: 600; }
em { font-style: italic; }

main { max-width: 1180px; margin: 0 auto; padding: 0 clamp(18px, 4vw, 52px); }
main p, main li { max-width: var(--measure); }

/* ── hero ─────────────────────────────────────────────────────────────────── */
.hero { display: grid; grid-template-columns: minmax(0, 1fr); gap: 32px; padding: clamp(36px, 7vh, 80px) 0 36px; }
@media (min-width: 1100px) { .hero { grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr); align-items: end; } }
.kicker { margin: 0 0 18px; font: 500 12px/1 var(--mono); letter-spacing: 0.06em; color: var(--faint); }
.kicker span { color: var(--accent); }
.hero h1 {
  margin: 0; font: 400 clamp(46px, 7vw, 96px)/0.95 var(--display); letter-spacing: -0.02em;
  font-variation-settings: "opsz" 144, "SOFT" 60;
}
.hero h1 em { color: var(--accent); font-style: italic; font-variation-settings: "opsz" 144, "SOFT" 100, "WONK" 1; }
.lede { margin: 24px 0 0; font-size: clamp(17px, 1.4vw, 19px); color: #d9d1c7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 0; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 3px;
  font: 600 14.5px/1 var(--page-ui); text-decoration: none; color: var(--page-text); border: 1px solid var(--barline);
}
.btn:hover { border-color: var(--page-text); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.primary:hover { background: #ffd27f; }
.hero-cue { margin: 0; }

/* ── the ruler (on-page navigation) ───────────────────────────────────────── */
.ruler {
  position: sticky; top: 0; z-index: 10; margin: 8px 0 0;
  background: color-mix(in srgb, var(--page-bg) 92%, transparent); backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--page-line);
}
.ruler ol { display: flex; gap: 0; list-style: none; margin: 0; padding: 0; overflow-x: auto; scrollbar-width: none; }
.ruler li { flex: 1 0 auto; max-width: none; }
.ruler a {
  display: flex; align-items: baseline; gap: 7px; padding: 12px 12px 10px; white-space: nowrap;
  font: 500 13px/1 var(--page-ui); color: var(--page-muted); text-decoration: none;
  border-left: 1px solid var(--barline);
  background: repeating-linear-gradient(90deg, transparent 0 calc(25% - 1px), var(--beat) calc(25% - 1px) 25%) 0 100% / 100% 5px no-repeat;
}
.ruler a b { font: 600 11px/1 var(--mono); color: var(--faint); }
.ruler a:hover, .ruler a[aria-current="true"] { color: var(--page-text); }
.ruler a[aria-current="true"] b { color: var(--accent); }

/* ── sections as bars ─────────────────────────────────────────────────────── */
.bar { padding-top: 56px; }
.bar h2 {
  position: relative; display: flex; align-items: baseline; gap: 16px; margin: 0 0 22px; padding-top: 18px;
  font: 400 clamp(30px, 3.6vw, 44px)/1.05 var(--display); letter-spacing: -0.01em; font-variation-settings: "opsz" 72;
  border-top: 2px solid var(--barline);
}
.bar h2::before {
  content: ""; position: absolute; left: 0; right: 0; top: -2px; height: 9px;
  background: repeating-linear-gradient(90deg, var(--barline) 0 1px, transparent 1px 25%);
}
.bar h2 .no { font: 600 13px/1 var(--mono); color: var(--accent); min-width: 22px; transform: translateY(-0.7em); }
.bar h3 { margin: 36px 0 10px; font: 600 19px/1.25 var(--page-ui); color: #fff6ea; }

.cols { display: grid; gap: 8px 44px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 980px) { .cols { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.cols h3:first-child { margin-top: 18px; }

.facts { list-style: none; padding: 0; margin: 26px 0 0; display: grid; gap: 14px; }
@media (min-width: 980px) { .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 44px; } }
.facts li { padding-left: 14px; border-left: 2px solid var(--barline); color: #d9d1c7; }
.facts b { color: #fff6ea; font-weight: 600; }

/* ── anatomy of a score line ──────────────────────────────────────────────── */
.anatomy { display: flex; flex-wrap: wrap; gap: 6px; margin: 26px 0 28px; }
.tok { flex: 1 1 120px; min-width: 0; padding: 10px 12px 12px; background: var(--panel); border-top: 3px solid var(--c); border-radius: 0 0 3px 3px; }
.tok code { display: block; font-size: 17px; font-weight: 600; color: var(--c); background: none; padding: 0; white-space: nowrap; }
.tok span { display: block; margin-top: 6px; font-size: 13px; line-height: 1.4; color: var(--page-muted); }
.t-set { --c: var(--t3); } .t-note { --c: var(--accent); } .t-rest { --c: var(--faint); } .t-art { --c: var(--t4); }

/* ── code and transcripts ─────────────────────────────────────────────────── */
pre { margin: 22px 0; padding: 16px 18px; overflow-x: auto; background: var(--panel); border-left: 2px solid var(--barline); border-radius: 0 3px 3px 0; scrollbar-width: thin; }
pre code { font-size: 13.5px; line-height: 1.6; color: #e9e0d4; background: none; padding: 0; }
.code .k { color: var(--t3); } .code .s { color: #f3d9a8; }
.term code { white-space: pre-wrap; overflow-wrap: anywhere; }
.term .p { color: #fff6ea; } .term .p::before { content: "$ "; color: var(--accent); }
.term .e { color: var(--err); } .term .c { color: var(--faint); }

/* ── playable examples ────────────────────────────────────────────────────── */
.cue { margin: 26px 0; padding: 14px 16px 12px; background: var(--panel); border: 1px solid var(--page-line); border-radius: 4px; }
.cue-head { display: flex; align-items: center; gap: 12px; min-width: 0; }
.play {
  flex: none; width: 38px; height: 38px; border-radius: 50%; border: 0; cursor: pointer;
  display: grid; place-items: center; background: var(--accent); color: var(--accent-ink);
}
.play svg { width: 15px; height: 15px; fill: currentColor; }
.play .i-stop, .play.on .i-play { display: none; }
.play.on .i-stop { display: block; }
.play:hover { background: #ffd27f; }
.cue-cmd {
  min-width: 0; overflow-x: auto; white-space: nowrap; font-size: 13.5px; color: #f3d9a8; padding: 4px 0; scrollbar-width: none;
}
.cue-code { flex: 1; margin: 0; padding: 8px 12px; border-left: 0; background: var(--raise); }
.cue-code code { font-size: 12.5px; }
.cue-wave { position: relative; margin: 12px 0 4px; cursor: pointer; --t: 0; }
.cue-wave svg { display: block; width: 100%; height: 56px; }
.cue-wave::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: calc(var(--t) * 100%);
  background: color-mix(in srgb, var(--accent) 10%, transparent); pointer-events: none;
}
.cue-head-line { position: absolute; top: -2px; bottom: -2px; left: calc(var(--t) * 100%); width: 2px; background: var(--accent); opacity: 0; }
.cue:has(.play.on) .cue-head-line { opacity: 1; }
.cue-roll { margin-top: 8px; }
.cue-roll svg { display: block; width: 100%; height: auto; }
.cue-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 4px 16px; margin: 10px 0 0; max-width: none;
  font: 12px/1.4 var(--mono); color: var(--faint);
}
.cue-meta b { color: var(--page-muted); font-weight: 600; }
.cue-meta code { font-size: 11.5px; color: var(--page-muted); background: none; padding: 0; }
.cue-open { margin-left: auto; font: 600 13px/1 var(--page-ui); text-decoration: none; }
.cue-open::after { content: " ↗"; }
.cue figcaption { margin-top: 8px; font-size: 14px; color: var(--page-muted); max-width: var(--measure); }
.duo { display: grid; gap: 0 20px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 1000px) { .duo { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.duo .cue-cmd { white-space: normal; overflow-wrap: anywhere; }

.shot { margin: 28px 0; }
.shot img { display: block; width: 100%; height: auto; border-radius: 4px; border: 1px solid var(--page-line); }
.shot figcaption { margin-top: 10px; font-size: 14px; color: var(--page-muted); }

/* ── figures and tables ───────────────────────────────────────────────────── */
.fig { margin: 28px 0; }
.fig svg { display: block; width: 100%; height: auto; }
.fig figcaption { margin-top: 10px; font-size: 14px; color: var(--page-muted); max-width: var(--measure); }
.fig figcaption b { color: var(--page-text); font-weight: 600; }

.fx { list-style: none; padding: 0; margin: 22px 0 6px; display: grid; gap: 1px; background: var(--page-line); border: 1px solid var(--page-line); max-width: none; }
.fx li { max-width: none; display: grid; grid-template-columns: 110px 1fr; gap: 12px; padding: 9px 14px; background: var(--panel); font: 13.5px/1.5 var(--mono); color: #e9e0d4; }
.fx b { font: 600 12px/1.6 var(--page-ui); text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--page-line); vertical-align: top; }
thead th { font: 600 11.5px/1.2 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; color: var(--faint); }
tbody th { font-weight: 500; color: var(--page-text); }
td { font: 14px/1.5 var(--mono); color: #f3d9a8; white-space: nowrap; }
.note { font-size: 14px; color: var(--page-muted); }

/* ── drawings ─────────────────────────────────────────────────────────────── */
.dg { --k: #d8d0c6; overflow: visible; }
.dg text { font-family: var(--page-ui); fill: var(--page-text); }
.dg .m { font-family: var(--mono); }
.dg .k-ink { --k: #d8d0c6; } .dg .k-accent { --k: var(--accent); }
.dg .k-a { --k: var(--t0); } .dg .k-b { --k: var(--t3); } .dg .k-c { --k: var(--t2); } .dg .k-d { --k: var(--t4); }
.dg .k-ok { --k: var(--t2); } .dg .k-warn { --k: var(--t1); } .dg .k-err { --k: var(--err); }
.dg .k-muted { --k: #7d746e; } .dg .k-file { --k: var(--t4); }
.dg .node { fill: #1d1b18; stroke: var(--k); stroke-width: 1.5; }
.dg .node.solid { fill: var(--k); }
.dg .node.ghost { stroke-dasharray: 4 3; fill: none; }
.dg .shadow { fill: color-mix(in srgb, var(--k) 20%, transparent); stroke: none; }
.dg .lbl { fill: #fff6ea; font-weight: 600; }
.dg .sub { fill: var(--page-muted); }
.dg .edge { fill: none; stroke: var(--k); }
.dg .edge.dash { stroke-dasharray: 6 4; }
.dg .edge.dot { stroke-dasharray: 1.5 4; stroke-linecap: round; }
.dg .tip { fill: var(--k); stroke: none; }
.dg .tip.open { fill: none; stroke: var(--k); stroke-width: 1.5; }
.dg .lab-bg { fill: var(--page-bg); }
.cue .dg .lab-bg { fill: var(--panel); }
.dg .elabel { fill: color-mix(in srgb, var(--k) 70%, var(--page-text)); }
.dg .halo { paint-order: stroke; stroke: var(--page-bg); stroke-width: 4px; stroke-linejoin: round; }
.dg .grp { fill: none; stroke: var(--k); stroke-width: 1; }
.dg .grp.dash { stroke-dasharray: 5 4; }
.dg .frame-tag { fill: var(--page-bg); stroke: var(--k); }
.dg .frame-tag-t { fill: var(--k); font-family: var(--mono); letter-spacing: 0.1em; }
.dg .note-t { fill: var(--page-muted); }
.dg .note { fill: var(--k); }
.dg rect.note[class] { stroke: none; }
.dg .life { stroke: var(--barline); stroke-dasharray: 2 4; }
.dg .frame { fill: none; stroke: var(--k); }
.dg .badge { fill: var(--k); }
.dg .badge-t { fill: var(--page-bg); font-family: var(--mono); font-weight: 600; }
.dg .lane { fill: transparent; }
.dg .lane.alt { fill: #1c1a17; }
.cue .dg .lane.alt { fill: #1e1c19; }
.dg line.bar { stroke: var(--barline); stroke-width: 1; }
.dg line.beat { stroke: var(--beat); stroke-width: 1; }
.dg .axis { fill: var(--faint); }
.dg .wave { fill: var(--k); fill-opacity: 0.85; }
.dg .zero { stroke: var(--beat); }
.dg .gen { fill: color-mix(in srgb, var(--k) 26%, transparent); stroke: var(--k); stroke-width: 1.2; }
.dg .gen.tail { fill: color-mix(in srgb, var(--k) 12%, transparent); stroke-dasharray: 3 3; }
.dg .glabel { fill: #fff6ea; }
.dg .range { fill: var(--k); }
.dg .range.ghost { fill: color-mix(in srgb, var(--k) 35%, transparent); }
.dg .pair { stroke: var(--faint); stroke-width: 1; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .cue { padding: 12px 12px 10px; margin-left: -6px; margin-right: -6px; }
  .cue-cmd { white-space: normal; overflow-wrap: anywhere; }
  .cue-meta { font-size: 12.5px; }
  .cue-meta .hash { display: none; }
  .code code, .cue-code code { white-space: pre-wrap; overflow-wrap: anywhere; }
  .fx li { grid-template-columns: 1fr; gap: 2px; }
  .ruler ol { scrollbar-width: none; }
  .ruler { -webkit-mask-image: linear-gradient(90deg, #000 85%, transparent); mask-image: linear-gradient(90deg, #000 85%, transparent); }
}

@media print {
  :root { --page-bg: #fff; --page-text: #111; --panel: #f6f3ee; --raise: #efe9e1; --page-line: #ccc; }
  .ruler, .play, .cue-open { display: none; }
}