/* Shared chrome for the interactive examples in examples/.
 *
 * The palette is the one from wulffern/cicadc, so a student who has seen the
 * ADC visualiser recognises these pages as the same family. Every page is a
 * header, a canvas, a control panel, a legend and a bit of prose; the only
 * thing that differs between them is what the canvas draws.
 */

:root {
  --bg:     #0b0f1a;
  --edge:   #2b3a63;
  --grid:   #1d2742;
  --curve:  #3361e6;
  --quant:  #b6e3b6;
  --digi:   #cdd6e6;
  --error:  #ff4444;
  --sample: #ffd400;
  --text:   #e6f0ff;
  --accent: #39ff14;
  --alt:    #e63333;
  --alt2:   #9b6ec8;
  --muted:  #6080a0;
  --ctrl:   #0f1526;
  --wide:   1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg); color: var(--text);
  font-family: 'Courier New', monospace; font-size: 12px;
  display: flex; flex-direction: column; align-items: center;
  padding: 10px 10px 40px; gap: 8px;
}

a { color: var(--curve); }
a:hover { color: var(--text); }

/* ── Header ────────────────────────────────────────────────────────────── */

header { width: 100%; max-width: var(--wide); padding: 4px 0; }
header h1 { color: var(--curve); font-size: 16px; letter-spacing: 4px; }
header .sub { color: var(--muted); font-size: 11px; padding-top: 3px; }
header .sub a { text-decoration: none; }

/* ── Signal chain strip ────────────────────────────────────────────────── */

#chain { display: flex; align-items: center; gap: 4px; width: 100%; max-width: var(--wide); }
.cb {
  flex: 1; text-align: center; padding: 3px 0; font-size: 10px; letter-spacing: 1px;
  background: var(--grid); border: 1px solid var(--edge); color: var(--muted);
  transition: all 0.2s;
}
.cb.on { border-color: var(--curve); color: var(--curve); background: #0d1830; }
.ca { color: var(--edge); font-size: 10px; }

/* ── Canvas ────────────────────────────────────────────────────────────── */

canvas {
  display: block;
  background: var(--bg); border: 1px solid var(--edge);
  max-width: 100%;   /* fallback before the resize handler runs */
}

/* ── Controls ──────────────────────────────────────────────────────────── */

#ctrl {
  width: 100%; max-width: var(--wide);
  background: var(--ctrl); border: 1px solid var(--edge);
  padding: 10px 14px;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 8px 24px;
}
.cg { display: flex; flex-direction: column; gap: 6px; }
.cgt {
  color: var(--curve); font-size: 9px; letter-spacing: 2px;
  border-bottom: 1px solid var(--grid); padding-bottom: 3px; margin-bottom: 1px;
}
.cr { display: flex; align-items: center; gap: 6px; }
.cr label { color: var(--muted); min-width: 92px; flex-shrink: 0; font-size: 11px; }
.cr input[type=range] { flex: 1; min-width: 40px; accent-color: var(--curve); cursor: pointer; }
.cr .v { color: var(--text); min-width: 62px; text-align: right; font-size: 11px; }

.modebtn {
  background: var(--grid); border: 1px solid var(--edge); color: var(--text);
  padding: 3px 6px; cursor: pointer; font-family: inherit; font-size: 11px;
  text-align: center;
}
.modebtn.on { background: var(--curve); color: #fff; border-color: var(--curve); }
.modebtn:hover { border-color: var(--curve); }
/* Flex items refuse to shrink below their label width, so mode buttons are a
   grid: they wrap instead of overflowing the control cell. */
.moderow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 5px; }
.moderow.two  { grid-template-columns: repeat(2, 1fr); }
.moderow.four { grid-template-columns: repeat(4, 1fr); }

.ckrow { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 11px; }
.ckrow input { accent-color: var(--curve); cursor: pointer; }
.note { color: var(--muted); font-size: 10px; line-height: 1.7; }

button.act {
  width: 100%; padding: 5px; cursor: pointer; font-family: inherit; font-size: 12px;
  background: var(--grid); border: 1px solid var(--edge); color: var(--text);
}
button.act:hover { border-color: var(--curve); }

/* ── Readouts ──────────────────────────────────────────────────────────── */

#readout {
  width: 100%; max-width: var(--wide);
  display: flex; flex-wrap: wrap; gap: 4px 28px;
  border: 1px solid var(--edge); background: var(--ctrl); padding: 7px 14px;
}
#readout .ro { display: flex; gap: 7px; align-items: baseline; }
#readout .ro .k { color: var(--muted); font-size: 10px; letter-spacing: 1px; }
#readout .ro .n { color: var(--accent); font-size: 13px; }

/* ── Legend ────────────────────────────────────────────────────────────── */

#legend {
  width: 100%; max-width: var(--wide);
  display: flex; gap: 16px; flex-wrap: wrap;
  color: var(--muted); font-size: 10px; padding: 4px 2px;
}
.leg { display: flex; align-items: center; gap: 5px; }
.lsw { width: 20px; height: 3px; border-radius: 2px; }
.ldot { width: 8px; height: 8px; border-radius: 50%; }

/* ── Prose ─────────────────────────────────────────────────────────────── */

.doc {
  width: 100%; max-width: var(--wide);
  border-top: 1px solid var(--grid); margin-top: 10px; padding-top: 12px;
  font-family: Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6;
}
.doc h2 {
  color: var(--curve); font-family: 'Courier New', monospace;
  font-size: 12px; letter-spacing: 2px; margin: 16px 0 6px;
}
.doc h2:first-child { margin-top: 0; }
.doc p, .doc li { color: #b9c8e0; margin: 7px 0; }
.doc ul, .doc ol { padding-left: 22px; }
.doc code, .doc pre { font-family: 'Courier New', monospace; font-size: 12px; color: var(--quant); }
.doc pre {
  background: var(--ctrl); border: 1px solid var(--edge);
  padding: 10px 12px; overflow-x: auto; margin: 10px 0; line-height: 1.45;
}
.doc pre code { color: var(--digi); }
.doc .src { color: var(--muted); font-size: 12px; }

/* MathJax SVG has an intrinsic width, so a long formula would otherwise run
   off the side of the page rather than scale down with it. */
mjx-container { max-width: 100%; }
mjx-container svg { max-width: 100%; height: auto; }

/* ── Example index ─────────────────────────────────────────────────────── */

#cards {
  width: 100%; max-width: var(--wide);
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px;
}
.card {
  background: var(--ctrl); border: 1px solid var(--edge); padding: 12px 14px;
  display: flex; flex-direction: column; gap: 6px; text-decoration: none;
}
.card:hover { border-color: var(--curve); }
.card .t { color: var(--curve); font-size: 12px; letter-spacing: 2px; }
.card .d { color: #b9c8e0; font-family: Helvetica, Arial, sans-serif; font-size: 13px; line-height: 1.5; }
.card .m { color: var(--muted); font-size: 10px; }

/* ── Footer ────────────────────────────────────────────────────────────── */

footer {
  width: 100%; max-width: var(--wide);
  border-top: 1px solid var(--grid); margin-top: 12px; padding-top: 10px;
  color: var(--muted); font-size: 10px; line-height: 1.8;
}

/* ── Narrow screens ────────────────────────────────────────────────────── */

@media (max-width: 700px) {
  body  { padding: 4px 4px 30px; gap: 4px; }
  #ctrl { grid-template-columns: repeat(2, 1fr); }
  .cb   { font-size: 8px; padding: 2px 1px; letter-spacing: 0; }
  .ca   { font-size: 8px; }
  .cr label { min-width: 74px; }
  .modebtn { font-size: 10px; padding: 3px 2px; }
}

/* Two control columns leave a portrait phone's sliders ~25 px of track once
   the labels and readouts have taken their width, so stack the groups. */
@media (max-width: 480px) {
  #ctrl { grid-template-columns: 1fr; gap: 10px; }
}