/* One light theme, by choice: the page is an engraved plate, ink on paper.
   The tuned region below is also the canvas's palette: src/view/palette.js
   reads it, and ?tuner turns it. */
:root {
  /*TUNE-BEGIN base*/
  --paper:oklch(0.985 0.006 90);
  --ink:oklch(0.255 0.013 55);
  --umber:oklch(0.80 0.045 62);
  --umber-pale:oklch(0.925 0.022 70);
  --ocher:oklch(0.915 0.055 88);
  --paynes:oklch(0.80 0.02 245);
  --brass:oklch(0.84 0.085 78);
  --vermilion:oklch(0.68 0.17 33);
  --ink-weight:1;
  --wash-opacity:0.8;
  --wash-shift:0.7;
  --wash-wander:1;
  /*TUNE-END*/
  --mute: color-mix(in oklab, var(--ink), var(--paper) 42%);
  --rule: color-mix(in oklab, var(--ink), var(--paper) 84%);
  --mark: color-mix(in oklab, var(--ink), var(--paper) 93%);
  --mark-lit: color-mix(in oklab, var(--ink), var(--paper) 90%);
  --accent: color-mix(in oklab, var(--vermilion), var(--ink) 18%);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Charter, Georgia, serif;
  color-scheme: light;
}

html { background: var(--paper); scroll-behavior: smooth; }
[hidden] { display: none !important; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  padding: 16px;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.5 var(--serif);
  -webkit-font-smoothing: antialiased;
}

/* The plate mark: a faint impression inset from the sheet's edge, a little
   darker on the top and left, where the plate's edge caught the light. */
.plate {
  max-width: 1560px;
  margin: 0 auto;
  padding: clamp(14px, 2.2vw, 30px);
  border: 1px solid var(--mark);
  border-radius: 3px;
  box-shadow: inset 1px 1px 0 var(--mark-lit);
}

.sc { font-variant-caps: all-small-caps; letter-spacing: 0.06em; }

.head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
h1 {
  margin: 0;
  font-weight: 400;
  font-size: 30px;
  line-height: 1.1;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.1em;
}
.sub { margin: 4px 0 0; font-style: italic; color: var(--ink); }

button {
  font: inherit;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 2px;
  padding: 5px 14px 7px;
  cursor: pointer;
  box-shadow: 1.5px 1.5px 0 var(--ink);
}
button:hover { background: color-mix(in oklab, var(--vermilion), var(--paper) 88%); }
button:active { transform: translate(1px, 1px); box-shadow: 0.5px 0.5px 0 var(--ink); }
button:focus-visible, input:focus-visible { outline: 1.5px solid var(--accent); outline-offset: 3px; }
.stops { display: flex; flex-wrap: wrap; gap: 10px 12px; }
#motor[aria-pressed="true"], #second[aria-pressed="true"] { background: color-mix(in oklab, var(--vermilion), var(--paper) 78%); }

.figures {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  gap: 20px 30px;
  align-items: start;
}
@media (max-width: 960px) { .figures { grid-template-columns: minmax(0, 1fr); } }
.side { display: grid; gap: 18px; }
figure { margin: 0; }
/* With the second rank drawn, the section is nearly twice as deep, so Fig. 2
   takes a row of its own under the other two. */
.figures > .fig2 { grid-column: 1 / -1; }
canvas { display: block; width: 100%; }
#keys { margin-top: 8px; touch-action: none; }
figcaption { margin-top: 6px; font-size: 14.5px; }
.octave-nav { margin: 8px 0 0; display: flex; gap: 10px; justify-content: space-between; }
.octave-nav[hidden] { display: none; }

.key {
  list-style: none;
  margin: 0;
  padding: 10px 0 0;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 2px 16px;
  font-size: 14.5px;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.05em;
}
.key i { font-variant-caps: normal; letter-spacing: 0; margin-right: 2px; }

.controls {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px 24px;
}
.controls label { display: grid; grid-template-columns: 1fr auto; align-items: baseline; align-content: start; gap: 0 8px; }
.controls .name { font-variant-caps: all-small-caps; letter-spacing: 0.06em; }
.controls output { font-style: italic; font-variant-numeric: tabular-nums; font-size: 14px; color: var(--mute); }
.controls input { grid-column: 1 / -1; }
.controls .ends { grid-column: 1 / -1; display: flex; justify-content: space-between; font-size: 12.5px; color: var(--mute); margin-top: -2px; }

/* A slider as an engraved scale: a hairline rule and an inked bead. */
input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 22px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 1px;
  background: var(--ink);
}
input[type="range"]::-moz-range-track {
  height: 1px;
  background: var(--ink);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 11px;
  height: 11px;
  margin-top: -5px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--ink);
  box-shadow: 1px 1px 0 var(--ink);
}
input[type="range"]::-moz-range-thumb {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--ink);
  box-shadow: 1px 1px 0 var(--ink);
}

.status { margin: 14px 0 0; font-size: 14.5px; color: var(--mute); }
#debug { margin: 6px 0 0; font: 12px ui-monospace, Menlo, monospace; color: var(--mute); }

.notes {
  margin-top: 26px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  display: grid;
  gap: 12px;
  max-width: 72ch;
}
.notes p { margin: 0; }
.colophon { color: var(--mute); font-size: 14.5px; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent); }