:root {
  --paper: #f3ecdc; --panel: #f8f3e6; --ink: #2a2118; --soft: #7a6a55; --line: #c9bba0;
  --accent: #a3391f; --gas: #6b7d2a; --hatch: rgba(42, 33, 24, .16);
  --serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #1b1712; --panel: #231e17; --ink: #e9dfc8; --soft: #a39479; --line: #4a3f30; --accent: #e0714f; --gas: #a8bd55; --hatch: rgba(233, 223, 200, .16); }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--serif); line-height: 1.4; }
header { display: flex; justify-content: space-between; align-items: end; gap: 24px; flex-wrap: wrap; padding: 28px 24px 16px; max-width: 1280px; margin: 0 auto; border-bottom: 3px double var(--ink); }
h1 { margin: 0; font-size: 56px; letter-spacing: .12em; line-height: 1; }
.sub { margin: 8px 0 0; max-width: 62ch; color: var(--soft); font-style: italic; }
.vol { font-size: 13px; color: var(--soft); display: flex; align-items: center; gap: 8px; }
main { max-width: 1280px; margin: 0 auto; padding: 20px 24px; display: grid; grid-template-columns: 3fr 2fr; gap: 18px; }
.plate { background: var(--panel); border: 1px solid var(--line); padding: 14px 16px 16px; min-width: 0; }
.wide { grid-column: 1 / -1; }
h2 { margin: 0 0 10px; font-size: 15px; font-weight: normal; letter-spacing: .04em; border-bottom: 1px solid var(--line); padding-bottom: 6px; }
h2 span { font-variant: small-caps; font-weight: bold; margin-right: 6px; }
h2 small { color: var(--soft); font-style: italic; margin-left: 10px; }
.cap { margin: 8px 0 0; font-size: 13px; font-style: italic; color: var(--soft); }
canvas { width: 100%; display: block; touch-action: none; }
#cut { aspect-ratio: 1200 / 840; cursor: grab; }
#scope, #spec { aspect-ratio: 4 / 1; border: 1px solid var(--line); margin-bottom: 8px; }
.read { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 4px 0 12px; }
.read dt { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--soft); }
.read dd { margin: 0; font-family: var(--mono); font-size: 20px; }
.gas-top { display: flex; justify-content: space-between; font-size: 13px; }
.gas-top span:last-child { font-family: var(--mono); }
.bar { height: 12px; border: 1px solid var(--ink); margin: 4px 0 10px; }
.bar i { display: block; height: 100%; width: 100%; background: var(--gas); }
.bar.low i { background: var(--accent); }
button { font: inherit; font-size: 14px; color: var(--ink); background: transparent; border: 1px solid var(--ink); padding: 5px 12px; cursor: pointer; border-radius: 2px; }
button:hover { background: var(--hatch); }
button[aria-pressed="true"], button.on { background: var(--ink); color: var(--paper); }
button:focus-visible, input:focus-visible, #pad:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chiprow { display: grid; grid-template-columns: 70px 1fr; align-items: center; margin-top: 10px; font-size: 13px; color: var(--soft); }
#pad { position: relative; aspect-ratio: 5 / 3; border: 1px solid var(--ink); cursor: crosshair; touch-action: none; user-select: none;
  background-image: linear-gradient(var(--hatch) 1px, transparent 1px), linear-gradient(90deg, var(--hatch) 1px, transparent 1px); background-size: 10% 20%; }
#pad.down { background-color: var(--hatch); }
#padDot { position: absolute; width: 18px; height: 18px; margin: -9px; border-radius: 50%; border: 2px solid var(--accent); pointer-events: none; }
#pad.down #padDot { background: var(--accent); }
.ax { position: absolute; font-size: 11px; font-style: italic; color: var(--soft); pointer-events: none; }
.ax-x { right: 6px; bottom: 3px; } .ax-y { left: 4px; top: 4px; writing-mode: vertical-rl; transform: rotate(180deg); }
#sliders { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 18px; }
.sl { display: grid; grid-template-columns: 1fr auto; font-size: 13px; }
.sl output { font-family: var(--mono); font-size: 12px; color: var(--soft); }
.sl input { grid-column: 1 / -1; }
input[type=range] { width: 100%; accent-color: var(--accent); margin: 2px 0; }
#keys { position: relative; display: flex; height: 120px; margin-bottom: 10px; user-select: none; touch-action: none; }
.key { flex: 1; border: 1px solid var(--ink); margin-right: -1px; display: flex; align-items: end; justify-content: center; font-size: 10px; color: var(--soft); padding-bottom: 4px; cursor: pointer; background: var(--panel); }
.key.black { flex: 0 0 0; position: relative; z-index: 1; border: 0; margin: 0; padding: 0; }
.key.black::before { content: ''; position: absolute; left: -11px; top: 0; width: 22px; height: 72px; background: var(--ink); border-radius: 0 0 2px 2px; }
.key.on, .key.black.on::before { background: var(--accent); }
#presets { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.card { text-align: left; padding: 10px 12px; display: block; }
.card b { display: block; font-size: 16px; }
.card i { display: block; font-size: 12px; color: var(--accent); }
.card span { display: block; font-size: 12px; color: var(--soft); margin-top: 4px; }
.card:hover span, .card:hover i { color: inherit; }
.seq-top { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; font-size: 13px; }
.seq-top label { display: flex; align-items: center; gap: 8px; } .seq-top input { width: 160px; } .seq-top output { font-family: var(--mono); }
#seq { display: grid; gap: 4px; overflow-x: auto; }
.row { display: grid; grid-template-columns: 64px repeat(16, minmax(22px, 1fr)); gap: 4px; align-items: center; font-size: 13px; }
.step { aspect-ratio: 1; padding: 0; border-color: var(--line); min-width: 22px; }
.step:nth-child(4n+2) { border-color: var(--ink); }
.step.on { background: var(--ink); }
.step.now { box-shadow: 0 0 0 2px var(--accent); }
footer { max-width: 1280px; margin: 0 auto; padding: 8px 24px 40px; font-size: 12px; font-style: italic; color: var(--soft); }
#start { position: fixed; inset: 0; background: var(--paper); display: grid; place-items: center; text-align: center; z-index: 10; }
#start p { font-style: italic; color: var(--soft); margin: 12px 0 20px; }
#start button { font-size: 18px; padding: 10px 24px; }
#start.hide { display: none; }
@media (max-width: 860px) {
  main { grid-template-columns: 1fr; padding: 14px; }
  h1 { font-size: 40px; }
  #presets { grid-template-columns: 1fr 1fr; }
  #sliders { grid-template-columns: 1fr; }
}