:root {
  color-scheme: dark;
  --bg: #0c0e13;
  --panel: #141820;
  --panel-soft: #191e28;
  --line: #292f3b;
  --text: #f4f1e8;
  --muted: #9299a7;
  --accent: #b8f23c;
  --accent-dark: #17200b;
  --track-1: #59a7ff;
  --track-2: #ff665e;
  --track-3: #f4c84a;
  --track-4: #61d69a;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: radial-gradient(circle at 75% 0%, #1a2018 0, transparent 28rem), var(--bg); color: var(--text); }
button, input { font: inherit; }
button { color: inherit; }
.app-shell { width: min(1180px, calc(100% - 36px)); margin: 0 auto; padding: 30px 0 28px; }
.hero { margin-bottom: 22px; padding: 2px 0; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .18em; }
h1 { margin: 0; font-size: clamp(2.25rem, 5vw, 3.75rem); font-weight: 760; letter-spacing: -.055em; line-height: 1; }
.title-primary { color: #ffffff; }
.title-secondary { color: #747b87; }
.card { border: 1px solid var(--line); border-radius: 18px; background: rgba(20, 24, 32, .92); box-shadow: 0 18px 55px rgba(0,0,0,.18); }
.transport { display: grid; grid-template-columns: auto minmax(220px, 1fr) auto; gap: 22px; align-items: center; padding: 18px; margin-bottom: 18px; }
.play-button { display: flex; align-items: center; justify-content: center; gap: 10px; min-width: 126px; border: 0; border-radius: 12px; background: var(--accent); color: #10150a; font-weight: 800; padding: 14px 20px; cursor: pointer; transition: transform .16s, filter .16s; }
.play-button:hover { filter: brightness(1.08); transform: translateY(-1px); }
.play-button.playing .play-icon { font-size: 0; }
.play-button.playing .play-icon::after { content: "Ⅱ"; font-size: 1rem; }
.tempo-control { min-width: 0; }
.control-heading, .range-labels { display: flex; justify-content: space-between; }
.control-heading { margin-bottom: 8px; font-size: .82rem; font-weight: 700; }
.control-heading output { color: var(--accent); font-variant-numeric: tabular-nums; }
input[type="range"] { width: 100%; height: 4px; accent-color: var(--accent); cursor: pointer; }
.range-labels { color: #686f7c; font-size: .65rem; }
.secondary-button, .text-button { border: 1px solid #3a424f; border-radius: 10px; background: transparent; cursor: pointer; font-weight: 700; }
.secondary-button { padding: 12px 16px; }
.secondary-button:hover, .text-button:hover { border-color: var(--accent); color: var(--accent); }
.workspace { display: block; }
.editor-panel { padding: 24px; min-width: 0; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
h2 { margin: 0; font-size: 1.55rem; letter-spacing: -.03em; }
.text-button { padding: 9px 12px; font-size: .8rem; }
.track-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--track-color); box-shadow: 0 0 14px color-mix(in srgb, var(--track-color), transparent 45%); }
.track-name { flex: 1; font-size: .88rem; font-weight: 750; }
.reset-track { border: 0; background: none; color: #747c89; cursor: pointer; padding: 4px 6px; font-size: .62rem; }
.reset-track:hover:not(:disabled), .reset-track:focus-visible { color: var(--track-color); }
.reset-track:disabled { cursor: default; opacity: .3; }
.remove-track { border: 0; background: transparent; color: #6f7681; cursor: pointer; padding: 4px; }
.remove-track:hover { color: #ff817b; }
.stepper { display: flex; align-items: center; overflow: hidden; border: 1px solid #333a47; border-radius: 9px; }
.stepper button { width: 27px; height: 27px; border: 0; background: #1d222c; cursor: pointer; }
.stepper button:hover { color: var(--track-color); }
.beat-number-input { width: 34px; height: 27px; padding: 0 3px; border: 0; border-right: 1px solid #333a47; border-left: 1px solid #333a47; border-radius: 0; outline: 0; background: #141922; color: var(--text); text-align: center; font-size: .78rem; font-weight: 800; }
.beat-number-input:focus { box-shadow: inset 0 0 0 1px var(--track-color); }
.beat-number-input[aria-invalid="true"] { color: #ff817b; box-shadow: inset 0 0 0 1px #ff665e; }
.hint { color: var(--muted); font-size: .75rem; }
.visual-heading { display: block; margin-bottom: 16px; }
.visual-heading > .eyebrow { margin-bottom: 9px; }
.editor-heading-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.editor-actions { display: flex; align-items: center; gap: 10px; }
.map-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.map-helper { margin: 0; color: var(--muted); font-size: .72rem; }
.segmented, .guide-options { display: flex; padding: 3px; border: 1px solid var(--line); border-radius: 10px; background: #10131a; }
.guide-options { align-items: center; gap: 2px; }
.guide-options > span { padding: 0 6px; color: var(--muted); font-size: .68rem; }
.view-button, .guide-button { border: 0; border-radius: 7px; background: transparent; color: var(--muted); cursor: pointer; font-size: .72rem; font-weight: 750; padding: 7px 10px; }
.view-button.active, .guide-button.active { background: #292f39; color: var(--text); }
.guide-button { padding: 4px 8px; }
.visualization { position: relative; width: 100%; overflow: hidden; }
.timeline { width: 100%; padding-top: 4px; }
.timeline-map { --label-width: 130px; --map-gap: 18px; position: relative; padding: 12px 8px 14px; border-bottom: 1px solid var(--line); }
.timeline-row { display: grid; grid-template-columns: var(--label-width) minmax(0, 1fr); gap: var(--map-gap); align-items: center; min-height: 64px; }
.timeline-track-label { display: flex; align-items: center; gap: 8px; min-width: 0; color: #c9cdd5; font-size: .78rem; }
.timeline-track-label strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.inline-track-controls { min-width: 0; }
.inline-track-head { display: flex; align-items: center; gap: 8px; margin-bottom: 5px; }
.inline-control-row { display: flex; align-items: center; gap: 8px; width: min(390px, 100%); margin-top: 5px; }
.mini-label { color: #747c89; font-size: .6rem; font-weight: 750; letter-spacing: .05em; text-transform: uppercase; }
.volume-control { display: flex; align-items: center; gap: 7px; min-width: 0; flex: 1; margin-left: 5px; }
.volume-control input { width: 100%; min-width: 60px; accent-color: var(--track-color); }
.timeline-rail { position: relative; height: 48px; margin: 0 10px; }
.timeline-rail::before { content: ""; position: absolute; top: 50%; right: 0; left: 0; height: 2px; background: #444c59; transform: translateY(-50%); }
.beat-marker { position: absolute; z-index: 4; top: 50%; width: 12px; height: 12px; padding: 0; border: 2px solid var(--track-color); border-radius: 50%; background: var(--panel); cursor: pointer; transform: translate(-50%, -50%); transition: transform .08s, background .08s, opacity .08s; }
.beat-marker:hover, .beat-marker:focus-visible { outline: 2px solid color-mix(in srgb, var(--track-color), transparent 40%); outline-offset: 4px; transform: translate(-50%, -50%) scale(1.22); }
.beat-marker.downbeat { width: 16px; height: 16px; }
.beat-marker.muted { border-color: #626975; background: transparent; opacity: .42; }
.beat-marker.muted::after { content: ""; position: absolute; top: 50%; left: 50%; width: 14px; height: 1px; background: #8a919c; transform: translate(-50%, -50%) rotate(-45deg); }
.beat-marker.active { background: var(--track-color); transform: translate(-50%, -50%) scale(1.45); box-shadow: 0 0 18px var(--track-color); }
.playhead-lane { position: absolute; top: 20px; right: 18px; bottom: 20px; left: calc(8px + var(--label-width) + var(--map-gap) + 10px); pointer-events: none; }
.shared-start-boundary { position: absolute; z-index: 0; top: 0; bottom: 0; left: 0; width: 2px; background: #68717f; transform: translateX(-50%); }
.shared-guide { position: absolute; z-index: 0; top: 0; bottom: 0; width: 1px; background: #303743; transform: translateX(-50%); }
.shared-playhead { position: absolute; z-index: 3; top: 0; bottom: 0; width: 2px; background: #ffffff; box-shadow: 0 0 9px rgba(255,255,255,.6); transform: translateX(-50%); }
.track-controls-panel { margin-top: 14px; overflow: hidden; border: 1px solid #252b35; border-radius: 12px; background: rgba(12, 15, 21, .48); }
.panel-control-row { display: grid; grid-template-columns: minmax(135px, 1fr) auto minmax(145px, 1.25fr) auto auto; gap: 12px; align-items: center; min-height: 52px; padding: 9px 12px; border-bottom: 1px solid #252b35; }
.panel-control-row:last-child { border-bottom: 0; }
.control-track-name { display: flex; align-items: center; gap: 8px; min-width: 0; font-size: .72rem; color: #aeb4bf; }
.control-track-name strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.control-beats { display: flex; align-items: center; gap: 7px; }
.panel-control-row .volume-control { margin-left: 0; }
.clock-layout { display: grid; grid-template-columns: minmax(250px, 320px) minmax(300px, 1fr); align-items: center; gap: 28px; padding: 18px 8px 6px; }
.clock-track-list { align-self: stretch; display: flex; flex-direction: column; justify-content: center; }
.clock-track-list .inline-track-controls { padding: 13px 0; border-bottom: 1px solid var(--line); }
.clock-track-list .inline-track-controls:last-child { border-bottom: 0; }
.clock { width: min(390px, 100%); justify-self: center; overflow: visible; }
.clock-ring { fill: none; stroke: #2b313c; stroke-width: 1; }
.clock-beat { cursor: pointer; outline: none; }
.clock-hit { stroke: transparent; stroke-width: 20; }
.clock-tick { pointer-events: none; stroke-width: 5; stroke-linecap: round; opacity: .9; transition: stroke-width .08s, filter .08s, opacity .08s; }
.clock-beat:hover .clock-tick, .clock-beat:focus-visible .clock-tick { stroke-width: 9; filter: drop-shadow(0 0 4px currentColor); }
.clock-tick.muted { stroke: #646b76 !important; opacity: .32; stroke-dasharray: 3 4; }
.clock-tick.active { stroke-width: 9; filter: drop-shadow(0 0 5px currentColor); }
.clock-guide { stroke: #313743; stroke-width: 1; }
.clock-hand { stroke: #ffffff; stroke-width: 2; stroke-linecap: round; filter: drop-shadow(0 0 4px rgba(255,255,255,.55)); transform-origin: 150px 150px; }
.clock-center { fill: #ffffff; }
footer { padding: 24px 3px 0; color: #5e6570; font-size: .67rem; text-align: center; }

@media (max-width: 900px) {
  .transport { grid-template-columns: auto 1fr auto; }
}
@media (max-width: 620px) {
  .app-shell {
    --phone-gap: 6px;
    width: min(100% - 16px, 1180px);
    padding: 14px 0 18px;
  }
  .hero { margin-bottom: 12px; }
  h1 { font-size: clamp(1.55rem, 7.5vw, 1.9rem); white-space: nowrap; }
  .transport {
    grid-template-columns: minmax(64px, .72fr) minmax(90px, 1.2fr) minmax(72px, .85fr);
    gap: 8px;
    padding: 10px;
    margin-bottom: 12px;
  }
  .tempo-control { grid-column: auto; grid-row: auto; }
  .control-heading { margin-bottom: 4px; font-size: .68rem; }
  .range-labels { font-size: .55rem; }
  .play-button, .secondary-button { width: auto; min-width: 0; min-height: 40px; }
  .play-button { gap: 5px; padding: 10px 6px; font-size: .78rem; }
  .secondary-button { padding: 8px 6px; font-size: .7rem; white-space: nowrap; }
  .editor-panel { padding: 12px; }
  .visual-heading { margin-bottom: 10px; }
  .visual-heading > .eyebrow { margin-bottom: 6px; font-size: .62rem; }
  .editor-heading-row { align-items: center; gap: var(--phone-gap); }
  .editor-heading-row h2 { flex: 0 0 auto; font-size: 1rem; white-space: nowrap; }
  .editor-actions { flex: 0 0 auto; flex-direction: row; align-items: center; gap: 4px; }
  .editor-actions .text-button { padding: 4px 5px; font-size: .58rem; white-space: nowrap; }
  .segmented { padding: 2px; }
  .editor-actions .view-button { padding: 4px 5px; font-size: .58rem; }
  .map-toolbar { align-items: center; flex-flow: row nowrap; gap: var(--phone-gap); padding-bottom: 10px; }
  .map-helper { flex: 1 1 auto; min-width: 0; font-size: .62rem; line-height: 1.25; }
  .guide-options { flex: 0 0 auto; margin-left: auto; }
  .guide-options > span { padding: 0 4px; font-size: .6rem; }
  .guide-button { padding: 4px 6px; font-size: .62rem; }
  .timeline-map { --label-width: 84px; --map-gap: 6px; padding: 8px 0 10px; }
  .timeline-row { min-height: 52px; }
  .timeline-track-label { gap: 6px; font-size: .62rem; }
  .timeline-track-label strong { overflow: visible; line-height: 1.15; text-overflow: clip; white-space: normal; }
  .timeline-rail { height: 44px; margin: 0 6px; }
  .playhead-lane { right: 6px; left: calc(var(--label-width) + var(--map-gap) + 6px); }
  .track-controls-panel { margin-top: 10px; }
  .inline-control-row { width: 100%; flex-wrap: nowrap; gap: var(--phone-gap); }
  .mini-label { font-size: .55rem; }
  .stepper button { width: 25px; height: 25px; }
  .beat-number-input { width: 30px; height: 25px; font-size: .7rem; }
  .volume-control { min-width: 0; gap: 5px; margin-left: 0; }
  .panel-control-row {
    grid-template-columns: minmax(0, 1fr) auto 32px;
    grid-template-areas:
      "name reset remove"
      "beats volume volume";
    column-gap: 6px;
    row-gap: 6px;
    min-height: 0;
    padding: 8px 10px;
  }
  .control-track-name { grid-area: name; justify-self: stretch; width: 100%; font-size: .66rem; }
  .control-beats { grid-area: beats; }
  .panel-control-row .volume-control { grid-area: volume; min-width: 0; }
  .panel-control-row .volume-control input { min-width: 0; }
  .panel-control-row .reset-track {
    grid-area: reset;
    justify-self: end;
    min-height: 32px;
    padding: 6px 3px;
    font-size: .58rem;
  }
  .panel-control-row .remove-track {
    grid-area: remove;
    display: grid;
    place-items: center;
    justify-self: end;
    width: 32px;
    height: 32px;
    padding: 0;
  }
  .clock-layout { grid-template-columns: 1fr; gap: 4px; padding-top: 8px; }
  .clock { order: 1; }
  .clock-track-list { order: 2; }
  .clock-track-list .inline-track-controls { padding: 8px 2px; }
  .clock-track-list .inline-track-head { min-height: 32px; }
  .clock-track-list .track-name { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .clock-track-list .reset-track { min-height: 32px; padding: 6px 3px; }
  .clock-track-list .remove-track { display: grid; place-items: center; width: 32px; height: 32px; padding: 0; }
  .clock { width: min(310px, 100%); }
  footer { padding-top: 16px; }
}