:root {
  --bg: #080b0f;
  --bg-2: #0d1117;
  --panel: #11161d;
  --panel-2: #151b24;
  --border: #262e3a;
  --text: #e6e9ef;
  --text-2: #98a7b3;
  --cyan: #00e5ff;
  --purple: #9b5cff;
  --orange: #ff9a3c;
  --green: #2ee6a6;
  --red: #ff4d6d;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Consolas, monospace;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  color-scheme: dark;
  font-variant-numeric: tabular-nums;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 1024px; background: var(--bg); color: var(--text); }
button, input, select { font: inherit; }
button { border: 1px solid var(--border); background: var(--panel-2); color: var(--text); border-radius: 6px; padding: 8px 12px; cursor: pointer; transition: border-color .15s, color .15s, background .15s; }
button:hover:not(:disabled) { border-color: var(--cyan); color: var(--cyan); }
button:disabled { opacity: .4; cursor: not-allowed; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

.app-shell { min-height: 100vh; }

/* ===== HEADER ===== */
.topbar { height: 72px; display: flex; align-items: center; gap: 24px; padding: 0 24px; border-bottom: 1px solid var(--border); background: var(--bg-2); }
.brand { display: flex; align-items: center; gap: 12px; min-width: 330px; }
.brand-mark { display: grid; place-items: center; width: 32px; height: 32px; border: 1px solid var(--cyan); color: var(--cyan); border-radius: 7px; font-size: 12px; font-weight: 700; font-family: var(--mono); letter-spacing: .04em; box-shadow: 0 0 10px rgba(0, 229, 255, .25) inset, 0 0 6px rgba(0, 229, 255, .18); }
.brand h1 { font-size: 18px; letter-spacing: .1em; margin: 0; font-weight: 700; color: var(--text); }
.hint { color: var(--text-2); font-size: 10px; line-height: 1.45; }
.pan-note-disabled { color: var(--orange); font-weight: 650; font-size: 11px; }
.header-meta { display: flex; gap: 14px; align-items: center; color: var(--text-2); font-size: 11px; font-family: var(--mono); flex: 1; white-space: nowrap; position: relative; top: 2px; }
.status-dot::before { content: '●'; color: var(--orange); margin-right: 5px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; pointer-events: none; }
.header-credit { color: var(--text-2); font-size: 11px; position: relative; top: 2.5px; }
.header-credit a { color: var(--cyan); }

.workspace { max-width: 1440px; margin: 0 auto; padding: 24px; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; }
.wave-panel { padding: 16px 18px 12px; }
.panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.eyebrow { font-size: 12px; letter-spacing: .14em; color: var(--text-2); font-weight: 650; text-transform: uppercase; }
.panel h2 { font-size: 18px; margin: 5px 0 12px; font-weight: 700; color: var(--text); }
.wave-legend { display: flex; gap: 14px; font-size: 10px; color: var(--text-2); }
.legend-grain::before, .legend-scan::before { content: ''; display: inline-block; width: 7px; height: 7px; border-radius: 50%; margin-right: 5px; background: var(--cyan); box-shadow: 0 0 5px var(--cyan); }
.legend-scan::before { background: var(--purple); box-shadow: 0 0 5px var(--purple); }

/* ===== WAVEFORM ===== */
.wave-wrap { height: 173px; position: relative; overflow: hidden; border: 1px solid var(--border); border-radius: 6px; background: var(--bg-2); }
.wave-wrap canvas { width: 100%; height: 100%; display: block; }
#grain-overlay { position: absolute; inset: 0; pointer-events: none; }
.source-dropzone { position: absolute; inset: 0; display: grid; place-content: center; justify-items: center; gap: 8px; color: var(--text-2); background: var(--bg-2); text-align: center; cursor: pointer; z-index: 2; }
.source-dropzone strong { color: var(--text); font-size: 14px; }
.source-dropzone small { font-size: 10px; }
.source-dropzone .drop-icon { display: grid; place-items: center; width: 32px; height: 32px; border: 1px solid var(--cyan); border-radius: 50%; color: var(--cyan); font-size: 20px; }
.source-dropzone.dragover { border: 2px dashed var(--cyan); background: rgba(0, 229, 255, .06); color: var(--cyan); }
.source-dropzone[hidden], .wave-empty[hidden] { display: none; }
.wave-empty { position: absolute; inset: 0; display: grid; place-items: center; color: var(--text-2); font-size: 12px; }
.position-marker, .play-marker { position: absolute; top: 0; bottom: 0; width: 2px; left: 50%; background: var(--cyan); box-shadow: 0 0 6px var(--cyan); pointer-events: none; }
.play-marker { width: 1px; background: var(--text-2); left: 0; box-shadow: none; }
.scan-band { position: absolute; top: 0; bottom: 0; left: 45%; right: 45%; background: rgba(155, 92, 255, .14); border-left: 1px solid rgba(155, 92, 255, .5); border-right: 1px solid rgba(155, 92, 255, .5); pointer-events: none; }
.grain-marker { position: absolute; width: 4px; height: 4px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 4px var(--cyan); pointer-events: none; transform: translate(-50%, -50%); }
.wave-footer { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-size: 10px; color: var(--text-2); font-family: var(--mono); padding-top: 8px; }
.source-actions { display: flex; gap: 6px; margin-left: auto; }
.source-actions button { padding: 4px 8px; font-size: 10px; font-family: Inter, sans-serif; }

/* ===== TRANSPORT ===== */
.transport { margin-top: 12px; padding: 13px 19px; display: flex; justify-content: space-between; align-items: center; background: var(--panel-2); }
.transport-main, .meters, .action-row { display: flex; align-items: center; gap: 11px; }
.transport-button { padding: 9px 15px; font-size: 14px; text-transform: uppercase; letter-spacing: .03em; }
.primary, .transport-button.primary { background: var(--cyan); color: #04181c; border-color: var(--cyan); font-weight: 700; }
.primary:hover:not(:disabled), .transport-button.primary:hover:not(:disabled) { color: #04181c; filter: brightness(1.08); }
.transport-button.active { background: var(--purple); color: #fff; border-color: var(--purple); }
#play-time { font-family: var(--mono); font-size: 15px; color: var(--text-2); }
.mode-pill, .badge, .state-label { display: inline-flex; align-items: center; justify-content: center; line-height: 1; white-space: nowrap; font-size: 10px; border: 1px solid var(--border); border-radius: 999px; padding: 4px 8px; color: var(--text-2); text-transform: uppercase; letter-spacing: .04em; }
.transport .mode-pill, .transport .badge { font-size: 13px; padding: 6px 11px; }
.badge.safe { color: var(--green); border-color: var(--green); background: rgba(46, 230, 166, .08); }
.meter { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-2); }
.meter-track { width: 92px; height: 11px; border-radius: 3px; background: var(--bg-2); border: 1px solid var(--border); overflow: hidden; }
.meter-track i { display: block; height: 100%; width: 0%; background: linear-gradient(to right, var(--cyan), var(--green)); box-shadow: 0 0 4px var(--cyan); }
.meter output { font-family: var(--mono); color: var(--text-2); min-width: 55px; }

/* ===== CONTROL PANELS ===== */
.control-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 12px; }
.control-panel { padding: 16px 18px; }
.control-row { margin: 14px 0; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.control-row label, .select-row label { display: flex; justify-content: space-between; font-size: 11px; color: var(--text-2); margin-bottom: 7px; flex: 1 1 100%; text-transform: uppercase; letter-spacing: .03em; }
.control-row output { color: var(--text); font-family: var(--mono); text-transform: none; letter-spacing: 0; }
.value-input { flex: 0 0 auto; width: 68px; height: 26px; font-size: 11px; font-family: var(--mono); text-align: right; border: 1px solid var(--border); border-radius: 4px; padding: 2px 6px; background: var(--bg-2); color: var(--text); }
.value-input:focus-visible { outline: 2px solid var(--cyan); outline-offset: 1px; }
.value-input:disabled { opacity: .55; cursor: not-allowed; }
.param-bypass { flex: 0 0 auto; width: auto; height: 26px; padding: 0 10px; font-size: 10px; font-weight: 650; text-transform: uppercase; letter-spacing: .03em; border: 1px solid var(--border); border-radius: 4px; background: var(--bg-2); color: var(--text-2); cursor: pointer; }
.knob-row { flex-wrap: nowrap; }
.knob-row label { flex: 0 0 188px; margin-bottom: 0; display: block; font-size: 13px; font-weight: 650; white-space: nowrap; }
.knob-row output { display: none; }
.knob-row.master-gain-row { flex-wrap: wrap; }
.knob-row.master-gain-row label { flex: 1 1 100%; margin-bottom: 7px; }
.param-bypass.active { background: var(--orange); color: #2b1804; border-color: var(--orange); }
.param-bypass:focus-visible { outline: 2px solid var(--cyan); outline-offset: 1px; }

/* Slider (used for parameters without a knob, e.g. Duration) */
.control-row input[type=range] { flex: 1 1 auto; min-width: 0; width: 100%; height: 24px; appearance: none; -webkit-appearance: none; border: 0; outline: 0; padding: 0; background: transparent; box-shadow: none; cursor: pointer; }
.control-row input[type=range]::-webkit-slider-runnable-track { height: 3px; background: linear-gradient(to right, var(--cyan) 0%, var(--cyan) var(--range-progress, 0%), var(--border) var(--range-progress, 0%), var(--border) 100%); border: 0; border-radius: 2px; box-shadow: none; }
.control-row input[type=range]::-moz-range-track { height: 3px; background: linear-gradient(to right, var(--cyan) 0%, var(--cyan) var(--range-progress, 0%), var(--border) var(--range-progress, 0%), var(--border) 100%); border: 0; border-radius: 2px; box-shadow: none; }
.control-row input[type=range]::-webkit-slider-thumb { appearance: none; -webkit-appearance: none; width: 12px; height: 12px; margin-top: -4.5px; border: 2px solid var(--bg); border-radius: 50%; background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }
.control-row input[type=range]::-moz-range-thumb { width: 12px; height: 12px; border: 2px solid var(--bg); border-radius: 50%; background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }
.control-row input[type=range]:disabled::-webkit-slider-runnable-track, .control-row input[type=range]:disabled::-moz-range-track { background: var(--border); }
.control-row input[type=range]:disabled::-webkit-slider-thumb, .control-row input[type=range]:disabled::-moz-range-thumb { background: var(--text-2); box-shadow: none; }
.control-row input[type=range]:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

/* Range input proxied by a knob: kept in the DOM (focusable, keyboard-operable) but visually replaced */
.knob-native { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; pointer-events: none; }
.knob-row { gap: 12px; }
.knob { position: relative; flex: 0 0 auto; width: 48px; height: 48px; touch-action: none; cursor: ns-resize; }
.knob:focus-within .knob-dial circle.knob-track { stroke: var(--cyan); }
.knob-dial { width: 100%; height: 100%; transform: rotate(90deg); }
.knob-dial circle { fill: none; stroke-width: 3; }
.knob-track { stroke: var(--border); }
.knob-arc { stroke: var(--cyan); stroke-linecap: round; transition: stroke .15s; }
.knob[data-accent="purple"] .knob-arc { stroke: var(--purple); }
.knob[data-accent="orange"] .knob-arc { stroke: var(--orange); }
.knob-body { position: absolute; inset: 8px; border-radius: 50%; background: var(--panel-2); border: 1px solid var(--border); }
.knob.knob-large { width: 68px; height: 68px; }
.knob.knob-large .knob-body { inset: 10px; }
.knob-readout { font-family: var(--mono); font-size: 22px; font-weight: 700; color: var(--text); letter-spacing: -.01em; }
.unit-label { color: var(--text-2); font-size: 11px; text-transform: uppercase; letter-spacing: .03em; }
.knob.dragging .knob-body { border-color: var(--cyan); }
.knob[data-accent="purple"].dragging .knob-body { border-color: var(--purple); }
.knob[data-accent="orange"].dragging .knob-body { border-color: var(--orange); }
.knob.is-disabled { cursor: not-allowed; opacity: .55; }
.knob.is-disabled .knob-track { stroke: var(--text-2); }
.knob.is-disabled .knob-arc { stroke: var(--text-2); }
.knob.is-disabled .knob-body { border-color: var(--border); }

.select-row { margin: 12px 0; }
.select-row select, .seed-row input { width: 100%; height: 34px; background: var(--bg-2); border: 1px solid var(--border); color: var(--text); border-radius: 5px; padding: 6px 8px; }
.seed-row { display: grid; grid-template-columns: 48px 1fr auto; gap: 7px; align-items: center; font-size: 11px; margin-top: 26px; }
.control-grid .control-panel:nth-child(1) .control-row { margin: 34px 0; }
.control-grid .control-panel:nth-child(1) .knob { width: 76px; height: 76px; }
.control-grid .control-panel:nth-child(1) .knob-body { inset: 13px; }
.seed-row input { font-family: var(--mono); }
.small-button, .icon-button { padding: 7px 9px; font-size: 10px; }
.level-summary, .diagnostic-grid, .export-results { display: grid; grid-template-columns: repeat(2, 1fr); gap: 7px; }
.control-grid .control-panel:nth-child(3) .select-row,
.control-grid .control-panel:nth-child(3) .control-row { margin: 22px 0; }
.control-grid .control-panel:nth-child(3) .level-summary { margin-top: 28px; }
.level-summary > div, .diagnostic-grid > div, .export-results > div { background: var(--bg-2); border: 1px solid var(--border); border-radius: 6px; padding: 8px; }
.level-summary span, .diagnostic-grid span, .export-results span { display: block; color: var(--text-2); font-size: 10px; text-transform: uppercase; letter-spacing: .03em; }
.level-summary strong, .diagnostic-grid strong, .export-results strong { display: block; color: var(--text); font-size: 12px; font-family: var(--mono); margin-top: 4px; }

.bottom-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 12px; margin-top: 12px; }
.diagnostics, .export-panel { padding: 16px 18px; }
.diagnostic-grid { grid-template-columns: repeat(4, 1fr); margin: 7px 0; }
.dev-diagnostic { display: none !important; }
.warning { border-left: 3px solid var(--orange); background: rgba(255, 154, 60, .08); color: var(--orange); padding: 9px 11px; font-size: 11px; margin: 10px 0; border-radius: 0 6px 6px 0; }
.action-row { flex-wrap: wrap; }
.wide { width: 100%; margin: 10px 0; }
.check-row { font-size: 11px; color: var(--text-2); display: flex; gap: 7px; align-items: center; }
.progress { height: 3px; background: var(--border); border-radius: 9px; overflow: hidden; }
.progress i { display: block; width: 35%; height: 100%; background: var(--purple); animation: progress 1.1s infinite ease-in-out; }
@keyframes progress { 50% { transform: translateX(180%); } }
.export-results { margin-top: 8px; }
.export-results > div:last-child { grid-column: span 2; }
.export-panel a:not([hidden]) { display: inline-block; color: var(--purple); margin: 8px 0; font-size: 11px; }
.export-panel .primary.wide { background: var(--purple); border-color: var(--purple); color: #fff; }

@media (max-width: 1200px) { .workspace { padding: 18px; } .control-grid { grid-template-columns: 1fr 1fr; } .control-grid .control-panel:last-child { grid-column: span 2; } .bottom-grid { grid-template-columns: 1fr; } .header-meta { gap: 8px; } }