:root {
  color-scheme: dark;
  font-family: Inter, "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  background: #0b100d;
  color: #edf4ed;
  --surface: #111713;
  --surface-raised: #17201a;
  --line: #344039;
  --line-strong: #516159;
  --muted: #9aa9a0;
  --green: #91d5a4;
  --cyan: #72c4d4;
  --orange: #f3a866;
  --danger: #ff8f87;
}

* { box-sizing: border-box; }
body { min-width: 20rem; min-height: 100vh; margin: 0; background: #0b100d; }
button, input, select { font: inherit; }
button, select, input[type="checkbox"] { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible, canvas:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }
button:disabled, input:disabled, select:disabled { cursor: not-allowed; opacity: .45; }

.app-header { min-height: 4.5rem; display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 2rem; padding: .8rem clamp(1rem, 3vw, 2.4rem); border-bottom: 1px solid var(--line); background: rgba(11, 16, 13, .96); position: sticky; top: 0; z-index: 20; }
.brand { display: flex; align-items: center; gap: .8rem; font: 600 1.15rem Georgia, serif; letter-spacing: -.02em; }
.brand-mark { width: 2rem; height: 2rem; display: grid; place-items: center; border: 1px solid var(--green); color: var(--green); font: 750 .72rem Inter, sans-serif; letter-spacing: .08em; }
.generation-state { display: flex; align-items: center; gap: .55rem; color: #c5d0c8; font-size: .875rem; }
.status-dot { width: .58rem; height: .58rem; border-radius: 50%; background: #d7b95f; }
.generation-state:has(#status[data-state="generated"]) .status-dot { background: var(--green); box-shadow: 0 0 .8rem var(--green); }
.generation-state:has(#status[data-state="invalid"]), .generation-state:has(#status[data-state="error"]) { color: #ffd0cc; }
.generation-state:has(#status[data-state="invalid"]) .status-dot, .generation-state:has(#status[data-state="error"]) .status-dot { background: var(--danger); }
.header-actions { display: flex; align-items: center; gap: .45rem; }
.primary-action, .secondary-action, .stop-action { min-height: 2.7rem; border-radius: .25rem; padding: .65rem 1rem; font-weight: 750; }
.primary-action { border: 0; background: var(--green); color: #0b2413; }
.secondary-action { width: 10rem; }
.secondary-action, .stop-action { border: 1px solid var(--line-strong); background: var(--surface); color: #d9e5dc; }
.secondary-action:hover, .stop-action:hover { border-color: var(--green); color: var(--green); }

.app-shell { width: min(100%, 100rem); margin: 0 auto; padding: 1.25rem clamp(1rem, 2.5vw, 2.5rem) 2.5rem; }
.settings-strip { display: grid; grid-template-columns: minmax(10rem, 1.3fr) repeat(5, minmax(7.5rem, 1fr)); gap: 1rem; align-items: end; padding-bottom: 1.25rem; }
.fracture-panel { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .75rem; align-items: stretch; padding: .85rem; margin-bottom: 1rem; border: 1px solid #4d3c30; background: linear-gradient(135deg, #17150f, var(--surface)); }
.fracture-panel[hidden] { display: none; }
.fracture-heading { grid-column: 1 / -1; padding-right: .5rem; }
.fracture-heading h2 { margin: .2rem 0 .4rem; font: 500 1.25rem Georgia, serif; }
.fracture-heading p:last-child { margin: 0; color: var(--muted); font-size: .75rem; line-height: 1.45; }
.fracture-control { min-width: 0; padding: .6rem; border: 1px solid var(--line); background: rgba(11, 16, 13, .65); }
.fracture-control-title { display: flex; justify-content: space-between; gap: .5rem; margin-bottom: .55rem; color: #dce6de; font-size: .78rem; }
.fracture-control-title span, .fracture-control > small { color: var(--muted); font-size: .68rem; }
.fracture-control > small { display: block; margin-top: .35rem; line-height: 1.35; }
.fracture-slider-row { display: grid; grid-template-columns: 2.2rem minmax(4.5rem, 1fr) 4.5rem 1.2rem; align-items: center; gap: .35rem; margin-top: .35rem; font-size: .7rem; }
.fracture-slider-row.single-value { grid-template-columns: minmax(5rem, 1fr) 4.5rem 1.2rem; }
.fracture-slider-row input[type="range"] { width: 100%; accent-color: var(--orange); }
.fracture-slider-row input[type="number"] { min-height: 1.9rem; padding: .25rem .35rem; font-size: .75rem; }
.fracture-actions { grid-column: 1 / -1; display: flex; align-items: center; justify-content: flex-end; gap: .75rem; color: var(--muted); font-size: .72rem; font-variant-numeric: tabular-nums; }
.fracture-result { margin: 1rem 0 0; border: 1px solid #4d3c30; background: var(--surface); }
.fracture-result[hidden] { display: none; }
.fracture-result > summary { cursor: pointer; padding: .65rem .85rem; color: #e6d8ca; font-size: .82rem; }
.fracture-result table { min-width: 28rem; }
.preset-strip { display: grid; grid-template-columns: minmax(10rem, 1.2fr) repeat(3, minmax(8rem, 1fr)) auto; gap: .8rem; align-items: end; padding: .8rem; margin-bottom: 1rem; border: 1px solid var(--line); background: var(--surface); }
.preset-strip h2 { margin: .2rem 0 0; font: 500 1.25rem Georgia, serif; }
.preset-strip input[type="text"] { width: 100%; min-height: 2.55rem; border: 1px solid var(--line); border-radius: .22rem; background: #0b100d; color: #edf4ed; padding: .52rem .65rem; font-variant-numeric: tabular-nums; }
.preset-checkbox { min-height: 2.55rem; display: flex; align-items: center; gap: .5rem; white-space: nowrap; }
.preset-checkbox input { accent-color: var(--green); }
.preset-actions { display: flex; gap: .4rem; }
.preset-state { grid-column: 2 / -1; margin: 0; color: var(--muted); font-size: .75rem; }
.preset-state[data-state="error"] { color: var(--danger); }
.preset-state[data-state="custom"] { color: #ead993; }
.section-heading h1, .panel-heading h2 { margin: .2rem 0 0; font: 500 1.55rem Georgia, serif; letter-spacing: -.02em; }
.eyebrow { margin: 0; color: var(--green); font-size: .75rem; line-height: 1.3; letter-spacing: .14em; font-weight: 750; }
label { display: grid; gap: .45rem; color: #c8d2cb; font-size: .875rem; }
label small { color: var(--muted); font-size: .75rem; line-height: 1.35; }
.field { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: .45rem; color: var(--muted); }
input[type="number"], select { width: 100%; min-height: 2.55rem; border: 1px solid var(--line); border-radius: .22rem; background: var(--surface); color: #edf4ed; padding: .52rem .65rem; font-variant-numeric: tabular-nums; }
.notice { min-height: 2.8rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .65rem .9rem; border: 1px solid var(--line); border-left: 3px solid #d7b95f; color: #c7d2ca; background: var(--surface); font-size: .875rem; }
.notice[data-state="generated"] { border-left-color: var(--green); }
.notice[data-state="invalid"], .notice[data-state="error"] { border-left-color: var(--danger); color: #ffd0cc; }
#generated-summary { color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }

.effects-panel { margin-top: 1rem; border: 1px solid var(--line); background: var(--surface); }
.effects-layout { display: grid; grid-template-columns: minmax(24rem, 1.25fr) minmax(31rem, 1fr); min-height: 18rem; }
.eq-response-panel { min-width: 0; border-right: 1px solid var(--line); background: #0b100d; }
#eq-response { display: block; width: 100%; height: 16rem; }
.eq-legend { display: flex; flex-wrap: wrap; gap: .45rem 1rem; padding: .45rem 1rem .7rem; color: var(--muted); font-size: .7rem; }
.eq-legend span { display: flex; align-items: center; gap: .35rem; }
.eq-legend i { width: 1.2rem; border-top: 2px solid; }
.eq-legend .eq-band-1 { border-color: var(--cyan); }
.eq-legend .eq-band-2 { border-color: var(--orange); }
.eq-legend .eq-band-3 { border-color: #d99be8; }
.eq-legend .eq-band-4 { border-color: var(--green); }
.eq-legend .eq-total { border-color: #f4f8f5; border-width: 3px; }
.effect-controls { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.eq-band { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .55rem; padding: .7rem; border-bottom: 1px solid var(--line); }
.eq-band:nth-child(odd) { border-right: 1px solid var(--line); }
.effect-toggle { display: flex; grid-column: 1 / -1; grid-template-columns: auto 1fr; align-items: center; gap: .5rem; font-weight: 700; }
.effect-toggle input { accent-color: var(--green); }
.master-bypass { grid-column: auto; }
.effects-summary { cursor: pointer; list-style: none; user-select: none; }
.effects-summary::-webkit-details-marker { display: none; }
.effects-panel:not([open]) > .effects-summary { border-bottom: 0; }
.effects-summary:focus-visible { outline: 2px solid var(--green); outline-offset: -3px; }
.effects-chevron { color: var(--muted); font-size: .8rem; }
.effects-panel[open] > .effects-summary .effects-chevron { transform: rotate(90deg); }
.effects-toolbar { display: flex; justify-content: flex-end; padding: .75rem 1rem; border-bottom: 1px solid var(--line); }
.limiter-strip { display: grid; grid-template-columns: auto repeat(3, minmax(9rem, 1fr)) minmax(18rem, 1.4fr); align-items: end; gap: .75rem; padding: .8rem 1rem; border-top: 1px solid var(--line); }
.limiter-strip .effect-toggle { grid-column: auto; min-height: 2.55rem; }
.effect-report { margin: 0; align-self: center; color: var(--muted); font-size: .75rem; font-variant-numeric: tabular-nums; }

.waveform-panel { margin-top: 1rem; border: 1px solid var(--line); background: var(--surface); }
.waveform-state { padding: .3rem .5rem; border: 1px solid var(--line-strong); color: #cbd6ce; font-size: .72rem; letter-spacing: .04em; }
.waveform-state[data-stale="true"] { border-color: #d7b95f; color: #ead993; }
.waveform-canvas-wrap { position: relative; height: clamp(9rem, 16vw, 13rem); background: #0b100d; overflow: hidden; }
#waveform { display: block; width: 100%; height: 100%; }
.waveform-axis { position: absolute; color: #78877e; background: rgba(11, 16, 13, .75); padding: .1rem .25rem; font-size: .65rem; pointer-events: none; }
.waveform-positive { left: .35rem; top: .3rem; }
.waveform-zero { left: .35rem; top: 50%; transform: translateY(-50%); }
.waveform-negative { left: .35rem; bottom: .3rem; }
.waveform-start { left: 2.2rem; bottom: .3rem; }
.waveform-end { right: .35rem; bottom: .3rem; }
.waveform-empty { position: absolute; inset: 0; display: grid; place-items: center; margin: 0; padding: 1rem; color: var(--muted); font-size: .82rem; text-align: center; }
.waveform-empty[hidden] { display: none; }
.waveform-meta { min-height: 2.5rem; display: flex; align-items: center; gap: 1.25rem; padding: .55rem 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .75rem; font-variant-numeric: tabular-nums; }
.waveform-meta span:last-child { margin-left: auto; color: #cbd6ce; }
.waveform-meta [data-state="playing"] { color: var(--green); }
.wav-export { display: flex; flex-wrap: wrap; align-items: end; gap: .75rem 1rem; padding: .75rem 1rem; border-top: 1px solid var(--line); }
.wav-export label { min-width: 10rem; }
.wav-export p { margin: 0; align-self: center; color: var(--muted); font-size: .8rem; overflow-wrap: anywhere; }
#wav-status { flex-basis: 100%; }
#wav-status:empty { display: none; }
.waveform-meta [data-state="error"] { color: var(--danger); }

.editor-grid { display: grid; grid-template-columns: minmax(30rem, 1fr) minmax(38rem, 1.15fr); gap: 1rem; margin-top: 1rem; align-items: start; }
.visual-column, .partials-panel, .pen-panel, .frequency-panel { border: 1px solid var(--line); background: var(--surface); }
.controls-column { min-width: 0; display: flex; flex-direction: column; gap: .7rem; }
.panel-heading { min-height: 4.2rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .9rem 1rem; border-bottom: 1px solid var(--line); }
.panel-heading.compact { min-height: 3.8rem; }
.controls-column .panel-heading.compact { min-height: 3.25rem; padding: .55rem .7rem; }
.controls-column .panel-heading h2 { font-size: 1.25rem; }
.quiet-button { min-height: 2.25rem; border: 1px solid var(--line-strong); border-radius: .2rem; background: transparent; color: #d4ddd6; padding: .45rem .7rem; font-size: .8rem; }
.quiet-button:hover { border-color: var(--green); color: var(--green); }

.visualizer { height: clamp(19rem, 37vw, 31rem); position: relative; overflow: hidden; background: #0b100d; }
.visualizer canvas { display: block; width: 100%; height: 100%; touch-action: none; cursor: grab; }
.visualizer canvas:active { cursor: grabbing; }
.visualizer.is-unavailable { display: grid; place-items: center; padding: 2rem; }
.visualizer-fallback { max-width: 34rem; color: #ffd0cc; line-height: 1.6; }
.axis-label { position: absolute; z-index: 2; padding: .2rem .35rem; background: rgba(11, 16, 13, .72); color: #bbc7bf; font-size: .75rem; pointer-events: none; }
.axis-ratio { left: 1rem; bottom: 1rem; color: var(--cyan); }
.axis-amplitude { left: 1rem; top: 1rem; color: var(--green); }
.axis-time { right: 1rem; bottom: 1rem; color: var(--orange); }
.legend { position: absolute; right: 1rem; top: 1rem; z-index: 2; display: grid; gap: .35rem; padding: .45rem .55rem; background: rgba(11, 16, 13, .76); color: #bbc7bf; font-size: .72rem; pointer-events: none; }
.legend span { display: flex; align-items: center; gap: .45rem; }
.legend i { width: 1.4rem; height: 0; border-top: 2px solid var(--cyan); }
.legend-inharmonic { border-top: 2px dashed var(--orange) !important; }

.frequency-panel { min-width: 0; }
.frequency-status { display: grid; justify-items: end; gap: .15rem; }
.frequency-readout { margin: 0; color: #cbd6ce; font-size: .78rem; font-variant-numeric: tabular-nums; }
.frequency-status small { color: var(--muted); font-size: .72rem; font-variant-numeric: tabular-nums; }
#frequency-editor { display: block; width: 100%; height: 6.5rem; touch-action: none; cursor: pointer; }
#frequency-editor[data-movable="true"] { cursor: grab; }
#frequency-editor[data-dragging="true"] { cursor: ew-resize; }
.frequency-legend { display: flex; gap: 1rem; padding: .45rem .85rem .65rem; color: var(--muted); font-size: .72rem; }
.frequency-legend span { display: flex; align-items: center; gap: .4rem; }
.frequency-legend i { width: .65rem; height: .65rem; display: inline-block; }
.frequency-harmonic { border: 2px solid var(--cyan); border-radius: 50%; }
.frequency-inharmonic { background: var(--orange); transform: rotate(45deg) scale(.8); }
.frequency-scroll { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: .65rem; padding: 0 .7rem .55rem; color: var(--muted); font-size: .72rem; }
.frequency-scroll input { width: 100%; accent-color: var(--green); }
.pen-panel { min-width: 0; }
#amplitude-editor, #decay-editor { display: block; width: 100%; height: 7rem; touch-action: none; cursor: crosshair; }
.decay-scale-box { display: grid; grid-template-columns: minmax(7rem, 1fr) 4.8rem auto auto; align-items: center; gap: .4rem; margin: .45rem .65rem 0; padding: .5rem; border: 1px dashed var(--line-strong); background: #0d1410; }
.decay-scale-box.is-scaling { border-style: solid; border-color: var(--orange); box-shadow: inset 0 0 0 1px rgba(243, 168, 102, .12); }
.decay-scale-heading { grid-column: 1 / -1; display: flex; justify-content: space-between; color: #d9e3dc; font-size: .72rem; }
.decay-scale-heading span { color: var(--muted); }
.decay-scale-box > input[type="range"] { width: 100%; accent-color: var(--orange); }
.decay-scale-value { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: .25rem; }
.decay-scale-value input { min-height: 2.1rem; padding: .3rem .4rem; }
.decay-scale-box .quiet-button { min-height: 2.1rem; padding: .3rem .5rem; }
.pen-scale { display: grid; grid-template-columns: 1fr auto 1fr; padding: .35rem .7rem .5rem; color: var(--muted); font-size: .7rem; }
.pen-scale span:last-child { text-align: right; }

.partials-panel { min-width: 0; display: flex; flex-direction: column; }
.add-actions { display: flex; gap: .4rem; }
.table-wrap { overflow: auto; max-height: 22rem; }
table { width: 100%; min-width: 36rem; border-collapse: collapse; font-size: .75rem; }
th { position: sticky; top: 0; z-index: 2; background: #161e19; color: var(--muted); font-size: .72rem; font-weight: 650; text-align: left; }
th, td { padding: .3rem .3rem; border-bottom: 1px solid #29342d; vertical-align: middle; }
tbody tr { border-left: 3px solid transparent; }
tbody tr.is-selected { background: #1d2921; border-left-color: var(--green); }
tbody tr.has-error { background: #2a1918; border-left-color: var(--danger); }
tbody tr.is-nyquist-ignored { background: #2b2418; border-left-color: #d7b95f; }
td input[type="number"], td select { min-width: 4.3rem; min-height: 1.85rem; padding: .24rem .35rem; }
.frequency-control { display: grid; grid-template-columns: minmax(4.2rem, 1fr) auto; align-items: center; gap: .35rem; white-space: nowrap; }
td small { color: var(--muted); font-size: .68rem; font-variant-numeric: tabular-nums; }
.row-selector, .delete-button { width: 1.65rem; height: 1.65rem; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: #cbd6ce; font-size: .7rem; }
.row-selector[aria-pressed="true"] { border-color: var(--green); background: var(--green); color: #102016; }
.delete-button { border-radius: .2rem; font-size: 1rem; }
.kind-badge { display: inline-block; min-width: 4.3rem; padding: .3rem .35rem; border: 1px solid var(--line); color: var(--cyan); }
.kind-badge.fundamental::before { content: "● "; }
.table-help { margin: auto 0 0; padding: .45rem .7rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .7rem; line-height: 1.4; }

@media (max-width: 1100px) {
  .settings-strip { grid-template-columns: repeat(4, 1fr); }
  .section-heading { grid-column: 1 / -1; }
  .fracture-panel { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fracture-heading, .fracture-actions { grid-column: 1 / -1; }
  .preset-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .preset-state { grid-column: 1 / -1; }
  .editor-grid { grid-template-columns: 1fr; }
  .table-wrap { max-height: 26rem; }
  .effects-layout { grid-template-columns: 1fr; }
  .eq-response-panel { border-right: 0; border-bottom: 1px solid var(--line); }
  .limiter-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .effect-report { grid-column: 1 / -1; }
}

@media (max-width: 700px) {
  .app-header { grid-template-columns: 1fr; gap: .7rem; }
  .generation-state { grid-column: 1; grid-row: 2; }
  .header-actions { grid-column: 1; grid-row: 3; display: grid; grid-template-columns: repeat(3, 1fr); }
  .primary-action, .secondary-action, .stop-action { padding-inline: .65rem; }
  .secondary-action { width: 100%; min-width: 0; }
  .settings-strip { grid-template-columns: 1fr 1fr; }
  .fracture-panel { grid-template-columns: 1fr; }
  .fracture-heading, .fracture-actions { grid-column: 1; }
  .preset-strip { grid-template-columns: 1fr; }
  .preset-state { grid-column: 1; }
  .notice { align-items: flex-start; flex-direction: column; }
  #generated-summary { white-space: normal; }
  .editor-grid { display: block; }
  .controls-column { margin-top: 1rem; }
  .decay-scale-box { grid-template-columns: minmax(0, 1fr) 5rem; }
  .panel-heading { align-items: flex-start; }
  .add-actions { flex-direction: column; }
  .visualizer { height: 21rem; }
  .waveform-meta { align-items: flex-start; flex-direction: column; gap: .25rem; }
  .waveform-meta span:last-child { margin-left: 0; }
  .effect-controls, .limiter-strip { grid-template-columns: 1fr; }
  .eq-band:nth-child(odd) { border-right: 0; }
  .limiter-strip .effect-toggle { grid-column: 1; }
}

#eq-response { touch-action: none; }
.effect-slider { width: 100%; min-width: 0; min-height: 24px; padding: 0; accent-color: var(--green); cursor: pointer; }
.eq-gesture-help { margin: .5rem 0; color: var(--muted); font-size: .72rem; line-height: 1.5; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}