:root {
  --bg: #203038;
  --surface: #09111b;
  --surface-2: #0d1622;
  --surface-3: #101b28;
  --surface-4: #0b131d;
  --panel-soft: rgba(23, 34, 49, 0.82);
  --line: #203246;
  --line-strong: #28425b;
  --text: #ecf1fb;
  --text-dim: #98a5b8;
  --accent: #73d8d4;
  --accent-2: #6ca8f2;
  --warm: #9d6b57;
  --danger: #e28383;
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 14px;
  --shadow: 0 30px 100px rgba(0, 0, 0, 0.32);
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(115, 216, 212, 0.12), transparent 24%),
    linear-gradient(180deg, #203038 0%, #18242c 100%);
  color: var(--text);
  font-family: var(--sans);
}

button,
input,
select,
textarea,
audio {
  font: inherit;
}

.studio-shell {
  width: min(1480px, calc(100% - 20px));
  margin: 0 auto;
  padding: 10px 0 18px;
}

.topbar,
.workspace-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  min-height: 0;
}

.topbar-copy {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.brand-led {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 22px rgba(115, 216, 212, 0.78);
}

.eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.panel-top h2,
.stage-header h2,
.block-heading h3 {
  margin: 0;
  line-height: 1;
}

.lede,
.topbar-summary,
.hint,
.note-list p,
.text-output,
.value-readout {
  color: var(--text-dim);
}

.topbar-summary {
  margin: 0;
  min-width: 0;
  font-size: 0.96rem;
  line-height: 1.5;
}

.topbar-side {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: 0 0 auto;
  gap: 10px;
}

.utility-select {
  min-height: 38px;
  min-width: 84px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-4);
  color: var(--text);
}

.meter-card,
.stack-block,
.result-block,
.chart-frame {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.meter-card {
  min-width: 0;
  padding: 12px 14px;
}

.meter-label,
.stat-label,
.measurement-label,
.value-readout {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.meter-card strong,
.stats-row strong {
  display: block;
  margin-top: 4px;
  font-size: 1.3rem;
}

.chart-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(115, 216, 212, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(115, 216, 212, 0.055) 1px, transparent 1px);
  background-size: 26px 26px;
}

.studio-layout {
  margin-top: 10px;
  display: grid;
  grid-template-columns: minmax(330px, 420px) minmax(0, 1fr);
  gap: 10px;
}

.workspace-panel {
  padding: 16px;
}

.left-rail,
.results-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.panel-top,
.stage-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.panel-top h2,
.stage-header h2 {
  font-size: clamp(1.32rem, 2.2vw, 1.9rem);
}

.mode-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  min-width: 160px;
  padding: 4px;
  border-radius: 999px;
  background: var(--surface-4);
  border: 1px solid var(--line);
}

.stack-block,
.result-block,
.chart-frame {
  padding: 14px;
}

.emphasis-block {
  background:
    linear-gradient(180deg, rgba(12, 21, 33, 0.98), rgba(10, 16, 25, 0.98)),
    radial-gradient(circle at top right, rgba(115, 216, 212, 0.08), transparent 36%);
  border-color: var(--line-strong);
}

.block-heading {
  margin-bottom: 10px;
}

.block-heading h3 {
  margin-top: 4px;
  font-size: 1.02rem;
}

.mode-button,
.primary-action,
.secondary-action {
  border: none;
  cursor: pointer;
  transition: transform 0.16s ease, opacity 0.16s ease, background-color 0.16s ease;
}

.mode-button {
  min-height: 38px;
  border-radius: 999px;
  background: transparent;
  color: var(--text-dim);
}

.mode-button.active {
  background: rgba(115, 216, 212, 0.12);
  color: var(--text);
}

.control-grid,
.action-grid,
.preview-controls,
.output-grid {
  display: grid;
  gap: 10px;
}

.control-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.action-grid.two-up {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.output-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.control-group {
  margin-top: 10px;
}

.control-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--text);
}

select,
input[type="file"],
input[type="text"],
textarea {
  width: 100%;
  min-height: 44px;
  padding: 11px 13px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface-4);
  color: var(--text);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

textarea {
  resize: vertical;
}

.primary-action,
.secondary-action {
  min-height: 44px;
  padding: 0 16px;
  border-radius: 12px;
}

.primary-action {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b1620;
  font-weight: 700;
}

.secondary-action {
  background: var(--surface-4);
  border: 1px solid var(--line);
  color: var(--text);
}

.hint {
  margin: 8px 0 0;
  font-size: 12px;
  line-height: 1.6;
}

.value-readout {
  margin-top: 6px;
}

.hidden {
  display: none !important;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  min-width: min(100%, 440px);
}

.stats-row > div,
.eq-list div,
.note-list p,
.quick-preset-board article,
.measurement-summary {
  background: var(--surface-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.stats-row > div {
  padding: 12px;
}

.measurement-summary {
  margin-top: 10px;
  padding: 12px;
}

.measurement-summary strong {
  display: block;
  margin-top: 6px;
  font-size: 0.95rem;
}

.chart-stage {
  margin-top: 10px;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--text-dim);
  font-size: 12px;
}

.legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 999px;
}

.legend-swatch.measured {
  background: #ff9d6c;
}

.legend-swatch.target {
  background: #7de2d1;
}

.legend-swatch.corrected {
  background: #8aa7ff;
}

.chart-frame {
  position: relative;
  min-height: 340px;
  overflow: hidden;
}

#response-chart {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  background: transparent;
}

.results-stack {
  margin-top: 10px;
}

.eq-list,
.note-list,
.quick-preset-board {
  display: grid;
  gap: 8px;
}

.eq-list div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  font-family: var(--mono);
}

.eq-list strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.94rem;
}

.eq-list small {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 11px;
}

.eq-list span:last-child {
  font-size: 1rem;
  white-space: nowrap;
}

.boost {
  color: var(--accent);
}

.cut {
  color: var(--danger);
}

.note-list p {
  margin: 0;
  padding: 12px;
  line-height: 1.65;
}

.text-output {
  min-height: 180px;
  margin-top: 10px;
  font-family: var(--mono);
  line-height: 1.6;
}

.preview-grid {
  grid-template-columns: minmax(0, 1fr) max-content;
  align-items: end;
}

#preview-audio {
  width: 100%;
  margin-top: 12px;
}

.preview-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content;
  gap: 10px;
  align-items: end;
}

.preview-toggle {
  min-width: 170px;
}

.preview-actions {
  display: grid;
  gap: 10px;
  justify-items: end;
}

.demo-picker {
  width: 100%;
  max-width: 240px;
}

.preview-mode-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  padding: 4px;
  min-width: 180px;
  border-radius: 999px;
  background: var(--surface-4);
  border: 1px solid var(--line);
}

.preview-mode-toggle .secondary-action {
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  background: transparent;
  border: none;
  color: var(--text-dim);
}

.preview-mode-toggle .secondary-action.active {
  background: rgba(115, 216, 212, 0.12);
  color: var(--text);
}

.quick-preset-board {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.quick-preset-board article {
  padding: 12px;
}

.quick-label {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.quick-preset-board p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.55;
}

button:hover {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.5;
  cursor: default;
  transform: none;
}

@media (max-width: 1160px) {
  .studio-layout,
  .output-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-copy,
  .topbar-side {
    justify-content: flex-start;
  }
}

@media (max-width: 720px) {
  .studio-shell {
    width: min(100% - 10px, 1480px);
    padding: 6px 0 12px;
  }

  .topbar,
  .workspace-panel {
    border-radius: 20px;
  }

  .topbar,
  .workspace-panel,
  .meter-card,
  .stack-block,
  .result-block,
  .chart-frame {
    padding: 12px;
  }

  .panel-top,
  .stage-header,
  .control-grid,
  .action-grid.two-up,
  .stats-row,
  .preview-controls,
  .quick-preset-board {
    grid-template-columns: 1fr;
  }

  .panel-top,
  .stage-header {
    align-items: stretch;
  }

  .topbar h1 {
    font-size: inherit;
  }

  .stats-row {
    min-width: 0;
  }

  .topbar-copy,
  .topbar-side {
    align-items: flex-start;
    flex-direction: column;
  }

  .chart-legend {
    flex-direction: column;
  }

  .preview-actions,
  .preview-mode-toggle {
    width: 100%;
    justify-items: stretch;
  }

  .demo-picker {
    max-width: none;
  }

  .preview-toggle,
  .mode-toggle {
    min-width: 0;
    width: 100%;
  }

  .chart-frame {
    min-height: 250px;
  }
}