/* Melody Generator - piano-roll-first progression lab */

.mg-hero {
  background: var(--hero-bg);
  color: var(--hero-ink);
  padding: 56px 0 50px;
}
.mg-hero-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.mg-hero-title {
  font-size: 38px;
  font-weight: 300;
  letter-spacing: 0;
  margin: 0 0 10px;
}
.mg-hero-sub {
  color: var(--hero-ink-dim);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.55;
  margin: 0;
  max-width: 700px;
}

.mg-page {
  max-width: 1360px;
  margin: 0 auto;
  padding: 42px var(--gutter) 72px;
}
.mg-workbench {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 22px;
  align-items: start;
}
.mg-panel {
  min-width: 0;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
}
.mg-main {
  min-width: 0;
  padding: 24px;
}
.mg-side {
  padding: 20px;
  position: sticky;
  top: 92px;
}
.mg-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.mg-panel-title {
  color: var(--ink);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: 0;
  margin: 0 0 6px;
}
.mg-panel-sub {
  color: var(--ink-dim);
  font-size: 13px;
  line-height: 1.45;
  margin: 0;
}
.mg-transport {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-shrink: 0;
}
.mg-icon-btn,
.mg-play {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-dim);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color 0.18s, border-color 0.18s, background 0.18s, transform 0.18s;
}
.mg-icon-btn {
  width: 34px;
  height: 34px;
  border-radius: 999px;
}
.mg-icon-btn svg {
  width: 15px;
  height: 15px;
}
.mg-icon-btn:hover,
.mg-icon-btn.is-active {
  color: var(--ink);
  border-color: var(--line-bright);
}
.mg-play {
  width: 48px;
  height: 40px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.mg-play svg {
  width: 14px;
  height: 14px;
}
.mg-play-off { display: none; }
.mg-play.is-playing .mg-play-on { display: none; }
.mg-play.is-playing .mg-play-off { display: inline-flex; }
.mg-play:active,
.mg-icon-btn:active,
.mg-btn:active {
  transform: scale(0.97);
}

.mg-score-controls {
  display: grid;
  grid-template-columns: repeat(5, minmax(88px, 1fr));
  gap: 10px;
  margin: 18px 0 0;
}
.mg-modes {
  display: grid;
  grid-template-columns: repeat(7, minmax(96px, 1fr));
  gap: 8px;
  margin: 18px 0 18px;
}
.mg-mode {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-dim);
  border-radius: 8px;
  padding: 11px 10px 10px;
  cursor: pointer;
  text-align: left;
  transition: background 0.18s, border-color 0.18s, color 0.18s;
}
.mg-mode:hover {
  border-color: var(--line-bright);
  color: var(--ink);
}
.mg-mode.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}
.mg-mode-root {
  display: block;
  font-size: 22px;
  line-height: 1;
  font-weight: 500;
  letter-spacing: 0;
}
.mg-mode-name {
  display: block;
  margin-top: 5px;
  font-size: 10px;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  opacity: 0.76;
}
.mg-mode-quality {
  display: block;
  margin-top: 8px;
  font-size: 11px;
  line-height: 1.2;
  opacity: 0.72;
}

.mg-score-wrap {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg-card) 84%, var(--bg) 16%);
  border-radius: 8px;
  padding: 8px;
  overflow-x: auto;
  max-width: 100%;
}
.mg-score {
  display: block;
  width: 100%;
  min-width: 940px;
  min-height: 520px;
  height: auto;
}
.mg-score-bg {
  fill: transparent;
}
.mg-roll-grid {
  stroke: var(--line);
  stroke-width: 1;
}
.mg-roll-grid-beat {
  stroke: var(--line-bright);
  stroke-width: 1.2;
}
.mg-roll-barline {
  stroke: var(--ink);
  stroke-width: 1.8;
}
.mg-roll-final {
  stroke-width: 3;
}
.mg-bar-number,
.mg-roll-chord,
.mg-roll-meter {
  fill: var(--ink-dim);
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0;
}
.mg-roll-chord {
  fill: var(--ink);
  font-size: 13px;
}
.mg-roll-frame {
  fill: transparent;
  stroke: var(--line);
  stroke-width: 1;
}
.mg-roll-row {
  fill: color-mix(in srgb, var(--ink) 3%, transparent);
}
.mg-roll-row.is-alt {
  fill: color-mix(in srgb, var(--ink) 6%, transparent);
}
.mg-roll-note-label {
  fill: var(--ink-dim);
  font: 600 11px/1 var(--font-mono);
  text-anchor: end;
}
.mg-roll-note {
  fill: color-mix(in srgb, var(--ink) 62%, transparent);
  transition: fill 0.12s;
}
.mg-roll-note.is-active {
  fill: var(--accent, var(--ink));
}
.mg-playhead-roll {
  fill: color-mix(in srgb, var(--ink) 14%, transparent);
  pointer-events: none;
}

.mg-action-row,
.mg-export-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}
.mg-btn {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font: 500 13px/1 var(--font);
  letter-spacing: 0.01em;
  padding: 11px 17px;
  cursor: pointer;
  min-height: 38px;
  transition: border-color 0.18s, color 0.18s, background 0.18s, transform 0.18s;
}
.mg-btn:hover {
  border-color: var(--line-bright);
}

.mg-control-group {
  padding: 0 0 20px;
  margin: 0 0 20px;
  border-bottom: 1px solid var(--line);
}
.mg-control-group:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}
.mg-control-title {
  color: var(--ink-faint);
  font: 600 10px/1 var(--font);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.mg-shape > summary {
  cursor: pointer;
  list-style: none;
}
.mg-shape > summary::-webkit-details-marker {
  display: none;
}
.mg-grid2,
.mg-grid3 {
  display: grid;
  gap: 10px;
  margin-bottom: 12px;
}
.mg-grid2 {
  grid-template-columns: 1fr 1fr;
}
.mg-grid3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.mg-field,
.mg-slider,
.mg-volume {
  display: grid;
  gap: 7px;
}
.mg-field-wide {
  margin-bottom: 12px;
}
.mg-field span,
.mg-slider span,
.mg-volume span,
.mg-check span {
  color: var(--ink-faint);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.mg-field input,
.mg-field select {
  appearance: none;
  width: 100%;
  box-sizing: border-box;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--ink);
  font: 500 14px/1 var(--font);
  min-height: 38px;
  padding: 0 11px;
}
.mg-field select {
  cursor: pointer;
}
.mg-check {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 34px;
  margin: 4px 0 12px;
  cursor: pointer;
}
.mg-check input {
  width: 16px;
  height: 16px;
  accent-color: var(--ink);
}
.mg-shape-check {
  margin: 4px 0 4px;
}
.mg-slider {
  grid-template-columns: 1fr 1fr;
  margin-bottom: 12px;
}
.mg-slider span,
.mg-slider input {
  grid-column: 1 / -1;
}
.mg-slider input {
  width: 100%;
  accent-color: var(--ink);
}
.mg-slider b {
  color: var(--ink-faint);
  font: 500 10px/1 var(--font);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.mg-slider b:last-child {
  text-align: right;
}
.mg-volume {
  grid-template-columns: 1fr auto;
  align-items: center;
  margin: 2px 0 12px;
}
.mg-volume span,
.mg-volume input {
  grid-column: 1 / -1;
}
.mg-volume input {
  width: 100%;
  accent-color: var(--ink);
}
.mg-volume b {
  color: var(--ink-dim);
  font: 600 11px/1 var(--font);
  justify-self: end;
}

.mg-timbre-details {
  position: relative;
}
.mg-timbre-details > summary {
  list-style: none;
}
.mg-timbre-details > summary::-webkit-details-marker {
  display: none;
}
.mg-timbre-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  min-height: 38px;
  box-sizing: border-box;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--ink);
  font: 500 14px/1 var(--font);
  padding: 0 11px;
  cursor: pointer;
}
.mg-timbre-details[open] .mg-timbre-summary {
  border-color: var(--ink);
}
.mg-timbre-panel {
  position: absolute;
  z-index: 50;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  max-height: 320px;
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
  padding: 8px;
}
.mg-timbre-group {
  color: var(--ink-faint);
  font: 700 10px/1 var(--font);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 10px 8px 7px;
}
.mg-timbre-opt {
  appearance: none;
  display: block;
  width: 100%;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink-dim);
  font: 500 14px/1 var(--font);
  text-align: left;
  padding: 10px 9px;
  cursor: pointer;
}
.mg-timbre-opt:hover,
.mg-timbre-opt.is-active {
  background: var(--ink);
  color: var(--bg);
}
.mg-hint {
  color: var(--ink-faint);
  font-size: 12px;
  line-height: 1.5;
  margin-top: 10px;
}
.mg-wav-spin {
  display: none;
  width: 12px;
  height: 12px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  margin-left: 7px;
  animation: mgSpin 0.8s linear infinite;
}
.mg-btn.is-busy .mg-wav-spin {
  display: inline-block;
}
@keyframes mgSpin {
  to { transform: rotate(360deg); }
}

.mg-toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  opacity: 0;
  pointer-events: none;
  background: var(--ink);
  color: var(--bg);
  border-radius: 999px;
  padding: 10px 16px;
  font: 500 13px/1 var(--font);
  transition: opacity 0.2s, transform 0.2s;
  z-index: 1000;
}
.mg-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 1080px) {
  .mg-workbench {
    grid-template-columns: 1fr;
  }
  .mg-side {
    position: static;
  }
  .mg-modes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .mg-score-controls {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .mg-page {
    padding-top: 28px;
  }
  .mg-main,
  .mg-side {
    padding: 16px;
  }
  .mg-panel-head {
    flex-direction: column;
  }
  .mg-modes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .mg-score {
    width: 940px;
    min-height: 520px;
  }
  .mg-grid2,
  .mg-grid3,
  .mg-score-controls {
    grid-template-columns: 1fr;
  }
}