/* ── Design Tokens ──────────────────────────────────────────────────────── */
:root {
  --nm-bg:           #051424;
  --nm-surface:      #0d1c2d;
  --nm-surface-mid:  #122131;
  --nm-surface-high: #1c2b3c;
  --nm-surface-top:  #273647;
  --nm-accent:       #00daf3;
  --nm-accent-dim:   rgba(0,218,243,0.15);
  --nm-text:         #d4e4fa;
  --nm-text-muted:   #849396;
  --nm-border:       #3b494c;
  --nm-red:          #ff4444;
  --nm-green:        #44cc44;
  --nm-yellow:       #ffaa00;
}

/* ── Basic Reset ────────────────────────────────────────────────────────── */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Hanken Grotesk', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background-color: var(--nm-bg);
  color: var(--nm-text);
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* Native form element dark theming */
select,
input[type="number"],
input[type="text"] {
  background-color: var(--nm-surface-high);
  color: var(--nm-text);
  border: 1px solid var(--nm-border);
  border-radius: 4px;
  padding: 4px 6px;
  outline: none;
}
select:focus,
input[type="number"]:focus,
input[type="text"]:focus {
  border-color: var(--nm-accent);
}

/* ── Header ─────────────────────────────────────────────────────────────── */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--nm-bg);
  color: var(--nm-text);
  font-size: 14px;
  border-bottom: 2px solid var(--nm-accent);
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
  flex-shrink: 0;
}
header h1 {
  font-size: 20px;
  margin-right: 10px;
}
#backingTrackControls {
  display: flex;
  align-items: center;
  gap: 10px;
}
#addBackingTrackButton {
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
  background-color: var(--nm-surface-high);
  color: var(--nm-text);
  border: 1px solid var(--nm-accent);
  border-radius: 4px;
  transition: background-color 0.2s;
}
#addBackingTrackButton:hover {
  background-color: var(--nm-surface-top);
}
#backingTrackPlayer {
  display: none;
  align-items: center;
  gap: 5px;
}
#backingTrackVolume {
  width: 100px;
}
#toggleBackingFx {
  padding: 4px 8px;
  font-size: 12px;
  cursor: pointer;
  background-color: var(--nm-surface-high);
  color: var(--nm-text);
  border: 1px solid var(--nm-accent);
  border-radius: 4px;
}
#toggleBackingFx:hover {
  background-color: var(--nm-surface-top);
}
#backingFxPanel {
  border-top: 1px solid var(--nm-border);
  padding-top: 6px;
}
.bt-fx-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}
.bt-fx-row label {
  width: 62px;
  font-size: 12px;
}
.bt-fx-row input[type=range] {
  width: 80px;
}
#btDelayRateLabel {
  font-size: 11px;
  min-width: 28px;
  color: var(--nm-text-muted);
}
.bt-link-btn {
  width: 22px;
  height: 22px;
  padding: 0;
  font-size: 11px;
  line-height: 1;
  cursor: pointer;
  background-color: var(--nm-surface-high);
  color: var(--nm-text);
  border: 1px solid var(--nm-border);
  border-radius: 3px;
}
.bt-link-btn.linked {
  background-color: var(--nm-accent);
  border-color: var(--nm-accent);
  color: #ffffff;
}
.bt-slider-linked {
  opacity: 0.4;
}
.bt-modal-content {
  max-width: 460px;
}
#btTrackList {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 12px 0;
  max-height: 320px;
  overflow-y: auto;
}
.bt-track-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  background: var(--nm-surface-high);
  border-radius: 4px;
  border: 1px solid transparent;
}
.bt-track-row.bt-track-loaded {
  border-color: var(--nm-accent);
  background: var(--nm-accent-dim);
}
.bt-track-name {
  flex: 1;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--nm-text);
}
.bt-track-load {
  flex-shrink: 0;
  padding: 3px 10px;
  font-size: 12px;
  background: none;
  border: 1px solid var(--nm-accent);
  color: var(--nm-accent);
  border-radius: 3px;
  cursor: pointer;
}
.bt-track-load:hover {
  background: var(--nm-accent);
  color: #ffffff;
}
.bt-track-del {
  flex-shrink: 0;
  background: none;
  border: none;
  color: var(--nm-red);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
}
.bt-track-del:hover { color: #ff7777; }
.bt-upload-row {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--nm-border);
}
#btLoadedLabel {
  font-size: 11px;
  color: var(--nm-accent);
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex-shrink: 0;
}
header > div:last-child button {
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
  margin-left: 5px;
  background-color: var(--nm-surface-high);
  color: var(--nm-text);
  border: 1px solid var(--nm-accent);
  border-radius: 4px;
  transition: background-color 0.2s;
}
header > div:last-child button:hover {
  background-color: var(--nm-surface-top);
}
#toggleControls {
  background-color: var(--nm-accent);
  color: #ffffff;
  border: 1px solid var(--nm-accent);
  border-radius: 4px;
  transition: background-color 0.2s;
}

/* ── Container ──────────────────────────────────────────────────────────── */
.container {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  background-color: var(--nm-bg);
  padding: 10px;
  gap: 10px;
}

/* ── Top Controls ───────────────────────────────────────────────────────── */
#topControls {
  padding: 8px;
  background-color: var(--nm-surface-mid);
  border: 1px solid var(--nm-border);
  border-radius: 4px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}
.scale-select {
  display: flex;
  align-items: center;
  gap: 5px;
}

/* ── Transport Section ──────────────────────────────────────────────────── */
#transportSection {
  padding: 8px;
  background-color: var(--nm-surface-mid);
  border: 1px solid var(--nm-border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}

/* ── Effects Section ────────────────────────────────────────────────────── */
#effectsSection {
  display: flex;
  background-color: var(--nm-surface-mid);
  border: 1px solid var(--nm-border);
  border-radius: 4px;
  padding: 10px;
  gap: 10px;
  font-size: 14px;
}
#effectsSliders {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.effect-slider-group {
  display: flex;
  flex-direction: column;
}
.effect-slider-group label {
  margin-bottom: 2px;
  font-size: 12px;
  color: var(--nm-text);
}
#rightColumn {
  width: 100%;
  display: flex;
  flex-direction: column;
}
#uploadedFilesList {
  width: 100%;
  background-color: var(--nm-surface-mid);
  border: 1px solid var(--nm-border);
  border-radius: 4px;
  padding: 8px;
  overflow-y: visible;
  font-size: 14px;
}
#recordingControls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}
#recordButton {
  width: 30px;
  height: 30px;
  background-color: var(--nm-red);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 0.2s, box-shadow 0.2s;
}
#recordButton.recording {
  background-color: #ff6666;
  box-shadow: 0 0 12px rgba(255,68,68,0.5);
}
#recordTimer {
  font-size: 14px;
  font-family: 'Geist', monospace;
}
#paginationControls {
  flex-basis: 100%;
  display: block;
  width: 100%;
  text-align: center;
  margin-top: 10px;
  clear: both;
}
#paginationControls button {
  padding: 4px 8px;
  background-color: var(--nm-accent);
  color: #ffffff;
  border: 1px solid var(--nm-accent);
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
}
#paginationControls button:hover {
  background-color: var(--nm-surface-top);
  color: var(--nm-accent);
}

/* ── Slider Styling ─────────────────────────────────────────────────────── */
input[type="range"] {
  margin: 0;
  width: 100%;
  max-width: 300px;
  min-width: 250px;
  -webkit-appearance: none;
  background: transparent;
}
@media (max-width: 480px) {
  input[type="range"] {
    max-width: 130px;
    min-width: 80px;
  }
}
input[type="range"]::-webkit-slider-runnable-track {
  width: 100%;
  height: 8px;
  cursor: pointer;
  background: var(--nm-border);
  border-radius: 5px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  border: none;
  height: 20px;
  width: 20px;
  border-radius: 50%;
  background: var(--nm-accent);
  cursor: pointer;
  margin-top: -6px;
  box-shadow: 0 0 8px rgba(0,218,243,0.4);
}
input[type="range"]::-moz-range-track {
  width: 100%;
  height: 8px;
  cursor: pointer;
  background: var(--nm-border);
  border-radius: 5px;
}
input[type="range"]::-moz-range-thumb {
  border: none;
  height: 20px;
  width: 20px;
  border-radius: 50%;
  background: var(--nm-accent);
  cursor: pointer;
}
input[type="range"]::-ms-track {
  width: 100%;
  height: 8px;
  cursor: pointer;
  background: var(--nm-border);
  border-radius: 5px;
  border: none;
}
input[type="range"]:focus {
  outline: none;
}
#effectsPaginationControls {
  width: 100%;
  text-align: center;
  margin-top: 10px;
}

/* ── Keyboard Container ─────────────────────────────────────────────────── */
#keyboardContainer,
#sequencerKeyboardContainer {
  display: flex;
  flex: 1;
  background-color: var(--nm-surface);
  align-items: stretch;
  position: relative;
  padding: 10px;
  border: 1px solid var(--nm-border);
  border-radius: 4px;
}
.octaveButton {
  background-color: var(--nm-accent);
  color: #ffffff;
  border: 1px solid var(--nm-accent);
  width: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  border-radius: 4px;
  transition: background-color 0.2s;
}
.octaveButton:hover {
  background-color: #009fbc;
}
#keyboard,
#sequencerKeyboard {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: stretch;
  padding: 5px;
}
.key {
  border: 1px solid var(--nm-border);
  margin: 2px;
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  user-select: none;
  touch-action: none;
  font-weight: bold;
  color: #0d1c2d;
  position: relative;
  border-radius: 4px;
  background-color: #d0e8f0;
  transition: background-color 0.15s, box-shadow 0.15s;
  cursor: pointer;
}
.key.natural {
  background-color: #d0e8f0;
  color: #0d1c2d;
}
.key.sharp {
  background-color: #071e30;
  color: var(--nm-accent);
  border-color: var(--nm-surface-top);
}
.key:active {
  transform: scale(0.98);
}
.key.pressed {
  background-color: var(--nm-accent) !important;
  color: #ffffff !important;
  box-shadow: 0 0 16px rgba(0,218,243,0.5);
}
@media (max-width: 600px) {
  #keyboard,
  #sequencerKeyboard {
    flex-direction: row;
  }
}

/* ── Scrollbar ──────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--nm-bg); }
::-webkit-scrollbar-thumb { background: var(--nm-border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--nm-accent); }

/* ── Modals ─────────────────────────────────────────────────────────────── */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.7);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}
.modal-content {
  background-color: var(--nm-surface-mid);
  padding: 20px;
  border-radius: 8px;
  width: 90%;
  max-width: 800px;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  border: 1px solid var(--nm-border);
}
.close-modal {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 24px;
  cursor: pointer;
  color: var(--nm-text-muted);
  transition: color 0.15s;
}
.close-modal:hover {
  color: var(--nm-text);
}

/* ── Step Sequencer ─────────────────────────────────────────────────────── */
#sequencerBars {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}
.sequencer-bar {
  display: flex;
  gap: 5px;
  align-items: center;
}
.step {
  width: 30px;
  height: 30px;
  background-color: var(--nm-surface-top);
  border: 1px solid var(--nm-border);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 12px;
  color: var(--nm-text);
  transition: background-color 0.2s;
}
.step.active {
  background-color: var(--nm-accent);
  color: #ffffff;
  box-shadow: 0 0 8px rgba(0,218,243,0.3);
}
.duration-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 4px;
  background-color: var(--nm-red);
  border-radius: 0 0 4px 4px;
  transition: width 0.2s;
}
.duration-slider-container {
  position: absolute;
  background-color: var(--nm-surface-high);
  padding: 10px;
  border: 1px solid var(--nm-border);
  border-radius: 4px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.6);
  z-index: 1001;
  display: none;
}
#addBarButton,
#exportSequenceButton {
  padding: 6px 12px;
  background-color: var(--nm-accent);
  color: #ffffff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin: 10px 5px 0 0;
}
#addBarButton:hover,
#exportSequenceButton:hover {
  background-color: #009fbc;
}
#toggleSequencer {
  padding: 6px 12px;
  background-color: var(--nm-surface-top);
  color: var(--nm-text);
  border: 1px solid var(--nm-accent);
  border-radius: 4px;
  cursor: pointer;
  margin-top: 10px;
}
#toggleSequencer.running {
  background-color: var(--nm-accent);
  color: #ffffff;
}
#sequencerKeyboardContainer {
  margin-top: 20px;
}

/* ── FX Open Button ─────────────────────────────────────────────────────── */
#effectsControls {
  display: flex;
  align-items: flex-start;
  padding: 2px 0;
}
#openFxModal {
  padding: 5px 14px;
  font-size: 13px;
  font-weight: 600;
  background: var(--nm-accent);
  color: #ffffff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
}
#openFxModal:hover {
  background: #009fbc;
}

/* ── FX Modal ───────────────────────────────────────────────────────────── */
.fx-modal-content {
  width: 95%;
  max-width: 680px;
  max-height: 90vh;
  padding: 20px 20px 24px;
}

/* FX Grid — 2 columns on desktop, 1 on mobile */
.fx-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 28px;
  margin-top: 14px;
}
@media (max-width: 520px) {
  .fx-grid {
    grid-template-columns: 1fr;
  }
}

.fx-group h3 {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--nm-text-muted);
  margin: 0 0 10px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--nm-border);
}

/* FX Row — label + slider + value */
.fx-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.fx-row label {
  width: 90px;
  font-size: 12px;
  color: var(--nm-text);
  flex-shrink: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.fx-row input[type="range"] {
  flex: 1;
  min-width: 50px;
  max-width: none;
  width: auto;
}

/* FX value badge */
.fx-val {
  width: 30px;
  text-align: right;
  font-size: 11px;
  color: var(--nm-accent);
  cursor: pointer;
  user-select: none;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  font-family: 'Geist', monospace;
}
.fx-val:hover {
  text-decoration: underline;
}

/* FX inline number editor */
.fx-val-input {
  width: 44px;
  font-size: 11px;
  padding: 1px 4px;
  border: 1px solid var(--nm-accent);
  border-radius: 3px;
  text-align: center;
  flex-shrink: 0;
  outline: none;
  color: var(--nm-text);
  background-color: var(--nm-surface-high);
}

/* Sequencer external play/stop button */
#seqPlayStopBtn {
  padding: 6px 10px;
  font-size: 14px;
  background-color: var(--nm-surface-top);
  color: var(--nm-text);
  border: 1px solid var(--nm-accent);
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
}
#seqPlayStopBtn.running {
  background-color: var(--nm-accent);
  color: #ffffff;
}
#seqPlayStopBtn:hover:not(.running) {
  background-color: var(--nm-surface-high);
}

/* Sequencer bar buttons */
.seq-dup-btn {
  padding: 3px 7px;
  font-size: 14px;
  background-color: var(--nm-surface-top);
  color: var(--nm-text);
  border: 1px solid var(--nm-border);
  border-radius: 3px;
  cursor: pointer;
  margin-left: 6px;
  flex-shrink: 0;
  line-height: 1;
  transition: background-color 0.2s;
}
.seq-dup-btn:hover {
  background-color: var(--nm-accent);
  color: #ffffff;
  border-color: var(--nm-accent);
}
.seq-remove-btn {
  padding: 3px 7px;
  font-size: 14px;
  background-color: var(--nm-surface-top);
  color: var(--nm-text);
  border: 1px solid var(--nm-border);
  border-radius: 3px;
  cursor: pointer;
  margin-left: 4px;
  flex-shrink: 0;
  line-height: 1;
  transition: background-color 0.2s;
}
.seq-remove-btn:hover {
  background-color: var(--nm-red);
  color: #ffffff;
  border-color: var(--nm-red);
}

/* ── CPU performance indicator ──────────────────────────────────────────── */
#perfIndicator {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
  margin-left: 4px;
}
.perf-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--nm-text-muted);
  flex-shrink: 0;
}
#perfBarTrack {
  width: 60px;
  height: 8px;
  background-color: var(--nm-border);
  border-radius: 4px;
  overflow: hidden;
}
#perfBar {
  height: 100%;
  width: 100%;
  background-color: var(--nm-green);
  border-radius: 4px;
  transform-origin: left center;
  transform: scaleX(0);
  will-change: transform;
}

/* Limiter — full-width fx-group */
.fx-group-wide {
  grid-column: 1 / -1;
}

/* ── Transport peak dot ─────────────────────────────────────────────────── */
#peakDot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--nm-green);
  flex-shrink: 0;
}

/* ── Peak meter ─────────────────────────────────────────────────────────── */
#peakMeter {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}
#peakMeterTrack {
  flex: 1;
  height: 12px;
  background-color: var(--nm-border);
  border-radius: 6px;
  overflow: hidden;
}
#peakMeterBar {
  height: 100%;
  width: 100%;
  background-color: var(--nm-green);
  border-radius: 6px;
  transform-origin: left center;
  transform: scaleX(0);
  will-change: transform;
}
#peakMeterClip {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--nm-border);
  border: 1px solid var(--nm-border);
  border-radius: 3px;
  padding: 2px 6px;
  cursor: pointer;
  user-select: none;
  flex-shrink: 0;
  transition: color 0.1s, border-color 0.1s;
}
#peakMeterClip.active {
  color: var(--nm-red);
  border-color: var(--nm-red);
}

/* ── Sample Edit Modal ──────────────────────────────────────────────────── */
.sample-edit-content {
  width: 95%;
  max-width: 460px;
  max-height: 90vh;
}
.sample-edit-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.sample-edit-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sample-edit-label {
  width: 58px;
  font-size: 12px;
  color: var(--nm-text);
  flex-shrink: 0;
}
.sample-edit-row input[type="range"] {
  flex: 1;
  min-width: 50px;
  max-width: none;
  width: auto;
}
.sample-edit-val {
  width: 26px;
  text-align: right;
  font-size: 11px;
  color: var(--nm-accent);
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  font-family: 'Geist', monospace;
}
.sample-reset-btn {
  width: 22px;
  height: 22px;
  padding: 0;
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  background-color: var(--nm-surface-top);
  color: var(--nm-text);
  border: 1px solid var(--nm-border);
  border-radius: 3px;
  flex-shrink: 0;
  transition: background-color 0.2s;
}
.sample-reset-btn:hover {
  background-color: var(--nm-accent);
  color: #ffffff;
  border-color: var(--nm-accent);
}
.sample-edit-row.using-global .sample-edit-slider,
.sample-edit-row.using-global .sample-edit-val {
  opacity: 0.35;
}
.sample-edit-row.using-global .sample-edit-label::after {
  content: ' (global)';
  font-size: 9px;
  color: var(--nm-text-muted);
}
#sampleWaveform {
  display: block;
  width: 100%;
  height: 80px;
  border-radius: 4px;
  margin-bottom: 6px;
  border: 1px solid var(--nm-border);
  cursor: crosshair;
  touch-action: none;
  background: var(--nm-surface);
}
.sample-trim-reset {
  display: block;
  margin-bottom: 14px;
  padding: 3px 10px;
  font-size: 11px;
  background: none;
  border: 1px solid var(--nm-border);
  color: var(--nm-text-muted);
  border-radius: 3px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.sample-trim-reset:hover {
  border-color: var(--nm-accent);
  color: var(--nm-accent);
}

/* ── Button press + hover polish ────────────────────────────────────────── */
button {
  transition: transform 0.1s, background-color 0.15s;
}
button:active {
  transform: scale(0.95);
}

/* ── Atmospheric background blobs ───────────────────────────────────────── */
.nm-atmos {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}
.nm-atmos-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.1;
}
.nm-atmos-1 {
  width: 500px;
  height: 500px;
  top: 25%;
  left: 20%;
  background: var(--nm-accent);
}
.nm-atmos-2 {
  width: 600px;
  height: 600px;
  bottom: 20%;
  right: 15%;
  background: var(--nm-surface-top);
}

/* ── Responsive: tablet / landscape phone ──────────────────────────────── */
@media (max-width: 768px) {
  .container {
    padding: 8px;
    gap: 8px;
  }
  #keyboardContainer {
    min-height: 130px;
  }
}

/* ── Responsive: portrait phone ────────────────────────────────────────── */
@media (max-width: 600px) {
  /* Header — allow wrapping */
  header {
    padding: 8px 10px;
    flex-wrap: wrap;
    gap: 6px;
  }
  header h1 { font-size: 16px; }
  #backingTrackControls { flex-wrap: wrap; gap: 6px; }
  #backingTrackVolume { width: 70px; }
  header > div:last-child { flex-wrap: wrap; gap: 4px; }
  header > div:last-child button { padding: 4px 8px; font-size: 12px; }

  /* Container & control sections */
  .container { padding: 6px; gap: 6px; }
  #topControls { padding: 4px 8px; gap: 6px; font-size: 13px; }
  #transportSection { flex-wrap: wrap; padding: 4px 8px; gap: 6px; font-size: 13px; }
  #effectsSection { padding: 6px 8px; gap: 6px; }

  /* Metronome volume slider — overflow culprit in transport */
  #metronomeVolume { max-width: 80px; min-width: 50px; }

  /* Backing-track FX sliders — flex instead of fixed 80px */
  .bt-fx-row input[type=range] { flex: 1; width: auto; max-width: none; min-width: 0; }

  /* Touch targets */
  button { min-height: 36px; }
  input[type="number"] { min-height: 36px; }
  #recordButton { width: 36px; height: 36px; }
  .octaveButton { min-height: 44px; width: 34px; }

  /* Key labels — smaller text in narrow keys */
  .key { font-size: 9px; }

  /* All modals — full screen */
  .modal-content,
  .fx-modal-content,
  .sample-edit-content,
  .bt-modal-content {
    width: 100%;
    height: 100%;
    max-height: 100vh;
    max-height: 100dvh;
    border-radius: 0;
    padding: 16px;
    margin: 0;
  }

  /* Sequencer — larger touch targets, horizontal scroll */
  .step { width: 36px; height: 36px; }
  .sequencer-bar { overflow-x: auto; }
}