/* ── Beat Studio Page ── */
.studio-body {
  padding-bottom: 0;
  min-height: 100vh;
}

.studio-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: rgba(5, 5, 8, 0.95);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
}

.studio-back {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: color var(--transition);
  white-space: nowrap;
}

.studio-back:hover { color: var(--gold); }

.studio-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.studio-brand strong {
  display: block;
  font-family: var(--font-accent);
  font-size: 0.95rem;
}

.studio-brand small {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.studio-header-actions {
  display: flex;
  gap: 0.5rem;
}

/* Transport */
.studio-transport {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.transport-left,
.transport-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.transport-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  background: var(--gold-soft);
  color: var(--gold-bright);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.transport-btn:hover,
.transport-btn.playing {
  background: var(--gold);
  color: var(--bg);
  box-shadow: 0 0 24px var(--gold-glow);
}

.transport-field {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.transport-field span {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.transport-field input[type="number"],
.transport-field select {
  width: 72px;
  padding: 0.4rem 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.85rem;
}

.transport-field input[type="range"] {
  width: 80px;
  accent-color: var(--purple);
}

.transport-field em {
  font-size: 0.7rem;
  color: var(--purple);
  font-style: normal;
}

.transport-field--wide input[type="range"] {
  width: 110px;
}

.bank-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
}

.bank-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-accent);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.bank-btn:hover { color: var(--text); background: var(--purple-soft); }

.bank-btn.active {
  background: var(--gold);
  color: var(--bg);
}

.studio-pulse {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.08s, box-shadow 0.08s, transform 0.08s;
  flex-shrink: 0;
}

.studio-pulse.hit,
body.is-playing .studio-pulse {
  background: var(--gold);
  box-shadow: 0 0 12px var(--gold-glow);
}

.studio-pulse.hit {
  transform: scale(1.35);
}

/* FX bar */
.studio-fx-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  padding: 0.55rem 1.5rem;
  background: linear-gradient(180deg, rgba(139, 61, 204, 0.08), transparent);
  border-bottom: 1px solid var(--border);
}

.studio-step-readout {
  margin-left: auto;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.studio-step-readout strong {
  color: var(--gold);
  font-family: var(--font-accent);
}

/* Playhead */
.studio-playhead-wrap {
  height: 4px;
  background: var(--bg-card);
  position: relative;
  overflow: hidden;
}

.studio-playhead {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--purple), var(--gold-bright));
  transition: width 0.04s linear;
  box-shadow: 0 0 10px var(--gold-glow);
  position: relative;
}

.studio-playhead::after {
  content: '';
  position: absolute;
  right: -1px;
  top: -3px;
  width: 2px;
  height: 10px;
  background: var(--gold-bright);
  box-shadow: 0 0 8px var(--gold-glow);
}

.seq-scroll {
  overflow-x: auto;
  padding-bottom: 0.25rem;
  -webkit-overflow-scrolling: touch;
}

/* Tabs */
.studio-tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0.75rem 1.5rem 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.studio-tab {
  padding: 0.65rem 1.25rem;
  font-family: var(--font-accent);
  font-size: 0.82rem;
  font-weight: 600;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.studio-tab:hover { color: var(--text); }

.studio-tab.active {
  background: var(--bg-card);
  border-color: var(--border);
  color: var(--gold);
}

/* Main panels */
.studio-main {
  padding: 1.25rem 1.5rem 3rem;
  max-width: 1400px;
  margin: 0 auto;
}

.studio-panel {
  display: none;
}

.studio-panel.active {
  display: block;
}

.panel-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* Sequencer grid */
.seq-header {
  display: flex;
  gap: 2px;
  margin-bottom: 0.35rem;
  padding-left: 100px;
  overflow-x: auto;
}

.seq-label-spacer {
  width: 0;
  flex-shrink: 0;
}

.seq-step-num {
  width: 28px;
  min-width: 28px;
  height: 20px;
  font-size: 0.6rem;
  color: var(--text-muted);
  text-align: center;
  opacity: 0.5;
}

.seq-step-num.downbeat {
  opacity: 1;
  color: var(--purple);
  font-weight: 700;
}

.seq-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.seq-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.seq-label {
  width: 88px;
  min-width: 88px;
  font-family: var(--font-accent);
  font-size: 0.75rem;
  font-weight: 700;
  text-align: right;
  padding-right: 0.5rem;
  cursor: context-menu;
  background: transparent;
  border: none;
  color: inherit;
}

.seq-label:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.seq-steps {
  display: flex;
  gap: 2px;
}

.seq-step {
  width: 28px;
  min-width: 28px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-card);
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
  position: relative;
}

.seq-step.downbeat {
  border-color: rgba(139, 61, 204, 0.25);
}

.seq-step:hover {
  border-color: var(--track-color, var(--purple));
  background: var(--purple-soft);
}

.seq-step.on {
  background: var(--track-color, var(--gold));
  border-color: var(--track-color, var(--gold));
  box-shadow: 0 0 10px color-mix(in srgb, var(--track-color, var(--gold)) 50%, transparent);
  opacity: calc(0.45 + var(--vel, 0.85) * 0.55);
}

.seq-step.on.vel-soft {
  opacity: 0.55;
  filter: brightness(0.85);
}

.seq-step.on.vel-mid {
  opacity: 0.85;
}

.seq-step.on.vel-hard {
  opacity: 1;
  box-shadow:
    0 0 12px color-mix(in srgb, var(--track-color, var(--gold)) 60%, transparent),
    inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.seq-step.playing {
  outline: 2px solid var(--gold-bright);
  outline-offset: 1px;
  z-index: 1;
}

.melody-step small {
  font-size: 0.5rem;
  font-weight: 700;
  color: var(--bg);
  line-height: 1;
}

.melody-step.on small {
  color: var(--bg);
}

/* Mixer */
.mixer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.mixer-strip {
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

.mixer-name {
  font-family: var(--font-accent);
  font-size: 0.8rem;
  font-weight: 700;
}

.mixer-vol {
  width: 100%;
  accent-color: var(--gold);
  writing-mode: vertical-lr;
  direction: rtl;
  height: 80px;
}

.mixer-btns {
  display: flex;
  gap: 0.35rem;
}

.mixer-mute,
.mixer-solo {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.mixer-mute:hover,
.mixer-solo:hover {
  border-color: var(--text-muted);
  color: var(--text);
}

.mixer-mute.active {
  background: #ef4444;
  border-color: #ef4444;
  color: white;
}

.mixer-solo.active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--bg);
}

.mixer-strip em {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-style: normal;
}

.master-strip {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: linear-gradient(135deg, var(--purple-soft), var(--gold-soft));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: 400px;
}

.master-strip span {
  font-family: var(--font-accent);
  font-weight: 700;
}

.master-strip input {
  flex: 1;
  accent-color: var(--gold);
}

/* Audio Lab */
.audiolab-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.alab-card {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.alab-card--wide {
  grid-column: span 2;
}

.alab-card h3 {
  font-family: var(--font-accent);
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.alab-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.alab-wave {
  width: 100%;
  height: 60px;
  background: var(--bg);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
}

.alab-wave--lg { height: 100px; }

.alab-time {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.alab-btns {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.alab-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-style: italic;
}

.sample-pads,
.chord-pads {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.pad-btn,
.chord-btn {
  padding: 0.75rem 0.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  color: var(--text);
  text-align: center;
}

.pad-btn strong,
.chord-btn strong {
  display: block;
  font-size: 0.75rem;
  font-family: var(--font-accent);
}

.pad-btn small,
.chord-btn small {
  font-size: 0.65rem;
  color: var(--text-muted);
}

.pad-btn:hover,
.chord-btn:hover {
  border-color: var(--purple);
  background: var(--purple-soft);
}

.pad-btn.hit,
.chord-btn.hit {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--bg);
  transform: scale(0.95);
}

.drop-zone {
  padding: 2rem;
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.drop-zone:hover,
.drop-zone.drag {
  border-color: var(--gold);
  background: var(--gold-soft);
  color: var(--text);
}

.analyze-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.analyze-meta strong { color: var(--gold); }

.loop-controls,
.fx-controls {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.loop-controls label,
.fx-controls label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.loop-controls input,
.fx-controls input {
  accent-color: var(--purple);
}

#rec-arm.armed {
  border-color: var(--success);
  color: var(--success);
}

.studio-toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 0.75rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--gold);
  border-radius: 999px;
  font-size: 0.85rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s ease;
  z-index: 500;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.studio-toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Mobile */
@media (max-width: 900px) {
  .studio-header {
    flex-wrap: wrap;
  }

  .studio-transport {
    flex-direction: column;
    align-items: stretch;
  }

  .studio-fx-bar {
    justify-content: center;
  }

  .studio-step-readout {
    margin-left: 0;
    width: 100%;
    text-align: center;
  }

  .transport-left,
  .transport-right {
    justify-content: center;
  }

  .audiolab-grid {
    grid-template-columns: 1fr;
  }

  .alab-card--wide {
    grid-column: span 1;
  }

  .seq-label {
    width: 64px;
    min-width: 64px;
    font-size: 0.65rem;
  }

  .seq-header { padding-left: 72px; }

  .seq-step {
    width: 24px;
    min-width: 24px;
    height: 32px;
  }

  .seq-step-num {
    width: 24px;
    min-width: 24px;
  }
}

@media (max-width: 640px) {
  .sample-pads,
  .chord-pads {
    grid-template-columns: repeat(2, 1fr);
  }

  .studio-header-actions { display: none; }

  .studio-header {
    padding: 0.75rem 1rem;
    padding-top: max(0.75rem, env(safe-area-inset-top));
  }

  .studio-transport,
  .studio-fx-bar {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .transport-right {
    width: 100%;
    justify-content: stretch;
  }

  .transport-right .btn,
  .transport-right .btn-sm,
  .transport-right .sort-select {
    flex: 1 1 auto;
    min-width: 0;
  }

  .transport-btn {
    width: 52px;
    height: 52px;
  }

  .seq-step {
    width: 28px;
    min-width: 28px;
    height: 40px;
  }

  .seq-step-num {
    width: 28px;
    min-width: 28px;
  }

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

  .studio-main {
    padding: 1rem 1rem 5rem;
  }

  .studio-tabs {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .tool-credit {
    padding-bottom: max(1.25rem, env(safe-area-inset-bottom));
  }
}

@media (hover: none) and (pointer: coarse) {
  .seq-step {
    width: 32px;
    min-width: 32px;
    height: 42px;
  }
}