:root {
  --bg: #0c0d10;
  --bg-elevated: #14161c;
  --border: #2a2e38;
  --text: #e8eaef;
  --muted: #8b919d;
  --accent: #ff6b35;
  --accent-dim: #c44e28;
  --cyan: #2dd4bf;
  --violet: #a78bfa;
  --danger: #f43f5e;
  --radius: 6px;
  --font-display: "Syne", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 15px;
}

body {
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(255, 107, 53, 0.12), transparent),
    linear-gradient(180deg, #0e0f12 0%, var(--bg) 40%);
}

#app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.brand-block {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.studio-home {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.studio-home:hover {
  color: var(--accent);
}

.top-bar h1 {
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: 1.75rem;
}

.export-hint {
  max-width: 14rem;
  line-height: 1.35;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.status-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}

.status-pill.idle {
  color: var(--muted);
}

.status-pill.live {
  color: var(--cyan);
  border-color: rgba(45, 212, 191, 0.4);
}

.visualizer-panel {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #08090b;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

#viz-canvas {
  display: block;
  width: 100%;
  height: auto;
  max-height: 28vh;
}

.viz-legend {
  display: flex;
  gap: 1rem;
  padding: 0.35rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.leg.wave::before,
.leg.spec::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 0.35rem;
  border-radius: 2px;
  vertical-align: middle;
}

.leg.wave::before {
  background: var(--cyan);
}

.leg.spec::before {
  background: var(--accent);
}

.transport-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 0.65rem 0;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.panel-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
}

.tab {
  font-family: var(--font-display);
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--muted);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius);
  cursor: pointer;
}

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

.tab.active {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}

.panels {
  position: relative;
}

.panel {
  display: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  padding: 1rem 1.1rem 1.25rem;
  margin-top: 0.25rem;
}

.panel.active {
  display: block;
}

.panel-head {
  margin-bottom: 1rem;
}

.panel-head h2 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  max-width: 52ch;
}

.btn {
  font-family: var(--font-display);
  font-weight: 600;
  border: 1px solid var(--border);
  background: #1a1d24;
  color: var(--text);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius);
  cursor: pointer;
}

.btn:hover {
  border-color: var(--muted);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent-dim);
  color: #0c0d10;
}

.btn-primary:hover {
  filter: brightness(1.05);
}

.btn-ghost {
  background: transparent;
}

.inline {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.inline input[type="number"] {
  width: 4.5rem;
  padding: 0.25rem 0.35rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
}

select,
input[type="range"] {
  accent-color: var(--accent);
}

select {
  padding: 0.3rem 0.45rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.tracks-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.track-block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  background: #101218;
}

.track-block.active-design {
  box-shadow: 0 0 0 1px var(--cyan);
}

.track-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-bottom: 0.65rem;
}

.track-title {
  font-weight: 700;
  min-width: 5rem;
}

.track-header label {
  font-size: 0.78rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.step-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: flex-end;
}

.step-cell {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.2rem;
  min-width: 3.4rem;
}

.step-cell label.idx {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  text-align: center;
}

.step-toggle {
  width: 100%;
  height: 2rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: #1c2028;
  cursor: pointer;
  position: relative;
}

.step-toggle.on {
  background: linear-gradient(180deg, rgba(255, 107, 53, 0.35), rgba(255, 107, 53, 0.08));
  border-color: var(--accent-dim);
}

.step-toggle.current::after {
  content: "";
  position: absolute;
  inset: auto 2px -4px 2px;
  height: 3px;
  background: var(--cyan);
  border-radius: 2px;
}

.step-cell select.note {
  font-size: 0.68rem;
  padding: 0.15rem;
  max-width: 100%;
}

.step-cell input.vel {
  width: 100%;
  height: 1.5rem;
}

.sound-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.sound-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 0.85rem;
  background: #101218;
}

.sound-card h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--cyan);
}

.sound-card label {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0.45rem;
}

.sound-card label.row-inline {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.sound-card label.row-inline span.val {
  font-family: var(--font-mono);
  color: var(--text);
  min-width: 2.5rem;
  text-align: right;
}

.sound-card input[type="range"] {
  width: 100%;
}

.midi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  align-items: start;
}

.midi-grid label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.check {
  flex-direction: row !important;
  align-items: center;
  gap: 0.5rem !important;
}

.mono {
  font-family: var(--font-mono);
}

.small {
  font-size: 0.78rem;
  color: var(--muted);
}

.mixer-strip-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.mixer-strip {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.65rem;
  min-width: 120px;
  background: #101218;
}

.mixer-strip h4 {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
}

.mixer-strip label {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.mixer-strip input[type="range"] {
  width: 100%;
}

.master-strip {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  max-width: 360px;
}

.master-strip h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.master-strip label {
  display: block;
  margin-bottom: 0.65rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.sound-track-select {
  margin-top: 0.5rem;
}

@media (max-width: 720px) {
  .step-cell {
    min-width: 2.9rem;
  }
}