.shell {
  width: min(1380px, calc(100% - 40px));
  margin: 0 auto;
  padding: 18px 0 44px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, 100%);
  min-height: 54px;
  margin: 0 auto 12px;
  padding: 0 2px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: #11130c;
  background: var(--accent);
  border-radius: 9px;
  font-size: 12px;
  font-weight: 950;
  letter-spacing: -1px;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 14px;
  letter-spacing: 0.16em;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.05em;
}

.header-actions,
.status,
.github-link {
  display: flex;
  align-items: center;
}

.header-actions {
  gap: 10px;
}

.status {
  min-height: 36px;
  padding: 0 13px;
  gap: 9px;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 13px;
}

.status-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.status.is-error .status-dot {
  background: var(--danger);
}

.github-link {
  min-height: 36px;
  padding: 0 13px;
  gap: 8px;
  color: #dedee3;
  background: var(--panel-raised);
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 12px;
  font-weight: 650;
  text-decoration: none;
  transition: background 150ms ease, border-color 150ms ease;
}

.github-link:hover {
  background: #222329;
  border-color: var(--line-strong);
}

.github-mark {
  font: 800 13px/1 var(--font-mono);
}

.studio {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  width: min(1120px, 100%);
  margin: 0 auto;
  gap: 12px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 49px;
  padding: 0 16px;
  gap: 12px;
  border-bottom: 1px solid var(--line);
}

.panel-head h2 {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.panel-head small {
  color: var(--muted);
  font: 10px var(--font-mono);
  letter-spacing: 0.08em;
}

.signal-panel,
.melody-panel,
.settings-panel {
  width: 100%;
  margin-inline: auto;
}

.signal-panel,
.melody-panel,
.handoff {
  overflow: hidden;
}

.visual {
  position: relative;
  height: 116px;
  background: var(--surface);
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.visual-label,
.visual-note {
  position: absolute;
  top: 11px;
  z-index: 1;
  color: var(--muted);
  font: 10px var(--font-mono);
}

.visual-label {
  left: 15px;
  top: 12px;
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.visual-note {
  right: 15px;
}

.transport {
  display: flex;
  align-items: center;
  min-height: 58px;
  padding: 10px 12px;
  gap: 10px;
  background: #18191e;
  border-top: 1px solid var(--line);
}

.play-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 106px;
  padding: 10px 14px;
  gap: 9px;
  color: #10120b;
  background: var(--accent);
  border-radius: 8px;
  font-weight: 850;
}

.time {
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.session-meta {
  display: flex;
  align-items: center;
  margin-left: auto;
  gap: 18px;
}

.session-meta div {
  min-width: 74px;
}

.session-meta b,
.session-meta span {
  display: block;
}

.session-meta b {
  font: 11px var(--font-mono);
}

.session-meta span {
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sequence-wrap {
  padding: 15px 14px 13px;
  overflow-x: auto;
}

.sequence-title {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 18px;
}

.sequence-title b {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.sequence-title span {
  color: var(--muted);
  font-size: 10px;
  text-align: right;
}

.step-grid,
.beat-numbers {
  display: grid;
  grid-template-columns: 24px repeat(36, minmax(23px, 1fr));
  min-width: 1060px;
  gap: 5px;
}

.degree-label {
  display: grid;
  place-items: center;
  color: #777781;
  font-size: 9px;
}

.step-cell {
  min-height: 24px;
  padding: 0;
  aspect-ratio: 1;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.055);
  border-radius: 4px;
}

.step-cell.beat {
  border-color: rgba(255, 255, 255, 0.12);
}

.step-cell.active {
  background: var(--accent-2);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 0 16px rgba(123, 108, 255, 0.28);
}

.step-cell.playing {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.step-cell.active.playing {
  background: var(--accent);
}

.beat-numbers {
  margin-top: 7px;
}

.beat-numbers span {
  color: #666671;
  font-size: 9px;
  text-align: center;
}

.lower-grid {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  width: 100%;
  gap: 12px;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(130px, 1fr));
  padding: 3px 16px 15px;
  gap: 4px 18px;
}

.field {
  margin-top: 11px;
}

.field.wide {
  grid-column: span 2;
}

.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 7px;
  gap: 12px;
}

label,
.toggle-row > span {
  color: #d9d7dd;
  font-size: 12px;
}

output {
  min-width: 42px;
  color: var(--accent);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

select,
input[type="text"] {
  width: 100%;
  height: 40px;
  padding: 0 11px;
  color: var(--text);
  background: #14151c;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.seed-wrap {
  display: grid;
  grid-template-columns: 1fr 40px;
  gap: 8px;
}

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

.control-toggles {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  grid-column: 1 / -1;
  padding-top: 8px;
  gap: 24px;
  border-top: 1px solid var(--line);
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-width: 155px;
  padding: 6px 0;
  gap: 14px;
}

.switch {
  position: relative;
  width: 42px;
  height: 24px;
}

.switch input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
}

.switch span {
  position: absolute;
  inset: 0;
  background: #393a45;
  border-radius: 999px;
  transition: background 200ms ease;
}

.switch span::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  content: "";
  transition: transform 200ms ease;
}

.switch input:checked + span {
  background: var(--accent-2);
}

.switch input:checked + span::after {
  transform: translateX(18px);
}

.switch:has(input:focus-visible) span {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.sfx-strip {
  display: flex;
  flex-wrap: wrap;
  padding: 12px 16px 16px;
  gap: 8px;
  border-top: 1px solid var(--line);
}

.sfx-label {
  display: grid;
  align-items: center;
  margin-right: 5px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sfx-btn {
  flex: 0 1 72px;
  padding: 9px 8px;
  border-radius: 8px;
  font-size: 11px;
}

.handoff {
  align-self: flex-start;
  width: min(390px, 100%);
}

.handoff-toggle {
  display: flex;
  align-items: center;
  padding: 7px 0 7px 12px;
  gap: 10px;
  color: var(--muted);
  background: transparent;
  border: 0;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.handoff-toggle::after {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 15px;
  content: "−";
}

.handoff.collapsed .handoff-toggle::after {
  content: "+";
}

.handoff-body {
  display: block;
}

.handoff.collapsed .handoff-body {
  display: none;
}

.handoff-copy {
  margin: 13px 15px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

.tabs {
  display: flex;
  padding: 0 12px;
  border-bottom: 1px solid var(--line);
}

.tab {
  flex: 1;
  padding: 11px 7px;
  color: var(--muted);
  background: transparent;
  border-bottom: 2px solid transparent;
  font-size: 11px;
}

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

textarea {
  width: 100%;
  min-height: 350px;
  padding: 16px;
  resize: vertical;
  color: #cfd0da;
  background: #111218;
  border: 0;
  font: 11.5px/1.55 var(--font-mono);
}

.handoff-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  padding: 12px;
  gap: 8px;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  z-index: 20;
  padding: 11px 16px;
  color: #11130c;
  background: var(--accent);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 800;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 20px);
  transition: opacity 250ms ease, transform 250ms ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}