:root {
  color-scheme: dark;
  --bg: #14161c;
  --surface: #1d2029;
  --surface-2: #262b38;
  --text: #f2f3f7;
  --text-dim: #9198ab;
  --accent: #6ee7b7;
  --accent-strong: #34d399;
  --danger: #f87171;
  --border: #333848;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.app {
  max-width: 520px;
  margin: 0 auto;
  padding: 24px 20px 60px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.app__header {
  text-align: center;
}

.app__header h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: 0.02em;
}

.app__tagline {
  margin: 4px 0 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.app__footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.75rem;
}

.display {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  transition: box-shadow 0.15s ease;
}

.display--flash {
  box-shadow: 0 0 0 3px var(--accent) inset;
}

.display__bar-dots {
  display: flex;
  gap: 8px;
  min-height: 12px;
}

.display__bar-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--surface-2);
  transition: background 0.06s ease, transform 0.06s ease;
}

.display__bar-dots span.active {
  background: var(--accent);
  transform: scale(1.2);
}

.display__bar-dots span.downbeat {
  background: var(--surface-2);
  border: 1px solid var(--text-dim);
}

.display__bar-dots span.downbeat.active {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.display__now {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.display__label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

.display__icon {
  display: block;
  color: var(--text);
}

.display__icon svg {
  display: block;
}

.display__icon--now {
  min-height: 80px;
}

.display__icon--now svg {
  width: 150px;
  height: auto;
}

.display__icon--next {
  min-height: 48px;
  color: var(--accent);
}

.display__icon--next svg {
  width: 90px;
  height: auto;
}

.display__name {
  font-size: 1.4rem;
  font-weight: 600;
}

.display__next {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-height: 44px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.display__next.visible {
  opacity: 1;
}

.display__next .display__name {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent);
}

.transport {
  display: flex;
  gap: 10px;
}

.btn {
  flex: 1;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  background: var(--surface-2);
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--accent-strong);
  color: #06251a;
  border-color: var(--accent-strong);
  font-weight: 600;
}

.btn--primary:hover {
  background: var(--accent);
}

.btn--primary.is-playing {
  background: var(--danger);
  border-color: var(--danger);
  color: #2a0a0a;
}

.btn--small {
  flex: 0 0 auto;
  width: 40px;
  padding: 8px 0;
  font-size: 1.2rem;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.controls__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.control {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control label {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.control__row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.control input[type="number"] {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px;
  font-size: 1rem;
  text-align: center;
}

.control select {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px;
  font-size: 0.95rem;
}

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

.subdivisions {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.accordion {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  background: none;
  border: none;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
}

.accordion__trigger:hover {
  background: var(--surface-2);
}

.accordion__meta {
  margin-left: auto;
  color: var(--text-dim);
  font-weight: 400;
  font-size: 0.85rem;
}

.accordion__chevron {
  transition: transform 0.15s ease;
  color: var(--text-dim);
}

.accordion__trigger[aria-expanded="true"] .accordion__chevron {
  transform: rotate(180deg);
}

.accordion__panel {
  padding: 0 14px 14px;
}

.subdivisions__list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: 10px;
  margin-top: 4px;
}

.subdiv-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 6px 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.subdiv-tile:hover {
  border-color: var(--text-dim);
}

.subdiv-tile__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.subdiv-tile__icon {
  color: var(--text-dim);
  transition: color 0.15s ease;
}

.subdiv-tile__icon svg {
  display: block;
  width: 52px;
  height: auto;
}

.subdiv-tile__name {
  font-size: 0.72rem;
  text-align: center;
  color: var(--text-dim);
  line-height: 1.2;
}

.subdiv-tile__input:checked ~ .subdiv-tile__icon,
.subdiv-tile__input:checked ~ .subdiv-tile__name {
  color: var(--text);
}

.subdiv-tile:has(.subdiv-tile__input:checked) {
  background: rgba(110, 231, 183, 0.12);
  border-color: var(--accent-strong);
}

.subdiv-tile__input:focus-visible ~ .subdiv-tile__icon {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
  border-radius: 4px;
}

input[type="checkbox"] {
  accent-color: var(--accent-strong);
  width: 16px;
  height: 16px;
}

.hint {
  text-align: center;
  color: var(--danger);
  font-size: 0.85rem;
  min-height: 1.2em;
  margin: 0;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
  }
}