body {
  margin: 0;
  background: #fff;
  color: #111;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Courier New", monospace;
  font-size: 1rem;
  line-height: 1.6;
}

main {
  padding: 2rem 0 2rem 8rem;
}

p {
  margin: 0 0 1rem;
}

a {
  color: inherit;
}

/* boxes */

.box {
  border: 1px solid #111;
  padding: 1rem 1.5rem;
  width: fit-content;
}

.section-label {
  font-size: 0.75rem;
  font-weight: normal;
  text-transform: lowercase;
  letter-spacing: 0.15em;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #111;
}

/* top layout */

.page {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
}

.layout {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  width: fit-content;
  gap: 2rem;
}

.control-row {
  display: flex;
  gap: 2rem;
  align-items: stretch;
  justify-content: flex-end;
}

.keyboard-box {
  width: auto;
}

/* synth */

.synth-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.synth-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.synth-section h3 {
  font-size: 0.7rem;
  font-weight: normal;
  text-transform: lowercase;
  letter-spacing: 0.1em;
  margin: 0;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid #111;
  width: 100%;
  text-align: center;
}

.vco-controls {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.slider-group {
  display: flex;
  gap: 0.75rem;
}

.slider-control {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.slider-control input[type="range"] {
  writing-mode: vertical-lr;
  direction: rtl;
  width: 4px;
  height: 80px;
  accent-color: #111;
}

.slider-control label {
  font-size: 0.65rem;
}

.master .slider-control {
  width: 3.75rem;
}

.waveform-select,
.octave-select {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.7rem;
}

#lfo-dest,
#lfo-dest-2,
#seq-div,
#seq-div-2 {
  font-family: inherit;
  font-size: 0.7rem;
  background: #fff;
  color: #111;
  border: 1px solid #111;
}

.select-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
}

.sync-toggle,
.voice-select {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.65rem;
  cursor: pointer;
}

.sync-toggle input,
.voice-select input {
  accent-color: #111;
  cursor: pointer;
}

.seq-buttons {
  display: flex;
  gap: 0.5rem;
}

.seq-buttons button {
  font-family: inherit;
  font-size: 0.7rem;
  background: #fff;
  color: #111;
  border: 1px solid #111;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
}

.seq-buttons button.active {
  background: #111;
  color: #fff;
}

.seq-steps {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.seq-steps-row {
  display: flex;
  gap: 0.2rem;
}

.seq-step {
  width: 0.5rem;
  height: 0.5rem;
  border: 1px solid #111;
}

.seq-step.has-note {
  background: #ccc;
}

.seq-step.current {
  background: #111;
}

.seq-step.current.has-note {
  background: #111;
}

/* keyboard */

.keyboard-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  font-size: 0.7rem;
}

.keyboard-controls button {
  font-family: inherit;
  font-size: 0.7rem;
  background: #fff;
  color: #111;
  border: 1px solid #111;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
}

.voice-controls {
  display: flex;
  gap: 0.5rem;
  width: fit-content;
}

.voice-controls button {
  font-family: inherit;
  font-size: 0.7rem;
  background: #fff;
  color: #111;
  border: 1px solid #111;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  min-width: 1.6rem;
}

.voice-select-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: 1rem;
}

.synth-keyboard {
  display: flex;
  width: 100%;
  user-select: none;
}

.key {
  border: 1px solid #111;
  height: 6rem;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  font-size: 0.7rem;
  padding-bottom: 0.4rem;
  cursor: pointer;
  background: #fff;
  color: #111;
}

.key.white {
  flex: 1 1 0;
}

.key.black {
  flex: 0 0 auto;
  width: 1.6rem;
  height: 3.5rem;
  margin: 0 -0.8rem;
  background: #111;
  color: #fff;
  position: relative;
  z-index: 1;
}

.key.active {
  background: #111;
  color: #fff;
}

.key.black.active {
  background: #555;
}

/* clock */

.clock-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.clock-header button {
  font-family: inherit;
  font-size: 0.7rem;
  background: #fff;
  color: #111;
  border: 1px solid #111;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
}

.clock-header button.active {
  background: #111;
  color: #fff;
}

/* drum machine */

.drum-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.drum-header button {
  font-family: inherit;
  font-size: 0.7rem;
  background: #fff;
  color: #111;
  border: 1px solid #111;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
}

.drum-header button.active {
  background: #111;
  color: #fff;
}

.drum-header .slider-control {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}

.drum-header .slider-control input[type="range"] {
  writing-mode: horizontal-tb;
  direction: rtl;
  width: 80px;
  height: auto;
  accent-color: #111;
}

.drum-header .slider-control label {
  font-size: 0.65rem;
}

.drum-grid {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

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

.drum-label {
  width: 2.5rem;
  font-size: 0.7rem;
  text-transform: lowercase;
}

.drum-steps {
  display: flex;
  gap: 0.3rem;
}

.drum-step {
  width: 1.1rem;
  height: 1.1rem;
  border: 1px solid #111;
  cursor: pointer;
  background: #fff;
}

.drum-step.group-end {
  margin-right: 0.4rem;
}

.drum-step.on {
  background: #ccc;
}

.drum-step.current {
  border-color: #111;
  border-width: 2px;
}

.drum-step.current.on {
  background: #111;
}