.sonata-page {
  --sonata-panel: rgba(5, 5, 5, .84);
  --sonata-line: #292929;
  --sonata-bright: #f4f4f2;
  background: #000;
}

.sonata-page::before {
  background:
    radial-gradient(circle at 73% 18%, rgba(255,255,255,.075), transparent 24rem),
    radial-gradient(circle at 22% 82%, rgba(255,255,255,.035), transparent 28rem),
    #000;
}

.sonata-header { position: relative; z-index: 3; }

.sonata-main { min-height: 46rem; }

.sonata {
  padding-top: clamp(3.5rem, 7vw, 6.5rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.sonata__heading { margin-bottom: clamp(2.5rem, 5vw, 4.25rem); }

.sonata__heading h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 7.3rem);
  font-weight: 400;
  line-height: 1;
  letter-spacing: .22em;
  text-shadow: 0 0 14px rgba(255,255,255,.28);
}

.sonata__heading > p:last-child {
  margin: 1.4rem 0 0;
  color: var(--soft);
  font-size: clamp(.8rem, 1.2vw, .95rem);
  line-height: 1.7;
}

.sonata-workspace {
  display: grid;
  grid-template-columns: minmax(14.5rem, 17rem) minmax(0, 1fr);
  gap: 1rem;
  align-items: stretch;
}

.sonata-controls,
.sonata-stage {
  border: 1px solid var(--sonata-line);
  background: var(--sonata-panel);
}

.sonata-controls {
  display: flex;
  flex-direction: column;
  padding: 1.35rem;
}

.control-section {
  margin: 0;
  padding: 0 0 1.45rem;
  border: 0;
  border-bottom: 1px solid #1c1c1c;
}

.control-section + .control-section { padding-top: 1.45rem; }
.control-section:last-child { padding-bottom: 0; border-bottom: 0; }

.control-section h2,
.control-section legend {
  margin: 0 0 .9rem;
  padding: 0;
  color: #a8a8a8;
  font-size: .63rem;
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: .24em;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .55rem;
}

.control-button,
.voice-button,
.play-button,
.rewind-button {
  border: 1px solid #303030;
  border-radius: 1px;
  background: #050505;
  color: #a9a9a9;
  font: inherit;
  cursor: pointer;
  transition: border-color 150ms ease, color 150ms ease, background-color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.control-button {
  min-height: 2.7rem;
  padding: .7rem .55rem;
  font-size: .62rem;
  letter-spacing: .13em;
}

.control-button--wide { grid-column: 1 / -1; }

.control-button:hover,
.control-button:focus-visible,
.voice-button:hover,
.voice-button:focus-visible,
.rewind-button:hover,
.rewind-button:focus-visible {
  border-color: #777;
  color: #fff;
}

.control-button.is-active,
.voice-button.is-active {
  border-color: #d8d8d8;
  background: #f1f1ef;
  color: #050505;
  box-shadow: 0 0 12px rgba(255,255,255,.12);
}

.control-button:active,
.voice-button:active,
.play-button:active,
.rewind-button:active { transform: translateY(1px); }

.voice-grid { display: grid; gap: .5rem; }

.voice-button {
  min-height: 2.65rem;
  display: grid;
  grid-template-columns: 3rem 1fr;
  align-items: center;
  gap: .7rem;
  padding: .55rem .7rem;
  text-align: left;
  font-size: .63rem;
  letter-spacing: .14em;
}

.voice-mark {
  position: relative;
  display: block;
  width: 2.7rem;
  height: 1rem;
}

.voice-mark::before,
.voice-mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  border-top: 1px solid currentColor;
}

.voice-mark--orbit::after { transform: translateY(-4px); border-radius: 50%; }
.voice-mark--pulse::before { transform: skewY(-25deg); }
.voice-mark--glass::before { border-top-style: double; border-top-width: 3px; }
.voice-mark--drift::before { border-top-style: dashed; }
.voice-mark--bass::before { border-top-width: 3px; }

.tempo-section { margin-top: auto; }

.tempo-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.tempo-heading h2 { margin-bottom: .65rem; }

#tempo-output {
  color: #d0d0d0;
  font-size: .63rem;
  letter-spacing: .1em;
}

#tempo-control {
  width: 100%;
  height: 1.5rem;
  margin: 0;
  accent-color: #f4f4f2;
  cursor: pointer;
}

.sonata-stage {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: clamp(.8rem, 1.8vw, 1.3rem);
}

.stage-meta {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: .75rem;
  color: #777;
  font-size: clamp(.52rem, .8vw, .61rem);
  line-height: 1.5;
  letter-spacing: .12em;
}

.canvas-wrap {
  position: relative;
  min-height: 24rem;
  flex: 1;
  overflow: hidden;
  border: 1px solid #303030;
  background: #020202;
  box-shadow: inset 0 0 50px rgba(255,255,255,.018);
}

#sonata-canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 24rem;
  touch-action: none;
  cursor: crosshair;
  user-select: none;
}

#sonata-canvas.is-erasing { cursor: cell; }

.canvas-hint {
  position: absolute;
  inset: 50% auto auto 50%;
  margin: 0;
  color: #555;
  font-size: clamp(.63rem, 1vw, .75rem);
  line-height: 1.5;
  letter-spacing: .24em;
  transform: translate(-50%, -50%);
  pointer-events: none;
  white-space: nowrap;
}

.canvas-hint[hidden] { display: none; }

.transport {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: .7rem;
  padding-top: .85rem;
}

.play-button,
.rewind-button {
  min-height: 3rem;
  padding: .75rem 1rem;
  color: #e8e8e6;
  font-size: .65rem;
  letter-spacing: .16em;
}

.play-button {
  min-width: 7.5rem;
  border-color: #777;
}

.play-button:hover,
.play-button:focus-visible,
.play-button.is-playing {
  border-color: #fff;
  box-shadow: 0 0 14px rgba(255,255,255,.12);
}

.play-symbol { display: inline-block; width: 1.4rem; }

.rewind-button { color: #999; }

.transport-status {
  justify-self: end;
  margin: 0;
  color: #6f6f6f;
  font-size: .59rem;
  letter-spacing: .14em;
  text-align: right;
}

.sonata-instructions,
.sonata-noscript {
  max-width: 56rem;
  margin: 1.25rem 0 0;
  color: #777;
  font-size: .68rem;
  line-height: 1.75;
}

@media (max-width: 900px) {
  .sonata-workspace { grid-template-columns: 1fr; }
  .sonata-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.2rem;
  }
  .control-section,
  .control-section + .control-section {
    padding: 0;
    border-bottom: 0;
  }
  .tempo-section { grid-column: 1 / -1; }
  .voice-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .voice-button {
    min-height: 4.6rem;
    grid-template-columns: 1fr;
    justify-items: center;
    gap: .45rem;
    padding: .55rem .3rem;
    text-align: center;
  }
  .canvas-wrap,
  #sonata-canvas { min-height: 22rem; }
}

@media (max-width: 580px) {
  .sonata { padding-top: 3rem; }
  .sonata__heading h1 { font-size: clamp(2.6rem, 16vw, 4rem); letter-spacing: .14em; }
  .sonata-controls { display: block; }
  .control-section + .control-section { padding-top: 1.35rem; }
  .control-section { padding-bottom: 1.35rem; border-bottom: 1px solid #1c1c1c; }
  .control-section:last-child { padding-bottom: 0; border-bottom: 0; }
  .voice-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .voice-button {
    min-height: 2.8rem;
    grid-template-columns: 2.7rem 1fr;
    justify-items: stretch;
    text-align: left;
  }
  .stage-meta { align-items: flex-start; flex-direction: column; gap: .25rem; }
  .canvas-wrap,
  #sonata-canvas { min-height: 19rem; }
  .transport { grid-template-columns: 1fr 1fr; }
  .play-button,
  .rewind-button { width: 100%; min-width: 0; padding-inline: .65rem; }
  .transport-status { grid-column: 1 / -1; justify-self: start; padding-top: .25rem; text-align: left; }
  .canvas-hint { font-size: .58rem; letter-spacing: .15em; }
}

@media (prefers-reduced-motion: reduce) {
  .control-button,
  .voice-button,
  .play-button,
  .rewind-button { transition: none; }
}