/* ─── CIRCLE OF FIFTHS OSCILLATOR ─── */
:root {
  --cof-surface: #1A1715;
  --cof-surface2: #221E1B;
  --cof-border: rgba(153, 153, 153, 0.2);
  --cof-text: #fff;
  --cof-text-dim: #666;
  --cof-text-mid: #999;
}

.cof-app {
  max-width: 680px;
  margin: 0 auto;
}

/* ─── CANVAS ─── */
.cof-canvas-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: calc(var(--unit) * 4);
}

#cofCanvas {
  width: 100%;
  max-width: 500px;
  height: auto;
}

/* ─── CONTROLS ─── */
.cof-controls {
  background: var(--cof-surface);
  border: 1px solid var(--cof-border);
  border-radius: calc(var(--unit) * 0.5);
  padding: calc(var(--unit) * 3) calc(var(--unit) * 4);
  margin-bottom: calc(var(--unit) * 3);
}

.control-row {
  display: flex;
  align-items: center;
  gap: calc(var(--unit) * 2);
  margin-bottom: calc(var(--unit) * 2);
}

.control-label {
  font-size: calc(var(--unit) * 1.5);
  color: var(--cof-text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  min-width: 90px;
  flex-shrink: 0;
}

.control-value {
  font-size: calc(var(--unit) * 1.75);
  color: var(--cof-text);
  min-width: 100px;
  text-align: right;
  white-space: nowrap;
}

.cof-app input[type=range] {
  -webkit-appearance: none;
  flex: 1;
  height: 2px;
  background: var(--cof-border);
  border-radius: 1px;
  outline: none;
}

.cof-app input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cof-text);
  cursor: pointer;
}

.cof-app input[type=range]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cof-text);
  cursor: pointer;
  border: none;
}

/* ─── INTERVAL SLIDER WITH TICKS ─── */
.slider-ticks {
  flex: 1;
  position: relative;
  padding: 12px 0;
}

.slider-ticks input[type=range] {
  width: 100%;
  margin: 0;
  position: relative;
  z-index: 1;
}

.slider-ticks .tick-marks {
  position: absolute;
  top: 50%;
  left: 7px;
  right: 7px;
  transform: translateY(-50%);
  height: 12px;
  pointer-events: none;
}

.slider-ticks .tick {
  width: 1px;
  height: 100%;
  background: rgba(255, 255, 255, 0.15);
  position: absolute;
  top: 0;
}

.cof-app select {
  -webkit-appearance: none;
  appearance: none;
  background: var(--cof-surface2);
  color: var(--cof-text);
  border: 1px solid var(--cof-border);
  border-radius: calc(var(--unit) * 0.5);
  padding: calc(var(--unit) * 0.75) calc(var(--unit) * 2) calc(var(--unit) * 0.75) calc(var(--unit) * 1.5);
  font-family: "Satoshi", sans-serif;
  font-size: calc(var(--unit) * 1.75);
  cursor: pointer;
  outline: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5'%3E%3Cpath d='M0 0l4 5 4-5z' fill='%23999'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: calc(var(--unit) * 3);
}

.cof-app select:hover {
  border-color: var(--cof-text-mid);
}

/* ─── INFO ROW ─── */
.cof-info-row {
  display: flex;
  gap: calc(var(--unit) * 3);
  padding: calc(var(--unit) * 2) 0;
  margin-bottom: calc(var(--unit) * 2);
  border-top: 1px solid var(--cof-border);
  border-bottom: 1px solid var(--cof-border);
}

.info-item {
  font-size: calc(var(--unit) * 1.375);
  color: var(--cof-text-dim);
  letter-spacing: 0.03em;
}

.info-item strong {
  color: var(--cof-text);
  font-weight: 600;
}

/* ─── BUTTONS ─── */
.cof-buttons {
  display: flex;
  gap: calc(var(--unit) * 1.25);
}

.cof-buttons button {
  font-family: "Satoshi", sans-serif;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  border-radius: calc(var(--unit) * 0.5);
  cursor: pointer;
  transition: all 0.15s;
}

.cof-buttons .btn-primary {
  background: var(--cof-text);
  color: var(--backgroundColor);
  font-size: calc(var(--unit) * 1.75);
  padding: calc(var(--unit) * 1.5) calc(var(--unit) * 4);
}
.cof-buttons .btn-primary:hover { background: var(--cof-text-mid); }

.cof-buttons .btn-secondary {
  background: transparent;
  color: var(--cof-text-mid);
  font-size: calc(var(--unit) * 1.5);
  padding: calc(var(--unit) * 1.5) calc(var(--unit) * 2.5);
  border: 1px solid var(--cof-border) !important;
}
.cof-buttons .btn-secondary:hover:not(:disabled) {
  border-color: var(--cof-text-mid) !important;
  color: var(--cof-text);
}
.cof-buttons .btn-secondary:disabled {
  opacity: 0.25;
  cursor: default;
}
.cof-buttons .btn-secondary.active {
  border-color: var(--cof-text) !important;
  color: var(--cof-text);
  background: rgba(255, 255, 255, 0.08);
}

/* ─── SEQUENCE DISPLAY ─── */
.cof-sequence {
  display: flex;
  flex-direction: column;
  gap: calc(var(--unit) * 0.75);
  min-height: calc(var(--unit) * 4);
}

.seq-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: calc(var(--unit) * 0.75);
}

.seq-beam-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.seq-note {
  font-family: "Satoshi", sans-serif;
  font-weight: 600;
  font-size: calc(var(--unit) * 1.75);
  color: var(--cof-text-mid);
  background: var(--cof-surface);
  border: 1px solid var(--cof-border);
  border-radius: calc(var(--unit) * 0.25);
  padding: calc(var(--unit) * 0.5) calc(var(--unit) * 1.25);
  transition: all 0.2s;
}

.seq-note.active {
  color: var(--cof-text);
  border-color: var(--cof-text-mid);
  background: var(--cof-surface2);
}

.seq-arrow {
  color: var(--cof-text-dim);
  font-size: calc(var(--unit) * 1.5);
  display: flex;
  align-items: center;
}

/* ─── RESPONSIVE ─── */
@media screen and (max-width: 600px) {
  .cof-controls {
    padding: calc(var(--unit) * 2.5) calc(var(--unit) * 2.5);
  }

  .control-row {
    flex-wrap: wrap;
    gap: calc(var(--unit) * 1);
  }

  .control-label {
    min-width: auto;
    width: 100%;
  }

  .control-value {
    text-align: left;
    min-width: auto;
  }

  .cof-info-row {
    flex-wrap: wrap;
    gap: calc(var(--unit) * 1.5);
  }
}