/* =====================================================
   NodeOSC — Panel & Oscillator Card Styles
   ===================================================== */

/* ---------- Generic Panel ---------- */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

.panel-header {
  background: var(--bg-panel2);
  border-bottom: 1px solid var(--border);
  padding: 0.45em 0.75em;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5em;
  flex-wrap: wrap;
  user-select: none;
}

.panel-body {
  padding: 0.65em 0.75em;
  display: flex;
  flex-direction: column;
  gap: 0.6em;
}

/* ---------- Oscillator card ---------- */
.osc-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s;
}

.osc-card.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent) inset;
}

.osc-card.muted {
  opacity: 0.45;
}

/* Card header */
.osc-header {
  background: var(--bg-panel2);
  border-bottom: 1px solid var(--border);
  padding: 0.4em 0.6em;
  display: flex;
  align-items: center;
  gap: 0.4em;
  flex-wrap: wrap;
}

.osc-name {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text);
  flex: 1;
  min-width: 60px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.osc-header-btns {
  display: flex;
  gap: 0.3em;
  flex-shrink: 0;
}

.btn-osc-mute, .btn-osc-solo, .btn-osc-remove {
  border: none;
  border-radius: 4px;
  padding: 0.2em 0.5em;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s, background 0.15s;
}
.btn-osc-mute   { background: var(--border);  color: var(--text-dim); }
.btn-osc-solo   { background: var(--border);  color: var(--text-dim); }
.btn-osc-remove { background: transparent;    color: var(--text-dim); }

.btn-osc-mute.on  { background: var(--accent2); color: #fff; }
.btn-osc-solo.on  { background: var(--accent3); color: #111; }
.btn-osc-remove:hover { color: var(--danger); }

/* Card body grid */
.osc-body {
  padding: 0.6em 0.7em;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6em;
  align-items: start;
}

/* Waveform picker */
.waveform-picker {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.35em;
  flex-wrap: wrap;
}

.wave-btn {
  flex: 1;
  min-width: 2.4em;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-dim);
  border-radius: 5px;
  padding: 0.3em 0.1em;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.wave-btn:hover { border-color: var(--accent); color: var(--accent); }
.wave-btn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Wave SVG previews in buttons */
.wave-btn svg {
  display: block;
  margin: 0 auto 1px;
  pointer-events: none;
}

/* Colour accent strip at top of card */
.osc-card::before {
  content: '';
  display: block;
  height: 3px;
  background: var(--osc-color, var(--accent));
  flex-shrink: 0;
}

/* ---------- Visualizer panel sizing ---------- */
.panel-visualizer .panel-header { flex-shrink: 0; }

.viz-controls {
  display: flex;
  gap: 0.3em;
}

.viz-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  border-radius: 4px;
  padding: 0.2em 0.55em;
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.viz-btn:hover, .viz-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---------- Section row (2-col grid in osc body) ---------- */
.osc-section-full { grid-column: 1 / -1; }

/* ---------- Oscillator colour palette ---------- */
.osc-card:nth-child(6n+1) { --osc-color: #5b8fff; }
.osc-card:nth-child(6n+2) { --osc-color: #a855f7; }
.osc-card:nth-child(6n+3) { --osc-color: #22d3a0; }
.osc-card:nth-child(6n+4) { --osc-color: #f59e0b; }
.osc-card:nth-child(6n+5) { --osc-color: #f43f5e; }
.osc-card:nth-child(6n+6) { --osc-color: #06b6d4; }

/* ---------- Empty state ---------- */
.osc-empty {
  grid-column: 1 / -1;
  padding: 2em;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  pointer-events: none;
}

/* =====================================================
   PIANO ROLL
   ===================================================== */

.panel-pianoroll {
  flex: 1;
  min-height: 0;
  display: flex;
}

/* Toolbar in panel header */
.pr-toolbar {
  display: flex;
  align-items: center;
  gap: 0.35em;
  flex-wrap: wrap;
}

.pr-select {
  width: auto;
  padding: 0.18em 0.4em;
  font-size: 0.72rem;
}

.pr-btn {
  padding: 0.18em 0.55em;
  font-size: 0.78rem;
  line-height: 1;
}

.pr-btn-danger:hover { color: var(--danger); border-color: var(--danger); }
.pr-btn.pr-active    { background: var(--accent2); border-color: var(--accent2); color: #fff; }

/* Roll body */
.pr-container {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* Left label column */
.pr-labels {
  width: 44px;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--bg-panel2);
  border-right: 1px solid var(--border);
  position: relative;
  display: flex;
  flex-direction: column;
  /* scrolled in sync with grid via JS */
}

.pr-key-label {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 5px;
  font-size: 0.6rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
  border-bottom: 1px solid transparent;
  flex-shrink: 0;
  user-select: none;
  cursor: pointer;
  transition: background 0.1s;
  box-sizing: border-box;
}
.pr-key-label:hover { background: rgba(91,143,255,0.15); color: var(--text); }
.pr-key-label.is-c  { color: var(--accent); border-bottom-color: var(--border); font-weight: 700; }
.pr-key-label.is-black { background: rgba(0,0,0,0.18); }
.pr-key-label.out-of-scale { opacity: 0.32; background: rgba(244,63,94,0.08); }
.pr-key-label.out-of-scale.is-black { background: rgba(244,63,94,0.14); }

/* Toolbar separator */
.pr-sep {
  display: inline-block;
  width: 1px;
  height: 1.1em;
  background: var(--border);
  flex-shrink: 0;
  align-self: center;
  margin: 0 0.1em;
}

/* Scroll wrapper for the canvas */
.pr-scroll-wrap {
  flex: 1;
  overflow: auto;
  position: relative;
  cursor: crosshair;
  background: #13161e; /* match canvas C_BG so area below canvas is seamless */
}

#pr-canvas {
  display: block;
  position: sticky;
  left: 0;
  /* width/height set by JS */
}

/* Playhead overlay (drawn on canvas, not a DOM element) */

/* ---- Velocity lane ---- */
.pr-vel-row {
  display: flex;
  flex-shrink: 0;
  min-height: 72px;
  border-top: 1px solid var(--border);
  background: #0e1018;
}

.pr-vel-label {
  width: 44px;
  flex-shrink: 0;
  background: var(--bg-panel2);
  border-right: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  text-transform: uppercase;
  user-select: none;
}

.pr-vel-scroll {
  flex: 1;
  overflow-x: auto;
  overflow-y: hidden;
  cursor: ns-resize;
  background: #0e1018;
}

#pr-vel-canvas {
  display: block;
}

/* ---- Note inspector bar ---- */
.pr-inspector {
  align-items: center;
  gap: 1em;
  padding: 0.28em 0.75em;
  background: var(--bg-panel2);
  border-bottom: 1px solid var(--border);
  font-size: 0.72rem;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.pr-insp-count {
  color: var(--text-dim);
  min-width: 3.5em;
  font-variant-numeric: tabular-nums;
}

.pr-insp-field {
  display: flex;
  align-items: center;
  gap: 0.35em;
  cursor: default;
}

.pr-insp-lbl {
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  font-size: 0.65rem;
  text-transform: uppercase;
}

.pr-insp-note-name {
  color: var(--accent);
  font-weight: 600;
  min-width: 2.6em;
  font-variant-numeric: tabular-nums;
}

.pr-insp-num {
  width: 4.8em;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 0.72rem;
  padding: 0.15em 0.35em;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.pr-insp-num:focus { outline: none; border-color: var(--accent); }
.pr-insp-num::-webkit-inner-spin-button,
.pr-insp-num::-webkit-outer-spin-button { -webkit-appearance: none; }
.pr-insp-num[type=number] { -moz-appearance: textfield; }

/* ---- Custom waveform editor ---- */
.custom-wave-editor {
  display: none;
  padding: 0.35em 0 0.25em;
}

.custom-wave-canvas {
  display: block;
  width: 100%;
  height: 72px;
  border: 1px solid var(--border);
  border-radius: 3px;
  cursor: crosshair;
  box-sizing: border-box;
  touch-action: none;
}

.custom-wave-presets {
  display: flex;
  gap: 0.25em;
  margin-top: 0.3em;
}

.cwp-btn {
  flex: 1;
  padding: 0.12em 0.3em;
  font-size: 0.68rem;
}