/* ── Oscilloscope panel ─────────────────────────────────────────────────── */

.osc-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #1e1e1e;
  border-top: 1px solid #333;
  font-family: 'Consolas', 'Menlo', monospace;
  font-size: 12px;
  color: #ccc;
  overflow: hidden;
}

/* ── Header ── */
.osc-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  background: #252526;
  border-bottom: 1px solid #333;
  flex-shrink: 0;
  flex-wrap: wrap;
  min-height: 32px;
}

.osc-title {
  color: #cccccc;
  font-weight: 600;
  font-size: 12px;
  white-space: nowrap;
  margin-right: 4px;
}

.osc-btn {
  background: transparent;
  border: 1px solid #555;
  color: #ccc;
  padding: 2px 8px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
  white-space: nowrap;
  transition: border-color 0.15s, background 0.15s;
}

.osc-btn:hover {
  border-color: #007acc;
  color: #fff;
}

.osc-btn-active {
  background: #0e3a5a;
  border-color: #007acc;
  color: #4fc3f7;
}

.osc-btn-danger {
  border-color: #7a0000;
  color: #ff6b6b;
}

.osc-btn-danger:hover {
  background: #3a0000;
  border-color: #ff6b6b;
}

.osc-label {
  color: #888;
  font-size: 11px;
  white-space: nowrap;
}

.osc-select {
  background: #1e1e1e;
  border: 1px solid #444;
  color: #ccc;
  padding: 2px 4px;
  border-radius: 3px;
  font-size: 11px;
  outline: none;
  cursor: pointer;
}

.osc-select:focus {
  border-color: #007acc;
}

/* ── Channel picker dropdown ── */
.osc-picker-wrap {
  position: relative;
}

.osc-picker-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 200;
  background: #252526;
  border: 1px solid #555;
  border-radius: 4px;
  padding: 4px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3px;
  min-width: 200px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

.osc-pin-btn {
  background: #2d2d2d;
  border: 1px solid #444;
  color: #ccc;
  padding: 3px 6px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
  text-align: center;
  transition: background 0.1s, border-color 0.1s;
}

.osc-pin-btn:hover {
  background: #0e3a5a;
  border-color: #007acc;
  color: #fff;
}

.osc-pin-btn-active {
  background: #1a3a1a;
  border-color: #00ff41;
  color: #00ff41;
  cursor: default;
}

/* ── Waveform area ── */
.osc-waveforms {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  background: #0a0a0a;
}

.osc-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: #555;
  font-size: 12px;
  flex-direction: column;
  gap: 8px;
}

.osc-channel-row {
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid #1a1a1a;
  height: 60px;
}

.osc-channel-label {
  width: 56px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4px 6px;
  background: #141414;
  border-right: 1px solid #222;
  gap: 4px;
}

.osc-channel-name {
  font-size: 11px;
  font-weight: 700;
}

.osc-channel-remove {
  background: transparent;
  border: none;
  color: #555;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  padding: 0;
  transition: color 0.1s;
}

.osc-channel-remove:hover {
  color: #ff6b6b;
}

.osc-channel-canvas-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.osc-channel-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* ── Time ruler ── */
.osc-ruler {
  height: 20px;
  flex-shrink: 0;
  background: #141414;
  border-top: 1px solid #222;
  position: relative;
}

.osc-ruler-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
