:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --accent: #e94560;
  --accent-hover: #ff6b81;
  --text-primary: #eaeaea;
  --text-secondary: #8b8b9e;
  --border: #2d2d44;
  --success: #16c79a;
  --warning: #f5a623;
  --danger: #e94560;
  --side-A: #e94560;
  --side-B: #5fa8ff;
  --pane-A-bg: #1d1320;
  --pane-B-bg: #131a24;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
}

#app { display: flex; flex-direction: column; height: 100vh; }

#topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.topbar-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.status {
  font-size: 12px;
  color: var(--text-secondary);
  margin-left: auto;
}
.status.ready { color: var(--success); }
.status.error { color: var(--danger); }

#main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.panel {
  flex: 1;
  background: var(--bg-secondary);
  overflow-y: auto;
  min-width: 0;
}
#left-pane { background: var(--pane-A-bg); border-right: 1px solid var(--border); }
#left-pane h3 { color: var(--side-A); }
#right-pane { background: var(--pane-B-bg); border-left: 1px solid var(--border); }
#right-pane h3 { color: var(--side-B); }
#center-pane { max-width: 360px; }

.panel-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.panel-section h3 {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

#status-bar {
  flex-shrink: 0;
  padding: 6px 16px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-secondary);
}

/* Param sliders */
.param-group {
  margin-bottom: 12px;
}
.param-label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 4px;
}
.param-label-row label {
  font-size: 12px;
  color: var(--text-primary);
}
.param-value {
  font-family: 'SF Mono', Menlo, monospace;
  font-size: 11px;
  color: var(--text-secondary);
}
.param-slider {
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-tertiary);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}
.param-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.param-slider::-webkit-slider-thumb:hover { background: var(--accent-hover); transform: scale(1.1); }
.param-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 0;
  cursor: pointer;
}

/* Side-A / Side-B color tinting on slider thumbs */
#param-A .param-slider::-webkit-slider-thumb { background: var(--side-A); }
#param-A .param-slider::-moz-range-thumb { background: var(--side-A); }
#param-B .param-slider::-webkit-slider-thumb { background: var(--side-B); }
#param-B .param-slider::-moz-range-thumb { background: var(--side-B); }

/* Buttons */
.btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  transition: background 0.2s;
  white-space: nowrap;
}
.btn:hover { background: var(--border); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-success {
  background: var(--success);
  border-color: var(--success);
  color: white;
}
.btn-warn {
  background: var(--warning);
  border-color: var(--warning);
  color: var(--bg-primary);
}
.btn-save-confirm {
  background: var(--warning);
  border-color: var(--warning);
  color: var(--bg-primary);
}

/* Preset manager */
.preset-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.preset-title-row h3 { margin: 0; }
.preset-dirty-badge {
  font-size: 10px;
  color: var(--warning);
}
.preset-row {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
}
.preset-select,
.preset-name-input {
  flex: 1;
  padding: 6px 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 4px;
  font-size: 12px;
}

/* Contact controls */
.contact-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}
.contact-row .btn { flex-shrink: 0; }
.gate-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}
.gate-toggle input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.section-divider {
  height: 1px;
  background: var(--border);
  margin: 12px 0;
}

.value-readout {
  font-family: 'SF Mono', Menlo, monospace;
  font-size: 10px;
  color: var(--text-secondary);
  padding: 4px 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  display: inline-block;
}