:root {
  --ide-accent: #8e24aa;
  --ide-accent-strong: #6a1b9a;
  --ide-bg-soft: #f7f3fb;
  --ide-border: #e6dbef;
  --ide-text: #2a2233;
  --ide-muted: #746b7e;
  --ide-success: #15803d;
  --ide-warning: #b45309;
  --ide-danger: #b91c1c;
  --ide-radius-sm: 8px;
  --ide-radius-md: 12px;
  --ide-space-1: 4px;
  --ide-space-2: 8px;
  --ide-space-3: 12px;
  --ide-space-4: 16px;
  --header-control-height: 36px;
}

#header.header-modern #sideSerialControls {
  gap: var(--ide-space-2);
}

#header.header-modern #sideSerialControls > button,
#header.header-modern #sideSerialControls > select,
#header.header-modern #sideSerialControls .mode-dropdown-toggle {
  border-radius: var(--ide-radius-md);
  height: var(--header-control-height) !important;
  min-height: 34px !important;
  font-weight: 600;
  font-size: 13px !important;
  line-height: 1;
  padding-left: 12px !important;
  padding-right: 12px !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
}

@media (max-width: 1280px) {
  :root {
    --header-control-height: 32px;
  }
}

#header.header-modern #side_btn_upload {
  background: var(--ide-accent) !important;
  border-color: rgba(255, 255, 255, 0.35) !important;
  color: #fff !important;
}

#header.header-modern #side_btn_upload:hover,
#header.header-modern #side_btn_upload:focus {
  background: var(--ide-accent-strong) !important;
  color: #fff !important;
}

.ide-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 0 10px;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.ide-status-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #cbd5e1;
}

.ide-status-badge[data-status="connected"]::before {
  background: #22c55e;
}

.ide-status-badge[data-status="busy"]::before {
  background: #f59e0b;
}

.ide-status-badge[data-status="disconnected"]::before {
  background: #ef4444;
}

#sidePreview {
  background: #fcfafe;
  border-left: 1px solid var(--ide-border);
}

.ide-onboarding-card {
  margin: 10px 10px 8px;
  padding: 10px 12px;
  border: 1px solid var(--ide-border);
  border-radius: var(--ide-radius-md);
  background: #fff;
}

.ide-onboarding-title {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ide-text);
}

.ide-onboarding-steps {
  margin: 0;
  padding-left: 18px;
}

.ide-onboarding-steps li {
  color: var(--ide-muted);
  font-size: 12px;
  line-height: 1.4;
  margin-bottom: 4px;
}

.ide-onboarding-steps li.is-complete {
  color: var(--ide-success);
  font-weight: 600;
}

.ide-onboarding-steps li.is-complete::marker {
  content: "✓ ";
}

.serial-tabs {
  margin: 8px 10px 0 !important;
  padding: 4px !important;
  border: 1px solid var(--ide-border);
  border-bottom: 0;
  border-radius: var(--ide-radius-md) var(--ide-radius-md) 0 0 !important;
  background: #f3edf8 !important;
}

.serial-tab-btn {
  border-radius: 10px !important;
  background: transparent !important;
  color: #584e63 !important;
  font-weight: 600 !important;
}

.serial-tab-btn.active {
  background: #fff !important;
  color: var(--ide-accent-strong) !important;
}

#messagesMonitor,
#serialMonitor {
  margin: 0 10px 10px !important;
  border: 1px solid var(--ide-border) !important;
  border-top: 0 !important;
  border-radius: 0 0 var(--ide-radius-md) var(--ide-radius-md) !important;
  background: #fff !important;
}

#serialMonitor {
  padding: 10px !important;
}

#messagesOutput,
#serialOutput {
  border: 1px solid #e8e1ef !important;
  border-radius: var(--ide-radius-sm) !important;
  background: #fff !important;
}

#messagesOutput:empty::before,
#serialOutput:empty::before {
  content: attr(data-empty-hint);
  color: #9a8fa7;
  font-style: italic;
}

.serial-monitor-top {
  justify-content: space-between !important;
  gap: 8px !important;
}

.serial-monitor-bottom {
  gap: 0 !important;
}

.serial-input {
  border-radius: 10px 0 0 10px !important;
}

.serial-btn-send {
  border-radius: 0 10px 10px 0 !important;
}

@media (max-width: 1024px) {
  .ide-status-badge {
    display: none;
  }

  .ide-onboarding-card {
    margin: 8px;
    padding: 8px 10px;
  }

  .ide-onboarding-steps li {
    font-size: 11px;
  }
}

/* Left toolbox readability and density polish (non-breaking overrides) */
.blocklyToolboxDiv {
  background: #f1f1f3 !important;
  border-right: 1px solid #d9d9df !important;
  box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.45), 2px 0 10px rgba(0, 0, 0, 0.08) !important;
}

.blocklyTreeRow {
  height: 70px !important;
  margin: 3px 6px !important;
  width: calc(100% - 12px) !important;
  padding: 6px 4px !important;
  border-radius: 10px !important;
  border: 1px solid transparent !important;
}

.blocklyTreeRow::before {
  width: 30px !important;
  height: 30px !important;
  margin-bottom: 5px !important;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2) !important;
}

.blocklyTreeRow:hover {
  background: #ffffff !important;
  border-color: #ddd5e7 !important;
}

.blocklyTreeRow:hover::before {
  transform: translateY(-1px) scale(1.08) !important;
}

.blocklyTreeSelected .blocklyTreeRow,
.blocklyTreeRow.blocklyTreeSelected {
  background: #f3ecfa !important;
  border-color: #ceb8e7 !important;
}

.blocklyTreeSelected .blocklyTreeRow::before,
.blocklyTreeRow.blocklyTreeSelected::before {
  box-shadow: 0 0 0 2px rgba(142, 36, 170, 0.2), 0 2px 7px rgba(0, 0, 0, 0.22) !important;
}

.blocklyTreeLabel {
  font-size: 10px !important;
  line-height: 1.2 !important;
  max-width: 100%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #2d2a34 !important;
  letter-spacing: 0.15px !important;
}

.blocklyTreeRow:focus,
.blocklyTreeRow:focus-visible {
  outline: 2px solid rgba(142, 36, 170, 0.45) !important;
  outline-offset: 1px !important;
}

.blocklyFlyoutBackground {
  fill: #ffffff !important;
  fill-opacity: 1 !important;
}

@media (max-width: 1400px) {
  .blocklyToolboxDiv {
    width: 84px !important;
    min-width: 84px !important;
  }

  .blocklyTreeRow {
    height: 64px !important;
    margin: 2px 5px !important;
    width: calc(100% - 10px) !important;
  }

  .blocklyTreeRow::before {
    width: 27px !important;
    height: 27px !important;
  }

  .blocklyTreeLabel {
    font-size: 9px !important;
  }
}

@media (max-height: 760px) {
  .blocklyTreeRow {
    height: 60px !important;
    padding: 5px 3px !important;
  }

  .blocklyTreeRow::before {
    width: 24px !important;
    height: 24px !important;
    margin-bottom: 3px !important;
  }

  .blocklyTreeLabel {
    font-size: 8.5px !important;
  }
}