:root {
  --color-page: #edf4fb;
  --color-shell: #f7fbff;
  --color-surface: #ffffff;
  --color-surface-raised: #fbfdff;
  --color-ink: #12213d;
  --color-muted: #5d6d82;
  --color-primary: #0068ff;
  --color-primary-hover: #0052cc;
  --color-topbar: #12325f;
  --color-topbar-2: #0b2447;
  --color-accent: #00a6a6;
  --color-warning: #f3b833;
  --color-border: #cbd9ea;
  --color-border-strong: #91a9c9;
  --color-code-bg: #0d1c34;
  --color-code-text: #dbeafe;
  --category-start: #0078d4;
  --category-logic: #7b3fb2;
  --category-pins: #00a4a6;
  --category-time: #f9a825;
  --category-text: #d83bb3;
  --category-numbers: #e66a00;
  --shadow-panel: 0 10px 24px rgba(18, 33, 61, 0.1);
  --shadow-control: 0 2px 4px rgba(18, 33, 61, 0.12);
  --radius-sm: 6px;
  --radius-md: 8px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --topbar-height: 76px;
  --font-body: Inter, Segoe UI, Roboto, Arial, sans-serif;
  --font-code: Consolas, Monaco, "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  min-width: 1024px;
  color: var(--color-ink);
  background: var(--color-page);
  font-family: var(--font-body);
}

button,
pre {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-rows: var(--topbar-height) minmax(0, 1fr);
  min-height: 100vh;
  background: var(--color-shell);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--topbar-height);
  padding: 0 var(--space-6);
  color: #ffffff;
  background: var(--color-topbar);
  border-bottom: 4px solid var(--color-accent);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: #ffffff;
  background: var(--color-primary);
  border: 2px solid #9ed0ff;
  border-radius: var(--radius-md);
  font-weight: 800;
  box-shadow: var(--shadow-control);
}

.topbar h1,
.topbar p {
  margin: 0;
}

.topbar h1 {
  font-size: 23px;
  line-height: 1.15;
}

.eyebrow,
.panel-kicker {
  margin: 0;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow {
  color: #b8dcff;
}

.panel-kicker {
  color: var(--color-muted);
}

.actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.connection-pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 var(--space-3);
  color: #dcecff;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 700;
}

.button {
  min-height: 40px;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  padding: 0 var(--space-4);
  font-weight: 800;
  cursor: pointer;
  box-shadow: var(--shadow-control);
}

.button-small {
  min-height: 34px;
  padding: 0 var(--space-3);
}

.button:focus-visible,
.tab:focus-visible,
.category-button:focus-visible {
  outline: 3px solid var(--color-warning);
  outline-offset: 2px;
}

.button:disabled,
.tab:disabled {
  cursor: not-allowed;
  opacity: 0.64;
  box-shadow: none;
}

.button-primary {
  color: #ffffff;
  background: var(--color-primary);
}

.button-primary:not(:disabled):hover {
  background: var(--color-primary-hover);
}

.button-secondary {
  color: var(--color-ink);
  background: #ffffff;
  border-color: var(--color-border);
}

.button-secondary:not(:disabled):hover {
  border-color: var(--color-primary);
}

.editor-grid {
  display: grid;
  grid-template-columns: 232px minmax(420px, 1fr) 372px;
  gap: var(--space-3);
  min-height: 0;
  padding: var(--space-3);
}

.toolbox-panel,
.workspace-panel,
.code-panel {
  min-height: calc(100vh - var(--topbar-height) - 24px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-panel);
}

.toolbox-panel,
.code-panel {
  padding: var(--space-4);
}

.panel-title,
.panel-header,
.status-bar,
.workspace-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.toolbox-panel h2,
.code-panel h2 {
  margin: 0;
  font-size: 18px;
  line-height: 1.2;
}

.status-dot {
  width: 10px;
  height: 10px;
  background: var(--color-accent);
  border-radius: 999px;
}

.category-list {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.category-button {
  display: flex;
  align-items: center;
  min-height: 42px;
  width: 100%;
  border: 1px solid var(--color-border);
  border-left-width: 6px;
  border-radius: var(--radius-sm);
  padding: 0 var(--space-3);
  color: var(--color-ink);
  background: var(--color-surface-raised);
  font-weight: 800;
  text-align: left;
}

.category-button:hover {
  border-color: var(--color-border-strong);
  background: #f3f8ff;
}

.toolbox-hint {
  margin: var(--space-4) 0 0;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.45;
}

.category-start {
  border-left-color: var(--category-start);
}

.category-logic {
  border-left-color: var(--category-logic);
}

.category-pins {
  border-left-color: var(--category-pins);
}

.category-time {
  border-left-color: var(--category-time);
}

.category-text {
  border-left-color: var(--category-text);
}

.workspace-panel {
  display: grid;
  grid-template-rows: 48px minmax(0, 1fr);
  overflow: hidden;
}

.workspace-toolbar {
  padding: var(--space-2) var(--space-3);
  background: #f8fbff;
  border-bottom: 1px solid var(--color-border);
}

.workspace-status {
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.tab-group {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-height: 34px;
  padding: 3px;
  background: #e8f1fb;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.compact-tabs {
  width: 100%;
  margin: var(--space-4) 0 var(--space-3);
}

.tab {
  min-height: 28px;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 0 var(--space-3);
  color: var(--color-muted);
  background: transparent;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}

.tab.is-active {
  color: var(--color-ink);
  background: #ffffff;
  box-shadow: var(--shadow-control);
}

.workspace-placeholder {
  display: grid;
  width: 100%;
  height: 100%;
  min-height: 480px;
  place-items: center;
  color: var(--color-muted);
}

.blocklySvg {
  background: #f3f7fb;
}

.blocklyMainBackground {
  stroke: none;
  fill: #f3f7fb;
}

.blocklyToolboxDiv {
  background: #263445;
  border-right: 0;
  color: #ffffff;
  box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.12);
}

.blocklyTreeRow {
  min-height: 40px;
  margin: 5px 8px;
  border-radius: 4px;
  padding-right: 12px;
  color: #ffffff;
  font-weight: 800;
  line-height: 40px;
  transition: background 120ms ease, transform 120ms ease;
}

.blocklyTreeRow:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(1px);
}

.blocklyTreeSelected {
  background: rgba(255, 255, 255, 0.16) !important;
  box-shadow: inset 5px 0 0 var(--color-primary);
}

.blocklyTreeLabel {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 800;
  color: #ffffff;
}

.blocklyTreeIcon {
  filter: brightness(1.3);
}

.blocklyFlyoutBackground {
  fill: #f7fbff;
  fill-opacity: 1;
  stroke: #d2e1f0;
  stroke-width: 1px;
}

.blocklyScrollbarHandle {
  fill: #92aeca;
}

.blocklyFlyoutLabelText {
  fill: #41536b;
  font-family: var(--font-body);
  font-weight: 800;
}

.blocklyBlockCanvas .blocklyText {
  font-family: var(--font-body);
  font-weight: 700;
  fill: #ffffff;
}

.blocklyEditableText > rect,
.blocklyFieldRect {
  fill: rgba(255, 255, 255, 0.92);
  stroke: rgba(0, 0, 0, 0.16);
}

.blocklyEditableText > text,
.blocklyDropdownText {
  fill: #12213d;
  font-weight: 800;
}

.blocklySelected > .blocklyPath {
  stroke: #ffd166;
  stroke-width: 3px;
  filter: drop-shadow(0 4px 6px rgba(18, 33, 61, 0.22));
}

.blocklyHighlightedConnectionPath {
  stroke: #ffd166;
  stroke-width: 4px;
}

.blocklyPath {
  filter: drop-shadow(0 2px 2px rgba(18, 33, 61, 0.16));
}

.blocklyInsertionMarker > .blocklyPath {
  fill-opacity: 0.35;
  stroke: #ffd166;
}

.panel-header {
  min-height: 38px;
}

pre {
  min-height: 276px;
  max-height: calc(100vh - 402px);
  margin: 0;
  padding: var(--space-4);
  overflow: auto;
  color: var(--color-code-text);
  background: var(--color-code-bg);
  border: 1px solid #172f55;
  border-radius: var(--radius-md);
  font-family: var(--font-code);
  font-size: 13px;
  line-height: 1.55;
}

.serial-console {
  margin-top: var(--space-3);
}

.assistant-panel {
  margin-top: var(--space-3);
  padding: var(--space-3);
  background: #f7fbff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.serial-console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.serial-console h3 {
  margin: 0;
  font-size: 15px;
  line-height: 1.2;
}

.assistant-mode {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 800;
}

.assistant-input {
  width: 100%;
  min-height: 56px;
  resize: vertical;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  color: var(--color-ink);
  font: inherit;
  line-height: 1.35;
}

.assistant-input:focus-visible {
  outline: 3px solid var(--color-warning);
  outline-offset: 2px;
}

.assistant-button {
  width: 100%;
  margin-top: var(--space-2);
}

.assistant-answer {
  min-height: 62px;
  margin-top: var(--space-2);
  padding: var(--space-3);
  color: var(--color-ink);
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.45;
}

.console-output {
  min-height: 112px;
  max-height: 148px;
  color: #eff6ff;
  background: #081526;
  border-color: #20395f;
}

.status-bar {
  min-height: 36px;
  margin-top: var(--space-3);
  padding: 0 var(--space-3);
  color: var(--color-muted);
  background: #f7fbff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 800;
}

.connection-pill[data-status="connected"] {
  color: #e9fff9;
  background: rgba(0, 166, 166, 0.24);
  border-color: rgba(95, 232, 213, 0.72);
}

.connection-pill[data-status="error"],
.connection-pill[data-status="unsupported"] {
  color: #fff4f4;
  background: rgba(207, 58, 58, 0.26);
  border-color: rgba(255, 168, 168, 0.72);
}

.connection-pill[data-status="selecting"] {
  color: #fff8e3;
  background: rgba(243, 184, 51, 0.22);
  border-color: rgba(255, 222, 135, 0.72);
}