/* ============================================================
   Blockly for FRC — design tokens
   ============================================================ */
:root {
  /* surfaces */
  --bg-0: #0a0c10;
  --bg-1: #0f1218;
  --bg-2: #151921;
  --bg-3: #1c2230;
  --bg-4: #242b3a;
  --line: #232936;
  --line-2: #2e3548;
  --line-3: #3a4358;

  /* text */
  --fg: #e6ebf3;
  --fg-dim: #98a2b8;
  --fg-mute: #5b6478;
  --fg-faint: #3d4456;

  /* accents */
  --accent: #27a692;          /* cyan-mint, primary */
  --accent-dim: #166055;
  --accent-glow: rgba(39,166,146,0.18);
  --warn: #c9882e;
  --danger: #ff5872;
  --info: #4d84d4;
  --purple: #8460cc;
  --pink: #c4508a;

  /* command-block colors (used by Blockly themes too) */
  --c-sequence: #4570c0;
  --c-parallel: #7850b5;
  --c-race: #bf6450;
  --c-deadline: #a86e25;
  --c-leaf: #27a692;
  --c-control: #c44075;
  --c-trigger: #c9882e;

  /* radii / shadows */
  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 10px;
  --shadow-1: 0 1px 0 rgba(255,255,255,0.03), 0 1px 2px rgba(0,0,0,0.4);
  --shadow-2: 0 8px 24px -8px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 0 1px var(--accent-glow), 0 0 24px -8px var(--accent-glow);
  --shadow-txt: 0 0 2px #111;

  /* type */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

/* ============================================================
   reset / base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: var(--font-display), sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg);
  background-color: var(--bg-0);
  background-image:
    radial-gradient(circle at 12% -10%, rgba(39,166,146,0.05) 0%, transparent 35%),
    radial-gradient(circle at 95% 5%, rgba(132,96,204,0.04) 0%, transparent 30%),
    linear-gradient(180deg, var(--bg-0) 0%, #07090c 100%);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }
code, pre { font-family: var(--font-mono), monospace; }
::selection { background: var(--accent-glow); color: var(--fg); }

/* scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 10px; border: 2px solid var(--bg-0); }
::-webkit-scrollbar-thumb:hover { background: var(--line-3); }

/* ============================================================
   topbar
   ============================================================ */
.topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
  padding: 14px 24px;
  background: linear-gradient(180deg, rgba(15,18,24,0.95) 0%, rgba(15,18,24,0.85) 100%);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dim) 100%);
  color: var(--bg-0);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-1), 0 0 0 1px rgba(39,166,146,0.25), 0 8px 24px -10px rgba(39,166,146,0.5);
}

.brand-name {
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 15px;
  line-height: 1;
}

.brand-sub {
  font-family: var(--font-mono), monospace;
  font-size: 10px;
  color: var(--fg-mute);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* tabs */
.tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 3px;
  width: fit-content;
  margin: 0 auto;
}

.tab {
  background: transparent;
  border: none;
  color: var(--fg-dim);
  padding: 8px 18px;
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 120ms ease;
  letter-spacing: -0.005em;
}

.tab:hover { color: var(--fg); background: var(--bg-2); }

.tab.active {
  background: var(--bg-3);
  color: var(--fg);
  box-shadow: 0 0 0 1px var(--line-2);
}

.tab-num {
  font-family: var(--font-mono), monospace;
  font-size: 10px;
  color: var(--fg-mute);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.tab.active .tab-num { color: var(--accent); }

.topbar-actions {
  display: flex;
  gap: 8px;
}

/* ============================================================
   buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 0.9em;
  font-weight: 500;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  letter-spacing: -0.005em;
  transition: all 120ms ease;
  white-space: nowrap;
}

.btn-sm { padding: 5px 10px; font-size: 0.8em; }
.btn-block { width: 100%; justify-content: center; }

.btn-primary {
  background: var(--accent);
  color: var(--bg-0);
  font-weight: 600;
  box-shadow: 0 1px 0 rgba(255,255,255,0.15) inset, 0 1px 2px rgba(0,0,0,0.4);
}
.btn-primary:hover {
  background: #30b8a0;
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.2) inset, 0 6px 14px -4px var(--accent-glow);
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: var(--bg-2);
  color: var(--fg-dim);
  border-color: var(--line);
}
.btn-ghost:hover { background: var(--bg-3); color: var(--fg); border-color: var(--line-2); }

.btn-danger {
  background: transparent;
  color: var(--danger);
  border-color: rgba(255,88,114,0.3);
}
.btn-danger:hover { background: rgba(255,88,114,0.08); border-color: var(--danger); }

.btn-icon {
  width: 28px;
  height: 28px;
  padding: 0;
  justify-content: center;
  background: transparent;
  color: var(--fg-mute);
  border: 1px solid transparent;
  border-radius: var(--r-sm);
}
.btn-icon:hover { color: var(--fg); background: var(--bg-3); }

/* ============================================================
   views
   ============================================================ */
.view { display: none; }
.view.active { display: block; }

/* ============================================================
   CONFIGURE VIEW
   ============================================================ */
.view-configure {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.view-grid {
  display: grid;
  gap: 20px;
}

.panel {
  background: linear-gradient(180deg, rgba(21,25,33,0.7) 0%, rgba(15,18,24,0.7) 100%);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px 28px;
  box-shadow: var(--shadow-1);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 20px;
}

.panel-eyebrow {
  font-family: var(--font-mono), monospace;
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 6px;
  font-weight: 500;
}

.panel-title {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 6px;
  letter-spacing: -0.02em;
}

.panel-desc {
  margin: 0;
  color: var(--fg-dim);
  font-size: 13px;
  max-width: 60ch;
}

.panel-desc code, .qs-text code {
  background: var(--bg-3);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.85em;
  color: var(--accent);
  border: 1px solid var(--line-2);
}

/* form fields */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.field > span {
  font-size: 0.8em;
  color: var(--fg-dim);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.field input, .field select, .field textarea {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 9px 12px;
  color: var(--fg);
  font-size: 13px;
  transition: all 120ms ease;
  font-family: var(--font-mono), monospace;
}

.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.field input::placeholder { color: var(--fg-faint); }

/* ---- subsystems ---- */
.subsystem-list { display: flex; flex-direction: column; gap: 12px; }

.subsystem-card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color 160ms;
}

.subsystem-card:hover { border-color: var(--line-2); }

.subsystem-header {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 14px;
  align-items: center;
  padding: 14px 16px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--line);
}

.subsystem-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  background: linear-gradient(135deg, rgba(69,112,192,0.2), rgba(69,112,192,0.05));
  border: 1px solid rgba(69,112,192,0.3);
  color: #7a9de0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono), monospace;
  font-weight: 600;
  font-size: 13px;
}

.subsystem-title {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.subsystem-name {
  font-family: var(--font-mono), monospace;
  font-weight: 600;
  font-size: 14px;
  color: var(--fg);
}

.subsystem-meta {
  font-size: 11px;
  color: var(--fg-mute);
  font-family: var(--font-mono), monospace;
}

.subsystem-body { padding: 14px 16px 16px; }

.method-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.method-row {
  display: grid;
  grid-template-columns: 130px 1fr 1fr auto;
  gap: 10px;
  align-items: center;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 8px 10px;
  transition: border-color 120ms;
}

.method-row:hover { border-color: var(--line-2); }

.method-row select, .method-row input {
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 6px 8px;
  color: var(--fg);
  font-size: 12px;
  font-family: var(--font-mono), monospace;
}

.method-row select:focus, .method-row input:focus {
  outline: none;
  border-color: var(--accent);
}

.method-row .type-badge {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 3px;
  font-family: var(--font-mono), monospace;
  font-weight: 500;
  text-align: center;
  letter-spacing: 0.04em;
}

.add-method-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px dashed var(--line-2);
  color: var(--fg-dim);
  padding: 7px 12px;
  border-radius: var(--r-sm);
  font-size: 12px;
  transition: all 120ms;
}
.add-method-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  border-style: solid;
}

/* ---- controllers ---- */
.controller-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.controller-card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: border-color 120ms;
}

.controller-card:hover { border-color: var(--line-2); }

.controller-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: var(--r-sm);
  background: linear-gradient(135deg, rgba(201,136,46,0.15), rgba(201,136,46,0.05));
  border: 1px solid rgba(201,136,46,0.3);
  color: var(--warn);
  display: flex;
  align-items: center;
  justify-content: center;
}

.controller-info { flex: 1; min-width: 0; }

.controller-info input {
  background: transparent;
  border: none;
  color: var(--fg);
  font-family: var(--font-mono), monospace;
  font-weight: 600;
  font-size: 13px;
  padding: 0;
  width: 100%;
}
.controller-info input:focus { outline: none; }

.controller-info select {
  background: transparent;
  border: none;
  color: var(--fg-mute);
  font-family: var(--font-mono), monospace;
  font-size: 11px;
  padding: 2px 0;
  margin-top: 2px;
  width: 100%;
  cursor: pointer;
}
.controller-info select:focus { outline: none; }

/* ---- empty state ---- */
.empty-state {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 48px 24px;
  color: var(--fg-mute);
}

.empty-state.visible { display: flex; }

.empty-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  color: var(--fg-mute);
}

.empty-title {
  font-weight: 600;
  color: var(--fg-dim);
  margin-bottom: 4px;
}

.empty-desc { font-size: 0.9em; }

.empty-desc code {
  background: var(--bg-3);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--accent);
  font-size: 11px;
}

/* ---- quickstart panel ---- */
.panel-quickstart {
  background: linear-gradient(135deg, rgba(39,166,146,0.04) 0%, rgba(69,112,192,0.04) 100%);
  border-color: var(--line-2);
}

.qs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.qs-step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.qs-num {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono), monospace;
  font-size: 12px;
  font-weight: 600;
}

.qs-text {
  font-size: 13px;
  color: var(--fg-dim);
  line-height: 1.55;
}
.qs-text strong { color: var(--fg); font-weight: 600; }

/* ============================================================
   BUILDER VIEW
   ============================================================ */
.builder-shell {
  display: grid;
  grid-template-columns: 240px 1fr 360px;
  height: calc(100vh - 67px);
  overflow: hidden;
}

.builder-side {
  background: var(--bg-1);
  border-right: 1px solid var(--line);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow-y: auto;
}

.side-section { display: flex; flex-direction: column; gap: 10px; }

.side-eyebrow {
  font-family: var(--font-mono), monospace;
  font-size: 10px;
  color: var(--fg-mute);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
  padding: 0 6px;
}

.side-binding-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.binding-tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--fg-dim);
  padding: 10px 12px;
  border-radius: var(--r-sm);
  text-align: left;
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 120ms;
  position: relative;
  width: 100%;
}

.binding-tab:hover {
  background: var(--bg-2);
  color: var(--fg);
}

.binding-tab.active {
  background: var(--bg-3);
  color: var(--fg);
  border-color: var(--line-2);
}

.binding-tab.active::before {
  content: '';
  position: absolute;
  left: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

.binding-tab-name {
  font-weight: 600;
  font-size: 0.9em;
}

.binding-tab-trigger {
  font-family: var(--font-mono), monospace;
  font-size: 0.7em;
  color: var(--fg-mute);
  letter-spacing: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.binding-tab.active .binding-tab-trigger { color: var(--accent); }

.binding-tab-delete {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--fg-mute);
  width: 20px;
  height: 20px;
  border-radius: 3px;
  display: none;
  align-items: center;
  justify-content: center;
}
.binding-tab:hover .binding-tab-delete { display: flex; }
.binding-tab-delete:hover { background: rgba(255,88,114,0.15); color: var(--danger); }

/* tips */
.tips { display: flex; flex-direction: column; gap: 6px; padding: 0 6px; }
.tip {
  font-size: 0.8em;
  color: var(--fg-mute);
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.tip-key {
  font-family: var(--font-mono), monospace;
  font-size: 10px;
  background: var(--bg-3);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--line-2);
  color: var(--fg-dim);
  letter-spacing: 0.04em;
}

/* builder main */
.builder-main {
  display: flex;
  flex-direction: column;
  background: var(--bg-0);
  min-width: 0;
}

.builder-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--line);
  min-height: 52px;
}

.builder-binding-info {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
}

.bbi-line { display: flex; align-items: center; gap: 8px; }

.bbi-label {
  font-family: var(--font-mono), monospace;
  font-size: 10px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.bbi-value {
  font-weight: 600;
  font-size: 13px;
  color: var(--fg);
}

.bbi-code {
  font-family: var(--font-mono), monospace;
  font-size: 12px;
  background: var(--bg-3);
  padding: 3px 8px;
  border-radius: 3px;
  color: var(--accent);
  border: 1px solid var(--line-2);
}

.builder-toolbar-actions { display: flex; gap: 8px; }

#blockly-area {
  flex: 1;
  min-height: 0;
  background: var(--bg-0);
}

/* live preview pane */
.builder-preview {
  background: var(--bg-1);
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.preview-head {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
}

.code-block {
  font-family: var(--font-mono), monospace;
  font-size: 12px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg-1);
  padding: 16px 18px;
  margin: 0;
  white-space: pre;
  overflow: auto;
  flex: 1;
  min-height: 0;
}

/* highlight.js renders into a <code> child. Make it transparent so the
   atom-one-dark theme's own background isn't doubled up against
   .code-block's background. */
.code-block code.hljs,
.code-block code {
  background: transparent;
  padding: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
  display: block;
}

/* ============================================================
   EXPORT VIEW
   ============================================================ */
.export-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.export-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.export-actions { display: flex; gap: 8px; }

.code-block-large {
  background: linear-gradient(180deg, var(--bg-1) 0%, #0c0f15 100%);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px 28px;
  max-height: calc(100vh - 240px);
  box-shadow: var(--shadow-1);
}

/* ============================================================
   modal
   ============================================================ */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(8,10,14,0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  animation: fadeIn 120ms ease;
}
.modal.visible { display: flex; }

.modal-content {
  background: var(--bg-1);
  border: 1px solid var(--line-2);
  border-radius: var(--r-lg);
  padding: 24px 28px;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow-2);
  animation: scaleIn 160ms cubic-bezier(.2,.8,.2,1);
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.modal-desc {
  color: var(--fg-dim);
  font-size: 13px;
  margin: 0 0 20px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 18px;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.96); } to { opacity: 1; transform: scale(1); } }

/* ============================================================
   toast
   ============================================================ */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--bg-3);
  color: var(--fg);
  border: 1px solid var(--line-2);
  border-radius: var(--r-md);
  padding: 10px 18px;
  font-size: 13px;
  box-shadow: var(--shadow-2);
  opacity: 0;
  pointer-events: none;
  transition: all 200ms ease;
  z-index: 1100;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.toast.toast-error::before { background: var(--danger); box-shadow: 0 0 8px var(--danger); }

/* ============================================================
   blockly overrides
   ============================================================ */
.blocklyMainBackground {
  stroke: none !important;
}

.blocklyToolboxDiv {
  background: var(--bg-1) !important;
  border-right: 1px solid var(--line) !important;
  padding: 8px !important;
}

.blocklyTreeRow {
  border-radius: var(--r-sm) !important;
  margin: 2px 4px !important;
  height: 32px !important;
  line-height: 32px !important;
  padding: 0 10px !important;
  border: none !important;
  transition: background 120ms;
}

.blocklyTreeRow:hover { background: var(--bg-2) !important; }

/* Default (un-selected) selected-glow override.
   Blockly applies .blocklyTreeSelected for keyboard-nav focus; we
   reuse the same look as our own .frcToolboxCategorySelected class. */
.blocklyTreeSelected {
  background: var(--bg-3) !important;
}

.blocklyTreeLabel {
  font-family: var(--font-display), sans-serif !important;
  font-size: 0.9em !important;
  color: var(--fg) !important;
  font-weight: 500 !important;
  text-shadow: var(--shadow-txt);
}

.blocklyTreeSelected .blocklyTreeLabel {
  color: var(--fg) !important;
}

/* ------------------------------------------------------------------
   Toolbox expand/collapse arrows.

   Blockly's default CSS points .blocklyTreeIcon at an external
   sprite (blockly-demo.appspot.com/static/media/sprites.png) whose
   black triangles read poorly on our dark surfaces and add a
   third-party network request. We replace them with inline SVG
   chevrons stroked in --fg-dim, so they pick up the rest of the
   theme. The classes Blockly toggles are:
     .blocklyTreeIconClosedLtr  – collapsed, LTR locale (▶)
     .blocklyTreeIconClosedRtl  – collapsed, RTL locale (◀)
     .blocklyTreeIconOpen       – expanded, both locales (▼)
   Selected rows flip to a near-black label color, so we swap the
   stroke to --bg-0 there for contrast.
   ------------------------------------------------------------------ */
.blocklyTreeIcon {
  background-image: none !important;
  background-repeat: no-repeat !important;
  background-position: center !important;
  background-size: 16px 16px !important;
  width: 16px !important;
  height: 16px !important;
  margin-right: 4px !important;
  opacity: 0.85;
  transition: opacity 120ms ease;
  background-color: currentColor !important;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.blocklyTreeRow:hover .blocklyTreeIcon { opacity: 1; }

.blocklyTreeIconClosed,.blocklyTreeIconClosedLtr {
  -webkit-mask-image: url(#chevron-right);
  mask-image: url(#chevron-right);
}
.blocklyTreeIconClosedRtl {
  -webkit-mask-image: url(#chevron-left) !important;
  mask-image: url(#chevron-left) !important;
}
.blocklyTreeIconOpen {
  -webkit-mask-image: url(#chevron-down) !important;
  mask-image: url(#chevron-down) !important;
}

/* Toolbox category indicator stripe (left edge). The --frc-cat-color
   custom property is set per-row by FRCToolboxCategory.addColourBorder_,
   which receives the category's themed color from Blockly. */
.frcToolboxCategory {
  position: relative;
}
.frcToolboxCategory::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  border-radius: 2px;
  background: var(--fg-mute);
}

/* Selected state for our custom category — the row is filled with the
   category color, label flips to dark for contrast (handled in the
   setSelected override). */
.frcToolboxCategorySelected {
  background: var(--bg-3) !important;
}
.frcToolboxCategorySelected::before {
  background: rgba(0, 0, 0, 0.25);
}

/* Labels in dynamic flyout categories (e.g. "Define a method first"). */
.frcEmptyFlyoutLabel > text {
  fill: var(--fg-mute) !important;
  font-family: var(--font-display), sans-serif !important;
  font-style: italic;
  font-size: 0.8em !important;
}

.blocklyFlyoutBackground {
  fill: var(--bg-2) !important;
  fill-opacity: 1 !important;
}

.blocklyFlyout {
  border-right: 1px solid var(--line) !important;
}

.blocklyScrollbarHandle { fill: var(--line-2) !important; }

.blocklyText {
  font-family: var(--font-mono), monospace !important;
  font-size: 12px !important;
  fill: white !important;
  text-shadow: var(--shadow-txt);
}

.blocklyFieldRect {
  fill-opacity: .2 !important;
}

.blocklyPathLight, .blocklyPathDark { display: none !important; }

.blocklyDropdownText { font-family: var(--font-mono), monospace !important; }

.blocklyHtmlInput {
  font-family: var(--font-mono), monospace !important;
  font-size: 12px !important;
  background: var(--bg-3) !important;
  color: var(--fg) !important;
  border: 1px solid var(--accent) !important;
}

.blocklyDropDownDiv {
  background: var(--bg-2) !important;
  border: 1px solid var(--line-2) !important;
  border-radius: var(--r-md) !important;
  box-shadow: var(--shadow-2) !important;
}

.blocklyMenu {
  background: transparent !important;
  font-family: var(--font-display), sans-serif !important;
}

.blocklyMenuItem {
  color: var(--fg-dim) !important;
  font-size: 0.9em !important;
  padding: 8px 14px !important;
}

.blocklyMenuItemHighlight {
  background: var(--bg-3) !important;
  color: var(--fg) !important;
}

.blocklyContextMenu {
  background: var(--bg-2) !important;
  border: 1px solid var(--line-2) !important;
  border-radius: var(--r-md) !important;
  box-shadow: var(--shadow-2) !important;
  padding: 4px !important;
}

.blocklyWidgetDiv .goog-menuitem-content {
  font-family: var(--font-display), sans-serif !important;
  font-size: 0.9em !important;
  color: var(--fg-dim) !important;
}

/* trash and zoom controls */
.blocklyZoom > image, .blocklyZoom > svg {
  opacity: 0.6;
}
.blocklyZoom > image:hover, .blocklyZoom > svg:hover {
  opacity: 1;
}

.blocklyTrash { opacity: 0.6 !important; }
.blocklyTrash:hover { opacity: 1 !important; }

/* ============================================================
   responsive
   ============================================================ */
@media (max-width: 1100px) {
  .builder-shell { grid-template-columns: 220px 1fr; }
  .builder-preview { display: none; }
}
@media (max-width: 768px) {
  .topbar { grid-template-columns: 1fr; gap: 12px; padding: 12px; }
  .tabs { margin: 0; width: 100%; }
  .topbar-actions { justify-content: center; }
  .builder-shell { grid-template-columns: 1fr; }
  .builder-side { display: none; }
}