/* Engineering Lab — deliberately NOT Code IDE / HDL Bench */

body.studio-eng {
  --bg-deep: #100c08;
  --bg-base: #17110c;
  --bg-raised: #211910;
  --bg-hover: #2c2116;
  --bg-active: #3a2c1c;
  --border: #3d2e1c;
  --border-soft: rgba(255, 184, 107, 0.14);
  --text: #f6efe6;
  --text-dim: #c4a88a;
  --text-mute: #8a6f55;
  --accent: #ffb86b;
  --accent-dim: rgba(255, 184, 107, 0.16);
  --accent-hot: #7dd3fc;
  --ai: #9ad0ff;
  --radius: 3px;
  --titlebar-h: 46px;
  --activity-w: 54px;
  --sidebar-w: 240px;
  --ai-w: 300px;
  --bottom-h: 150px;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, monospace;
}

body.studio-eng .app {
  grid-template-rows: var(--titlebar-h) 42px 1fr var(--statusbar-h);
  background:
    linear-gradient(90deg, rgba(255, 184, 107, 0.03) 1px, transparent 1px),
    linear-gradient(rgba(255, 184, 107, 0.03) 1px, transparent 1px),
    radial-gradient(780px 340px at 0% 0%, rgba(255, 184, 107, 0.14), transparent 55%),
    radial-gradient(560px 280px at 100% 8%, rgba(125, 211, 252, 0.07), transparent 50%),
    linear-gradient(180deg, #1a120c 0%, var(--bg-deep) 48%, #080604 100%);
  background-size: 28px 28px, 28px 28px, auto, auto, auto;
}

body.studio-eng .titlebar {
  border-bottom: 1px solid rgba(255, 184, 107, 0.28);
  background: linear-gradient(180deg, #2a1c12, #160f0a);
  gap: 12px;
  padding: 0 10px 0 12px;
}

body.studio-eng .eng-flow {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 4px 10px;
  border: 1px solid rgba(255, 184, 107, 0.3);
  border-radius: 999px;
  background: rgba(255, 184, 107, 0.07);
  white-space: nowrap;
}

body.studio-eng .eng-flow__arrow {
  color: var(--text-mute);
  letter-spacing: 0;
}

body.studio-eng .brand-tag {
  background: transparent;
  color: var(--accent);
  border: 1px solid rgba(255, 184, 107, 0.5);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  padding: 3px 7px;
}

body.studio-eng .menu-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 2px;
  padding: 7px 10px;
}

body.studio-eng .menu-btn:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

body.studio-eng .eng-rail {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  border-bottom: 1px dashed rgba(255, 184, 107, 0.22);
  background: rgba(14, 10, 6, 0.94);
  overflow-x: auto;
  scrollbar-width: thin;
}

body.studio-eng .eng-rail__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-mute);
  flex-shrink: 0;
}

body.studio-eng .eng-chip {
  flex-shrink: 0;
  padding: 6px 11px;
  border-radius: 999px;
  border: 1px solid rgba(255, 184, 107, 0.35);
  background: rgba(255, 184, 107, 0.08);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}

body.studio-eng .eng-chip:hover {
  background: rgba(255, 184, 107, 0.18);
  border-color: var(--accent);
  transform: translateY(-1px);
}

body.studio-eng .eng-chip--ghost {
  border-style: dashed;
  color: var(--text-dim);
}

body.studio-eng .eng-rail__sep {
  width: 1px;
  height: 18px;
  background: rgba(255, 184, 107, 0.25);
  flex-shrink: 0;
  margin: 0 4px;
}

body.studio-eng .eng-rail__hint {
  font-size: 11px;
  color: var(--text-mute);
  white-space: nowrap;
}

body.studio-eng .activity {
  border-right: 1px solid rgba(255, 184, 107, 0.2);
  background:
    repeating-linear-gradient(
      180deg,
      transparent,
      transparent 10px,
      rgba(255, 184, 107, 0.04) 10px,
      rgba(255, 184, 107, 0.04) 11px
    ),
    #120d08;
}

body.studio-eng .activity::before {
  content: "LAB";
  display: block;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--accent);
  padding: 12px 0 8px;
}

body.studio-eng .activity__btn {
  border-radius: 2px;
  margin: 4px;
  width: calc(100% - 8px);
}

body.studio-eng .activity__btn.is-active {
  background: var(--accent-dim);
  color: var(--accent);
  box-shadow: inset 3px 0 0 var(--accent);
}

body.studio-eng .sidebar {
  border-right: 1px solid rgba(255, 184, 107, 0.16);
  background: rgba(10, 7, 4, 0.9);
}

body.studio-eng .sidebar__header {
  align-items: flex-start;
  border-bottom: 1px dashed rgba(255, 184, 107, 0.2);
  gap: 8px;
}

body.studio-eng .sidebar__title {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

body.studio-eng .eng-side-sub {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-mute);
}

body.studio-eng .tree-item.is-active,
body.studio-eng .tree__file.is-active {
  background: rgba(255, 184, 107, 0.12);
  border-radius: 2px;
}

body.studio-eng .tabs {
  background: #120d08;
  border-bottom: 1px solid rgba(255, 184, 107, 0.14);
  min-height: 32px;
}

body.studio-eng .tab.is-active {
  border-bottom-color: var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
}

body.studio-eng .editor-row.has-preview {
  grid-template-columns: minmax(260px, 0.9fr) minmax(300px, 1.1fr) !important;
}

body.studio-eng .editor-shell {
  background:
    linear-gradient(90deg, rgba(255, 184, 107, 0.025) 1px, transparent 1px),
    linear-gradient(rgba(255, 184, 107, 0.025) 1px, transparent 1px),
    #17110c;
  background-size: 22px 22px;
}

body.studio-eng .editor-empty__brand {
  color: var(--accent);
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
}

body.studio-eng .editor-empty__hint {
  max-width: 400px;
  line-height: 1.55;
}

body.studio-eng .eng-empty-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

body.studio-eng .preview {
  border-left: 1px solid rgba(255, 184, 107, 0.28);
  background:
    radial-gradient(rgba(255, 184, 107, 0.05) 1px, transparent 1px),
    #100c08;
  background-size: 14px 14px, auto;
}

body.studio-eng .preview__bar {
  background: linear-gradient(90deg, rgba(255, 184, 107, 0.14), transparent 70%);
  border-bottom: 1px solid rgba(255, 184, 107, 0.2);
}

body.studio-eng .preview__title {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

body.studio-eng .preview__title::before {
  content: "▤ ";
}

body.studio-eng .preview-py {
  display: none !important;
}

body.studio-eng .bottom {
  border-top: 1px solid rgba(255, 184, 107, 0.18);
  background: #0c0906;
}

body.studio-eng .bottom__tab.is-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

body.studio-eng .ai-panel {
  border-left: 1px solid rgba(255, 184, 107, 0.2);
  background:
    linear-gradient(180deg, rgba(255, 184, 107, 0.07), transparent 140px),
    #140f0a;
}

body.studio-eng .ai-panel__header {
  border-bottom: 1px dashed rgba(255, 184, 107, 0.22);
}

body.studio-eng .ai-panel__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

body.studio-eng .ai-dot {
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

body.studio-eng .ai-send {
  background: var(--accent);
  color: #1a1008;
  border-radius: 2px;
}

body.studio-eng .ai-msg--bot {
  border-left: 2px solid rgba(255, 184, 107, 0.4);
  border-radius: 0 6px 6px 0;
}

body.studio-eng .eng-prompts {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0 12px 12px;
}

body.studio-eng .eng-prompts button {
  text-align: left;
  padding: 10px 12px;
  border-radius: 6px;
  border: 1px dashed rgba(255, 184, 107, 0.28);
  background: rgba(255, 184, 107, 0.05);
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.4;
  cursor: pointer;
}

body.studio-eng .eng-prompts button:hover {
  border-style: solid;
  border-color: rgba(255, 184, 107, 0.55);
  color: var(--text);
  background: rgba(255, 184, 107, 0.1);
}

body.studio-eng .statusbar {
  background: #0a0705;
  border-top: 1px solid rgba(255, 184, 107, 0.22);
  font-family: var(--font-mono);
  font-size: 11px;
}

body.studio-eng .status-item--accent {
  color: var(--accent);
  letter-spacing: 0.06em;
}

body.studio-eng .status-item--live .pulse {
  background: var(--accent);
}

body.studio-eng .ctx-run {
  display: none;
}

@media (max-width: 1100px) {
  body.studio-eng .eng-flow {
    display: none;
  }

  body.studio-eng .eng-rail__hint {
    display: none;
  }
}

@media (max-width: 900px) {
  body.studio-eng .app {
    grid-template-rows: var(--titlebar-h) 40px 1fr var(--statusbar-h);
  }

  body.studio-eng .editor-row.has-preview {
    grid-template-columns: 1fr !important;
    grid-template-rows: minmax(0, 42%) minmax(0, 58%);
  }
}

@media (max-width: 640px) {
  body.studio-eng .eng-rail {
    gap: 6px;
    padding: 0 8px;
  }

  body.studio-eng .eng-rail__label {
    display: none;
  }
}