:root {
  --bg: #05060d;
  --chrome: #0e121f;
  --chrome-alt: #101528;
  --panel: #151b2f;
  --panel-alt: #1c2238;
  --accent: #3f9cff;
  --accent-hot: #ff3b6f;
  --text: #e5e9ff;
  --text-muted: #94a0c0;
  --border: rgba(255,255,255,0.08);
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: "Inter","Segoe UI",system-ui,sans-serif;
  background: var(--bg);
  color: var(--text);
}
body { display: flex; flex-direction: column; }
#app { flex: 1; display: flex; min-height: 0; }

.engine-shell {
  display: flex;
  flex: 1;
  min-height: 0;
  width: 100%;
  background: radial-gradient(circle at top, #151d38, #04050b 65%);
}
.engine-nav {
  width: 72px;
  background: var(--chrome);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 18px 0;
  gap: 16px;
}
.nav-logo {
  font-size: 1.6rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.engine-nav button {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: var(--chrome-alt);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
}
.engine-nav button.active {
  border-color: var(--accent);
  color: var(--accent);
}
.engine-nav .nav-footer {
  margin-top: auto;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.engine-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  background: var(--chrome-alt);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}
.toolbar {
  display: flex;
  gap: 10px;
}
.toolbar button {
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 6px;
  background: var(--panel-alt);
  color: var(--text);
  padding: 8px 16px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.78rem;
  cursor: pointer;
}
.toolbar button.primary {
  background: var(--accent);
  color: #041024;
  border-color: var(--accent);
  font-weight: 600;
}
.metrics {
  display: flex;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.metrics span {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
}

.dock-layout {
  flex: 1;
  display: grid;
  grid-template-columns: 260px 1fr 360px;
  gap: 8px;
  padding: 10px;
  min-height: 0;
}
.dock-column,
.dock-center {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 0;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  min-height: 0;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.2);
}
.panel h3 {
  margin: 0 0 10px;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.panel h4 {
  margin: 10px 0 6px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-transform: uppercase;
}
.list { flex: 1; overflow: auto; }

.viewport-shell {
  position: relative;
  flex: 1;
  min-height: 0;
}
canvas#viewport {
  width: 100%;
  height: 100%;
  border-radius: 8px;
  background: #05070f;
}
canvas#viewport:focus { outline: none; }
.viewport-overlay {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: rgba(0,0,0,0.55);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.assets .upload {
  margin-bottom: 10px;
}
.upload label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: 6px 12px;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 0.8rem;
}
.asset-list {
  flex: 1;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.asset-item {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: 8px;
  display: flex;
  gap: 10px;
  align-items: center;
  background: rgba(255,255,255,0.02);
}
.asset-thumb {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  background: #0b0f1f;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.asset-thumb img { max-width: 100%; max-height: 100%; display: block; }
.asset-meta { flex: 1; font-size: 0.78rem; color: var(--text-muted); }
.asset-item button {
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #03152a;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 0.75rem;
}

.beginner-tools {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px,1fr));
  gap: 8px;
}
.tool-grid button {
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  padding: 6px;
  background: rgba(255,255,255,0.03);
  color: var(--text);
  font-size: 0.75rem;
  cursor: pointer;
}
.tool-grid button:hover { border-color: var(--accent); }

.code-shell {
  flex: 1;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 6px;
  overflow: hidden;
  background: #050812;
}
#codeEditor { width: 100%; height: 100%; }

.console-output {
  flex: 1;
  font-family: "JetBrains Mono","Fira Code",monospace;
  font-size: 0.78rem;
  overflow: auto;
  background: #03060f;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 6px;
  padding: 8px;
}
.status-bar {
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  background: var(--chrome);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.status-chip {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  background: rgba(255,255,255,0.08);
  color: var(--text-muted);
}
.status-chip.done {
  background: var(--accent);
  color: #041024;
}

.tree-row {
  padding: 4px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  font-size: 0.82rem;
}
.muted { color: var(--text-muted); font-size: 0.78rem; }
.inspector-empty { color: var(--text-muted); font-style: italic; }

@media (max-width: 1200px) {
  .dock-layout {
    grid-template-columns: 240px 1fr;
    grid-template-rows: auto auto;
    grid-auto-rows: minmax(200px, auto);
  }
  .dock-center { grid-column: span 1; }
}

@media (max-width: 900px) {
  .engine-nav { display: none; }
  .dock-layout { grid-template-columns: 1fr; }
}


.project-files .file-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}
.breadcrumbs .crumb {
  cursor: pointer;
  color: var(--accent);
}
.file-buttons {
  display: flex;
  gap: 6px;
}
.file-buttons button {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: rgba(255,255,255,0.04);
  color: var(--text);
  width: 30px;
  height: 28px;
  cursor: pointer;
}
.file-list {
  flex: 1;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.file-item {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255,255,255,0.02);
  font-size: 0.78rem;
}
.file-item .actions {
  display: flex;
  gap: 6px;
}
.file-item .actions button {
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  background: rgba(63,156,255,0.15);
  color: var(--text);
  padding: 4px 10px;
  font-size: 0.72rem;
  cursor: pointer;
}
.code-path-label {
  margin-top: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.inspector-row {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 6px;
  font-size: 0.75rem;
}
.inspector-row label {
  width: 46px;
  color: var(--text-muted);
}
.inspector-row input {
  flex: 1;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  background: rgba(0,0,0,0.3);
  color: var(--text);
  padding: 4px 6px;
}