:root {
  --bg-0: #14161a;
  --bg-1: #1b1e24;
  --bg-2: #22262e;
  --bg-3: #2a2e37;
  --border: #383d47;
  --text: #e8eaed;
  --text-dim: #9aa0ac;
  --accent: #4a90d9;
  --accent-2: #ffc85c;
  --danger: #e0666a;
  --good: #5fae5f;
  font-size: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg-0);
  color: var(--text);
  font-family: "Segoe UI", -apple-system, Arial, sans-serif;
  overflow: hidden;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 13px;
  color: var(--text);
}

.app-shell {
  display: grid;
  grid-template-columns: 230px 1fr 340px;
  grid-template-rows: 50px 1fr 120px;
  grid-template-areas:
    "topbar topbar topbar"
    "palette canvas inspector"
    "timeline timeline timeline";
  height: 100vh;
  width: 100vw;
}

/* ---- top bar ---- */
.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 12px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
}
.topbar .app-title {
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--accent-2);
  margin-right: 6px;
  white-space: nowrap;
}
.topbar .scene-name {
  color: var(--text-dim);
  margin-right: auto;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar .scene-name .dirty-mark { color: var(--danger); margin-left: 4px; }
.topbar-spacer { flex: 1 1 auto; }
.topbar-sep { width: 1px; align-self: stretch; margin: 8px 4px; background: var(--border); }

.dag-btn {
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
}
.dag-btn:hover { background: #333846; border-color: #4a5062; }
.dag-btn:active { background: #3a4050; }
.dag-btn.primary { background: var(--accent); border-color: var(--accent); color: #0d1520; font-weight: 600; }
.dag-btn.primary:hover { background: #5fa0e6; }
.dag-btn.danger { border-color: var(--danger); color: var(--danger); }
.dag-btn.danger:hover { background: rgba(224,102,106,0.15); }
.dag-btn:disabled { opacity: 0.4; cursor: default; }

/* ---- palette ---- */
.palette {
  grid-area: palette;
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 8px;
}
.palette h3 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim);
  margin: 12px 4px 6px;
}
.palette-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid transparent;
}
.palette-item:hover { background: var(--bg-3); border-color: var(--border); }
.palette-swatch {
  width: 14px; height: 14px; border-radius: 3px; flex: 0 0 auto;
  border: 1px solid rgba(255,255,255,0.35);
}
.palette-item .pt-label { font-size: 13px; }
.palette-item .pt-sub { font-size: 11px; color: var(--text-dim); margin-left: auto; }

/* ---- canvas ---- */
.canvas-wrap {
  grid-area: canvas;
  position: relative;
  overflow: hidden;
  background: #1b1e24;
}
.canvas-hint {
  position: absolute;
  left: 10px; bottom: 8px;
  font-size: 11px;
  color: var(--text-dim);
  background: rgba(20,22,26,0.7);
  padding: 4px 8px;
  border-radius: 4px;
  pointer-events: none;
  line-height: 1.5;
}

/* ---- inspector ---- */
.inspector {
  grid-area: inspector;
  background: var(--bg-1);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.inspector-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
}
.inspector-tab {
  flex: 1 1 0;
  text-align: center;
  padding: 9px 4px;
  cursor: pointer;
  color: var(--text-dim);
  font-size: 12px;
  border-bottom: 2px solid transparent;
}
.inspector-tab.active { color: var(--text); border-bottom-color: var(--accent); }
.inspector-body {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 12px;
}
.inspector-body h4 {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--accent-2);
}
.field-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.field-row label {
  flex: 0 0 46%;
  font-size: 12px;
  color: var(--text-dim);
}
.field-row input[type=text],
.field-row input[type=number],
.field-row input[type=color],
.field-row select,
.field-row input[type=path] {
  flex: 1 1 auto;
  min-width: 0;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 5px 6px;
}
.field-row.checkbox { justify-content: flex-start; }
.field-row.checkbox label { flex: 0 0 auto; }
.field-group {
  border-top: 1px solid var(--border);
  padding-top: 10px;
  margin-top: 10px;
}
.field-group-title {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}
.mono { font-family: "Cascadia Code", Consolas, monospace; font-size: 11px; color: var(--text-dim); word-break: break-all; }
.color4-row { display: flex; gap: 6px; align-items: center; }
.color4-row input[type=number] { width: 100%; }

pre.json-preview, .py-preview {
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 11.5px;
  white-space: pre-wrap;
  word-break: break-word;
  height: 100%;
  overflow-y: auto;
  margin: 0;
}
.py-cmd { margin-bottom: 8px; padding-bottom: 8px; border-bottom: 1px dashed var(--border); }
.py-cmd:last-child { border-bottom: none; }
.py-cmd .py-node-name { color: var(--accent-2); font-weight: 600; }
.py-cmd .py-frame { color: var(--text-dim); }
.py-cmd .py-warn { color: var(--danger); }
.py-cmd .py-cmdline { color: #b8e0a0; }

/* ---- timeline ---- */
.dag-timeline {
  grid-area: timeline;
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 8px 14px;
}
.dag-transport {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}
.dag-transport-btn { min-width: 34px; text-align: center; }
.dag-frame-field {
  width: 70px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 5px 6px;
  margin-left: 8px;
}
.dag-fps-label { color: var(--text-dim); font-size: 12px; margin-left: 6px; }
.dag-ruler-wrap { flex: 1 1 auto; position: relative; }
.dag-ruler {
  position: relative;
  height: 44px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  overflow: hidden;
}
.dag-ruler-ticks { position: absolute; inset: 0; }
.dag-tick { position: absolute; top: 0; bottom: 0; width: 1px; background: var(--border); }
.dag-tick-end { background: #4a5062; }
.dag-tick-label {
  position: absolute; top: 4px; left: 3px;
  font-size: 10px; color: var(--text-dim);
  white-space: nowrap;
}
.dag-playhead {
  position: absolute; top: 0; bottom: 0; width: 2px;
  background: var(--accent-2);
  box-shadow: 0 0 4px rgba(255,200,92,0.7);
  pointer-events: none;
}

/* ---- modal ---- */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
}
.modal-box {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 18px 20px;
  min-width: 320px;
  max-width: 90vw;
  max-height: 86vh;
  overflow-y: auto;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}
.modal-box h3 { margin: 0 0 12px; color: var(--accent-2); font-size: 15px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.modal-note { color: var(--text-dim); font-size: 12px; margin-bottom: 12px; line-height: 1.5; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb { background: var(--bg-3); border-radius: 5px; border: 1px solid var(--border); }