:root {
  --bg: #0e0e10;
  --panel: #16161a;
  --line: #26262c;
  --text: #e6e6ea;
  --dim: #8b8b96;
  --accent: #ff4f8b;
  --accent2: #46e0ff;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font: 12px/1.35 ui-sans-serif, -apple-system, "Helvetica Neue", Helvetica, Arial, sans-serif;
  display: grid; grid-template-rows: auto 1fr auto; overflow: hidden;
}
header {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 8px 12px; border-bottom: 1px solid var(--line); background: var(--panel);
}
.brand { font-weight: 700; font-size: 14px; letter-spacing: 0.02em; white-space: nowrap; }
.brand span { font-weight: 400; color: var(--dim); margin-left: 6px; font-size: 12px; }
.actions { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.sep { width: 1px; height: 18px; background: var(--line); margin: 0 4px; }
button, select, input[type=number] {
  font: inherit; color: var(--text); background: #1f1f25; border: 1px solid #30303a; border-radius: 5px;
  padding: 5px 9px;
}
button { cursor: pointer; }
button:hover, select:hover { border-color: #4a4a58; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

main { display: grid; grid-template-columns: 1fr 340px; min-height: 0; }
#stage { position: relative; min-width: 0; min-height: 0; background: #111113; }
#view { position: absolute; inset: 0; width: 100%; height: 100%; display: block; cursor: grab; touch-action: none; }
#view:active { cursor: grabbing; }
#hud { position: absolute; left: 10px; bottom: 10px; display: flex; gap: 8px; align-items: center; pointer-events: none; }
#hud > * { pointer-events: auto; }
#zoom { background: rgba(20,20,24,.85); min-width: 56px; }
#zoomwarn { color: #ffd27a; background: rgba(20,20,24,.85); padding: 5px 8px; border-radius: 5px; border: 1px solid #3a3320; }
#droptip {
  position: absolute; inset: 16px; border: 2px dashed var(--accent2); border-radius: 12px; display: none;
  align-items: center; justify-content: center; font-size: 20px; color: var(--accent2); background: rgba(10,10,14,.6);
}
body.drag #droptip { display: flex; }

aside { border-left: 1px solid var(--line); background: var(--panel); overflow-y: auto; padding: 8px 10px 20px; }
.srcname { color: var(--dim); padding: 4px 2px 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sec { border-top: 1px solid var(--line); padding: 4px 0; }
.sec > summary {
  cursor: pointer; list-style: none; font-weight: 600; text-transform: uppercase; letter-spacing: .08em;
  font-size: 10.5px; color: var(--dim); padding: 6px 2px;
}
.sec > summary::before { content: "▸"; display: inline-block; width: 12px; transition: transform .15s; }
.sec[open] > summary::before { transform: rotate(90deg); }
.body { display: grid; gap: 5px; padding: 2px 2px 8px; }
.row { display: grid; grid-template-columns: 118px 1fr 64px; gap: 6px; align-items: center; }
.row.select, .row.number { grid-template-columns: 118px 1fr; }
.row.check { grid-template-columns: 1fr auto; }
.row label { color: #c4c4cc; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row label[title]:not([title=""]) { text-decoration: underline dotted #555; text-underline-offset: 3px; cursor: help; }
.row select { width: 100%; padding: 4px 6px; }
.num { width: 100%; padding: 3px 5px; text-align: right; font-variant-numeric: tabular-nums; }
.num.wide { width: 100%; }
input[type=range] { width: 100%; accent-color: var(--accent); }
input[type=checkbox] { accent-color: var(--accent); width: 15px; height: 15px; }
.foot { color: var(--dim); margin-top: 12px; }

footer { position: relative; padding: 6px 12px; border-top: 1px solid var(--line); background: var(--panel); color: var(--dim); font-variant-numeric: tabular-nums; }
#progress { position: absolute; left: 0; top: -1px; height: 2px; background: var(--accent2); transition: width .2s; }
#progress.done { background: #4be08a; }

@media (max-width: 820px) {
  main { grid-template-columns: 1fr; grid-template-rows: 55vh 1fr; }
  aside { border-left: 0; border-top: 1px solid var(--line); }
  .brand span { display: none; }
}