:root {
  --bg: #1e1f24;
  --panel: #26282f;
  --panel2: #2f323b;
  --border: #3c404b;
  --text: #e6e6e6;
  --muted: #9aa0ad;
  --accent: #3b82f6;
  --accent2: #2563eb;
  --danger: #ef4444;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  font: 13px/1.4 system-ui, -apple-system, "Segoe UI", "Yu Gothic UI", Meiryo, sans-serif;
  color: var(--text);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
}
h2 { font-size: 12px; margin: 0 0 6px; color: var(--muted); letter-spacing: .05em; text-transform: uppercase; }
button, select, input, textarea {
  font: inherit;
  color: var(--text);
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
}
button { cursor: pointer; white-space: nowrap; }
button:hover { background: #3a3e48; }
button:active { background: #444957; }
button:disabled { opacity: .4; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent2); color: #fff; }
button.primary:hover { background: var(--accent2); }
button.danger { color: #fff; background: var(--danger); border-color: #b91c1c; }
button.active { background: var(--accent); border-color: var(--accent2); color: #fff; }
input[type=number] { width: 68px; padding: 3px 4px; }
input[type=color] { width: 32px; height: 26px; padding: 1px; }
input[type=range] { width: 100%; padding: 0; background: transparent; border: none; }
input[type=checkbox] { margin: 0 4px 0 0; }
textarea { width: 100%; min-height: 60px; resize: vertical; }
label { display: inline-flex; align-items: center; gap: 4px; }
.hint { color: var(--muted); }
.sep { width: 1px; height: 22px; background: var(--border); margin: 0 4px; }

/* ---------- ツールバー ---------- */
#toolbar { background: var(--panel); border-bottom: 1px solid var(--border); }
#toolbar .bar { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; padding: 6px 10px; }
#tools { border-top: 1px solid var(--border); background: var(--bg); }
#tools input[type=range] { width: 110px; }
#tools .val { min-width: 28px; text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
#tools .hint { margin-left: 6px; }
#toolbar .group { display: flex; align-items: center; gap: 4px; }
#toolbar .group.right { margin-left: auto; }
#zoomLabel { min-width: 48px; text-align: center; color: var(--muted); }

/* ---------- メイン ---------- */
main { flex: 1; display: flex; min-height: 0; }
#stage {
  flex: 1; position: relative; overflow: hidden; background: #15161a;
  background-image: radial-gradient(#25262c 1px, transparent 1px); background-size: 20px 20px;
}
#stage canvas { position: absolute; left: 0; top: 0; }
#overlay { touch-action: none; }
#dropHint {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; pointer-events: none;
}
#dropHint > div {
  background: rgba(30,31,36,.92); color: var(--text); border: 1px dashed var(--border); border-radius: 8px;
  padding: 18px 28px; text-align: center; font-size: 18px;
}
#dropHint .sub { font-size: 13px; color: var(--muted); margin-top: 6px; }
#stage.dragover { outline: 3px dashed var(--accent); outline-offset: -6px; }
#toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 100; max-width: min(90vw, 640px);
  background: #b0362f; color: #fff; padding: 10px 16px; border-radius: 6px; font-size: 13px; line-height: 1.5;
  white-space: pre-wrap; word-break: break-all; box-shadow: 0 4px 16px rgba(0,0,0,.4); cursor: pointer;
}
#loadError .dialog { width: 560px; }
#loadError ul { padding-left: 20px; line-height: 1.7; }
#loadError a { color: var(--accent); }
#cropBar, #restoreBar {
  position: absolute; left: 50%; top: 12px; transform: translateX(-50%);
  display: flex; gap: 8px; align-items: center;
  background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 6px 10px;
  box-shadow: 0 4px 16px rgba(0,0,0,.4);
}

/* ---------- サイドパネル ---------- */
#side {
  width: 300px; display: flex; flex-direction: column; background: var(--panel); border-left: 1px solid var(--border);
  min-height: 0;
}
#side section { padding: 10px; }
#layersPanel { flex: 0 0 auto; max-height: 45%; display: flex; flex-direction: column; border-bottom: 1px solid var(--border); }
#layersPanel .row { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 6px; }
#layerList { list-style: none; margin: 0; padding: 0; overflow-y: auto; min-height: 60px; }
#layerList li {
  display: flex; align-items: center; gap: 6px; padding: 4px 6px; border-radius: 4px; cursor: pointer;
  border: 1px solid transparent;
}
#layerList li:hover { background: var(--panel2); }
#layerList li.sel { background: #2b3a55; border-color: var(--accent); }
#layerList li.dragover-top { border-top: 2px solid var(--accent); }
#layerList li.dragover-bottom { border-bottom: 2px solid var(--accent); }
#layerList li.hidden .name { opacity: .45; }
#layerList .thumb { width: 36px; height: 36px; background: #666; border-radius: 3px; flex: none; }
#layerList .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#layerList .name input { width: 100%; padding: 2px 4px; }
#layerList .icon { background: none; border: none; padding: 2px 4px; font-size: 14px; opacity: .8; }
#layerList .icon.off { opacity: .3; }

#propsPanel { flex: 1; overflow-y: auto; }
#props .sec { margin-bottom: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
#props .sec h3 { font-size: 12px; margin: 0 0 6px; color: var(--muted); }
#props .row { display: flex; align-items: center; gap: 6px; margin-bottom: 5px; flex-wrap: wrap; }
#props .row > .lbl { width: 64px; flex: none; color: var(--muted); }
#props .row input[type=text], #props .row select { flex: 1; min-width: 0; }
#props .row .val { width: 40px; text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
#props .row input[type=range] { flex: 1; }
#props .btns { display: flex; gap: 4px; flex-wrap: wrap; }

/* ---------- モーダル ---------- */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.55); display: flex; align-items: center; justify-content: center; z-index: 10; }
.dialog { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 16px 18px; width: 380px; max-width: 95vw; box-shadow: 0 8px 32px rgba(0,0,0,.5); }
.dialog h2 { font-size: 15px; text-transform: none; color: var(--text); margin-bottom: 12px; }
.dialog .field { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.dialog .field > input[type=text], .dialog .field > select { flex: 1; }
.dialog .field.check { display: flex; }
.dialog .row { display: flex; gap: 8px; margin-top: 14px; }
.dialog .row.end { justify-content: flex-end; }