:root { --bg:#fff; --fg:#1d2433; --muted:#6b7385; --line:#d9dde6; --accent:#1a56db; --accent-fg:#fff; --soft:#f3f5f9; --err:#b42318; --cell:#fff; --prev:#fff; }
@media (prefers-color-scheme: dark) { :root { --bg:#1c1f26; --fg:#e8ebf2; --muted:#9aa3b5; --line:#343a47; --accent:#6ea0ff; --accent-fg:#0b1220; --soft:#262a33; --err:#ff8a80; --cell:#22262e; --prev:#fff; } }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body { margin:0; padding:10px 12px; display:flex; flex-direction:column; gap:8px; font:13px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif; color:var(--fg); background:var(--bg); overflow:hidden; }
h1 { margin:0; font-size:16px; white-space:nowrap; }
.chip { font-size:12px; padding:2px 10px; border-radius:999px; background:var(--soft); color:var(--muted); white-space:nowrap; }
.chip.edit { background:var(--accent); color:var(--accent-fg); }
.muted { color:var(--muted); font-size:12px; }

/* khung: thanh trên + hai cột (ký hiệu | soạn thảo), vừa khít cửa sổ, không cuộn cả trang */
.top { display:flex; align-items:center; gap:12px; flex:none; }
.top input[type=search] { flex:1; padding:6px 12px; border:1px solid var(--line); border-radius:999px; background:var(--bg); color:var(--fg); font:inherit; }
.layout { flex:1; min-height:0; display:grid; grid-template-columns: minmax(380px, 1.1fr) minmax(340px, 1fr); gap:12px; }
.left, .right { min-height:0; display:flex; flex-direction:column; }
.right { gap:6px; overflow-y:auto; padding-right:2px; }

/* bảng ký hiệu: danh mục bên trái, lưới bên phải, cao hết cột */
.pal { flex:1; min-height:0; display:grid; grid-template-columns: 132px 1fr; gap:8px; border:1px solid var(--line); border-radius:10px; padding:8px; }
.cats { display:flex; flex-direction:column; min-height:0; }
.groups { display:flex; gap:3px; margin-bottom:6px; }
.groups button { flex:1; padding:3px 0; border:1px solid var(--line); border-radius:6px; background:transparent; color:var(--fg); font:inherit; cursor:pointer; }
.groups button.on { background:var(--accent); border-color:var(--accent); color:var(--accent-fg); }
.catlist { overflow-y:auto; flex:1; }
.catlist button { display:flex; align-items:center; gap:6px; width:100%; padding:4px 6px; border:0; border-radius:7px; background:transparent; color:var(--fg); font:inherit; font-size:12.5px; text-align:left; cursor:pointer; }
.catlist button .ic { width:20px; text-align:center; color:var(--muted); font-family:"STIX Two Math","Times New Roman",serif; flex:none; }
.catlist button.on { background:var(--accent); color:var(--accent-fg); }
.catlist button.on .ic { color:var(--accent-fg); }
.grid { overflow-y:auto; display:grid; grid-template-columns: repeat(auto-fill, minmax(70px, 1fr)); gap:5px; align-content:start; }
.cell { display:flex; flex-direction:column; align-items:center; justify-content:flex-start; gap:1px; min-height:56px; padding:4px 3px 3px; border:1px solid var(--line); border-radius:7px; background:var(--cell); color:var(--fg); font:inherit; cursor:pointer; }
.cell:hover:not(:disabled) { border-color:var(--accent); background:var(--soft); }
.cell:disabled { opacity:.35; cursor:default; }
.cell .face { height:26px; display:flex; align-items:center; justify-content:center; max-width:100%; }
.cell .face img { max-height:26px; max-width:64px; }
.cell .face .fb { font-family:"STIX Two Math","Times New Roman",serif; font-size:12px; color:var(--muted); }
.cell .nm { font-size:10px; line-height:1.1; color:var(--muted); text-align:center; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
@media (prefers-color-scheme: dark) { .cell .face img, .quick img { filter:invert(1) hue-rotate(180deg); } }
.none { grid-column:1/-1; padding:16px; color:var(--muted); text-align:center; }

.quick { display:flex; flex-wrap:wrap; gap:2px; padding:4px; border:1px solid var(--line); border-radius:9px; flex:none; }
.quick button { width:28px; height:28px; display:flex; align-items:center; justify-content:center; padding:0; border:1px solid transparent; border-radius:6px; background:transparent; cursor:pointer; color:var(--fg); }
.quick button:hover:not(:disabled) { background:var(--soft); border-color:var(--line); }
.quick button:disabled { opacity:.3; cursor:default; }
.quick img { max-width:24px; max-height:22px; }

.toolbar { display:flex; align-items:center; gap:8px; flex:none; }
.seg { display:flex; border:1px solid var(--line); border-radius:7px; overflow:hidden; }
.seg button { padding:3px 12px; border:0; background:transparent; color:var(--fg); font:inherit; cursor:pointer; }
.seg button.on { background:var(--accent); color:var(--accent-fg); }
.link { border:0; background:none; color:var(--accent); font:inherit; cursor:pointer; padding:2px 4px; }
.link:first-of-type { margin-left:auto; }
textarea { width:100%; flex:none; padding:7px; border:1px solid var(--line); border-radius:8px; background:var(--bg); color:var(--fg); font:13px/1.4 ui-monospace, Menlo, Consolas, monospace; resize:none; }
textarea:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline:2px solid var(--accent); outline-offset:1px; }
.preview { flex:1; min-height:90px; display:flex; align-items:center; justify-content:center; padding:10px; border:1px solid var(--line); border-radius:10px; background:var(--prev); overflow:auto; }
.preview img { max-width:100%; height:auto; }
.hint { color:#8a91a1; font-size:13px; }
.error { flex:none; margin:0; padding:6px 8px; border-radius:6px; background:var(--soft); color:var(--err); font:11.5px/1.4 ui-monospace, Menlo, monospace; white-space:pre-wrap; max-height:84px; overflow:auto; }
.row { display:flex; flex-wrap:wrap; gap:6px 12px; align-items:center; color:var(--muted); font-size:12.5px; flex:none; }
.row label { color:var(--fg); }
.row .inl { display:inline-flex; gap:8px; }
.row input[type=number] { width:56px; }
.row input[type=color] { width:30px; height:22px; padding:0; border:1px solid var(--line); background:none; vertical-align:middle; }
.actions { display:flex; flex-wrap:wrap; gap:6px; flex:none; }
.actions button, #bulkGo { padding:7px 12px; border:1px solid var(--line); border-radius:8px; background:var(--soft); color:var(--fg); font:inherit; cursor:pointer; }
.actions .primary { background:var(--accent); border-color:var(--accent); color:var(--accent-fg); font-weight:600; flex:1 1 auto; }
.actions button:disabled { opacity:.5; cursor:default; }
.more { flex:none; }
.more details { margin-top:6px; color:var(--muted); font-size:12.5px; }
.more details summary { cursor:pointer; }
.more details .row { margin-top:6px; }
select { padding:4px; border:1px solid var(--line); border-radius:6px; background:var(--bg); color:var(--fg); font:inherit; }
#history { list-style:none; margin:4px 0 0; padding:0; max-height:110px; overflow:auto; }
#history li button { width:100%; text-align:left; padding:3px 6px; border:0; background:none; color:var(--fg); font:12px ui-monospace, Menlo, monospace; cursor:pointer; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
#history li button:hover { background:var(--soft); }

/* khung hẹp (add-in trong Word): gọn, danh mục xếp hàng ngang, cuộn dọc cả trang nếu cần */
@media (max-width: 820px) {
  body { overflow:auto; height:auto; padding:8px 10px; gap:6px; }
  .top { flex-wrap:wrap; gap:6px 8px; }
  .top input[type=search] { flex:1 1 100%; order:3; padding:5px 10px; }
  .layout { display:block; }
  .left { margin-bottom:6px; }
  .pal { display:flex; flex-direction:column; height:auto; gap:4px; padding:6px; }
  .cats { flex-direction:column; flex:none; }
  .groups { margin-bottom:4px; }
  .catlist { display:flex; flex:none; overflow-x:auto; overflow-y:hidden; gap:3px; padding-bottom:3px; scrollbar-width:thin; }
  .catlist button { width:auto; flex:none; white-space:nowrap; padding:3px 8px; border:1px solid var(--line); border-radius:999px; font-size:12px; }
  .catlist button .ic { display:none; }
  .grid { height:168px; grid-template-columns: repeat(auto-fill, minmax(58px, 1fr)); gap:4px; }
  .cell { min-height:50px; padding:3px 2px 2px; }
  .cell .face { height:22px; }
  .cell .face img { max-height:22px; max-width:52px; }
  .cell .nm { font-size:9.5px; }
  .quick { padding:3px; }
  .quick button { width:26px; height:26px; }
  .right { overflow:visible; gap:5px; }
  textarea { rows:2; }
  .preview { min-height:84px; flex:none; padding:6px; }
  .actions button { padding:6px 10px; }
}