:root{--bg:#f7f7f5;--fg:#1d1d1b;--muted:#6b6b66;--card:#fff;--line:#e2e2dc;--accent:#1f5f8b;--accent-fg:#fff;
--warn-bg:#fff4d6;--warn-fg:#6a4b00;--err:#a33;--you:#eef3f7}
@media (prefers-color-scheme:dark){:root{--bg:#141413;--fg:#ececea;--muted:#a0a09a;--card:#1d1d1b;--line:#33332f;
--accent:#6fa8d6;--accent-fg:#0d1b26;--warn-bg:#3a3018;--warn-fg:#f1d58a;--err:#e88;--you:#1e2a33}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif}
.top{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:space-between;padding:12px 16px;
border-bottom:1px solid var(--line);background:var(--card)}
.brand{font-weight:600}
nav{display:flex;gap:4px;flex-wrap:wrap}
button{font:inherit;border:1px solid var(--accent);background:var(--accent);color:var(--accent-fg);border-radius:8px;
padding:8px 14px;cursor:pointer;min-height:40px}
button:disabled{opacity:.6;cursor:wait}
button.link,button.tab{background:transparent;color:var(--fg);border-color:transparent}
button.tab.on{border-color:var(--line);background:var(--bg)}
main{max-width:760px;margin:0 auto;padding:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;margin:12px 0}
.narrow{max-width:420px;margin:32px auto}
label{display:block;margin:10px 0 4px;font-size:14px;color:var(--muted)}
input,textarea,select{width:100%;font:inherit;padding:10px;border:1px solid var(--line);border-radius:8px;
background:var(--bg);color:var(--fg)}
form button{margin-top:12px}
.muted{color:var(--muted)}.small{font-size:13px}
.msg{min-height:1.5em;color:var(--err)}
.banner{background:var(--warn-bg);color:var(--warn-fg);padding:8px 16px;font-size:14px}
.thread{display:flex;flex-direction:column;gap:10px;margin:12px 0}
.bubble{padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--card);white-space:pre-wrap;
overflow-wrap:anywhere}
.bubble.you{background:var(--you);align-self:flex-end;max-width:90%}
.bubble .cites{margin:8px 0 0;padding-left:18px;font-size:13px;color:var(--muted)}
.bubble .tag{font-size:12px;color:var(--muted);margin-bottom:4px}
.ask textarea{resize:vertical}
.row{display:flex;gap:8px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.list{list-style:none;padding:0;margin:0}
.list li{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:8px 0;
overflow-wrap:anywhere}
.list li .actions{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.list li .actions button{min-height:34px;padding:4px 10px;font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px}
.stat b{display:block;font-size:20px}
footer{text-align:center;padding:24px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0}
.chips button{background:var(--card);color:var(--fg);border-color:var(--line);min-height:36px;padding:6px 12px}
.chips.big button{min-height:44px;font-weight:500}
.row.left{justify-content:flex-start}
.filebtn{display:inline-flex;align-items:center;margin:12px 0 0;padding:8px 12px;border:1px solid var(--line);
border-radius:8px;color:var(--fg);cursor:pointer;min-height:40px;font-size:15px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.fb{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin-top:8px;font-size:13px;color:var(--muted)}
.fb button{min-height:30px;padding:2px 10px;font-size:13px;background:transparent;color:var(--fg);border-color:var(--line)}
.fb button.on{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
table.wk{width:100%;border-collapse:collapse;margin:8px 0 16px;font-size:14px}
table.wk th,table.wk td{text-align:left;padding:6px 8px;border-bottom:1px solid var(--line)}
table.wk td.n,table.wk th.n{text-align:right;font-variant-numeric:tabular-nums}
@media print{.top,nav,footer,.noprint{display:none}body{background:#fff;color:#000}}