:root{--brand:#0b6bcb;--brand-dark:#0857a6;--bg:#eef2f7;--card:#fff;--text:#17202b;--muted:#6b7686;--line:#dde3ea;--mine:#0b6bcb;--danger:#d93a3a;--safe-b:env(safe-area-inset-bottom,0px)}*{box-sizing:border-box}html,body{height:100%;margin:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}button{font:inherit;cursor:pointer}input,textarea{font:inherit}.app{background:var(--bg);flex-direction:column;max-width:820px;height:100dvh;margin:0 auto;display:flex;position:relative}@media (min-width:840px){.app{border-left:1px solid var(--line);border-right:1px solid var(--line)}}.header{background:var(--card);border-bottom:1px solid var(--line);z-index:5;align-items:center;gap:8px;padding:6px 12px;display:flex;position:sticky;top:0}.logo{border-radius:8px;flex:none;width:28px;height:28px}.title{flex:1;min-width:0}.title h1{margin:0;font-size:15px;line-height:1.15}.title p{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;margin:1px 0 0;font-size:12px;overflow:hidden}.chip{border:1px solid var(--line);color:var(--text);background:#f6f8fb;border-radius:999px;align-items:center;gap:6px;max-width:46vw;padding:4px 10px;font-size:13px;display:inline-flex}.chip span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.dot{background:#2fb36b;border-radius:50%;flex:none;width:8px;height:8px}.dot.off{background:#c9a227}.filters{background:var(--card);border-bottom:1px solid var(--line);scrollbar-width:none;flex:none;gap:8px;padding:8px 12px;display:flex;overflow-x:auto}.filters::-webkit-scrollbar{display:none}.fchip{border:1px solid var(--line);color:var(--text);cursor:pointer;background:#f6f8fb;border-radius:999px;flex:none;align-items:center;gap:6px;padding:6px 14px;font-size:14px;display:inline-flex}.fchip:hover{background:#edf2f8}.fchip.on{background:var(--brand);border-color:var(--brand);color:#fff}.fchip .n{min-width:18px;color:var(--brand);text-align:center;background:#e1eaf5;border-radius:999px;padding:0 5px;font-size:12px;line-height:18px}.fchip.on .n{color:#fff;background:#ffffff40}.feed{overscroll-behavior:contain;flex-direction:column;flex:1;gap:10px;padding:14px 12px 8px;display:flex;overflow-y:auto}.empty{text-align:center;color:var(--muted);max-width:340px;margin:auto;padding:24px;font-size:14px;line-height:1.5}.empty .big{margin-bottom:8px;font-size:40px}.row{flex-direction:column;align-items:flex-start;max-width:100%;display:flex}.row.mine{align-items:flex-end}.meta{color:var(--muted);flex-wrap:wrap;align-items:center;gap:6px;margin:0 6px 3px;font-size:11.5px;display:flex}.meta .who{color:#3d4a5c;font-weight:600}.bubble{background:var(--card);border:1px solid var(--line);word-wrap:break-word;overflow-wrap:anywhere;white-space:pre-wrap;border-radius:6px 16px 16px;max-width:min(78vw,560px);padding:9px 12px;font-size:15px;line-height:1.42;box-shadow:0 1px 1px #00000008}.row.mine .bubble{background:var(--mine);color:#fff;border-color:var(--mine);border-top-left-radius:16px;border-top-right-radius:6px}.row.mine .bubble a{color:#fff}.bubble a{color:var(--brand)}.actions{gap:4px;margin:3px 4px 0;display:flex}.act{color:var(--muted);background:0 0;border:none;border-radius:8px;padding:3px 7px;font-size:12px}.act:hover{color:var(--text);background:#0000000d}.act.danger:hover{color:var(--danger)}.filecard{background:var(--card);border:1px solid var(--line);border-radius:14px;align-items:center;gap:10px;width:min(78vw,360px);padding:10px;display:flex}.row.mine .filecard{background:#f3f8fe;border-color:#b9d3ef}.ficon{width:42px;height:48px;color:var(--brand-dark);text-transform:uppercase;background:#e8eef6;border-radius:8px;flex:none;justify-content:center;align-items:flex-end;padding-bottom:6px;font-size:10px;font-weight:700;display:flex;position:relative}.ficon:before{content:"";border-style:solid;border-width:0 12px 12px 0;border-color:var(--bg) var(--bg) #c9d6e6 #c9d6e6;border-radius:0 0 0 3px;position:absolute;top:0;right:0}.finfo{flex:1;min-width:0}.fname{text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:600;overflow:hidden}.fsize{color:var(--muted);margin-top:2px;font-size:12px}.dl{background:var(--brand);color:#fff;border:none;border-radius:10px;flex:none;align-items:center;gap:5px;padding:8px 12px;font-size:13px;font-weight:600;text-decoration:none;display:inline-flex}.dl:hover{background:var(--brand-dark)}.imgwrap{flex-direction:column;gap:6px;width:min(78vw,360px);display:flex}.thumb{object-fit:cover;border:1px solid var(--line);background:#dfe6ee;border-radius:14px;width:100%;max-height:360px;display:block}.imgbar{align-items:center;gap:8px;display:flex}.imgbar .finfo{color:var(--muted);font-size:12px}.progress{background:#dbe5f0;border-radius:99px;height:6px;margin-top:6px;overflow:hidden}.progress>div{background:var(--brand);height:100%;transition:width .2s}.err{color:var(--danger);margin-top:4px;font-size:12px}.composer{padding:8px 10px calc(8px + var(--safe-b));background:var(--card);border-top:1px solid var(--line);align-items:flex-end;gap:6px;display:flex}.iconbtn{width:42px;height:42px;color:var(--brand);background:#edf2f8;border:none;border-radius:50%;flex:none;justify-content:center;align-items:center;display:flex}.iconbtn:hover{background:#e1eaf5}.iconbtn.send{background:var(--brand);color:#fff}.iconbtn.send:disabled{cursor:default;background:#b8c7d8}.composer textarea{resize:none;border:1px solid var(--line);background:#f6f8fb;border-radius:21px;outline:none;flex:1;min-width:0;min-height:42px;max-height:140px;padding:10px 14px;font-size:16px;line-height:1.3}.composer textarea:focus{border-color:var(--brand);background:#fff}.hint{text-align:center;color:var(--muted);background:var(--card);padding:0 10px 6px;font-size:11.5px}@media (max-width:640px){.hint .desk{display:none}}.drop{border:3px dashed var(--brand);color:var(--brand-dark);z-index:20;pointer-events:none;background:#0b6bcb1f;border-radius:12px;justify-content:center;align-items:center;font-size:18px;font-weight:700;display:flex;position:absolute;inset:0}.toast{color:#fff;z-index:30;text-align:center;background:#1f2a37;border-radius:10px;max-width:90%;padding:9px 14px;font-size:13.5px;position:absolute;bottom:96px;left:50%;transform:translate(-50%);box-shadow:0 6px 18px #0000002e}.gate{justify-content:center;align-items:center;min-height:100dvh;padding:20px;display:flex}.gatecard{background:var(--card);border:1px solid var(--line);text-align:center;border-radius:18px;width:100%;max-width:360px;padding:26px 22px;box-shadow:0 10px 30px #14285014}.gatecard img{border-radius:14px;width:56px;height:56px}.gatecard h1{margin:12px 0 4px;font-size:20px}.gatecard p{color:var(--muted);margin:0 0 18px;font-size:14px}.codeinput{letter-spacing:10px;text-align:center;border:1px solid var(--line);background:#f6f8fb;border-radius:12px;outline:none;width:100%;padding:12px;font-size:26px}.codeinput:focus{border-color:var(--brand);background:#fff}.primary{background:var(--brand);color:#fff;border:none;border-radius:12px;width:100%;margin-top:12px;padding:12px;font-size:15px;font-weight:700}.primary:disabled{opacity:.6}.modal{z-index:40;background:#0f192873;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal .gatecard{text-align:left}.modal input[type=text]{border:1px solid var(--line);border-radius:10px;outline:none;width:100%;padding:11px 12px;font-size:16px}.modal .row2{gap:8px;margin-top:12px;display:flex}.ghost{color:var(--text);background:#edf2f8;border:none;border-radius:12px;flex:1;padding:12px;font-weight:600}.modal .primary{flex:1;margin-top:0}.link{color:var(--muted);background:0 0;border:none;margin-top:14px;padding:0;font-size:13px;text-decoration:underline}.title p b{color:var(--text);font-weight:600}