:root{--bg:#f3f6fb;--card:#fff;--text:#172033;--muted:#667085;--line:#e4e8ef;--primary:#2563eb;--primary2:#1d4ed8;--green:#22c55e;--shadow:0 18px 50px rgba(22,34,63,.10)}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--text);background:var(--bg)}body{min-height:100vh}.center-page{display:grid;place-items:center;padding:24px}.card{background:var(--card);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}.landing-card{width:min(560px,100%);padding:34px;text-align:center}.brand{font-size:22px;font-weight:800;letter-spacing:-.5px}.brand span{color:var(--primary)}h1{font-size:clamp(28px,4vw,42px);letter-spacing:-1px;margin:18px 0 10px}.lead,.composer p{color:var(--muted);line-height:1.55}.qr-shell{display:inline-flex;background:#fff;border:1px solid var(--line);padding:18px;border-radius:22px;margin:18px 0 12px}.qr-shell canvas{display:block;max-width:78vw;height:auto}.status{display:flex;align-items:center;justify-content:center;gap:10px;font-weight:650}.dot{width:10px;height:10px;border-radius:50%;background:#cbd5e1;display:inline-block}.dot.online{background:var(--green);box-shadow:0 0 0 5px rgba(34,197,94,.14)}details{margin-top:18px;color:var(--muted)}summary{cursor:pointer}.manual-link{display:flex;gap:8px;margin-top:12px}.manual-link input{min-width:0;flex:1;padding:10px;border:1px solid var(--line);border-radius:10px}.manual-link button,.button,.mini-button{appearance:none;border:0;background:#eef2ff;color:#1e40af;border-radius:11px;padding:10px 14px;font-weight:750;text-decoration:none;cursor:pointer}.topbar{height:68px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(18px,calc((100vw - 1180px)/2));position:sticky;top:0;z-index:5}.peer{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:14px}.workspace{width:min(1180px,calc(100% - 28px));margin:28px auto;display:grid;grid-template-columns:minmax(300px,420px) 1fr;gap:24px;align-items:start}.composer,.feed{padding:26px}.composer h1{font-size:30px;margin-top:0}.composer textarea{width:100%;min-height:150px;resize:vertical;border:1px solid var(--line);border-radius:14px;padding:14px;font:inherit;outline:none}.composer textarea:focus{border-color:#93b4fd;box-shadow:0 0 0 4px rgba(37,99,235,.08)}.button{display:inline-flex;justify-content:center;align-items:center}.button.primary{width:100%;margin-top:10px;background:var(--primary);color:#fff}.button.primary:hover{background:var(--primary2)}.separator{display:flex;align-items:center;gap:12px;color:#98a2b3;margin:18px 0}.separator:before,.separator:after{content:"";height:1px;background:var(--line);flex:1}.dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:120px;border:2px dashed #cbd5e1;border-radius:16px;color:var(--muted);cursor:pointer;transition:.15s}.dropzone strong{color:var(--primary);margin-bottom:4px}.dropzone input{display:none}.dropzone.drag{border-color:var(--primary);background:#eff6ff}.upload-status{min-height:22px;color:var(--muted);font-size:13px;margin-top:8px}.feed-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:16px}.feed-head h2{margin:0;font-size:20px}.feed-head span{background:#f2f4f7;border-radius:999px;padding:4px 9px;font-size:13px;color:var(--muted)}.items{display:flex;flex-direction:column;gap:12px;margin-top:18px}.empty{text-align:center;color:#98a2b3;padding:42px 12px}.item{border:1px solid var(--line);border-radius:16px;padding:14px;display:flex;justify-content:space-between;gap:14px;align-items:center}.item-main{min-width:0;display:flex;gap:12px;align-items:center;flex:1}.text-item .item-main{display:block}.type-label{font-size:11px;font-weight:800;color:#667085;text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px}.text-content{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.45}.file-icon{width:40px;height:40px;border-radius:12px;background:#eef2ff;color:#1e40af;display:grid;place-items:center;font-weight:900;font-size:20px;flex:0 0 auto}.file-name{font-weight:750;overflow-wrap:anywhere}.file-size{font-size:12px;color:var(--muted);margin-top:3px}.mini-button{white-space:nowrap}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#101828;color:#fff;padding:11px 16px;border-radius:12px;box-shadow:var(--shadow);z-index:20}@media(max-width:760px){.workspace{grid-template-columns:1fr;margin-top:16px}.topbar{padding:0 16px}.peer{font-size:12px}.composer,.feed{padding:20px}.landing-card{padding:24px}.item{align-items:flex-start;flex-direction:column}.item .mini-button{align-self:stretch;text-align:center}.manual-link{flex-direction:column}}