:root{font-family:Inter,"Microsoft YaHei",sans-serif;color:#20252d;background:#eef2f6}*{box-sizing:border-box}body{margin:0;min-height:100vh}.hidden{display:none!important}.auth{width:390px;margin:14vh auto;background:#fff;border-radius:24px;padding:38px;box-shadow:0 18px 60px #1c273312}.brand{display:flex;align-items:center;gap:13px;margin-bottom:28px}.brand h1{font-size:25px;margin:0;letter-spacing:-.5px}.brand p{color:#8a94a3;font-size:13px;margin:5px 0 0}.logo{display:grid;place-items:center;width:45px;height:45px;border-radius:14px;background:#2f7df6;color:#fff;font-size:28px;font-weight:700}.auth input{width:100%;margin:7px 0;padding:13px 14px;border:1px solid #e2e7ed;border-radius:11px;font-size:14px;outline:0}.auth input:focus,textarea:focus{border-color:#2f7df6}.auth button{width:100%;border:0;border-radius:11px;background:#2f7df6;color:#fff;padding:13px;margin-top:12px;font-size:14px;cursor:pointer}.auth .secondary{background:#eff5ff;color:#2f7df6}.error{min-height:19px;color:#e05252;font-size:13px}.chat{max-width:950px;height:100vh;margin:auto;background:#fff;display:flex;flex-direction:column;box-shadow:0 0 40px #24364d10}.chat header{height:76px;padding:0 28px;border-bottom:1px solid #edf0f4;display:flex;align-items:center;justify-content:space-between}.mini{margin:0}.mini .logo{width:38px;height:38px;border-radius:12px;font-size:23px}.mini h1{font-size:18px}.mini p{font-size:12px}.headerActions{display:flex;gap:16px;align-items:center;color:#8b95a2;font-size:12px}.iconBtn{border:0;background:none;color:#748092;cursor:pointer}.messages{flex:1;overflow:auto;padding:28px 8%;background:linear-gradient(#fbfcfd,#f5f8fb)}.message{display:flex;flex-direction:column;align-items:flex-end;margin:0 0 20px}.bubble{max-width:70%;padding:12px 15px;border-radius:16px 16px 3px 16px;background:#2f7df6;color:#fff;font-size:14px;line-height:1.6;white-space:pre-wrap;overflow-wrap:anywhere}.meta{color:#a3adba;font-size:11px;margin-top:5px}.fileCard{display:flex;gap:12px;align-items:center;min-width:230px;text-align:left}.fileIcon{font-size:25px}.fileName{font-weight:600;max-width:230px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.fileSize{font-size:11px;opacity:.8}.bubble a{color:inherit;text-decoration:underline}.empty{text-align:center;color:#a8b1bd;margin-top:20vh;font-size:14px}.composer{display:flex;gap:10px;align-items:flex-end;padding:16px 25px;border-top:1px solid #edf0f4}.composer textarea{flex:1;resize:none;border:1px solid #e1e6ed;border-radius:13px;padding:12px;font:14px inherit;min-height:44px;max-height:130px;outline:0}.attach,.send{height:44px;border:0;border-radius:12px;cursor:pointer}.attach{width:44px;display:grid;place-items:center;background:#f0f4f8;color:#627187;font-size:27px}.attach input{display:none}.send{padding:0 20px;background:#2f7df6;color:#fff}.dropHint{position:fixed;inset:30px;display:none;place-items:center;border:2px dashed #2f7df6;border-radius:22px;background:#2f7df622;color:#2f7df6;font-weight:700;font-size:20px;pointer-events:none}.dragging .dropHint{display:grid}@media(max-width:600px){.auth{width:auto;margin:8vh 18px;padding:28px}.messages{padding:22px 18px}.bubble{max-width:88%}.chat header{padding:0 16px}.composer{padding:12px}.send{padding:0 14px}}