*{box-sizing:border-box}html,body,#app{height:100%;margin:0;font-family:-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,PingFang SC,Microsoft YaHei,sans-serif;background:#f3f4f6;color:#1f2937}a{color:#2563eb;text-decoration:none}button{cursor:pointer}.auth-wrap{min-height:100%;display:flex;align-items:center;justify-content:center}.auth-card{width:360px;background:#fff;border-radius:12px;padding:32px;box-shadow:0 10px 30px #00000014}.auth-card h1{margin:0 0 24px;font-size:22px;text-align:center}.auth-card input{width:100%;padding:10px 12px;margin-bottom:12px;border:1px solid #d1d5db;border-radius:8px;font-size:14px}.auth-card button{width:100%;padding:10px;background:#2563eb;color:#fff;border:0;border-radius:8px;font-size:14px}.auth-card .hint{text-align:center;margin-top:12px;font-size:13px;color:#6b7280}.auth-card .error{color:#dc2626;font-size:13px;margin-bottom:8px;text-align:center}.chat{display:flex;height:100%}.sidebar{width:280px;background:#fff;border-right:1px solid #e5e7eb;display:flex;flex-direction:column}.sidebar .me{padding:16px;border-bottom:1px solid #e5e7eb;display:flex;justify-content:space-between;align-items:center}.sidebar .me .name{font-weight:600}.sidebar .me .logout{color:#6b7280;font-size:12px;background:none;border:0}.sidebar .search{padding:12px;border-bottom:1px solid #e5e7eb;display:flex;gap:6px}.sidebar .search input{flex:1;padding:6px 8px;border:1px solid #d1d5db;border-radius:6px;font-size:13px}.sidebar .search button{padding:6px 10px;border:0;border-radius:6px;background:#e5e7eb;font-size:13px}.sidebar .list{flex:1;overflow-y:auto}.sidebar .item{padding:12px 16px;border-bottom:1px solid #f3f4f6;cursor:pointer;display:flex;justify-content:space-between;align-items:center}.sidebar .item:hover,.sidebar .item.active{background:#f3f4f6}.sidebar .item .nick{font-size:14px}.sidebar .item .un{color:#9ca3af;font-size:12px}.sidebar .item .add{font-size:12px;color:#2563eb;background:none;border:0}.main{flex:1;display:flex;flex-direction:column}.main .header{padding:16px;background:#fff;border-bottom:1px solid #e5e7eb;font-weight:600}.main .header .status{font-size:12px;color:#9ca3af;font-weight:400;margin-left:8px}.messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:8px}.empty{color:#9ca3af;margin:auto}.msg{max-width:70%;padding:8px 12px;border-radius:12px;font-size:14px;line-height:1.4;word-wrap:break-word}.msg.mine{align-self:flex-end;background:#2563eb;color:#fff;border-bottom-right-radius:4px}.msg.theirs{align-self:flex-start;background:#fff;border:1px solid #e5e7eb;border-bottom-left-radius:4px}.msg .meta{font-size:11px;opacity:.7;margin-top:4px}.composer{padding:12px;background:#fff;border-top:1px solid #e5e7eb;display:flex;gap:8px}.composer textarea{flex:1;resize:none;height:48px;padding:8px 12px;border:1px solid #d1d5db;border-radius:8px;font-family:inherit;font-size:14px}.composer button{padding:0 20px;border:0;border-radius:8px;background:#2563eb;color:#fff}.composer button:disabled{background:#9ca3af}.ws-indicator{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px}.ws-indicator.on{background:#10b981}.ws-indicator.off{background:#ef4444}