:root{color:#202726;font-synthesis:none;text-rendering:optimizelegibility;--ink:#202726;--muted:#6b7774;--line:#dfe5e2;--line-strong:#cbd5d1;--surface:#fff;--surface-soft:#f5f7f5;--surface-warm:#fbf8f2;--brand:#0f766e;--brand-dark:#0b5c56;--brand-soft:#e4f2ef;--accent:#c15f3c;--danger:#b42318;--sidebar:#18201f;--sidebar-muted:#a8b5b1;background:#f5f7f5;font-family:Inter,Segoe UI,PingFang SC,Microsoft YaHei,system-ui,sans-serif}*{box-sizing:border-box;letter-spacing:0}html,body,#root{width:100%;height:100%;margin:0;overflow:hidden}body{min-width:320px}button,input,textarea,select{font:inherit}button{color:inherit}button:not(:disabled){cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}input,textarea,select{color:var(--ink);border:1px solid var(--line-strong);background:#fff;border-radius:6px;outline:0;transition:border-color .16s,box-shadow .16s}input:focus,textarea:focus,select:focus{border-color:var(--brand);box-shadow:0 0 0 3px #0f766e1f}.spin{animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.brand-lockup{align-items:center;gap:10px;font-size:14px;font-weight:800;display:inline-flex}.brand-lockup--large{font-size:18px}.brand-mark{color:#fff;background:var(--brand);border-radius:6px;flex:none;place-items:center;width:36px;height:36px;display:inline-grid}.brand-lockup--large .brand-mark{width:44px;height:44px}.primary-button,.secondary-button{border-radius:6px;justify-content:center;align-items:center;gap:8px;min-height:38px;padding:0 14px;font-weight:700;display:inline-flex}.primary-button{color:#fff;background:var(--brand);border:1px solid var(--brand)}.primary-button:hover:not(:disabled){background:var(--brand-dark)}.secondary-button{color:var(--ink);border:1px solid var(--line-strong);background:#fff}.secondary-button:hover:not(:disabled){background:var(--surface-soft)}.icon-button{width:36px;height:36px;color:var(--muted);background:0 0;border:0;border-radius:6px;flex:0 0 36px;place-items:center;padding:0;display:inline-grid}.icon-button:hover:not(:disabled){color:var(--ink);background:#edf1ef}.danger-hover:hover:not(:disabled){color:var(--danger);background:#fff0ee}.segmented{background:#edf1ef;border-radius:7px;padding:3px;display:inline-flex}.segmented button{min-height:34px;color:var(--muted);background:0 0;border:0;border-radius:5px;padding:0 16px;font-weight:700}.segmented button.active{color:var(--ink);background:#fff;box-shadow:0 1px 3px #1c27241f}.segmented.compact button{min-height:30px;padding:0 11px;font-size:12px}.boot-screen{height:100%;color:var(--brand);justify-content:center;align-items:center;gap:16px;display:flex}.auth-shell{background:var(--surface);grid-template-columns:minmax(380px,.9fr) minmax(460px,1.1fr);width:100%;height:100%;display:grid}.auth-brand{color:#eef8f5;background:var(--sidebar);flex-direction:column;justify-content:center;padding:64px max(48px,8vw);display:flex}.auth-brand .brand-mark{color:var(--sidebar);background:#8cd6c8}.auth-brand h1{max-width:520px;margin:64px 0 20px;font-size:44px;font-weight:760;line-height:1.17}.auth-brand p{color:#b9c9c5;max-width:440px;margin:0;font-size:17px;line-height:1.8}.auth-trust{color:#8cd6c8;align-items:center;gap:9px;margin-top:40px;font-size:13px;font-weight:650;display:flex}.auth-panel{background:#f8faf9;place-items:center;min-width:0;padding:40px;display:grid}.auth-form-wrap{width:min(100%,410px)}.auth-mobile-brand{display:none}.auth-tabs{margin-bottom:34px}.auth-form-wrap h2{margin:0 0 28px;font-size:26px;line-height:1.25}.auth-form-wrap form{flex-direction:column;display:flex}.field-label{color:#4b5754;margin:0 0 7px;font-size:13px;font-weight:700}.auth-form-wrap input{width:100%;height:46px;margin-bottom:19px;padding:0 13px}.password-field{position:relative}.password-field input{padding-right:48px}.password-field .icon-button{position:absolute;top:5px;right:5px}.form-error{border-left:3px solid var(--danger);color:#842c23;background:#fff1ef;margin:-2px 0 16px;padding:10px 12px;font-size:13px;line-height:1.5}.auth-submit{width:100%;height:46px;margin-top:5px}.app-shell{background:var(--surface-soft);grid-template-columns:236px minmax(0,1fr);width:100%;height:100%;display:grid}.app-main{min-width:0;min-height:0}.sidebar{color:#e9f1ef;background:var(--sidebar);border-right:1px solid #2b3533;flex-direction:column;min-height:0;padding:22px 14px 14px;display:flex}.sidebar-brand{height:48px;margin:0 9px 23px}.sidebar-brand .brand-mark{color:#14201e;background:#6fc8b9;width:32px;height:32px}.sidebar-nav{flex-direction:column;gap:4px;display:flex}.sidebar-nav button{width:100%;height:42px;color:var(--sidebar-muted);text-align:left;background:0 0;border:0;border-radius:6px;grid-template-columns:23px minmax(0,1fr) auto;align-items:center;gap:9px;padding:0 11px;font-size:13px;font-weight:650;display:grid}.sidebar-nav button:hover{color:#fff;background:#222d2b}.sidebar-nav button.active{color:#fff;background:#2a3734}.sidebar-nav button.active svg{color:#75d0c0}.sidebar-nav em{color:#9eaaa7;text-align:center;background:#101716;border-radius:8px;min-width:22px;padding:2px 6px;font-size:10px;font-style:normal}.sidebar-storage{color:#93a19d;border-top:1px solid #303a38;border-bottom:1px solid #303a38;grid-template-columns:22px 1fr;gap:9px;margin-top:auto;padding:13px 10px;display:grid}.sidebar-storage div{justify-content:space-between;align-items:center;gap:8px;display:flex}.sidebar-storage span{font-size:11px}.sidebar-storage strong{color:#c8d3d0;font-size:11px}.sidebar-account{grid-template-columns:minmax(0,1fr) 36px;align-items:center;gap:4px;margin-top:11px;display:grid}.account-device{color:#e8efed;text-align:left;background:0 0;border:0;border-radius:6px;grid-template-columns:34px minmax(0,1fr) 18px;align-items:center;gap:9px;min-width:0;height:52px;padding:0 7px;display:grid}.account-device:hover{background:#222d2b}.device-dot{color:#fff;border-radius:50%;place-items:center;width:32px;height:32px;font-size:12px;font-weight:800;display:grid}.account-device>span:nth-child(2){flex-direction:column;gap:3px;min-width:0;display:flex}.account-device strong{text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.account-device small{color:#8f9d99;align-items:center;gap:5px;font-size:10px;display:flex}.account-device i{background:#777;border-radius:50%;width:6px;height:6px}.account-device i.online{background:#55c999}.logout-button{color:#7f8c88;background:0 0;border:0;border-radius:6px;place-items:center;width:34px;height:34px;display:grid}.logout-button:hover{color:#ffb4a8;background:#342624}.mobile-nav{display:none}.workspace{background:var(--surface-soft);flex-direction:column;width:100%;min-width:0;height:100%;min-height:0;display:flex}.workspace-header{border-bottom:1px solid 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button{width:26px;height:26px;color:var(--muted);background:0 0;border:0;place-items:center;padding:0;display:grid}.filter-button{border:1px solid var(--line);height:38px;color:var(--muted);background:#fff;border-radius:6px;align-items:center;gap:7px;padding:0 11px;font-size:12px;font-weight:700;display:inline-flex}.filter-button.active{color:var(--brand-dark);background:var(--brand-soft);border-color:#9bc9c1}.filter-button em{color:#fff;background:var(--brand);border-radius:9px;place-items:center;min-width:17px;height:17px;font-size:10px;font-style:normal;display:grid}.filter-band{border-bottom:1px solid var(--line);background:#fbfcfb;flex:none;align-items:center;gap:16px;min-height:56px;padding:9px 28px;display:flex;overflow-x:auto}.filter-group{align-items:center;gap:8px;display:flex}.filter-group>span,.filter-field>span{color:var(--muted);white-space:nowrap;font-size:11px;font-weight:700}.filter-field{align-items:center;gap:8px;display:flex;position:relative}.filter-field select,.filter-field input{border-color:var(--line);appearance:none;height:32px;padding:0 28px 0 9px;font-size:12px}.filter-field svg{color:var(--muted);pointer-events:none;position:absolute;right:8px}.date-field input{width:128px;padding-right:7px}.text-button{color:var(--brand);background:0 0;border:0;padding:5px 7px;font-size:12px;font-weight:700}.selection-toolbar{color:#163c37;background:#e7f4f1;border-bottom:1px solid #afd5ce;flex:none;align-items:center;gap:8px;min-height:48px;padding:6px 25px;display:flex}.selection-toolbar strong{font-size:13px}.selection-toolbar>span{flex:1}.selection-toolbar>button:not(.icon-button){color:#28504a;background:0 0;border:0;border-radius:5px;align-items:center;gap:6px;height:34px;padding:0 10px;font-size:12px;font-weight:700;display:inline-flex}.selection-toolbar>button:hover{background:#ffffffb3}.selection-toolbar .danger-action{color:var(--danger)}.message-feed{scroll-behavior:smooth;flex:1;min-height:0;padding:18px max(22px,50% - 480px) 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17px;display:flex;position:relative}.message-row.own{justify-content:flex-end}.message-row.other{justify-content:flex-start}.message-column{flex-direction:column;max-width:min(72%,660px);display:flex}.message-row.own .message-column{align-items:flex-end}.message-row.other .message-column{align-items:flex-start}.message-sender{color:#7b8884;align-items:center;gap:5px;height:21px;padding:0 3px;font-size:10px;display:flex}.message-row.own .message-sender{flex-direction:row-reverse}.mini-avatar{color:#fff;border-radius:50%;place-items:center;width:17px;height:17px;font-size:9px;font-weight:800;display:grid}.message-bubble{border:1px solid var(--line);background:#fff;border-radius:7px;min-width:40px;min-height:38px;transition:box-shadow .15s,border-color .15s;overflow:hidden;box-shadow:0 1px 2px #18201f0a}.message-bubble:hover{box-shadow:0 3px 10px #18201f14}.message-bubble.selected{border-color:var(--brand);box-shadow:0 0 0 2px #0f766e29}.message-row.own 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minmax(0,1fr);align-items:center;gap:11px;width:min(360px,56vw);min-height:76px;padding:12px;display:grid}.file-glyph{width:42px;height:42px;color:var(--accent);background:#fbede8;border-radius:6px;place-items:center;display:grid}.file-copy{flex-direction:column;gap:6px;min-width:0;display:flex}.file-copy strong{text-overflow:ellipsis;white-space:nowrap;font-size:13px;overflow:hidden}.file-copy small{color:var(--muted);font-size:10px}.message-meta{color:#95a09d;align-items:center;gap:6px;min-height:21px;padding:2px 3px 0;font-size:9px;display:flex}.message-row.own .message-meta{flex-direction:row-reverse}.message-quick-actions{align-items:center;gap:2px;display:none}.message-row:hover .message-quick-actions{display:inline-flex}.message-quick-actions button{color:#76837f;background:0 0;border:0;border-radius:4px;place-items:center;width:25px;height:23px;padding:0;display:grid}.message-quick-actions button:hover{color:var(--brand);background:#e9efec}.select-check{color:#fff;background:#fff;border:1px solid #b9c4c0;border-radius:50%;place-items:center;width:22px;height:22px;padding:0;display:grid;position:absolute;top:28px}.message-row.own .select-check{right:-31px}.message-row.other .select-check{left:-31px}.select-check.checked{border-color:var(--brand);background:var(--brand)}.composer-zone{padding:10px max(20px, calc((100% - 960px) / 2)) max(12px, env(safe-area-inset-bottom));border-top:1px solid var(--line);background:#fffffff5;flex:none;position:relative}.composer{grid-template-columns:42px minmax(0,1fr) 42px;align-items:end;gap:8px;min-height:48px;display:grid}.composer-attach{align-self:end;height:42px}.composer-input-wrap{border:1px solid var(--line-strong);background:#f7f9f8;border-radius:7px;grid-template-columns:minmax(0,1fr) 38px;align-items:end;min-width:0;min-height:44px;display:grid}.composer-input-wrap:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px #0f766e1a}.composer textarea{resize:none;width:100%;min-height:42px;max-height:140px;box-shadow:none;background:0 0;border:0;padding:11px 5px 9px 12px;line-height:1.45;overflow-y:auto}.composer textarea:focus{box-shadow:none}.composer-mode{width:34px;height:34px;color:var(--muted);background:0 0;border:0;border-radius:5px;justify-content:center;align-items:center;gap:0;margin:4px;padding:0;display:flex}.composer-mode.active{color:#d8e8e5;background:#27312f}.send-button{color:#fff;background:var(--brand);border:0;border-radius:7px;place-items:center;width:42px;height:42px;padding:0;display:grid}.send-button:hover:not(:disabled){background:var(--brand-dark)}.upload-strip{flex-direction:column;gap:5px;margin-bottom:8px;display:flex}.upload-item{border:1px solid 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.secondary-button{min-height:36px;font-size:12px}.preview-stage{background:#202725;flex:1;place-items:center;min-height:0;display:grid;overflow:auto}.preview-stage>img{object-fit:contain;max-width:100%;max-height:100%}.preview-stage>video{background:#111;width:100%;height:100%;max-height:100%}.preview-stage>iframe{background:#fff;border:0;width:100%;height:100%}.text-preview{color:#dbe7e4;white-space:pre-wrap;overflow-wrap:anywhere;background:#202725;width:100%;height:100%;margin:0;padding:24px;font:13px/1.7 Cascadia Code,Consolas,monospace;overflow:auto}.generic-preview,.audio-preview{color:#d5dfdc;text-align:center;flex-direction:column;align-items:center;gap:13px;padding:30px;display:flex}.generic-preview strong,.audio-preview strong{overflow-wrap:anywhere;max-width:420px}.generic-preview span{color:#9eaaa7;font-size:12px}.audio-preview 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