:root,[data-theme=light]{--tg-blue:#3390ec;--tg-blue-hover:#2a82d8;--tg-blue-light:#e3f1fc;--bg-chat:#e4ecf2;--bg-chat-pattern:#d6e0e8;--bg-panel:#fff;--bg-panel-hover:#f4f4f5;--bg-input:#fff;--bg-out-bubble:#eeffde;--bg-out-bubble-hover:#e4f7d2;--bg-in-bubble:#fff;--text-primary:#000;--text-secondary:#707579;--text-tertiary:#a2acb4;--text-link:#3390ec;--text-out-meta:#4fae4e;--border-subtle:#e7e7e7;--field-border:#d9d9d9;--hint-bg:#f7f9fa;--shadow-bubble:0 1px 2px #10232f26;--shadow-panel:0 4px 24px #10232f2e;--shadow-lightbox:0 24px 64px #0009;--shadow-login-card:0 16px 48px #0000002e;--reaction-bg:#f1f8fe;--reaction-bg-mine:#cfe9fb;--reaction-border:#d6ebfa;--avatar-1:linear-gradient(135deg, #ff885e 0%, #ff516a 100%);--avatar-2:linear-gradient(135deg, #54cb68 0%, #1cb04a 100%);--avatar-3:linear-gradient(135deg, #82b1ff 0%, #665fff 100%);--login-bg:linear-gradient(135deg, #3390ec 0%, #2a6fb8 100%);--login-card-bg:#fff;--login-field-label-bg:#fff;--avatar-group:linear-gradient(135deg, #f5a623 0%, #f97316 100%);--radius-bubble:12px;--radius-bubble-tail:6px}[data-theme=dark]{--tg-blue:#3390ec;--tg-blue-hover:#4ba2f3;--tg-blue-light:#3390ec2e;--bg-chat:#0e1621;--bg-chat-pattern:#122131;--bg-panel:#17212b;--bg-panel-hover:#202b36;--bg-input:#242f3d;--bg-out-bubble:#2b5278;--bg-out-bubble-hover:#335c87;--bg-in-bubble:#182533;--text-primary:#fff;--text-secondary:#7d8e98;--text-tertiary:#5d6d75;--text-link:#62a3ed;--text-out-meta:#71bb71;--border-subtle:#1c2733;--field-border:#2d3947;--hint-bg:#1c2733;--shadow-bubble:0 1px 2px #0006;--shadow-panel:0 4px 24px #00000080;--shadow-lightbox:0 24px 64px #000c;--shadow-login-card:0 16px 48px #00000080;--reaction-bg:#1c3145;--reaction-bg-mine:#2e4d6b;--reaction-border:#2a405b;--login-bg:linear-gradient(135deg, #1a3e63 0%, #0e2034 100%);--login-card-bg:#17212b;--login-field-label-bg:#17212b;--avatar-group:linear-gradient(135deg, #f5a623 0%, #f97316 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cardIn{0%{opacity:0;transform:translateY(16px)scale(.96)}to{opacity:1;transform:none}}.login-logo{color:#fff;letter-spacing:-.5px;background:linear-gradient(135deg,#3390ec 0%,#2a6fb8 100%);border-radius:50%;justify-content:center;align-items:center;width:72px;height:72px;margin:0 auto 20px;font-size:30px;font-weight:700;display:flex}.login-title{text-align:center;color:var(--text-primary);margin-bottom:6px;font-size:22px;font-weight:600}.login-subtitle{color:var(--text-secondary);text-align:center;margin-bottom:28px;font-size:14px}.field{margin-bottom:14px;position:relative}.field input{border:1px solid var(--field-border);background:var(--login-card-bg);width:100%;color:var(--text-primary);border-radius:10px;padding:14px 52px 14px 14px;font-size:15px;transition:border-color .2s,box-shadow .2s}.field input:focus{border-color:var(--tg-blue);box-shadow:0 0 0 3px #3390ec1f}.field label{color:var(--text-tertiary);pointer-events:none;background:var(--login-field-label-bg);padding:0 4px;font-size:15px;transition:top .18s,font-size .18s,color .18s;position:absolute;top:14px;left:12px}.field input:focus+label,.field input:not(:placeholder-shown)+label{color:var(--tg-blue);font-size:12px;top:-7px}.field .toggle-visibility{width:44px;height:44px;color:var(--text-tertiary);border-radius:8px;justify-content:center;align-items:center;transition:background .15s,color .15s;display:flex;position:absolute;top:50%;right:4px;transform:translateY(-50%)}.field .toggle-visibility:hover{background:var(--bg-panel-hover);color:var(--text-secondary)}.login-submit{background:var(--tg-blue);color:#fff;border-radius:10px;width:100%;margin-top:6px;padding:13px;font-size:15px;font-weight:600;transition:background .15s,transform 50ms}.login-submit:hover:not(:disabled){background:var(--tg-blue-hover)}.login-submit:active:not(:disabled){transform:scale(.99)}.login-submit:disabled{opacity:.6;cursor:not-allowed}.field 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.unread-badge{color:var(--tg-blue);background:#fff}.avatar{color:#fff;-webkit-user-select:none;user-select:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:600;display:flex;position:relative}.avatar-online-dot{border:2px solid var(--bg-panel);background:#4caf50;border-radius:50%;width:28%;min-width:9px;height:28%;min-height:9px;position:absolute;bottom:0;right:0}.avatar-1{background:var(--avatar-1)}.avatar-2{background:var(--avatar-2)}.avatar-3{background:var(--avatar-3)}.avatar-group{background:var(--avatar-group)}.chat-area{background:var(--bg-chat);flex-direction:column;flex:1;min-width:0;display:flex;position:relative}.chat-empty{color:var(--text-secondary);text-align:center;flex:1;justify-content:center;align-items:center;padding:24px;display:flex}.chat-empty h2{color:var(--text-primary);font-size:18px;font-weight:600}.chat-header{background:var(--bg-panel);border-bottom:1px solid var(--border-subtle);z-index:5;height:56px;padding:0 16px;padding-top:env(safe-area-inset-top);height:calc(56px + env(safe-area-inset-top));flex-shrink:0;align-items:center;gap:12px;display:flex}.chat-header-info{flex:1;min-width:0}.chat-header-name{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:15px;font-weight:600;overflow:hidden}.chat-header-status{color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;font-size:13px;line-height:1.25;overflow:hidden}.back-btn{display:none}.messages-container{flex:1;padding:16px 0;overflow-y:auto}.messages-inner{flex-direction:column;gap:2px;max-width:728px;margin:0 auto;padding:0 16px;display:flex}.messages-empty{height:100%;color:var(--text-secondary);justify-content:center;align-items:center;display:flex}.date-divider{justify-content:center;margin:12px 0;display:flex}.date-divider span{color:#fff;-webkit-backdrop-filter:blur(8px);background:#0000002e;border-radius:12px;padding:4px 10px;font-size:12px;font-weight:500}.unread-divider{justify-content:center;margin:16px 0 8px;display:flex}.unread-divider span{color:var(--tg-blue);letter-spacing:.2px;background:#3390ec2e;border-radius:12px;padding:4px 14px;font-size:12px;font-weight:600}[data-theme=dark] .date-divider span{background:#ffffff1f}.message-group{gap:8px;max-width:100%;margin-top:10px;animation:.22s cubic-bezier(.22,1,.36,1) bubbleIn;display:flex}.message-group.outgoing{flex-direction:row-reverse}@keyframes bubbleIn{0%{opacity:0;transform:translateY(6px)scale(.97)}to{opacity:1;transform:none}}.message-stack{flex-direction:column;gap:2px;min-width:0;max-width:calc(100% - 50px);display:flex}.message-group.outgoing .message-stack{align-items:flex-end}.sender-name{margin-bottom:2px;padding:0 12px;font-size:13px;font-weight:600}.sender-name-1{color:#ff516a}.sender-name-2{color:#1cb04a}.sender-name-3{color:#665fff}[data-theme=dark] .sender-name-1{color:#ff7a8b}[data-theme=dark] 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.bubble{border-bottom-left-radius:var(--radius-bubble);border-bottom-right-radius:var(--radius-bubble-tail)}.message-meta{color:var(--text-tertiary);float:right;align-items:center;gap:3px;margin-top:5px;margin-left:6px;font-size:11px;display:inline-flex;position:relative;bottom:-3px}.message-edited{opacity:.85;font-style:italic}.message-history-btn{color:inherit;opacity:.7;border-radius:4px;justify-content:center;align-items:center;padding:2px;transition:opacity .12s,background .12s;display:inline-flex}.message-history-btn:hover{opacity:1;background:#00000014}.message-deleted .bubble.bubble-trashed{background:var(--bg-panel-hover);opacity:.6;border:1px dashed var(--field-border);box-shadow:none}.message-deleted 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env(safe-area-inset-right));z-index:200;-webkit-backdrop-filter:blur(6px);color:#fff;background:#ffffff2e;border-radius:50%;justify-content:center;align-items:center;width:44px;height:44px;transition:background .15s,transform 50ms;display:flex;position:fixed}.theme-toggle:hover{background:#ffffff47}.theme-toggle:active{transform:scale(.95)}