:root{--bg:#f3f3f5;--card:#fff;--text:#15151a;--text-muted:#9aa0a6;--text-subtle:#6c7178;--accent:#7c6cf2;--accent-soft:#ebe8ff;--danger:#e25555;--danger-soft:#ffe5e5;--neutral-soft:#f1f1f4;--pill:#e5e5ea;--border:#1414280f;--shadow:0 1px 2px #1414280a;--shadow-hover:0 4px 14px #1414280f;--shadow-float:0 10px 28px #1414281f;--radius-sm:12px;--radius-md:16px;--radius-lg:20px;--radius-xl:24px;--radius-pill:999px;--sidebar-w:252px;--list-pane-w:360px;--bottom-nav-h:76px}*,:before,:after{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}html,body,#root{width:100%;height:100%}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,SF Pro Text,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;overflow:hidden}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer;background:0 0;border:none}a{color:inherit;text-decoration:none}.app{width:100vw;height:100vh;display:flex}.sidebar{width:var(--sidebar-w);background:var(--card);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;height:100vh;padding:22px 14px 18px;display:flex}.sidebar-brand{align-items:center;gap:11px;padding:4px 10px 22px;display:flex}.sidebar-brand-mark{color:#fff;letter-spacing:-.5px;background:linear-gradient(135deg,#8b7df5 0%,#5848c0 100%);border-radius:11px;justify-content:center;align-items:center;width:34px;height:34px;font-size:16px;font-weight:800;display:flex}.sidebar-brand-name{letter-spacing:-.4px;color:var(--text);font-size:19px;font-weight:700}.sidebar-nav{flex-direction:column;flex:1;gap:4px;display:flex}.sidebar-btn{color:var(--text-subtle);letter-spacing:-.2px;text-align:left;cursor:pointer;background:0 0;border-radius:14px;align-items:center;gap:12px;width:100%;padding:11px 12px;font-size:15px;font-weight:600;transition:background .15s,color 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.15s;display:flex}.sidebar-profile:hover{background:var(--neutral-soft)}.sidebar-profile-meta{flex-direction:column;min-width:0;display:flex}.sidebar-profile-name{letter-spacing:-.2px;color:var(--text);font-size:14px;font-weight:700}.sidebar-profile-email{color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.main{flex-direction:column;flex:1;min-width:0;height:100vh;display:flex;overflow:hidden}.main-split{flex-direction:row}.chat-list-pane{width:var(--list-pane-w);border-right:1px solid var(--border);background:var(--bg);flex-direction:column;flex-shrink:0;height:100vh;display:flex;overflow:hidden}.chat-list-pane-inner{flex:1;padding:4px 16px 24px;overflow-y:auto}.chat-view-pane{background:var(--bg);flex-direction:column;flex:1;min-width:0;height:100vh;display:flex;position:relative;overflow:hidden}.main-content{flex:1;overflow-y:auto}.main-content-inner{max-width:920px;margin:0 auto;padding:28px 32px 40px}.page-header{justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:18px;display:flex}.page-header-titles{flex-direction:column;min-width:0;display:flex}.page-title{letter-spacing:-.6px;color:var(--text);font-size:28px;font-weight:800}.page-subtitle{color:var(--text-muted);margin-top:4px;font-size:14px}.section-header{color:var(--text-muted);letter-spacing:-.1px;margin:22px 6px 10px;font-size:13px;font-weight:600}.pane-header{flex-shrink:0;justify-content:space-between;align-items:center;gap:12px;padding:18px 16px 12px;display:flex}.pane-title{letter-spacing:-.5px;color:var(--text);font-size:22px;font-weight:800}.pane-action{background:var(--accent-soft);width:36px;height:36px;color:var(--accent);border-radius:50%;justify-content:center;align-items:center;transition:background .15s;display:flex}.pane-action:hover{background:#ddd5ff}.pane-search{flex-shrink:0;padding:0 16px 12px}.empty-state{text-align:center;color:var(--text-muted);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:16px;padding:40px;display:flex}.empty-state-icon{border-radius:var(--radius-xl);background:var(--accent-soft);width:76px;height:76px;color:var(--accent);justify-content:center;align-items:center;display:flex}.empty-state-title{color:var(--text);letter-spacing:-.3px;font-size:20px;font-weight:700}.empty-state-text{color:var(--text-muted);max-width:320px;font-size:14px;line-height:1.45}.search{background:var(--pill);border-radius:var(--radius-pill);align-items:center;gap:10px;height:44px;padding:0 16px;display:flex;position:relative}.search-icon{color:var(--text-muted);flex-shrink:0}.search-input{color:var(--text);letter-spacing:-.2px;background:0 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.15s;display:flex}.chat-item:hover{box-shadow:var(--shadow-hover)}.chat-item:active{transform:scale(.99)}.chat-item.active{background:var(--accent-soft)}.chat-body{flex:1;min-width:0}.chat-row{justify-content:space-between;align-items:center;gap:8px;display:flex}.chat-row+.chat-row{margin-top:4px}.chat-titles{flex:1;align-items:baseline;gap:6px;min-width:0;display:flex;overflow:hidden}.chat-name{color:var(--text);letter-spacing:-.3px;white-space:nowrap;text-overflow:ellipsis;flex-shrink:0;max-width:100%;font-size:16px;font-weight:700;overflow:hidden}.chat-handle{color:var(--text-muted);letter-spacing:-.1px;text-overflow:ellipsis;white-space:nowrap;min-width:0;font-size:13px;font-weight:500;overflow:hidden}.chat-meta{flex-shrink:0;align-items:center;gap:4px;display:flex}.chat-time{color:var(--text-muted);font-size:13px;font-weight:400}.chat-icon-pin{color:var(--accent);flex-shrink:0}.chat-icon-mute{color:var(--text-muted);flex-shrink:0}.chat-preview{color:var(--text-subtle);text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;font-size:14px;overflow:hidden}.chat-preview.typing{color:var(--accent);font-weight:500}.badge{background:var(--accent);color:#fff;border-radius:var(--radius-pill);flex-shrink:0;justify-content:center;align-items:center;min-width:20px;height:20px;padding:0 6px;font-size:12px;font-weight:700;display:inline-flex}.badge-muted{background:var(--text-muted)}.avatar{color:#fff;letter-spacing:-.5px;text-shadow:0 1px 2px #0000001f;border-radius:16px;flex-shrink:0;justify-content:center;align-items:center;font-weight:700;display:flex;position:relative;overflow:hidden}.avatar img{object-fit:cover;width:100%;height:100%;display:block}.avatar-sm{border-radius:12px;width:38px;height:38px;font-size:17px}.avatar-md{border-radius:16px;width:52px;height:52px;font-size:22px}.avatar-lg{border-radius:18px;width:56px;height:56px;font-size:24px}.avatar-xl{border-radius:22px;width:80px;height:80px;font-size:32px}.avatar-grad-0{background:linear-gradient(135deg,#6cc6f2 0%,#4b6fd4 100%)}.avatar-grad-1{background:radial-gradient(circle at 30% 30%,#d8d0ff 0%,#0000 55%),radial-gradient(circle at 75% 70%,#b0a0f5 0%,#0000 55%),linear-gradient(135deg,#c4b8f7 0%,#6f5fd4 100%)}.avatar-grad-2{background:linear-gradient(135deg,#f0a868 0%,#d46f4b 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#14142814}.settings-list{flex-direction:column;gap:10px;margin-top:14px;display:flex}.settings-row{background:var(--card);border-radius:var(--radius-lg);box-shadow:var(--shadow);cursor:pointer;align-items:center;gap:14px;padding:16px 18px;transition:transform .12s,box-shadow 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#1414280f}.profile-meta{flex-direction:column;min-width:0;display:flex}.profile-name{color:var(--text);letter-spacing:-.3px;font-size:20px;font-weight:700}.profile-email{color:var(--text-muted);margin-top:2px;font-size:14px}.btn-primary{background:var(--accent);color:#fff;border-radius:var(--radius-md);letter-spacing:-.2px;justify-content:center;align-items:center;gap:8px;min-height:46px;padding:12px 22px;font-size:15px;font-weight:700;transition:filter .15s,transform .12s;display:inline-flex;box-shadow:0 2px 8px #7c6cf240}.btn-primary:hover{filter:brightness(1.05)}.btn-primary:active{transform:scale(.99)}.btn-primary:disabled{opacity:.5;cursor:default;filter:none}.btn-secondary{background:var(--neutral-soft);color:var(--text);border-radius:var(--radius-md);letter-spacing:-.2px;justify-content:center;align-items:center;gap:8px;min-height:46px;padding:12px 22px;font-size:15px;font-weight:600;transition:background 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0 3px #7c6cf226}.text-input::placeholder{color:var(--text-muted)}.text-input:disabled{background:var(--neutral-soft);color:var(--text-subtle)}.field-label{color:var(--text-muted);letter-spacing:-.1px;margin-bottom:6px;font-size:13px;font-weight:600;display:block}.switch{flex-shrink:0;width:48px;height:28px;display:inline-block;position:relative}.switch input{opacity:0;width:0;height:0}.switch-slider{cursor:pointer;border-radius:var(--radius-pill);background:#d8d8de;transition:background .2s;position:absolute;inset:0}.switch-slider:before{content:"";background:#fff;border-radius:50%;width:22px;height:22px;transition:transform .2s;position:absolute;bottom:3px;left:3px;box-shadow:0 1px 3px #00000026}.switch input:checked+.switch-slider{background:var(--accent)}.switch input:checked+.switch-slider:before{transform:translate(20px)}.spinner{border:2px solid #14142814;border-top-color:var(--accent);border-radius:50%;width:24px;height:24px;animation:.8s linear infinite spin}.spinner-light{border-color:#fff #ffffff4d #ffffff4d}@keyframes spin{to{transform:rotate(360deg)}}.app-loading{background:var(--bg);justify-content:center;align-items:center;height:100vh;display:flex}.chat-topbar{background:var(--bg);flex-shrink:0;align-items:center;gap:12px;padding:16px 22px;display:flex;position:relative}.chat-topbar:after{content:"";background:var(--border);height:1px;position:absolute;bottom:0;left:22px;right:22px}.topbar-titles{flex-direction:column;flex:1;min-width:0;line-height:1.2;display:flex}.topbar-name{color:var(--text);letter-spacing:-.3px;text-overflow:ellipsis;white-space:nowrap;font-size:17px;font-weight:700;overflow:hidden}.topbar-handle{color:var(--text-muted);letter-spacing:-.1px;font-size:12px;font-weight:500}.topbar-handle.typing{color:var(--accent)}.messages{flex-direction:column;flex:1;gap:6px;padding:18px 22px 28px;display:flex;overflow-y:auto}.day-pill{color:var(--text-subtle);border-radius:var(--radius-pill);letter-spacing:-.1px;background:#1414280f;align-self:center;margin:6px 0 10px;padding:5px 12px;font-size:12px;font-weight:600}.msg{border-radius:14px;margin-top:4px;padding:0 2px;transition:background .15s;display:flex}.msg.selectable{cursor:pointer}.msg.selected{background:#7c6cf21f}.msg-in{justify-content:flex-start}.msg-out{justify-content:flex-end}.msg-in+.msg-in,.msg-out+.msg-out{margin-top:2px}.bubble{max-width:min(560px,78%);box-shadow:var(--shadow);padding:10px 14px 8px;position:relative}.bubble-in{background:var(--card);color:var(--text);border-radius:10px 18px 18px}.bubble-out{color:#fff;background:linear-gradient(135deg,#8b7df5 0%,#6f5fd4 70%,#5848c0 100%);border-radius:18px 10px 18px 18px;box-shadow:0 4px 14px #7c6cf240}.bubble-deleted{color:var(--text-muted);font-size:14px;font-style:italic}.bubble-time{letter-spacing:-.1px;text-align:right;margin-top:4px;font-size:11px;display:block}.bubble-in .bubble-time{color:var(--text-muted)}.bubble-out .bubble-time{color:#ffffffbf}.typing-bubble{padding:12px 14px}.typing-dots{align-items:center;gap:4px;display:inline-flex}.typing-dots span{background:var(--text-muted);border-radius:50%;width:6px;height:6px;animation:1.2s ease-in-out infinite typing-bob}.typing-dots span:nth-child(2){animation-delay:.15s}.typing-dots span:nth-child(3){animation-delay:.3s}@keyframes typing-bob{0%,60%,to{opacity:.35;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}.attachment{color:inherit;background:#7c6cf21a;border-radius:12px;align-items:center;gap:10px;margin-bottom:8px;padding:8px 10px;text-decoration:none;display:flex}.bubble-out .attachment{background:#ffffff29}.attachment-icon{background:var(--accent);color:#fff;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;display:flex}.bubble-out .attachment-icon{background:#fff3}.attachment-info{flex-direction:column;min-width:0;display:flex}.attachment-name{color:inherit;text-overflow:ellipsis;white-space:nowrap;font-size:13.5px;font-weight:600;overflow:hidden}.attachment-meta{opacity:.75;margin-top:1px;font-size:11.5px}.attachment-image{cursor:pointer;border-radius:12px;max-width:280px;max-height:280px;display:block}.composer{background:var(--card);box-shadow:var(--shadow-float);border-radius:22px;flex-shrink:0;align-items:flex-end;gap:8px;margin:0 22px 22px;padding:8px;display:flex;position:relative}.composer-btn{border-radius:50%;flex-shrink:0;justify-content:center;align-self:flex-end;align-items:center;width:40px;height:40px;transition:filter .15s,background .15s;display:flex}.composer-btn.attach{background:var(--neutral-soft);color:var(--text)}.composer-btn.attach:hover{background:#e9e9ee}.composer-btn.send{background:var(--accent);color:#fff;box-shadow:0 2px 8px #7c6cf259}.composer-btn.send:hover{filter:brightness(1.05)}.composer-btn.send:disabled{box-shadow:none;cursor:default;background:#c6c1ec}.composer-input-wrap{flex:1;align-items:center;min-height:40px;padding:0 4px;display:flex}.composer-input{resize:none;letter-spacing:-.15px;width:100%;color:var(--text);background:0 0;border:none;outline:none;max-height:140px;padding:10px 4px;font-family:inherit;font-size:15px;line-height:1.4}.composer-input::placeholder{color:var(--text-muted)}.chat-start-area{flex-shrink:0;justify-content:center;padding:22px;display:flex}.command-palette{background:var(--card);box-shadow:var(--shadow-float);z-index:10;border-radius:16px;max-height:240px;position:absolute;bottom:calc(100% + 6px);left:0;right:0;overflow-y:auto}.command-palette-item{cursor:pointer;align-items:baseline;gap:10px;padding:10px 16px;transition:background .12s;display:flex}.command-palette-item:hover{background:var(--neutral-soft)}.command-palette-item:first-child{border-radius:16px 16px 0 0}.command-palette-item:last-child{border-radius:0 0 16px 16px}.command-palette-name{color:var(--accent);font-size:14px;font-weight:700}.command-palette-desc{color:var(--text-muted);font-size:13px}.context-menu{background:var(--card);z-index:100;min-width:200px;box-shadow:var(--shadow-float);border-radius:14px;margin-top:6px;padding:6px;position:absolute;top:100%;right:0}.context-menu-item{color:var(--text);cursor:pointer;border-radius:10px;align-items:center;gap:10px;padding:10px 12px;font-size:14px;transition:background .12s;display:flex}.context-menu-item:hover{background:var(--neutral-soft)}.context-menu-item.danger{color:var(--danger)}.sparkle{color:#f5b942}.md-content{letter-spacing:-.15px;word-wrap:break-word;font-size:15px;line-height:1.4}.md-content p+p{margin-top:6px}.md-content h1,.md-content h2,.md-content h3,.md-content h4{letter-spacing:-.3px;margin:8px 0 4px;font-weight:700}.md-content h1{font-size:20px}.md-content h2{font-size:18px}.md-content h3{font-size:17px}.md-content h4{font-size:16px}.md-content a{text-decoration:underline}.bubble-in .md-content a{color:var(--accent)}.bubble-out .md-content a{color:#fff}.md-content code{letter-spacing:0;background:#14142814;border-radius:5px;padding:1px 5px;font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace;font-size:13px}.bubble-out .md-content code{color:#fff;background:#ffffff2e}.md-content pre{background:#1414280f;border-radius:10px;margin:8px 0 2px;padding:10px 12px;overflow-x:auto}.bubble-out .md-content 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0}::-webkit-scrollbar-thumb{background:#14142826;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#14142840}.login-shell{background:var(--bg);justify-content:center;align-items:center;width:100vw;height:100vh;padding:24px;display:flex}.login-card{background:var(--card);border-radius:var(--radius-xl);text-align:center;flex-direction:column;align-items:center;gap:14px;width:100%;max-width:420px;padding:32px;display:flex;box-shadow:0 10px 40px #14142814}.login-brand{flex-direction:column;align-items:center;gap:14px;margin-bottom:6px;display:flex}.login-title{letter-spacing:-.5px;color:var(--text);margin-top:6px;font-size:26px;font-weight:800}.login-subtitle{color:var(--text-muted);max-width:320px;font-size:15px;line-height:1.5}.login-google-slot{justify-content:center;align-items:center;min-height:44px;margin-top:10px;display:flex}.login-google-slot.loading{opacity:.6;pointer-events:none}.login-status{color:var(--text-muted);font-size:13px;font-weight:600}.login-error{color:var(--danger);font-size:13px}.image-viewer{z-index:200;background:#000000f2;flex-direction:column;display:flex;position:fixed;inset:0}.image-viewer-controls{z-index:1;display:flex;position:absolute;top:18px;left:18px;right:18px}.image-viewer-controls .btn-icon{color:#fff;background:#ffffff1f}.image-viewer-controls .btn-icon:hover{background:#fff3}.image-viewer-img{object-fit:contain;max-width:92vw;max-height:92vh;margin:auto}.bottom-nav,.mobile-back{display:none}@media (width<=900px){.sidebar{display:none}.app{height:100vh;padding-bottom:var(--bottom-nav-h);flex-direction:column}.main{height:calc(100vh - var(--bottom-nav-h));overflow:hidden}.main-split{flex-direction:column}body.show-list .chat-view-pane,body.show-chat .chat-list-pane{display:none}.chat-list-pane,.chat-view-pane{border-right:none;width:100%;height:100%}.main-content-inner{padding:18px 18px 28px}.page-title{font-size:24px}.pane-header{padding:16px 18px 10px}.pane-search{padding:0 18px 10px}.chat-list-pane-inner{padding:0 18px 28px}.mobile-back{width:36px;height:36px;color:var(--text);background:0 0;border-radius:50%;justify-content:center;align-items:center;margin-right:2px;display:inline-flex}.mobile-back:hover{background:#1414280d}.bottom-nav{background:var(--card);width:calc(100% - 28px);max-width:480px;height:64px;box-shadow:var(--shadow-float);z-index:20;border-radius:28px;justify-content:space-around;align-items:center;gap:6px;padding:6px 10px;display:flex;position:fixed;bottom:14px;left:50%;transform:translate(-50%)}.nav-btn{color:var(--text-muted);background:0 0;border-radius:20px;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:3px;padding:6px;transition:background .15s,color .15s;display:flex}.nav-btn.active{color:var(--accent);background:var(--accent-soft)}.nav-label{letter-spacing:-.1px;font-size:11px;font-weight:600}.chat-topbar{padding:14px 16px}.chat-topbar:after{left:16px;right:16px}.messages{padding:14px 16px calc(var(--bottom-nav-h) + 90px)}.bubble{max-width:82%}.composer{left:50%;bottom:calc(var(--bottom-nav-h) + 14px);z-index:10;width:calc(100% - 24px);max-width:480px;margin:0;position:fixed;transform:translate(-50%)}.chat-start-area{padding-bottom:calc(var(--bottom-nav-h) + 30px)}}@media (width>=901px){body.show-list .chat-view-pane,body.show-chat .chat-list-pane{display:flex}}