*{box-sizing:border-box;margin:0;padding:0}:root{--bg-color: #1e1e1e;--bg-secondary: #242424;--bg-tertiary: #2a2a2a;--bg-code: rgba(42, 42, 42, .8);--border-color: #333;--text-color: #e0e0e0;--text-secondary: #aaaaaa;--accent-color: #007acc;--hover-color: #2a2a2a}[data-theme=light]{--bg-color: #ffffff;--bg-secondary: #ffffff;--bg-tertiary: #f0f0f0;--bg-code: rgba(42, 42, 42, .8);--border-color: #e0e0e0;--text-color: #333333;--text-secondary: #666666;--accent-color: #71b6fb;--hover-color: #f0f0f0}body,html{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-color);transition:all .3s ease;color:var(--text-color);display:flex;width:100%;height:100%}body .dragtip{display:none;position:fixed;top:0;left:0;background:rgba(0,0,0,.8);transition:all .3s ease;z-index:999;width:100vw;height:100vh;pointer-events:none}body.dragover .dragtip{display:block}body.dragover .dragtip h1{position:absolute;top:50%;left:50%;margin:0;transform:translate(-50%,-50%);font-size:32px}pre{margin:0;font-family:Helvetica Neue,Helvetica,PingFang SC,Hiragino Sans GB,Microsoft YaHei,微软雅黑,Arial,sans-serif}pre code.hljs{border-radius:10px}.left{flex:1;padding:0;display:flex;flex-direction:column;background-color:var(--bg-secondary);transition:all .3s ease;border-radius:8px 0 0 8px;margin:10px 0 10px 10px}.right{width:200px;color:var(--text-color);border-left:1px solid var(--border-color);background-color:var(--bg-secondary);margin:10px 10px 10px 0;padding:10px 0;border-radius:0 8px 8px 0;display:flex;flex-direction:column;transition:all .3s ease;position:relative}.right.collapsed{width:30px;margin-right:0}.right.collapsed .collapse-btn svg{transform:rotate(180deg)}.right.collapsed>*:not(.collapse-btn){display:none}.collapse-btn{position:absolute;left:-14px;top:50%;transform:translateY(-50%);width:28px;height:28px;background-color:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-color);transition:background-color .3s ease;z-index:1}.collapse-btn:hover{background-color:var(--hover-color);transition:all .3s ease;color:var(--accent-color)}.collapse-btn svg{transition:transform .3s ease}.right ul{flex:1;padding:0;margin:0 10px 15px;overflow-y:auto}.right ul li{font-size:14px;user-select:none;cursor:default;line-height:24px;padding:8px 12px;margin:4px 0;border-radius:8px;background-color:var(--bg-tertiary);transition:all .3s ease;transition:all .3s;display:flex;align-items:center;gap:8px;color:var(--text-color)}.right ul li span{transition:all .3s}.right ul li:hover{background-color:var(--hover-color);transition:all .3s ease;color:var(--accent-color)}.right ul li:hover .device-icon{transition:all .3s ease;color:var(--accent-color)}.chat-wrapper{flex:1;font-size:18px;line-height:24px;padding:0 0 20px;display:flex;flex-direction:column;overflow:auto;scroll-behavior:smooth}.chat-item{display:block;padding:8px 15px;margin:5px 0;transition:background-color .3s}.chat-item:hover{background-color:transparent;transition:all .3s ease}.chat-item .chat-item_user{display:flex;align-items:center;gap:2px;margin-bottom:6px;color:#64b5f6;font-weight:500;font-size:14px;user-select:none}.chat-item .chat-item_user .device-icon{display:flex;align-items:center;color:var(--text-color)}.chat-item.self{text-align:right}.chat-item.self .chat-item_user{justify-content:flex-end}.chat-item.self .chat-item_content{background-color:var(--accent-color);transition:all .3s ease;text-align:left}.chat-item.self .chat-item_content pre{color:#fff}.chat-item .chat-item_content{display:inline-block;max-width:80%;padding:12px 16px;background-color:var(--bg-tertiary);transition:all .3s ease;border-radius:12px;position:relative}.chat-item .chat-item_content .code-language{font-size:12px;line-height:14px;color:#d7fffe;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;position:absolute;left:6px;bottom:-20px;display:inline-block;background-color:#4a4a4a;padding:2px 8px;border-radius:4px;font-weight:500;letter-spacing:.5px;border:none;box-shadow:0 2px 4px rgba(0,0,0,.1);z-index:1}.chat-item.self .chat-item_content .code-language{left:auto;right:6px}.chat-item .chat-item_content pre code.hljs{border-radius:10px;padding:1em}.chat-item .chat-item_content .code-language .language-name{font-weight:600;text-transform:lowercase}.language-name[data-lang=javascript]{color:#e7c905}.language-name[data-lang=python]{color:#4ca4ed}.language-name[data-lang=html]{color:#e44d26}.language-name[data-lang=css]{color:#47acea}.language-name[data-lang=java]{color:#f89820}.language-name[data-lang=php]{color:#8892bf}.language-name[data-lang=ruby]{color:#cc342d}.language-name[data-lang=swift]{color:#f05138}.language-name[data-lang=go]{color:#00add8}.language-name[data-lang=rust]{color:#dea584}.language-name{color:#4caf50}.chat-item .chat-item_content pre{white-space:pre-wrap;word-wrap:break-word;word-break:break-all;margin:0;font-size:15px;line-height:1.5;color:var(--text-color)}.chat-item .chat-item_content pre a{color:#64b5f6;text-decoration:none;transition:opacity .3s}.chat-item .chat-item_content pre a:hover{opacity:.8}.chat-item .chat-item_content .chat-image{max-width:100%;max-height:400px;border-radius:8px;cursor:pointer;transition:transform .3s}.chat-item .chat-item_content .chat-image:hover{transform:scale(1.02)}.chat-item a.file,.chat-item a.file:visited{display:inline-block;padding:12px 16px;margin-top:0;background-color:var(--bg-tertiary);transition:all .3s ease;border-radius:12px;color:var(--accent-color);text-decoration:none;transition:background-color .3s}.chat-item.self a.file{background-color:var(--accent-color);transition:all .3s ease;color:#fff}.chat-item a.file:hover{opacity:.9}.txt-msg{outline:none;color:var(--text-color);height:auto;min-height:130px;max-height:300px;background-color:var(--bg-tertiary);transition:all .3s ease;border:1px solid var(--border-color);border-radius:0 0 8px 8px;padding:12px;font-size:14px;line-height:1.5;margin:0;width:100%;box-sizing:border-box;overflow-y:auto;word-break:break-word;display:flex;flex-wrap:wrap;align-items:flex-start}.txt-msg[contenteditable=true]:empty:before{content:attr(placeholder);color:#666;pointer-events:none}.txt-msg img{max-width:200px;max-height:150px;border-radius:4px;vertical-align:middle;margin:4px;object-fit:contain}.message-input-wrapper{position:relative;margin:0 15px 15px}.paste-area{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;z-index:1;pointer-events:none}.paste-area:focus{pointer-events:auto}.modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);z-index:1000;opacity:0;transition:opacity .3s ease}.modal.show{display:flex;opacity:1;align-items:center;justify-content:center}.modal-content{background:var(--bg-color);border-radius:8px;min-width:500px;max-width:100%;max-height:90vh;padding:0 20px;overflow:auto;position:relative;box-shadow:0 2px 10px rgba(0,0,0,.1);transform:translateY(20px);transition:transform .3s ease}.modal.show .modal-content{transform:translateY(0)}.modal-content h3{margin:0;padding:15px 20px;border-bottom:1px solid var(--border-color);color:var(--text-color)}.modal-footer{padding:15px 5px;text-align:right;border-top:1px solid var(--border-color)}.modal-footer button{margin-left:10px;padding:6px 12px;border:none;border-radius:4px;background:var(--button-bg);color:var(--button-text);cursor:pointer;transition:background-color .2s}.modal-footer button:hover{background:var(--button-hover-bg)}.user-list{max-height:300px;overflow-y:auto}.user-select-item{padding:8px;cursor:pointer;color:var(--text-color);background-color:var(--bg-tertiary);transition:all .3s ease;border-radius:8px;margin:8px 0;transition:all .3s}.user-select-item:hover{background-color:var(--hover-color);transition:all .3s ease}.user-select-item label{display:flex;align-items:center;gap:6px;cursor:pointer;user-select:none;padding:4px}.user-select-item input[type=checkbox]{cursor:pointer;margin:0}.user-select-item .device-icon{display:flex;align-items:center;justify-content:center;color:var(--text-color);width:16px;height:16px}.user-select-item span:last-child{margin-left:2px}.user-select-item:hover .device-icon{color:var(--accent-color)}.progress-container{margin:15px 0}.progress-text{color:var(--text-color);margin-bottom:5px;font-size:14px}.progress-bar{width:100%;height:8px;background:var(--bg-tertiary);transition:all .3s ease;border-radius:4px;overflow:hidden}.progress-bar-inner{width:0%;height:100%;background:var(--accent-color);transition:all .3s ease;border-radius:4px;transition:width .3s ease}.toolbar{background-color:var(--bg-tertiary);transition:all .3s ease;margin:0 15px;padding:10px;border-radius:8px 8px 0 0;border:1px solid var(--border-color);border-bottom:none;display:flex;align-items:center;justify-content:space-between}.toolbar-left,.toolbar-right{display:flex;align-items:center}.toolbar-btn{background:none;transition:all .3s ease;border:none;padding:8px;cursor:pointer;color:var(--text-color);border-radius:4px;display:flex;align-items:center;justify-content:center;transition:all .3s}.toolbar-btn:hover{background-color:var(--hover-color);transition:all .3s ease;color:var(--accent-color)}.toolbar-btn svg{fill:var(--text-color)}.toolbar-btn:hover svg{fill:var(--accent-color)}.toolbar-btn svg path{fill:var(--text-color)}.toolbar-btn:hover svg path{fill:var(--accent-color)}.send-btn{color:var(--text-color);background-color:var(--bg-tertiary);transition:all .3s ease;border-radius:4px;padding:8px 12px;transition:all .3s}.send-btn svg{color:var(--text-color)}.send-btn svg path{fill:var(--text-color)}.send-btn:hover{background-color:var(--hover-color);transition:all .3s ease;color:var(--accent-color)}.send-btn:hover svg{color:var(--accent-color)}.send-btn:hover svg path{fill:var(--accent-color)}.dragtip{background:rgba(26,26,26,.95);transition:all .3s ease}.dragtip h1{color:#64b5f6;font-size:28px;text-align:center}.image-preview-modal{background:rgba(0,0,0,0);transition:all .3s ease;opacity:0;pointer-events:none}.image-preview-modal.show{background:rgba(0,0,0,.9);opacity:1;pointer-events:auto}.image-preview-content{position:relative;width:100%;height:100%;display:flex;align-items:center;justify-content:center}.image-preview-content img{max-width:90%;max-height:90vh;object-fit:contain;border-radius:8px;transform:scale(.5);opacity:0;transition:all .3s cubic-bezier(.4,0,.2,1)}.image-preview-modal.show .image-preview-content img{transform:scale(1);opacity:1}.image-preview-content .close-btn{position:absolute;top:20px;right:20px;background:none;transition:all .3s ease;border:none;color:#fff;font-size:32px;cursor:pointer;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .3s;opacity:0;transform:translateY(-20px)}.image-preview-modal.show .close-btn{opacity:1;transform:translateY(0);transition:all .3s cubic-bezier(.4,0,.2,1) .2s}.image-preview-content .close-btn:hover{background:rgba(255,255,255,.1);transition:all .3s ease}.toolbar-left .toolbar-btn{margin-right:8px}.toolbar-left .toolbar-btn:last-child{margin-right:0}.device-icon{display:flex;align-items:center;justify-content:center;color:var(--text-color);opacity:.8}.device-icon svg{display:block;color:var(--text-color)}.system-info{height:130px;padding:12px;border:1px solid var(--border-color);background-color:var(--bg-tertiary);transition:all .3s ease;border-radius:8px;margin:0 10px 10px;display:flex;flex-direction:column;justify-content:space-between}.info-item{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-color);padding:6px 8px;border-radius:4px;transition:background-color .3s}.system-info .info-item:hover{background-color:var(--hover-color);transition:all .3s ease;color:var(--accent-color)}.system-info .info-item svg{vertical-align:middle;opacity:.8;color:var(--text-color)}.os-icon svg,.browser-icon svg,.battery-icon svg{width:14px;height:14px;display:block;color:var(--text-color)}[data-theme=light] .browser-icon svg path{fill:var(--text-color)}[data-theme=light] .device-icon svg path:not([fill="#3DDC84"]):not([fill="#00A4EF"]){fill:var(--text-color)}[data-theme=light] .battery-icon svg{color:var(--text-color)}[data-theme=light] .theme-icon svg{color:var(--text-color)}[data-theme=light] .settings-icon svg{color:var(--text-color)}.setting-btn{padding:10px;border:1px solid var(--border-color);margin:0 10px 5px;display:flex;gap:10px;align-items:center;justify-content:flex-start;background-color:var(--bg-tertiary);transition:all .3s ease;border-radius:8px}.setting-btn .info-item{cursor:pointer;transition:all .3s ease;display:flex;align-items:center;gap:8px}.switch{position:relative;display:inline-block;width:44px;height:22px;margin:0}.switch input{opacity:0;width:0;height:0;margin:0}.slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:var(--border-color);transition:.3s cubic-bezier(.4,0,.2,1);border-radius:34px;box-shadow:inset 0 0 2px rgba(0,0,0,.2)}.slider:before{position:absolute;content:"";height:18px;width:18px;left:2px;bottom:2px;background-color:#fff;transition:.3s cubic-bezier(.4,0,.2,1);border-radius:50%;box-shadow:0 2px 4px rgba(0,0,0,.2)}.slider:after{position:absolute;content:"🌜";left:6px;top:3px;font-size:12px;transition:.3s cubic-bezier(.4,0,.2,1);opacity:0}input:checked+.slider:after{content:"🌞";left:24px;opacity:1}input:checked+.slider{background-color:var(--accent-color);transition:all .3s ease}input:checked+.slider:before{transform:translate(22px)}input:focus+.slider{box-shadow:0 0 1px var(--accent-color)}.slider:hover:before{box-shadow:0 2px 8px rgba(0,0,0,.3)}input:checked+.slider:hover:before{box-shadow:0 2px 8px rgba(33,150,243,.3)}.theme-icon,.settings-icon{display:flex;align-items:center;justify-content:center;color:var(--text-color)}.theme-switch{--toggle-size: 8px;--container-width: 5.625em;--container-height: 2.2em;--container-radius: 6.25em;--container-light-bg: #3d7eae;--container-night-bg: #1d1f2c;--circle-container-diameter: 3.375em;--sun-moon-diameter: 2.125em;--sun-bg: #ecca2f;--moon-bg: #c4c9d1;--spot-color: #959db1;--circle-container-offset: calc((var(--circle-container-diameter) - var(--container-height)) / 2 * -1);--stars-color: #fff;--clouds-color: #f3fdff;--back-clouds-color: #aacadf;--transition: .3s cubic-bezier(0, -.02, .4, 1.25);--circle-transition: .3s cubic-bezier(0, -.02, .35, 1.17)}.theme-switch,.theme-switch *,.theme-switch *:before,.theme-switch *:after{box-sizing:border-box;margin:0;padding:0;font-size:var(--toggle-size)}.theme-switch__container{width:var(--container-width);height:var(--container-height);background-color:var(--container-light-bg);border-radius:var(--container-radius);overflow:hidden;cursor:pointer;box-shadow:0 -.062em .062em rgba(0,0,0,.25),0 .062em .125em rgba(255,255,255,.94);transition:var(--transition);position:relative}.theme-switch__container:before{content:"";position:absolute;z-index:1;top:0;right:0;bottom:0;left:0;box-shadow:0 .05em .187em rgba(0,0,0,.25) inset,0 .05em .187em rgba(0,0,0,.25) inset;border-radius:var(--container-radius)}.theme-switch__checkbox{display:none}.theme-switch__circle-container{width:var(--circle-container-diameter);height:var(--circle-container-diameter);background-color:rgba(255,255,255,.1);position:absolute;left:var(--circle-container-offset);top:var(--circle-container-offset);border-radius:var(--container-radius);box-shadow:inset 0 0 0 3.375em rgba(255,255,255,.1),inset 0 0 0 3.375em rgba(255,255,255,.1),0 0 0 .625em rgba(255,255,255,.1),0 0 0 1.25em rgba(255,255,255,.1);display:flex;transition:var(--circle-transition);pointer-events:none}.theme-switch__sun-moon-container{pointer-events:auto;position:relative;z-index:2;width:var(--sun-moon-diameter);height:var(--sun-moon-diameter);margin:auto;border-radius:var(--container-radius);background-color:var(--sun-bg);box-shadow:.062em .062em .062em rgba(254,255,239,.61) inset,0 -.062em .062em #a1872a inset;filter:drop-shadow(.062em .125em .125em rgba(0,0,0,.25)) drop-shadow(0em .062em .125em rgba(0,0,0,.25));overflow:hidden;transition:var(--transition)}.theme-switch__moon{transform:translate(100%);width:100%;height:100%;background-color:var(--moon-bg);border-radius:inherit;box-shadow:.062em .062em .062em rgba(254,255,239,.61) inset,0 -.062em .062em #969696 inset;transition:var(--transition);position:relative}.theme-switch__spot{position:absolute;top:.75em;left:.312em;width:.75em;height:.75em;border-radius:var(--container-radius);background-color:var(--spot-color);transition:all .3s ease;box-shadow:0 .0312em .062em rgba(0,0,0,.25) inset}.theme-switch__spot:nth-of-type(2){width:.375em;height:.375em;top:.937em;left:1.375em}.theme-switch__spot:nth-last-of-type(3){width:.25em;height:.25em;top:.312em;left:.812em}.theme-switch__clouds{width:1.25em;height:1.25em;background-color:var(--clouds-color);border-radius:var(--container-radius);position:absolute;bottom:-.625em;left:.312em;box-shadow:.937em .312em var(--clouds-color),-.312em -.312em var(--back-clouds-color),1.437em .375em var(--clouds-color),.5em -.125em var(--back-clouds-color),2.187em 0 var(--clouds-color),1.25em -.062em var(--back-clouds-color),2.937em .312em var(--clouds-color),2em -.312em var(--back-clouds-color),3.625em -.062em var(--clouds-color),2.625em 0 var(--back-clouds-color),4.5em -.312em var(--clouds-color),3.375em -.437em var(--back-clouds-color),4.625em -1.75em 0 .437em var(--clouds-color),4em -.625em var(--back-clouds-color),4.125em -2.125em 0 .437em var(--back-clouds-color);transition:var(--transition)}.theme-switch__stars-container{position:absolute;color:var(--stars-color);top:-100%;left:.312em;width:2.75em;height:auto;transition:var(--transition)}.theme-switch__checkbox:checked+.theme-switch__container{background-color:var(--container-night-bg);transition:all .3s ease}.theme-switch__checkbox:checked+.theme-switch__container .theme-switch__circle-container{left:calc(100% - var(--circle-container-offset) - var(--circle-container-diameter))}.theme-switch__checkbox:checked+.theme-switch__container .theme-switch__circle-container:hover{left:calc(100% - var(--circle-container-offset) - var(--circle-container-diameter) - .187em)}.theme-switch__circle-container:hover{left:calc(var(--circle-container-offset) + .187em)}.theme-switch__checkbox:checked+.theme-switch__container .theme-switch__moon{transform:translate(0)}.theme-switch__checkbox:checked+.theme-switch__container .theme-switch__clouds{bottom:-4.062em}.theme-switch__checkbox:checked+.theme-switch__container .theme-switch__stars-container{top:50%;transform:translateY(-50%)}[data-theme=light] .chat-item .chat-item_content{background-color:var(--bg-tertiary);transition:all .3s ease}[data-theme=light] .chat-item.self .chat-item_content{background-color:var(--accent-color);transition:all .3s ease}[data-theme=light] .chat-item.self .chat-item_content pre{color:#fff}.chat-item.system-message{text-align:center;padding:4px 15px}.chat-item.system-message .chat-item_content{display:inline-block;padding:6px 12px;background-color:var(--bg-tertiary);transition:all .3s ease;border-radius:12px;opacity:.8}.chat-item.system-message .chat-item_content pre{font-size:13px;color:var(--text-secondary);display:flex;align-items:center;gap:4px}.chat-item.system-message .system-icon{display:inline-flex;vertical-align:middle}.chat-item.system-message .join-icon{color:#4caf50}.chat-item.system-message .leave-icon{color:#ff5722}.code-input-container{margin:15px 0}#languageSelect{width:100%;margin-bottom:10px;border:1px solid var(--border-color);border-radius:4px;background:var(--bg-tertiary);color:var(--text-color);font-size:14px}#codeInput{width:100%;height:200px;padding:10px;border:1px solid var(--border-color);border-radius:4px;background:var(--bg-tertiary);color:var(--text-color);font-family:Consolas,Monaco,Andale Mono,Ubuntu Mono,monospace;font-size:14px;line-height:1.5;resize:vertical;tab-size:4}#codeInput:focus{outline:none;border-color:var(--accent-color)}[data-theme=dark] #languageSelect,[data-theme=dark] #codeInput{border-color:var(--border-color);background:var(--bg-tertiary)}[data-theme=dark] #languageSelect:focus,[data-theme=dark] #codeInput:focus{border-color:var(--accent-color)}.modal-footer button:disabled{background:var(--border-color);border-color:var(--border-color);cursor:not-allowed;opacity:.7}.login-form{padding:20px}.form-group{margin-bottom:15px}.form-group label{display:block;margin-bottom:5px;color:var(--text-color)}.form-group input{width:100%;padding:8px;border:1px solid var(--border-color);border-radius:4px;background:var(--bg-color);color:var(--text-color)}.form-group input:focus{outline:none;border-color:var(--primary-color)}.login-badge{display:inline-block;margin-left:5px;color:#4caf50;font-weight:700}.form-switch{margin-top:15px;display:flex;align-items:center}.form-switch label{display:flex;align-items:center;gap:8px;cursor:pointer;user-select:none;color:var(--text-color)}.form-switch input[type=checkbox]{width:16px;height:16px;cursor:pointer}#loginButton,#registerButton{background-color:var(--accent-color);color:#fff;border:none;padding:8px 16px;border-radius:4px;cursor:pointer;transition:all .3s}#loginButton:hover,#registerButton:hover{opacity:.9}.form-group input{transition:all .3s}.form-group input:focus{border-color:var(--accent-color);box-shadow:0 0 0 2px rgba(0,122,204,.1)}