*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #0a0a0a;--bg-secondary: #111111;--bg-tertiary: #1a1a1a;--bg-hover: #222222;--bg-active: #2a2a2a;--text-primary: #e0e0e0;--text-secondary: #888888;--text-muted: #555555;--border-color: #2a2a2a;--border-light: #333333;--accent: #7a7a7a;--accent-hover: #999999;--error: #cc4444;--success: #44aa44;--font-mono: "JetBrains Mono", "Cascadia Code", "Fira Code", "SF Mono", "Consolas", monospace;--radius: 2px;--overlay-bg: rgba(10, 10, 10, .85)}[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f5f5f5;--bg-tertiary: #eaeaea;--bg-hover: #e0e0e0;--bg-active: #d5d5d5;--text-primary: #1a1a1a;--text-secondary: #555555;--text-muted: #999999;--border-color: #d5d5d5;--border-light: #c0c0c0;--accent: #555555;--accent-hover: #333333;--error: #cc3333;--success: #2d8a2d;--overlay-bg: rgba(255, 255, 255, .85)}html,body,#app{height:100%;width:100%;overflow:hidden}body{font-family:var(--font-mono);font-size:13px;line-height:1.5;color:var(--text-primary);background:var(--bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}input,textarea,select,button{font-family:inherit;font-size:inherit;color:inherit;background:inherit;border:none;outline:none}button{cursor:pointer;-webkit-user-select:none;user-select:none}a{color:var(--text-primary);text-decoration:none}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:0}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}::selection{background:var(--bg-active);color:var(--text-primary)}.app{display:flex;flex-direction:column;height:100%;width:100%;overflow:hidden}.header{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-bottom:1px solid var(--border-color);background:var(--bg-secondary);flex-shrink:0}.header-left{display:flex;align-items:center;gap:8px;min-width:0}.logo{font-weight:700;font-size:14px;letter-spacing:1px;color:var(--text-primary);flex-shrink:0}.logo:hover{color:var(--accent-hover)}.sep{color:var(--text-muted);flex-shrink:0}.room-slug{color:var(--text-secondary);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.copy-url-btn{background:none;border:none;color:var(--text-muted);font-size:12px;cursor:pointer;padding:0 2px;flex-shrink:0}.copy-url-btn:hover{color:var(--text-primary)}.header-right{display:flex;align-items:center;gap:12px;flex-shrink:0}.peer-count-wrapper{position:relative}.peer-count{font-size:11px;color:var(--text-secondary);padding:2px 8px;border:1px solid var(--border-color);border-radius:var(--radius);cursor:pointer;background:none}.peer-count:hover{border-color:var(--border-light);color:var(--text-primary)}.peer-list-dropdown{position:absolute;top:100%;right:0;margin-top:6px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius);min-width:140px;z-index:50}.peer-list-item{padding:4px 10px;font-size:11px;color:var(--text-secondary);white-space:nowrap}.peer-list-self{color:var(--text-primary)}.peer-name{font-size:11px;color:var(--text-muted);font-style:italic}.connection-status{font-size:10px;color:var(--text-muted);text-transform:lowercase}.connection-status.connected{color:var(--success)}.connection-status.error{color:var(--error)}.chat-wrapper{display:flex;flex-shrink:0;position:relative}.chat-wrapper.collapsed{width:0}.chat-wrapper.collapsed .chat{display:none}.chat-tab{position:absolute;left:-20px;top:50%;transform:translateY(-50%);width:20px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);border:1px solid var(--border-color);border-right:none;border-radius:var(--radius) 0 0 var(--radius);color:var(--text-muted);font-size:14px;cursor:pointer;padding:0;z-index:5}.chat-tab:hover{color:var(--text-primary);background:var(--bg-tertiary)}.main{flex:1;display:flex;flex-direction:column;overflow:hidden;min-height:0}.content-area{flex:1;display:flex;min-height:0;overflow:hidden}.resize-handle{flex-shrink:0;background:var(--border-color);transition:background .15s ease;touch-action:none}.resize-handle:hover,.resize-handle:active{background:var(--text-muted)}.resize-handle-vertical{height:4px;cursor:row-resize}.resize-handle-horizontal{width:4px;cursor:col-resize}.drop-zone-wrapper{flex-shrink:0;display:flex;overflow:hidden}.drop-zone{position:relative;display:flex;align-items:center;justify-content:center;padding:32px 16px;flex:1;width:100%}.drop-zone-content{display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center}.drop-icon{font-size:24px;color:var(--text-muted);line-height:1}.drop-text{font-size:13px;color:var(--text-secondary)}.browse-btn{color:var(--text-primary);text-decoration:underline;text-underline-offset:2px;font-size:13px;background:none;border:none;padding:0}.browse-btn:hover{color:var(--accent-hover)}.drop-hint{font-size:10px;color:var(--text-muted);max-width:320px}.drop-overlay{display:none;position:absolute;top:0;right:0;bottom:0;left:0;background:var(--overlay-bg);border:2px dashed var(--text-muted);align-items:center;justify-content:center;font-size:14px;color:var(--text-primary);letter-spacing:1px;z-index:10}.drop-zone.drag-over .drop-overlay{display:flex}.file-panel{flex:1;display:flex;flex-direction:column;min-width:0;border-right:1px solid var(--border-color)}.file-search{padding:8px 12px;border-bottom:1px solid var(--border-color);flex-shrink:0}.file-search-input{width:100%;padding:4px 8px;font-size:11px;background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color);border-radius:var(--radius)}.file-search-input::placeholder{color:var(--text-muted)}.file-search-input:focus{border-color:var(--border-light)}.file-list{flex:1;overflow-y:auto;padding:0}.folder-header{display:flex;align-items:center;gap:8px;padding:8px 16px;border-bottom:1px solid var(--border-color);-webkit-user-select:none;user-select:none}.folder-header:hover{background:var(--bg-secondary)}.folder-header-info{display:flex;align-items:center;gap:8px;flex:1;min-width:0;cursor:pointer}.folder-arrow{font-size:10px;color:var(--text-muted);width:12px;flex-shrink:0}.folder-name{font-size:12px;color:var(--text-primary);font-weight:500}.folder-meta{font-size:10px;color:var(--text-muted);flex:1}.folder-actions{display:flex;gap:4px;flex-shrink:0;margin-left:auto}.file-item{display:flex;align-items:center;gap:10px;padding:10px 16px;border-bottom:1px solid var(--border-color)}.file-item:hover{background:var(--bg-secondary)}.file-checkbox{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:20px;height:20px;cursor:pointer}.file-checkbox input{display:none}.file-checkbox-mark{width:12px;height:12px;border:1px solid var(--border-light);border-radius:1px;background:transparent;transition:background .1s ease,border-color .1s ease}.file-checkbox input:checked+.file-checkbox-mark{background:var(--text-secondary);border-color:var(--text-secondary)}.file-checkbox:hover .file-checkbox-mark{border-color:var(--text-secondary)}.file-checkbox-mark.indeterminate{background:var(--text-muted);border-color:var(--text-muted)}.file-info{flex:1;min-width:0}.file-name{font-size:12px;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-meta{font-size:10px;color:var(--text-muted);display:flex;gap:4px}.file-meta span+span:before{content:"·";margin-right:4px}.file-actions{display:flex;gap:4px;flex-shrink:0}.file-action-btn{padding:4px 10px;font-size:11px;border:1px solid var(--border-color);border-radius:var(--radius);background:var(--bg-tertiary);color:var(--text-secondary)}.file-action-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.file-action-btn:disabled{opacity:.3;cursor:not-allowed}.file-download-status{font-size:10px;color:var(--text-muted);white-space:nowrap}.file-progress{width:100%;height:2px;background:var(--border-color);margin-top:4px;border-radius:1px;overflow:hidden}.file-progress-bar{height:100%;background:var(--text-secondary);transition:width .15s ease}.file-progress-bar.complete{background:var(--success)}.file-item-stored{border-left:2px solid var(--text-muted)}.file-stored-badge{font-size:9px;color:var(--success);padding:2px 6px;border:1px solid var(--success);border-radius:var(--radius)}.store-btn{color:var(--text-muted)}.store-btn:hover{color:var(--success);border-color:var(--success)}.delete-btn{color:var(--text-muted)}.delete-btn:hover{color:var(--error);border-color:var(--error)}.store-dropdown{position:relative}.store-dropdown-menu{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius);min-width:100px;z-index:100}.store-dropdown-item{padding:4px 10px;font-size:11px;color:var(--text-secondary);cursor:pointer;white-space:nowrap}.store-dropdown-item:hover{background:var(--bg-hover);color:var(--text-primary)}.file-list-empty{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-muted);font-size:11px}.bulk-actions{display:none;padding:6px 12px;border-bottom:1px solid var(--border-color);background:var(--bg-secondary);align-items:center;justify-content:space-between;flex-shrink:0}.bulk-actions.visible{display:flex}.bulk-count{font-size:11px;color:var(--text-secondary)}.bulk-buttons{display:flex;gap:4px}.footer{display:flex;align-items:center;justify-content:space-between;padding:6px 16px;border-top:1px solid var(--border-color);background:var(--bg-secondary);flex-shrink:0}.footer-text{font-size:10px;color:var(--text-muted)}.theme-toggle{background:none;border:none;font-size:14px;color:var(--text-muted);cursor:pointer;padding:2px 4px;line-height:1}.theme-toggle:hover{color:var(--text-primary)}.chat{width:280px;flex-shrink:0;display:flex;flex-direction:column;overflow:hidden}.chat-messages{flex:1;overflow-y:auto;padding:8px 12px}.chat-msg{margin-bottom:6px;font-size:11px;line-height:1.5;word-break:break-word}.chat-msg-name{color:var(--text-secondary);font-weight:500;margin-right:2px}.chat-msg-text{color:var(--text-primary)}.chat-msg-time{font-size:9px;color:var(--text-muted);margin-right:4px;-webkit-user-select:none;user-select:none}.chat-msg-system{color:var(--text-muted);font-size:10px;font-style:italic}.chat-msg-file-ref{color:var(--accent-hover);text-decoration:underline;text-underline-offset:2px;cursor:pointer}.chat-msg-file-size{font-size:9px;color:var(--text-muted);margin-left:3px;font-style:normal;text-decoration:none;display:inline-block}.chat-msg-user-ref{color:var(--accent-hover);font-weight:500}.chat-msg-mentioned{background:var(--bg-tertiary);border-left:2px solid var(--accent-hover);padding-left:6px;margin-left:-8px}.chat-mention-type{color:var(--text-muted);margin-right:6px;font-size:10px}.chat-input-wrapper{position:relative;border-top:1px solid var(--border-color)}.chat-input{width:100%;padding:8px 12px;font-size:12px;background:var(--bg-secondary);color:var(--text-primary);border:none;outline:none}.chat-input-row{display:flex;align-items:center}.chat-input-row .chat-input{flex:1}.chat-send-btn{padding:8px 10px;background:var(--bg-secondary);color:var(--text-muted);border:none;border-left:1px solid var(--border-color);cursor:pointer;font-size:12px;line-height:1}.chat-send-btn:hover{color:var(--text-primary)}.chat-input::placeholder{color:var(--text-muted)}.chat-mentions{display:none;position:absolute;bottom:100%;left:0;right:0;background:var(--bg-tertiary);border:1px solid var(--border-color);border-bottom:none;max-height:120px;overflow-y:auto}.chat-mentions.visible{display:block}.chat-mention-item{padding:4px 12px;font-size:11px;color:var(--text-secondary);cursor:pointer}.chat-mention-item:hover,.chat-mention-item.active{background:var(--bg-hover);color:var(--text-primary)}.chat-empty{color:var(--text-muted);font-size:10px;text-align:center;padding:16px}@media(max-width:768px){.header{padding:10px 12px}.header-left{gap:6px}.logo{font-size:13px}.room-slug{font-size:12px;max-width:120px}.header-right{gap:8px}.peer-name{font-size:10px}.drop-zone{padding:24px 12px}.content-area{flex-direction:column}.file-panel{border-right:none;border-bottom:1px solid var(--border-color);max-height:40%}.chat{width:100%}.file-item{padding:10px 12px;gap:8px}.file-action-btn{padding:6px 12px;font-size:12px;min-height:36px}.footer{padding:6px 12px}}