*{box-sizing:border-box}:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.5;font-weight:400;color:#333;background-color:#fff;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;padding:0;min-width:320px;min-height:100vh}#root{width:100%;height:100vh}.navigation-bar{display:flex;gap:0;background-color:#f5f5f5;border-bottom:1px solid #ddd;padding:0;height:32px;font-size:13px}.menu-item{position:relative}.menu-button{background:none;border:none;padding:8px 16px;cursor:pointer;font-size:13px;height:32px;color:#333;transition:background-color .2s}.menu-button:hover{background-color:#e0e0e0}.dropdown-menu{position:absolute;top:100%;left:0;background-color:#fff;border:1px solid #ccc;box-shadow:0 2px 8px #00000026;min-width:160px;z-index:1000}.dropdown-menu button{display:block;width:100%;text-align:left;padding:8px 16px;border:none;background:none;cursor:pointer;font-size:13px;color:#333}.dropdown-menu button:hover:not(:disabled){background-color:#e8f4ff}.dropdown-menu button:disabled{color:#999;cursor:not-allowed}.menu-separator{height:1px;background-color:#ddd;margin:4px 0}.menu-item-with-submenu{position:relative}.menu-item-with-submenu>button{display:block;width:100%;text-align:left;padding:8px 16px;border:none;background:none;cursor:pointer;font-size:13px;color:#333}.menu-item-with-submenu>button:hover{background-color:#e8f4ff}.context-submenu{position:absolute;left:100%;top:0;background-color:#fff;border:1px solid #ccc;box-shadow:0 2px 8px #00000026;min-width:160px;z-index:1001}.context-submenu button{display:block;width:100%;text-align:left;padding:8px 16px;border:none;background:none;cursor:pointer;font-size:13px;color:#333;white-space:nowrap}.context-submenu button:hover{background-color:#e8f4ff}.context-menu{position:fixed;background:#fff;border:1px solid #ccc;border-radius:4px;box-shadow:0 2px 8px #00000026;min-width:150px;z-index:10000;padding:4px 0}.context-menu-item{padding:8px 16px;cursor:pointer;font-size:13px;-webkit-user-select:none;user-select:none;position:relative}.context-menu-item:hover{background-color:#f0f0f0}.context-menu-parent{display:flex;justify-content:space-between;align-items:center}.context-submenu{position:absolute;left:100%;top:0;background:#fff;border:1px solid #ccc;border-radius:4px;box-shadow:0 2px 8px #00000026;min-width:120px;padding:4px 0;margin-left:-1px}.task-list{background-color:#fff}.task-item{display:flex;align-items:center;padding:0 8px;cursor:move;border-bottom:1px solid #f0f0f0;height:36px;-webkit-user-select:none;user-select:none}.task-item.dragging{opacity:.4}.task-item:hover{background-color:#f5f5f5}.task-item.focused{background-color:#e8f4ff;border-left:3px solid #0078d4}.task-item.folder{font-weight:500}.task-content{display:flex;align-items:center;flex:1;gap:8px;min-width:0}.task-name-column{flex:1;min-width:0;overflow:hidden}.task-date-column{width:45px;flex-shrink:0;font-size:11px;color:#666;text-align:center;margin-left:4px}.task-date-column:last-of-type{margin-right:4px}.task-duration-column{width:58px;flex-shrink:0;font-size:11px;color:#666;text-align:center;margin-left:4px;padding-right:4px}.collapse-button{background:none;border:none;cursor:pointer;padding:0;margin-right:6px;font-size:10px;width:16px;height:16px;display:flex;align-items:center;justify-content:center;color:#666}.collapse-button:hover{color:#333}.task-bullet{margin-right:6px;color:#999;font-size:14px;width:16px;text-align:center}.task-name{flex:1;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.task-name-input{flex:1;border:1px solid #0078d4;padding:2px 6px;font-size:13px;outline:none;background-color:#fff}.root-drop-zone{padding:20px;margin:8px;border:none;border-radius:4px;text-align:center;color:transparent;font-size:12px;background-color:transparent;transition:all .2s}.root-drop-zone:hover{border:none;background-color:transparent;color:transparent}.drop-indicator{position:absolute;top:0;left:0;right:0;height:3px;background-color:#0078d4;z-index:100;pointer-events:none;box-shadow:0 0 4px #0078d480}.hover-add-indicator{position:absolute;top:-8px;left:0;right:0;height:16px;z-index:100;cursor:pointer;display:flex;align-items:center;justify-content:center}.hover-add-indicator:before{content:"";position:absolute;top:50%;left:0;right:0;height:2px;background-color:#0078d4;box-shadow:0 0 3px #0078d466;transform:translateY(-50%)}.hover-add-icon{position:relative;width:12px;height:12px;background-color:#0078d4;color:#fff;border-radius:2px;font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center;line-height:1;transition:all .2s;box-shadow:0 0 4px #0078d480;z-index:1}.hover-add-indicator:hover .hover-add-icon{background-color:#005a9e;transform:scale(1.2)}.modal-overlay{position:fixed;inset:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:2000}.modal-content{background-color:#fff;border-radius:4px;min-width:400px;max-width:600px;box-shadow:0 4px 16px #0003}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid #e0e0e0}.modal-header h2{margin:0;font-size:18px;font-weight:500}.modal-close{background:none;border:none;font-size:28px;cursor:pointer;color:#666;padding:0;width:32px;height:32px;line-height:32px;text-align:center}.modal-close:hover{color:#333}.modal-body{padding:0 20px 20px}.timeline-header{display:flex;flex-direction:column;height:60px;background-color:#fff}.timeline-months-row{display:flex;height:30px;border-bottom:1px solid #e0e0e0}.timeline-month{display:flex;align-items:center;justify-content:center;border-right:1px solid #e0e0e0;font-size:11px;font-weight:600;color:#333;flex-shrink:0}.timeline-days-row{display:flex;height:30px}.timeline-day{border-right:1px solid #e8e8e8;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:11px;flex-shrink:0}.day-label{padding:4px;font-weight:500;color:#333}.month-label{font-size:10px;color:#666;font-weight:600;padding:2px 4px}.timeline-column-headers{display:flex;align-items:center;gap:8px;padding:0 8px}.header-name,.header-date,.header-duration{white-space:nowrap;font-size:11px;font-weight:600;color:#333}.header-name{flex:1;min-width:80px}.header-date{width:45px;flex-shrink:0}.header-duration{width:58px;flex-shrink:0}.task-list-content{position:relative}.gantt-body{position:relative;background-color:#fafafa;min-height:100%;cursor:grab;will-change:scroll-position}.today-line{position:absolute;top:0;width:2px;background-color:gold;pointer-events:none;z-index:100;box-shadow:0 0 4px #ffd70099}.gantt-body:active{cursor:grabbing}.gantt-bar{position:absolute;border-radius:4px;display:flex;align-items:center;cursor:pointer;transition:box-shadow .2s;padding:4px 0;will-change:transform;transform:translateZ(0);backface-visibility:hidden}.gantt-bar.task{color:#000}.gantt-bar.folder{font-weight:500;color:#fff;padding:0;cursor:default;height:20px!important;margin-top:8px}.gantt-bar.folder .resize-handle{display:none}.gantt-bar.folder .bar-content{cursor:default;height:20px}.gantt-bar:hover{box-shadow:0 2px 8px #0003}.gantt-bar.focused{box-shadow:0 0 0 2px #0078d4}.resize-handle{width:8px;height:100%;cursor:ew-resize;position:absolute;top:0;z-index:10}.resize-handle.left{left:0}.resize-handle.right{right:0}.resize-handle:hover{background-color:#ffffff4d}.bar-content{flex:1;padding:0 12px;overflow:hidden;cursor:move;-webkit-user-select:none;user-select:none;display:flex;align-items:center;height:100%}.bar-label{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.task-edit-form{padding:8px 0}.form-group{margin-bottom:12px}.form-group label{display:block;margin-bottom:6px;font-weight:500;font-size:14px;color:#333}.form-input{width:100%;padding:8px 12px;border:1px solid #d0d0d0;border-radius:4px;font-size:14px;font-family:inherit;outline:none;transition:border-color .2s}.form-input:focus{border-color:#0078d4}.form-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:16px}.btn{padding:8px 16px;border:none;border-radius:4px;font-size:14px;font-weight:500;cursor:pointer;transition:background-color .2s}.btn-primary{background-color:#0078d4;color:#fff}.btn-primary:hover{background-color:#005a9e}.btn-secondary{background-color:#f0f0f0;color:#333}.btn-secondary:hover{background-color:#e0e0e0}.color-picker-input{width:60px;height:60px;border:2px solid #d0d0d0;border-radius:4px;cursor:pointer;padding:4px;background-color:#fff}.color-picker-input:hover{border-color:#0078d4}.color-picker-input::-webkit-color-swatch-wrapper{padding:0}.color-picker-input::-webkit-color-swatch{border:none;border-radius:2px}.color-picker-input::-moz-color-swatch{border:none;border-radius:2px}.pdf-export-modal{padding:0}.export-description{margin-bottom:8px;color:#333;line-height:1.5}.export-subtitle{font-weight:600;margin-bottom:20px;color:#333}.export-options{display:flex;gap:20px;margin-top:20px}.export-option{flex:1;display:flex;flex-direction:column;align-items:center;padding:20px;border:2px solid #e0e0e0;border-radius:8px;background:#fff;cursor:pointer;transition:all .2s ease}.export-option:hover{border-color:#0078d4;box-shadow:0 4px 12px #0078d426;transform:translateY(-2px)}.export-option:active{transform:translateY(0)}.export-icon{width:120px;height:100px;margin-bottom:15px}.export-icon svg{width:100%;height:100%}.export-option-content{text-align:center}.export-option-content h3{margin:0 0 8px;font-size:18px;color:#333}.export-option-content p{margin:0 0 12px;font-size:14px;color:#666}.export-option-content ul{list-style:none;padding:0;margin:0;text-align:left}.export-option-content li{font-size:13px;color:#666;margin-bottom:6px;padding-left:20px;position:relative}.export-option-content li:before{content:"•";position:absolute;left:8px;color:#0078d4}.export-option:hover .a4-icon rect{stroke:#0078d4;fill:#f0f8ff}.export-option:hover .wide-icon rect{stroke:#50c878;fill:#f0fff4}.welcome-modal-container{max-width:720px}.welcome-modal{padding:0}.welcome-subtitle{font-weight:600;margin-bottom:20px;color:#333;text-align:center}.welcome-options{display:flex;gap:20px;margin-top:20px}.welcome-option{flex:1;display:flex;flex-direction:column;align-items:center;padding:20px;border:2px solid #e0e0e0;border-radius:8px;background:#fff;cursor:pointer;transition:all .2s ease}.welcome-option:hover{border-color:#0078d4;box-shadow:0 4px 12px #0078d426;transform:translateY(-2px)}.welcome-option:active{transform:translateY(0)}.welcome-icon{width:120px;height:100px;margin-bottom:15px}.welcome-icon svg{width:100%;height:100%}.welcome-option-content{text-align:center}.welcome-option-content h3{margin:0 0 8px;font-size:18px;color:#333}.welcome-option-content p{margin:0 0 12px;font-size:14px;color:#666}.welcome-option-content ul{list-style:none;padding:0;margin:0;text-align:left}.welcome-option-content li{font-size:13px;color:#666;margin-bottom:6px;padding-left:20px;position:relative}.welcome-option-content li:before{content:"•";position:absolute;left:8px;color:#0078d4}.welcome-option:hover .demo-icon rect:first-child{stroke:#0078d4;fill:#f0f8ff}.welcome-option:hover .blank-icon rect:first-child{stroke:#50c878;fill:#f0fff4}.welcome-option:hover .load-icon rect:first-child{stroke:#ffb800;fill:#fffbeb}.app{display:flex;flex-direction:column;height:100vh;overflow:hidden}.app-header{background-color:#fff;border-bottom:1px solid #e0e0e0;padding:8px 20px;display:flex;align-items:center;justify-content:space-between}.logo{display:flex;align-items:center;gap:8px;width:140px}.logo-icon{height:20px;width:20px;flex-shrink:0}.logo-text{font-size:16px;color:#0078d4;font-weight:600;white-space:nowrap}.logo-beta{font-size:11px;color:#777;font-weight:400;margin-left:-6px;position:relative;top:-3px}.project-title-container{display:flex;align-items:center;flex:1;justify-content:center}.project-title{font-size:20px;font-weight:500;margin:0;cursor:pointer;padding:4px 12px;border-radius:4px;transition:background-color .2s}.project-title:hover{background-color:#f5f5f5}.project-title-input{font-size:20px;font-weight:500;padding:4px 12px;border:2px solid #0078d4;border-radius:4px;outline:none;font-family:inherit}.main-content{display:flex;flex-direction:column;flex:1;overflow:hidden}.timeline-row{display:flex;height:60px;border-bottom:2px solid #e0e0e0;background-color:#fff}.timeline-spacer{border-right:1px solid #e0e0e0;background-color:#fff;display:flex;flex-direction:column;flex-shrink:0;position:relative;z-index:20}.timeline-toolbar-row{display:flex;gap:6px;padding:0 12px;align-items:center;flex:1}.timeline-toolbar-button{width:24px;height:24px;border:none;background-color:transparent;border-radius:3px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#666;transition:all .2s}.timeline-toolbar-button:hover{background-color:#e8f4ff;color:#0078d4}.timeline-toolbar-button:active{transform:scale(.95)}.timeline-column-headers{display:flex;align-items:center;padding:0 8px;height:30px;background-color:#f0f0f0;border-top:1px solid #e0e0e0;font-size:11px;font-weight:600;color:#333;text-transform:uppercase;letter-spacing:0;position:relative;z-index:10}.timeline-column-headers .header-name{flex:1;min-width:80px;padding-left:22px}.timeline-column-headers .header-date{width:45px;flex-shrink:0;text-align:center;margin-left:4px}.timeline-column-headers .header-date:last-of-type{margin-right:4px}.timeline-column-headers .header-duration{width:58px;flex-shrink:0;text-align:center;margin-left:4px;padding-right:4px}.timeline-scroll-wrapper{flex:1;overflow-x:hidden;overflow-y:hidden;position:relative}.content-row{display:flex;flex:1;overflow:hidden}.task-list-panel{overflow-y:auto;overflow-x:hidden;border-right:1px solid #e0e0e0;flex-shrink:0;min-width:300px}.resize-handle{width:1px;cursor:col-resize;background-color:#e0e0e0;position:relative;flex-shrink:0;transition:background-color .2s}.resize-handle:hover{background-color:#0078d4}.resize-handle:after{content:"";position:absolute;inset:0 -3px}.gantt-panel{flex:1;overflow:scroll;position:relative;scrollbar-gutter:stable;scrollbar-width:auto;scrollbar-color:#888 #e8e8e8}.gantt-panel::-webkit-scrollbar{width:14px;height:14px;-webkit-appearance:none}.gantt-panel::-webkit-scrollbar:horizontal{height:14px}.gantt-panel::-webkit-scrollbar:vertical{width:14px}.gantt-panel::-webkit-scrollbar-track{background:#e8e8e8;border:1px solid #d0d0d0}.gantt-panel::-webkit-scrollbar-thumb{background:#888;border-radius:7px;border:2px solid #e8e8e8;min-height:30px;min-width:30px}.gantt-panel::-webkit-scrollbar-thumb:hover{background:#555}.gantt-panel::-webkit-scrollbar-corner{background:#e8e8e8}.task-list-panel::-webkit-scrollbar{width:12px}.task-list-panel::-webkit-scrollbar-track{background:#f1f1f1}.task-list-panel::-webkit-scrollbar-thumb{background:#888;border-radius:6px}.task-list-panel::-webkit-scrollbar-thumb:hover{background:#555}.app-footer{height:30px;background-color:#f5f5f5;border-top:1px solid #e0e0e0;display:flex;align-items:center;justify-content:space-between;padding:0 12px;font-size:11px;color:#666;flex-shrink:0}.app-footer a{color:#0078d4;text-decoration:none}.app-footer a:hover{text-decoration:underline}.about-modal-content{line-height:1.6;color:#333}.about-logo-container{display:flex;flex-direction:column;align-items:center;margin-bottom:32px;padding:24px 0;background:linear-gradient(135deg,#f8f9fa,#fff);border-radius:8px}.about-logo{height:64px;width:64px;margin-bottom:16px;filter:drop-shadow(0 2px 8px rgba(0,120,212,.15))}.about-logo-text{font-size:28px;color:#0078d4;font-weight:600;margin:0;letter-spacing:-.5px}.about-modal-content p{margin:0 0 16px}.about-modal-content p:last-child{margin-bottom:0}.about-modal-content a{color:#0078d4;text-decoration:none;font-weight:500}.about-modal-content a:hover{text-decoration:underline}.support-modal-content{line-height:1.6;color:#333}.support-logo-container{display:flex;justify-content:center;align-items:center;margin-bottom:32px;padding:32px 0;background:linear-gradient(135deg,#f8f9fa,#fff);border-radius:8px}.support-logo-text{font-size:36px;font-weight:300;margin:0;color:#333;letter-spacing:-.5px}.support-logo-bracket{font-weight:600;color:#0078d4}.support-modal-content p{margin:0 0 24px;text-align:center}.support-modal-content em{font-style:italic;font-weight:500;color:#0078d4}.support-button-container{display:flex;justify-content:center;margin-top:32px}.support-button{display:inline-block;padding:12px 32px;background:linear-gradient(135deg,#0078d4,#005a9e);color:#fff;text-decoration:none;border-radius:6px;font-size:16px;font-weight:600;box-shadow:0 2px 8px #0078d44d;transition:all .2s ease}.support-button:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0078d466;background:linear-gradient(135deg,#006bc7,#004d8a)}