:root{--color-primary: #3B82F6;--color-primary-dark: #2563EB;--color-primary-light: #60A5FA;--color-success: #10B981;--color-warning: #F59E0B;--color-error: #EF4444;--color-info: #06B6D4;--color-bg-primary: #FFFFFF;--color-bg-secondary: #F9FAFB;--color-bg-tertiary: #F3F4F6;--color-bg-hover: #F3F4F6;--color-border: #E5E7EB;--color-border-dark: #D1D5DB;--color-text-primary: #111827;--color-text-secondary: #6B7280;--color-text-tertiary: #9CA3AF;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;--font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--radius-sm: .25rem;--radius-md: .375rem;--radius-lg: .5rem;--transition-fast: .15s ease-in-out;--transition-base: .2s ease-in-out;--transition-slow: .3s ease-in-out;--row-height: 40px;--header-height: 48px;--toolbar-height: 56px;--column-min-width: 120px}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{font-family:var(--font-family);font-size:var(--font-size-base);color:var(--color-text-primary);background-color:var(--color-bg-secondary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{height:100%}::-webkit-scrollbar{width:12px;height:12px}::-webkit-scrollbar-track{background:var(--color-bg-tertiary)}::-webkit-scrollbar-thumb{background:var(--color-border-dark);border-radius:var(--radius-lg)}::-webkit-scrollbar-thumb:hover{background:var(--color-text-tertiary)}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-sm{gap:var(--spacing-sm)}.gap-md{gap:var(--spacing-md)}.p-sm{padding:var(--spacing-sm)}.p-md{padding:var(--spacing-md)}.px-md{padding-left:var(--spacing-md);padding-right:var(--spacing-md)}.py-sm{padding-top:var(--spacing-sm);padding-bottom:var(--spacing-sm)}.text-sm{font-size:var(--font-size-sm)}.text-xs{font-size:var(--font-size-xs)}.font-medium{font-weight:500}.font-semibold{font-weight:600}.text-secondary{color:var(--color-text-secondary)}button{font-family:inherit;font-size:var(--font-size-sm);font-weight:500;padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-primary);color:var(--color-text-primary);cursor:pointer;transition:all var(--transition-fast)}button:hover{background:var(--color-bg-hover);border-color:var(--color-border-dark)}button:active{transform:translateY(1px)}button.primary{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}button.primary:hover{background:var(--color-primary-dark);border-color:var(--color-primary-dark)}button:disabled{opacity:.5;cursor:not-allowed}input,select,textarea{font-family:inherit;font-size:var(--font-size-sm);padding:var(--spacing-sm);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-primary);color:var(--color-text-primary);transition:border-color var(--transition-fast)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #3b82f61a}input::placeholder{color:var(--color-text-tertiary)}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn var(--transition-base)}.modal-content{background:var(--color-bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);max-width:90vw;max-height:90vh;overflow:auto;animation:slideUp var(--transition-base)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.grid-container{display:flex;flex-direction:column;height:100%;background:var(--color-bg-primary);border-right:1px solid var(--color-border);overflow:hidden}.grid-main{flex:1 1 0%;min-height:0;display:flex;flex-direction:column;overflow-x:auto;overflow-y:hidden;position:relative}.grid-header{display:flex;background:var(--color-bg-tertiary);border-bottom:2px solid var(--color-border-dark);height:var(--header-height);position:sticky;top:0;z-index:20;flex-shrink:0;margin:0;min-width:max-content}.grid-header-cell{flex:1 1 auto;min-width:100px;max-width:400px;padding:var(--spacing-sm) var(--spacing-md);font-weight:600;font-size:var(--font-size-sm);color:var(--color-text-primary);border-right:1px solid var(--color-border);display:flex;align-items:center;justify-content:space-between;cursor:pointer;-webkit-user-select:none;user-select:none;transition:background var(--transition-fast);box-sizing:border-box;position:relative}.grid-header-cell .resize-handle{position:absolute;right:0;top:0;bottom:0;width:8px;cursor:col-resize;z-index:1;background:transparent}.grid-header-cell .resize-handle:hover{background:var(--color-primary);opacity:.3}.grid-header-cell:hover{background:var(--color-bg-hover)}.grid-header-cell.dragging{opacity:.5}.grid-filter-row{display:flex;background:var(--color-bg-secondary);border-bottom:1px solid var(--color-border);padding:6px 0;flex-shrink:0;position:sticky;top:var(--header-height);z-index:19;min-width:max-content}.grid-body{flex:1 1 0%;min-height:0;overflow-y:auto;overflow-x:hidden;scrollbar-gutter:stable;min-width:max-content}.grid-row{display:flex;border-bottom:1px solid var(--color-border);min-height:40px;align-items:stretch;transition:background-color var(--transition-fast);cursor:pointer;flex-shrink:0}.grid-row:hover{background-color:var(--color-bg-secondary)}.grid-row.selected{background-color:#3b82f61a;box-shadow:inset 3px 0 0 var(--color-primary)}.drag-handle{display:flex;align-items:center;justify-content:center;width:32px;flex:0 0 32px;color:var(--color-text-tertiary);cursor:grab;font-size:14px;-webkit-user-select:none;user-select:none;flex-shrink:0}.grid-checkbox-col{width:40px;flex:0 0 40px;display:flex;align-items:center;justify-content:center;border-right:1px solid var(--color-border);background:var(--color-bg-tertiary);flex-shrink:0}.grid-row .grid-checkbox-col{background:transparent}.drag-handle:hover{color:var(--color-text-primary);background-color:var(--color-bg-tertiary)}.drag-handle:active{cursor:grabbing}.grid-row.dragging{opacity:.4}.grid-row.drop-target{border-top:3px solid var(--color-primary);background-color:#3b82f60d}.grid-cell{flex:1 1 auto;min-width:100px;max-width:400px;padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-sm);color:var(--color-text-primary);border-right:1px solid var(--color-border);display:flex;align-items:flex-start;overflow:hidden;white-space:pre-wrap;word-wrap:break-word;box-sizing:border-box}.grid-cell.editable{cursor:text}.grid-cell.editing{padding:0}.grid-cell input,.grid-cell select{width:100%;height:100%;border:2px solid var(--color-primary);border-radius:0;padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-sm)}.grid-cell input:focus,.grid-cell select:focus{box-shadow:none}.grid-toolbar{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);background:var(--color-bg-primary);border-bottom:1px solid var(--color-border);height:var(--toolbar-height);box-sizing:border-box;flex-shrink:0}.grid-toolbar button{display:flex;align-items:center;gap:var(--spacing-sm)}.add-row-button{background:var(--color-success);color:#fff;border-color:var(--color-success)}.add-row-button:hover{background:#059669;border-color:#059669}.delete-row-button{background:var(--color-error);color:#fff;border-color:var(--color-error)}.delete-row-button:hover{background:#dc2626;border-color:#dc2626}.filter-dropdown{position:absolute;top:100%;left:0;background:var(--color-bg-primary);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-md);padding:var(--spacing-sm);min-width:200px;z-index:100;animation:slideDown var(--transition-fast)}@keyframes slideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.filter-input{width:100%;margin-bottom:var(--spacing-sm)}.status-badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:12px;font-size:var(--font-size-xs);font-weight:500;color:#fff}.column-config-panel{position:fixed;right:0;top:0;bottom:0;width:320px;background:var(--color-bg-primary);border-left:1px solid var(--color-border);box-shadow:var(--shadow-lg);z-index:999;display:flex;flex-direction:column;animation:slideInRight var(--transition-base)}@keyframes slideInRight{0%{transform:translate(100%)}to{transform:translate(0)}}.column-config-header{padding:var(--spacing-lg);border-bottom:1px solid var(--color-border);display:flex;justify-content:space-between;align-items:center}.column-config-list{flex:1;overflow-y:auto;padding:var(--spacing-md)}.column-config-item{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);background:var(--color-bg-secondary);border-radius:var(--radius-md);margin-bottom:var(--spacing-sm);cursor:move;transition:all var(--transition-fast)}.column-config-item:hover{background:var(--color-bg-tertiary);box-shadow:var(--shadow-sm)}.column-config-item.dragging{opacity:.5}.column-config-item input[type=checkbox]{cursor:pointer}.gantt-container{display:flex;flex-direction:column;height:100%;background:var(--color-bg-primary);overflow:hidden}.gantt-header{background:var(--color-bg-tertiary);border-bottom:2px solid var(--color-border-dark);height:var(--header-height);position:sticky;top:0;z-index:10;overflow-x:auto;overflow-y:hidden;flex-shrink:0;margin:0}.gantt-timeline{display:flex;height:100%;min-width:max-content}.timeline-unit{min-width:80px;flex-shrink:0;padding:var(--spacing-sm);font-size:var(--font-size-xs);font-weight:600;color:var(--color-text-secondary);text-align:center;border-right:1px solid var(--color-border);display:flex;align-items:center;justify-content:center;box-sizing:border-box}.timeline-unit[data-resolution=week]{min-width:120px}.timeline-unit[data-resolution=month]{min-width:150px}.timeline-unit[data-resolution=quarter]{min-width:200px}.timeline-unit[data-resolution=year]{min-width:250px}.gantt-body{flex:1 1 0%;min-height:0;overflow-x:auto;overflow-y:scroll;position:relative}.gantt-grid-background{position:absolute;inset:0;display:flex;pointer-events:none}.gantt-grid-column{min-width:80px;flex-shrink:0;border-right:1px solid var(--color-border)}.gantt-grid-column[data-resolution=week]{min-width:120px}.gantt-grid-column[data-resolution=month]{min-width:150px}.gantt-grid-column[data-resolution=quarter]{min-width:200px}.gantt-grid-column[data-resolution=year]{min-width:250px}.gantt-grid-column.today{background:#3b82f608;border-right:2px solid var(--color-primary)}.gantt-rows{position:relative;display:flex;flex-direction:column;width:max-content}.gantt-row{min-height:var(--row-height);border-bottom:1px solid var(--color-border);position:relative;transition:background var(--transition-fast);flex-shrink:0;box-sizing:border-box;width:100%}.gantt-row:hover{background:#3b82f605}.task-bar{position:absolute;height:24px;top:8px;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);display:flex;align-items:center;padding:0 var(--spacing-sm);font-size:var(--font-size-xs);font-weight:500;color:#fff;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;box-shadow:var(--shadow-sm)}.task-bar:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);z-index:10}.task-bar.status-not-started{background:linear-gradient(135deg,#9ca3af,#6b7280)}.task-bar.status-planning{background:linear-gradient(135deg,#60a5fa,#3b82f6)}.task-bar.status-in-progress{background:linear-gradient(135deg,#fbbf24,#f59e0b)}.task-bar.status-on-hold{background:linear-gradient(135deg,#f87171,#ef4444)}.task-bar.status-completed{background:linear-gradient(135deg,#34d399,#10b981)}.task-bar.status-cancelled{background:linear-gradient(135deg,#6b7280,#4b5563)}.task-tooltip{position:absolute;background:var(--color-text-primary);color:#fff;padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);font-size:var(--font-size-xs);white-space:nowrap;pointer-events:none;z-index:1000;box-shadow:var(--shadow-lg);animation:fadeIn var(--transition-fast)}.task-tooltip:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:6px solid transparent;border-top-color:var(--color-text-primary)}.gantt-toolbar{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);background:var(--color-bg-primary);border-bottom:1px solid var(--color-border);height:var(--toolbar-height);box-sizing:border-box;flex-shrink:0}.resolution-selector{display:flex;gap:var(--spacing-xs);background:var(--color-bg-secondary);padding:var(--spacing-xs);border-radius:var(--radius-md)}.resolution-button{padding:var(--spacing-xs) var(--spacing-md);border:none;background:transparent;color:var(--color-text-secondary);font-size:var(--font-size-xs);font-weight:500;border-radius:var(--radius-sm);transition:all var(--transition-fast)}.resolution-button:hover{background:var(--color-bg-hover);color:var(--color-text-primary)}.resolution-button.active{background:var(--color-primary);color:#fff}.gantt-empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--color-text-tertiary);gap:var(--spacing-md)}.gantt-empty-state svg{width:64px;height:64px;opacity:.5}.milestone-marker{position:absolute;top:0;bottom:0;width:2px;pointer-events:none;z-index:5}.milestone-line{position:absolute;top:0;bottom:0;width:100%;opacity:.3}.milestone-icon{position:absolute;top:4px;left:50%;transform:translate(-50%);width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-size:14px;cursor:pointer;pointer-events:all;transition:all var(--transition-fast);filter:drop-shadow(0 2px 4px rgba(0,0,0,.2))}.milestone-icon:hover{transform:translate(-50%) scale(1.3);filter:drop-shadow(0 4px 8px rgba(0,0,0,.3))}.milestone-type-milestone .milestone-icon{background:linear-gradient(135deg,#60a5fa,#3b82f6);clip-path:polygon(50% 0%,100% 50%,50% 100%,0% 50%)}.milestone-type-event .milestone-line{background:linear-gradient(to bottom,transparent 0%,var(--milestone-color, #10B981) 20%,var(--milestone-color, #10B981) 100%);border-left:2px dashed var(--milestone-color, #10B981)}.milestone-type-event .milestone-icon{background:var(--milestone-color, #10B981);border-radius:4px;color:#fff}.milestone-type-deadline .milestone-line{background:linear-gradient(to bottom,transparent 0%,#EF4444 20%,#EF4444 100%);border-left:3px solid #EF4444}.milestone-type-deadline .milestone-icon{background:#ef4444;border-radius:50%;color:#fff;font-weight:700}.milestone-tooltip{position:absolute;bottom:100%;left:50%;transform:translate(-50%);background:var(--color-text-primary);color:#fff;padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-md);font-size:var(--font-size-xs);white-space:nowrap;pointer-events:none;z-index:1000;margin-bottom:8px;opacity:0;transition:opacity var(--transition-fast);box-shadow:var(--shadow-md)}.milestone-icon:hover .milestone-tooltip{opacity:1}.milestone-tooltip:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:6px solid transparent;border-top-color:var(--color-text-primary)}.milestone-label{position:absolute;top:28px;left:50%;transform:translate(-50%) rotate(-45deg);transform-origin:left top;font-size:var(--font-size-xs);color:var(--color-text-secondary);white-space:nowrap;pointer-events:none;font-weight:500}