*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #007bff;--primary-hover: #0056b3;--secondary-color: #6c757d;--success-color: #28a745;--danger-color: #dc3545;--warning-color: #ffc107;--info-color: #17a2b8;--text-primary: #212529;--text-secondary: #6c757d;--text-light: #ffffff;--bg-primary: #ffffff;--bg-secondary: #f8f9fa;--bg-dark: #343a40;--border-color: #dee2e6;--border-radius: 8px;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-xxl: 3rem;--font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;--font-family-mono: "Courier New", Courier, monospace;--breakpoint-sm: 576px;--breakpoint-md: 768px;--breakpoint-lg: 992px;--breakpoint-xl: 1200px;--breakpoint-xxl: 1400px;--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);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--transition-base: all .2s ease-in-out}[data-theme=dark]{--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-light: #ffffff;--bg-primary: #1e293b;--bg-secondary: #0f172a;--bg-dark: #020617;--border-color: #334155;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4), 0 2px 4px -1px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4), 0 4px 6px -2px rgba(0, 0, 0, .3);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .4), 0 10px 10px -5px rgba(0, 0, 0, .3);color-scheme:dark}[data-theme=dark] input[type=date],[data-theme=dark] input[type=datetime-local],[data-theme=dark] 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#007bff1a}.login-button{width:100%;padding:var(--spacing-md);background-color:var(--primary-color);color:var(--text-light);border:none;border-radius:var(--border-radius);font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition-base);margin-top:var(--spacing-sm)}.login-button:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.login-button:active{transform:translateY(0)}.login-button:disabled{background-color:#9ca3af;cursor:not-allowed;transform:none}.login-button:disabled:hover{background-color:#9ca3af;transform:none;box-shadow:none}.form-group input:disabled{background-color:#f3f4f6;cursor:not-allowed}@media(min-width:768px){.login-card{padding:var(--spacing-xxl) 3rem}.login-title{font-size:2.5rem}}.dashboard-container{min-height:100vh;padding:var(--spacing-md)}.dashboard-content{max-width:1200px;margin:0 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.2s ease-out}@media(min-width:900px){.modal-container{max-width:800px}}@keyframes modalSlideIn{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-lg) var(--spacing-xl);border-bottom:1px solid var(--border-color)}.modal-title{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin:0}.modal-close{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:none;border:none;cursor:pointer;border-radius:var(--border-radius);color:var(--text-secondary);transition:var(--transition-base)}.modal-close:hover{background-color:var(--bg-secondary);color:var(--text-primary)}.modal-close svg{width:20px;height:20px}.modal-error{background-color:#fef2f2;border:1px solid #dc2626;color:#dc2626;padding:var(--spacing-md);margin:var(--spacing-md) var(--spacing-xl) 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input[type=datetime-local]{color-scheme:dark}.no-date-checkbox{display:flex;align-items:center;gap:var(--spacing-xs);cursor:pointer;font-size:.85rem;color:var(--text-secondary)}.no-date-checkbox input[type=checkbox]{width:16px;height:16px;cursor:pointer}.no-date-checkbox span{font-weight:400}.modal-actions{display:flex;justify-content:space-between;align-items:center;gap:var(--spacing-md);padding-top:var(--spacing-md);border-top:1px solid var(--border-color);margin-top:var(--spacing-md)}.modal-actions-right{display:flex;gap:var(--spacing-md);margin-left:auto}.btn-primary,.btn-secondary{padding:var(--spacing-md) var(--spacing-xl);border-radius:var(--border-radius);font-size:1rem;font-weight:500;cursor:pointer;transition:var(--transition-base)}.btn-primary{background-color:var(--primary-color);color:var(--text-light);border:none}.btn-primary:hover{background-color:var(--primary-hover)}.btn-primary:disabled{background-color:#9ca3af;cursor:not-allowed}.btn-secondary{background-color:transparent;color:var(--text-secondary);border:1px solid var(--border-color)}.btn-secondary:hover{background-color:var(--bg-secondary);color:var(--text-primary)}.btn-secondary:disabled{cursor:not-allowed;opacity:.6}.btn-danger{padding:var(--spacing-md) var(--spacing-xl);border-radius:var(--border-radius);font-size:1rem;font-weight:500;cursor:pointer;transition:var(--transition-base);background-color:#dc2626;color:#fff;border:none}.btn-danger:hover{background-color:#b91c1c}.btn-danger:disabled{background-color:#f87171;cursor:not-allowed}.confirm-overlay{position:absolute;inset:0;background-color:#0006;display:flex;align-items:center;justify-content:center;border-radius:12px;z-index:10}.confirm-dialog{background:var(--bg-primary);border-radius:var(--border-radius);box-shadow:var(--shadow-xl);padding:var(--spacing-xl);margin:var(--spacing-md);max-width:400px;width:100%;animation:modalSlideIn .15s ease-out}.confirm-title{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin:0 0 var(--spacing-md) 0}.confirm-message{color:var(--text-secondary);margin:0 0 var(--spacing-xl) 0;line-height:1.5}.confirm-actions{display:flex;justify-content:flex-end;gap:var(--spacing-md)}@media(max-width:480px){.modal-container{max-height:100vh;border-radius:0}.modal-overlay{padding:0}.modal-actions{flex-direction:column;gap:var(--spacing-sm)}.modal-actions .btn-danger{order:3}.modal-actions-right{flex-direction:column-reverse;width:100%;gap:var(--spacing-sm)}.modal-actions button,.modal-actions-right button{width:100%}.confirm-dialog{margin:var(--spacing-sm)}.confirm-actions{flex-direction:column-reverse;gap:var(--spacing-sm)}.confirm-actions button{width:100%}}.task-list-container{min-height:100vh;padding:var(--spacing-xs)}.task-list-content{max-width:1400px;margin:0 auto}.task-list-header{display:flex;flex-direction:column;gap:var(--spacing-md);margin-bottom:var(--spacing-md)}.task-list-title{font-size:1.5rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--spacing-xs)}.task-list-subtitle{color:var(--text-secondary);font-size:.9rem;margin-bottom:0}.btn-new-task{display:inline-flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);background-color:var(--primary-color);color:var(--text-light);border:none;border-radius:var(--border-radius);font-size:.9rem;font-weight:500;cursor:pointer;transition:var(--transition-base);align-self:flex-start}.btn-new-task:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-new-task:active{transform:translateY(0)}.btn-new-task svg{width:20px;height:20px}.task-list-sort-controls{margin-bottom:var(--spacing-md)}.sort-control-group{display:flex;align-items:center;gap:var(--spacing-sm);flex-wrap:nowrap}.sort-label{font-size:.9rem;color:var(--text-secondary);font-weight:500;white-space:nowrap}.sort-select{padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--border-color);border-radius:var(--border-radius);font-size:.9rem;background-color:var(--bg-primary);color:var(--text-primary);cursor:pointer;transition:var(--transition-base);min-width:130px;max-width:180px}.sort-select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #007bff1a}.btn-sort-direction{display:inline-flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--border-color);border-radius:var(--border-radius);background-color:var(--bg-primary);color:var(--text-primary);font-size:.9rem;font-weight:500;cursor:pointer;transition:var(--transition-base)}.btn-sort-direction:hover{background-color:var(--bg-secondary);border-color:var(--primary-color)}.btn-sort-direction svg{width:16px;height:16px}.btn-sort-direction.asc svg{color:var(--primary-color)}.btn-sort-direction.desc svg{color:var(--primary-color)}.task-list-error{background-color:#fef2f2;border:1px solid #dc2626;color:#dc2626;padding:var(--spacing-md);border-radius:var(--border-radius);margin-bottom:var(--spacing-lg)}.task-list-loading{text-align:center;padding:var(--spacing-xxl);color:var(--text-secondary);font-size:1.1rem}.priority-columns{display:flex;flex-direction:column;gap:var(--spacing-sm)}.priority-column{background:var(--bg-primary);border-radius:var(--border-radius);box-shadow:var(--shadow-sm);overflow:hidden;transition:var(--transition-base)}.priority-column.drag-over{box-shadow:var(--shadow-lg);transform:scale(1.01)}.priority-column-header{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm);border-left:4px solid;cursor:pointer;-webkit-user-select:none;user-select:none;transition:var(--transition-base)}.priority-column-header:hover{filter:brightness(.97)}.column-toggle-icon{width:20px;height:20px;color:var(--text-secondary);transition:transform .2s ease;flex-shrink:0}.column-toggle-icon.expanded{transform:rotate(180deg)}.priority-badge{width:12px;height:12px;border-radius:50%;flex-shrink:0}.priority-column-title{font-size:1rem;font-weight:600;color:#212529;margin:0;flex:1}.priority-count{background:#0000001a;padding:2px 8px;border-radius:12px;font-size:.85rem;font-weight:500;color:#6c757d}.priority-column-tasks{padding:var(--spacing-xs);display:flex;flex-direction:column;gap:var(--spacing-xs);min-height:60px}.priority-column-empty{text-align:center;padding:var(--spacing-lg);color:var(--text-secondary);font-style:italic}.task-card-wrapper{display:flex;flex-direction:column}.drop-indicator{height:3px;background-color:var(--primary-color);border-radius:2px;margin:var(--spacing-xs) 0;animation:dropIndicatorPulse .5s ease-in-out infinite alternate}@keyframes dropIndicatorPulse{0%{opacity:.5}to{opacity:1}}.task-card{padding:var(--spacing-sm);border-radius:var(--border-radius);border:2px solid;cursor:grab;transition:var(--transition-base);touch-action:none;--card-text-primary: #212529;--card-text-secondary: #6c757d}.task-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.task-card:active{cursor:grabbing}.task-card.dragging{opacity:.5;transform:rotate(2deg)}.task-card.expired{opacity:.8}.task-card-title{font-size:.95rem;font-weight:600;color:var(--card-text-primary);margin:0 0 var(--spacing-xs) 0}.task-card-description{font-size:.85rem;color:var(--card-text-secondary);margin:0 0 var(--spacing-sm) 0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.task-card-due{display:flex;align-items:center;gap:var(--spacing-xs);font-size:.8rem;color:var(--card-text-secondary)}.task-card-due svg{width:14px;height:14px}.task-card-due.expired{color:#dc2626;font-weight:500}@media(min-width:768px){.task-list-container{padding:var(--spacing-lg)}.task-list-header{flex-direction:row;justify-content:space-between;align-items:flex-start;gap:var(--spacing-lg);margin-bottom:var(--spacing-lg)}.task-list-sort-controls{margin-bottom:var(--spacing-lg)}.task-list-title{font-size:2rem;margin-bottom:var(--spacing-sm)}.task-list-subtitle{font-size:1rem}.btn-new-task{align-self:center;padding:var(--spacing-md) var(--spacing-xl);font-size:1rem;gap:var(--spacing-sm)}.priority-columns{gap:var(--spacing-lg)}.priority-column-header{padding:var(--spacing-md) var(--spacing-lg);gap:var(--spacing-sm)}.priority-column-tasks{padding:var(--spacing-md);gap:var(--spacing-sm);min-height:100px}}@media(min-width:1024px){.priority-columns{flex-direction:row;align-items:flex-start}.priority-column{flex:1;min-width:0}.priority-column-tasks{min-height:400px}.priority-column-header{cursor:default}.priority-column-header:hover{filter:none}}@media(min-width:1200px){.task-list-title{font-size:2.25rem}}.drag-ghost{background-color:var(--primary-color);color:#fff;padding:8px 16px;border-radius:var(--border-radius);box-shadow:var(--shadow-lg);max-width:200px;font-size:.9rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.drag-ghost-content{max-width:100%;overflow:hidden;text-overflow:ellipsis}.priority-columns.touch-dragging{user-select:none;-webkit-user-select:none}.priority-columns.touch-dragging .task-card{transition:transform .15s ease,opacity .15s ease}.priority-columns.touch-dragging .task-card.dragging{opacity:.4;transform:scale(.95)}.priority-column.drop-target .priority-column-tasks{background-color:rgba(var(--primary-rgb),.1);border:2px dashed var(--primary-color);border-radius:var(--border-radius)}.task-card{touch-action:none;-webkit-touch-callout:none}.details-modal-overlay{position:fixed;inset:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--spacing-md)}.details-modal-container{position:relative;background:var(--bg-primary);border-radius:12px;box-shadow:var(--shadow-xl);width:100%;max-width:600px;max-height:90vh;overflow-y:auto;animation:detailsModalSlideIn .2s ease-out}@keyframes detailsModalSlideIn{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.details-modal-header{display:flex;align-items:flex-start;justify-content:space-between;padding:var(--spacing-lg) var(--spacing-xl);border-bottom:3px solid;gap:var(--spacing-md)}.details-header-content{flex:1;min-width:0}.details-priority-badge{display:inline-block;padding:4px 12px;border-radius:16px;font-size:.75rem;font-weight:600;color:#fff;text-transform:uppercase;margin-bottom:var(--spacing-sm)}.details-modal-title{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin:0;word-wrap:break-word}.details-modal-close{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:#fffc;border:none;cursor:pointer;border-radius:var(--border-radius);color:var(--text-secondary);transition:var(--transition-base);flex-shrink:0}.details-modal-close:hover{background-color:#fff;color:var(--text-primary)}.details-modal-close svg{width:20px;height:20px}.details-modal-error{background-color:#fef2f2;border:1px solid #dc2626;color:#dc2626;padding:var(--spacing-md);margin:var(--spacing-md) var(--spacing-xl) 0;border-radius:var(--border-radius);font-size:.9rem}.details-modal-body{padding:var(--spacing-xl)}.details-section{margin-bottom:var(--spacing-lg)}.details-section:last-child{margin-bottom:0}.details-section-title{display:flex;align-items:center;gap:var(--spacing-sm);font-size:.9rem;font-weight:600;color:var(--text-secondary);margin:0 0 var(--spacing-sm) 0;text-transform:uppercase;letter-spacing:.5px}.details-section-title svg{width:18px;height:18px}.details-section-content{font-size:1rem;color:var(--text-primary);margin:0;line-height:1.6;white-space:pre-wrap;background-color:var(--bg-secondary);padding:var(--spacing-md);border-radius:var(--border-radius)}.details-info-grid{display:grid;grid-template-columns:1fr;gap:var(--spacing-md);margin-top:var(--spacing-lg);padding-top:var(--spacing-lg);border-top:1px solid var(--border-color)}.details-info-item{display:flex;flex-direction:column;gap:var(--spacing-xs)}.details-info-label{display:flex;align-items:center;gap:var(--spacing-xs);font-size:.85rem;font-weight:500;color:var(--text-secondary)}.details-info-label svg{width:16px;height:16px}.details-info-value{font-size:1rem;color:var(--text-primary);padding-left:24px}.details-modal-actions{display:flex;justify-content:flex-end;gap:var(--spacing-md);padding:var(--spacing-lg) var(--spacing-xl);border-top:1px solid var(--border-color);background-color:var(--bg-secondary);border-radius:0 0 12px 12px}.details-modal-actions .btn-danger,.details-modal-actions .btn-warning{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md) var(--spacing-lg);border-radius:var(--border-radius);font-size:.95rem;font-weight:500;cursor:pointer;transition:var(--transition-base);border:none}.details-modal-actions .btn-danger svg,.details-modal-actions .btn-warning svg{width:18px;height:18px}.details-modal-actions .btn-danger{background-color:#dc2626;color:#fff}.details-modal-actions .btn-danger:hover{background-color:#b91c1c}.details-modal-actions .btn-danger:disabled{background-color:#f87171;cursor:not-allowed}.btn-warning{background-color:#f59e0b;color:#fff}.btn-warning:hover{background-color:#d97706}.btn-warning:disabled{background-color:#fbbf24;cursor:not-allowed}.details-modal-container .confirm-overlay{position:absolute;inset:0;background-color:#0006;display:flex;align-items:center;justify-content:center;border-radius:12px;z-index:10}.details-modal-container .confirm-dialog{background:var(--bg-primary);border-radius:var(--border-radius);box-shadow:var(--shadow-xl);padding:var(--spacing-xl);margin:var(--spacing-md);max-width:400px;width:100%;animation:detailsModalSlideIn .15s ease-out}.details-modal-container .confirm-title{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin:0 0 var(--spacing-md) 0}.details-modal-container .confirm-message{color:var(--text-secondary);margin:0 0 var(--spacing-xl) 0;line-height:1.5}.details-modal-container .confirm-actions{display:flex;justify-content:flex-end;gap:var(--spacing-md)}.details-modal-container .btn-secondary{padding:var(--spacing-md) var(--spacing-xl);border-radius:var(--border-radius);font-size:1rem;font-weight:500;cursor:pointer;transition:var(--transition-base);background-color:transparent;color:var(--text-secondary);border:1px solid var(--border-color)}.details-modal-container .btn-secondary:hover{background-color:var(--bg-secondary);color:var(--text-primary)}.details-modal-container .btn-secondary:disabled{cursor:not-allowed;opacity:.6}.details-modal-container .confirm-actions .btn-danger{padding:var(--spacing-md) var(--spacing-xl)}@media(min-width:600px){.details-info-grid{grid-template-columns:1fr 1fr}}@media(max-width:480px){.details-modal-container{max-height:100vh;border-radius:0}.details-modal-overlay{padding:0}.details-modal-header{padding:var(--spacing-md)}.details-modal-title{font-size:1.25rem}.details-modal-body{padding:var(--spacing-md)}.details-modal-actions{flex-direction:column;padding:var(--spacing-md);gap:var(--spacing-sm)}.details-modal-actions .btn-danger,.details-modal-actions .btn-warning{width:100%;justify-content:center}.details-modal-container .confirm-dialog{margin:var(--spacing-sm)}.details-modal-container .confirm-actions{flex-direction:column-reverse;gap:var(--spacing-sm)}.details-modal-container .confirm-actions button{width:100%}}.task-history-container{min-height:100vh;padding:var(--spacing-sm)}.task-history-content{max-width:1200px;margin:0 auto}.task-history-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-md)}.task-history-title{font-size:1.5rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--spacing-xs)}.task-history-subtitle{color:var(--text-secondary);font-size:.9rem}.task-history-filters{display:flex;flex-wrap:wrap;gap:var(--spacing-sm);align-items:flex-end;margin-bottom:var(--spacing-lg);padding:var(--spacing-md);background-color:var(--bg-secondary);border-radius:var(--border-radius);border:1px solid var(--border-color)}.filter-group{display:flex;flex-direction:column;gap:var(--spacing-xs);flex:1;min-width:140px}.filter-label{font-size:.85rem;font-weight:500;color:var(--text-secondary)}.filter-input{padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--border-color);border-radius:var(--border-radius);font-size:.95rem;background-color:var(--bg-primary);color:var(--text-primary);transition:var(--transition-base)}.filter-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px rgba(var(--primary-rgb),.1)}.btn-filter{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-lg);background-color:var(--primary-color);color:#fff;border:none;border-radius:var(--border-radius);font-size:.95rem;font-weight:500;cursor:pointer;transition:var(--transition-base);white-space:nowrap}.btn-filter:hover{background-color:var(--primary-hover)}.btn-filter svg{width:18px;height:18px}.task-history-error{background-color:#fef2f2;border:1px solid #dc2626;color:#dc2626;padding:var(--spacing-md);border-radius:var(--border-radius);margin-bottom:var(--spacing-lg)}.task-history-loading{text-align:center;padding:var(--spacing-xxl);color:var(--text-secondary);font-size:1.1rem}.task-history-empty{text-align:center;padding:var(--spacing-xxl);color:var(--text-secondary);font-size:1rem;background-color:var(--bg-secondary);border-radius:var(--border-radius);border:1px dashed var(--border-color)}.task-history-summary{margin-bottom:var(--spacing-md);color:var(--text-secondary);font-size:.95rem}.summary-count{font-weight:600;color:var(--text-primary)}.task-history-cards{display:flex;flex-direction:column;gap:var(--spacing-md)}.history-task-card{padding:var(--spacing-md);border-radius:var(--border-radius);border:2px solid;box-shadow:var(--shadow-sm);transition:var(--transition-base);cursor:pointer;--card-text-primary: #212529;--card-text-secondary: #6c757d}.history-task-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.history-task-header{display:flex;justify-content:space-between;align-items:flex-start;gap:var(--spacing-sm);margin-bottom:var(--spacing-sm)}.history-task-title{font-size:1rem;font-weight:600;color:var(--card-text-primary);margin:0;flex:1}.history-priority-badge{padding:2px 8px;border-radius:12px;font-size:.75rem;font-weight:500;color:#fff;text-transform:uppercase;white-space:nowrap}.history-task-description{font-size:.9rem;color:var(--card-text-secondary);margin:0 0 var(--spacing-sm) 0;line-height:1.5}.history-task-meta{display:flex;flex-wrap:wrap;gap:var(--spacing-md)}.history-task-date{display:flex;align-items:center;gap:var(--spacing-xs);font-size:.85rem;color:var(--card-text-secondary)}.history-task-date svg{width:16px;height:16px;flex-shrink:0}@media(min-width:768px){.task-history-container{padding:var(--spacing-md)}.task-history-title{font-size:1.75rem}.task-history-subtitle{font-size:1rem}.task-history-filters{flex-wrap:nowrap}.filter-group{flex:0 1 auto;min-width:180px}.history-task-card{padding:var(--spacing-lg)}.history-task-title{font-size:1.1rem}}@media(min-width:1024px){.task-history-container{padding:var(--spacing-xl)}.task-history-title{font-size:2rem}.task-history-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-lg)}}@media(min-width:1400px){.task-history-cards{grid-template-columns:repeat(3,1fr)}}.layout{display:flex;min-height:100vh}.sidebar{width:260px;background:var(--bg-primary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:100;transition:transform .3s ease}.sidebar-header{padding:var(--spacing-xl);border-bottom:1px solid var(--border-color)}.sidebar-title{font-size:1.5rem;font-weight:700;color:var(--primary-color);margin:0}.sidebar-nav{flex:1;padding:var(--spacing-md);display:flex;flex-direction:column;gap:var(--spacing-xs)}.nav-link{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md) var(--spacing-lg);color:var(--text-secondary);text-decoration:none;border-radius:var(--border-radius);transition:var(--transition-base);font-weight:500}.nav-link:hover{background-color:var(--bg-secondary);color:var(--text-primary)}.nav-link.active{background-color:var(--primary-color);color:var(--text-light)}.nav-icon{width:20px;height:20px;flex-shrink:0}.sidebar-footer{padding:var(--spacing-md);border-top:1px solid var(--border-color);display:flex;flex-direction:column;gap:var(--spacing-xs)}.theme-toggle{display:flex;align-items:center;gap:var(--spacing-md);width:100%;padding:var(--spacing-md) var(--spacing-lg);background:none;border:none;color:var(--text-secondary);font-size:1rem;font-weight:500;cursor:pointer;border-radius:var(--border-radius);transition:var(--transition-base)}.theme-toggle:hover{background-color:var(--bg-secondary);color:var(--text-primary)}.logout-button{display:flex;align-items:center;gap:var(--spacing-md);width:100%;padding:var(--spacing-md) var(--spacing-lg);background:none;border:none;color:var(--text-secondary);font-size:1rem;font-weight:500;cursor:pointer;border-radius:var(--border-radius);transition:var(--transition-base)}.logout-button:hover{background-color:#dc26261a;color:#dc2626}[data-theme=dark] .logout-button:hover{background-color:#dc262633;color:#f87171}.main-content{flex:1;margin-left:260px;padding:var(--spacing-xl);background-color:var(--bg-secondary);min-height:100vh}.mobile-header{display:none;position:fixed;top:0;left:0;right:0;height:60px;background:var(--bg-primary);border-bottom:1px solid var(--border-color);padding:0 var(--spacing-md);align-items:center;gap:var(--spacing-md);z-index:90}.mobile-title{font-size:1.25rem;font-weight:700;color:var(--primary-color);margin:0}.menu-toggle{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:none;border:none;cursor:pointer;padding:0}.hamburger{position:relative;width:24px;height:2px;background-color:var(--text-primary);transition:var(--transition-base)}.hamburger:before,.hamburger:after{content:"";position:absolute;width:24px;height:2px;background-color:var(--text-primary);transition:var(--transition-base)}.hamburger:before{top:-8px}.hamburger:after{top:8px}.hamburger.open{background-color:transparent}.hamburger.open:before{top:0;transform:rotate(45deg)}.hamburger.open:after{top:0;transform:rotate(-45deg)}.overlay{display:none;position:fixed;inset:0;background-color:#00000080;z-index:95}@media(max-width:768px){.mobile-header{display:flex}.sidebar{transform:translate(-100%);width:280px}.sidebar.open{transform:translate(0)}.sidebar-header{padding-top:calc(var(--spacing-xl) + 60px)}.main-content{margin-left:0;padding-top:calc(60px + var(--spacing-xl))}.overlay{display:block}}@media(min-width:769px)and (max-width:1024px){.sidebar{width:220px}.main-content{margin-left:220px}}#root{min-height:100vh;width:100%}