:root{--bg-primary:#f5f5f5;--bg-secondary:#fff;--bg-sidebar:#fff;--bg-item-hover:#f5f5f5;--bg-item-active:#f0f0f0;--text-primary:#333;--text-secondary:#666;--text-muted:#999;--border-color:#e5e5e5;--accent-color:#3b82f6;--accent-hover:#2563eb;--task-row-border:#f0f0f0;--task-row-selected:#f0f7ff}[data-theme=dark]{--bg-primary:#121212;--bg-secondary:#1e1e1e;--bg-sidebar:#181818;--bg-item-hover:#2a2a2a;--bg-item-active:#333;--text-primary:#e0e0e0;--text-secondary:#aaa;--text-muted:#777;--border-color:#333;--accent-color:#3b82f6;--accent-hover:#60a5fa;--task-row-border:#2a2a2a;--task-row-selected:#1a2638}*{box-sizing:border-box;padding:0;margin:0}body,html{width:100%;height:100%;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--bg-primary);color:var(--text-primary);transition:background-color .3s,color .3s}a{color:inherit;text-decoration:none}.app-layout{display:flex;height:100vh;width:100vw;overflow:hidden;background:var(--bg-primary)}.sidebar{width:280px;background:var(--bg-sidebar);border-right:1px solid var(--border-color);display:flex;flex-direction:column;overflow-y:auto;flex-shrink:0;transition:transform .3s ease,width .3s ease,background-color .3s}.sidebar-closed{transform:translateX(-100%);width:0;min-width:0;border-right:none;overflow:hidden}.sidebar-header{padding:20px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-color)}.sidebar-header h2{font-size:18px;font-weight:600;color:var(--text-primary)}.menu-toggle{background:none;border:none;font-size:20px;cursor:pointer;color:var(--text-secondary);padding:4px 8px}.sidebar-search{padding:16px 20px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;gap:8px;color:var(--text-muted)}.sidebar-search input{flex:1 1;border:none;outline:none;font-size:14px;color:var(--text-primary);background:transparent}.sidebar-search input::placeholder{color:var(--text-muted)}.sidebar-section{padding:12px 0;border-bottom:1px solid var(--border-color)}.sidebar-section-title{padding:8px 20px;font-size:11px;font-weight:600;text-transform:uppercase;color:var(--text-muted);letter-spacing:.5px}.sidebar-item{display:flex;align-items:center;gap:12px;padding:10px 20px;cursor:pointer;transition:background-color .15s;font-size:14px;color:var(--text-primary)}.sidebar-item:hover{background:var(--bg-item-hover)}.sidebar-item.active{background:var(--bg-item-active);font-weight:500}.sidebar-icon{width:20px;text-align:center;font-size:16px}.sidebar-badge{margin-left:auto;background:var(--bg-item-active);padding:2px 8px;border-radius:12px;font-size:12px;font-weight:500;color:var(--text-secondary)}.sort-indicator{margin-left:auto;font-size:14px;font-weight:600;color:var(--accent-color)}.list-color{width:12px;height:12px;border-radius:2px;flex-shrink:0}.sidebar-item.add-item{color:var(--accent-color);font-weight:500}.tags-container{padding:8px 20px;display:flex;flex-wrap:wrap;gap:8px}.tag-pill{transition:all .2s;display:inline-block;padding:4px 12px;border-radius:12px;font-size:12px;font-weight:500;color:#333}[data-theme=dark] .tag-pill:not(.tag-selected){color:#121212}.tag-pill:hover{transform:translateY(-1px);box-shadow:0 2px 4px rgba(0,0,0,.1)}.tag-selected{box-shadow:0 2px 6px rgba(59,130,246,.3)}.sidebar-footer{margin-top:auto;padding:12px 0;border-top:1px solid var(--border-color)}.main-content{flex:1 1;flex-direction:column;overflow:hidden;position:relative;min-width:0;width:100%;transition:background-color .3s}.main-content,.sidebar-toggle-button{display:flex;background:var(--bg-secondary)}.sidebar-toggle-button{position:absolute;top:20px;left:20px;z-index:100;border:1px solid var(--border-color);border-radius:6px;font-size:20px;cursor:pointer;color:var(--text-secondary);padding:8px 12px;box-shadow:0 2px 4px rgba(0,0,0,.1);transition:all .2s;width:44px;height:44px;align-items:center;justify-content:center}.sidebar-toggle-button:hover{background:var(--bg-item-hover);box-shadow:0 2px 8px rgba(0,0,0,.15)}.task-list-column{height:100%;display:flex;flex-direction:column;overflow:hidden;border-right:1px solid var(--border-color)}.task-list-header{padding:24px 24px 16px;border-bottom:1px solid var(--border-color);flex-shrink:0;justify-content:space-between}.header-left,.task-list-header{display:flex;align-items:center;gap:12px;min-width:0}.header-left{flex:1 1}.sidebar-closed-layout .task-list-header{padding-left:80px}.task-list-header h1{font-size:24px;font-weight:600;color:var(--text-primary);margin:0;white-space:nowrap;overflow:visible;text-overflow:clip;flex:0 1 auto;min-width:-moz-fit-content;min-width:fit-content}.task-count{background:var(--bg-item-active);padding:4px 10px;border-radius:12px;font-size:14px;font-weight:500;color:var(--text-secondary);flex-shrink:0;white-space:nowrap}.sort-controls{display:flex;align-items:center;gap:8px;margin-left:auto;flex-shrink:0}.sort-btn{padding:6px 12px;border:1px solid var(--border-color);border-radius:4px;background:var(--bg-secondary);color:var(--text-secondary);font-size:13px;cursor:pointer;transition:all .2s;white-space:nowrap}.sort-btn:hover{border-color:var(--text-muted);color:var(--text-primary)}.sort-btn.active{border-color:var(--accent-color);background:var(--accent-color);color:#fff}.sort-btn.active:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.sort-clear-btn{padding:6px 12px;border:1px solid var(--border-color);border-radius:4px;background:var(--bg-secondary);color:var(--text-muted);font-size:13px;cursor:pointer;transition:all .2s}.sort-clear-btn:hover{border-color:var(--text-muted);color:var(--text-secondary)}.add-task-button{margin:16px 24px;padding:10px 16px;background:var(--accent-color);color:#fff;border:none;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:background-color .2s;width:-moz-fit-content;width:fit-content}.add-task-button:hover{background:var(--accent-hover)}.tasks-container{flex:1 1;overflow-y:auto;padding:0}.task-row{display:flex;align-items:center;gap:12px;padding:16px 24px;border-bottom:1px solid var(--task-row-border);cursor:pointer;transition:background-color .15s}.task-row:hover{background:var(--bg-item-hover)}.task-row.selected{background:var(--task-row-selected);border-left:3px solid var(--accent-color)}.task-checkbox{width:18px;height:18px;cursor:pointer;flex-shrink:0}.task-row-content{flex:1 1;min-width:0}.task-row-title{font-size:15px;font-weight:500;color:var(--text-primary);margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.task-row-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text-secondary);flex-wrap:wrap;min-width:0}.task-meta-item.overdue{color:#ef4444;font-weight:600}.tag-priority{background:var(--bg-item-active);color:var(--accent-color)}.task-arrow{color:var(--text-muted);font-size:18px;flex-shrink:0}.task-details-panel{width:400px;background:var(--bg-secondary);border-left:1px solid var(--border-color);display:flex;flex-direction:column;overflow:hidden;flex-shrink:0;transition:background-color .3s}.task-details-panel.empty{align-items:center;justify-content:center;padding:40px;background:var(--bg-primary)}.empty-panel-message{text-align:center;color:var(--text-muted)}.empty-panel-message p{margin-bottom:20px;font-size:16px}.btn-create-task{padding:10px 20px;background:var(--accent-color);color:#fff;border:none;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;transition:background-color .2s}.btn-create-task:hover{background:var(--accent-hover)}.panel-header h3{color:var(--text-primary)}.new-tag-input,.panel-field input[type=date],.panel-field select,.panel-field textarea,.subtask-input{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-primary)}.new-tag-input:focus,.panel-field input[type=date]:focus,.panel-field select:focus,.panel-field textarea:focus,.subtask-input:focus{border-color:var(--accent-color)}.tag-select-btn:hover{background:var(--task-row-selected)}.subtask-delete-btn{background:#fee2e2;color:#dc2626}[data-theme=dark] .subtask-delete-btn{background:#451a1a;color:#f87171}.btn-cancel{background:#6b7280}.modal{background:var(--bg-secondary);color:var(--text-primary)}.modal-actions,.modal-header{border-color:var(--border-color)}.modal-header h2{color:var(--text-primary)}.modal-input{border:1px solid var(--border-color)}.modal-input,.toast{background:var(--bg-secondary);color:var(--text-primary)}.toast{border-left-width:4px}.toast-message{color:var(--text-primary)}.theme-toggle-btn{background:none;border:1px solid var(--border-color);border-radius:50%;width:32px;height:32px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:16px;color:var(--text-secondary);transition:all .2s}.theme-toggle-btn:hover{background:var(--bg-item-hover);color:var(--text-primary)}.loading{height:100%;font-size:16px}.empty-task-list,.loading{display:flex;align-items:center;justify-content:center;color:var(--text-muted)}.empty-task-list{height:200px;padding:40px;text-align:center;font-size:15px}.panel-header{padding:20px 24px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.panel-header h3{margin:0;font-size:18px;font-weight:600}.close-panel{background:none;border:none;font-size:24px;cursor:pointer;padding:4px 8px;border-radius:4px;display:flex;align-items:center;justify-content:center;color:var(--text-muted)}.close-panel:hover{background:var(--bg-item-hover);color:var(--text-primary)}.panel-content{flex:1 1;padding:24px;overflow-y:auto;gap:20px}.panel-content,.panel-field{display:flex;flex-direction:column}.panel-field{gap:8px}.panel-field label{font-size:12px;font-weight:600;text-transform:uppercase;color:var(--text-secondary);letter-spacing:.5px}.section-label{margin-top:8px}.task-title-input{width:100%;font-size:20px;font-weight:600;border:none;border-bottom:2px solid var(--border-color);padding:8px 0;outline:none;background:transparent;color:var(--text-primary);transition:border-color .2s}.task-title-input:focus{border-bottom-color:var(--accent-color)}.panel-field textarea{min-height:100px;padding:12px;resize:vertical}.panel-field input[type=date],.panel-field select,.panel-field textarea{width:100%;border-radius:6px;font-size:14px;border:1px solid var(--border-color);background:var(--bg-secondary);color:var(--text-primary);outline:none}.panel-field input[type=date],.panel-field select{padding:10px 12px;cursor:pointer}.tags-display{display:flex;flex-direction:column;gap:12px}.tags-selection-container{display:flex;flex-wrap:wrap;gap:8px}.tag-select-btn{padding:6px 12px;border-radius:16px;font-size:13px;border:1px solid var(--border-color);background:var(--bg-secondary);color:var(--text-secondary);cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:4px}.tag-select-btn:hover{border-color:var(--accent-color);color:var(--accent-color)}.tag-select-btn.selected{background:var(--accent-color);border-color:var(--accent-color);color:#fff}.tag-check{font-size:10px}.show-less-tags,.show-more-tags{background:var(--bg-item-active);border-style:dashed}.add-tag-input-group{display:flex;gap:8px;margin-top:4px}.new-tag-input{flex:1 1;padding:8px 12px;border-radius:6px;background:var(--bg-secondary);outline:none}.add-tag-btn,.new-tag-input{font-size:13px;border:1px solid var(--border-color);color:var(--text-primary)}.add-tag-btn{padding:8px 16px;background:var(--bg-item-active);border-radius:6px;font-weight:500;cursor:pointer}.add-tag-btn:hover{background:var(--bg-item-hover)}.subtasks-list{display:flex;flex-direction:column;gap:8px}.subtask-item{display:flex;align-items:center;gap:10px;padding:8px 12px;background:var(--bg-item-hover);border-radius:6px;border:1px solid transparent}.subtask-item:focus-within{border-color:var(--accent-color);background:var(--bg-secondary)}.subtask-input{flex:1 1;border:none;background:transparent;font-size:14px;color:var(--text-primary);outline:none}.subtask-delete-btn{background:transparent;border:none;color:var(--text-muted);font-size:18px;cursor:pointer;padding:0 4px;line-height:1}.subtask-delete-btn:hover{color:#ef4444}.add-subtask-btn{margin-top:8px;padding:8px 12px;background:transparent;border:1px dashed var(--border-color);border-radius:6px;color:var(--text-secondary);font-size:13px;cursor:pointer;display:flex;align-items:center;gap:8px;width:-moz-fit-content;width:fit-content}.add-subtask-btn:hover{background:var(--bg-item-hover);color:var(--text-primary);border-color:var(--text-muted)}.add-subtask-btn span{font-size:18px}.panel-actions{padding:24px;border-top:1px solid var(--border-color);display:flex;flex-wrap:wrap;gap:12px;background:var(--bg-secondary)}.btn-save{flex:2 1;min-width:120px;padding:12px 20px;background:var(--accent-color);color:#fff;border:none;border-radius:6px;font-weight:600;cursor:pointer}.btn-save:disabled{opacity:.6;cursor:not-allowed}.btn-delete{flex:1 1;min-width:100px;padding:12px 20px;background:#fee2e2;color:#dc2626;border:1px solid #fecaca;border-radius:6px;font-weight:500;cursor:pointer}.btn-delete:hover{background:#fecaca}.btn-cancel{flex:1 1;min-width:80px;padding:12px 20px;background:var(--bg-item-active);color:var(--text-primary);border:1px solid var(--border-color);border-radius:6px;font-weight:500;cursor:pointer}.btn-cancel:hover{background:var(--bg-item-hover)}.task-tags-display{display:flex;gap:4px;flex-wrap:wrap}.task-tag-item{background:var(--bg-item-active);padding:2px 8px;border-radius:10px;font-size:11px;color:var(--text-secondary)}.task-tag-item.more-tags{background:var(--accent-color);color:#fff}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000}.modal{width:400px;max-width:90%;border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.3)}.modal-header{padding:20px 24px;border-bottom:1px solid var(--border-color)}.modal-header h2{margin:0;font-size:18px;font-weight:600}.modal-body{padding:24px}.modal-input{width:100%;padding:12px;border-radius:6px;font-size:14px;outline:none}.modal-actions{padding:16px 24px;border-top:1px solid var(--border-color);display:flex;justify-content:flex-end;gap:12px}.toast-container{position:fixed;bottom:24px;right:24px;z-index:2000;display:flex;flex-direction:column;gap:8px}.toast{padding:12px 16px;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,.15);display:flex;align-items:center;gap:12px;animation:slideIn .3s ease;border-left-style:solid}@keyframes slideIn{0%{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}.toast.success{border-left-color:#22c55e}.toast.error{border-left-color:#ef4444}.toast.info{border-left-color:#3b82f6}.toast-icon{font-size:18px}.toast-message{font-size:14px}