:root{--font-sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--bg-primary-light:#f6f8fa;--bg-secondary-light:#fff;--bg-tertiary-light:#f0f2f5;--text-primary-light:#1f2328;--text-secondary-light:#656d76;--border-light:#d0d7de;--shadow-light:hsla(212,9%,59%,.15);--bg-primary-dark:#0d1117;--bg-secondary-dark:#161b22;--bg-tertiary-dark:#21262d;--text-primary-dark:#e6edf3;--text-secondary-dark:#7d8590;--border-dark:#30363d;--shadow-dark:rgba(0,0,0,.3);--accent-blue:#2f81f7;--accent-blue-hover:#1f6eeb;--accent-green:#238636;--accent-green-hover:#2ea043;--accent-red:#da3633;--accent-red-hover:#f85149;--accent-orange:#f5a623;--accent-purple:#8a63d2;--priority-high:var(--accent-red);--priority-medium:var(--accent-orange);--priority-low:var(--accent-green);--transition-fast:0.2s ease-in-out;--transition-smooth:0.3s ease-in-out;--border-radius:8px}body{--bg-primary:var(--bg-primary-light);--bg-secondary:var(--bg-secondary-light);--bg-tertiary:var(--bg-tertiary-light);--text-primary:var(--text-primary-light);--text-secondary:var(--text-secondary-light);--border-color:var(--border-light);--shadow-color:var(--shadow-light)}body.dark-theme{--bg-primary:var(--bg-primary-dark);--bg-secondary:var(--bg-secondary-dark);--bg-tertiary:var(--bg-tertiary-dark);--text-primary:var(--text-primary-dark);--text-secondary:var(--text-secondary-dark);--border-color:var(--border-dark);--shadow-color:var(--shadow-dark)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);display:flex;justify-content:center;align-items:flex-start;min-height:100vh;background:var(--bg-primary);color:var(--text-primary);padding:30px 15px;transition:background-color var(--transition-fast),color var(--transition-fast)}.main-content-wrapper{width:100%;max-width:800px;background:var(--bg-secondary);padding:24px;box-shadow:0 6px 24px var(--shadow-color);border-radius:12px;border:1px solid var(--border-color);transition:background-color var(--transition-fast),border-color var(--transition-fast)}.app-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}#new-column-name-input{display:none}#add-column-btn{background-color:#1f6eeb;color:#fff;padding:8px 16px;border:none;border-radius:4px;cursor:pointer;transition:background-color var(--transition-fast);font-size:1rem}#add-column-btn:hover{background-color:#1669c1}h1,h2{font-size:2rem;font-weight:600}h2{font-size:1.75rem}h3{font-size:1.1rem;margin-bottom:8px}#theme-toggle-btn,#theme-toggle-btn-kanban{background:none;border:1px solid var(--border-color);border-radius:50%;width:40px;height:40px;font-size:1.2rem;cursor:pointer;display:flex;justify-content:center;align-items:center;transition:all var(--transition-fast)}#theme-toggle-btn-kanban:hover,#theme-toggle-btn:hover{background-color:var(--bg-tertiary);transform:rotate(15deg)}.form-container{display:flex;flex-direction:column;gap:12px;margin-bottom:20px}.input-group{display:flex;flex-wrap:wrap;gap:10px}input[type=date],input[type=text],select{padding:10px 14px;font-size:1rem;border:1px solid var(--border-color);border-radius:var(--border-radius);background-color:var(--bg-tertiary);color:var(--text-primary);transition:all var(--transition-fast);flex:1 1 150px}input[type=date]:focus,input[type=text]:focus,select:focus{outline:none;border-color:var(--accent-blue);box-shadow:0 0 0 3px rgba(47,129,247,.3)}::placeholder{color:var(--text-secondary);opacity:.8}button{padding:10px 18px;font-size:1rem;font-weight:500;border:none;border-radius:var(--border-radius);cursor:pointer;transition:all var(--transition-fast);color:#fff;flex-shrink:0}#add-todo-btn{background-color:var(--accent-green)}#add-todo-btn:hover:enabled{background-color:var(--accent-green-hover);transform:translateY(-2px)}#add-todo-btn:disabled{background-color:var(--text-secondary);cursor:not-allowed;opacity:.7}.controls-container{display:flex;gap:10px;margin-bottom:20px}#search-input{flex-grow:2}#sort-select{flex-grow:1}.todo-list{display:flex;flex-direction:column;gap:10px;max-height:50vh;overflow-y:auto;padding:5px;margin-top:3%}@keyframes a{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.todo-item{display:flex;flex-direction:column;border-left:5px solid transparent;border-radius:var(--border-radius);background:var(--bg-secondary);transition:all var(--transition-fast);animation:a .3s ease forwards;box-shadow:0 2px 4px var(--shadow-color)}.todo-item-header{display:flex;align-items:center;gap:12px;padding:14px;cursor:pointer}.todo-item.completed .todo-text-content{text-decoration:line-through;color:var(--text-secondary)}.todo-item.priority-high{border-left-color:var(--priority-high)}.todo-item.priority-medium{border-left-color:var(--priority-medium)}.todo-item.priority-low{border-left-color:var(--priority-low)}.todo-text-content{flex:1;line-height:1.4;word-break:break-word}.todo-text-content b{font-weight:600}.todo-text-content small{display:block;font-size:.8em;color:var(--text-secondary);margin-top:4px}.todo-item input[type=checkbox]{width:18px;height:18px;cursor:pointer;accent-color:var(--accent-blue)}.delete-btn{background-color:transparent;color:var(--text-secondary);padding:5px;width:30px;height:30px;font-size:1rem}.delete-btn:hover{background-color:var(--accent-red);color:#fff}.progress-container{width:80px;height:8px;background-color:var(--border-color);border-radius:4px;margin-left:auto;margin-right:10px}.progress-bar{height:100%;background-color:var(--accent-blue);border-radius:4px;transition:width var(--transition-smooth)}.todo-details{max-height:0;overflow:hidden;transition:max-height var(--transition-smooth),padding var(--transition-smooth);padding:0 14px;background-color:var(--bg-tertiary)}.todo-item.expanded .todo-details{max-height:500px;padding:14px;border-top:1px solid var(--border-color)}.todo-details textarea{width:100%;min-height:80px;background-color:var(--bg-secondary);border:1px solid var(--border-color);box-sizing:border-box;border-radius:var(--border-radius);padding:10px;color:var(--text-primary);margin-bottom:10px;resize:vertical;font-size:1rem;line-height:1.4}.subtask-list{list-style:none;padding:0}.subtask-list li{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--border-color)}.subtask-list li:last-child{border-bottom:none}.subtask-list label{flex-grow:1;font-size:.95rem}.subtask-list .subtask-text.completed{text-decoration:line-through;color:var(--text-secondary)}.subtask-list .delete-subtask-btn{background:none;color:var(--text-secondary);padding:2px}.add-subtask-form{display:flex;gap:10px;margin-top:10px}.add-subtask-form input{flex-grow:1}.add-subtask-form button{font-size:.9rem;padding:8px 12px;background-color:var(--accent-blue);color:#fff}.popup{display:none;position:fixed;z-index:1;left:0;top:0;width:100%;height:100%;justify-content:center;align-items:center;background-color:hsla(0,0%,4%,.5);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);animation:b .3s ease forwards}@keyframes b{0%{opacity:0}to{opacity:1}}.popup-content{background:var(--bg-secondary-dark);border-radius:12px;box-shadow:0 8px 32px rgba(0,0,0,.3);border:1px solid hsla(0,0%,100%,.1);width:90%;max-width:400px;padding:25px;color:var(--text-primary-dark);position:relative;animation:d .4s ease-out forwards}.close{position:absolute;top:10px;right:15px;font-size:28px;color:var(--text-secondary-dark);cursor:pointer;transition:transform var(--transition-fast),color var(--transition-fast)}.close:hover{transform:rotate(90deg);color:#fff}table{width:100%;border-collapse:collapse;margin-top:15px}td,th{padding:10px;text-align:left;border-bottom:1px solid var(--border-dark)}th{font-weight:600}#motivational-message,th{color:var(--text-secondary-dark)}#motivational-message{margin-top:20px;font-style:italic;text-align:center}#kanban-controls{display:flex;gap:10px;margin-bottom:15px}.kanban-board{display:flex;gap:15px;overflow-x:auto;padding:15px 5px;min-height:45vh}.kanban-column{background-color:var(--bg-tertiary);border-radius:var(--border-radius);padding:12px;width:280px;flex-shrink:0;border:1px solid var(--border-color);transition:background-color var(--transition-fast)}.kanban-column.drop-target-column{background-color:rgba(47,129,247,.1);border-color:var(--accent-blue)}.kanban-column h3{padding:5px;margin-bottom:10px;border-bottom:2px solid var(--border-color);font-size:1.1rem;display:flex;justify-content:space-between;align-items:center;cursor:grab;user-select:none}.kanban-column h3 span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:150px}.kanban-column.dragging-column{opacity:.5;transform:rotate(2deg)}.column-controls button{background:none;color:var(--text-secondary);padding:2px 4px;font-size:.9rem}.column-controls button:hover{color:var(--text-primary)}.kanban-cards{min-height:100px;display:flex;flex-direction:column;gap:10px}.kanban-card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-left:4px solid transparent;border-radius:5px;padding:12px;cursor:pointer;font-size:.9rem;box-shadow:0 1px 3px var(--shadow-color);transition:all var(--transition-fast)}.kanban-card:hover{transform:translateY(-2px);box-shadow:0 4px 8px var(--shadow-color)}.kanban-card.dragging{opacity:.5}.kanban-card p{margin-bottom:5px}.kanban-card small{color:var(--text-secondary)}.kanban-card.priority-high{border-left-color:var(--priority-high)}.kanban-card.priority-medium{border-left-color:var(--priority-medium)}.kanban-card.priority-low{border-left-color:var(--priority-low)}#toggle-view-btn{width:100%;margin-top:20px;background-color:var(--accent-purple)}#toggle-view-btn:hover{background-color:#724bb7}.button-group{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-top:20px;padding-top:20px;border-top:1px solid var(--border-color)}#delete-completed-btn{background-color:transparent;border:1px solid var(--accent-red);color:var(--accent-red)}#delete-completed-btn:hover{background-color:var(--accent-red);color:#fff}label{font-size:1rem;gap:8px;cursor:pointer}.modal-backdrop,label{display:flex;align-items:center}.modal-backdrop{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.6);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);z-index:2;justify-content:center;opacity:0;animation:c .3s forwards}@keyframes c{to{opacity:1}}.modal-dialog{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:12px;box-shadow:0 8px 32px var(--shadow-color);width:90%;max-width:450px;padding:24px;animation:d .4s ease-out forwards}.modal-dialog.modal-lg{max-width:600px}@keyframes d{0%{transform:translateY(-20px) scale(.95);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}.modal-dialog h2{font-size:1.5rem;margin-bottom:15px}.modal-dialog h3{font-size:1.1rem;margin-top:20px;margin-bottom:10px;border-bottom:1px solid var(--border-color);padding-bottom:5px}.modal-dialog .modal-form,.modal-dialog p{margin-bottom:20px;color:var(--text-secondary);line-height:1.6}.modal-dialog .modal-form .form-group{margin-bottom:15px}.modal-dialog .modal-form label{display:block;margin-bottom:5px;font-weight:500}.modal-dialog .modal-form input,.modal-dialog .modal-form select,.modal-dialog .modal-form textarea{width:100%}.modal-dialog .modal-form textarea{min-height:80px;background-color:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--border-radius);padding:10px;color:var(--text-primary)}.modal-buttons{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}#subtask-list{list-style:none;padding:0;max-height:150px;overflow-y:auto}#subtask-list li{display:flex;align-items:center;gap:10px;padding:8px 5px;border-bottom:1px solid var(--border-color)}#subtask-list li:last-child{border-bottom:none}#subtask-list input[type=checkbox]{width:16px;height:16px}#subtask-list label{flex-grow:1}#subtask-list .subtask-text.completed{text-decoration:line-through;color:var(--text-secondary)}#subtask-list .delete-subtask-btn{background:none;color:var(--text-secondary);padding:2px;font-size:.9em}#subtask-list .delete-subtask-btn:hover{color:var(--accent-red)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}@media (max-width:768px){.main-content-wrapper,body{padding:15px}h1{font-size:1.75rem}.button-group,.controls-container{flex-direction:column;align-items:stretch}}@media (max-width:480px){.input-group{flex-direction:column;align-items:stretch}.input-group>*{flex:1 1 auto}#kanban-board{flex-direction:column;gap:20px}.kanban-column{width:100%}.form-container input,.form-container select{padding:8px 12px;font-size:.95rem}.form-container button{padding:10px 12px;font-size:.95rem}input[type=date],input[type=text],select{flex:1 1 50px}}