.header{background-color:#fff;border-bottom:1px solid var(--border-color);padding:1rem 0}.header-content{max-width:1200px;margin:0 auto;padding:0 1rem;display:flex;justify-content:space-between;align-items:center}.logo{font-size:1.5rem;font-weight:700;color:var(--primary-color);text-decoration:none}nav{display:flex;gap:1rem}.nav-link{text-decoration:none;color:var(--text-color);padding:.5rem 1rem;border-radius:.25rem;transition:background-color .2s}.nav-link:hover{background-color:var(--background-color)}@media (max-width: 768px){.header-content{flex-direction:column;gap:1rem}nav{width:100%;justify-content:center}}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#000c;display:flex;justify-content:center;align-items:center;z-index:1000;pointer-events:auto}.modal{background:#fff;padding:20px;border-radius:8px;width:300px;text-align:center;box-shadow:0 4px 8px #0003;z-index:1100}body.modal-open{overflow:hidden;pointer-events:none}body.modal-open .modal-overlay{pointer-events:auto}.task-card{display:flex;flex-direction:column;height:100%;max-height:12rem;background-color:#fff;border-radius:.5rem;padding:1rem;box-shadow:0 1px 3px #0000001a;margin-bottom:1rem;transition:transform .2s;cursor:pointer;position:relative}.task-card:hover{transform:translateY(-2px)}.task-header{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:.5rem}.task-title{font-weight:600;color:var(--text-color);margin:0;font-size:1.1rem}.status{padding:.25rem .5rem;border-radius:1rem;font-size:.8rem;font-weight:500}.status-todo{background-color:#fef3c7;color:#92400e}.status-in_progress{background-color:#dbeafe;color:#1e40af}.status-completed{background-color:#dcfce7;color:#166534}.task-card-category{color:var(--text-color);font-size:.9rem;opacity:.8}.task-actions{display:flex;justify-content:end;gap:.5rem;margin-top:auto;position:absolute;bottom:1rem;right:1rem}.task-actions .btn{width:2rem;height:2rem;display:flex;align-items:center;justify-content:center;padding:0}.modal{background:#fff;padding:20px;border-radius:8px;width:300px;text-align:center;box-shadow:0 4px 8px #0003}.modal p{margin-bottom:20px;font-size:16px}.modal-actions{display:flex;justify-content:center;gap:10px}.modal-actions .btn{padding:10px 20px;border:none;border-radius:4px;cursor:pointer}.modal-actions .btn-secondary{background-color:#f0f0f0;color:#333}.modal-actions .btn-secondary:hover{background-color:#e0e0e0}.modal-actions .btn-danger{background-color:#e74c3c;color:#fff}.modal-actions .btn-danger:hover{background-color:#c0392b}.loading-container{display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:200px;padding:2rem}.loading-spinner{display:flex;justify-content:center;align-items:center;margin-bottom:1rem}.spinner{width:40px;height:40px;border:4px solid var(--border-color);border-top:4px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}.loading-text{color:var(--text-color);font-size:1rem;font-weight:500}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.task-list{max-width:1200px;margin:0 auto;padding:1rem}.filters{display:flex;gap:1rem;margin-bottom:2rem;flex-wrap:wrap;align-items:center}.search-input,.filter-select{padding:.5rem;border:1px solid var(--border-color);border-radius:.25rem;font-size:1rem}.search-input{flex:1;min-width:200px}.filter-select{min-width:150px}.sort-buttons{display:flex;gap:.5rem;margin-left:auto}.sort-buttons .btn{padding:.5rem 1rem;white-space:nowrap}.sort-buttons .btn.active{background-color:var(--secondary-color);color:#fff}.tasks-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1rem}.task-card{display:flex;flex-direction:column;height:100%;background-color:#fff;border-radius:.5rem;padding:1rem;box-shadow:0 1px 3px #0000001a}.task-content{flex:1;display:flex;flex-direction:column;gap:.5rem;margin-bottom:1rem}.task-header{margin-bottom:.5rem}.task-title{font-weight:600;color:var(--text-color);margin:0}.task-description,.task-deadline{color:var(--text-color);font-size:.9rem;margin:0}.no-tasks{grid-column:1 / -1;text-align:center;padding:2rem;background-color:#fff;border-radius:.5rem;color:#64748b}@media (max-width: 768px){.filters{flex-direction:column;align-items:stretch}.sort-buttons{margin-left:0;flex-direction:column}.search-input,.filter-select{width:100%}}.task-form-container{max-width:600px;margin:0 auto;padding:2rem;background-color:#fff;border-radius:.5rem;box-shadow:0 1px 3px #0000001a}.task-form-container h2{margin-bottom:2rem;color:var(--text-color);text-align:center}.task-form{display:flex;flex-direction:column;gap:1rem}.checkbox-label{display:flex;align-items:center;gap:10px;cursor:pointer}.checkbox-label input[type=checkbox]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:20px;height:20px;border:2px solid #ccc;border-radius:4px;background-color:#fff;cursor:pointer;transition:all .3s ease}.checkbox-label input[type=checkbox]:checked{background-color:#007bff;border-color:#007bff;position:relative}.checkbox-label input[type=checkbox]:checked:after{content:"✔";color:#fff;font-size:14px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.checkbox-label input[type=checkbox]:hover{border-color:#007bff}.form-actions{display:flex;justify-content:flex-end;gap:1rem;margin-top:2rem}.form-group{margin-bottom:1.5rem}.form-group label{display:flex;align-items:center;margin-bottom:.5rem;color:var(--text-primary);font-weight:500}.form-group input,.form-group textarea,.form-group select{width:100%;padding:.75rem;border:2px solid var(--border-color);border-radius:.5rem;font-size:1rem;background-color:#fff;color:var(--text-primary);transition:all .2s}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #0079bf1a}.form-group textarea{min-height:120px;resize:vertical}.form-actions button{flex:1;padding:.75rem;border:none;border-radius:.5rem;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s}.submit-btn{background-color:var(--primary-color);color:#fff}.submit-btn:hover{background-color:var(--secondary-color)}.cancel-btn{background-color:#fff;border:2px solid var(--border-color);color:var(--text-secondary)}.cancel-btn:hover{background-color:var(--background-color);border-color:var(--text-secondary)}.task-form-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px}.task-form-header h2{flex:1;text-align:center;margin-right:50px;margin-bottom:0}.back-button{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background-color:#f0f0f0;border:1px solid #dcdcdc;border-radius:8px;cursor:pointer;box-shadow:0 2px 4px #0000001a;margin-right:10px;transition:background-color .2s ease,transform .2s ease}.back-button:hover{background-color:#e0e0e0}.back-button:active{transform:scale(.95)}.back-button svg{color:#333}@media (max-width: 768px){.task-form-container{margin:1rem;padding:1.5rem}.form-actions{flex-direction:column}.form-actions button{width:100%}}:root{--primary-color: #2563eb;--secondary-color: #1e40af;--background-color: #f8fafc;--text-color: #1e293b;--error-color: #dc2626;--success-color: #16a34a;--border-color: #e2e8f0}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.5}.app{max-width:1200px;margin:0 auto;padding:1rem}main{padding:2rem 0}.btn{display:inline-block;padding:.5rem 1rem;border:none;border-radius:.25rem;background-color:var(--primary-color);color:#fff;cursor:pointer;font-size:1rem;transition:background-color .2s}.btn:hover{background-color:var(--secondary-color)}.btn-secondary{background-color:transparent;border:1px solid var(--primary-color);color:var(--primary-color)}.btn-secondary:hover{background-color:var(--primary-color);color:#fff}.btn-danger{background-color:var(--error-color)}.btn-danger:hover{background-color:#b91c1c}.form-group{margin-bottom:1rem}.form-group input,.form-group textarea,.form-group select{width:100%;padding:.5rem;border:1px solid var(--border-color);border-radius:.25rem;font-size:1rem;color:var(--text-color);transition:border-color .2s}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary-color)}.error{color:var(--error-color);font-size:.875rem;margin-top:.25rem}.success{color:var(--success-color);font-size:.875rem;margin-top:.25rem}.loading{display:flex;justify-content:center;align-items:center;min-height:200px}.card{background-color:#fff;border-radius:.5rem;padding:1rem;box-shadow:0 1px 3px #0000001a;margin-bottom:1rem;transition:transform .2s,box-shadow .2s}.card:hover{transform:translateY(-2px);box-shadow:0 2px 6px #00000026}.flex{display:flex}.justify-between{justify-content:space-between}.items-center{align-items:center}.gap-2{gap:.5rem}