:root{--primary-color: #646cff;--hover-color: #535bf2;--bg-color: #242424;--text-color: rgba(255, 255, 255, .87);--card-bg: #1a1a1a;--sidebar-bg: #1a1a1a;--border-color: #333;--hover-bg: #2a2a2a;--priority-high: #ef4444;--priority-medium: #f59e0b;--priority-low: #10b981;--delete-color: #dc2626;--edit-color: #06b6d4}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color:var(--text-color);background-color:var(--bg-color);min-height:100vh}#app{display:flex;min-height:100vh}.sidebar{width:250px;background-color:var(--sidebar-bg);padding:1.5rem;border-right:1px solid var(--border-color)}.user-info{display:flex;align-items:center;gap:1rem;margin-bottom:2rem}.avatar{width:40px;height:40px;border-radius:50%;background-color:var(--primary-color);overflow:hidden}.avatar 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ease;display:flex;align-items:center;gap:.5rem;border:none;outline:none}.todo-edit-btn{background-color:var(--edit-color);color:#fff}.todo-edit-btn:hover:not(:disabled){background-color:#0891b2;transform:translateY(-1px)}.todo-edit-btn:disabled{background-color:#64748b;cursor:not-allowed;opacity:.7}.todo-action-btn{background-color:var(--delete-color);color:#fff}.todo-action-btn:hover{background-color:#b91c1c;transform:translateY(-1px)}.todo-permanent-delete-btn{background-color:var(--delete-color);color:#fff;padding:.5rem 1rem;border-radius:6px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease;border:none;outline:none}.todo-permanent-delete-btn:hover{background-color:#b91c1c;transform:translateY(-1px)}.todo-restore-btn{background-color:var(--edit-color);color:#fff;padding:.5rem 1rem;border-radius:6px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease;border:none;outline:none}.todo-restore-btn:hover{background-color:#0891b2;transform:translateY(-1px)}@media (max-width: 768px){#app{overflow:hidden;flex-direction:column}.sidebar{width:100%;border-right:none;border-bottom:1px solid var(--border-color)}.toolbar{flex-direction:column}.toolbar-actions{width:100%;flex-direction:column;align-items:stretch;gap:.5rem}.task-dialog{width:90%;max-width:400px;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%)}.todo-form{min-width:auto}.user-info{display:none}.todo-item{flex-direction:column;gap:1rem}.todo-actions{width:100%;margin-left:0;margin-top:1rem;justify-content:flex-end}.todo-edit-btn,.todo-action-btn{min-width:100px;max-width:150px}.todo-content{width:100%}.todo-actions{flex-direction:column;gap:.5rem}.todo-permanent-delete-btn,.todo-restore-btn{width:100%;justify-content:center;padding:.75rem 1rem}}@media (min-width: 769px) and (max-width: 1024px){.todo-item{flex-wrap:wrap}.todo-actions{margin-top:.5rem}.todo-edit-btn,.todo-action-btn{min-width:90px}}.todo-edit-btn:active:not(:disabled),.todo-action-btn:active{transform:translateY(0)}.todo-edit-btn:focus:not(:disabled),.todo-action-btn:focus{box-shadow:0 0 0 2px #fff3}.todo-edit-btn.loading,.todo-action-btn.loading{position:relative;color:transparent}.todo-edit-btn.loading:after,.todo-action-btn.loading:after{content:"";position:absolute;width:16px;height:16px;top:50%;left:50%;margin:-8px 0 0 -8px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:button-loading .6s linear infinite}@keyframes button-loading{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:4rem 2rem;color:#666}.empty-state img{width:100px;height:100px;margin-bottom:1rem}.statistics-view{padding:2rem 0}.statistics-view.hidden{display:none}.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.stat-card{background-color:var(--card-bg);padding:1.5rem;border-radius:8px;border:1px solid var(--border-color)}.stat-value{font-size:2rem;font-weight:700;color:var(--primary-color)}.task-dialog{background-color:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;padding:2rem;color:var(--text-color)}.task-dialog::backdrop{background-color:#00000080}.todo-form{display:flex;flex-direction:column;gap:1.5rem}@media (min-width: 769px){.toolbar{flex-direction:row;justify-content:space-between;align-items:center}.toolbar-actions{flex-direction:row;width:auto}}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-weight:500}.form-row{display:flex;gap:1rem}.form-row .form-group{flex:1}textarea{width:100%;padding:.75rem 1rem;border-radius:8px;border:1px solid var(--border-color);background-color:var(--card-bg);color:var(--text-color);resize:vertical}select,input[type=text],input[type=datetime-local]{width:100%;padding:.75rem 1rem;border-radius:8px;border:1px solid var(--border-color);background-color:var(--card-bg);color:var(--text-color)}.todo-countdown{font-size:.8em;opacity:.7}.dialog{padding:2rem;border-radius:8px;border:1px solid var(--border-color);background-color:var(--card-bg);color:var(--text-color);max-width:500px;width:90%}.dialog::backdrop{background-color:#00000080}.dialog h2{margin-bottom:1.5rem;font-size:1.5rem}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem}.form-group input,.form-group textarea,.form-group select{width:100%;padding:.75rem;border-radius:8px;border:1px solid var(--border-color);background-color:var(--card-bg);color:var(--text-color)}.dialog-actions{display:flex;justify-content:flex-end;gap:1rem;margin-top:2rem}.dialog-actions button{padding:.75rem 1.5rem;border-radius:8px;cursor:pointer;transition:all .2s}.dialog-actions button[type=submit]{background-color:var(--primary-color);border:1px solid var(--primary-color);color:#fff}.dialog-actions button[type=button]{background-color:transparent;border:1px solid var(--border-color);color:var(--text-color)}.filter-dropdown{display:none}@media (max-width: 768px){.filter-dropdown{display:block;margin-bottom:1rem}.main-nav{display:none}}.alert-container{position:fixed;top:20px;right:20px;z-index:1000;display:flex;flex-direction:column;gap:10px;max-width:400px;width:90%}.alert-box{background-color:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;padding:1rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;box-shadow:0 4px 6px #0000001a;animation:slideIn .3s ease-out;transform:translate(0)}.alert-box.overdue{border-left:4px solid var(--priority-high)}.alert-box.completed{border-left:4px solid var(--priority-low)}.alert-box .alert-content{flex:1;display:flex;align-items:center;gap:.75rem}.alert-box .alert-icon{font-size:1.25rem}.alert-box .alert-message{font-size:.875rem;line-height:1.5}.alert-box .close-btn{background:none;border:none;color:var(--text-color);cursor:pointer;padding:.25rem;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:background-color .2s}.alert-box .close-btn:hover{background-color:var(--hover-bg)}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes slideOut{0%{transform:translate(0);opacity:1}to{transform:translate(100%);opacity:0}}.alert-box.hide{animation:slideOut .3s ease-in forwards}@media (max-width: 768px){.alert-container{top:10px;right:10px;left:10px;width:auto}}