:root{--bg-page: #f0f4f8;--bg-header: #2563eb;--bg-input: #ffffff;--bg-task: #ffffff;--bg-task-hover: #e0e7ff;--bg-task-completed: #d1fae5;--bg-history: #eef2ff;--text-primary: #1e293b;--text-muted: #64748b;--text-inverse: #ffffff;--border: #cbd5e1;--accent-primary: #4f46e5;--accent-primary-hover: #4338ca;--accent-secondary: #22d3ee;--accent-secondary-hover: #06b6d4;--danger: #ef4444;--danger-hover: #dc2626;--success: #22c55e;--info: #3b82f6;--shadow: 0 8px 20px rgba(31, 41, 55, .1);--transition: .35s cubic-bezier(.4, 0, .2, 1)}body.dark{--bg-page: #111827;--bg-header: #1e293b;--bg-input: #1f2937;--bg-task: #1f2937;--bg-task-hover: #374151;--bg-task-completed: rgba(34, 197, 94, .2);--bg-history: #1e293b;--text-primary: #e0e7ff;--text-muted: #94a3b8;--text-inverse: #ffffff;--border: #374151;--accent-primary: #818cf8;--accent-primary-hover: #6366f1;--accent-secondary: #22d3ee;--accent-secondary-hover: #06b6d4;--danger: #f87171;--danger-hover: #ef4444;--success: #4ade80;--info: #60a5fa;--shadow: 0 8px 20px rgba(0, 0, 0, .4)}body{margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:var(--bg-page);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*,*:before,*:after{box-sizing:border-box;transition:all var(--transition)}header{background:var(--bg-header);padding:1.5rem 2rem;box-shadow:var(--shadow);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:1000}header h1{margin:0;font-size:2.5rem;color:var(--text-inverse);font-weight:700;cursor:pointer;-webkit-user-select:none;user-select:none;letter-spacing:.05em;text-shadow:0 2px 6px rgba(0,0,0,.3)}header h1 span{color:var(--accent-primary);text-shadow:0 0 8px var(--accent-primary);transition:text-shadow .4s ease}header h1:hover span{text-shadow:0 0 15px var(--accent-primary-hover)}header p{font-style:italic;color:var(--text-inverse);opacity:.85;font-weight:500;margin:0;-webkit-user-select:none;user-select:none}.App{padding:3rem 2rem;text-align:center;max-width:900px;margin:0 auto}.task-form,#btns{display:flex;flex-wrap:wrap;gap:15px;justify-content:center;margin-bottom:2rem}input,select,button{padding:.85rem 1.25rem;border-radius:12px;border:1.5px solid var(--border);background:var(--bg-input);color:var(--text-primary);font-size:1.1rem;font-weight:500;outline:none;box-shadow:inset 0 1px 3px #0000000d;transition:background-color var(--transition),border-color var(--transition),color var(--transition),transform .15s ease}input::placeholder{color:var(--text-muted)}input:focus,select:focus{border-color:var(--accent-primary);box-shadow:0 0 10px var(--accent-primary)}button{background:var(--accent-secondary);color:var(--text-inverse);border:none;cursor:pointer;font-weight:700;text-transform:uppercase;letter-spacing:.05em;box-shadow:0 4px 12px #22d3ee80;-webkit-user-select:none;user-select:none}button:hover{background:var(--accent-secondary-hover);transform:scale(1.05);box-shadow:0 6px 20px #16b6c8b3}button:active{transform:scale(.97);box-shadow:0 3px 8px #16b6c880}#inp{margin:1.5rem auto;display:flex;width:50%;border-radius:9999px;border:1.5px solid var(--border);background:var(--bg-input);box-shadow:inset 0 3px 6px #0000001a;overflow:hidden;transition:box-shadow var(--transition)}#inp:hover{box-shadow:inset 0 3px 10px var(--accent-primary)}#inp input{flex:1;border:none;background:transparent;padding:1rem 1.5rem;font-size:1.1rem;font-weight:500;color:var(--text-primary);-webkit-user-select:text;user-select:text;caret-color:var(--accent-primary)}#inp button{background:var(--accent-primary);color:var(--text-inverse);padding:0 1.8rem;font-weight:700;letter-spacing:.05em;transition:background-color .3s ease}#inp button:hover{background:var(--accent-primary-hover);transform:scale(1.1);box-shadow:0 4px 12px var(--accent-primary-hover)}#inp button:active{transform:scale(.95);box-shadow:none}.task-list{list-style:none;padding:0;margin:0 auto;max-width:600px}.task-list li{display:flex;justify-content:space-between;align-items:center;padding:1.1rem 1.5rem;margin-bottom:12px;border-radius:16px;background:var(--bg-task);box-shadow:var(--shadow);font-weight:600;color:var(--text-primary);cursor:pointer;transition:background-color var(--transition),transform var(--transition);-webkit-user-select:none;user-select:none}.task-list li:hover{background:var(--bg-task-hover);transform:scale(1.03);box-shadow:0 10px 25px #4f46e540}.task-list li.completed{background:var(--bg-task-completed);color:var(--success);text-decoration:line-through;font-weight:700;box-shadow:0 6px 18px #10b9814d}.task-text{flex-grow:1;text-align:left;font-size:1.1rem}.task-timestamp{font-size:.75rem;color:var(--text-muted);margin-left:1rem;-webkit-user-select:none;user-select:none}.icon-completed{color:var(--success);margin-right:12px;transition:transform .3s ease}.icon-completed:hover{transform:scale(1.3)}.icon-deleted{color:var(--danger);margin-right:12px;transition:transform .3s ease}.icon-deleted:hover{transform:scale(1.3)}.task-status{font-weight:700;font-size:1rem}.completed-status{color:var(--success)}.deleted-status{color:var(--danger)}.task-history{margin-top:3rem;background:var(--bg-history);padding:1.5rem 2rem;border-radius:14px;max-width:650px;margin-left:auto;margin-right:auto;box-shadow:var(--shadow);-webkit-user-select:none;user-select:none}.task-history h2{color:var(--accent-primary);margin-bottom:1rem;font-weight:700;font-size:1.6rem;letter-spacing:.05em}.task-history ul{padding:0;list-style:none}.history-item{background:var(--bg-task);padding:.75rem 1.25rem;margin-bottom:.75rem;border-radius:10px;box-shadow:var(--shadow);transition:transform var(--transition),box-shadow var(--transition);font-weight:600}.history-item:hover{transform:scale(1.03);box-shadow:0 12px 30px #4f46e54d}.history-item.completed{color:var(--success)}.history-item.deleted{color:var(--danger)}.history-item.cleared{color:var(--accent-secondary)}.progress-tracker{margin-top:2rem;max-width:600px;margin-left:auto;margin-right:auto}.progress-bar{background:var(--border);height:12px;border-radius:12px;overflow:hidden;box-shadow:inset 0 2px 6px #0000001a}.progress{height:100%;width:0;background:linear-gradient(90deg,var(--accent-primary),var(--accent-secondary));transition:width .5s ease-in-out;border-radius:12px 0 0 12px}.clear-btn{background:var(--danger);color:var(--text-inverse);padding:.85rem 1.75rem;border:none;border-radius:12px;font-weight:700;cursor:pointer;margin-top:2rem;box-shadow:0 6px 15px #ef444466;transition:background-color .3s ease,transform .3s ease}.clear-btn:hover{background:var(--danger-hover);transform:scale(1.05);box-shadow:0 8px 20px #dc262699}.clear-btn:active{transform:scale(.95);box-shadow:0 4px 10px #dc262666}@media (max-width: 768px){#inp,#btns{width:100%;flex-direction:column;align-items:center}#inp input,#inp button,#btns select{width:100%}.task-list li{flex-direction:column;align-items:flex-start}.task-timestamp{margin-left:0;margin-top:.5rem}}