:root{--color-bg: #f8fafc;--color-primary: #3b82f6;--color-primary-hover: #2563eb;--color-accent: #e2e8f0;--color-text: #1e293b;--color-completed: #94a3b8;--radius: .75rem;--shadow: 0 2px 6px rgba(0, 0, 0, .08)}*{margin:0;padding:0;box-sizing:border-box}body{width:100vw;height:100vh;font-family:Inter,system-ui,sans-serif;background-color:var(--color-bg);color:var(--color-text);overflow-y:auto;overflow-x:hidden}#root{display:flex;align-items:center;justify-content:center;padding:1rem}#app{width:100%;max-width:700px;background-color:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem;display:flex;flex-direction:column;gap:1rem}.add-task-container{display:flex;gap:.5rem}.add-task-container input{flex:1;padding:.6rem .75rem;border:1px solid var(--color-accent);border-radius:var(--radius);outline:none;transition:border-color .2s,box-shadow .2s}.add-task-container input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #3b82f640}.add-task-container button{background-color:var(--color-primary);color:#fff;border:none;padding:.6rem 1rem;border-radius:var(--radius);cursor:pointer;transition:background-color .2s}.add-task-container button:hover{background-color:var(--color-primary-hover)}.tasks-container{display:flex;flex-direction:column;gap:.75rem}.task{display:flex;align-items:center;background-color:var(--color-accent);border-radius:var(--radius);padding:.5rem .75rem;box-shadow:var(--shadow);gap:.5rem}.task input[type=checkbox]{transform:scale(1.3)}.task-content.completed{text-decoration:line-through;color:var(--color-completed)}.task-content{flex:1;padding:.4rem .6rem;border:1px solid transparent;background:transparent;font-size:1rem;border-radius:var(--radius)}.task-content:focus{border-color:var(--color-primary);outline:none;background-color:#fff;box-shadow:0 0 0 3px #3b82f640}.task-content.readonly{pointer-events:none;-webkit-user-select:none;user-select:none;background-color:transparent;border-color:transparent}.timestamp{font-size:.8rem;color:var(--color-completed)}.task button{background-color:#fff;border:1px solid var(--color-accent);border-radius:var(--radius);padding:.4rem .6rem;cursor:pointer;transition:all .2s}.task button:hover{background-color:var(--color-primary);color:#fff;border-color:var(--color-primary)}.task .timestamp{margin-right:auto}.task button{width:10%}@media (max-width: 768px){#app{padding:1rem}.add-task-container{flex-direction:column}.add-task-container button{width:100%}.task{flex-wrap:wrap;flex-direction:column;align-items:flex-start;gap:.5rem}.task label{width:100%}.task input[type=checkbox]{display:none}.task-content{width:100%;text-align:center}.timestamp{width:100%;order:3;font-size:.75rem}.task button{width:100%}}