.app-container{min-height:100vh;background:linear-gradient(135deg,#ff9500,#ff6b35);display:flex;justify-content:center;align-items:center;padding:20px;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.todo-app{background:#fff;border-radius:12px;box-shadow:0 10px 40px #0003;padding:40px;width:100%;max-width:500px}.todo-app h1{text-align:center;color:#333;margin:0 0 30px;font-size:28px}.input-container{display:flex;gap:10px;margin-bottom:20px}.todo-input{flex:1;padding:12px 15px;border:2px solid #e0e0e0;border-radius:8px;font-size:16px;transition:border-color .3s}.todo-input:focus{outline:none;border-color:#ff9500}.add-button{padding:12px 25px;background:#ff9500;color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:background .3s}.add-button:hover{background:#ff7f00}.filter-container{display:flex;align-items:center;gap:10px;margin-bottom:20px;padding:12px;background:#f5f5f5;border-radius:8px}.filter-container label{font-size:14px;font-weight:600;color:#555;white-space:nowrap}.date-filter{flex:1;padding:8px 12px;border:2px solid #e0e0e0;border-radius:6px;font-size:14px;cursor:pointer;transition:border-color .3s}.date-filter:focus{outline:none;border-color:#ff9500}.todos-list{margin-bottom:20px}.empty-message{text-align:center;color:#999;padding:40px 20px;font-size:14px}.todo-item{display:flex;align-items:flex-start;gap:12px;padding:15px;background:#f9f9f9;border-radius:8px;margin-bottom:10px;border-left:4px solid #ff9500}.todo-checkbox{width:20px;height:20px;cursor:pointer;accent-color:#ff9500;margin-top:2px;flex-shrink:0}.todo-content{flex:1;display:flex;flex-direction:column;gap:4px}.todo-text{color:#333;font-size:16px;word-break:break-word}.todo-text.completed{text-decoration:line-through;color:#999}.todo-timestamp{color:#999;font-size:12px;font-style:italic}.delete-button{padding:6px 12px;background:#ff6b6b;color:#fff;border:none;border-radius:6px;font-size:12px;cursor:pointer;transition:background .3s;white-space:nowrap;flex-shrink:0}.delete-button:hover{background:#ff5252}.stats{text-align:center;padding:15px;background:#f0f0f0;border-radius:8px;color:#666;font-size:14px;font-weight:500}@media (max-width: 600px){.todo-app{padding:20px}.todo-app h1{font-size:24px}.input-container{flex-direction:column}.add-button{width:100%}.filter-container{flex-direction:column;align-items:stretch}.filter-container label{white-space:normal}.date-filter{width:100%}}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}