.app{width:100%;max-width:800px}.container{background:#fff;border-radius:12px;box-shadow:0 10px 40px #0000001a;overflow:hidden}.app-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:30px;text-align:center}.app-header h1{font-size:2rem;font-weight:600}.app-main{padding:30px}.todo-form{margin-bottom:30px;display:flex;flex-direction:column;gap:15px}.form-group{display:flex;flex-direction:column}.form-input{padding:12px 16px;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;transition:border-color .3s;font-family:inherit}.form-input:focus{outline:none;border-color:#667eea}textarea.form-input{resize:vertical;min-height:80px}.btn{padding:10px 20px;border:none;border-radius:6px;font-size:.9rem;font-weight:500;cursor:pointer;transition:all .3s}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.btn-secondary{background:#6c757d;color:#fff}.btn-secondary:hover{background:#5a6268}.btn-success{background:#28a745;color:#fff}.btn-success:hover{background:#218838}.btn-danger{background:#dc3545;color:#fff}.btn-danger:hover{background:#c82333}.btn-close{background:transparent;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:0;margin-left:10px}.todo-list{display:flex;flex-direction:column;gap:15px}.todo-item{background:#f8f9fa;border-radius:8px;padding:20px;display:flex;justify-content:space-between;align-items:center;transition:all .3s}.todo-item:hover{box-shadow:0 4px 12px #0000001a}.todo-item.completed .todo-title{text-decoration:line-through;color:#6c757d}.todo-item.completed .todo-description{text-decoration:line-through;color:#adb5bd}.todo-item.editing{background:#e9ecef}.todo-content{display:flex;align-items:center;gap:15px;flex:1}.todo-checkbox{width:20px;height:20px;cursor:pointer}.todo-text{flex:1}.todo-title{font-size:1.1rem;font-weight:500;margin-bottom:5px;color:#212529}.todo-description{font-size:.9rem;color:#6c757d}.todo-actions{display:flex;gap:10px}.todo-edit-form{width:100%;display:flex;flex-direction:column;gap:10px}.empty-message,.loading-message{text-align:center;color:#6c757d;padding:40px;font-size:1.1rem}.error-message{background:#f8d7da;color:#721c24;padding:15px 20px;border-radius:8px;margin-bottom:20px;display:flex;justify-content:space-between;align-items:center;border:1px solid #f5c6cb}@media (max-width: 768px){.app-header h1{font-size:1.5rem}.app-main{padding:20px}.todo-item{flex-direction:column;align-items:flex-start;gap:15px}.todo-actions{width:100%;justify-content:flex-end}}*{margin:0;padding:0;box-sizing:border-box}body{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;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:20px}#root{display:flex;justify-content:center;align-items:flex-start;min-height:100vh}