body {
font-family: Arial, sans-serif;
background-color: #f3f3f3;
}
.container {
max-width: 400px;
margin: 0 auto;
padding: 20px;
background-color: #fff;
border-radius: 5px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
input[type="number"] {
width: calc(100% - 70px);
padding: 10px;
margin-bottom: 10px;
box-sizing: border-box;
}
select {
width: 70px;
padding: 10px;
margin-bottom: 10px;
box-sizing: border-box;
}
button {
width: 100%;
padding: 10px;
background-color: #007bff;
color: #fff;
border: none;
border-radius: 5px;
cursor: pointer;
...
