body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
}
.container {
    max-width: 600px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
.section {
    margin-bottom: 20px;
}
.loading {
    padding: 10px;
    background-color: #f8f9fa;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: center;
}
label, input, button {
    margin: 5px;
}
input {
    padding: 5px;
    width: 100px;
}
button {
    padding: 5px 10px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 3px;
    cursor: pointer;
}
button:hover {
    background-color: #0056b3;
}
.red {
    color: red;
}