body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    display: flex;
    justify-content: center;
    padding: 40px;
}
.form-container {
    background: #fff;
    padding: 20px;
    width: 100%;
    max-width: 500px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
label {
    display: block;
    margin-top: 15px;
}
input {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
}
button {
    margin-top: 20px;
    padding: 10px 15px;
}
#lang-btn {
    float: right;
    margin-bottom: 10px;
}