.button-group {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

.tab-button {
    padding: 10px 20px;
    margin: 0 5px;
    font-weight: bold;
    cursor: pointer;
    border: none;
    background-color: #007bff;
    color: white;
    border-radius: 4px;
}

.tab-button.active {
    background-color: #0056b3;
}

.form-box {
    background-color: #f8ee8d;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 20px;
    width: 80%;
    max-width: 400px;
    margin: auto;
}

.input-fields label,
.input-fields input {
    display: block;
    width: 100%;
    margin-top: 10px;
}


/*background Pic:*/
body {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('/images/pexels-izafi-29170757.jpg'); /* 替换成你的图片路径 */
    background-size: cover; /* background pic size */
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed; /*Keep the background image fixed during page scroll */
    color: #fff; /* Ensure text is visible on a dark background  */
}

/*welcome to our website:*/
h1 {
    font-size: 36px; 
    color: #4CAF50; 
    font-family: Arial, sans-serif; 
    text-align: center;
    margin-top: 20px; /* side space */
}