body {
    background-color: #0fffff;
    font-family: Arial, sans-serif;
    color: #333;
    margin: 0;
    padding: 0;
}

.header {
    text-align: center;
    padding: 20px 0;
}

.header img {
    max-width: 200px;
    height: auto;
}

form {
    margin: 20px auto;
    max-width: 600px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.txt_field {
    padding: 10px;
    width: 70%;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
}

.sub_btn {
    padding: 10px 20px;
    background-color: #333;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-left: 10px;
    font-size: 16px;
}

.sub_btn:hover {
    background-color: #555;
}

.table-responsive {
    margin: 20px auto;
    max-width: 90%;
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
}

.table th, .table td {
    padding: 12px;
    border: 1px solid #ccc;
}

.table th {
    background-color: #333;
    color: white;
}

.table tr:nth-of-type(odd) {
    background-color: #eee;
}

.table tr:hover {
    background-color: #f5f5f5;
}

.img-circle, .img-thumbnail {
    border-radius: 50%;
    max-width: 150px;
    height: auto;
    margin: 10px auto;
    display: block;
}

.btn-info {
    background-color: #17a2b8;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
}

.btn-info:hover {
    background-color: #138496;
}

.well {
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

fieldset {
    border: 1px solid #ccc;
    border-radius: 8px;
    padding: 20px;
    margin: 20px auto;
    max-width: 90%;
    background-color: #fff;
}

fieldset a {
    color: #007bff;
    text-decoration: none;
}

fieldset a:hover {
    text-decoration: underline;
}

.foot {
    text-align: center;
    padding: 20px;
    background-color: #333;
    color: white;
}

.foot a {
    color: #fff;
    margin: 0 10px;
    text-decoration: none;
}

.foot a:hover {
    text-decoration: underline;
}

@media only screen and (max-width: 760px) {
    .txt_field {
        width: 100%;
    }
    
    .sub_btn {
        width: 100%;
        margin: 10px 0 0 0;
    }
    
    .table-responsive {
        max-width: 100%;
    }
    
    .img-circle, .img-thumbnail {
        max-width: 100px;
    }
}