body {
    background-color: #f7f7f7;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.container {
    text-align: center;
}

.kotak {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    max-width: 250px;
    background-color: white;
    border-radius: 20px;
    text-align: center;
    padding: 10px;
    padding-top: 50px;
    margin-bottom: 10px;
}
.btn {
    display: inline-block;
    background-color: #007bff;
    border: 0;
    margin-top: 5px;
    margin-bottom: 20px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
    padding: 10px 20px;
    color: white;
    font-family: Verdana, Geneva, Tahoma, sans-serif
}

h1 {
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    border-radius: 20px;
    margin-right: 10px;
    margin-left: 10px;
    padding: 10px;
    font-weight: bold;
    font-size: 30px;
}

p {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 15px;
}

.logo {
    border-radius: 25px;
    width: 100px;
}

.credit {
    text-decoration: none;
    color: gray;
    opacity: 50%;
    font-size: 10px;
}