body {
    font-family: Arial;
    margin: 0;
    padding: 0;
    text-align: center;
    transition: 0.5s;
}

header {
    background: black;
    color: white;
    padding: 20px;
}

.student-info {
    background: #f4f4f4;
    padding: 10px;
    margin: 10px;
}

button {
    padding: 10px;
    margin: 10px;
    cursor: pointer;
}