add.css

.logo {
    height: 100px;
    width: 100px;
}

.title {
    font-size: 80px;
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
    color: white;
    text-align: center;
    margin-top: auto;
}

.header {
    margin-top: 10px;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
    height: 100px;
    background-color: black;
    box-shadow: 10px 10px 5px aqua;
}

body {
    background-color: rgb(30, 41, 41);
}

form {
    margin-left: 5%;
    font-size: 40px;
    width: 700px;
}

form div {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: aqua;
}

#file {
    font-size: 40px;
    border-style: outset;
    border-width: 8px;
    border-color: aqua;
    width: max-content;
    color: aqua;
}

input {
    font-size: 40px;
    width: 800px;
    border-style: outset;
    border-width: 8px;
    border-color: aqua;
}

#submit {
    width: fit-content;
    font-size: 30px;
}

.course {
    margin-top: 50px;
}

.title:hover {
    color: aqua;
}

#warning {
    font-size: 40px;
    color: black;
}