style.css

body {
    background-color: black;
    height: 90dvh;
    width: 90vw;
    display: flex;
    justify-content: center;
    text-align: center;
    margin: auto;
}
#main {
    height: auto;
    width: 40vw;
    background-color: white;
    border-radius: 10px;
    margin: auto;
    text-align: center;
    padding-top: 30px;
}
h {
    font-weight: bolder;
    font-size: larger;
    font-family:'Courier New', Courier, monospace;
}

input {
    margin-top: 20px;
    height: 40px;
    width: 30vw;
    text-align: center;
    border-radius: 10px;
    border: 1px solid black;
    border-style:solid;
    font-family:'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    font-size: large;   
}

input:focus {
    border-color: rgb(0, 0, 0);
    outline: none;
}
button {
    margin-top: 20px;
    margin-bottom: 20px;
    height: 40px;
    width: 130px;
    border-radius: 10px;
    border: 1px solid black;
    background-color: black;
    text-align: center;
    color:white;
    font-size: large;
    font-family:'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    cursor: pointer;
}

button:hover {
    background-color: white;
    color: black;
}
span {
    font-size: small;
    margin-bottom: 20px;
    font-family: monospace;
    font-weight: 900;
    display: none;
}

#image {
    text-align: center;
    margin: auto;
    width: max-content;
    display: none;
}

@media screen and (max-width: 600px) {
    #main{
        width: 89vw;
    }
    input {
        width: 69vw;
    }
}