styles.css

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 1.05rem;
    font-family: 'Segoe UI';
    margin: 0 auto;
    padding: 5px;
    background-image: url(background.svg);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}
* {
    padding:  6px;
    margin: 0px 0px 10px 0px;
}
#form, #table {
    margin-block-start: 0.5%;;
    margin-block-end: 80px;
    width: 65%;
   
}
fieldset {
    border-radius: 6px;
    border-color: black;

}
#main-legend {
    font-size: 1.5rem;
    text-transform: uppercase;
    color: #505fff
}
h2 {
    font-size: 1.5rem;
    text-transform: uppercase;
    color: #505fff 
}
legend {
    font-size: 1.2rem;
    font-weight: 700;
    color: #ff4f72;
}
#table {
    border: 2px solid black
}
#table tr th:not(:nth-child(5)) {
    border-right: 2px solid black
}
#table tr td:not(:nth-child(5)) {
    border-right: 2px solid black
}
#table tbody {
    text-align: center;
}
label {
    color: #000000
}
#submit {
    font-size: 16px;
    cursor: pointer;
    --hover-shadows: 8px 8px 22px #121212,
                      -8px -8px 22px #303030;
    --accent: fuchsia;
    font-weight: bold;
    letter-spacing: 0.1em;
    border: none;
    border-radius: 1.1em;
    background-color: #212121;
    color: white;
    padding: 1em 1.5em;
    transition: box-shadow ease-in-out 0.3s,
                background-color ease-in-out 0.1s,
                letter-spacing ease-in-out 0.1s,
                transform ease-in-out 0.1s;
    --box-shadow: 7px 7px 6px #1c1c1c,
                -7px -7px 6px #262626;
   }
   
   #submit:hover {
    box-shadow: var(--hover-shadows);
   }
   
   #submit:active {
    box-shadow: var(--hover-shadows),
                 var(--accent) 0px 0px 30px 5px;
    background-color: var(--accent);
    transform: scale(0.95);
   }