main {
    width: 100%;
    height: calc(210 / 480 * 100%);
}

.main_div {
    z-index: 10;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: end;
    width: 100%;
    height: 100%;
}

a {
    font-size: 20px;
    color: black;
}

a:hover {
    cursor: pointer;
    color: rgb(255, 0, 0);
}

.main_div button,
.main_div h2,
.main_div a,
.main_div span {
    margin-right: calc(50 / 920 * 100%);
}