* {
    box-sizing: border-box;
}

#homeButton {
    position: fixed;

    top: calc(16px + env(safe-area-inset-top));
    left: max(16px, calc(50vw - 215px + 16px));

    width: 48px;
    height: 48px;

    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 50%;

    background: rgba(255,255,255,.92);
    color: #102044;

    text-decoration: none;
    font-size: 24px;
    font-weight: 900;

    box-shadow:
        0 6px 18px rgba(0,0,0,.18);

    z-index: 9999;

    -webkit-tap-highlight-color: transparent;
}

#homeButton:active {
    transform: scale(.94);
}