#announcementPopup {
    border: 0;
    padding: 0;
    margin: auto;
    background: transparent;
    overflow: visible;
    max-width: calc(100vw - 32px);
    max-height: calc(100dvh - 48px);
    box-shadow: 0 12px 50px #0006;
}
#announcementPopup::backdrop { background: rgb(0 0 0 / 70%); }
#announcementPopup img {
    display: block;
    width: auto;
    height: auto;
    max-width: min(680px, calc(100vw - 32px));
    max-height: calc(100dvh - 48px);
    object-fit: contain;
}
#announcementPopup .announcement-close {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 30px;
    height: 30px;
    padding: 0;
    display: grid;
    place-items: center;
    border: 1px solid #ffffff80;
    border-radius: 50%;
    background: #000b;
    color: #fff;
    font: 20px/1 Arial, sans-serif;
    cursor: pointer;
}
#announcementPopup .announcement-close:focus-visible { outline: 3px solid #e1ad20; outline-offset: 2px; }
html.announcement-visible,
html.announcement-visible body {
    overflow: hidden !important;
    overscroll-behavior: none;
}
/* Fixed body also prevents background touch scrolling on mobile browsers. */
html.announcement-visible body {
    position: fixed !important;
    top: var(--announcement-scroll-top, 0px);
    left: 0;
    right: 0;
    width: 100%;
}