body {
    margin: 0;
    padding: 0;
    background-color: #000000;
}

.main {
    display: flex;
    align-items: center;
    justify-content: center;
    /* Fix mobile 100vh address bar issue */
    min-height: 100vh;   /* fallback */
    min-height: 100svh;  /* small viewport height (iOS/Android) */
    min-height: 100dvh;  /* dynamic viewport height */
}

img {
    max-width: 80%;
    height: auto;
    display: block; /* avoid inline baseline gap */
}

/* Accessibility: visually hidden utility for screen readers */
.visually-hidden {
    position: absolute !important;
    height: 1px; width: 1px;
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
    white-space: nowrap;
    border: 0; padding: 0; margin: -1px;
}