* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

header {
    position: sticky;
    top: 0;
    left: 0;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 50px;
}

img {
    width: 800px;
    height: 100vh;
}

@media (max-width: 800px) {
    img {
        width: 500px;
    }
}

@media (max-width: 500px) {
    img {
        width: 100%;
    }
}