html {
    background-image: none;    
}
.content {
    width: 90%;
    margin: auto;
    font-size: 1.6rem;
    color: initial;
    padding-bottom: 100px;
}
@media only screen and (min-width: 900px) {
    .content {
        width: 50%;
    }
  }
img {
    background-color: #5F6368;
    height: 200px;
    padding: 10px;
    box-sizing: border-box;
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
}
@media (prefers-color-scheme: dark) {
    img {
        background-color: transparent;
    }       
}
h1 {
    text-align: center;
}
h2 {
    font-size: 2rem;
}
p, li {
    text-align: justify;
}