p {
    font-size: larger;
    line-height: 1.6;
}

hr.clear{
    clear:both;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}

    img.center {
        margin-left: auto;
        margin-right: auto
    }
video.center {
    display: block;
    margin-right: auto;
    margin-left: auto;
    max-width: 100%;
    height: auto;
}
img.right{
    float:right;
}
details {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    margin-bottom: 10px;
    padding: 15px;
    cursor: pointer;
}

summary {
    font-size: 1.2em;
    outline: none;
}

details[open] summary {
    border-bottom: 1px solid #ddd;
    margin-bottom: 10px;
    padding-bottom: 10px;
}

.answer {
    padding-top: 10px;
    color: #555;
}

.responsive-image {
    width: auto;
    height: 200px;
    display: block;
    aspect-ratio: 16 / 9;
}