body {
    background-color: #ecf4f5;
    margin: 0;
    padding: 0;
}

.page {
    width: 100%;
    max-width: 1110px;
    min-width: 400px;
    margin-left: auto;
    margin-right: auto;
    background-color: white;
    margin-top: 10px;
    margin-bottom: 100px;
}

@media only screen and (max-width: 1110px) {
    .page {
        margin-top: 0px;
        margin-bottom: 0px;
    }
}

.header {
    background-color: #E0E0E0;
    height: 50px;
    padding: 20px;
    position: relative;
    margin-bottom: 20px;
}

.header-content {
    position: absolute;
    bottom: 10px;
    left: 100px;
}

span.header-name {
    font-family: sans-serif;
    font-weight: bold;
    font-size: 2em;
    color: #f00;
    margin: 5px;
    text-shadow: 0.1em 0.1em 0.2em #716f6f;
}

span.header-text {
    font-family: sans-serif;
    font-size: 1.2em;
    font-weight: bold;
    color: #0f095f;
    margin: 5px;
    text-shadow: 0.1em 0.1em 0.2em #716f6f;
}

@media only screen and (max-width: 1200px) {
    .header {
        height: 50px;
        padding: 15px;
        margin-bottom: 15px;
    }

    .header-content {
        bottom: 10px;
        left: 50px;
    }

    span.header-name {
        font-size: 1.8em;
        margin: 5px;
        text-shadow: 0.08em 0.08em 0.18em #716f6f;
    }

    span.header-text {
        font-size: 1.1em;
        margin: 5px;
    }
}

@media only screen and (max-width: 900px) {
    .header {
        height: 50px;
        padding: 10px;
        margin-bottom: 10px;
    }

    .header-content {
        bottom: 10px;
        left: 20px;
    }

    span.header-name {
        font-size: 1.6em;
        margin: 5px;
        text-shadow: 0.06em 0.06em 0.16em #716f6f;
    }

    span.header-text {
        font-size: 1em;
        margin: 5px;
    }
}

div.space {
    height: 20px;
}

@media only screen and (max-width: 1200px) {
    div.space {
        height: 15px;
    }
}

@media only screen and (max-width: 900px) {
    div.space {
        height: 10px;
    }
}

.footer {
    margin-top: 20px;
    padding: 15px;
    text-align: center;
    font-size: 1.2em;
    background-color: #F0F0F0;
}

@media only screen and (min-width: 1200px) {
    .footer {
        margin-top: 15px;
    }
}

@media only screen and (min-width: 900px) {
    .footer {
        margin-top: 10px;
    }
}

p.chapter {
    font-size: 1.2em;
    line-height: 30px;
}

@media only screen and (min-width: 1200px) {
    p.chapter {
        padding-left: 5px;
        padding-right: 5px;
        line-height: 30px;
        padding-bottom: 10px;
    }
}

@media only screen and (max-width: 1200px) {
    p.chapter {
        padding-left: 5px;
        padding-right: 5px;
    }
}

@media only screen and (min-width: 1200px) {
    p.chapter {
        padding-left: 100px;
        padding-right: 50px;
    }
}

div.image {
    padding-left: 100px;
}

@media only screen and (max-width: 1200px) {
    p.chapter {
        font-size: 1.1em;
        line-height: 25px;
        padding-left: 50px;
        padding-right: 40px;
    }

    .footer {
        padding: 10px;
        font-size: 1.1em;
    }
}

@media only screen and (max-width: 1200px) {
    div.image {
        padding-left: 50px;
    }
}

@media only screen and (max-width: 900px) {
    p.chapter {
        font-size: 1em;
        line-height: 20px;
        padding-left: 20px;
        padding-right: 20px;
    }

    .footer {
        padding: 8px;
        font-size: 1em;
    }
}

p.part {
    padding-bottom: 0px;
}

@media only screen and (max-width: 900px) {
    div.image {
        padding-left: 20px;
    }
}

div.image img {
    width: calc(100% - 20px);
    max-width: 800px;
    border: 1px solid lightgray;
}

div.example {
    padding-left: 100px;
}

    div.example a {
    }

a:link, a:visited,
a:active, a:hover {
    color: blue;
}

a:hover {
    background-color: #c7d1d6;
}

@media only screen and (max-width: 900px) {
    br {
        display: none;
    }
}

br.no-hidden {
    display: inline;
}