:root{
    --dark-background-color: #e8e7e7;
    --light-background-color: #fcfcff;/* #f8f8f8; */
}

*{
    margin: 0;
    padding: 0;
}

body{
    /*background-color: var(--light-background-color);*/
    background-color: var(--dark-background-color);
}

header.page-header{
    position: relative;
    background-color: var(--light-background-color);
    padding: 0.75em 1.5em;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    margin-bottom: 2em;
    animation-name: header-drop-down;
    animation-timing-function: ease-in-out;
    animation-duration: 0.2s;
    box-shadow: 0px 2px 3px #00000060;
}

header.page-header .logo{
    font-weight: bold;
    font-size: 2em;
    color: var(--light-background-color);
    text-shadow: -1px -1px 1px #ffffffcb, 
        1px 1px 2px #000000cb;
    font-family: 'Gruppo', Arial, Helvetica, sans-serif;;
}

header.page-header nav ul{
    list-style: none;
}

header.page-header nav ul li{
    line-height: 2em;
    vertical-align: middle;
    display: inline-block;
}

section.page-content{
    width: 80%;
    margin-left: auto;
    margin-right: auto;

    box-shadow: -1px -1px 3px #ffffff70, 
        1px 1px 4px #00000070;

    background-color: var(--light-background-color);
    animation-name: article-fade-in;
    animation-timing-function: ease-in-out;
    animation-duration: 0.2s;
}

section.page-content article{
    padding: 1em 1.5em;
}

section.page-content article p{
    margin-top: 1em;
    font-family: 'Heebo', sans-serif;
}

section.page-content article p:first-child{
    margin-top: 1.25em;
}

section.page-content article header h2{
    font-family: monospace;
    border-bottom: 1px solid var(--dark-background-color);
    padding-bottom: 0.4em;
    margin-bottom: 0.6em;
}

@media only screen and (min-width: 560px) and (max-width: 768px) { 
    
    header.page-header{
        margin-bottom: 1.5em;
    }

    section.page-content{
        width: 90%;
    }
}

@media only screen and (max-width: 560px) { 
    header.page-header{
        margin-bottom: 1em;
    }

    section.page-content{
        width: 94%;
    }
}

@keyframes header-drop-down{
    from { top: -5em; }
    to { top: 0em; }
}

@keyframes article-fade-in {
    from { opacity: 0; transform: translateY(-24px); }
    to { opacity: 1; transform: translateY(0); }
}


canvas{
    width: 80%;
    height: 50vh;
    border: 1px solid var(--dark-background-color);
    margin-left: auto;
    margin-right: auto;
    display: block;
}