:root {
    --color-bg: #fff;
    --color-fg: #333;
    --color-alpha : #09c;
}

html {
    line-height: 1;
    text-size-adjust: 100%;
    box-sizing: border-box;
    font-size: 62.5%;
    tab-size: 4;
    cursor: default;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Droid Sans", "Helvetica Neue", Arial, sans-serif;
    font-size: 1.6em;
    line-height: 1.4;
    background: var(--color-bg);
    color: var(--color-fg);
    margin: 0 auto;
    padding: 2rem;
    max-width: 64rem;
}
*, *:before, *:after {
    box-sizing: inherit;
    background-repeat: no-repeat;
}

a {
    color: var(--color-alpha);
    text-decoration: none;
    background-color: transparent;
    border-bottom: dotted var(--color-alpha) 1px;

    &:hover {
        border-bottom: solid var(--color-fg) 1px;
    }
}

header {
    h1 { margin: 0; }
    p { margin: 0; }
    margin: 0 0 2rem;
}

nav {
    border-bottom: dotted #999 1px;
    padding: 0 0 2rem;
    margin: 0 0 2rem;
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    justify-content: space-between;

    select {
        -webkit-appearance: none;
        -moz-appearance: none;
        appearance: none;
        font: inherit;
        color: inherit;
        margin: 0;
        padding: .4rem 1rem;
        text-transform: none;
        background: #fff;
        border: solid #999 1px;
        border-radius: .3rem;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 40'%3E %3Cpath fill='none' stroke='%234c5e88' stroke-linecap='square' stroke-width='10' d='M10 10l20 20 20-20'/%3E %3C/svg%3E");
        background-repeat: no-repeat;
        background-position: center right 1rem;
        background-size: 12px auto;
        text-transform: capitalize;
    }

    input {
        font: inherit;
        color: inherit;
        margin: 0;
        padding: .4rem 1rem;
        text-transform: none;
        background: #fff;
        border: solid #999 1px;
        border-radius: .3rem;
        option { text-transform: capitalize; }
    }

}

main {

    .hidden {
        display: none;
    }

    #index {
        ul {
            padding: 0;
            margin: 0 auto;
            display: grid;
            gap: .5rem;
    
            @media (min-width: 20rem) {
                grid-template-columns: repeat(2, 1fr);
            }
              
            @media (min-width: 36rem) {
                grid-template-columns: repeat(3, 1fr);
            }

            > li {
                list-style: inside disc;
                text-transform: capitalize;
            }
        }
    } 
    #content {
        h2 {
            margin: 0 0 1rem;
            text-transform: capitalize;
        }
        figure {
            display:inline-block;
            padding: 2rem;
            margin: 0 1rem 0 0;
            border: dotted .1rem var(--color-fg);
            border-radius: .3rem;
    
            iframe {
                width: 10rem;
                height: 10rem;
                border: none;
            }
            figcaption {
                font-size: 80%;
            }
        }
        pre {
            background: var(--color-fg);
            color: var(--color-bg);
            margin: 2rem 0;
            padding: 2rem;
            border-radius: .3rem;
            overflow-x: scroll;   

            .comm {
                color: #999;
            }
            strong {
                color: var(--color-alpha);
            }
        }
    }
}

::-webkit-scrollbar { width: .5rem; } // Width 
::-webkit-scrollbar-track { background: none; } // Track 
::-webkit-scrollbar-thumb { background: gainsboro; } // Handle 
::-webkit-scrollbar-thumb:hover { background: gainsboro; } // Handle on hover