:root {
    --light-1: #fdfdfe;
    --light-2: #ddd;
    --light-3: #fed;
    --dark-1: #333;
    --dark-2: #212121;
    --light-transparent-1: rgba(125,125,125, 0.75);
    --dark-transparent-1: rgba(200,195,190,0.15);

    --color-1: #5bf;
    --color-2: #4396cd;

    --background-color: var(--light-1);
    --text-color: var(--dark-1);
    /* --link-color: var(--color-1); */
    --link-focus: var(--dark-2);
}

@media (prefers-color-scheme: dark){
    :root {
        --background-color: var(--dark-2);
        --text-color: var(--light-2);
        --link-color: var(--color-1);
        --link-focus: var(--light-3);
    }
    body {
        a{color:var(--link-color);}
        a:focus{outline-color:var(--link-focus);}
    }
}

body{
    color: var(--text-color);
    background-color: var(--background-color);
    font-size: 18px;
    font: 1.2rem/1.5 Century Gothic, sans-serif;
    margin: 0;
    padding: 0;
    // max-width: 600px;
    // max-width: 55ch;
    // margin: 0 auto;
    // padding: 2.5rem 1.75rem;
}
// header{
//     outline: 2px solid var(--light-2);
//     outline-offset: 1rem;
// }
h1,h2,h3,h4,h5,h6{
    line-height: 1.2; 
    font-family: Arial, serif;
}
h1{
    font-size: 2.45rem;
}
a:focus{
    outline: 0.2rem solid var(--link-focus);
    outline-offset: 0.4rem;
}
p{
    margin-bottom: 2rem;
}
section, aside, footer{
    margin: 2.5rem auto;
}
ul{
    margin-top: -1.25rem;
    margin-bottom: 2.25rem;
}
b{
    background-color: var(--dark-transparent-1);
    padding: 0.4rem;
    margin: -0.4rem;

}
dt{
    font-weight: bold;
    margin-top: 1rem; 
}

dt:target{
    background-color: var(--dark-transparent-1);
    padding: 0.2rem;
    margin: 0.8rem -0.2rem 0 -0.2rem;
    outline: 2px solid var(--light-transparent-1);

}






/* Skip Link */
.skip-link {
    clip: rect(1px, 1px, 1px, 1px);
    display: block;
    block-size: 1px;
    overflow: hidden;
    position: absolute;
    inline-size: 1px;
    top: 1rem;
    left: 1rem;
    z-index: 999;
}
  
  .skip-link:focus {
    clip: auto;
    block-size: auto;
    overflow: visible;
    inline-size: auto;
    color: var(--text-color);
    padding: .2rem .4rem;
    line-height: 1;
}

/* Body */
body {
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    padding: .4rem 1rem;

    nav {
        padding: 0 1rem;
    }

    ul {
        margin: 0;
        padding: 0;
        list-style-type: none;
        display: flex;
        flex-wrap: wrap;
        gap: .6rem;

        li {
            padding: .6rem .4rem;
        }

        a {
            color: var(--text-color);
            text-decoration: none;
            border-bottom: 2px solid var(--link-color);
            padding-bottom: .1rem;

            &:focus, &:hover {
                padding-bottom: 0;
            }
        }
    }
}

footer {
    display: flex;
    justify-content: center;
    padding: .4rem 1rem;
    margin: 0;

    nav {
        padding: 0 1rem;
    }

    ul {
        margin: 0;
        padding: 0;
        list-style-type: none;
        display: inline-flex;
        flex-wrap: wrap;
        gap: .6rem;

        li {
            padding: .6rem .4rem;
        }

        a {
            color: var(--text-color);
            text-decoration: none;
            border-bottom: 2px solid var(--link-color);
            padding-bottom: .1rem;

            &:focus, &:hover {
                padding-bottom: 0;
            }
        }
    }
}


/* Main */
main {
    max-width: 600px;
    max-width: 55ch;
    margin: 0 auto;
    padding: 2.5rem 1.75rem;
    flex: auto;
}