main.css

@import url("https://use.typekit.net/fip0bjy.css");

*, *::before, 
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
	font-size: 62.5%;
	/* 1rem = 10px; 1.1rem = 11px; etc. */
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-size: 2rem;
    font-family: 'bai-jamjuree', sans-serif;
    font-weight: 300;
}

h1, h3 {
    font-weight: 500;
}

a, a:visited {
    text-decoration: none;
    color: white;
}

a:hover {
    text-transform: uppercase;
}


/* main grid layout */
.wrapper {
    display: grid;
    grid-template-rows: 8rem calc(100vh - 8rem);
    grid-template-columns: 35rem auto;
    grid-template-areas:
        'header header'
        'sidebar main';
}

/*grid-items*/
header {
    grid-area: header;
    font-family: bai-jamjuree;
    font-size: 2.2rem;
}

.sidebar {
    grid-area: sidebar;
}

main {
    grid-area: main;
}

/*header-styling*/
header {
    padding: 1rem 3rem 1rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 5px 10px 0 rgba(90, 90, 90, 0.3);
    z-index: 1;
    background-color: rgb(3, 2, 12);
}

.primary-navbar a {
    color: white!important;
}

.primary-navbar, .primary-navbar li, .primary-navbar ul {
    display: inline;
}

.logo {
    display: inline;
    height: 100%;
}

.primary-navbar li {
    margin-left: 3rem;
}

header .current {
    font-weight: bolder;
    color: rgb(147, 192, 254)!important;
}

/*sidebar-styling*/

.sidebar {
    background-color: rgb(30, 32, 33);
    overflow: auto;
    color: rgb(147, 192, 254);
}


.toggle-nav {
    outline: none;
    display: none;
}

.label {
    display: none;
}

.burger {
    width: 25px;
    height: 3px;
    background-color: black;
    margin-top: 5px;
    border-radius: 5px;
}

.topics {
    width: 100%;
}

.topic-title {
    font-size: 1.8rem;
    text-align: left;
    padding: 1rem 15rem 1rem 3rem;
    white-space: nowrap;
    color: rgb(147, 192, 254);
    width: 100%;
}

.topic-title > a {
    color: rgb(147, 192, 254);
    font-weight: bold;
    width: 100%;
}
.topic-items > li {
    padding: 1rem 1rem 1rem 3rem;
    white-space: nowrap;
    width: 100%;
}

.topic-title:nth-child(1) {
    margin-top: 5rem;
}

.topic-items {
    padding: 1rem 0 1rem 0;
    font-size: 1.6rem;
    width: 100%;
}

/*main styling*/
main {
    padding: 5rem 10rem 4rem 10rem;
    text-align: justify;
    overflow: auto;
    line-height: 3rem;
    background-color: rgb(30, 32, 33);
    color: white;
}

h1, h3, h6 {
    padding: 1rem 0 1rem 0;
    text-align: left;
    color:rgb(147, 192, 254);
}

main > p {
    padding: 2rem 0 2rem 0;
}

.overview ol {
    list-style-position: inside;
    padding: 1rem 0 1rem 0;
}

@media (max-width: 768px)  {
    html {
        font-size: 45%;
    }    

    /* main grid layout */
    .wrapper {
        grid-template-rows: 8rem minmax(4rem, 1fr) calc(100vh - 12rem);
        grid-template-columns: unset;
        grid-template-areas:
        'header header'
        'sidebar sidebar'
        'main main';
    }

    /* header styling */
    header {
        padding: 1rem 2.5rem 1rem 2.5rem;
    }

    .primary-navbar li {
        margin-left: 1.2rem;
    }

    /* secondary menu styling */
    .label {
        display: inline;
    }

    .sidebar {
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        align-items: flex-start;
        padding: 2rem 2.5rem 2rem 2.5rem;
        box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
        background-color: rgb(147, 192, 254);
    }

    .topics {
        max-height: 0;
        overflow: hidden;
        transition: all ease-in-out 0.7s;
    }

    .topic-title {
        padding: 1rem 0 1rem 0;
        color: black;
    }

    .topic-title > a {
        color: black;
    }
    .topic-items > li {
        padding: 1rem 0 1rem 0;
        white-space: nowrap;
    }
    
    .topic-title:nth-child(1) {
        margin-top: 2rem;
    }
    
    .topic-items {
        padding: 1rem 0 1rem 0;
    }

    .sidebar input:checked ~ .topics {
        max-height: 150vh;
    }

    /* main styling */

    main {
        padding: 3rem 2.5rem 3rem 2.5rem;
    }

    h3 {
        white-space: nowrap;
    }

    a, a:visited {
        color: black;
    }

}