my-portfolio/src/css/main.css

/******** Imports ********/
@import "/node_modules/normalize.css/normalize.css";
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans:ital,wght@0,400;0,700;1,400;1,700&family=Share+Tech+Mono&family=Source+Sans+Pro:ital,wght@0,200;0,300;0,400;0,600;0,700;0,900;1,200;1,300;1,400;1,600;1,700;1,900&display=swap');

/****** Root Style ******/
:root{
    /* colours */
    --primaryDefault: hsla(79, 62%, 51%, 1);
    --primaryHover: hsla(79, 75%, 41%, 1);
    --errorDefault: hsla(0, 62%, 51%, 1);
    --grey: hsla(0, 0%, 39%, 1);
    --mutedGrey: hsla(0, 0%, 67%, 0.58);

    /* font sizes */
    --titleFS: 2.25rem;
    --generalFS: 1.125rem;
    --headingFS: 1.5rem;
}

/*** Standard Styles ****/

a:visited{
    color: inherit;
}

h1, nav{
    font-family: Share Tech Mono, monospace;
    font-style: normal;
    font-weight: normal;
    font-size: 2.25rem;
    line-height: 2.5625rem;
    text-transform: lowercase;
}

h2{
    font-family: Noto Sans KR, sans-serif;
    font-style: normal;
    font-weight: 500;
    font-size: 1.5rem;
    line-height: 2.1875rem;
}

a.btn, form input[type="submit"]{
    text-decoration: none;
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 10px;
}
a.btnPrimary, form input[type="submit"]{
    background: var(--primaryDefault);
    color: #FFFFFF;
    border: 5px solid var(--primaryDefault);
    cursor: pointer;
}

a.btnOutline{
    background: #FFFFFF;
    color: var(--primaryDefault);
    border: 5px solid var(--primaryDefault)
}

a.btnPrimary:hover, form input[type="submit"]:hover{
    background: var(--primaryHover);
    box-shadow: 0 6px 4px 0 hsla(0, 0%, 0%, 0.25);
    border: 5px solid var(--primaryHover);
}

a.btnOutline:hover{
    box-shadow: 0 6px 4px 0 hsla(0, 0%, 0%, 0.25);
    border: 5px solid var(--primaryHover);
}

a.btn:active, form input[type="submit"]:active{
    box-shadow: inset 0 6px 4px 0 hsla(0, 0%, 0%, 0.25);
    padding: 0.8rem 1.8rem;
}

body{
    font-family: Noto Sans KR, sans-serif;
    font-style: normal;
    font-weight: 500;
    font-size: 18px;
    line-height: 1.625rem;
}

header{
    background: url("../imgs/hero.jpg") bottom left;
    background-position-y: 700px;
    background-size: cover;
    height: 40%;
    color:  #FFFFFF;
    backdrop-filter: grayscale(100%);
}

nav{
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    padding: 0.25em;
}

nav h1 {
    margin: 0;
}

nav a{
    text-decoration: none;
}

nav ul {
    display: flex;
    flex-direction: row;
    gap: 1em;
    margin: 0;
    justify-content: right;
    align-items: flex-end;
}

nav ul li {
    list-style: none;
}

nav ul li:hover a::before, nav ul li a.active{
    content: '<';
}

nav ul li:hover a::after, nav ul li a.active{
    content: '>';
}

header div{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 10em;
}

header div .btn {
    margin: 2em 0;
}

header div button{
    background: none;
    border: none;
    display: inline-block;
    text-align: center;
    text-decoration: none;
    font-size: 2rem;
    cursor: pointer;
}

i.fa-chevron-down{
    color: var(--mutedGrey);
    font-size: 3.75em;
    margin: 1.5rem 0;
}