shared.css

body {
    background-color: black;
    color: white;
    box-sizing: border-box;
}

.active {
    color: rgba(255,255,255,0.5);
}

header {
    position: fixed;
    width: 100%;
    height: 80px;
    top: 0;
    left: 0;
    z-index: 10;
    transition: height 0.6s ease-out;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2.5rem;
    background: rgba(0,0,0,0.8);
    border-radius: 5px;
}

nav a {
    text-decoration: none;
    color: white;
    display: inline-block;
    -webkit-transition: transform 0.3s ease-out;
    -moz-transition: transform 0.3s ease-out;
    -ms-transition: transform 0.3s ease-out;
    -o-transition: transform 0.3s ease-out;
    transition: transform 0.3s ease-out;
}

nav a:hover {
    color: inherit;
    text-decoration: none;
    transform: translateY(-10%);
}

.navbar__logo {
    font-family: 'Montserrat';
    font-weight: 700;
    font-size: 2rem;
}

.navbar__links a {
    margin: 0 1rem;
}

main {
    margin-top: 7.5rem;
}

.hamburger-menu {
    display: none;
}

.hamburger-menu--line {
    width: 1.5rem;
    height: 0.2rem;
    background-color: white;
    margin: 4px 0;
    border-radius: 3px;
}

header.mobile__nav {
    z-index: 50;
    background: black;
    height: 100vh;
}

.navbar__links.mobile__nav {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    text-align: center;
}

.navbar__links.mobile__nav a {
    margin: 2rem 0;
}

@media (max-width: 480px) {
    .hamburger-menu {
        display: inline-block;
        cursor: pointer;
    }

    .navbar__links {
        display: none;
    }

}