style.css

@import url('https://fonts.googleapis.com/css2?family=Open+Sans&family=Poppins:wght@400;600&display=swap');

:root {
    /* Primary colors */
    --violet: hsl(257 40% 49%);
    --soft-magenta: hsl(300 69% 71%);
    --white: hsl(0 0% 100%);
    --blackish: hsl(0 0% 20%);
}

.flex {
    display: flex;
}

.col {
    flex-direction: column;
}

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: 'Open Sans', sans-serif;
    font-weight: 400;
    color: var(--white);
    text-decoration: none;
}

.body {
    align-items: center;
    background: var(--violet) url(bg-mobile.svg);
    background-size: cover;
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-position: top center;
}

.body > * {
    width: 100%;
    padding: 2em 4em;
}

.logo {
    max-width: 18ch;
}

.main {
    align-items: center;
    gap: 4em;
}

.main > * {
    max-width: 710px;
}

.mockup {
    display: block;
    width: 100%;
}

.text {
    align-items: center;
    gap: 1em;
    text-align: center;
}

.title {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
}

.register-link {
    margin-top: 1em;
}

.register-button {
    padding: 1em 6em;
    background: var(--white);
    color: var(--violet);
    font-size: 1em;
    border: none;
    border-radius: 2em;
    box-shadow: 0 .3em 1em #333;
    cursor: pointer;
    transition: background 300ms ease-in-out, color 500ms ease-in-out;
}

.register-button:hover {
    background: var(--soft-magenta);
    color: var(--white);
    transition: background 200ms ease-in-out, color 300ms ease-in-out;
}

.footer {
    align-items: center;
    gap: 2em
}

.socials {
    width: 100%;
    justify-content: center;
    gap: 1em;
}

.brand-link {
    position: relative;
    width: 2.5em;
    height: 2.5em;
    border: 1px solid var(--white);
    border-radius: 50%;
    transition: transform 100ms ease-in-out;
}

.brand-link:hover {
    background: radial-gradient(circle at top left, hsl(0 0% 100% / .5), hsl(300 69% 71% / .5));
    border: 1px solid var(--soft-magenta);
    box-shadow: inset 0 0 .5em var(--soft-magenta), inset .1em .1em hsl(0 0% 100% / .5), inset -.05em -.05em hsl(0 0% 0% / .2);
    transform: scale(1.3);
    transition: transform 300ms ease-in-out;
}

.brand-link:hover .fa-brands {
    color: var(--soft-magenta);
}

.fa-brands {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}

.attribution { 
    width: 100%;
    font-size: .8em;
    text-align: center;
}

.attribution a {
    color: var(--soft-magenta);
}

.attribution a:hover {
    filter: brightness(150%);
}


@media only screen and (min-width: 1180px) {
    .body {
        background: var(--violet) url(bg-desktop.svg);
        background-size: cover;
        background-attachment: fixed;
        background-repeat: no-repeat;
    }

    .main {
        flex-direction: row;
        align-items: flex-start;
        gap: 3em;
    }

    .text {
        margin-top: 3em;
        align-items: flex-start;
        text-align: left;
    }

    .footer {
        gap: 1em;
    }
    
    .socials {
        justify-content: flex-end;
    }
}