body {
    margin: 0;
    padding: 0;
    font-family: "Helvetica", sans-serif;
    display: flex;
    flex-direction: column;
}

header, main {
    max-width: 90rem;
    margin: 0 auto;
}
header {
    background-color: #f0f1f5;
    color: #01bdbe;
    display: flex;
    width: 100%;
    justify-content: center;
}

nav {
    display: flex;
    justify-content: center;
    background-color: #f0f1f5;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    margin: 0;
    padding: 1rem 0;
    list-style-type: none;
    display: flex;
    justify-content: center;
    padding-inline-start: 0;
}

li {
    display: inline-block;
    background-color: #f0f1f5;
    text-align: center;
    width: 13.75rem;
    padding: 1.5rem 0;
    border-right: 3px solid #fff;
}

ul li:first-child {
    border-left: 3px solid #fff;
}

.fa-solid, nav a {
    display: block;
    color: #00d3d4;
    font-size: 2rem;
    text-align: center;
    text-decoration: none;
}

.fa-solid {
    margin: 0 auto;
    width: 2.5rem;
    padding-bottom: 1.25rem;
}

section, article {
    display: inline-block;
}
main {
    display: flex;
    flex-direction: row;
}

.contacts {
    padding: 3rem 16.75rem 0.5rem 3rem;
    background-color: #555c6f;
    color: #b2b6c0;
    float: left;
}

.social-media {
    padding-top: 2rem;
}

.social-media .fa-brands {
    color: #b2b6c0;
    display: inline-block;
    padding: 1rem 1rem 1rem 0;
}

.about {
    background-color: #00d3d4;
    padding: 3rem;
    color: white;
    display: flex;
}

h2 {
    margin: 0;
    font-size: 2rem;
}

h2:nth-child(1) {
    margin-top: 1.25rem;
}

.contacts h2 {
    margin-bottom: 62px;
}


.about p {
    width: 20.5rem;
    padding: 0 11.75rem 0 0;
    font-size: 1.5rem;
}

article img {
    border: white 10px solid;
    width: 16.75rem;
}

.footer {
    padding-top: 9.625rem;
}

li:hover{
    background-color: #00d3d4;
}

li:hover a, li:hover .fa-solid {
    color: #f0f1f5;
}

@media (max-width: 768px) {  
    
    nav, nav ul, nav ul li {
        width: 100%;
    }
     nav > ul {
        border: none;
        flex-direction: column;
     }

    nav ul li {
        border: none;       
    }
    ul li:first-child {
        border: none; 
    }

    main {
        flex-direction: column;
    }
    .contacts {
        order: 2;
        padding: 2rem;
    }
    .about {
        order: 1;
        flex-direction: column;
    }
    .about p, .about img{
        width: 100%;
        padding: 0;
    }
    
    .contacts {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .footer {
        padding-top: 2rem;
    }

}