header{
    display: flex;
    padding-top: 20px;
    padding-bottom: 20px;
    padding-left: 160px;
    background: var(--main-brand-color);
}
.header_text{
    width: 850px;
}
.circle{
    height: 300px;
    width: 250px;
    overflow: hidden;
    border-radius: 50%;
    border: 10px solid var(--main-brand-color);
    display: flex;
}
.circle img{
    width: 100%;
}

nav {
    position:sticky;
    top: 0px;
    background: var(--light-secondary-color);
}

footer ul, nav ul {
    list-style: none;
    display: flex;
    gap: 140px;
    padding-top: 24px;
    padding-bottom: 24px;
}

footer ul li a, nav ul li a {
    color: var(--secondary-text-color);
    text-decoration: none;
    position: relative;
    padding: 3px;
}

nav a:hover, footer a:hover{
    color: var(--text-color);
}
nav a::after, footer a::after{
    content: '';
    height: 2px;
    width: 0;
    background: var(--main-brand-color);
    position: absolute;
    bottom: 0;
    left: 0;
    transition: 300ms ease-in-out;
}
nav a:hover::after, footer a:hover::after{
    width: 100%;
}