header{
    padding: 100px 25px;
    display: flex;
    justify-content: center;
    align-items: center;  
    gap: 50px;  
    flex-wrap: wrap;
}
.header_text{
    width: 850px;
}
.circle{
    width: 400px;
    max-width: calc(90% - 30px);
    border: 10px solid var(--text-color);
   
    
 display: flex;
    justify-content: center;
    align-items: center;

}
.circle img{
    width: 100%;
}
nav{
    margin-bottom: 120px;
}
nav ul{
    list-style: none;
    display: flex;
    gap: 20px;
}
nav a{
    color: var(--secondary-text-color);
    text-decoration: none;
    position: relative;
    padding: 3px;
}
nav a:hover{
    color: var(--text-color);
}
nav a::after{
    content: '';
    height: 2px;
    width: 0;
    background: var(--main-brand-color);
    position: absolute;
    bottom: 0;
    left: 0;
    transition: 150ms easa-in-out;
 }
nav a:hover::after{
    width: 100%;
}
#toggle_button{
    display: none;
}
label[for="toggle_button"]{
    display: none;
}
label[for="toggle_button"] span{
    font-size: 40px;
}
@media(max-width: 800px){
    nav{
        position: absolute;
        top: 0;
        left: 0;
        background: var(--secondary-color);
        padding: 15px;
        border-radius: 0 0 25px 0;
}
nav ul{
    display: none;
    flex-direction: column;
 }
    #toggle_button:checked ~ ul{
        display: flex;
 }
label[for="toggle_button"]{
    display: block;
     }
     }