header{
  padding: 100px 25px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 50px;
  flex-wrap: wrap;  
}
.header_text{
  width: 850px;
}
.circle{
  height: 400px;
  width: 400px;

  max-width: 80vw;
  max-height: 80vw;

  overflow: hidden;
  border-radius: 50%;
  border: 20px solid var(--main-brand-color);

  display: flex;
  justify-content: center;
  align-items: center;
}
.circle img{
  height: 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 ease-in-out;
}
nav a:hover::after{
  width: 100%;
}
#toggle_botton{
  display: none;
}
label[for="toggle_botton"]{
  display: none;
}
label[for="toggle_botton"] 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;
  }
  #toggle_botton:checked ~ ul{
    display: flex;
  }
  label[for="toggle_botton"]{
    display: block;
  }
}