header {
   margin: auto;

}

.flex-container {
   display: flex;
   margin: 25px;
   justify-content: space-between;
   max-width: 1220px;
   margin: 20px auto;
}

.black {
   background-color: black;
   width: 50px;
   height: 50px;
}

a {
   margin: 5px;
   color: black;
}

.border {
   border-bottom: 2px solid rgba(139, 139, 139, 0.705);
max-width: 1260px;
margin: auto;
}