.header {

    width: 100%;
    height: 40%;
    background-color: black;    
}


.portfolio {

    margin-left: 27%;
}

.social {

    margin-left: 45%;

}


.container {
    position: relative;
    width: 50%;
    float: left;
  }
  
  .image {
    display: block;
    width: 50%;
  }
  
  .overlay {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100%;
    width: 50%;
    opacity: 0;
    transition: .5s ease;
    background-color: black;
  }
  
  .container:hover .overlay {
    opacity: 1;
  }
  
  .text {
    color: white;
    font-size: 20px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    font-family: Arial, Helvetica, sans-serif;
  }

  .footer {
    background-color: black;
    font-family: Arial, Helvetica, sans-serif;
    width: 100%;
}

h3{
    color: white;
    font-size: 14px;
    margin-top: 2px;
    text-align: center;
}