.header {
  font-family: "Arial Narrow";
  font-size: 21px;
  padding: 50px;
  letter-spacing: 2px;
  color: #7A7A7A;
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  text-align: center;
}

.title {
  margin-left: -300px;
}

.center {
  display: flex;
  margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}

.footer {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  text-align: center;
}

.img-title {
  position: relative;
  width: 100%;
}

.img-main {
  display: none;
  position: relative;
  width: 50%;
}

.img-cf {
  margin-left: 70%;
  position: relative;  
  width: 12%;
  padding: 15px;
}

.img-contact {
  display: none;
  position: relative;
  width: 50%;
}

@media only screen and (max-width: 600px) {
  
  .header {
    font-family: "Arial Narrow";
    font-size: 12px;
    padding: 50px;
    letter-spacing: 2px;
    color: #7A7A7A;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    text-align: center;
  }
  
  .title {
    margin-left: -315px;
    width: 80%;
  }

  .center {
    display: flex;
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
  }
  
  .footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    text-align: center;
  }
  
  .img-title {
    position: relative;
    width: 100%;
  }
  
  .img-main {
    transform: scale(2);
    display: none;
    position: relative;
    right: 20%;
    width: 50%;    
  }
  
  .img-contact {
    transform: scale(2);
    display: none;
    left: 20%;
    position: relative;
    width: 50%;
  }

  .img-cf {
    margin-left: 70%;
    position: relative;  
    width: 12%;
    padding: 15px;
  }  
}