body {
    overflow-y: scroll;
}


.demo-container .header {
    height: 80px;
    border-bottom: 3px solid #f88e1d;
    position: absolute;  top: 0; right:0; left:0;
}

.demo-container .main-menu {
    background: #e8e8e8;
    height: 80px;
}

.demo-container .logo {
    /*width: 193px;*/
    height: 40px;
    float: left;
    cursor: pointer;
    position: relative;
    right: 12px;
    top: 7px;
    padding-left: 50px;
    padding-right: 4px;
    border-right: 1px solid rgba(0, 0, 0, 0.2);
}


.demo-container .external-footer {
    background-color: #f88e1d;
    width: 100%;
    position: absolute;  bottom: 0; right:0; left:0;
}

.footer {
    height: 60px;
    width: 920px;
    margin: 0 auto;

}

.copyright {
    color: #fff;
    padding-top: 19px;
}

.buttons-demo {
    margin-top: 150px;
    width: 100%;
    align-self: center;
}


.buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.buttons > div {
    width: 660px;
    flex-wrap: nowrap;
    display: flex;
}

.buttons-column > div {
    width: 330px;
    height: 100px;
    text-align: center;
}

.buttons-column {
    width: 660px;
    justify-content: center;
}


.btn {
  width: 300px;
  height:80px;
  border: none;
  display: block;
  text-align: center;
  cursor: pointer;
  text-transform: uppercase;
  outline: none;
  overflow: hidden;
  position: relative;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  background-color: #8b8b8b;
  padding: 17px 60px;
  margin: 0 auto;
  box-shadow: 0 5px 15px rgba(0,0,0,0.20);

}

.btn span {
  position: relative;
  z-index: 1;
}

.btn:after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 490%;
  width: 140%;
  background: #68c4f8;
  -webkit-transition: all .5s ease-in-out;
  transition: all .5s ease-in-out;
  -webkit-transform: translateX(-98%) translateY(-25%) rotate(45deg);
  transform: translateX(-98%) translateY(-25%) rotate(45deg);
}

.btn:hover:after {
  -webkit-transform: translateX(-9%) translateY(-25%) rotate(45deg);
  transform: translateX(-9%) translateY(-25%) rotate(45deg);
}

a, a:hover {
  text-decoration: none;
}

.link {
  font-size: 20px;
  margin-top: 30px;
}

.link a {
  color: #000;
  font-size: 25px;
}