body
{
margin: 0;
padding: 0;
font-family: sans-serif;
/* background: #000; */
  }
.container
{
width: 100%;
height: 100vh;
overflow: hidden;
}
.container .column
{
width: 20%;
height: 100%;
float: left;
border-right: 2px solid rgba(0, 0, 0, 0.5);
box-sizing: border-box;
z-index: 1;
}
.container .column:last-child
{
border-right: none;
}
.container .column .content
{
  position: relative;
  height: 100%;
}
.container .column .content h1
{
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  background: rgba(0, 0, 0, 0.1);
  text-align: center;
  margin: 0;
  padding: 0;
  color: rgba(255, 255, 255, 0.2);
  font-size: 1.2em;
  border-top: 2px solid rgba(0, 0, 0, 0.5);
  border-bottom: 2px solid rgba(0, 0, 0, 0.5);

}
.container .column .content .box
{
  position: absolute;
  top:50%;
  transform: translateY(100%);
  box-sizing: border-box;
  padding: 3%;
  background: rgba(255, 255, 255, 1);
  text-align: center;
  transition: 0.5s;
  opacity: 0;
}
.container .column.active .content .box
{
  opacity: 1;
  transform: translateY(-50%);

}
.container .column .content .box h2
{
  margin: 0;
  padding: 0;
  font-size: 18px;
  color: #262626;
}
.container .column .content .box p
{
  color: #262626;
  font-size: .89em;
}
.container .column .bg
{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
}
  .container .column.active .bg.bg1
{
  background: url(images/1.witwe.jpg);
  background-size: cover;
  background-attachment: fixed;
  background-position: top;
  transition: 0.5s;
}

.container .column.active .bg.bg2
{
background: url(images/3.zauberfl.jpg);
background-size: cover;
background-attachment: fixed;
background-position: right;
transition: 0.5s;
}

.container .column.active .bg.bg3
{
background: url(images/2.traviata.jpg);
background-size: cover;
background-attachment: fixed;
background-position: center;
transition: 0.5s;
}

.container .column.active .bg.bg4
{
background: url(images/4.cenerentola.jpg);
background-size: cover;
background-attachment: fixed;
background-position: top;
transition: 0.5s;
}

.container .column.active .bg.bg5
{
background: url(images/5.nabucco.jpg);
background-size: cover;
background-attachment: fixed;
background-position: top;
transition: 0.5s;
}

a
{
  position: absolute;
  top:92%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 130px;
  height:60px;
  text-align: center;
  line-height: 60px;
  color: #fff;
  font-size: 24px;
  text-transform: uppercase;
  text-decoration: none;
  font-family: sans-serif;
box-sizing: border-box;
background: linear-gradient(90deg, #03a9f4, #ffeb3b, #03a9f4);
background-size: 300%;
border-radius: 30px;
z-index: 1;

}
a:hover
{
animation: animate 8s linear infinite;
}
@keyframes animate
{
0%
{
  background-position: 0%
}
100%
{
  background-position: 400%
}
}
a:before
{
content: '';
position: absolute;
top: -5px;
left: -5px;
right: -5px;
bottom: -5px;
z-index: -1;
background: linear-gradient(90deg, #03a9f4, #ffeb3b, #03a9f4);
background-size: 400%;
border-radius: 40px;
filter: blur(20px);
opacity: 0;
transition: 0.5s;
}
a:hover:before
{
filter: blur(20px);
opacity: 1;
animation: animate 8s linear infinite;
}