a.css

@import url('https://fonts.googleapis.com/css?family=Josefin+Sans:400,400i,600,600i');
html,body{
  margin:0;
  height:120%;
  font-family: 'Josefin Sans', sans-serif;

}
/* Add a black background color to the top navigation */
.topnav {
    background-color: transparent;
    overflow: hidden;
    float: right;

  }
  
  /* Style the links inside the navigation bar */
  .topnav a {
    float: left;
    color: #f2f2f2;
    text-align: right;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  align-content:center;
  margin: 15px;
  padding:0px 10px;
  font-weight:900;
  font-size:1.1em;
  line-height:1;
  box-sizing:border-box;
  height:40px
  }
  
  /* Change the color of links on hover */
  .topnav a:hover {
    background-color: #ddd;
    color: black;
  }
  
  /* Add a color to the active/current link */
  .topnav a.active {
    background-color: #7dc3be;
    color: white;
  }
  
a{
  text-decoration:none
}
.header{

  position:relative;
  overflow:hidden;
  display:flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  align-content: flex-start;
  height:50vw;
  min-height:400px;
  max-height:600px;
  min-width:300px;
  color:#eee;
}
.header:after{
  content:"";
  width:100%;
  height:100%;
  position:absolute;
  bottom:0;
  left:0;
  z-index:-1;
 background: linear-gradient(to bottom, rgba(0,0,0,0.12) 40%,rgba(27,32,48,1) 100%);
}
.header:before{
  content:"";
  width:100%;
  height:200%;
  position:absolute;
  top:0;
  left:0;
    -webkit-backface-visibility: hidden;
    -webkit-transform: translateZ(0); backface-visibility: hidden;
  scale(1.0, 1.0);
    transform: translateZ(0);
  background:#1B2030 url(https://upload.wikimedia.org/wikipedia/commons/thumb/1/16/Lusitano_Hengst_%28132668445%29.jpeg/1200px-Lusitano_Hengst_%28132668445%29.jpeg) 50% 0 no-repeat;
  background-size:100%;
  background-attachment:fixed;
  animation: grow 3600s  linear 10ms limited-animation;
  transition:all 0.4s ease-in-out;
  z-index:-2
}
.header a{
  color:#eee
}
.menu{
  display:block;
  width:40px;
  height:30px;
  border:2px solid #fff;
  border-radius:3px;
  position:absolute;
  right:20px;
  top:20px;
  text-decoration:none
}
.menu:after{
  content:"";
  display:block;
  width:20px;
  height:3px;
  background:#fff;
  position:absolute;
  margin:0 auto;
  top:5px;
  left:0;
  right:0;
  box-shadow:0 8px, 0 16px
}
.logo{
  border:2px solid #fff;
  border-radius:3px;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  align-content:center;
  margin:20px;
  padding:0px 10px;
  font-weight:900;
  font-size:1.1em;
  line-height:1;
  box-sizing:border-box;
  height:40px
}
.sides, .info{
  flex: 0 0 auto;
  width:50%
}
.info{
  width:100%;
  padding:15% 10% 0 10%;
  text-align:center;
  text-shadow:0 2px 3px rgba(0,0,0,0.2)
}
.author{
  display:inline-block;
  width:50px;
  height:50px;
  border-radius:50%;
  background:url(https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQOlqzRxKRZnQQV30-9lICfN8uVq85-tgh6ZittoeXRR1vNdglXnDEVTw1kj-i8MdqjbKg&usqp=CAU) center no-repeat;
  background-size:cover;
  box-shadow:0 2px 3px rgba(0,0,0,0.3);
  margin-bottom:3px
}
.info h4, .meta{
  font-size:0.7em
}
.meta{
  font-style:italic;
}
@keyframes grow{
  0% { transform: scale(1) translateY(0px)}
  50% { transform: scale(1.2) translateY(-400px)}
}
.content{  
  padding:5% 10%;
  text-align:justify
}
.btn{
  color:#333;
  border:2px solid;
  border-radius:3px;
  text-decoration:none;
  display:inline-block;
  padding:5px 10px;
  font-weight:600
}

.twtr{
  margin-top:100px
}.btn.twtr:after{content:"\1F426";padding-left:5px}









.footer-basic {
    padding:20px 0;
    background-color:#818181;
    background-image: url("giorgio-manenti-YH-P6HiTlkQ-unsplash.jpg");
    color:#434343;
   width: 100%;
  }
  
  .footer-basic ul {
    padding:0;
    list-style:none;
    text-align:center;
    font-size:18px;
    line-height:1.6;
    margin-bottom:0;
  }
  
  .footer-basic li {
    padding:0 10px;
  }
  
  .footer-basic ul a {
    color:inherit;
    text-decoration:none;
    opacity:0.8;
  }
  
  .footer-basic ul a:hover {
    opacity:5;
    color: #000000;

  }
  
  
  .footer-basic .copyright {
    margin-top:15px;
    text-align:center;
    font-size:18px;
    color:#000000;
    margin-bottom:0;
  }