*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    min-height: 100vh;
    background: url('/pattern-7451714_1280.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}
nav{
    margin-bottom: 19px;
}
.card {
    
    background: none;
    backdrop-filter: blur(40px);
    color: white;
    margin-left: 19px;
    display: inline-block;
    margin-bottom: 19px;
    animation-name: blu;
    animation-duration: 2s;
    animation-iteration-count: infinite;
}
img{
    height: 210px;
    left: 50px;
    display: inline-block;
}
.card:hover {
transform: scale(1.05);
}
img:hover {
transform: rotate(39deg); 
}
.btn:hover {
    transform: scale(1.1);
    background-color: rgb(255, 255, 255);
    color: blue;
}
a:hover {
    transform: scale(1.2);
}
@keyframes blu {
   0%,
   5%,
   10%
   {
          backdrop-filter: blur(5px);
          color: white;
          transform: scale(1.00001);
 }
     20%,
     40%,
     50% {
        backdrop-filter: blur(25px);
        color: rgb(231, 206, 206);
        transform: scale(0.9);
     }
     60%,
     70%,
     80%,
     90%,
     100%{
         backdrop-filter: blur(50px);
         color: rgb(124, 113, 113);
         transform: scale(1);
     }
}