Credit Card UI/style.css
@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,200;0,300;0,400;1,200;1,400&display=swap');

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500&display=swap');
*{
    margin :0;
    padding :0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}
body{
    overflow: hidden;

}
section{
    display:flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #1c1c25;
}
section::before{
    content: '';
    position: absolute;
    bottom: -40%;
    left: 40%;
    width: 600px;
    height: 600px;
    background:linear-gradient(#f00 ,#f0f);
    border-radius: 50%;
}
.card{
    position: relative;
    width: 508px;
    height: 314px;
    transform-style: preserve-3d;
    perspective: 500px;

}
.card .face{
    position:absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    box-shadow:  0 15px 35px rgba(0,0,0,0.5);
    border-radius: 15px;
    background: rgba(255 ,255, 255, 0.05);
    backdrop-filter: blur(10px);
    transform-style: preserve-3d;
    transition: 1s;
    backface-visibility: hidden;
}
.card:hover .face.front{
    transform: rotateY(180deg);
}
.card .face.back{
    transform: rotateY(180deg);
}
.card:hover .face.back{
    transform: rotateY(360deg);
}
.card .face.front::before{
    content: '';
    position: absolute;
    bottom:40px;
    right:40px;
    width:60px;
    height: 60px;
    background:#fff;
    border-radius:50%;
    opacity: 0.5;
}
.card .face.front::after{
    content: '';
    position: absolute;
    bottom:40px;
    right:80px;
    width:60px;
    height: 60px;
    background:#fff;
    border-radius: 50%;
    opacity: 0.7;
}
.card .face.front .debit{
    position: absolute;
    left: 40px;
    top: 30px;
    color:#fff;
    font-weight: 500;
}
 .card .face.front .bank{
    position: absolute;
    right: 40px;
    top: 25px;
    color: #fff;
    font-weight: 500;
    font-style: italic;
    font-size: 24px;
}

.card .face.front .chip{
    position: absolute;
    top: 65px;
    left: 50px;
    max-width: 164px;
}

.card .face.front .number{
    position: absolute;
    bottom: 135px;
    left: 40px;
    color: #fff;
    font-weight: 500;
    letter-spacing: 6px;
    font-size: 18px;
    text-shadow: 0 2px 1px #0005;
    font-family: 'orbitron',sans-serif;
}
.card .face.front .valid{
    position: absolute;
    bottom: 80px;
    left: 40px;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight:300;
    line-height: 1em;
    font-size: 18px;
    text-align: right;
}
.card .face.front .valid span:last-child{
    margin-left: 20px;
    font-weight:400;
    letter-spacing: 2px;
    font-size: 16px;
}

.card .face.front .cardHolder{
    position: absolute;
    bottom: 40px;
    left: 40px;
    color: #fff;
    font-weight: 300;
    font-size: 16px;
    letter-spacing: 2px;
}
.card .face.back .blackbar{
    position: absolute;
    top: 40px;
    width: 508px;
    height: 60px;
    background: #000;

}

.card .face.back .ccvtext{
    position: absolute;
    top: 120px;
    left: 30px;   
}
.card .face.back .ccvtext h5{
    color: #fff;
    font-weight: 400;
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
}
.card .face.back .ccvtext .whitebar{
    position:relative;
    width: 400px;
    height: 40px;
    background: #fff;
    margin-top: 5px;
}

.card .face.back .ccvtext .cvv{
    position:relative;
    top: -35px;
    left: 395px;
    background: rgb(158, 147, 147);
    color: #111;
    width: 50px;
    height: 30px;
    font-weight: 600;
    letter-spacing: 3px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.card .face.back .text{
    position: absolute;
    bottom: 30px;
    left: 30px;
    color: #fff;
    font-size: 10px;
    font-weight: 300;
    line-height: 1.4em;
}


@media only screen and (max-width: 768px) {
    /* For mobile phones: */
    [class*="col-"] {
      width: 100%;
      
    }
  }