* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    flex-wrap: wrap;
    background: #00020c;
}

.box {
    position: relative;
    width: 300px;
    height: 400px;
    display: flex;
    align-items: center;
    background: rgb(3, 2, 41);
    margin: 40px;
}
.box:before {
    content: "";
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: #fff;
    z-index: -1;
}
.box:after {
    content: "";
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: #fff;
    z-index: -2;
    filter: blur(40px);
}

.box:nth-child(1):before,
.box:nth-child(1):after {
background: linear-gradient(235deg,#89ff00,#010615,#00bcd4);
}

.box:nth-child(2):before,
.box:nth-child(2):after {
background: linear-gradient(235deg,#ff005e,#010615,#fbff00);
}

.box:nth-child(3):before,
.box:nth-child(3):after {
background: linear-gradient(235deg,#ff3300,#010615,#ff002b);
}

.box .glass {
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    display: block;
    background: rgb(74, 73, 87) ;
    pointer-events: none;
    /* z-index: -2; */
}



.box .content {
    padding: 20px;
    color: #fff;
    z-index: 1;
}

.box .content h2 {
    margin-bottom: 20px;
}