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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: lightblue;
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column; 
}

.container a {
    position: relative;
    width: 300px;
    height: 120px;
    display: inline-block;
    background: #fff;
    margin: 20px;
}

.container a:before,
.container a:after {
    content: '';
    position: absolute;
    inset: 0;
    background: #f00;
    transition: 0.5s;
}

.container a:nth-child(1):before,
.container a:nth-child(1):after {
    background: linear-gradient(45deg, #00ccff, #0e1538, #d400d4);
}
.container a:nth-child(2):before,
.container a:nth-child(2):after {
    background: linear-gradient(45deg, #ff075b, #0e1538, #1aff22);
}

.container a:hover:before {
    inset: -3px;
}

.container a:hover:after {
    inset: -3px;
    filter: blur(10px);
}

.container a span {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: inline-block;
    background: #0e1538;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.6em;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #fff;
    border: 1px solid #040a29;
    overflow: hidden;
}

.container a span::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.075);
    transform: skew(25deg);
}