Webleb - UI Elements - HTML Button Hover Effects Example

:root {
    --x1: rgb(205, 180, 219);
    --x2: rgb(255, 200, 221);
    --x3: rgb(255, 175, 204);
    --x4: rgb(189, 224, 254);
    --x5: rgb(162, 210, 255);
    --x6: black
}

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

body{
    background-color: var(--x1);
    align-items: center;
    justify-content: center;
    display: flex;
    min-height: 100vh;
}

.buttonBox{
    gap: 40px;
    display: flex;
}
button{
    cursor: pointer;
}
.button1 {
    width: 300px;
    height: 70px;
    background-color: var(--x3);
    font-size: 20px;
    border: none;
    box-shadow: 0 4px 16px 0 rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.button1::before {
    content: "";
    position: absolute;
    top: 0;
    left: -75px;
    width: 60px;
    height: 100%;
    background: linear-gradient(120deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.5) 50%, rgba(255,255,255,0.05) 100%);
    transform: skewX(-20deg);
    pointer-events: none;
    transition: none;
    opacity: 0;
}

.button1:hover::before {
    animation: shine-move 0.7s;
    opacity: 1;
}

.button2{
    width: 300px;
    height: 70px;
    background-color: var(--x4);
    font-size: 20px;
    border: none;
    box-shadow: 0 4px 16px 0 rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.button2::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    height: 3px;
    width: 0;
    background: var(--x6);
    transition: width 0.35s cubic-bezier(.4,0,.2,1);
}

.button2:hover::after {
    width: 100%;
}

.button3{
    width: 300px;
    height: 70px;
    background: linear-gradient(270deg, var(--x1), var(--x2), var(--x3), var(--x4), var(--x5), var(--x1));
    background-size: 1400% 1400%;
    font-size: 20px;
    border: 2px solid transparent;
    box-shadow: 0 4px 16px 0 rgba(0, 0, 0, 0.15);
    animation: rainbow-flow 4s linear infinite;
    color: var(--x6);
    transition: 
        filter 0.2s,
        border-color 0.35s cubic-bezier(.4,0,.2,1);
}
.button3:hover {
    border-color: #000;
}

@keyframes rainbow-flow {
    0% { background-position: 0% 50%;}
    100% { background-position: 100% 50%;}
}

@keyframes shine-move {
    0% {
        left: -75px;
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    50% {
        left: 120%;
        opacity: 1;
    }
    100% {
        left: 120%;
        opacity: 0;
    }
}

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