Как создать глассморфные (стекломорфные) кнопки с ховер-эффектом для сайта

Кнопки основаны на дизайнерском эффекте, называемым стекломорфизм или глассморфизм, элементы которого напоминают прозрачное стекло. Из-за особенностей такого дизайна они хорошо смотрятся только на темном или графическом фоне.

ВЕРХНЯЯ И НИЖНЯЯ ПОДСВЕТКА

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НИЖНЯЯ ПОДСВЕТКА

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HTML КОД:

<div class="glass-btn glass-btn-red">
    <a href="#url">Подробнее</a>
</div>
<div class="glass-btn glass-btn-blue">
    <a href="#url">Подробнее</a>
</div>
<div class="glass-btn glass-btn-green">
    <a href="#url">Подробнее</a>
</div>

CSS КОД:

.glass-btn {
    position: relative;
    width: 220px;
    height: 50px;
    margin: 20px;
    display: inline-block;
    text-align: center;
}
.glass-btn a {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 15px 15px rgba(0, 0, 0, 0.3);
    border-radius: 30px;
    padding: 0 10px;
    letter-spacing: 1px;
    text-decoration: none;
    text-transform: uppercase;
    overflow: hidden;
    color: #fff;
    font-family: "Roboto", sans-serif;
    font-weight: bold;
    font-size: 16px;
    z-index: 1;
    transition: 0.5s;
    backdrop-filter: blur(15px);
}
.glass-btn:hover a {
    letter-spacing: 3px;
}
.glass-btn a:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(to left, rgba(255, 255, 255, 0.15), transparent);
    transform: skewX(45deg) translate(0);
    transition: 0.5s;
    filter: blur(0px);
}
.glass-btn:hover a:before {
    transform: skewX(45deg) translate(200px);
}
.glass-btn a:after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    transition: 0.5s;
    border-radius: 30px;
    z-index: -1;
}
.glass-btn:hover a:after {
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}
.glass-btn:before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translatex(-50%);
    bottom: -5px;
    width: 30px;
    height: 10px;
    background: #f00;
    border-radius: 10px;
    transition: 0.5s;
    transition-delay: 0.5;
}
.glass-btn:hover:before {
    bottom: 0;
    height: 50%;
    width: 80%;
    border-radius: 30px;
}
.glass-btn:after {
    content: "";
    position: absolute;
    left: 50%;
    transform: translatex(-50%);
    top: -5px;
    width: 30px;
    height: 10px;
    background: #f00;
    border-radius: 10px;
    transition: 0.5s;
    transition-delay: 0.5;
}
.glass-btn:hover:after {
    top: 0;
    height: 50%;
    width: 80%;
    border-radius: 30px;
}
.glass-btn.glass-btn-red a:after,
.glass-btn.glass-btn-red:before,
.glass-btn.glass-btn-red:after {
    background: #ff4747;
    box-shadow: 0 0 5px #ff4747, 0 0 15px #ff4747, 0 0 30px #ff4747, 0 0 60px #ff4747;
}
.glass-btn.glass-btn-blue a:after,
.glass-btn.glass-btn-blue:before,
.glass-btn.glass-btn-blue:after {
    background: #419cec;
    box-shadow: 0 0 5px #419cec, 0 0 15px #419cec, 0 0 30px #419cec, 0 0 60px #419cec;
}
.glass-btn.glass-btn-green a:after,
.glass-btn.glass-btn-green:before,
.glass-btn.glass-btn-green:after {
    background: #38ba35;
    box-shadow: 0 0 5px #38ba35, 0 0 15px #38ba35, 0 0 30px #38ba35, 0 0 60px #38ba35;
}
    

.glass-btn {
    position: relative;
    width: 220px;
    height: 50px;
    margin: 20px;
    display: inline-block;
    text-align: center;
}
.glass-btn a {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 15px 15px rgba(0, 0, 0, 0.3);
    border-radius: 30px;
    padding: 0 10px;
    letter-spacing: 1px;
    text-decoration: none;
    text-transform: uppercase;
    overflow: hidden;
    color: #fff;
    font-family: "Roboto", sans-serif;
    font-weight: bold;
    font-size: 16px;
    z-index: 1;
    transition: 0.5s;
    backdrop-filter: blur(15px);
}
.glass-btn:hover a {
    letter-spacing: 3px;
}
.glass-btn a:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(to left, rgba(255, 255, 255, 0.15), transparent);
    transform: skewX(45deg) translate(0);
    transition: 0.5s;
    filter: blur(0px);
}
.glass-btn:hover a:before {
    transform: skewX(45deg) translate(200px);
}
.glass-btn a:after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    width: 0;
    height: 0;
    transition: 0.5s;
    border-radius: 30px;
    z-index: -1;
}
.glass-btn:hover a:after {
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}
.glass-btn:before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translatex(-50%);
    bottom: -5px;
    width: 30px;
    height: 10px;
    background: #f00;
    border-radius: 10px;
    transition: 0.5s;
    transition-delay: 0.5;
}
.glass-btn:hover:before {
    bottom: 0;
    height: 80%;
    width: 80%;
    border-radius: 30px;
}
.glass-btn.glass-btn-red a:after,
.glass-btn.glass-btn-red:before {
    background: #ff4747;
    box-shadow: 0 0 5px #ff4747, 0 0 15px #ff4747, 0 0 30px #ff4747, 0 0 60px #ff4747;
}
.glass-btn.glass-btn-blue a:after,
.glass-btn.glass-btn-blue:before{
    background: #419cec;
    box-shadow: 0 0 5px #419cec, 0 0 15px #419cec, 0 0 30px #419cec, 0 0 60px #419cec;
}
.glass-btn.glass-btn-green a:after,
.glass-btn.glass-btn-green:before {
    background: #38ba35;
    box-shadow: 0 0 5px #38ba35, 0 0 15px #38ba35, 0 0 30px #38ba35, 0 0 60px #38ba35;
}