Parlak Buton

<html>
    <head>
        <title>Shiny Button</title>
    </head>
    <body>
        <div class="container">
            <a href="#" class="btn btn-hover">CodeBlanks</a>
            <a href="#" class="btn btn-hover bg-black">Shine</a>
            <a href="#" class="btn btn-anim">Animated Shine</a>
            <a href="#" class="btn-alt">Alternative Shine Effect</a>
        </div>
    </body>
</html>

@import url(https://fonts.googleapis.com/css?family=Raleway:300);

:root {
    --btn-border: 1px solid rgba(255, 255, 255, 0.2);
    --btn-bg: transparent;
    --btn-shadow: 1px 1px 25px 10px rgba(255, 255, 255, 0.5);
    --btn-text-color: #f4f4f4;
    --shine-degree: 120deg;
    --shine-color: rgba(255, 255, 255, 0.2);
    --shine-effect: linear-gradient(var(--shine-degree), transparent, var(--shine-color), transparent);
    --shine-transition: all 0.65s ease-in-out;
}

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    background: #111;
    font-family: "Raleway", Arial, Helvetica, sans-serif;
}

body .container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding: 2rem;
}

.btn {
    position: relative;
    overflow: hidden;
    font-size: 1.1rem;
    padding: 1rem 3rem;
    border-radius: 4px;
    text-decoration: none;
    border: 4px solid rgba(255, 255, 255, 0.2);
    color: #f4f4f4;
    background: #8d3131;
    width: 400px;
    height: 100px;
    border-radius: 50px;
    text-align: center;
    align-content: center;
}

.btn:not(:last-child) {
    margin-bottom: 3rem;
}

.btn::before {
    content: "";
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.bg-black {
    background: #000000;
}

.btn-hover::before {
    left: -100%;
    transition: all 0.65s ease-in-out;
}

.btn-hover:hover::before {
    left: 100%;
}

.btn-hover:hover {
    box-shadow: 1px 1px 7px 5px rgb(255 255 255 / 10%);
}

.btn-anim::before {
    -webkit-animation: shine 5s ease-in-out infinite;
    animation: shine 5s ease-in-out infinite;
}

@-webkit-keyframes shine {
    0% {
        left: -100%;
        transition-property: left;
    }

    11.5044247788%,
    100% {
        left: 100%;
        transition-property: left;
    }
}

@keyframes shine {
    0% {
        left: -100%;
        transition-property: left;
    }

    11.5044247788%,
    100% {
        left: 100%;
        transition-property: left;
    }
}

.btn-alt {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 250px;
    height: 60px;
    font-size: 1.1rem;
    position: relative;
    overflow: hidden;
    border-radius: 4px;
    text-decoration: none;
    border: var(--btn-border);
    color: var(--btn-text-color);
    background: var(--btn-bg);
}

.btn-alt:not(:last-child) {
    margin-bottom: 3rem;
}

.btn-alt::before,
.btn-alt::after {
    content: "";
    display: block;
    position: absolute;
    height: 100%;
    top: 0;
}

.btn-alt:before {
    background: rgba(255, 255, 255, 0.5);
    width: 60px;
    left: 0;
    filter: blur(30px);
    -webkit-animation: shine-alt1 5s ease-in-out infinite;
    animation: shine-alt1 5s ease-in-out infinite;
}

.btn-alt:after {
    background: rgba(255, 255, 255, 0.2);
    width: 30px;
    left: 30px;
    filter: blur(5px);
    -webkit-animation: shine-alt2 5s ease-in-out infinite;
    animation: shine-alt2 5s ease-in-out infinite;
}

@-webkit-keyframes shine-alt1 {
    0% {
        opacity: 0.5;
        transform: translateX(-100px) skewX(-15deg);
        transition-property: opacity, transform;
    }

    11.5044247788%,
    100% {
        opacity: 0.6;
        transform: translateX(300px) skewX(-15deg);
        transition-property: opacity, transform;
    }
}

@keyframes shine-alt1 {
    0% {
        opacity: 0.5;
        transform: translateX(-100px) skewX(-15deg);
        transition-property: opacity, transform;
    }

    11.5044247788%,
    100% {
        opacity: 0.6;
        transform: translateX(300px) skewX(-15deg);
        transition-property: opacity, transform;
    }
}

@-webkit-keyframes shine-alt2 {
    0% {
        opacity: 0;
        transform: translateX(-100px) skewX(-15deg);
        transition-property: opacity, transform;
    }

    11.5044247788%,
    100% {
        opacity: 1;
        transform: translateX(300px) skewX(-15deg);
        transition-property: opacity, transform;
    }
}

@keyframes shine-alt2 {
    0% {
        opacity: 0;
        transform: translateX(-100px) skewX(-15deg);
        transition-property: opacity, transform;
    }

    11.5044247788%,
    100% {
        opacity: 1;
        transform: translateX(300px) skewX(-15deg);
        transition-property: opacity, transform;
    }
}