Border Animation Button

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Border Animation Button</title>
    <style>
        body {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-color: #333;
            margin: 0;
        }
        .border-animation-button {
            padding: 20px 40px;
            font-size: 18px;
            font-weight: bold;
            color: #fff;
            background: #3498db;
            border: 4px solid transparent;
            border-radius: 30px;
            cursor: pointer;
            outline: none;
            position: relative;
            transition: all 0.3s ease;
        }
        .border-animation-button::before {
            padding: 37px 40px;
            content: '';
            position: absolute;
            top: -4px;
            left: -4px;
            right: -4px;
            bottom: -4px;
            background: linear-gradient(45deg, #ff0000, #ff00ff, #0000ff, #00ff00, #ff0000);
            background-size: 400%;
            border-radius: 30px;
            z-index: -1;
            animation: border-animation 5s infinite;
            transition: all 0.3s ease;
        }
        @keyframes border-animation {
            0% {
                background-position: 0% 50%;
            }
            50% {
                background-position: 100% 50%;
            }
            100% {
                background-position: 0% 50%;
            }
        }
        .border-animation-button:hover::before {
            filter: brightness(1.2);
        }
        .border-animation-button span {
            position: relative;
            z-index: 1;
        }
    </style>
</head>
<body>
    <button type="button" class="border-animation-button">
        <span>Border Animation</span>
    </button>
</body>
</html>

Border Animation Button - VexaX