HTML CSSとJavaScriptでの色の変更効果

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https://www.instagram.com/webstreet_code/

    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Instagram Card with Colorful Border</title>
    <style>
        body {
            margin: 0;
            height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            background-color: #1d1f20; /* Dark background for contrast */
            font-family: Arial, sans-serif;
        }

        .instagram-card {
            width: 300px;
            color:white;
            height: 400px;
            background-color: #393939; /* Silver background for the card */
            border: 10px solid transparent; /* Initial border */
            border-radius: 15px; /* Rounded corners */
            animation: borderAnimation 6s linear infinite; /* Slower animation for card border */
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            position: relative; /* For button positioning */
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1); /* Subtle shadow for depth */
        }

        .profile-image {
            width: 100px; /* Circular image width */
            height: 100px; /* Circular image height */
            border-radius: 50%; /* Make the image circular */
            object-fit: cover; /* Ensure the image covers the area */
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2); /* Shadow for profile image */
            margin-bottom: 15px; /* Space between image and text */
        }

        .instagram-name {
            font-size: 20px; /* Font size for Instagram name */
            font-weight: bold; /* Bold font */
            color: #cbc4c4; /* Dark color for contrast */
            margin-bottom: 10px; /* Space between name and description */
        }

        .follow-button {
            margin-top: 20px; /* Space between card and button */
            padding: 10px 20px; /* Padding for the button */
            border: none; /* No border */
            border-radius: 5px; /* Rounded corners for button */
            cursor: pointer; /* Pointer cursor on hover */
            color: #fff; /* White text */
            font-size: 16px; /* Font size for button text */
            animation: buttonAnimation 6s linear infinite; /* Slower animation for button border */
            background: transparent; /* Transparent background */
            position: absolute; /* Position absolute to overlap with card */
            bottom: 20px; /* Positioned at the bottom of the card */
            left: 50%; /* Center the button */
            transform: translateX(-50%); /* Adjust for centering */
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2); /* Shadow for button */
        }

        @keyframes borderAnimation {
            0% {
                border-image: linear-gradient(45deg, #ff0080, #ff8c00, #ff0080, #ff8c00) 1; /* Pink to Orange */
            }
            50% {
                border-image: linear-gradient(45deg, #00f260, #0575e6, #00f260, #0575e6) 1; /* Green to Blue */
            }
            100% {
                border-image: linear-gradient(45deg, #ff0080, #ff8c00, #ff0080, #ff8c00) 1; /* Return to Pink to Orange */
            }
        }

        @keyframes buttonAnimation {
            0% {
                border: 2px solid transparent; /* Initial transparent border */
                background: linear-gradient(45deg, #ff0080, #ff8c00); /* Initial gradient */
            }
            50% {
                border: 2px solid transparent;
                background: linear-gradient(45deg, #00f260, #0575e6); /* Change gradient */
            }
            100% {
                border: 2px solid transparent;
                background: linear-gradient(45deg, #ff0080, #ff8c00); /* Return to initial gradient */
            }
        }

        .follow-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            border-radius: 5px; /* Match button corners */
            background: linear-gradient(45deg, #ff0080, #ff8c00);
            z-index: -1; /* Behind the button */
            animation: buttonAnimation 6s linear infinite; /* Button background animation */
            opacity: 0.8; /* Slight transparency for overlay */
        }
    </style>



    <div class="instagram-card">
        <img class="profile-image lazy" src="/static/imghwm/default1.png" data-src="./logo.jpg" alt="Profile Picture"> <!-- Replace with your image URL -->
        <div class="instagram-name">@webstreet_code</div> <!-- Replace with your Instagram page name -->
        <p>Your Daily Dose of Learning.</p>
        <button class="follow-button">Follow Us</button>
    </div>

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