Webleb - HTML UI Elements - Nationalflagge

HTML

<!DOCTYPE html>
<html lang="pt-BR">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Bandeira do Brasil Animada</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        body{
            background: black;
            width: 100vw;
            height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }
        /*mastro*/
        .mastro {
            width: 4px;
            height: 600px;
            background: white;
            border-radius: 6px;
            position: relative;
        }
        /*container */
        .container-bandeira {
            display: flex;
            position: relative;
            perspective: 800px;
            margin-left: 12px;
            scale: 0.4;
        }
        /*bandeira do brasil ou branca se não carregar a imagem */
        .national-flag {
            width: 300px;
            height: 210px;
            background-color: white; 
            background-image: url('brazil.png');
            background-size: cover;
            background-position: center;
            position: relative;
            transform-origin: left center;
            animation: tremular 3s ease-in-out infinite;;
        }

/* animacao rotateY + perspective */
        @keyframes tremular {
            0% {
                transform: rotateY(0deg);
            }
            25% {
                transform: rotateY(10deg);
            }
            50% {
                transform: rotateY(0deg);
            }
            75% {
                transform: rotateY(10deg);
            }
            100% {
                transform: rotateY(0deg);
            }
        }

</style>
</head>
<body>
    
    <div class="container-bandeira">
        <div class="mastro"></div>
        <div class="national-flag"></div>
    </div>
</body>
</html>

Nationalflagge

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