body {
    margin: 0; padding: 0;
    background: url('https://images.blizzard.com/wow/media/screenshots/screenshot-of-the-day/wrath-of-the-lich-king/wrath-of-the-lich-king-3-full.jpg') no-repeat center center fixed; 
    background-size: cover;
    font-family: 'Arial', sans-serif;
    color: #eee;
    display: flex; justify-content: center; align-items: center; height: 100vh;
}
.card {
    background: rgba(15, 15, 15, 0.85);
    padding: 30px;
    border-radius: 10px;
    border: 2px solid #c41e3a; /* Rojo Caballero de la Muerte */
    box-shadow: 0 0 20px rgba(0,0,0,0.8);
    text-align: center;
    width: 320px;
}
h1 { color: #c41e3a; text-transform: uppercase; letter-spacing: 2px; }
.btn-wow {
    background: #c41e3a;
    color: white;
    border: none;
    padding: 10px;
    width: 100%;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s;
}
.btn-wow:hover { background: #ff0000; box-shadow: 0 0 10px #c41e3a; }