body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    background-color: #000;
    color: #fff;
    background-image: url('https://wallpapers.com/images/featured/espacio-oscuro-0mh5r43wp68yf29o.jpg');
    background-size: cover;
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-position: center;
}

body::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

header {
    background: rgba(0, 0, 0, 0.8);
    padding: 20px 0;
    text-align: center;
}

header h1 {
    color: #00d1ff;
    font-size: 2.5rem;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.7);
}

nav {
    background-color: rgba(10, 10, 50, 0.9);
    border-bottom: 2px solid #00d1ff;
}

nav .nav-link {
    color: #fff;
    transition: color 0.3s ease-in-out;
    text-decoration: none;
}

nav .nav-link:hover {
    color: #00d1ff;
}

main h2, main h3 {
    color: #ffa500;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.6);
}

.card {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: none;
    transition: transform 0.3s ease-in-out;
}

.card:hover {
    transform: scale(1.05);
}

.card img {
    border-bottom: 2px solid #00d1ff;
}

footer {
    background-color: rgba(10, 10, 50, 0.9);
    text-align: center;
    padding: 20px 0;
    border-top: 2px solid #00d1ff;
}

footer p {
    margin: 0;
    color: #00d1ff;
}

.card-img-top {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

img {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 50%;
}