body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    position: relative;
    text-align: center;
    color: white;
}

.header-image {
    background-image: url('header.jpg');
    background-size: cover;
    background-position: center;
    height: 350px;
    position: relative;
}

.header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5); /* 50% opacity gray overlay */
    display: flex;
    justify-content: center;
    align-items: center;
}

.header-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.7); /* Semi-transparent black background */
    padding: 1em;
    border-radius: 10px;
    color: white;
    text-align: center;
}

.header-text h1 {
    margin: 0;
    font-size: 2.5em;
}

main {
    padding: 2em;
    max-width: 90%;
    margin: 1em auto;
    background-color: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.download-item {
    margin-bottom: 2em;
}

.item-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.item-content img {
    max-width: 100%;
    height: auto;
}

.item-description {
    text-align: center;
    margin-top: 1em;
}

.download-button {
    display: inline-block;
    margin-top: 1em;
    padding: 0.5em 1em;
    background-color: #333;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}

.download-button:hover {
    background-color: #555;
}

footer {
    text-align: center;
    padding: 1em 0;
    background-color: #333;
    color: white;
}

/* Responsive Design */
@media (min-width: 600px) {
    .item-content {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .item-content img {
        max-width: 40%;
        margin-right: 1em;
    }
    
    .item-description {
        max-width: 50%;
        text-align: left;
    }
}

@media (min-width: 900px) {
    main {
        max-width: 70%;
    }
}