site.css

* {
    margin: 0;
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #999;
}

p {
    margin: .5em 0;
}

header {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #a493c0;
    padding: 10px;
    z-index: 1000;
    text-align: center; /* Center-align text inside header */
}

nav {
    display: inline-block;
}

nav ul {
    display: inline-flex; /* Use inline-flex to center the list items horizontally */
    padding: 0;
    margin: 0;
    list-style: none;
}

nav ul li {
    margin: 0 5px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

nav ul li a:hover {
    text-decoration: underline;
}

main {
    display: block;
    background-image: url("images/background.png");
    padding-top: 3em;
    padding-bottom: 3em;
    min-height: 85%;
}

footer {
    padding: 15px;
    background-color: #a493c0;
    color: #fff;
    text-align: center;
}

aside {
    position: fixed;
    bottom: 10px; /* Position it 10px from the bottom */
    left: 10px; /* Position it 10px from the left */
    text-align: center;
    padding: 1em; /* Adjust padding as needed */
    z-index: 1000; /* Ensure it's above other content */
}

aside img {
    max-width: 100px; /* Reduce the maximum width of the logo */
    height: auto;
    display: block;
    margin: 0 auto; /* Center the logo horizontally within the aside */
}

article {
    width: 75%;
    margin: 0 auto; /* Center the article */
}

.banner {
    width: 450px; /* Set a smaller width */
    height: 310px; /* Set the height equal to width */
    border-radius: 40%; /* Make the image round */
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    display: block;
    margin: 0 auto; /* Center the banner image */
}

h1 {
    font-size: 2.5em;
    color: #333;
    text-align: center; /* Center-align the heading */
}

.sub-title {
    background-color: transparent; /* Remove the white background */
    font-size: 1.2em;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center; /* Center-align the subtitle text */
}


footer nav ul {
    display: flex;
    justify-content: center;
}

footer nav ul li {
    margin: 0 10px;
}

footer nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

footer nav ul li a:hover {
    text-decoration: underline;
}

.columns {
    display: flex;
}

@media only screen and (min-width: 768px) {
    main {
        display: flex;
    }
    aside {
        margin-left: 2%;
    }
    .columns-desktop {
        display: flex;
    }
}

/* Pies */

.pie {
    width: 200px;
    padding: 10px;
    margin: 10px;
    background-color: #fff;
    border: solid 1px #ccc;
}

.pie img {
    width: 100%;
}

.pie .title {
    font-weight: bold;
}

.pie .columns {
    width: 100%;
}

.pie .price {
    text-align: right;
}

.pie .columns div {
    width: 50%;
}

.pie button {
    background-color: #f6aeae;
    padding: 10px;
    border: solid 1px #f6aeae;
    border-radius: 3px;
    color: #fff;
}