html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    background: linear-gradient(to bottom, #000000, #000000, #003366, #00cc99);
    color: white;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
}

/* Rest of your existing CSS styles */

header {
    background-color: black;
    padding: 10px;
}

nav {
    display: flex;
    justify-content: flex-start;
}

.navbar {
    display: flex;
    align-items: center;
}

.navbar-brand a {
    font-size: 24px;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

main {
    padding: 20px;
}