body {
    font-family: 'Arial', sans-serif;
    background: #0f0f2c;
    color: #ffffff;
    margin: 0;
    padding: 0;
}
header {
    background: #1a1f3d;
    padding: 20px;
    text-align: center;
}
header h1 {
    color: #00c3ff;
    margin: 10px 0;
}
.banner {
    width: 100%;
    max-height: 300px;
    object-fit: cover;
    border-bottom: 3px solid #00c3ff;
}
nav ul {
    list-style-type: none;
    padding: 0;
    display: flex;
    justify-content: center;
    background: #121530;
    margin: 10px 0 0 0;
}
nav ul li {
    margin: 0 15px;
}
nav ul li a {
    color: #ffffff;
    text-decoration: none;
    padding: 8px 12px;
}
nav ul li a.active, nav ul li a:hover {
    background-color: #00c3ff;
    color: #0f0f2c;
    border-radius: 5px;
}
main {
    padding: 20px;
    max-width: 900px;
    margin: auto;
}
footer {
    background: #1c1c3c;
    text-align: center;
    padding: 10px;
}
a {
    color: #00e0ff;
}