body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #121212;
    color: white;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #1f1f1f;
    padding: 20px;
}
h1 {
    margin: 0;
    font-size: 24px;
}
.top-nav a {
    color: #00bcd4;
    text-decoration: none;
    margin-left: 20px;
    font-weight: bold;
}
.top-nav a:hover {
    text-decoration: underline;
}
.features-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 40px;
}
.feature {
    background: #1e1e1e;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    text-align: center;
}
.feature h2 {
    color: #00bcd4;
}
footer {
    text-align: center;
    padding: 10px;
    background: #1f1f1f;
}