body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f7f7f7;
    color: #333;
}

header {
    background: #111;
    color: #fff;
    padding: 15px 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav a {
    color: #fff;
    margin-left: 20px;
    text-decoration: none;
}

nav a.active {
    text-decoration: underline;
}

.hero {
    background: #222;
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.btn {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 25px;
    background: #0078ff;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
}

.container {
    width: 90%;
    max-width: 900px;
    margin: auto;
}

.content {
    padding: 40px 0;
}

footer {
    background: #111;
    color: #fff;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}