body {
    font-family: Arial, sans-serif;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    background: whitesmoke;
}

header {
    background: #fff;
    padding: 20px 40px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.07);
}

header h1 {
    margin: 0;
    font-size: 28px;
    color: #333;
}

.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

h2 {
    color: #333;
    margin-top: 40px;
    font-size: 24px;
}

p,
li {
    font-size: 16px;
    color: #444;
}

ul {
    padding-left: 20px;
}

.highlight-box {
    background: #fff;
    padding: 15px 20px;
    margin: 30px 0;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}