* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #111;
    color: white;
}

header {
    padding: 100px 20px;
    text-align: center;
    background-color: #1a1a1a;
}

main {
    max-width: 900px;
    margin: auto;
    padding: 50px 20px;
}

section {
    margin-bottom: 60px;
}

h1 {
    font-size: 48px;
}

h2 {
    font-size: 32px;
}

footer {
    padding: 30px;
    text-align: center;
    background-color: #1a1a1a;
}