* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f5f5f7;
    color: #1d1d1f;
    line-height: 1.6;
}

header {
    background: #fff;
    border-bottom: 1px solid #e0e0e0;
    padding: 24px 20px;
    text-align: center;
}
header h1 { font-size: 28px; font-weight: 700; letter-spacing: -0.5px; }
header p { color: #6e6e73; margin-top: 6px; font-size: 16px; }
header nav { margin-top: 14px; font-size: 15px; }
header nav a { margin: 0 10px; }

main { max-width: 680px; margin: 40px auto; padding: 0 20px; }

section {
    background: #fff;
    border-radius: 12px;
    padding: 28px;
    margin-bottom: 20px;
}

h2 { font-size: 20px; font-weight: 600; margin-bottom: 12px; }
h3 { font-size: 16px; font-weight: 600; margin: 16px 0 6px; }
p { color: #3a3a3c; margin-bottom: 12px; }
p:last-child { margin-bottom: 0; }
ul { padding-left: 20px; color: #3a3a3c; }
li { margin-bottom: 8px; }

a { color: #0071e3; text-decoration: none; }
a:hover { text-decoration: underline; }

.muted { color: #6e6e73; font-size: 14px; }

footer { text-align: center; padding: 32px 20px; color: #6e6e73; font-size: 14px; }