:root { color: #1c1915; background: #f7f4ee; font-family: Georgia, "Times New Roman", serif; }
body { margin: 0; }
header, main, footer { width: min(720px, calc(100% - 32px)); margin: 0 auto; }
header { padding: 20px 0 8px; display: flex; justify-content: space-between; align-items: baseline; }
header a { color: inherit; text-decoration: none; font-weight: 700; }
nav a { margin-left: 14px; color: #1f4e79; font-size: 14px; }
h1 { font-size: 34px; line-height: 1.2; margin: 12px 0; }
h2 { font-size: 20px; margin: 28px 0 8px; }
p, li { font-size: 17px; line-height: 1.5; }
.note { background: #fff; border-left: 4px solid #1f4e79; padding: 10px 12px; }
.todo { background: #fff6e8; border: 1px dashed #c65911; padding: 12px; }
a.button { display: inline-block; background: #1f4e79; color: #fff; text-decoration: none; padding: 10px 14px; border-radius: 999px; }
footer { padding: 28px 0 40px; color: #5c564c; font-size: 14px; }
footer a { color: #1f4e79; }