:root {
  --bg: #FAFAFA; --soft: #F1F1EF; --border: #E6E6E4;
  --text: #0A0A0A; --muted: #666666; --primary: #3F7A00;
  --accent: #ADDE67; --accent-ink: #142600;
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 17px/1.6 "Satoshi", system-ui, sans-serif; }
a { color: var(--primary); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 0; }
.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; font-weight: 600; font-size: 1.05rem; white-space: nowrap; }
.logo svg { width: 38px; height: 38px; flex: none; }
.top a:not(.logo) { text-decoration: none; color: var(--muted); font-weight: 500; padding: 10px 0; }
main { padding: 40px 0 80px; }
h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.1; letter-spacing: -0.03em; margin: 0 0 8px; }
h2 { font-size: 1.35rem; letter-spacing: -0.015em; margin: 40px 0 10px; }
h3 { font-size: 1.05rem; margin: 22px 0 6px; }
p, ul { margin: 0 0 12px; }
ul { padding-left: 22px; }
li { margin-bottom: 4px; }
.meta { color: var(--muted); margin-bottom: 32px; }
.note { padding: 14px 18px; border-radius: 14px; background: var(--soft); color: var(--muted); font-size: .95rem; }
.todo { outline: 1.5px dashed var(--accent); outline-offset: 3px; border-radius: 4px; }
footer { padding: 0 0 80px; color: var(--muted); font-size: .95rem; }
footer nav { display: flex; gap: 20px; margin-top: 8px; }
footer a { color: inherit; }