:root {
  --bg: #fbf4e6;
  --ink: #221e1a;
  --muted: #6f665c;
  --tomato: #e4412b;
  --line: #e6dccb;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #1b1816; --ink: #f8f1e4; --muted: #b9afa3; --line: #3a3531; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 40px 20px 80px; }
.brand { font-weight: 800; letter-spacing: -0.02em; font-size: 22px; text-decoration: none; color: var(--ink); }
.brand::after { content: ""; display: inline-block; width: 7px; height: 7px; margin-left: 6px; border-radius: 50%; background: var(--tomato); }
h1 { font-size: clamp(30px, 6vw, 44px); line-height: 1.05; letter-spacing: -0.03em; margin: 28px 0 8px; }
h2 { font-size: 21px; margin: 36px 0 8px; letter-spacing: -0.01em; }
p, li { color: var(--ink); }
.muted { color: var(--muted); font-size: 15px; }
a { color: var(--tomato); }
table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0; }
th, td { text-align: left; vertical-align: top; padding: 10px 8px; border-bottom: 1px solid var(--line); }
.todo { background: #fff3b0; color: #221e1a; padding: 0 4px; border-radius: 3px; }
footer { margin-top: 56px; padding-top: 16px; border-top: 1px dashed var(--line); font-size: 14px; color: var(--muted); }