:root {
  --ink: #10151b;
  --ink-strong: #2a3440;
  --muted: #5d6b7a;
  --faint: #8b98a6;
  --line: #e3e8ee;
  --surface: #ffffff;
  --canvas: #f5f7f9;
  --accent: #0a7d8c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef3f7;
    --ink-strong: #cfd8e0;
    --muted: #9aa7b4;
    --faint: #7b8794;
    --line: #263038;
    --surface: #161d24;
    --canvas: #0e141a;
    --accent: #4bc6d6;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink-strong);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  font-size: 17px;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 72px;
}

header.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

header.brand a {
  font-weight: 800;
  letter-spacing: 3px;
  font-size: 17px;
  color: var(--ink);
  text-decoration: none;
}

h1 {
  color: var(--ink);
  font-size: 30px;
  line-height: 1.25;
  margin: 0 0 8px;
}

h2 {
  color: var(--ink);
  font-size: 20px;
  margin: 36px 0 10px;
}

p, li { color: var(--ink-strong); }

.lead { color: var(--muted); margin-top: 0; }

a { color: var(--accent); }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px 22px;
  margin: 24px 0;
}

.card h2 { margin-top: 0; }

.todo {
  background: #fff6e5;
  border: 1px solid #f0d49a;
  color: #6b4e12;
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 15px;
}

@media (prefers-color-scheme: dark) {
  .todo { background: #2e2718; border-color: #5c4a1e; color: #f0d49a; }
}

table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--ink); }

.scroll-x { overflow-x: auto; }

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 14px;
}

footer a { margin-right: 14px; }