:root {
  --ink: #14181f;
  --muted: #5c6778;
  --line: #e3e8ef;
  --paper: #f6f8fb;
  --card: #ffffff;
  --navy: #0b0d14;
  --star: #4f81d1;
  --link: #2b6cb0;
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

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

.topbar {
  background: var(--navy);
  color: #fff;
}

.topbar-inner,
.page,
.bottom {
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  text-decoration: none;
}

.brand strong {
  display: block;
  font-size: 22px;
  letter-spacing: -0.02em;
}

.brand small {
  display: block;
  margin-top: 2px;
  color: #9aa1b4;
  font-size: 10px;
  letter-spacing: 0.28em;
}

.top-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

.top-links a { color: #d5dbe6; text-decoration: none; }
.top-links a[aria-current="page"] { color: #fff; }

.page { padding: 48px 0 72px; }

.sheet {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 40px 40px 16px;
  box-shadow: 0 18px 40px rgba(20, 24, 31, 0.05);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(32px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.updated { margin: 0 0 28px; color: var(--muted); }

h2 {
  margin: 32px 0 8px;
  font-size: 20px;
  letter-spacing: -0.02em;
}

p, li { font-size: 16px; }

ul { padding-left: 20px; }

.bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 8px 0 36px;
  color: var(--muted);
  font-size: 14px;
}

.bottom nav { display: flex; gap: 16px; }
.bottom a { color: var(--muted); }

@media (max-width: 700px) {
  .topbar-inner { min-height: 68px; align-items: flex-start; flex-direction: column; padding: 16px 0; }
  .sheet { padding: 28px 20px 8px; }
  .page { padding-top: 28px; }
}