:root {
  --max: 980px;
  --pad: 18px;
  --border: rgba(0,0,0,0.12);
  --muted: rgba(0,0,0,0.65);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.55;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.header {
  position: sticky;
  top: 0;
  background: white;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 10px var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand {
  font-weight: 900;
  text-decoration: none;
  color: inherit;
  letter-spacing: 0.2px;
  font-size: 1.05rem;
}

.topnav a {
  text-decoration: none;
  color: inherit;
  padding: 6px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
}


.topnav a {
  text-decoration: none;
  color: inherit;
  padding: 7px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
}

.topnav a:hover {
  border-color: var(--border);
  background: rgba(0,0,0,0.03);
}

.main { padding: 16px 0 34px; }

h1 { margin-top: 0; font-size: 2rem; }
h2 { margin-top: 1.6rem; }

h1 { margin-top: 0; font-size: 2.1rem; letter-spacing: -0.4px; }
ul { margin-top: 10px; }

p, li { color: var(--muted); }
strong { color: rgba(0,0,0,0.85); }

.footer { border-top: 1px solid var(--border); padding: 12px 0; color: var(--muted); }

.hero {
  max-width: var(--max);
  margin: 12px auto 26px auto;
  padding: 0 var(--pad);
}

.hero img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
}