:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #111111;
}

* { box-sizing: border-box; }

body.hopium {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: #fff;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}

.brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}

.nav a {
  text-decoration: none;
  color: var(--text);
  margin-left: 16px;
  opacity: 0.7;
}

.nav a:hover {
  opacity: 1;
  text-decoration: underline;
}

main.container {
  padding: 40px 20px;
}

.page-title {
  font-size: 34px;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.prose h2 { margin-top: 32px; }
.prose h3 { margin-top: 20px; }
.prose p { margin: 0 0 16px; }

.button {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}

.button:hover { opacity: 0.9; }

.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin: 14px 0;
}

.meta {
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 30px 0;
  color: var(--muted);
}