:root {
  --bg: #f7f8fc;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --btn: #111827;
  --btnText: #ffffff;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container { max-width: 980px; margin: 0 auto; padding: 18px; }

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; gap: 12px; }

.brand { font-weight: 800; text-decoration: none; color: var(--text); font-size: 18px; }
.nav a { margin-left: 12px; text-decoration: none; color: var(--text); font-weight: 600; }
.nav a:hover { text-decoration: underline; }

.hero {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  margin-top: 16px;
}
.hero h1 { margin: 0 0 6px; font-size: 32px; }
.tagline { margin: 0 0 14px; color: var(--muted); }

.hero-buttons { display: flex; gap: 10px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  background: var(--btn);
  color: var(--btnText);
  padding: 10px 14px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--btn);
  cursor: pointer;
}
.btn-outline {
  background: transparent;
  color: var(--btn);
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  margin-top: 16px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}
@media (max-width: 700px) {
  .grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
}

.list { margin-top: 10px; }
.list-item {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  margin-top: 10px;
  text-decoration: none;
  color: var(--text);
}
.list-item:hover { border-color: #cbd5e1; }
.li-title { font-weight: 800; margin-bottom: 4px; }
.li-teaser { color: var(--muted); }

.section-title { margin: 20px 0 0; }

.article .teaser { color: var(--muted); }

.choice { display: block; margin: 8px 0; }
.choice input { margin-right: 8px; }

.footer {
  margin-top: 28px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  background: var(--card);
  color: var(--muted);
}