:root {
  color-scheme: light dark;
  --bg: #f7f7f8;
  --fg: #1c1c1e;
  --muted: #6b6b70;
  --card-bg: #ffffff;
  --border: #e0e0e2;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  --accent: #3b5bdb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17181a;
    --fg: #e8e8ea;
    --muted: #9a9aa0;
    --card-bg: #1f2022;
    --border: #303134;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    --accent: #7c9cff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.subtitle {
  color: var(--muted);
  margin-top: 0;
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 560px) {
  .card-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 1.25rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
}

.card-title {
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.card-blurb {
  color: var(--muted);
  font-size: 0.9rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.back-link:hover {
  color: var(--fg);
}

.primary-button {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.note {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.75rem;
}

.detail-section {
  margin-top: 1.5rem;
}