@import url("https://fonts.googleapis.com/css2?family=Source+Serif+4:wght@400;600&family=Space+Grotesk:wght@500;600&display=swap");

:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --bg-panel: #121821;
  --bg-elevated: #17202b;
  --text: #e6ecf1;
  --muted: #a3b0bf;
  --accent: #66d9c3;
  --accent-2: #f2c572;
  --border: #263242;
  --shadow: rgba(0, 0, 0, 0.35);
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(102, 217, 195, 0.12), transparent 55%),
    radial-gradient(900px 500px at 20% 10%, rgba(242, 197, 114, 0.12), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "Source Serif 4", "Iowan Old Style", "Palatino", "Times New Roman", serif;
  line-height: 1.6;
}

a {
  color: var(--text);
  text-decoration: none;
}

a:hover {
  color: var(--accent);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  padding: 36px 0 16px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(23, 32, 43, 0.8), rgba(11, 15, 20, 0.6));
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
}

.brand {
  font-family: "Space Grotesk", "Helvetica Neue", sans-serif;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.tagline {
  color: var(--muted);
  font-size: 14px;
  margin-top: 6px;
}

.hero {
  padding: 40px 0 24px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: 42px;
  line-height: 1.2;
}

.lede {
  color: var(--muted);
  font-size: 18px;
  max-width: 720px;
}

.breadcrumb {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 12px;
}

.section-title {
  font-family: "Space Grotesk", "Helvetica Neue", sans-serif;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 12px;
}

.cards {
  display: grid;
  gap: 16px;
  padding-bottom: 60px;
}

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 20px 22px;
  border-radius: 16px;
  box-shadow: 0 12px 30px var(--shadow);
}

.card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 22px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.pill {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--accent-2);
  font-size: 12px;
}

.meta {
  display: flex;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
  margin-top: 12px;
}

.topic-list {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 24px;
  margin-bottom: 32px;
}

.topic-divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(102, 217, 195, 0.35), transparent);
  margin: 8px 0 32px;
}

.ai-note {
  background: rgba(102, 217, 195, 0.08);
  border: 1px solid rgba(102, 217, 195, 0.3);
  color: var(--muted);
  border-radius: 14px;
  padding: 16px 20px;
  margin: 12px 0 40px;
  font-size: 14px;
}

.topic-list ol {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.topic-list a {
  color: var(--accent);
}

.topics {
  display: grid;
  gap: 28px;
  padding-bottom: 60px;
}

.topic {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px 26px;
}

.topic h2 {
  margin-top: 0;
  font-size: 22px;
  font-weight: 600;
}

.topic p {
  font-size: 18px;
  line-height: 1.75;
}

.empty {
  padding: 24px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 720px) {
  .hero h1 {
    font-size: 32px;
  }

  .card-header {
    flex-direction: column;
    align-items: flex-start;
  }
}