@import url("https://fonts.googleapis.com/css2?family=Source+Serif+4:wght@400;600;700&family=Space+Grotesk:wght@400;600&display=swap");

:root {
  --bg: #f6f4f0;
  --ink: #1f2a30;
  --muted: #5f6b72;
  --accent: #1f4e79;
  --accent-2: #1c7c78;
  --card: #ffffff;
  --border: #e6e1d8;
  --shadow: 0 10px 30px rgba(31, 42, 48, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: radial-gradient(1200px 800px at 10% -10%, #dfeef4 0%, transparent 60%),
    radial-gradient(1000px 600px at 95% 0%, #e5f4ee 0%, transparent 55%),
    var(--bg);
}

a {
  color: inherit;
  text-decoration: none;
}

header {
  padding: 40px 6vw 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: var(--shadow);
}

.hero {
  margin-top: 24px;
  display: grid;
  gap: 16px;
  max-width: 860px;
}

.hero h1 {
  font-family: "Source Serif 4", serif;
  font-size: clamp(2rem, 2vw + 1.5rem, 3.2rem);
  margin: 0;
}

.hero p {
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 0;
  color: var(--muted);
}

.nav-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.nav-pill {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  font-size: 0.9rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) 3fr;
  gap: 24px;
  padding: 0 6vw 60px;
}

.side {
  position: sticky;
  top: 24px;
  align-self: start;
  background: var(--card);
  border-radius: 16px;
  padding: 18px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.side h3 {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--muted);
}

.side a {
  display: block;
  padding: 8px 10px;
  border-radius: 10px;
  margin-bottom: 6px;
  background: #f8f7f4;
}

.content {
  display: grid;
  gap: 20px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.card {
  background: var(--card);
  border-radius: 18px;
  padding: 18px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: grid;
  gap: 10px;
}

.card h3 {
  margin: 0;
  font-size: 1.1rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #edf3f6;
  color: var(--accent);
  font-size: 0.78rem;
}

.section {
  background: var(--card);
  border-radius: 18px;
  padding: 22px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.section h2 {
  font-family: "Source Serif 4", serif;
  margin: 0 0 6px;
}

.section p {
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

pre {
  background: #0f1b21;
  color: #e7f2f6;
  padding: 14px;
  border-radius: 12px;
  overflow-x: auto;
  font-size: 0.9rem;
}

.callout {
  border-left: 4px solid var(--accent-2);
  padding: 10px 14px;
  background: #f0faf8;
  border-radius: 10px;
  margin-top: 12px;
}

footer {
  padding: 20px 6vw 40px;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .side {
    position: relative;
    top: 0;
  }
}