:root {
  color-scheme: light dark;
  --bg: #f5f6fa;
  --fg: #1d2230;
  --accent: #2675ff;
  --card: #ffffff;
  --muted: #5b6175;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
}

.hero {
  background: linear-gradient(135deg, #0c1f45, #123a73);
  color: #fff;
}

.hero h1 {
  margin-top: 0;
}

.hero p {
  line-height: 1.4;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.hero-grid div {
  background: rgba(0, 0, 0, 0.2);
  padding: 1.2rem;
  border-radius: 0.75rem;
}

code {
  background: rgba(255, 255, 255, 0.15);
  padding: 0.1rem 0.25rem;
  border-radius: 0.35rem;
  font-family: "JetBrains Mono", Consolas, monospace;
  word-break: break-word;
}

code.hash {
  display: inline-block;
  max-width: 100%;
  word-break: break-all;
  overflow-wrap: anywhere;
}

.link-btn,
.primary-btn {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
}

.link-btn {
  background: #fff;
  color: #0c1f45;
}

.primary-btn {
  background: var(--accent);
  color: #fff;
}

.support-note {
  margin: 0;
  font-size: 0.95rem;
  opacity: 0.85;
}

.guides-header p {
  color: var(--muted);
  margin-top: 0.25rem;
}

.guide-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.guide-card {
  background: var(--card);
  border-radius: 1rem;
  padding: 1.5rem;
  border: 2px solid transparent;
  box-shadow: 0 20px 45px rgba(15, 18, 42, 0.12);
  transition: transform 0.25s ease, border-color 0.25s ease;
  cursor: pointer;
}

.guide-card.active {
  border-color: var(--accent);
  transform: translateY(-6px);
}

.guide-card h3 {
  margin-top: 0;
}

.guide-card ol {
  padding-left: 1.25rem;
}

.guide-card .note {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 1rem;
}

@media (max-width: 600px) {
  .guide-card {
    padding: 1rem;
  }
}