:root {
  --gh-bg: #f5f7fb;
  --gh-surface: #ffffff;
  --gh-text: #172033;
  --gh-muted: #667085;
  --gh-border: #d9e2ec;

  --gh-platform-primary: #12324a;
  --gh-platform-nav: #12324a;

  --gh-tenant-primary: #15b8a6;
  --gh-tenant-secondary: #d7b24d;

  --gh-radius: 18px;
  --gh-shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--gh-bg);
  color: var(--gh-text);
}

.gh-shell {
  min-height: 100vh;
}

.gh-topbar {
  background: var(--gh-platform-nav);
  color: white;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.gh-brand {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: .02em;
}

.gh-version {
  color: rgba(255,255,255,.72);
  font-size: .9rem;
}

.gh-page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 42px 24px;
}

.gh-hero {
  background: linear-gradient(135deg, var(--gh-surface), #edf7f6);
  border: 1px solid var(--gh-border);
  border-radius: var(--gh-radius);
  box-shadow: var(--gh-shadow);
  padding: 34px;
}

.gh-eyebrow {
  color: var(--gh-tenant-primary);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .78rem;
}

.gh-title {
  margin: 10px 0 10px;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1;
}

.gh-subtitle {
  color: var(--gh-muted);
  font-size: 1.1rem;
  max-width: 720px;
}

.gh-grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}

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

.gh-card h3 {
  margin: 0 0 8px;
}

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

.gh-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 11px 18px;
  text-decoration: none;
  font-weight: 800;
  border: 0;
}

.gh-btn-primary {
  background: var(--gh-platform-primary);
  color: white;
}

.gh-btn-secondary {
  background: var(--gh-tenant-primary);
  color: white;
}