:root {
  --gp-blue: #0D62B2;
  --gp-blue-dark: #094680;
  --gp-ink: #14181c;
  --gp-panel: #1b2127;
  --gp-panel-2: #232a31;
  --gp-border: #333c44;
  --gp-text: #e9edf1;
  --gp-muted: #8b96a1;
  --gp-amber: #e0a030;
  --gp-red: #ff6b6b;
  --gp-green: #3bbf7a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--gp-ink);
  color: var(--gp-text);
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Helvetica, Arial, sans-serif;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: #0f1216;
  border-bottom: 3px solid var(--gp-blue);
  flex-wrap: wrap;
  gap: 12px;
}
.site-header .brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.site-header .brand img { height: 36px; display: block; }
.site-header .brand .divider { width: 1px; height: 28px; background: var(--gp-border); }
.site-header .brand .product-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gp-text);
  letter-spacing: 0.2px;
}
.site-header .brand .product-sub {
  font-size: 0.68rem;
  color: var(--gp-muted);
  margin-top: 1px;
}
.site-header nav { display: flex; gap: 8px; }
.site-header nav a {
  color: var(--gp-muted);
  text-decoration: none;
  font-size: 0.8rem;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: all .15s;
}
.site-header nav a.active, .site-header nav a:hover {
  color: #fff;
  background: var(--gp-blue);
  border-color: var(--gp-blue);
}
.trial-badge {
  font-size: 0.65rem;
  background: rgba(224,160,48,0.15);
  color: var(--gp-amber);
  border: 1px solid rgba(224,160,48,0.4);
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

.advisory-banner {
  background: rgba(224,160,48,0.12);
  border-bottom: 1px solid rgba(224,160,48,0.3);
  color: #e0a030;
  font-size: 0.75rem;
  text-align: center;
  padding: 8px 16px;
  line-height: 1.5;
}
.advisory-banner b { color: #f0c060; }

main { max-width: 1080px; margin: 0 auto; padding: 24px 20px 60px; }

.page-title { font-size: 1.4rem; font-weight: 700; margin: 4px 0 2px; }
.page-subtitle { color: var(--gp-muted); font-size: 0.85rem; margin: 0 0 20px; }

.aircraft-tabs {
  display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: wrap;
}
.aircraft-tabs a {
  padding: 8px 18px; border-radius: 8px; border: 1px solid var(--gp-border);
  color: var(--gp-muted); text-decoration: none; font-size: 0.82rem; font-weight: 600;
}
.aircraft-tabs a.active { background: var(--gp-blue); border-color: var(--gp-blue); color: #fff; }
.aircraft-tabs a.disabled { opacity: 0.4; cursor: not-allowed; }

site-footer, footer.site-footer {
  border-top: 1px solid var(--gp-border);
  padding: 20px 28px 32px;
  font-size: 0.7rem;
  color: var(--gp-muted);
  line-height: 1.7;
  max-width: 1080px;
  margin: 0 auto;
}
footer.site-footer b { color: var(--gp-text); }
footer.site-footer .rev-tag {
  display: inline-block; margin-top: 8px; font-family: monospace; font-size: 0.68rem;
  color: var(--gp-muted); background: var(--gp-panel-2); padding: 3px 8px; border-radius: 4px;
}