:root {
  --sand: #100c08;
  --mesa: #1a0e08;
}

.chapter-header {
  background:
    radial-gradient(ellipse 100% 50% at 50% 100%, #4a2810 0%, transparent 65%),
    radial-gradient(ellipse 80% 60% at 80% 60%, #3a2018 0%, transparent 60%),
    #321a0e;
}

.chapter-header::after {
  background: radial-gradient(ellipse 80% 100% at 50% 100%, transparent 30%, rgba(12,8,5,0.45) 100%);
}

/* Desert title glow is rust-toned */
.chapter-title {
  color: var(--pale);
  text-shadow: 0 0 60px rgba(139,58,42,0.2), 0 2px 8px rgba(0,0,0,0.7);
}