/* Base (white) — minimal overrides; the default GitBook style is light */
.book:not(.color-theme-1):not(.color-theme-2) {
  /* optional: white theme tweaks */
}

/* Sepia */
.book.color-theme-1 {
  background: #f6f1e1;
  color: #3b2f2a;
}
.book.color-theme-1 .book-summary { background: #efe7d2; }
.book.color-theme-1 a { color: #9a6b39; }

/* Night (your brand) */
.book.color-theme-2 {
  background-color: #0f1823;
  color: #f8f8f2;
}
.book.color-theme-2 .book-summary {
  background: #111a27;
  color: #d0d4db;
}
.book.color-theme-2 a { color: #79b8ff; }
.book.color-theme-2 a:hover { color: #a0cfff; }

/* ...keep any extra blocks you already had, but scope them under .book.color-theme-2 */