/* The revision book sits on the deep green cloth from the approved concept. */
html { background: #0d2923; }
.parchment {
  background:
    radial-gradient(circle at 18% 13%, rgba(72, 107, 83, 0.4), transparent 34%),
    radial-gradient(circle at 83% 88%, rgba(4, 20, 17, 0.64), transparent 46%),
    repeating-linear-gradient(4deg, rgba(255,255,255,0.018) 0 1px, transparent 1px 4px),
    repeating-linear-gradient(94deg, rgba(0,0,0,0.035) 0 1px, transparent 1px 5px),
    #173c31;
}
.parchment::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.72' numOctaves='4'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.36'/%3E%3C/svg%3E");
  background-size: 180px 180px;
  mix-blend-mode: soft-light;
  opacity: 0.35;
}
.stains, .frame { display: none; }
body::after { content: ""; position: fixed; inset: 0; z-index: 4; pointer-events: none; box-shadow: inset 0 0 70px rgba(4, 16, 13, 0.72); }