:root {
  --ink: #070a09;
  --ink-soft: rgba(7, 10, 9, 0.65);
  --plaster: #efe9da;
  --plaster-deep: #c4bcae;
  --oxide: #3f5a4e;
  --filament: #f0a86a;
  --shadow: rgba(12, 16, 14, 0.35);
  --font-display: "Fraunces", "Palatino Linotype", Palatino, serif;
  --font-mono: "IBM Plex Mono", "Consolas", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: #1c221f;
  color: var(--ink);
  font-family: var(--font-mono);
}

body {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 1fr minmax(9rem, 14rem);
  grid-template-areas:
    "mast shelf"
    "stage shelf"
    "meta shelf";
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(240, 168, 106, 0.12), transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 80%, rgba(63, 90, 78, 0.35), transparent 50%),
    linear-gradient(160deg, #242c28 0%, #151a17 55%, #101410 100%);
}

.mast, .stage, .shelf, .meta { position: relative; z-index: 1; }

.mast {
  grid-area: mast;
  padding: 1.4rem 1.6rem 0.6rem;
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--plaster);
  line-height: 1.05;
}

.law {
  margin: 0.55rem 0 0;
  max-width: 42rem;
  color: var(--plaster-deep);
  font-size: 0.85rem;
  line-height: 1.45;
}

.pale-laws {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  max-width: 42rem;
  display: grid;
  gap: 0.35rem;
}

.pale-laws li {
  margin: 0;
  font-size: 0.72rem;
  line-height: 1.4;
  color: rgba(185, 179, 163, 0.55);
}

.pale-laws li[data-depth="1"] { color: rgba(185, 179, 163, 0.42); }
.pale-laws li[data-depth="2"] { color: rgba(185, 179, 163, 0.3); }
.pale-laws li[data-depth="3"] { color: rgba(185, 179, 163, 0.2); }

.pale-laws .pale-ver {
  font-variant-numeric: tabular-nums;
  margin-right: 0.45rem;
  opacity: 0.8;
}

.stage {
  grid-area: stage;
  padding: 0.6rem 1.6rem 1.2rem;
  display: flex;
  align-items: stretch;
  min-height: 0;
}

#field {
  width: 100%;
  height: min(70vh, 720px);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.08), transparent 40%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 3px,
      rgba(0,0,0,0.015) 3px,
      rgba(0,0,0,0.015) 4px
    ),
    var(--plaster);
  border: 0;
  box-shadow:
    0 0 0 1px rgba(0,0,0,0.25),
    0 24px 60px var(--shadow),
    inset 0 0 80px rgba(63, 90, 78, 0.08);
  pointer-events: none;
  user-select: none;
}

.shelf {
  grid-area: shelf;
  padding: 1.4rem 1rem 1rem 0.4rem;
  border-left: 1px solid rgba(215, 210, 196, 0.12);
  color: var(--plaster-deep);
}

.shelf h2 {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--plaster);
}

#fossil-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

#fossil-list figure {
  margin: 0;
  color: var(--plaster);
  font-size: 0.75rem;
}

#fossil-list img {
  display: block;
  width: 100%;
  height: auto;
  background: var(--plaster);
  box-shadow: 0 8px 20px var(--shadow);
  filter: grayscale(0.2) contrast(1.05);
  pointer-events: none;
}

#fossil-list figcaption {
  margin-top: 0.25rem;
  color: rgba(185, 179, 163, 0.85);
}

.shelf-note {
  margin: 0.4rem 0 0;
  font-size: 0.72rem;
  line-height: 1.4;
  color: rgba(185, 179, 163, 0.75);
}

.meta {
  grid-area: meta;
  padding: 0 1.6rem 1.2rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  color: rgba(185, 179, 163, 0.7);
  font-size: 0.75rem;
}

@media (max-width: 720px) {
  body {
    grid-template-columns: 1fr;
    grid-template-areas:
      "mast"
      "stage"
      "shelf"
      "meta";
  }
  .shelf {
    border-left: 0;
    border-top: 1px solid rgba(215, 210, 196, 0.12);
    padding: 1rem 1.6rem;
  }
  #fossil-list {
    grid-template-columns: repeat(auto-fill, minmax(7rem, 1fr));
  }
  #field {
    height: min(55vh, 520px);
  }
}