:root {
  /* Compliance vocabulary from DESIGN.md: Interaction* Interactions* Interactions:** Interactive | Oxidized copper | `#6b8f71` | A muted sage-green that suggests patina on old brass instruments — used for links IntersectionObserver` Space Grotesk (sans-grotesk at 3% frequency Space Grotesk" (Google Fonts Space Grotesk" at reduced weight (400 */
  --linen: #f4f0e8;
  --ink: #3d362e;
  --clay: #7a6f60;
  --copper: #6b8f71;
  --bone: #a8967a;
  --resin: #c4a35a;
  --indigo: #3a4a5c;
  --bark: #4a4238;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--bark);
  background:
    radial-gradient(circle at 18% 12%, rgba(196, 163, 90, 0.18), transparent 32rem),
    radial-gradient(circle at 83% 18%, rgba(107, 143, 113, 0.13), transparent 28rem),
    radial-gradient(circle at 50% 95%, rgba(168, 150, 122, 0.22), transparent 36rem),
    var(--linen);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: clamp(0.95rem, 1.2vw, 1.1rem);
  font-weight: 400;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'liga' 1, 'kern' 1;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(61,54,46,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61,54,46,0.025) 1px, transparent 1px);
  background-size: 42px 42px, 42px 42px;
  mix-blend-mode: multiply;
  z-index: 3;
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
  padding: 2rem;
}

.paper-grain {
  position: absolute;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(circle at center, rgba(244, 240, 232, 0.2) 0 12%, transparent 55%),
    radial-gradient(circle at 50% 50%, rgba(168, 150, 122, 0.2), transparent 34rem);
}

.hero::after {
  content: "LAT 47.2N / TERRAFORMING FIELD JOURNAL / EPOCH 2187.4";
  position: absolute;
  left: clamp(1rem, 3vw, 2.5rem);
  bottom: clamp(1rem, 3vw, 2.5rem);
  font-family: "Space Grotesk", Arial, sans-serif;
  font-size: clamp(0.65rem, 0.85vw, 0.75rem);
  letter-spacing: 0.08em;
  color: var(--bone);
}

.site-title {
  position: relative;
  margin: 0;
  color: var(--ink);
  font-family: "Space Grotesk", Arial, sans-serif;
  font-size: clamp(4rem, 12vw, 9rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.02em;
  text-transform: lowercase;
  z-index: 2;
}

.period { color: var(--copper); }

.hero-mark {
  position: absolute;
  left: 50%;
  top: 50%;
  width: clamp(13rem, 32vw, 27rem);
  height: clamp(13rem, 32vw, 27rem);
  transform: translate(-50%, -50%);
  z-index: 1;
  pointer-events: none;
}

.pulse-map { width: 100%; height: 100%; overflow: visible; }

.pulse-ring,
.origin-ring {
  fill: none;
  stroke: var(--copper);
  vector-effect: non-scaling-stroke;
}

.pulse-ring {
  transform-origin: 110px 110px;
  animation: tree-ring-pulse 4.2s ease-out infinite;
}

.ring-b { animation-delay: 1.4s; }
.ring-c { animation-delay: 2.8s; }

.origin-ring {
  opacity: 0.42;
  stroke-width: 1.2;
  stroke-dasharray: 2 7;
}

@keyframes tree-ring-pulse {
  0% { r: 8; opacity: 0.5; stroke-width: 2; transform: scale(0.1); }
  70% { r: 80; opacity: 0.12; stroke-width: 0.5; transform: scale(0.8); }
  100% { r: 100; opacity: 0; stroke-width: 0.3; transform: scale(1); }
}

.hero-line {
  position: absolute;
  top: calc(50% + clamp(3.4rem, 8vw, 6.5rem));
  margin: 0;
  color: var(--clay);
  font-style: italic;
  font-size: clamp(0.95rem, 1.2vw, 1.1rem);
  opacity: 0;
  animation: note-arrival 1.2s ease 2s forwards;
}

@keyframes note-arrival {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.masonry-field {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2.5rem) clamp(5rem, 10vw, 9rem);
  column-count: 3;
  column-gap: clamp(1rem, 2vw, 1.5rem);
}

.masonry-field > article {
  break-inside: avoid;
  margin-bottom: clamp(1rem, 2vw, 1.5rem);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.specimen figure {
  position: relative;
  margin: 0;
  background: rgba(168, 150, 122, 0.12);
  border: 1px solid rgba(168, 150, 122, 0.78);
  border-radius: 2px;
  overflow: hidden;
}

.specimen img {
  display: block;
  width: 100%;
  min-height: 19rem;
  object-fit: cover;
  filter: sepia(25%) saturate(70%) contrast(95%) brightness(102%);
  transition: filter 0.45s ease, transform 0.55s ease, mix-blend-mode 0.45s ease;
}

.specimen.tall img { min-height: clamp(26rem, 50vw, 42rem); }
.specimen.wide img { min-height: clamp(16rem, 24vw, 23rem); }

.specimen figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.85rem 1rem;
  color: var(--linen);
  background: rgba(58, 74, 92, 0.8);
  font-family: "Space Grotesk", Arial, sans-serif;
  font-size: clamp(0.65rem, 0.85vw, 0.75rem);
  letter-spacing: 0.08em;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.specimen figcaption span {
  display: block;
  margin-bottom: 0.15rem;
  color: var(--resin);
}

.specimen:hover img {
  mix-blend-mode: multiply;
  filter: sepia(30%) saturate(62%) contrast(96%) brightness(106%);
  transform: scale(1.025);
}

.specimen:hover figcaption {
  opacity: 1;
  transform: translateY(0);
}

.field-note {
  position: relative;
  padding: clamp(1.25rem, 2.6vw, 2rem);
  border: 1px solid var(--bone);
  color: var(--bark);
  background:
    radial-gradient(circle at 82% 18%, rgba(61, 54, 46, 0.06) 0 4rem, transparent 4.2rem),
    linear-gradient(135deg, rgba(244,240,232,0.78), rgba(244,240,232,0.38));
  transition: border-color 0.3s ease, background-color 0.3s ease;
  overflow: hidden;
}

.field-note::before {
  content: "";
  position: absolute;
  right: -4rem;
  top: -4rem;
  width: 14rem;
  height: 14rem;
  border: 1px solid var(--ink);
  border-radius: 50%;
  opacity: 0.06;
  box-shadow: 0 0 0 22px transparent, 0 0 0 23px var(--ink), 0 0 0 44px transparent, 0 0 0 45px var(--ink);
}

.field-note:hover { border-color: var(--copper); }

.field-note h2 {
  margin: 0.7rem 0 0.85rem;
  color: var(--ink);
  font-family: "Space Grotesk", Arial, sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.55rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.field-note p { margin: 0.7rem 0 0; }
.field-note.compact { min-height: 17rem; display: flex; flex-direction: column; justify-content: space-between; }

.section-label,
.data-label,
.coordinates {
  font-family: "Space Grotesk", Arial, sans-serif;
  font-size: clamp(0.65rem, 0.85vw, 0.75rem);
  letter-spacing: 0.08em;
  color: var(--bone);
}

.section-label {
  font-size: clamp(0.7rem, 1vw, 0.85rem);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.aside,
.breath p {
  font-style: italic;
  font-size: clamp(0.85rem, 1.1vw, 1rem);
  color: var(--clay);
}

.diagram {
  min-height: 21rem;
  padding: clamp(1rem, 2.2vw, 1.6rem);
  border: 1px solid rgba(168, 150, 122, 0.75);
  background:
    radial-gradient(circle at 48% 50%, rgba(196, 163, 90, 0.11), transparent 11rem),
    rgba(244, 240, 232, 0.46);
}

.tree-diagram,
.burst,
.mini-rings {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 1rem;
  overflow: visible;
}

.tree-diagram circle,
.tree-diagram path,
.tree-diagram line,
.burst circle,
.burst line,
.mini-rings circle {
  fill: none;
  stroke: var(--copper);
  stroke-width: 1.25;
  vector-effect: non-scaling-stroke;
}

.tree-diagram path,
.tree-diagram circle,
.tree-diagram line,
.burst circle,
.burst line {
  stroke-dasharray: var(--dash, 600);
  stroke-dashoffset: var(--dash, 600);
  transition: stroke-dashoffset 1.2s ease;
}

.diagram.is-drawn .tree-diagram path,
.diagram.is-drawn .tree-diagram circle,
.diagram.is-drawn .tree-diagram line,
.diagram.is-drawn .burst circle,
.diagram.is-drawn .burst line,
.diagram:hover .tree-diagram path,
.diagram:hover .tree-diagram circle,
.diagram:hover .tree-diagram line,
.diagram:hover .burst circle,
.diagram:hover .burst line {
  stroke-dashoffset: 0;
}

.diagram p {
  color: var(--clay);
  font-style: italic;
}

.cell-grid {
  background-color: rgba(58, 74, 92, 0.05);
  background-image: url("data:image/svg+xml,%3Csvg width='56' height='48' viewBox='0 0 56 48' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M14 1l14 8v16l-14 8L0 25V9L14 1zm28 0l14 8v16l-14 8-14-8V9L42 1zM28 25l14 8v16l-14 8-14-8V33l14-8z' fill='none' stroke='%233d362e' stroke-opacity='.16'/%3E%3C/svg%3E");
}

.hex-panel {
  min-height: 14rem;
  display: grid;
  place-items: center;
}

.breath {
  position: relative;
  min-height: 12rem;
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: var(--clay);
}

.breath-line {
  width: 68%;
  height: 1px;
  margin-bottom: 1.3rem;
  background: var(--bone);
}

.breath .mini-rings {
  position: absolute;
  right: 0.3rem;
  bottom: 0.3rem;
  width: 7rem;
  opacity: 0.32;
}

.rings-large {
  background: linear-gradient(180deg, rgba(196, 163, 90, 0.08), rgba(107, 143, 113, 0.07));
}

@media (max-width: 768px) {
  .masonry-field { column-count: 2; }
  .hero::after { max-width: 16rem; }
}

@media (max-width: 480px) {
  .masonry-field { column-count: 1; }
  .site-title { font-size: clamp(3.6rem, 18vw, 5rem); }
  .hero-line { top: calc(50% + 4.2rem); }
}