:root {
  /* design parser tokens: IntersectionObserver updates states. */
  --rice: #F4EFE4;
  --cotton: #DDD2BF;
  --marble: #B9B2A4;
  --sage: #6F7B5C;
  --rose: #9A6B5E;
  --ink: #2D2923;
  --dusk: #3E4936;
  --cool: #D9D5C8;
  --scroll: 0;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--rice);
  color: var(--ink);
  font-family: "Cormorant Garamond", serif;
  overflow-x: hidden;
}

button { font: inherit; color: inherit; }

.paper-stage {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 75% 15%, rgba(221, 210, 191, 0.86), transparent 28%),
    linear-gradient(180deg, var(--rice) 0%, var(--rice) 68%, var(--cool) 100%);
  z-index: -4;
}

.grain {
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(45, 41, 35, 0.06) 0 1px, transparent 1px),
    radial-gradient(circle at 80% 60%, rgba(62, 73, 54, 0.045) 0 1px, transparent 1px);
  background-size: 34px 34px, 51px 51px;
  mix-blend-mode: multiply;
}

.fixed-proof {
  position: absolute;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(111, 123, 92, 0.32);
  transform: rotate(-90deg);
}

.proof-one { left: 2.1rem; top: 42%; }
.proof-two { right: -2.8rem; top: 56%; transform: rotate(90deg); }

.narrative { position: relative; }

.clearing {
  min-height: 100vh;
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  padding: clamp(2rem, 5vw, 5.5rem);
  isolation: isolate;
  overflow: hidden;
}

.clearing::before {
  content: "";
  position: absolute;
  inset: 1.2rem;
  border: 1px solid rgba(185, 178, 164, 0.22);
  z-index: -2;
}

.section-count,
.eyebrow,
.plant-label,
.proof-lines text {
  font-family: "Noto Sans JP", sans-serif;
  font-weight: 300;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-count {
  position: absolute;
  top: clamp(1.5rem, 4vw, 3.2rem);
  left: clamp(1.5rem, 5vw, 5.5rem);
  font-size: 0.68rem;
  color: rgba(45, 41, 35, 0.48);
  z-index: 5;
}

.eyebrow {
  margin: 0 0 1.1rem;
  font-size: 0.68rem;
  color: var(--sage);
}

h1, h2, .card-word {
  font-family: "Libre Baskerville", serif;
  font-weight: 400;
}

h1 {
  margin: 0;
  font-size: clamp(3.6rem, 10vw, 9rem);
  line-height: 0.9;
  letter-spacing: -0.045em;
}

h2 {
  margin: 0;
  font-size: clamp(2.2rem, 5.4vw, 5.8rem);
  line-height: 1.03;
  letter-spacing: -0.038em;
}

.body-copy,
.maxim,
.closing {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  line-height: 1.55;
}

.parallax { will-change: transform; }

.hero-copy {
  grid-column: 2 / span 8;
  align-self: end;
  padding-bottom: 8vh;
  z-index: 3;
}

.maxim {
  width: min(41rem, 90vw);
  margin: 1.6rem 0 0;
  color: rgba(45, 41, 35, 0.78);
}

.marble-horizon {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 3vh;
  height: 27vh;
  background:
    radial-gradient(ellipse at 42% 40%, rgba(185, 178, 164, 0.36), transparent 43%),
    linear-gradient(105deg, transparent 14%, rgba(154, 107, 94, 0.08) 15%, transparent 16% 36%, rgba(62, 73, 54, 0.08) 37%, transparent 38%),
    var(--cotton);
  border-radius: 52% 48% 0 0 / 54% 54% 0 0;
  opacity: 0.72;
  z-index: -1;
}

.botanical {
  position: absolute;
  fill: none;
  stroke: var(--sage);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.76;
  z-index: 1;
}

.botanical text,
.plant-label {
  fill: rgba(111, 123, 92, 0.72);
  stroke: none;
  font-size: 13px;
}

.botanical-hero { width: min(54vw, 650px); right: 5vw; bottom: -5vh; }
.botanical-margin { width: min(33vw, 390px); right: 7vw; bottom: 4vh; opacity: 0.54; }
.botanical-dusk { width: min(70vw, 820px); right: -6vw; bottom: -4vh; opacity: 0.2; stroke: var(--rice); }

.draw-botanical path,
.draw-botanical circle {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 2.8s ease, opacity 1.2s ease;
}

.draw-botanical text { opacity: 0; transition: opacity 1.2s ease 1.6s; }
.active .draw-botanical path,
.active .draw-botanical circle,
.draw-botanical.drawn path,
.draw-botanical.drawn circle { stroke-dashoffset: 0; }
.active .draw-botanical text,
.draw-botanical.drawn text { opacity: 1; }

.margins { background: rgba(221, 210, 191, 0.32); }

.margin-panel {
  grid-column: 2 / span 5;
  align-self: center;
  padding: clamp(1.6rem, 4vw, 4rem);
  background: rgba(244, 239, 228, 0.52);
  border: 1px solid rgba(185, 178, 164, 0.38);
  box-shadow: 0 24px 80px rgba(45, 41, 35, 0.06);
}

.body-copy { margin: 2rem 0 0; color: rgba(45, 41, 35, 0.78); }

.proof-lines {
  position: absolute;
  inset: 16vh 5vw auto auto;
  width: min(58vw, 920px);
  height: 55vh;
  fill: none;
  stroke: rgba(111, 123, 92, 0.32);
  stroke-width: 1;
  z-index: -1;
}

.proof-lines text { fill: rgba(154, 107, 94, 0.58); stroke: none; font-size: 12px; }

.specimens { align-content: center; }

.specimen-heading {
  grid-column: 2 / span 5;
  align-self: center;
}

.card-field {
  grid-column: 7 / span 5;
  align-self: center;
  min-height: 66vh;
  position: relative;
  perspective: 1200px;
}

.specimen-card {
  position: absolute;
  width: clamp(12rem, 18vw, 17rem);
  height: clamp(17rem, 26vw, 23rem);
  perspective: 1100px;
  cursor: pointer;
}

.specimen-card:nth-child(1) { left: 2%; top: 8%; transform: rotate(-6deg); }
.specimen-card:nth-child(2) { right: 10%; top: 0; transform: rotate(4deg); }
.specimen-card:nth-child(3) { left: 25%; bottom: 2%; transform: rotate(2deg); }

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 820ms cubic-bezier(0.22, 0.61, 0.36, 1), box-shadow 820ms ease;
  transform-style: preserve-3d;
  box-shadow: 0 18px 45px rgba(45, 41, 35, 0.12);
}

.specimen-card.flipped .card-inner,
.specimen-card:hover .card-inner { transform: rotateY(180deg) translateY(-5px); box-shadow: 0 28px 55px rgba(45, 41, 35, 0.16); }

.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 2px;
  border: 1px solid rgba(185, 178, 164, 0.62);
  background:
    linear-gradient(110deg, transparent 0 46%, rgba(185, 178, 164, 0.13) 47%, transparent 48%),
    var(--cotton);
  display: grid;
  place-items: center;
  padding: 1.3rem;
}

.card-front::after,
.card-back::after {
  content: "ronri / specimen";
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 0.56rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(45, 41, 35, 0.42);
}

.pin-mark { position: absolute; top: 0.8rem; right: 0.9rem; color: var(--rose); font-size: 0.82rem; }
.card-word { font-size: clamp(1.7rem, 3vw, 2.6rem); color: var(--ink); z-index: 2; }
.card-plant { position: absolute; width: 70%; height: 55%; bottom: 2.3rem; stroke: rgba(111, 123, 92, 0.55); fill: none; stroke-width: 1.6; }
.card-back { transform: rotateY(180deg); background: linear-gradient(145deg, rgba(154, 107, 94, 0.16), transparent 52%), var(--cotton); }
.card-back p { margin: 0; font-size: 1.35rem; line-height: 1.42; color: var(--ink); }

.marble { background: rgba(221, 210, 191, 0.26); align-content: center; }

.column-shadow {
  position: absolute;
  left: 8vw;
  bottom: 3vh;
  width: min(36vw, 420px);
  height: min(36vw, 420px);
  border-radius: 50%;
  background:
    radial-gradient(circle at 45% 40%, rgba(244, 239, 228, 0.85), rgba(185, 178, 164, 0.35) 70%),
    linear-gradient(60deg, transparent 45%, rgba(62, 73, 54, 0.08) 46%, transparent 49%);
  opacity: 0.7;
}

.marble-oval {
  grid-column: 2 / span 5;
  align-self: center;
  justify-self: center;
  width: clamp(16rem, 35vw, 34rem);
  aspect-ratio: 1.65 / 1;
  border-radius: 50%;
  border: 1px solid rgba(185, 178, 164, 0.76);
  background:
    radial-gradient(ellipse at 35% 30%, rgba(244, 239, 228, 0.98), rgba(221, 210, 191, 0.88) 62%, rgba(185, 178, 164, 0.45)),
    linear-gradient(112deg, transparent 0 31%, rgba(154, 107, 94, 0.12) 32%, transparent 34% 58%, rgba(62, 73, 54, 0.09) 59%, transparent 61%);
  box-shadow: inset 0 0 42px rgba(185, 178, 164, 0.3), 0 30px 70px rgba(45, 41, 35, 0.12);
  cursor: pointer;
  transition: transform 600ms ease, box-shadow 600ms ease;
}

.marble-oval:hover { transform: translateY(-6px); box-shadow: inset 0 0 42px rgba(185, 178, 164, 0.34), 0 38px 90px rgba(45, 41, 35, 0.16); }
.marble-oval span { font-family: "Libre Baskerville", serif; font-size: clamp(1.6rem, 4vw, 4.6rem); letter-spacing: -0.04em; }
.marble-oval.changed span { color: var(--rose); }

.marble-copy { grid-column: 8 / span 4; align-self: center; }

.dusk {
  background: linear-gradient(180deg, rgba(217, 213, 200, 0.72), var(--dusk));
  color: var(--rice);
}

.dusk::before { border-color: rgba(244, 239, 228, 0.14); }
.dusk .section-count,
.dusk .eyebrow { color: rgba(244, 239, 228, 0.62); }
.dusk-copy { grid-column: 3 / span 7; align-self: center; z-index: 3; }
.dusk h2 { color: var(--rice); }
.closing { margin-top: 1.4rem; color: rgba(244, 239, 228, 0.72); }

.reveal-line {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 1s ease, transform 1s ease;
}

.active .reveal-line { opacity: 1; transform: translateY(0); }

@media (max-width: 850px) {
  .clearing { display: block; padding: 5.5rem 1.4rem 3rem; }
  .clearing::before { inset: 0.75rem; }
  .hero-copy { padding-top: 50vh; }
  .botanical-hero { width: 92vw; right: -15vw; top: 12vh; bottom: auto; }
  .margin-panel, .specimen-heading, .marble-copy, .dusk-copy { width: 100%; padding: 1.2rem; }
  .proof-lines { width: 110vw; left: -8vw; right: auto; top: 34vh; }
  .botanical-margin { width: 68vw; right: -20vw; bottom: 0; }
  .card-field { min-height: 78vh; margin-top: 2rem; }
  .specimen-card { width: 12rem; height: 17rem; }
  .specimen-card:nth-child(1) { left: 0; top: 0; }
  .specimen-card:nth-child(2) { right: 0; top: 13rem; }
  .specimen-card:nth-child(3) { left: 12%; bottom: 0; }
  .marble-oval { margin: 10vh auto 3rem; display: block; }
  .column-shadow { width: 70vw; height: 70vw; left: -20vw; }
  .botanical-dusk { width: 125vw; right: -45vw; }
}