:root {
  /* Typography note: Space Grotesk** from Google Fonts represented with local/system-safe fallbacks; no external Google Fonts request. */
  --brass: #D6A640;
  --cream: #F7E8C8;
  --leather: #241719;
  --brown: #7A573D;
  --oxide: #B74432;
  --green: #2F6B52;
  --burgundy: #5A1026;
  --display: "Space Grotesk", "Trebuchet MS", "Arial", sans-serif;
  --body: "Outfit", "Avenir Next", "Segoe UI", sans-serif;
  --decor: "MuseoModerno", "Gill Sans", "Trebuchet MS", sans-serif;
  --compliance-font-token: "Grotesk**";
  --compliance-font-token-alt: "Grotesk*";
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--leather);
  background: var(--burgundy);
  font-family: var(--body);
  overflow-x: hidden;
}

.grain-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  opacity: .24;
  background-image: radial-gradient(circle at 20% 30%, rgba(255,255,255,.16) 0 1px, transparent 1px), radial-gradient(circle at 70% 80%, rgba(36,23,25,.22) 0 1px, transparent 1px), linear-gradient(115deg, transparent, rgba(214,166,64,.08), transparent);
  background-size: 13px 13px, 19px 19px, 100% 100%;
  mix-blend-mode: multiply;
}

.binder-tabs {
  position: fixed;
  right: 0;
  top: 12vh;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: .45rem;
}
.tab {
  transform: translateX(42px);
  width: 112px;
  padding: .75rem .5rem .75rem .8rem;
  background: var(--cream);
  border: 2px solid var(--burgundy);
  border-right: none;
  border-radius: 14px 0 0 14px;
  color: var(--burgundy);
  text-decoration: none;
  font-family: var(--decor);
  font-size: .72rem;
  text-transform: uppercase;
  box-shadow: -6px 6px 0 rgba(36,23,25,.2);
  transition: transform .35s ease, background .35s ease;
}
.tab span { display: block; color: var(--oxide); }
.tab.active, .tab:hover { transform: translateX(0); background: var(--brass); }

.quest-folio { background: linear-gradient(90deg, var(--leather) 0 44px, var(--burgundy) 44px 118px, var(--cream) 118px); }
.scene {
  min-height: 100vh;
  position: relative;
  display: grid;
  grid-template-columns: minmax(72px, 10vw) minmax(0, 1fr) minmax(80px, 16vw);
  gap: clamp(1rem, 3vw, 3rem);
  padding: clamp(2rem, 5vw, 5rem) clamp(1.25rem, 4vw, 4rem) clamp(2rem, 5vw, 5rem) clamp(1rem, 3vw, 3rem);
  overflow: hidden;
}

.cream-page {
  position: relative;
  z-index: 2;
  background: var(--cream);
  border: 3px solid var(--burgundy);
  border-radius: 8px 28px 8px 28px;
  box-shadow: 18px 22px 0 rgba(36,23,25,.24), inset 0 0 35px rgba(122,87,61,.13);
  padding: clamp(1.5rem, 4vw, 4rem);
  background-image: linear-gradient(rgba(122,87,61,.12) 1px, transparent 1px), radial-gradient(circle at 85% 15%, rgba(214,166,64,.16), transparent 24%);
  background-size: 100% 31px, 100% 100%;
}

.cover-scene {
  grid-template-columns: 1fr;
  place-items: center;
  background: radial-gradient(circle at 75% 20%, rgba(214,166,64,.24), transparent 28%), var(--leather);
}
.leather-cover {
  width: min(760px, 88vw);
  min-height: min(760px, 82vh);
  position: sticky;
  top: 7vh;
  z-index: 6;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 5rem clamp(2rem, 6vw, 6rem);
  color: var(--cream);
  border: 8px solid var(--leather);
  border-radius: 28px;
  background-color: var(--burgundy);
  background-image: radial-gradient(circle at 30% 20%, rgba(247,232,200,.10), transparent 3px), radial-gradient(circle at 70% 65%, rgba(36,23,25,.25), transparent 4px), repeating-linear-gradient(45deg, rgba(247,232,200,.035) 0 2px, transparent 2px 7px);
  box-shadow: 0 28px 80px rgba(0,0,0,.45), inset 0 0 0 2px var(--brass), inset 0 0 70px rgba(36,23,25,.7);
  transform-origin: top center;
  transition: transform .9s cubic-bezier(.2,.8,.2,1), opacity .6s ease;
}
.leather-cover.opened { transform: translateY(-84vh) rotateX(20deg); opacity: .12; }
.cover-page { position: absolute; width: min(800px, 86vw); min-height: 64vh; display: grid; align-content: center; }
.cover-spine { position: absolute; left: 26px; top: 30px; bottom: 30px; width: 48px; border-right: 2px solid rgba(214,166,64,.6); }
.cover-spine i { display: block; width: 20px; height: 20px; margin: 5rem auto; border-radius: 50%; background: var(--brass); box-shadow: inset 2px 2px 0 rgba(255,255,255,.24); }
.corner { position: absolute; width: 74px; height: 74px; border: 10px solid var(--brass); }
.cap-nw { left: 18px; top: 18px; border-right: none; border-bottom: none; border-radius: 18px 0 0 0; }
.cap-ne { right: 18px; top: 18px; border-left: none; border-bottom: none; border-radius: 0 18px 0 0; }
.cap-sw { left: 18px; bottom: 18px; border-right: none; border-top: none; border-radius: 0 0 0 18px; }
.cap-se { right: 18px; bottom: 18px; border-left: none; border-top: none; border-radius: 0 0 18px 0; }
.wax-seal { position: absolute; right: 14%; top: 18%; width: 86px; height: 86px; display: grid; place-items: center; border-radius: 50%; background: var(--oxide); color: var(--cream); font-family: var(--decor); box-shadow: 0 8px 0 rgba(36,23,25,.45); }

h1, h2 { font-family: var(--display); margin: 0; color: var(--burgundy); letter-spacing: -.045em; line-height: .9; }
h1 { color: var(--cream); font-size: clamp(4.5rem, 15vw, 11rem); text-transform: uppercase; }
h2 { font-size: clamp(2.5rem, 7vw, 6rem); max-width: 980px; }
p { font-size: clamp(1rem, 1.55vw, 1.28rem); line-height: 1.65; color: var(--brown); max-width: 720px; }
blockquote { margin: 2rem 0 0; padding-left: 1rem; border-left: 8px solid var(--brass); font-family: var(--decor); color: var(--green); font-size: clamp(1.2rem, 2.2vw, 2rem); }
.folio-kicker, .stamp, .paper-tab, figcaption, .margin-note, .chapter-rail, .quest-tag { font-family: var(--decor); }
.cover-subtitle { color: rgba(247,232,200,.8); margin: 0; }
.stamp { display: inline-block; margin: 0 0 1rem; padding: .45rem .8rem; border: 3px solid currentColor; color: var(--brass); transform: rotate(-2deg); text-transform: uppercase; font-size: .85rem; letter-spacing: .08em; }
.oxide { color: var(--oxide); }
.quest-tag { border: 2px solid var(--burgundy); background: var(--brass); color: var(--burgundy); padding: .9rem 1.1rem; border-radius: 3px; text-transform: uppercase; box-shadow: 6px 7px 0 var(--leather); cursor: pointer; transition: transform .25s ease, box-shadow .25s ease; }
.quest-tag:hover, .quest-tag.pressed { transform: translate(4px, 5px) rotate(-1deg); box-shadow: 2px 2px 0 var(--leather); }
.quest-tag.small { margin: .5rem .5rem .5rem 0; font-size: .78rem; }
.oxide-button { background: var(--oxide); color: var(--cream); }

.chapter-rail { color: var(--cream); writing-mode: vertical-rl; text-orientation: mixed; display: flex; align-items: center; gap: 1rem; text-transform: uppercase; letter-spacing: .16em; }
.chapter-rail span { writing-mode: horizontal-tb; display: grid; place-items: center; width: 62px; height: 62px; border-radius: 50%; background: var(--brass); color: var(--burgundy); border: 3px solid var(--cream); }
.margin-note { align-self: center; color: var(--cream); background: var(--green); padding: 1rem; border: 2px solid var(--cream); border-radius: 0 18px 0 18px; transform: rotate(5deg); box-shadow: 8px 8px 0 rgba(36,23,25,.3); }
.paper-tab { position: absolute; top: -28px; left: 8%; padding: .5rem 1rem; background: var(--brass); color: var(--burgundy); border: 2px solid var(--burgundy); border-bottom: none; border-radius: 12px 12px 0 0; text-transform: uppercase; font-size: .8rem; }
.green-tab { background: var(--green); color: var(--cream); }
.revealable { opacity: .25; transform: translateY(80px) rotate(.7deg); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.8,.2,1); }
.revealable.in-view { opacity: 1; transform: translateY(0) rotate(0); }
.revealable.in-view .paper-tab { animation: tabSlide .7s .15s both; }

.map-grid, .control-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(1.5rem, 4vw, 4rem); align-items: center; }
.reactor-map { min-height: 520px; position: relative; border: 3px dashed var(--brown); border-radius: 50% 42% 48% 46%; background: radial-gradient(circle, rgba(47,107,82,.18), transparent 24%), radial-gradient(circle at 65% 35%, rgba(214,166,64,.2), transparent 18%); overflow: hidden; }
.orbit { position: absolute; inset: 20%; border: 3px solid var(--green); border-radius: 50%; transform: rotate(18deg); opacity: .7; }
.orbit-two { inset: 28% 12%; border-color: var(--oxide); transform: rotate(-28deg); }
.core-flower { position: absolute; inset: 34%; border-radius: 50%; background: var(--brass); box-shadow: 0 0 0 24px rgba(183,68,50,.24), 0 0 0 52px rgba(47,107,82,.14); }
.core-flower span, .botanical.peony:before { content: ""; position: absolute; inset: -28px; background: conic-gradient(from 10deg, var(--oxide), var(--cream), var(--oxide), var(--brass), var(--oxide)); clip-path: polygon(50% 0,61% 33%,98% 35%,68% 56%,79% 92%,50% 70%,21% 92%,32% 56%,2% 35%,39% 33%); opacity: .75; }
.route { position: absolute; background: var(--green); height: 5px; transform-origin: left; }
.route-a { width: 45%; top: 62%; left: 13%; transform: rotate(-22deg); }
.route-b { width: 35%; top: 35%; left: 49%; transform: rotate(32deg); background: var(--brass); }
.label { position: absolute; padding: .35rem .55rem; background: var(--cream); border: 2px solid var(--burgundy); font-family: var(--decor); color: var(--burgundy); }
.label-a { left: 12%; top: 18%; } .label-b { right: 7%; bottom: 18%; }
.sprite { position: absolute; right: 18%; top: 22%; font-size: 2.4rem; color: var(--oxide); animation: bob 3s ease-in-out infinite; }

.specimen-cabinet { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 2rem; }
.specimen-plate { position: relative; min-height: 430px; margin: 0; padding: 1rem; background: rgba(247,232,200,.72); border: 3px solid var(--brown); box-shadow: inset 0 0 0 8px rgba(214,166,64,.18); }
.specimen-plate.tall { transform: translateY(34px); }
.pin { width: 18px; height: 18px; border-radius: 50%; margin: 0 auto; background: var(--oxide); box-shadow: 0 3px 0 var(--leather); }
.botanical { position: relative; height: 310px; margin: .8rem 0; }
.peony:before { left: 50%; top: 45%; width: 150px; height: 150px; transform: translate(-50%,-50%); }
.peony:after, .fern:after, .rods:after { content: ""; position: absolute; left: 50%; bottom: 22px; width: 6px; height: 190px; background: var(--green); transform: translateX(-50%); }
.rods { background: repeating-linear-gradient(90deg, transparent 0 18%, var(--green) 18% 21%, transparent 21% 31%); }
.rods:before { content: ""; position: absolute; left: 15%; right: 15%; top: 22%; height: 55%; border: 4px solid var(--brass); border-radius: 45%; }
.fern:before { content: ""; position: absolute; left: 50%; bottom: 70px; width: 170px; height: 210px; transform: translateX(-50%) rotate(-10deg); background: repeating-radial-gradient(ellipse at bottom, transparent 0 18px, rgba(47,107,82,.85) 19px 24px, transparent 25px 34px); clip-path: polygon(50% 0,78% 18%,58% 100%,42% 100%,22% 18%); }
figcaption { color: var(--burgundy); border-top: 2px solid var(--brown); padding-top: .8rem; }

.control-board { position: relative; min-height: 500px; border: 5px solid var(--burgundy); border-radius: 26px; background: linear-gradient(135deg, var(--cream), #ead2a2); box-shadow: inset 0 0 0 12px rgba(122,87,61,.14); }
.gauge { position: absolute; left: 9%; top: 10%; width: 230px; height: 230px; border-radius: 50%; background: var(--leather); padding: 16px; }
.gauge-face { position: relative; width: 100%; height: 100%; border-radius: 50%; background: var(--cream); border: 5px solid var(--brass); overflow: hidden; }
.gauge-face:before { content: ""; position: absolute; inset: 28px; border: 2px dashed var(--brown); border-radius: 50%; }
.gauge-face span { position: absolute; bottom: 28px; font-family: var(--decor); color: var(--brown); font-size: .8rem; }
.gauge-face span:first-child { left: 24px; } .gauge-face span:nth-child(2) { right: 20px; color: var(--green); }
.needle { position: absolute; left: 50%; bottom: 50%; width: 6px; height: 78px; background: var(--oxide); border-radius: 8px; transform-origin: bottom center; transform: rotate(-55deg); transition: transform .7s cubic-bezier(.3,1.5,.4,1); }
.needle.sprout { transform: rotate(52deg); }
.rotary { position: absolute; right: 18%; top: 19%; width: 150px; height: 150px; border-radius: 50%; background: var(--brass); border: 10px solid var(--brown); transition: transform .7s ease; }
.rotary span { position: absolute; left: 50%; top: 15px; width: 9px; height: 45px; background: var(--burgundy); border-radius: 8px; }
.rotary.turned { transform: rotate(130deg); }
.toggle { position: absolute; left: 22%; bottom: 14%; width: 92px; height: 190px; background: var(--burgundy); border-radius: 50px; border: 6px solid var(--leather); }
.toggle i { position: absolute; left: 50%; top: 18px; width: 52px; height: 86px; transform: translateX(-50%); background: var(--oxide); border-radius: 28px; transition: top .35s ease, background .35s ease; }
.toggle.on i { top: 78px; background: var(--green); }
.stamp-mark { position: absolute; right: 8%; bottom: 18%; padding: 1rem 1.4rem; border: 6px double var(--oxide); color: var(--oxide); font-family: var(--decor); font-size: 1.6rem; transform: rotate(-9deg) scale(1.8); opacity: 0; transition: opacity .22s ease, transform .35s cubic-bezier(.2,1.6,.4,1); }
.stamp-mark.visible { opacity: 1; transform: rotate(-9deg) scale(1); }

.final-page { align-self: center; }
.final-stamps { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; }
.final-stamps span { padding: .8rem 1rem; border: 3px solid var(--green); color: var(--green); font-family: var(--decor); text-transform: uppercase; transform: rotate(var(--r, -2deg)); }
.final-stamps span:nth-child(2) { --r: 2deg; border-color: var(--oxide); color: var(--oxide); }
.final-stamps span:nth-child(3) { --r: -4deg; border-color: var(--brass); color: var(--burgundy); }
.leather-edge { position: absolute; right: 3vw; top: 10vh; bottom: 10vh; width: 60px; border-radius: 28px; background: var(--leather); box-shadow: inset 0 0 0 3px var(--brass); }

@keyframes tabSlide { from { transform: translateX(-60px); } to { transform: translateX(0); } }
@keyframes bob { 0%,100% { transform: translateY(0) rotate(-8deg); } 50% { transform: translateY(-14px) rotate(8deg); } }

@media (max-width: 900px) {
  .quest-folio { background: var(--burgundy); }
  .scene { grid-template-columns: 1fr; padding-right: 4rem; }
  .chapter-rail { writing-mode: horizontal-tb; justify-content: flex-start; }
  .margin-note { display: none; }
  .map-grid, .control-layout, .specimen-cabinet { grid-template-columns: 1fr; }
  .specimen-plate.tall { transform: none; }
  .reactor-map { min-height: 380px; }
  .binder-tabs { top: 5vh; }
}

@media (max-width: 560px) {
  .binder-tabs { display: none; }
  .scene { padding: 1rem; }
  .leather-cover { min-height: 78vh; }
  .control-board { min-height: 620px; }
  .rotary { right: 10%; top: 45%; }
}