:root {
  --paper: #f3f0e9; --paper-strong: #e8e3d9; --ink: #17201d; --muted: #68716c;
  --line: rgba(23, 32, 29, .14); --green: #0c5a46; --green-soft: #dcebe4;
  --white: #fffefa; --shadow: 0 30px 90px rgba(26,38,32,.13);
  font-family: "DM Sans", system-ui, sans-serif; color: var(--ink); background: var(--paper);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--paper); -webkit-font-smoothing: antialiased; }
button, a { color: inherit; font: inherit; -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { text-decoration: none; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 10px 14px; background: var(--ink); color: white; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.site-header { height: 78px; padding: 0 clamp(18px,5vw,72px); display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; gap: 10px; align-items: center; }
.brand-mark { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; background: var(--ink); color: var(--paper); font: 700 11px/1 Manrope,sans-serif; letter-spacing: .07em; }
.brand strong, .brand small { display: block; }
.brand strong { font: 700 13px/1.25 Manrope,sans-serif; }
.brand small { color: var(--muted); font-size: 11px; margin-top: 2px; }
.header-link { font-size: 13px; border-bottom: 1px solid currentColor; padding-bottom: 2px; }
.explorer { min-height: calc(100svh - 78px); display: grid; grid-template-columns: minmax(420px,.9fr) minmax(520px,1.1fr); }
.map-panel { min-width: 0; padding: clamp(34px,5vw,70px); background: var(--paper); border-right: 1px solid var(--line); }
.intro-copy { max-width: 590px; }
.eyebrow { display: flex; align-items: center; gap: 9px; margin: 0 0 14px; color: var(--green); font: 700 11px/1.2 Manrope,sans-serif; letter-spacing: .13em; }
.eyebrow span { width: 30px; height: 1px; background: currentColor; }
h1,h2,h3,p { margin-top: 0; }
h1,h2,h3 { font-family: Manrope,sans-serif; }
h1 { margin: 0 0 16px; font-size: clamp(48px,6vw,82px); line-height: .92; letter-spacing: -.06em; }
h1 em { color: var(--green); font-family: Georgia,serif; font-weight: 400; }
.intro-copy > p:last-child { max-width: 520px; color: var(--muted); font-size: 16px; line-height: 1.6; }
.body-map { position: relative; width: min(100%,500px); aspect-ratio: 2/3; margin: 28px auto 18px; overflow: hidden; border-radius: 8px; background: linear-gradient(145deg,#e6e2d9,#f8f6f0); box-shadow: inset 0 0 0 1px rgba(23,32,29,.08); }
.body-map::after { content:""; position:absolute; inset:0; background: radial-gradient(circle at 50% 48%,transparent 35%,rgba(23,32,29,.045)); pointer-events:none; }
.body-map > img { width:100%; height:100%; object-fit:cover; display:block; }
.view-label { position:absolute; z-index:2; top:14px; color:var(--muted); font:700 9px/1 Manrope,sans-serif; letter-spacing:.18em; }
.front-label { left:24%; } .back-label { right:23%; }
.hotspot { position:absolute; z-index:4; left:var(--x); top:var(--y); width:22px; height:22px; padding:0; border:1px solid rgba(255,255,255,.8); border-radius:50%; background:rgba(12,90,70,.18); transform:translate(-50%,-50%); box-shadow:0 0 0 6px rgba(12,90,70,.08); transition:.22s ease; }
.hotspot::after { content:""; position:absolute; inset:6px; border-radius:50%; background:var(--green); }
.hotspot span { position:absolute; left:calc(100% + 10px); top:50%; padding:5px 7px; border-radius:3px; color:white; background:rgba(23,32,29,.9); font-size:10px; font-weight:700; white-space:nowrap; transform:translateY(-50%); opacity:0; pointer-events:none; transition:.2s ease; }
.hotspot.back span { left:auto; right:calc(100% + 10px); }
.hotspot:hover,.hotspot:focus-visible,.hotspot.active { width:32px; height:32px; background:rgba(12,90,70,.32); box-shadow:0 0 0 10px rgba(12,90,70,.1); outline:none; }
.hotspot:hover span,.hotspot:focus-visible span,.hotspot.active span { opacity:1; }
.region-rail { display:flex; gap:7px; max-width:620px; overflow-x:auto; padding:3px 0 8px; scrollbar-width:none; }
.region-rail::-webkit-scrollbar { display:none; }
.region-rail button { flex:0 0 auto; padding:9px 12px; border:1px solid var(--line); border-radius:99px; background:transparent; color:var(--muted); font-size:12px; }
.region-rail button.active { color:var(--white); background:var(--green); border-color:var(--green); }
.detail-panel { min-width:0; padding:clamp(34px,5vw,72px); background:var(--ink); color:var(--paper); }
.detail-topline { display:flex; justify-content:space-between; gap:20px; padding-bottom:15px; border-bottom:1px solid rgba(255,255,255,.15); color:#aeb5b1; font:700 10px/1 Manrope,sans-serif; letter-spacing:.13em; }
.region-heading { padding:38px 0 28px; }
.region-heading > p:first-child { margin-bottom:12px; color:#91c7b1; font:700 10px/1 Manrope,sans-serif; letter-spacing:.14em; }
.region-heading h2 { margin-bottom:14px; font-size:clamp(42px,6vw,76px); line-height:.95; letter-spacing:-.055em; }
.region-heading > p:last-child { max-width:720px; margin:0; color:#c4cac6; font-size:17px; line-height:1.6; }
.anatomy-visual { position:relative; height:320px; overflow:hidden; border-radius:6px; background:#e5e1d8; }
.anatomy-visual::after { content:""; position:absolute; inset:0; background:linear-gradient(90deg,rgba(23,32,29,.08),transparent 40%,rgba(23,32,29,.12)); pointer-events:none; }
.anatomy-visual img { position:absolute; top:0; left:0; width:100%; height:auto; max-width:none; display:block; transform:translateY(var(--image-shift,0)); filter:saturate(.72) contrast(1.04); }
.focus-ring { position:absolute; z-index:2; left:var(--ring-x); top:var(--ring-y); width:76px; aspect-ratio:1; border:1.5px solid var(--green); border-radius:50%; transform:translate(-50%,-50%); box-shadow:0 0 0 999px rgba(243,240,233,.54),0 0 0 10px rgba(12,90,70,.12); }
.structure-labels { position:absolute; z-index:3; inset:16px; display:flex; flex-direction:column; align-items:flex-end; justify-content:center; gap:8px; pointer-events:none; }
.structure-labels span { min-width:148px; padding:8px 10px; color:var(--ink); background:rgba(255,254,250,.91); border-left:2px solid var(--green); box-shadow:0 8px 24px rgba(23,32,29,.08); font-size:12px; font-weight:700; transform:translateX(calc((3 - var(--i)) * 4px)); }
.facts-grid { display:grid; margin-top:30px; border-top:1px solid rgba(255,255,255,.16); }
.facts-grid article { display:grid; grid-template-columns:42px 1fr; gap:12px; padding:22px 0; border-bottom:1px solid rgba(255,255,255,.16); }
.fact-number { color:#83bda5; font:700 10px/1 Manrope,sans-serif; }
.facts-grid h3 { margin:0 0 7px; font-size:17px; letter-spacing:-.02em; }
.facts-grid p { margin:0; color:#aeb5b1; font-size:15px; line-height:1.6; }
.did-you-know { background:rgba(145,199,177,.055); }
.related { padding:28px 0; }
.related > span { display:block; margin-bottom:12px; color:#83bda5; font:700 10px/1 Manrope,sans-serif; letter-spacing:.13em; }
.related div { display:flex; flex-wrap:wrap; gap:8px; }
.related a { display:flex; align-items:center; gap:18px; padding:10px 12px; border:1px solid rgba(255,255,255,.2); border-radius:99px; color:#d6dad7; font-size:12px; transition:.2s ease; }
.related a:hover { color:var(--ink); background:var(--paper); border-color:var(--paper); }
.detail-navigation { display:grid; grid-template-columns:1fr 1fr; gap:9px; }
.detail-navigation button { min-height:68px; padding:12px 16px; display:flex; align-items:center; gap:15px; border:1px solid rgba(255,255,255,.2); border-radius:4px; background:transparent; color:var(--paper); text-align:left; }
.detail-navigation button:last-child { justify-content:flex-end; text-align:right; background:var(--paper); color:var(--ink); border-color:var(--paper); }
.detail-navigation small,.detail-navigation strong { display:block; }
.detail-navigation small { margin-bottom:3px; color:#929995; font-size:10px; }
.detail-navigation strong { font-size:13px; }
.closing-note { display:grid; grid-template-columns:1fr 1fr; gap:8vw; padding:clamp(64px,9vw,110px) 8vw; background:var(--paper); }
.closing-note h2 { margin:0; font-size:clamp(34px,5vw,64px); line-height:1.04; letter-spacing:-.05em; }
.closing-note > div:last-child { align-self:end; }
.closing-note > div:last-child p { margin-bottom:0; color:var(--muted); font-size:16px; line-height:1.65; }
footer { display:grid; grid-template-columns:.7fr 1.4fr auto; gap:3rem; align-items:end; padding:3.2rem 8vw; color:rgba(255,255,255,.65); background:#061013; }
footer div { display:grid; } footer strong { color:white; font-family:Manrope,sans-serif; } footer span,footer p { margin:0; font-size:.73rem; line-height:1.6; } footer > span { white-space:nowrap; }
@media (max-width: 1080px) { .explorer { grid-template-columns:minmax(360px,.8fr) minmax(460px,1.2fr); } .map-panel,.detail-panel { padding:36px; } }
@media (max-width: 900px) {
  .explorer { display:block; } .map-panel { border-right:0; } .detail-panel { scroll-margin-top:0; }
  .body-map { max-width:540px; } .anatomy-visual { height:min(70vw,390px); }
}
@media (max-width: 620px) {
  .site-header { height:70px; padding:0 16px; } .brand-mark { width:34px; height:34px; } .brand small { display:none; } .header-link { font-size:11px; }
  .map-panel,.detail-panel { padding:30px 16px; } h1 { font-size:clamp(48px,16vw,70px); }
  .intro-copy > p:last-child { font-size:15px; } .body-map { margin-inline:-4px; width:calc(100% + 8px); }
  .hotspot span { display:none; } .region-heading { padding-top:30px; } .region-heading > p:last-child { font-size:16px; }
  .anatomy-visual { height:310px; } .structure-labels { inset:10px; } .structure-labels span { min-width:132px; padding:7px 8px; font-size:11px; }
  .focus-ring { width:58px; } .facts-grid article { grid-template-columns:34px 1fr; } .facts-grid p { font-size:14px; }
  .detail-navigation { grid-template-columns:1fr; } .detail-navigation button:last-child { grid-row:1; }
  .closing-note { grid-template-columns:1fr; gap:32px; padding:68px 20px; }
  footer { grid-template-columns:1fr; gap:1.4rem; align-items:start; padding:38px 20px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior:auto; } *,*::before,*::after { transition-duration:.01ms !important; } }