/* Telaah · Edisi 04 — mobile-first stylesheet
   Huruf judul Bricolage Grotesque sejak 19 Okt 2026 (keputusan pemilik, berlaku untuk semua buku Telaah).
   Bricolage tidak punya miring. Aksen (tagline, dek, kutipan) memakai Bricolage tegak;
   miring hanya untuk istilah asing dan nama ilmiah di dalam teks bacaan (Newsreader italic). */
:root {
  --red: #B3261E;
  --red-deep: #8E1B16;
  --red-dark: #5C0F0C;
  --blue: #1E4F8A;
  --blue-soft: #E6EEF8;
  --ink: #16130F;
  --ink-2: #3D3934;
  --muted: #5B5650;
  --line: #E2DED8;
  --panel: #F3F1ED;
  --paper: #FFFFFF;
  --rose: #FBE9E7;
  --gold: #8A6214;
  --plasma: #E2B45A;
  --pink: #F2A79F;
  --beat: 0.833s;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --display: "Bricolage Grotesque", "IBM Plex Sans", system-ui, sans-serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --gutter: 20px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 64px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}
img, svg, video, canvas { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; }
a { color: var(--red); }
a:hover { color: var(--red-deep); }
h1, h2, h3 { font-family: var(--display); font-weight: 650; margin: 0; letter-spacing: -0.022em; }
p { margin: 0; }
figure { margin: 0; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--ink); color: #fff; padding: 10px 14px; text-decoration: none; }
.skip:focus { top: 12px; color: #fff; }

.kicker {
  display: inline-block;
  font-size: 11px; font-weight: 600; letter-spacing: 1.6px; text-transform: uppercase;
  color: var(--red);
}
.kicker--light { color: #fff; }
.kicker--pink { color: var(--pink); }
.kicker--cyan { color: #9ED8F0; }
.note { font-size: 13px; line-height: 1.5; color: var(--muted); }
.note--light { color: rgba(255, 255, 255, .72); }
.credit { display: inline-block; font-family: var(--sans); font-style: normal; font-size: 11px; letter-spacing: .2px; color: var(--muted); opacity: .85; }

/* ------------------------------------------------------------------ buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 20px; border: 0; border-radius: 2px;
  font-size: 15px; font-weight: 600; text-decoration: none;
  transition: transform .2s var(--ease), background-color .2s, box-shadow .2s;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn--red { background: var(--red); color: #fff; }
.btn--red:hover { background: var(--red-deep); color: #fff; }
.btn--light { background: #fff; color: var(--ink); }
.btn--light:hover { background: #F6D7D3; color: var(--ink); }
.btn--block { display: flex; width: 100%; justify-content: space-between; }
.chip {
  min-height: 40px; padding: 0 14px; border-radius: 999px;
  border: 1.5px solid var(--ink); background: transparent; color: var(--ink);
  font-size: 13px; font-weight: 600;
  transition: background-color .2s, color .2s;
}
.chip[aria-pressed="true"] { background: var(--ink); color: #fff; }
.chip--dark { border-color: rgba(255, 255, 255, .6); color: #fff; }
.chip--dark[aria-pressed="true"] { background: #fff; color: var(--ink); border-color: #fff; }
.linkbtn { border: 0; background: none; padding: 8px 0; font-size: 13px; font-weight: 600; color: var(--ink-2); text-decoration: underline; text-underline-offset: 3px; }

/* ------------------------------------------------------------------ sticky bar */
.bar {
  position: fixed; inset: 0 0 auto; z-index: 50;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
  transform: translateY(-101%);
  transition: transform .35s var(--ease);
}
.bar.is-on { transform: none; }
.bar__inner {
  max-width: 1180px; margin: 0 auto; height: 52px; padding: 0 var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.bar__brand { font-family: var(--display); font-weight: 750; letter-spacing: -0.035em; font-size: 24px; color: var(--ink); text-decoration: none; line-height: 1; }
.bar__brand:hover { color: var(--red); }
.bar__nav { display: none; gap: 22px; }
.bar__nav a { font-size: 13px; font-weight: 600; color: var(--ink-2); text-decoration: none; padding: 6px 0; border-bottom: 2px solid transparent; }
.bar__nav a:hover, .bar__nav a.is-current { color: var(--red); border-bottom-color: var(--red); }
.bar__meta { font-size: 11px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase; color: var(--muted); }
.bar__progress { height: 3px; background: transparent; }
.bar__progress span { display: block; height: 100%; width: 100%; background: var(--red); transform-origin: 0 50%; transform: scaleX(0); }

/* ------------------------------------------------------------------ heartbeat */
@keyframes lubdub {
  0% { transform: scale(1); }
  8% { transform: scale(1.012); }
  14% { transform: scale(1.0); }
  22% { transform: scale(1.045); }
  34% { transform: scale(.995); }
  48%, 100% { transform: scale(1); }
}
.beat { animation: lubdub var(--beat) infinite; transform-origin: 50% 58%; will-change: transform; }

/* ------------------------------------------------------------------ cover */
.cover {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: 100vh; min-height: 100svh;
  color: #fff;
  background:
    radial-gradient(120% 70% at 70% 38%, #B3261E 0%, rgba(179, 38, 30, 0) 60%),
    radial-gradient(90% 60% at 10% 100%, #5C0F0C 0%, rgba(92, 15, 12, 0) 70%),
    #8E1B16;
}
.cover a { color: #fff; }
.cover__cells { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; opacity: .9; pointer-events: none; }
.cover__grid {
  max-width: 1180px; margin: 0 auto;
  padding: calc(22px + env(safe-area-inset-top)) var(--gutter) 26px;
  display: grid; gap: 18px;
  grid-template-areas: "top" "mast" "heart" "ecg" "story" "teasers" "foot";
}
.cover__top { grid-area: top; display: flex; justify-content: space-between; font-size: 11px; font-weight: 600; letter-spacing: 1.4px; text-transform: uppercase; }
.cover__mast { grid-area: mast; border-bottom: 1px solid rgba(255, 255, 255, .45); padding-bottom: 12px; }
.cover__title { font-size: clamp(84px, 27vw, 176px); font-weight: 800; line-height: .86; letter-spacing: -0.05em; }
.cover__tag { font-family: var(--display); font-weight: 500; font-size: 17px; letter-spacing: -0.005em; margin-top: 6px; }
.cover__heart { grid-area: heart; position: relative; justify-self: center; width: min(74vw, 400px); margin: -6px 0 -10px; }
.cover__img { position: relative; width: 100%; filter: drop-shadow(0 30px 40px rgba(40, 0, 0, .45)) drop-shadow(0 6px 12px rgba(40, 0, 0, .35)); }
.cover__glow {
  position: absolute; inset: 12% 0 6%; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(255, 170, 150, .55), rgba(255, 120, 100, .12) 60%, transparent 75%);
  filter: blur(10px);
  animation: glow var(--beat) infinite;
}
@keyframes glow { 0%, 100% { opacity: .55; transform: scale(.98); } 22% { opacity: 1; transform: scale(1.04); } }
.cover__ecg { grid-area: ecg; position: relative; }
.cover__ecg svg { width: 100%; height: 72px; overflow: visible; }
.ecg__base { stroke: rgba(255, 255, 255, .22); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; vector-effect: non-scaling-stroke; }
.ecg__trace {
  stroke: #fff; stroke-width: 3; stroke-linejoin: round; stroke-linecap: round; vector-effect: non-scaling-stroke;
  filter: drop-shadow(0 0 6px rgba(255, 220, 210, .9));
}
.ecg__bpm { position: absolute; right: 0; top: -2px; font-size: 11px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase; opacity: .85; }
.ecg__bpm b { font-family: var(--display); font-weight: 700; font-size: 22px; letter-spacing: 0; margin-right: 4px; }
.cover__story { grid-area: story; display: grid; gap: 10px; }
.cover__headline { font-size: clamp(40px, 11.5vw, 64px); font-weight: 750; line-height: 1; letter-spacing: -0.04em; }
.cover__dek { font-family: var(--serif); font-size: 18px; line-height: 1.45; max-width: 34ch; }
.cover__teasers { grid-area: teasers; list-style: none; margin: 0; padding: 0; }
.cover__teasers li { border-top: 1px solid rgba(255, 255, 255, .45); }
.cover__teasers li:last-child { border-bottom: 1px solid rgba(255, 255, 255, .45); }
.cover__teasers a {
  display: flex; gap: 10px; align-items: baseline; padding: 12px 0; min-height: 44px;
  font-family: var(--serif); font-size: 17px; text-decoration: none;
  transition: padding-left .25s var(--ease);
}
.cover__teasers a:hover { padding-left: 6px; color: #fff; }
.cover__teasers span { flex: none; min-width: 104px; font-family: var(--sans); font-size: 11px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase; }
.cover__foot { grid-area: foot; display: flex; justify-content: space-between; align-items: center; margin-top: 6px; }
.badge { background: #fff; color: var(--red-deep); font-size: 11px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase; padding: 8px 12px; border-radius: 2px; }
.cover__cta { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; font-size: 16px; font-weight: 600; text-decoration: none; }
.cover__cta span { display: inline-block; transition: transform .25s var(--ease); }
.cover__cta:hover span { transform: translateX(4px); }

/* ------------------------------------------------------------------ article */
.article { padding: 56px 0 24px; display: grid; gap: 28px; }
.article--cont { padding-top: 48px; }
.col { width: 100%; max-width: 720px; margin: 0 auto; padding: 0 var(--gutter); }
.article__head { display: grid; gap: 12px; }
.article__title { font-size: clamp(40px, 10vw, 76px); font-weight: 750; line-height: 1; letter-spacing: -0.04em; }
.article__dek { font-family: var(--display); font-weight: 500; font-size: clamp(19px, 2.4vw, 23px); line-height: 1.4; letter-spacing: -0.01em; color: var(--ink-2); }
.byline { font-size: 12px; color: var(--muted); }
.prose p { font-family: var(--serif); font-size: 18px; line-height: 1.66; }
.dropcap::first-letter {
  float: left; font-family: var(--display); font-weight: 750; font-size: 74px; line-height: .82;
  padding: 6px 10px 0 0; color: var(--red);
}

.fig figcaption { font-family: var(--serif); font-size: 15px; line-height: 1.5; color: var(--ink-2); margin-top: 10px; }
.fig figcaption .credit { margin-left: 4px; }
.fig--wide { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 var(--gutter); }
.fig--full { width: 100%; }

.hero-photo__frame { position: relative; overflow: hidden; height: clamp(280px, 62vw, 680px); background: #2a1c12; }
.hero-photo__frame img { width: 100%; height: 100%; object-fit: cover; object-position: 30% 55%; transform: scale(1.06); transition: transform 1.6s var(--ease); }
.hero-photo.is-in .hero-photo__frame img { transform: scale(1); }
.hero-photo__frame::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0, 0, 0, 0) 55%, rgba(10, 4, 2, .55)); pointer-events: none; }
.hero-photo__time {
  position: absolute; left: var(--gutter); bottom: 14px; z-index: 1;
  font-family: var(--display); font-weight: 750; letter-spacing: -0.04em; font-size: clamp(56px, 15vw, 150px); line-height: 1; color: #fff;
  text-shadow: 0 6px 30px rgba(0, 0, 0, .35);
}

/* pulse box */
.pulse-box {
  display: grid; gap: 14px;
  padding-top: 18px; padding-bottom: 18px;
  border-top: 3px solid var(--red); background: var(--rose);
  max-width: 680px;
}
.pulse-box h3 { font-size: 22px; line-height: 1.15; margin: 4px 0 4px; }
.pulse-box p { font-size: 14px; color: var(--ink-2); }
.pulse-box__ctrl { display: grid; grid-template-columns: 1fr 1fr; border: 1.5px solid var(--ink); background: #fff; }
.seg { min-height: 46px; border: 0; background: #fff; font-size: 14px; font-weight: 600; padding: 6px 10px; transition: background-color .2s, color .2s; }
.seg[aria-pressed="true"] { background: var(--ink); color: #fff; }
.pulse-box__meter { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.pulse-box__meter b { font-family: var(--display); font-weight: 700; font-size: 34px; color: var(--red); margin-right: 4px; vertical-align: -3px; }
.pulse-box__meter small { color: var(--muted); }
.pulse-box__heart { width: 34px; color: var(--red); transform-origin: 50% 55%; }

/* fist comparison */
.fist { background: var(--panel); padding-top: 18px; padding-bottom: 18px; max-width: 1060px; }
.fist__row { display: grid; grid-template-columns: 1.55fr auto 1fr; align-items: center; gap: 8px; }
.fist__hand { width: 100%; filter: drop-shadow(0 18px 20px rgba(0, 0, 0, .18)); }
.fist__eq { font-family: var(--display); font-weight: 600; font-size: 48px; color: var(--muted); }
.fist__heart { width: 78%; justify-self: center; filter: drop-shadow(0 18px 20px rgba(60, 0, 0, .25)); }
.fist figcaption { padding: 0 2px; }

/* ------------------------------------------------------------------ labs */
.lab {
  width: calc(100% - 2 * var(--gutter) + 2 * var(--gutter)); max-width: 1100px; margin: 8px auto;
  background: var(--panel); border-top: 3px solid var(--ink);
  padding: 20px var(--gutter) 24px;
  display: grid; gap: 16px;
}
.lab__head { display: grid; gap: 4px; }
.lab__head h2 { font-size: clamp(28px, 6vw, 40px); line-height: 1.1; }

.lab1 { display: grid; gap: 18px; }
.lab1__stage { display: grid; gap: 10px; justify-items: center; }
.section-fig { position: relative; width: min(100%, 470px); }
.section-fig img { width: 100%; filter: drop-shadow(0 22px 26px rgba(60, 10, 0, .22)); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }

.hot {
  position: absolute; left: var(--x); top: var(--y); z-index: 2;
  width: 40px; height: 40px; margin: -20px 0 0 -20px; padding: 0;
  border-radius: 50%; border: 2.5px solid #fff;
  background: rgba(255, 255, 255, .28);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .35);
  transition: transform .25s var(--ease), background-color .25s;
}
.hot i { position: absolute; inset: 7px; border-radius: 50%; background: var(--c); }
.hot::after {
  content: ""; position: absolute; inset: -3px; border-radius: 50%; border: 2px solid var(--c);
  animation: ping 1.8s var(--ease) infinite; opacity: 0;
}
.hot--blue { --c: var(--blue); }
.hot--red { --c: var(--red); }
.hot:hover { transform: scale(1.1); }
.hot[aria-pressed="true"] { transform: scale(1.2); background: #fff; }
.hot[aria-pressed="true"]::after { animation-duration: 1.1s; }
@keyframes ping { 0% { transform: scale(.9); opacity: .9; } 100% { transform: scale(2.1); opacity: 0; } }

.tag {
  position: absolute; left: var(--x); top: var(--y); z-index: 1;
  transform: translate(10px, -50%);
  font-size: 11px; font-weight: 600; line-height: 1.2; white-space: nowrap;
  padding: 4px 7px; border-radius: 3px; color: #fff; background: var(--c);
  box-shadow: 0 2px 8px rgba(0, 0, 0, .2);
  pointer-events: none;
  animation: tagin .35s var(--ease) both;
}
.tag::before { content: ""; position: absolute; left: -10px; top: 50%; width: 10px; height: 1.5px; background: var(--c); }
.tag::after { content: ""; position: absolute; left: -13px; top: 50%; width: 6px; height: 6px; margin-top: -2.25px; border-radius: 50%; background: var(--c); border: 1.5px solid #fff; }
.tag--left { transform: translate(calc(-100% - 10px), -50%); }
.tag--left::before { left: auto; right: -10px; }
.tag--left::after { left: auto; right: -13px; }
.tag--red { --c: var(--red); }
.tag--blue { --c: var(--blue); }
.tag--ink { --c: var(--ink); }
.tag[hidden] { display: none; }
/* hangs below its point, so it never runs into the pulmonary-artery tag at the same height */
.tag--under { transform: translate(-88%, 20px); }
.tag--under::before { left: 88%; right: auto; top: -18px; width: 1.5px; height: 18px; }
.tag--under::after { left: calc(88% - 3.75px); right: auto; top: -22px; margin-top: 0; }
@keyframes tagin { from { opacity: 0; } to { opacity: 1; } }

.lab1__panel { display: grid; gap: 10px; align-content: start; }
.flowhint { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: 11px; font-weight: 600; line-height: 1.35; }
.blue { color: var(--blue); }
.red { color: var(--red); }
.gold { color: var(--gold); }
.chambers { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.chamber {
  display: flex; flex-direction: column; justify-content: flex-end; align-items: flex-start; gap: 2px;
  height: 92px; padding: 12px; border-radius: 6px; text-align: left;
  border: 2px solid var(--c); background: #fff; color: var(--c);
  transition: background-color .25s, color .25s, transform .2s var(--ease);
}
.chamber--tall { height: 116px; }
.chamber small { font-size: 11px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; opacity: .85; }
.chamber b { font-family: var(--display); font-weight: 700; font-size: 24px; line-height: 1.05; }
.chamber--blue { --c: var(--blue); }
.chamber--red { --c: var(--red); }
.chamber:hover { transform: translateY(-2px); }
.chamber[aria-pressed="true"] { background: var(--c); color: #fff; }
.info { background: #fff; padding: 16px; display: grid; gap: 8px; border-left: 4px solid var(--c, var(--red)); }
.info h3 { font-size: 24px; color: var(--c, var(--red)); }
.info p { font-family: var(--serif); font-size: 17px; line-height: 1.5; }
.info dl { margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; border-top: 1px solid var(--line); padding-top: 10px; font-size: 13px; line-height: 1.4; }
.info dt { color: var(--muted); }
.info dd { margin: 2px 0 0; font-weight: 600; }
.info.is-swap { animation: swap .4s var(--ease); }
@keyframes swap { from { opacity: .2; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* lab 2 */
.segbar { display: grid; grid-template-columns: 1fr 1fr; border: 1.5px solid var(--ink); max-width: 520px; }
.segbar button { min-height: 46px; border: 0; background: #fff; font-size: 14px; font-weight: 600; transition: background-color .2s, color .2s; }
.segbar button[aria-pressed="true"] { background: var(--ink); color: #fff; }
.lab2 { display: grid; gap: 18px; }
.routemap { background: #fff; border-radius: 4px; padding: 8px; }
.routemap svg { width: 100%; max-width: 480px; margin: 0 auto; overflow: visible; }
.rm-airway { fill: none; stroke: #D98C84; stroke-width: 8; stroke-linecap: round; }
.rm-capnet { fill: none; stroke: rgba(150, 40, 40, .35); stroke-width: 1.5; }
.rm-capnet--body { stroke: rgba(150, 90, 60, .35); }
.rm-label { font-family: var(--sans); font-size: 12px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; fill: var(--muted); text-anchor: middle; }
.rm-label--start { text-anchor: start; }
.rm-ch { stroke-width: 2; transition: fill .3s; }
.rm-ch--blue { fill: #E3EBF6; stroke: var(--blue); }
.rm-ch--red { fill: #FBE4E1; stroke: var(--red); }
.rm-ch.is-hot.rm-ch--blue { fill: var(--blue); }
.rm-ch.is-hot.rm-ch--red { fill: var(--red); }
.rm-chl { font-family: var(--sans); font-size: 11px; font-weight: 600; text-anchor: middle; fill: var(--ink-2); pointer-events: none; transition: fill .3s; }
.rm-chl.is-hot { fill: #fff; }
.rm-route { fill: none; stroke: #DCD6CE; stroke-width: 5; stroke-linejoin: round; stroke-linecap: round; }
.rm-route-col { fill: none; stroke-width: 6; stroke-linejoin: round; stroke-linecap: round; }
.rm-arrow { fill: currentColor; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.steps li {
  display: flex; gap: 12px; align-items: flex-start; padding: 10px 12px; border-radius: 4px;
  background: transparent; cursor: pointer;
  transition: background-color .3s, box-shadow .3s;
}
.steps li:hover { background: rgba(255, 255, 255, .6); }
.steps li.is-active { background: #fff; box-shadow: 0 6px 18px rgba(22, 19, 15, .08); }
.steps .num {
  flex: none; width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 600; color: #fff; background: var(--c);
  transition: transform .3s var(--ease);
}
.steps li.is-active .num { transform: scale(1.12); box-shadow: 0 0 0 4px color-mix(in srgb, var(--c) 22%, transparent); }
.steps .t { font-family: var(--serif); font-size: 17px; line-height: 1.45; padding-top: 2px; }
.legend { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; font-size: 13px; color: var(--ink-2); margin-top: 6px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.dot { display: inline-block; width: 11px; height: 11px; border-radius: 50%; }
.dot--red { background: var(--red); }
.dot--blue { background: var(--blue); }
.legend .linkbtn { margin-left: auto; }

/* ------------------------------------------------------------------ flow band */
.flowband {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: 72vh; min-height: 72svh; margin: 44px 0 0;
  display: grid; align-content: center;
  background: #2b0507 url("../assets/video/flow-poster.webp") center / cover no-repeat;
  color: #fff;
}
.flowband__video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.flowband__shade { position: absolute; inset: 0; z-index: -1; background: radial-gradient(80% 70% at 50% 50%, rgba(30, 2, 4, .25), rgba(20, 0, 2, .72)); }
.flowband__quote {
  margin: 0 auto; max-width: 900px; padding: 40px var(--gutter);
  border-top: 1px solid rgba(255, 255, 255, .7); border-bottom: 1px solid rgba(255, 255, 255, .7);
  width: calc(100% - 2 * var(--gutter));
}
.flowband__quote p { font-family: var(--display); font-weight: 600; font-size: clamp(30px, 6.4vw, 60px); line-height: 1.1; letter-spacing: -0.03em; text-shadow: 0 4px 30px rgba(0, 0, 0, .5); }
.flowband__credit { position: absolute; right: var(--gutter); bottom: 12px; font-size: 11px; opacity: .7; }

/* ------------------------------------------------------------------ 3D model */
.model { background: #16130F; color: #fff; padding: 48px 0 56px; }
.model__inner { max-width: 1180px; margin: 0 auto; padding: 0 var(--gutter); display: grid; gap: 22px; }
.model__text { display: grid; gap: 10px; align-content: center; }
.model__text h2 { font-size: clamp(30px, 6.5vw, 48px); line-height: 1.08; }
.model__text p { font-family: var(--serif); font-size: 18px; line-height: 1.55; color: rgba(255, 255, 255, .88); }
.model__how { list-style: none; margin: 4px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13px; color: rgba(255, 255, 255, .7); }
.model__how b { color: #fff; }
.viewer {
  position: relative; display: grid; gap: 12px;
}
.viewer__poster, .viewer__stage {
  position: relative; aspect-ratio: 4 / 5; border-radius: 6px; overflow: hidden;
  background: radial-gradient(70% 60% at 50% 45%, #3a1512 0%, #1e0d0b 55%, #110c0a 100%);
  border: 1px solid rgba(255, 255, 255, .12);
}
.viewer__poster { display: grid; place-items: center; }
.viewer__poster img { position: absolute; height: 82%; width: auto; left: 50%; top: 50%; transform: translate(-50%, -50%); opacity: .55; filter: saturate(.8) blur(1px); }
.viewer__poster .btn { position: relative; z-index: 1; box-shadow: 0 10px 30px rgba(0, 0, 0, .45); }
.viewer__size { position: absolute; bottom: 12px; right: 14px; font-size: 11px; color: rgba(255, 255, 255, .55); }
.viewer__stage canvas { width: 100%; height: 100%; touch-action: none; cursor: grab; }
.viewer__stage canvas:active { cursor: grabbing; }
.viewer__labels { position: absolute; inset: 0; pointer-events: none; }
.vlabel {
  position: absolute; left: 0; top: 0; transform: translate(-50%, -50%);
  font-size: 11px; font-weight: 600; white-space: nowrap; padding: 3px 7px; border-radius: 3px;
  color: #fff; background: var(--c); box-shadow: 0 2px 10px rgba(0, 0, 0, .35);
  transition: opacity .3s;
}
.vlabel--red { --c: var(--red); }
.vlabel--blue { --c: var(--blue); }
.viewer__status { position: absolute; inset: auto 0 14px; text-align: center; font-size: 13px; color: rgba(255, 255, 255, .8); }
.viewer__status:empty { display: none; }
.viewer__ctrl { display: flex; flex-wrap: wrap; gap: 8px; }
.viewer__ctrl[hidden], .viewer__stage[hidden] { display: none; }

/* ------------------------------------------------------------------ vessels */
.vessels__stage { position: relative; }
.vessels__stage img { width: 100%; }
.vtag {
  position: absolute; left: var(--x); top: var(--y);
  transform: translate(-50%, calc(-100% - 14px));
  display: grid; gap: 1px; padding: 6px 10px; border-radius: 4px;
  background: var(--ink); color: #fff; font-size: 11px; line-height: 1.25; white-space: nowrap;
  box-shadow: 0 6px 16px rgba(0, 0, 0, .18);
}
.vtag b { font-family: var(--display); font-weight: 700; font-size: 17px; }
.vtag::after { content: ""; position: absolute; left: 50%; bottom: -6px; margin-left: -6px; border: 6px solid transparent; border-bottom: 0; border-top-color: var(--ink); }
.vtag--left { transform: translate(-70%, calc(-100% - 14px)); }
.vtag--left::after { left: 70%; }
@media (max-width: 599px) {
  /* phones: narrower, wrapping callouts so the three never collide */
  .vessels { margin-top: 44px; }
  .vtag { white-space: normal; width: max-content; max-width: 31%; font-size: 10px; padding: 4px 7px; line-height: 1.2; }
  .vtag b { font-size: 15px; }
  .vtag--left { transform: translate(-55%, calc(-100% - 14px)); }
  .vtag--left::after { left: 55%; }
}

/* ------------------------------------------------------------------ blood infographic */
.blood { width: 100%; max-width: 1100px; margin: 0 auto; padding: 18px var(--gutter) 0; border-top: 3px solid var(--ink); display: grid; gap: 18px; }
.blood__head { display: grid; gap: 4px; }
.blood__head h2 { font-size: clamp(28px, 6vw, 40px); line-height: 1.1; }
.blood__grid { display: grid; grid-template-columns: 112px 1fr; gap: 16px 20px; align-items: start; }
.tube { position: relative; width: 112px; }
.tube img { width: 100%; filter: drop-shadow(0 16px 20px rgba(0, 0, 0, .16)); }
.tube__lbl {
  position: absolute; left: 86%; top: var(--y); transform: translateY(-50%);
  display: grid; padding-left: 26px; width: max-content; max-width: 46vw;
  font-size: 12px; line-height: 1.3; color: var(--ink-2);
}
.tube__lbl::before { content: ""; position: absolute; left: 0; top: 50%; width: 22px; border-top: 1.5px solid var(--ink); }
.tube__lbl b { font-family: var(--display); font-weight: 700; font-size: 24px; line-height: 1.05; color: var(--ink); }
.tube__lbl b.gold { color: var(--gold); }
.tube__lbl b.red { color: var(--red); }
.tube__lbl--thin b { font-size: 16px; }
.blood__data { grid-column: 1 / -1; display: grid; gap: 16px; }
.stack { display: flex; height: 44px; background: var(--panel); overflow: hidden; }
.stack span { display: block; height: 100%; width: 0; transition: width 1.4s var(--ease); }
.stack__p { background: linear-gradient(180deg, #EAC570, var(--plasma)); }
.stack__r { background: linear-gradient(180deg, #C2342B, var(--red)); transition-delay: .25s !important; }
.stack__w { background: var(--ink); transition-delay: .5s !important; min-width: 0; }
.blood.is-in .stack span { width: var(--w); }
.blood.is-in .stack__w { min-width: 4px; }
.stats3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; font-size: 12px; line-height: 1.4; }
.stats3 div { display: grid; gap: 2px; align-content: start; }
.stats3 b { font-family: var(--display); font-weight: 700; font-size: 28px; line-height: 1.05; }
.cells { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.cells li { display: grid; gap: 2px; align-content: start; background: var(--panel); padding: 12px 10px; border-radius: 4px; font-size: 12px; line-height: 1.35; }
.cells img { width: 100%; aspect-ratio: 1; object-fit: contain; margin-bottom: 6px; transition: transform .5s var(--ease); }
.cells li:hover img { transform: scale(1.06) rotate(-3deg); }
.cells b { font-family: var(--display); font-weight: 700; font-size: 17px; line-height: 1.15; }
.cells span { color: var(--ink-2); }
.next-link { display: grid; gap: 8px; }

/* ------------------------------------------------------------------ rubrik */
.rubrik { background: var(--panel); padding: 48px 0; margin-top: 32px; }
.rubrik__grid { max-width: 1180px; margin: 0 auto; padding: 0 var(--gutter); display: grid; gap: 28px; }
.rcard { background: #fff; display: grid; align-content: start; }
.rcard--myth { border: 1.5px solid var(--ink); }
.rcard--donor { border-top: 3px solid var(--ink); }
.rcard__photo { position: relative; aspect-ratio: 3 / 2; overflow: hidden; background: #ddd; }
.rcard__photo > img:first-child { width: 100%; height: 100%; object-fit: cover; }
.rcard__photo .credit { position: absolute; left: 10px; bottom: 8px; color: #fff; opacity: .9; text-shadow: 0 1px 4px rgba(0, 0, 0, .6); }
.rcard__photo--donor { overflow: visible; }
.rcard__photo--donor > img:first-child { position: absolute; inset: 0; }
.bag {
  position: absolute; right: 4%; bottom: -18%; width: 30%; z-index: 2;
  filter: drop-shadow(0 18px 22px rgba(60, 0, 0, .35));
  animation: bob 5s ease-in-out infinite;
}
@keyframes bob { 0%, 100% { transform: translateY(0) rotate(-4deg); } 50% { transform: translateY(-8px) rotate(-1deg); } }
.rcard__body { padding: 18px 16px 22px; display: grid; gap: 12px; }
.rcard__body h2 { font-size: clamp(26px, 5.5vw, 34px); line-height: 1.12; }
.rcard__body p { font-family: var(--serif); font-size: 17px; line-height: 1.55; }
.rcard__body p.small { font-family: var(--sans); font-size: 13px; color: var(--ink-2); }
.rcard--donor .rcard__body { padding-top: 26px; }
.mf { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.mf__card { position: relative; padding: 12px; display: grid; gap: 4px; align-content: start; overflow: hidden; }
.mf__card--myth { background: var(--panel); }
.mf__card--fact { background: var(--rose); }
.mf__lbl { font-size: 11px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; color: var(--muted); }
.mf__card--fact .mf__lbl { color: var(--red-deep); }
.mf__txt { font-family: var(--serif); font-size: 16px; line-height: 1.4; }
.mf__stamp {
  position: absolute; right: 8px; bottom: 10px;
  font-size: 12px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase;
  color: var(--red); border: 2px solid var(--red); padding: 2px 8px; border-radius: 3px;
  transform: rotate(-12deg) scale(1.6); opacity: 0;
  transition: transform .45s cubic-bezier(.3, 1.6, .5, 1) .5s, opacity .2s .5s;
}
.mf__card--myth .mf__txt { transition: color .4s .4s; }
.is-in .mf__stamp { opacity: 1; transform: rotate(-12deg) scale(1); }
.is-in .mf__card--myth .mf__txt { color: var(--muted); text-decoration: line-through; text-decoration-color: rgba(179, 38, 30, .6); }
.mf__card--fact { transform: translateY(8px); opacity: .4; transition: transform .5s var(--ease) .8s, opacity .5s .8s; }
.is-in .mf__card--fact { transform: none; opacity: 1; }
.drops { display: flex; gap: 22px; }
.drops figure { display: flex; align-items: center; gap: 10px; font-size: 12px; line-height: 1.35; color: var(--ink-2); }
.drops svg { width: 30px; flex: none; }
.drops b { color: var(--ink); }
.stats2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stats2 div { background: var(--panel); padding: 12px; display: grid; gap: 2px; }
.stats2 b { font-family: var(--display); font-weight: 700; font-size: 32px; line-height: 1.05; color: var(--red); }
.stats2 span { font-size: 12px; line-height: 1.4; }

/* ------------------------------------------------------------------ quiz */
.quiz { padding: 52px 0 40px; }
.quiz__inner { max-width: 720px; margin: 0 auto; padding: 0 var(--gutter); display: grid; gap: 26px; }
.quiz__head { display: grid; gap: 8px; border-top: 3px solid var(--ink); padding-top: 14px; }
.quiz__head h2 { font-size: clamp(32px, 7vw, 46px); line-height: 1.08; }
.quiz__list { display: grid; gap: 28px; }
.q { margin: 0; padding: 0; border: 0; display: grid; gap: 10px; }
.q legend { padding: 0 0 10px; font-family: var(--serif); font-weight: 600; font-size: 19px; line-height: 1.4; }
.q legend span { color: var(--red); }
.opt {
  position: relative; display: flex; align-items: center; gap: 10px;
  min-height: 52px; padding: 10px 14px; text-align: left; font-size: 15px; line-height: 1.35;
  border-radius: 4px; border: 1.5px solid #CFCAC3; background: #fff; color: var(--ink);
  transition: border-color .2s, background-color .25s, color .25s, transform .2s var(--ease), opacity .25s;
}
.opt:hover:not([disabled]) { border-color: var(--ink); transform: translateX(3px); }
.opt .key { flex: none; width: 26px; height: 26px; border-radius: 50%; border: 1.5px solid currentColor; display: grid; place-items: center; font-size: 12px; font-weight: 600; opacity: .7; }
.opt[disabled] { cursor: default; }
.opt.is-correct { background: var(--blue); border-color: var(--blue); color: #fff; font-weight: 600; animation: pop .45s var(--ease); }
.opt.is-wrong { background: var(--rose); border-color: var(--red); color: var(--red-deep); animation: shake .45s; }
.opt.is-dim { color: #8B857E; border-color: var(--line); }
@keyframes pop { 0% { transform: scale(.98); } 50% { transform: scale(1.025); } 100% { transform: scale(1); } }
@keyframes shake { 0%, 100% { transform: translateX(0); } 20% { transform: translateX(-6px); } 40% { transform: translateX(6px); } 60% { transform: translateX(-4px); } 80% { transform: translateX(3px); } }
.explain { background: var(--panel); padding: 12px 14px; display: grid; gap: 4px; animation: swap .4s var(--ease); }
.explain b { font-size: 13px; }
.explain b.ok { color: var(--blue); }
.explain b.no { color: var(--red-deep); }
.explain span { font-family: var(--serif); font-size: 16px; line-height: 1.5; }
.score { background: var(--ink); color: #fff; padding: 16px; display: flex; align-items: center; gap: 14px; }
.score__ring { width: 52px; height: 52px; flex: none; transform: rotate(-90deg); }
.score__track { fill: none; stroke: rgba(255, 255, 255, .15); stroke-width: 4; }
.score__fill { fill: none; stroke: var(--pink); stroke-width: 4; stroke-linecap: round; stroke-dasharray: 119.4; stroke-dashoffset: 119.4; transition: stroke-dashoffset .6s var(--ease), stroke .3s; }
.score__text { display: grid; gap: 2px; flex: 1; }
.score__lbl { font-size: 11px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase; color: var(--pink); }
.score__val { font-family: var(--display); font-weight: 700; font-size: 28px; line-height: 1.05; }
.score.is-done .score__val { animation: pop .5s var(--ease); }

/* ------------------------------------------------------------------ next issue */
.nextissue { position: relative; background: #08131F; color: #fff; display: grid; overflow: hidden; }
.nextissue__img { width: 100%; max-height: 520px; object-fit: cover; object-position: 50% 30%; }
.nextissue__text { padding: 26px var(--gutter) 40px; display: grid; gap: 8px; max-width: 640px; }
.nextissue__text h2 { font-size: clamp(28px, 6vw, 44px); line-height: 1.1; }

/* ------------------------------------------------------------------ footer */
.foot { border-top: 1px solid var(--line); padding: 28px 0 calc(28px + env(safe-area-inset-bottom)); }
.foot__inner { max-width: 1180px; margin: 0 auto; padding: 0 var(--gutter); display: grid; gap: 6px; font-size: 13px; color: var(--ink-2); }
.foot__brand { font-family: var(--display); font-weight: 750; letter-spacing: -0.035em; font-size: 30px; color: var(--ink); }
.foot a { font-weight: 600; margin-top: 6px; }

/* ------------------------------------------------------------------ reveal */
.js [data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.js [data-reveal].is-in { opacity: 1; transform: none; }

/* ================================================================== ≥ 600px */
@media (min-width: 600px) {
  :root { --gutter: 28px; }
  .cover__heart { width: min(58vw, 420px); }
  .pulse-box { grid-template-columns: 1fr auto; align-items: center; padding: 20px 22px; }
  .pulse-box__text { grid-column: 1 / -1; }
  .lab { width: calc(100% - 2 * var(--gutter)); padding: 24px 24px 28px; }
  .blood__grid { grid-template-columns: 150px 1fr; }
  .tube { width: 150px; }
  .tube__lbl { max-width: 30vw; }
  .stats3 { font-size: 13px; }
  .cells li { padding: 14px; font-size: 13px; }
  .viewer__poster, .viewer__stage { aspect-ratio: 4 / 3; }
  .nextissue { grid-template-columns: 1fr 1fr; align-items: center; }
  .nextissue__img { max-height: none; height: 100%; }
  .nextissue__text { padding: 40px var(--gutter); }
}

/* ================================================================== ≥ 900px */
@media (min-width: 900px) {
  .bar__nav { display: flex; }
  .prose p { font-size: 19px; }
  .lab1 { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); align-items: start; gap: 28px; }
  .lab1__panel { position: sticky; top: 72px; }
  .lab2 { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; gap: 28px; }
  .blood__grid { grid-template-columns: 300px 1fr; gap: 28px 36px; }
  .tube { width: 150px; margin-left: 10px; }
  .blood__data { grid-column: auto; }
  .tube__lbl { max-width: 160px; }
  .rubrik__grid { grid-template-columns: 1fr 1fr; align-items: start; }
  .model__inner { grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 40px; }
  .vtag b { font-size: 20px; }
  .vtag { font-size: 12px; }
}

/* ================================================================== ≥ 1100px: cover becomes a spread */
@media (min-width: 1100px) {
  :root { --gutter: 40px; }
  .cover__grid {
    min-height: 100vh; min-height: 100svh;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    grid-template-rows: auto auto auto 1fr auto auto;
    grid-template-areas:
      "top top"
      "mast heart"
      "ecg heart"
      "story heart"
      "teasers heart"
      "foot heart";
    column-gap: 48px; row-gap: 22px;
    padding-top: 30px; padding-bottom: 34px;
  }
  .cover__heart { width: 100%; max-width: 470px; align-self: center; margin: 0; }
  .cover__title { font-size: 168px; }
  .cover__story { align-self: end; }
  .article__head { padding-top: 12px; }
}

@media (min-width: 1400px) {
  .cover__heart { max-width: 520px; }
}

/* ------------------------------------------------------------------ reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}