/* ============================================================
   OXYCELL SCIENCE — the dive. Scroll-driven pressurization,
   O₂ particle canvases, research library. Brand tokens only.
   ============================================================ */

.sci-wrap { max-width: 1320px; margin: 0 auto; padding: 0 var(--ox-pad-x); }
.sci-h2 { font-family: var(--ox-serif); font-weight: 400; font-size: clamp(38px, 5vw, 72px); line-height: 1.0; letter-spacing: .015em; color: var(--ox-ink); margin: 14px 0 0; }
.sci-body { margin: 22px 0 0; max-width: 640px; font-family: var(--ox-sans); font-weight: 300; font-size: clamp(16px, 1.4vw, 19px); line-height: 1.6; color: var(--ox-ink-muted); }
.sci-body em { font-style: italic; }
.sci-accent { color: rgb(38,93,136); }
.sci-on-deep { color: #fff; }
.sci-on-deep-muted { color: rgba(209,230,255,0.66); }
.sci-foot { margin-top: 40px; font-family: var(--ox-sans); font-size: 12px; line-height: 1.7; color: var(--ox-ink-muted); max-width: 760px; }
.sci-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

/* reveals */
.sci-reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s cubic-bezier(.22,.61,.36,1), transform .8s cubic-bezier(.22,.61,.36,1); }
.sci-reveal[data-delay="1"] { transition-delay: .12s; }
.sci-reveal[data-delay="2"] { transition-delay: .24s; }
.sci-reveal[data-delay="3"] { transition-delay: .36s; }
.sci-reveal.is-in { opacity: 1; transform: none; }

/* ---- hero ---- */
.sci-hero { position: relative; height: 100vh; min-height: 680px; overflow: hidden;
  background: radial-gradient(120% 90% at 50% 0%, rgb(20,42,62) 0%, rgb(9,21,33) 55%, rgb(3,8,15) 100%); }
.sci-hero__scrim { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(3,8,15,0.30) 0%, rgba(3,8,15,0) 30%, rgba(3,8,15,0) 60%, rgba(3,8,15,0.55) 100%); pointer-events: none; }
.sci-hero__content { position: absolute; left: 0; right: 0; bottom: 12%; z-index: 2; max-width: 1320px; margin: 0 auto; padding: 0 var(--ox-pad-x); }
.sci-hero__title { font-family: var(--ox-serif); font-weight: 400; font-size: clamp(64px, 11vw, 180px); line-height: .92; letter-spacing: .01em; color: #fff; margin: 18px 0 0; }
.sci-hero__sub { margin: 26px 0 0; max-width: 560px; font-family: var(--ox-sans); font-weight: 300; font-size: clamp(16px, 1.5vw, 20px); line-height: 1.55; color: rgba(255,255,255,0.85); }
.sci-hero__meta { margin-top: 34px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.sci-chip { display: inline-flex; align-items: baseline; gap: 6px; padding: 10px 18px; border: 1px solid rgba(143,193,231,0.35); border-radius: 999px;
  font-family: var(--ox-sans); font-size: 13px; letter-spacing: .08em; color: rgba(209,230,255,0.85); text-transform: uppercase; }
.sci-chip em { font-style: normal; font-family: var(--ox-serif); font-size: 22px; color: #fff; letter-spacing: 0; }
.sci-chip-label { font-family: var(--ox-sans); font-size: 12.5px; letter-spacing: .04em; color: rgba(209,230,255,0.5); }
.sci-hero__cue { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 2; color: rgba(255,255,255,0.55); animation: sciBob 2.4s ease-in-out infinite; }
@keyframes sciBob { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,7px); } }

/* ---- the dive (sticky scrollytelling) ---- */
.sci-dive { position: relative; height: 260vh; background: rgb(3,8,15); }
.sci-dive__sticky { position: sticky; top: 0; height: 100vh; overflow: hidden;
  background: linear-gradient(180deg, rgb(7,18,28) 0%, rgb(3,8,15) 100%); }
.sci-holo { position: absolute; inset: 0; z-index: 2; display: flex; align-items: center; justify-content: center; pointer-events: none; }
.sci-holo__dial { position: relative; width: clamp(280px, 34vw, 460px); aspect-ratio: 1;
  transform: perspective(900px) rotateX(14deg); animation: sciHoloFloat 7s ease-in-out infinite; }
@keyframes sciHoloFloat { 0%,100% { transform: perspective(900px) rotateX(14deg) translateY(0); } 50% { transform: perspective(900px) rotateX(14deg) translateY(-10px); } }
.sci-holo__dial svg { width: 100%; height: 100%; overflow: visible;
  filter: drop-shadow(0 0 18px rgba(143,193,231,0.35)) drop-shadow(0 0 60px rgba(143,193,231,0.12)); }
.sci-holo__ghost { fill: none; stroke: rgba(143,193,231,0.22); stroke-width: 1; stroke-dasharray: 3 7;
  transform-origin: 150px 150px; animation: sciHoloSpin 26s linear infinite; }
@keyframes sciHoloSpin { to { transform: rotate(360deg); } }
.sci-holo__ticks line { stroke: rgba(209,230,255,0.45); stroke-width: 1.6; stroke-linecap: round; }
.sci-holo__track { fill: none; stroke: rgba(143,193,231,0.16); stroke-width: 5; stroke-linecap: round; }
.sci-holo__arc { fill: none; stroke: url(#sciArc); stroke-width: 5; stroke-linecap: round;
  stroke-dasharray: 100; stroke-dashoffset: 100; }
.sci-holo__needle { transform-origin: 150px 150px; transition: transform .12s linear; }
.sci-holo__needle line { stroke: #fff; stroke-width: 2.4; stroke-linecap: round; }
.sci-holo__needle circle { fill: #fff; filter: drop-shadow(0 0 8px rgba(255,255,255,0.9)); }
.sci-holo__hub { fill: rgb(9,21,33); stroke: rgba(255,255,255,0.85); stroke-width: 2; }
.sci-holo__readout { position: absolute; left: 50%; top: 58%; transform: translateX(-50%); text-align: center; }
.sci-holo__ata { display: block; font-family: var(--ox-sans); font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: rgba(143,193,231,0.9); }
.sci-holo__ata em { font-style: normal; font-family: var(--ox-serif); font-size: clamp(44px, 4.6vw, 64px); line-height: 1.05; color: #fff; display: block; font-variant-numeric: tabular-nums; }
.sci-holo__kpa { display: block; margin-top: 4px; font-family: var(--ox-sans); font-size: 13.5px; letter-spacing: .1em; color: rgba(209,230,255,0.75); font-variant-numeric: tabular-nums; }
.sci-holo__o2 { display: block; margin-top: 8px; font-family: var(--ox-sans); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: rgba(209,230,255,0.55); }
.sci-holo__o2 em { font-style: normal; color: #fff; font-size: 13px; }
.sci-dive__steps { position: absolute; inset: 0; z-index: 2; max-width: 1320px; margin: 0 auto; padding: 0 var(--ox-pad-x); }
.sci-step { position: absolute; bottom: 9%; left: var(--ox-pad-x); max-width: 520px;
  opacity: 0; transform: translateY(30px); transition: opacity .55s ease, transform .55s ease; pointer-events: none; }
.sci-step.is-active { opacity: 1; transform: none; }
.sci-step h2 { font-family: var(--ox-serif); font-weight: 400; font-size: clamp(38px, 4.6vw, 66px); line-height: 1.0; letter-spacing: .015em; color: #fff; margin: 14px 0 0; }
.sci-step p { margin: 20px 0 0; font-family: var(--ox-sans); font-weight: 300; font-size: clamp(15px, 1.3vw, 18px); line-height: 1.6; color: rgba(209,230,255,0.72); }

/* ---- 101 ---- */
.sci-101 { background: var(--ox-paper); padding: clamp(90px, 11vw, 150px) 0; }
.sci-101__grid { margin-top: 56px; display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(18px, 2vw, 32px); }
.sci-card { background: #fff; border-radius: 4px; padding: clamp(24px, 2.2vw, 36px); display: flex; flex-direction: column; gap: 12px; }
.sci-card__num { font-family: var(--ox-sans); font-size: 12px; font-weight: 600; letter-spacing: .16em; color: rgb(143,193,231); }
.sci-card h3 { font-family: var(--ox-serif); font-weight: 400; font-size: 25px; letter-spacing: .01em; color: var(--ox-ink); margin: 0; }
.sci-card p { margin: 0; font-family: var(--ox-sans); font-weight: 400; font-size: 14.5px; line-height: 1.6; color: var(--ox-ink-muted); }
.sci-figures { margin-top: clamp(48px, 6vw, 84px); display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; border-top: 1px solid rgba(19,28,40,0.12); padding-top: clamp(32px, 4vw, 52px); }
.sci-fig { display: flex; flex-direction: column; }
.sci-fig__num { font-family: var(--ox-serif); font-size: clamp(46px, 5.5vw, 80px); line-height: 1; color: var(--ox-ink); font-variant-numeric: tabular-nums; }
.sci-fig__unit { font-family: var(--ox-sans); font-weight: 300; font-size: 16px; color: rgb(38,93,136); margin-top: 4px; }
.sci-fig__label { font-family: var(--ox-sans); font-size: 13.5px; color: var(--ox-ink-muted); margin-top: 8px; }

/* ---- enhanced medicine ---- */
.sci-enhanced { position: relative; overflow: hidden; background: var(--ox-deep); padding: clamp(100px, 12vw, 170px) 0; }
.sci-enhanced .sci-wrap { position: relative; z-index: 2; }
.sci-enhanced .sci-h2 { color: #fff; }
.sci-quote { margin: clamp(40px, 5vw, 64px) 0; padding-left: clamp(20px, 2.5vw, 36px); border-left: 2px solid rgb(143,193,231); max-width: 760px; }
.sci-quote p { font-family: var(--ox-serif); font-style: italic; font-size: clamp(22px, 2.6vw, 34px); line-height: 1.25; color: #fff; margin: 0; }
.sci-quote cite { display: block; margin-top: 16px; font-family: var(--ox-sans); font-style: normal; font-size: 13px; line-height: 1.6; color: rgba(209,230,255,0.6); }
.sci-em__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(18px, 2vw, 32px); margin-bottom: clamp(36px, 4vw, 56px); }
.sci-em-card { border: 1px solid rgba(143,193,231,0.22); border-radius: 4px; padding: clamp(22px, 2.2vw, 34px); background: rgba(7,18,28,0.45); -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); }
.sci-em-card h3 { font-family: var(--ox-serif); font-weight: 400; font-size: 26px; color: #fff; margin: 0 0 12px; }
.sci-em-card p { margin: 0; font-family: var(--ox-sans); font-weight: 300; font-size: 14.5px; line-height: 1.65; color: rgba(209,230,255,0.72); }

/* ---- research library ---- */
.sci-research { background: #fff; padding: clamp(90px, 11vw, 150px) 0; }
.sci-filters { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 10px; }
.sci-filter { border: 1px solid rgba(19,28,40,0.18); background: transparent; color: var(--ox-ink-muted); cursor: pointer;
  border-radius: 999px; padding: 10px 20px; font-family: var(--ox-sans); font-size: 14px; letter-spacing: .01em; transition: all .2s ease; }
.sci-filter:hover { color: var(--ox-ink); border-color: rgba(19,28,40,0.4); }
.sci-filter.is-active { background: var(--ox-ink); border-color: var(--ox-ink); color: #fff; }
.sci-research__grid { margin-top: 44px; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(18px, 2vw, 30px); }
.sci-study { border: 1px solid rgba(19,28,40,0.1); border-radius: 4px; padding: clamp(22px, 2.2vw, 32px);
  display: flex; flex-direction: column; gap: 12px; background: var(--ox-paper); transition: transform .3s ease, box-shadow .3s ease; }
.sci-study:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(3,8,15,0.08); }
.sci-study.is-hidden { display: none; }
.sci-study__tag { font-family: var(--ox-sans); font-size: 11px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: rgb(38,93,136); }
.sci-study h3 { font-family: var(--ox-serif); font-weight: 400; font-size: 24px; line-height: 1.1; color: var(--ox-ink); margin: 0; }
.sci-study__src { font-family: var(--ox-sans); font-size: 12.5px; letter-spacing: .04em; color: var(--ox-ink-muted); }
.sci-study p { margin: 0; font-family: var(--ox-sans); font-weight: 400; font-size: 14px; line-height: 1.6; color: var(--ox-ink-muted); flex-grow: 1; }

/* ---- journal segue ---- */
.sci-journal { background: var(--ox-paper); padding: clamp(90px, 11vw, 140px) 0; }
.sci-journal__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.sci-journal__grid { margin-top: 52px; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(18px, 2vw, 32px); }
.sci-post { display: flex; flex-direction: column; gap: 14px; text-decoration: none; }
.sci-post__media { aspect-ratio: 16/10; border-radius: 4px; overflow: hidden; background: rgb(232,226,216); }
.sci-post__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.sci-post:hover .sci-post__media img { transform: scale(1.04); }
.sci-post__date { font-family: var(--ox-sans); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--ox-ink-muted); }
.sci-post h3 { font-family: var(--ox-serif); font-weight: 400; font-size: 24px; line-height: 1.15; color: var(--ox-ink); margin: 0; }

/* ---- closing ---- */
.sci-closing { position: relative; background: linear-gradient(158deg, rgb(32,46,68) 0%, rgb(13,24,36) 100%); padding: clamp(100px, 12vw, 160px) var(--ox-pad-x); text-align: center; overflow: hidden; }
.sci-closing__inner { position: relative; max-width: 760px; margin: 0 auto; }
.sci-closing h2 { font-family: var(--ox-serif); font-weight: 400; font-size: clamp(42px, 5.4vw, 78px); line-height: 1.0; letter-spacing: .015em; color: #fff; margin: 16px 0 0; }
.sci-closing p { margin: 24px auto 0; max-width: 540px; font-family: var(--ox-sans); font-weight: 300; font-size: 18px; line-height: 1.55; color: rgba(209,230,255,0.66); }
.sci-closing__cta { margin-top: 40px; display: flex; gap: 18px; justify-content: center; align-items: center; flex-wrap: wrap; }

/* ---- responsive ---- */
@media (max-width: 1080px) {
  .sci-101__grid, .sci-figures { grid-template-columns: repeat(2, 1fr); }
  .sci-em__grid, .sci-research__grid, .sci-journal__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
  .sci-dive { height: 230vh; }
  .sci-holo { align-items: flex-start; padding-top: 16vh; }
  .sci-holo__dial { width: min(64vw, 300px); }
  .sci-step h2 { font-size: clamp(30px, 8vw, 40px); }
  .sci-step { right: var(--ox-pad-x); bottom: 14%; }
  .sci-dive__hud { justify-content: flex-start; }
  .sci-gauge { text-align: left; }
  .sci-gauge__row { justify-content: flex-start; }
  .sci-gauge__bar { margin-left: 0; }
  .sci-101__grid, .sci-figures, .sci-em__grid, .sci-research__grid, .sci-journal__grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .sci-reveal { opacity: 1; transform: none; transition: none; }
  .sci-hero__cue { animation: none; }
  .sci-step { transition: none; }
}

/* ---- enhanced-medicine card media (Higgsfield scientific macros) ---- */
.sci-em-card__media { aspect-ratio: 3 / 2; border-radius: 3px; overflow: hidden; margin: -6px 0 18px; }
.sci-em-card__media img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .6s ease; }
.sci-em-card:hover .sci-em-card__media img { transform: scale(1.04); }

/* ============================================================
   V2 POLISH — ambient video, depth rail, cursor, magnets,
   letter reveal, grain, tilt. All reduced-motion safe.
   ============================================================ */

/* ambient video backgrounds */
.sci-ambient { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0;
  opacity: 0; transition: opacity 1.2s ease; pointer-events: none; }
.sci-ambient.is-on { opacity: .5; }
.sci-enhanced .sci-canvas { z-index: 1; }
.sci-enhanced .sci-wrap { z-index: 2; }
.sci-closing { isolation: isolate; }
.sci-closing .sci-ambient.is-on { opacity: .38; }
.sci-closing__inner { position: relative; z-index: 2; }
.sci-enhanced::after, .sci-closing::after { content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(180deg, rgba(3,8,15,0.55) 0%, rgba(3,8,15,0.18) 30%, rgba(3,8,15,0.18) 70%, rgba(3,8,15,0.6) 100%); }

/* film grain (very subtle, sits above everything, never blocks) */
.sci-grain { position: fixed; inset: -100px; z-index: 95; pointer-events: none; opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: sciGrain 9s steps(10) infinite; }
@keyframes sciGrain {
  0%,100% { transform: translate(0,0); } 10% { transform: translate(-3%,-2%); } 20% { transform: translate(2%,3%); }
  30% { transform: translate(-2%,1%); } 40% { transform: translate(3%,-1%); } 50% { transform: translate(-1%,2%); }
  60% { transform: translate(2%,-3%); } 70% { transform: translate(-3%,2%); } 80% { transform: translate(1%,1%); } 90% { transform: translate(-1%,-2%); } }

/* depth meter rail */
.sci-depth { position: fixed; right: clamp(14px, 1.6vw, 30px); top: 50%; transform: translateY(-50%); z-index: 80;
  display: flex; flex-direction: column; align-items: flex-end; gap: 0; pointer-events: none;
  opacity: 0; transition: opacity .5s ease; }
.sci-depth.is-on { opacity: 1; }
.sci-depth__track { position: relative; width: 2px; height: min(46vh, 420px); background: rgba(143,193,231,0.18); border-radius: 2px; }
.sci-depth__fill { position: absolute; top: 0; left: 0; width: 100%; height: 0%; background: rgb(143,193,231); border-radius: 2px; }
.sci-depth__pip { position: absolute; left: 50%; width: 10px; height: 10px; border-radius: 50%;
  background: #fff; box-shadow: 0 0 12px rgba(143,193,231,0.9); transform: translate(-50%, -50%); top: 0%; }
.sci-depth__tick { position: absolute; right: 10px; transform: translateY(-50%); white-space: nowrap;
  font-family: var(--ox-sans); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: rgba(143,193,231,0.65);
  transition: color .3s ease; }
.sci-depth__tick.is-passed { color: rgba(255,255,255,0.92); }
.sci-light .sci-depth__tick { color: rgba(19,28,40,0.45); }
.sci-light .sci-depth__tick.is-passed { color: rgba(19,28,40,0.85); }
.sci-light .sci-depth__track { background: rgba(19,28,40,0.14); }
.sci-light .sci-depth__fill { background: rgb(38,93,136); }
.sci-light .sci-depth__pip { background: rgb(19,28,40); box-shadow: 0 0 10px rgba(38,93,136,0.5); }
@media (max-width: 1100px) { .sci-depth { display: none; } }

/* cursor follower (O₂ glow) — desktop pointer only */
.sci-cursor { position: fixed; left: 0; top: 0; z-index: 99; pointer-events: none;
  width: 14px; height: 14px; border-radius: 50%; transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255,255,255,0.95) 0%, rgba(143,193,231,0.55) 45%, rgba(143,193,231,0) 75%);
  mix-blend-mode: screen; transition: width .25s ease, height .25s ease, opacity .3s ease; opacity: 0; }
.sci-cursor.is-on { opacity: 1; }
.sci-cursor.is-big { width: 52px; height: 52px; }
@media (hover: none), (pointer: coarse) { .sci-cursor { display: none; } }

/* magnetic capsules */
.sci-magnet { transition: transform .25s cubic-bezier(.22,.61,.36,1); will-change: transform; }

/* hero title letter reveal */
.sci-hero__title .sci-line { display: block; overflow: hidden; }
.sci-hero__title .sci-ch { display: inline-block; transform: translateY(112%); transition: transform .9s cubic-bezier(.22,.61,.36,1); }
.sci-hero__title.is-split.is-in .sci-ch { transform: translateY(0); }

/* card tilt */
.sci-study, .sci-em-card { transform-style: preserve-3d; will-change: transform; }

@media (prefers-reduced-motion: reduce) {
  .sci-grain { animation: none; }
  .sci-ambient { display: none; }
  .sci-cursor { display: none; }
  .sci-hero__title .sci-ch { transform: none; transition: none; }
  .sci-magnet { transition: none; }
}

/* ============================================================
   HISTORY — sticky horizontal timeline (vertical fallback <900px)
   ============================================================ */
.sci-history { position: relative; background: rgb(7,16,26); }
.sci-history__sticky { position: sticky; top: 0; height: 100vh; overflow: hidden; display: flex; flex-direction: column; justify-content: center; }
.sci-history__head { position: absolute; top: clamp(86px, 12vh, 140px); left: 50%; transform: translateX(-50%); width: 100%; max-width: 1320px; padding: 0 var(--ox-pad-x); z-index: 2; }
.sci-history__viewport { position: relative; z-index: 2; }
.sci-history__track { display: flex; align-items: stretch; gap: clamp(40px, 4vw, 72px); position: relative;
  padding: 0 var(--ox-pad-x); width: max-content; will-change: transform; }
.sci-history__line { position: absolute; left: 0; right: 0; top: 37px; height: 1px;
  background: linear-gradient(90deg, rgba(143,193,231,0) 0%, rgba(143,193,231,0.4) 4%, rgba(143,193,231,0.4) 96%, rgba(143,193,231,0) 100%); }
.sci-epoch { position: relative; flex: 0 0 clamp(300px, 26vw, 400px); padding-top: 64px; }
.sci-epoch__node { position: absolute; top: 31px; left: 0; width: 13px; height: 13px; border-radius: 50%;
  border: 2px solid rgba(143,193,231,0.7); background: rgb(7,16,26); transition: background .4s ease, box-shadow .4s ease; }
.sci-epoch.is-now .sci-epoch__node { background: #fff; border-color: #fff; box-shadow: 0 0 16px rgba(143,193,231,0.9); }
.sci-epoch__year { font-family: var(--ox-serif); font-size: clamp(40px, 3.6vw, 58px); line-height: 1; color: rgba(143,193,231,0.55); transition: color .4s ease; display: block; }
.sci-epoch.is-now .sci-epoch__year { color: #fff; }
.sci-epoch h3 { font-family: var(--ox-serif); font-weight: 400; font-size: 25px; color: #fff; margin: 14px 0 10px; letter-spacing: .01em; }
.sci-epoch p { margin: 0; font-family: var(--ox-sans); font-weight: 300; font-size: 14.5px; line-height: 1.65; color: rgba(209,230,255,0.65); }
.sci-history__pad { flex: 0 0 calc(50vw - clamp(150px, 13vw, 200px) + 40px); }

/* Today + Future epochs — permanent accents on top of the transient .is-now ignite */
.sci-epoch--today .sci-epoch__node { background: rgb(176,30,36); border-color: rgba(255,255,255,0.85); }
.sci-epoch--today .sci-epoch__year { color: rgba(255,255,255,0.92); }
.sci-epoch--today.is-now .sci-epoch__node { background: rgb(176,30,36); border-color: #fff;
  box-shadow: 0 0 18px rgba(176,30,36,0.85), 0 0 36px rgba(143,193,231,0.5); }
.sci-epoch--future .sci-epoch__node { background: transparent; border-style: dashed; border-color: rgba(143,193,231,0.85); }
.sci-epoch--future .sci-epoch__year { color: rgba(143,193,231,0.8); }
.sci-epoch--future h3 { font-style: italic; }
.sci-epoch--future.is-now .sci-epoch__node { background: rgb(7,16,26); border-color: #fff; }
.sci-history__hint { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 2;
  font-family: var(--ox-sans); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; }

@media (max-width: 900px) {
  .sci-history { height: auto !important; }
  .sci-history__sticky { position: static; height: auto; overflow: visible; padding: clamp(80px, 14vw, 120px) 0; }
  .sci-history__head { position: static; transform: none; margin: 0 auto 48px; }
  .sci-history__viewport { overflow: visible; }
  .sci-history__track { flex-direction: column; width: auto; gap: 44px; transform: none !important; padding: 0 var(--ox-pad-x); }
  .sci-history__line { left: calc(var(--ox-pad-x) + 6px); right: auto; top: 0; bottom: 0; width: 1px; height: auto;
    background: linear-gradient(180deg, rgba(143,193,231,0) 0%, rgba(143,193,231,0.4) 4%, rgba(143,193,231,0.4) 96%, rgba(143,193,231,0) 100%); }
  .sci-epoch { padding: 0 0 0 36px; flex: none; }
  .sci-epoch__node { top: 14px; left: 0; }
  .sci-history__hint, .sci-history__pad { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .sci-history__track { transition: none; }
}