/* "Inside the light": the plain-English science page. Builds on home.css tokens; scoped to .sci-* classes. */

.sci main section { position: relative; }
.sci-sec { padding: clamp(72px, 9vw, 128px) 0; }
.sci-sec + .sci-sec { border-top: 1px solid var(--line); }
.sci-h2 + .sci-lead { margin-top: 20px; }
.sci-lead { max-width: 46ch; font-size: clamp(17px, 1.5vw, 20px); line-height: 1.6; color: var(--lead); }
.sci-h2 { font-size: clamp(38px, 4.6vw, 64px); line-height: 1.04; letter-spacing: -.01em; max-width: 18ch; text-wrap: balance; }
.sci-h2 em { color: var(--gold-soft); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Generated art sits on the page colour; edges fade so no box shows. */
.sci img { display: block; max-width: 100%; height: auto; }
.art-blend { mix-blend-mode: lighten; }

/* Hero: the real beeem light and its encoded beam on the left, title on the right. Phones stack title first. */
.sci-hero { position: relative; overflow: hidden; background: radial-gradient(60% 55% at 26% 60%, rgba(var(--lime-rgb), .07), transparent 70%), var(--bg); }
.sci-hero-in { min-height: calc(100svh - var(--header-h) - var(--announce-h)); max-height: 940px; display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr); align-items: center; gap: clamp(40px, 5vw, 88px); padding: clamp(48px, 7vh, 96px) max(40px, calc((100vw - 1240px) / 2)) clamp(48px, 7vh, 96px) 0; }
.sci-hero-copy { order: 2; }
.sci-hero h1 { font-size: clamp(46px, 5.6vw, 92px); line-height: .98; letter-spacing: -.02em; text-wrap: balance; }
.sci-hero h1 em { color: var(--gold-soft); }
.sci-hero-sub { margin-top: 22px; max-width: 30ch; font: 400 clamp(20px, 1.8vw, 25px)/1.35 var(--serif); color: var(--lead); }
.beams { display: grid; gap: clamp(36px, 6vh, 72px); padding-left: max(40px, calc((100vw - 1240px) / 2)); }
.beam-row { display: grid; gap: 6px; }
.beam-row svg { display: block; width: 100%; height: auto; overflow: visible; }
.beam-cap { display: grid; gap: 4px; }
.beam-cap b { font: 400 clamp(28px, 2.6vw, 40px)/1 var(--serif); color: var(--cream); }
.beam-cap em { color: var(--lime); font-style: italic; }

.beam-halo-enc { stroke: rgba(var(--lime-rgb), .22); stroke-width: 26; filter: blur(10px); }
.beam-core { stroke: var(--lime); stroke-width: 2.5; filter: drop-shadow(0 0 6px rgba(var(--lime-rgb), .9)); }
.beam-wave { fill: none; stroke: var(--lime); stroke-linecap: round; stroke-dasharray: 6 10; animation: beam-flow 2.8s linear infinite; }
.beam-wave.w1 { stroke-width: 1.8; opacity: .9; }
.beam-wave.w2 { stroke-width: 1.3; opacity: .5; animation-duration: 3.6s; }
.beam-wave.w3 { stroke-width: 1; opacity: .3; animation-duration: 4.4s; }
.beam-text-path { fill: none; stroke: none; }
.beam-words text { font: 500 12.5px var(--sans); letter-spacing: .05em; fill: var(--lime-soft); }
.beam-bit { fill: #fff; filter: drop-shadow(0 0 5px var(--lime)) drop-shadow(0 0 2px var(--lime)); }
.beam-glow { fill: url(#tip-glow); color: var(--lime); pointer-events: none; }
@keyframes beam-flow { to { stroke-dashoffset: -64; } }

/* Why it works: two tuning forks. */
.fork { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(36px, 6vw, 90px); align-items: center; }
.fork .sci-lead { margin-top: 22px; }
.fork-turn { color: var(--cream); }
.fork-fig { margin: 0; }
.fork-fig svg { width: 100%; height: auto; display: block; overflow: visible; }
.fork path, .fork line { fill: none; stroke: #c9cdc6; stroke-width: 7; stroke-linecap: round; }
.fork-a { transform-box: fill-box; transform-origin: 50% 100%; animation: fork-hum .12s ease-in-out infinite alternate; }
.fork-b { transform-box: fill-box; transform-origin: 50% 100%; animation: fork-hum .12s ease-in-out infinite alternate, fork-wake 3.2s ease-in-out infinite; }
.fork-a path { stroke: var(--lime); filter: drop-shadow(0 0 8px rgba(var(--lime-rgb), .6)); }
.ring { fill: none; stroke: var(--lime); stroke-width: 2.5; stroke-linecap: round; opacity: 0; animation: ring-travel 3.2s cubic-bezier(.25, .6, .35, 1) infinite; }
.ring.r2 { animation-delay: 1.07s; }
.ring.r3 { animation-delay: 2.13s; }
@keyframes fork-hum { to { transform: scaleX(1.035); } }
@keyframes fork-wake { 0%, 30% { opacity: .45; } 60%, 100% { opacity: 1; } }
@keyframes ring-travel { 0% { opacity: 0; transform: translateX(0); } 12% { opacity: .9; } 85% { opacity: .25; } 100% { opacity: 0; transform: translateX(120px); } }

/* The science underneath: heading and Pierre's line on the left, three facts as drawn rows on the right. */
.base-in { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(40px, 6vw, 96px); align-items: center; }
.base-quote { margin-top: clamp(32px, 4vw, 48px); max-width: 26ch; }
.base { list-style: none; margin: 0; padding: 0; }
.base li { display: grid; grid-template-columns: 140px 1fr; gap: clamp(20px, 3vw, 36px); align-items: center; padding: clamp(22px, 2.6vw, 32px) 0; border-top: 1px solid var(--line); }
.base li:last-child { border-bottom: 1px solid var(--line); }
.base b { display: block; font: 500 clamp(24px, 2.1vw, 30px)/1.15 var(--serif); color: var(--cream); margin-bottom: 6px; }
.base span { display: block; color: var(--muted); max-width: 40ch; }
.base-fig { display: block; width: 100%; height: auto; overflow: hidden; }
.bf-step path { fill: none; stroke: var(--lime); stroke-width: 1.6; stroke-linecap: round; opacity: .85; }
.bf-step { animation: bf-step 2.2s linear infinite; }
.bf-fiber { fill: rgba(var(--lime-rgb), .05); stroke: var(--line-strong); }
.bf-pulse { stroke: var(--lime); stroke-width: 3; stroke-linecap: round; stroke-dasharray: 12 7 3 7 3 7 12 13; filter: drop-shadow(0 0 4px rgba(var(--lime-rgb), .8)); animation: bf-pulse 1.8s linear infinite; }
.bf-halo { fill: rgba(var(--lime-rgb), .08); }
.bf-cell { fill: none; stroke: rgba(var(--lime-rgb), .5); stroke-width: 1.4; }
.bf-nuc { fill: rgba(var(--lime-rgb), .08); stroke: rgba(var(--lime-rgb), .45); stroke-width: 1.2; }
.bf-sparks circle { fill: var(--lime); opacity: .2; filter: drop-shadow(0 0 3px var(--lime)); animation: bf-spark 3.2s ease-in-out infinite; }
.bf-sparks circle:nth-child(2) { animation-delay: .5s; } .bf-sparks circle:nth-child(3) { animation-delay: 1.1s; } .bf-sparks circle:nth-child(4) { animation-delay: 1.7s; }
.bf-sparks circle:nth-child(5) { animation-delay: 2.2s; } .bf-sparks circle:nth-child(6) { animation-delay: 2.6s; } .bf-sparks circle:nth-child(7) { animation-delay: .8s; }
@keyframes bf-step { to { transform: translateX(28px); } }
@keyframes bf-pulse { to { stroke-dashoffset: -64; } }
@keyframes bf-spark { 50% { opacity: .9; } }

/* Theme-aware content: ON copy and art by default, IN copy and art in IN mode. */
.when-in { display: none !important; }
:root[data-theme="in"] .when-in { display: block !important; }
:root[data-theme="in"] .when-on { display: none !important; }

/* The idea: a material's signature, Pierre's encoding, what stays the same, what the beam carries. */
.sig > .wrap { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); column-gap: clamp(48px, 7vw, 108px); row-gap: 36px; align-items: start; }
.sig-head { max-width: 54ch; }
.sig-head .sci-lead { margin-top: 20px; max-width: 54ch; }

.sig-diagram { grid-column: 2; grid-row: 1 / span 2; display: grid; gap: 20px; align-items: start; padding-top: 44px; }
.sig-step { display: grid; grid-template-columns: 48px minmax(0, 1fr); column-gap: 20px; row-gap: 8px; align-content: start; }
.sig-fig { width: 46px; height: 46px; fill: none; stroke: var(--lime); stroke-width: 2; stroke-linecap: round; filter: drop-shadow(0 0 6px rgba(var(--lime-rgb), .35)); }
.sig-dot { fill: var(--lime); stroke: none; }
.sig-fig { grid-row: 1 / span 2; }
.sig-step-t { font: 500 21px/1.25 var(--serif); color: var(--cream); }
.sig-step-n { grid-column: 2; margin: 0; max-width: 34ch; color: var(--muted); font-size: 16px; line-height: 1.6; }
.sig-arrow { padding-left: 15px; color: var(--dim); }
.sig-arrow svg { width: 16px; height: 10px; display: block; }

.sig-specs { grid-column: 1; max-width: 56ch; }
.sig-specs .eyebrow { margin-bottom: 18px; }
.enc-list { margin: 0; display: grid; gap: 18px; }
.enc-list div { display: grid; grid-template-columns: 9.5em 1fr; gap: 16px; padding-top: 16px; border-top: 1px solid var(--line); }
.enc-list div:first-child { padding-top: 0; border-top: 0; }
.enc-list dt { font-size: 12px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--dim); padding-top: 4px; }
.enc-list dd { margin: 0; color: var(--lead); font-size: 17px; font-variant-numeric: lining-nums; }
.enc-list .enc-int { font: italic 400 21px/1.35 var(--serif); color: var(--gold-soft); }

/* One media row: native proportions on desktop, a manually scrollable row on phones. */
.sci-use-break { display: grid; grid-template-columns: 1.56fr 1fr 1.56fr 1fr; gap: clamp(14px, 2vw, 28px); margin-block: 0 clamp(24px, 3vw, 48px); }
.sci-use-break:focus-visible { outline: 2px solid var(--lime); outline-offset: 5px; }
.sci-use-break figure { margin: 0; min-width: 0; }
.sci-use-break figcaption { margin-top: 10px; font-size: 11.5px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--dim); text-align: center; }
.use-still img { display: block; width: 100%; aspect-ratio: 5 / 4; object-fit: cover; border-radius: 16px; }
.use-clip video { display: block; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 16px; background: var(--panel); cursor: pointer; }
@media (max-width: 760px) {
  .sci-use-break { display: flex; flex-wrap: nowrap; overflow-x: auto; gap: 16px; padding-bottom: 12px; scroll-snap-type: x proximity; scrollbar-width: thin; scrollbar-color: var(--line-strong) transparent; }
  .sci-use-break figure { flex-shrink: 0; scroll-snap-align: start; }
  .sci-use-break .use-still { flex-basis: 85%; }
  .sci-use-break .use-clip { flex-basis: 54.4%; }
}


/* Fifteen seconds: short ticks beside real footage. */
.secs { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 90px); align-items: center; }
.timeline { list-style: none; padding: 0; margin-top: 40px; display: grid; gap: 26px; }
.tick { display: grid; grid-template-columns: 96px 1fr; gap: 18px; align-items: baseline; padding-top: 22px; position: relative; }
.tick::before, .tick::after { content: ''; position: absolute; left: 0; top: 0; height: 3px; border-radius: 3px; }
.tick::before { right: 0; background: rgba(var(--lime-rgb), .16); }
.tick::after { width: var(--fill, 0%); background: var(--lime); box-shadow: 0 0 10px rgba(var(--lime-rgb), .7); transition: width 1.4s var(--ease) .2s; }
.tick:not(.is-in)::after { width: 0; }
.tick:nth-child(1) { --fill: 8%; }
.tick:nth-child(2) { --fill: 60%; }
.tick:nth-child(3) { --fill: 100%; }
.tick-t { font: 500 clamp(26px, 2.4vw, 34px)/1 var(--sans); letter-spacing: -.02em; color: var(--gold-soft); font-variant-numeric: lining-nums tabular-nums; white-space: nowrap; }
.tick h3 { font-size: 18px; font-weight: 600; margin-bottom: 2px; }
.tick p { color: var(--muted); }
.secs-media { margin: 0; border-radius: 26px; overflow: hidden; aspect-ratio: 4 / 5; background: var(--panel); }
.secs-media img { width: 100%; height: 100%; object-fit: cover; }

/* Pierre's words lead a dark, ON/IN-aware chapter; the portrait serves as attribution only. */
.pierre-head { max-width: 760px; }
.pierre-head h2 { margin-top: 10px; font: 500 clamp(34px, 4vw, 56px)/1.06 var(--serif); color: var(--cream); letter-spacing: -.01em; text-wrap: balance; }
.pierre-head h2 em { color: var(--gold-soft); }
.pierre-head .sci-lead { margin-top: 18px; max-width: 52ch; text-wrap: pretty; }
.nowrap { white-space: nowrap; }
.pierre-steps { list-style: none; margin: clamp(40px, 5vw, 64px) 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(28px, 4vw, 56px); }
.pierre-step { display: grid; grid-template-columns: 44px minmax(0, 1fr); column-gap: 16px; row-gap: 14px; align-content: start; padding-top: 24px; border-top: 1px solid var(--line-strong); }
.pierre-step .sig-fig { grid-row: auto; width: 40px; height: 40px; }
.pierre-step .sig-step-t { margin: 0; align-self: center; }
.pierre-step .sig-step-n { grid-column: 1 / -1; max-width: none; text-wrap: pretty; }
.pierre-quote { margin: clamp(48px, 6vw, 80px) 0 0; padding: clamp(28px, 3vw, 40px) 0 0; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px 48px; }
.pierre-quote > p { margin: 0; max-width: 24ch; font: italic 400 clamp(26px, 2.8vw, 38px)/1.2 var(--serif); color: var(--gold-soft); text-wrap: balance; }
.pierre-quote .founder-byline { margin-top: 0; }
@media (max-width: 980px) { .pierre-steps { grid-template-columns: 1fr; } }
.sci-founder { padding: clamp(64px, 7vw, 104px) 0; background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.founder-byline { display: flex; align-items: center; gap: 18px; margin-top: 20px; }
.sci .founder-byline img { width: 72px; height: 72px; object-fit: cover; object-position: 50% 25%; border-radius: 50%; }
.founder-byline cite { display: block; font: 500 16px/1.4 var(--sans); font-style: normal; color: var(--cream); }
.founder-byline span { display: block; margin-top: 3px; font: 500 11px/1.4 var(--sans); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
@media (min-width: 761px) { .sci-quote { margin-top: 26px; font: italic 400 clamp(24px, 2.4vw, 32px)/1.25 var(--serif); color: var(--gold-soft); max-width: 30ch; }
.sci-quote cite { display: block; margin-top: 10px; font: 500 13px var(--sans); font-style: normal; letter-spacing: .04em; color: var(--dim); }

/* What we've observed */
.observed { margin-top: 44px; display: grid; grid-template-columns: 1.3fr 1fr; gap: clamp(24px, 4vw, 56px); align-items: start; }
.obs-main { margin: 0; }
.obs-pics { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.obs-pics figure { margin: 0; }
.obs-pics img { width: 100%; aspect-ratio: 8 / 5; object-fit: cover; border-radius: 18px; }
.obs-pics figcaption { margin-top: 8px; text-align: center; font-size: 11.5px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--dim); }
.obs-main figcaption.obs-cap, .obs-list li { color: var(--muted); }
.obs-main figcaption.obs-cap { margin-top: 18px; }
.observed b { display: block; font: 500 clamp(22px, 2vw, 28px)/1.15 var(--serif); color: var(--cream); margin: 6px 0 4px; }
.status { font-size: 11.5px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--lime-soft); }
.obs-list { list-style: none; padding: 0; display: grid; gap: 0; }
.obs-list li { padding: 22px 0; border-top: 1px solid var(--line); }
.obs-list li:first-child { padding-top: 0; border-top: 0; }
.obs-list .obs-note { opacity: .78; }
.obs-list .obs-cta { padding-top: 26px; }


.closing .closing-links { display: flex; flex-wrap: wrap; gap: 14px 22px; justify-content: center; align-items: center; }

/* Draft marker, so nobody mistakes the preview for the live site. */

.sci-reveal { opacity: 0; transform: translateY(22px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.sci-reveal.is-in { opacity: 1; transform: none; }
html:not(.js) .sci-reveal { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .secs, .observed, .base-in, .fork, .sig > .wrap { grid-template-columns: 1fr; }
  .sig-diagram { grid-column: auto; grid-row: auto; padding-top: 0; }
  .sig-specs { grid-column: auto; }
  .sci-hero-in { grid-template-columns: 1fr; align-content: center; max-height: none; padding-left: max(40px, calc((100vw - 1240px) / 2)); padding-right: 0; }
  .sci-hero-copy { order: 0; }
  .beams { padding-left: 0; padding-right: 40px; }
  .fork-fig { max-width: 420px; }
      .secs-media { aspect-ratio: 4 / 3; }
}
@media (max-width: 760px) {
  .sci-hero-in { padding: 32px 0 48px 18px; gap: clamp(40px, 10svh, 96px); }
  .sci-hero h1 { font-size: clamp(42px, 13.5vw, 64px); }
  .beams { gap: 30px; padding-right: 18px; }
  .beam-words text { font-size: 21px; }
  .enc-list div { grid-template-columns: 1fr; gap: 4px; }
  .base li { grid-template-columns: 96px 1fr; gap: 18px; }
  .tick { grid-template-columns: 78px 1fr; gap: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  .beam-wave, .fork-a, .fork-b, .ring, .bf-step, .bf-pulse, .bf-sparks circle { animation: none; }
  .bf-sparks circle { opacity: .6; }
  .beam-bit { display: none; }
  .ring:not(.r2):not(.r3) { opacity: .6; transform: translateX(40px); }
  .tick::after { transition: none; }
  .tick:not(.is-in)::after { width: var(--fill); }
  .sci-reveal { opacity: 1; transform: none; transition: none; }
}