:root {
  color-scheme: light;
  --ink: #122e50;
  --muted: #647487;
  --paper: #fff;
  --white: #fff;
  --line: #e2e8ee;
  --green: #43b7ce;
  --deep: #123456;
  --accent: #32a6c1;
  --serif: Inter, "Avenir Next", Avenir, "Segoe UI", sans-serif;
  font-family: Inter, "Avenir Next", Avenir, "Segoe UI", Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; }
a { color: inherit; text-decoration: none; }
a:hover { color: #167b9c; }
button, input, select { font: inherit; }
button, a, input, select { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #a65c22; outline-offset: 3px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; z-index: 10; left: 1rem; top: -5rem; padding: .8rem 1rem; background: var(--white); }
.skip-link:focus { top: 1rem; }

.preview-bar { min-height: 30px; padding: 7px 4vw; background: #f4f8fb; color: #355774; text-align: center; font-size: .7rem; letter-spacing: .025em; }
.site-header { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: 0 5.5vw; border-bottom: 1px solid var(--line); background: var(--white); }
.brand { display: inline-flex; align-items: center; gap: .62rem; color: var(--ink); font-size: .85rem; font-weight: 800; letter-spacing: .16em; white-space: nowrap; }
.brand-logo { display: block; width: 180px; height: 70px; object-fit: cover; object-position: center; }
.site-header nav, .language-picker { display: flex; align-items: center; gap: clamp(.8rem, 2vw, 2rem); }
.site-header nav a, .language-picker { font-size: .77rem; font-weight: 550; }
.cart-link { white-space: nowrap; }
.cart-link span { display: inline-grid; min-width: 1.35rem; height: 1.35rem; place-items: center; border-radius: 50%; background: var(--green); color: var(--deep); font-size: .65rem; }
.language-picker { gap: .5rem; color: var(--muted); }
.language-picker span { margin-right: .3rem; font-size: .65rem; text-transform: uppercase; letter-spacing: .12em; }
.language-picker a { padding: .35rem .15rem; border-bottom: 1px solid transparent; }
.language-picker a:hover, .language-picker a[aria-current="page"] { border-color: var(--accent); color: var(--ink); }

.hero { position: relative; isolation: isolate; min-height: 570px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 4vw; padding: 4.5rem 8vw; overflow: hidden; background: radial-gradient(ellipse at 78% 52%, #164b70 0, #10395d 27%, transparent 57%), linear-gradient(112deg, #092849, #0d3456 62%, #0b2a4a); color: #fff; }
.hero::before, .hero::after { position: absolute; z-index: -1; inset: 0; content: ""; pointer-events: none; }
.hero::before { opacity: .34; background-image: radial-gradient(circle, #80d9eb 1px, transparent 1.5px), radial-gradient(circle, #80d9eb 1px, transparent 1.5px); background-position: 0 0, 31px 47px; background-size: 83px 83px, 127px 127px; mask-image: linear-gradient(90deg, transparent 5%, #000 100%); }
.hero::after { inset: auto -12% -44% 35%; height: 70%; border: 1px solid #5dc9e31c; border-radius: 50%; box-shadow: 0 0 0 42px #5dc9e30a, 0 0 0 86px #5dc9e308; transform: rotate(-12deg); }
.hero-copy { position: relative; z-index: 1; max-width: 620px; animation: hero-copy-in .8s both; }
.hero .eyebrow { color: #70d5e8; }
.eyebrow { margin: 0 0 .85rem; color: #167b9c; font-size: .68rem; font-weight: 750; letter-spacing: .13em; line-height: 1.5; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: var(--serif); font-weight: 400; letter-spacing: -.035em; }
.hero h1 { max-width: 650px; margin: 0 0 1.5rem; font-size: clamp(3.25rem, 5.9vw, 5.9rem); line-height: .99; }
.hero-lede { max-width: 540px; margin-bottom: 2rem; color: #d2e2ee; font-size: 1.04rem; line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: .8rem 1.25rem; border: 1px solid transparent; font-size: .76rem; font-weight: 700; line-height: 1.4; text-align: center; }
.button-dark { background: var(--deep); color: white; }
.button-dark:hover { background: #164b70; color: white; }
.button-light { border-color: #aebbb2; background: transparent; }
.button-outline { border-color: #8ea29a; }
.button-disabled { width: 100%; cursor: not-allowed; background: #e9ece7; border-color: #d7ddd7; color: #4b5e57; }
.hero .button-dark { border-color: #55c6dc; background: #35a9c3; color: #062747; }
.hero .button-dark:hover { border-color: #a0eff7; background: #78dbea; color: #062747; }
.hero .button-light { border-color: #78a8c3; color: #e2f1f8; }
.hero .button-light:hover { border-color: #70d5e8; background: #ffffff12; color: #fff; }
.hero-visual { position: relative; min-width: 0; min-height: 410px; display: grid; align-content: center; justify-items: center; margin: 0; animation: hero-visual-in 1s .12s both; }
.molecule-scene { position: relative; width: min(100%, 470px); aspect-ratio: 1; display: grid; place-items: center; perspective: 900px; }
.molecule-halo { position: absolute; width: 48%; aspect-ratio: 1; border: 1px solid #7fe6f044; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #73e4ed6b, #2d9cbe30 38%, #14618c24 67%, transparent 72%); box-shadow: 0 0 45px #47cde333, inset 0 0 40px #73ddeb1f; animation: halo-breathe 5s ease-in-out infinite; }
.molecule-orbit { position: absolute; width: 80%; height: 35%; border: 1px solid #91e1f264; border-radius: 50%; transform-style: preserve-3d; }
.molecule-orbit-one { transform: rotateX(68deg) rotateZ(-24deg); animation: orbit-one 19s linear infinite; }
.molecule-orbit-two { width: 90%; height: 44%; border-color: #55b9dd70; transform: rotateX(70deg) rotateY(58deg) rotateZ(27deg); animation: orbit-two 26s linear infinite; }
.molecule-orbit i { position: absolute; top: 50%; left: -5px; width: 10px; height: 10px; border: 2px solid #d8fcff; border-radius: 50%; background: #44d3e8; box-shadow: 0 0 17px #65e6f5; }
.molecule-orbit-two i { top: auto; right: 7%; bottom: -5px; left: auto; width: 8px; height: 8px; background: #fff; }
.molecule-model { position: relative; z-index: 1; width: 75%; overflow: visible; filter: drop-shadow(0 0 17px #42c5dd5c); animation: molecule-float 6s ease-in-out infinite; }
.molecule-bonds { fill: none; stroke: #88e3f2; stroke-linecap: round; stroke-width: 2.2; opacity: .68; }
.atom { stroke: #b9f6fb; stroke-width: 2; }
.atom-main { fill: #38b8d2; }
.atom-small { fill: #7cd9e8; }
.atom-center { fill: #e0fcff; filter: drop-shadow(0 0 8px #fff); }
.scene-coordinate { position: absolute; z-index: 2; color: #a9d6e8; font: 600 .56rem/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .16em; }
.scene-coordinate-one { top: 17%; right: 9%; }
.scene-coordinate-two { bottom: 17%; left: 2%; color: #72b6cf; font-size: .48rem; }
.scene-spark { position: absolute; width: 4px; height: 4px; border-radius: 50%; background: #baf8ff; box-shadow: 0 0 12px 3px #5cd8ed; animation: spark-pulse 2.8s ease-in-out infinite; }
.scene-spark-one { top: 21%; left: 22%; }
.scene-spark-two { right: 17%; bottom: 26%; animation-delay: -.9s; }
.scene-spark-three { top: 39%; right: 9%; width: 3px; height: 3px; animation-delay: -1.7s; }
.hero-caption { position: absolute; bottom: 2%; margin: 0; color: #8ebbd0; font-size: .62rem; letter-spacing: .2em; text-align: center; text-transform: uppercase; }
@keyframes hero-copy-in { from { opacity: 0; transform: translate3d(0, 18px, 0); } to { opacity: 1; transform: translate3d(0, 0, 0); } }
@keyframes hero-visual-in { from { opacity: 0; transform: translate3d(0, 12px, 0) scale(.96); } to { opacity: 1; transform: translate3d(0, 0, 0) scale(1); } }
@keyframes molecule-float { 0%, 100% { transform: translateY(0) rotateX(0deg) rotateY(-7deg); } 50% { transform: translateY(-10px) rotateX(4deg) rotateY(7deg); } }
@keyframes halo-breathe { 0%, 100% { transform: scale(.96); opacity: .72; } 50% { transform: scale(1.05); opacity: 1; } }
@keyframes orbit-one { from { transform: rotateX(68deg) rotateZ(-24deg); } to { transform: rotateX(68deg) rotateZ(336deg); } }
@keyframes orbit-two { from { transform: rotateX(70deg) rotateY(58deg) rotateZ(27deg); } to { transform: rotateX(70deg) rotateY(58deg) rotateZ(-333deg); } }
@keyframes spark-pulse { 0%, 100% { opacity: .35; transform: scale(.7); } 50% { opacity: 1; transform: scale(1.5); } }

.notice-band { display: flex; align-items: flex-start; gap: .95rem; padding: 1.15rem 7vw; background: #eef5f8; color: #294760; }
.notice-band p { margin: 0; font-size: .81rem; line-height: 1.65; }
.notice-icon { flex: 0 0 22px; width: 22px; height: 22px; display: grid; place-items: center; border: 1px solid #32a6c1; border-radius: 50%; font-family: var(--serif); font-weight: 700; }
.research-disclaimer { display: grid; grid-template-columns: 42px minmax(0, 1fr); gap: 1.1rem; margin: 2rem 7vw 0; padding: clamp(1.25rem, 3vw, 2.2rem); border: 1px solid #e4d7d9; border-left: 4px solid #c8323e; background: #fff; color: #242b32; }
.disclaimer-mark { width: 32px; height: 32px; display: grid; place-items: center; border: 1.5px solid #c8323e; border-radius: 50%; color: #c8323e; font-weight: 800; }
.disclaimer-content { max-width: 1050px; }
.disclaimer-content .eyebrow { margin-bottom: .4rem; }
.disclaimer-content h2 { margin: 0 0 .85rem; color: #c8323e; font-size: clamp(1.45rem, 2.4vw, 2rem); letter-spacing: -.025em; line-height: 1.2; }
.disclaimer-content h3 { margin: 1.1rem 0 .25rem; color: #242b32; font-size: .88rem; font-weight: 750; }
.disclaimer-content p, .disclaimer-content li { color: #40596c; font-size: .84rem; line-height: 1.7; }
.disclaimer-content p { margin: 0 0 .65rem; }
.disclaimer-content ul { display: grid; gap: .25rem; margin: .6rem 0 .9rem; padding-left: 1.2rem; }
.disclaimer-content li::marker { color: #1683a3; }
.disclaimer-content .disclaimer-close { margin: 0; padding-top: .75rem; border-top: 1px solid #d9e6ed; font-size: .78rem; }
.section-block { padding: 5.5rem 7vw; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1.5rem; margin-bottom: 2rem; }
.section-heading h2, .documentation-panel h2 { margin-bottom: 0; font-size: clamp(2rem, 3.6vw, 3.35rem); }
.text-link { display: inline-flex; align-items: center; gap: .5rem; padding-bottom: .3rem; border-bottom: 1px solid #90a095; font-size: .78rem; font-weight: 700; }
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.15rem; }
.product-card { min-width: 0; border: 1px solid #e7edf2; background: var(--white); transition: box-shadow .2s ease, transform .2s ease; }
.product-card:hover { transform: translateY(-2px); box-shadow: 0 10px 30px #183c5a12; }
.product-image-link { display: block; overflow: hidden; aspect-ratio: 1 / 1; background: #f7f9fa; }
.product-image { display: block; width: 100%; height: 100%; object-fit: contain; transition: transform .35s ease; }
.product-image-link:hover .product-image { transform: scale(1.035); }
.product-card-copy { padding: 1.1rem 1rem 1.25rem; }
.product-card h3 { min-height: 2.7em; margin: 0 0 .75rem; font-family: var(--serif); font-size: 1.3rem; font-weight: 400; line-height: 1.3; }
.product-meta, .availability-meta { margin: 0 0 .35rem; color: #42564f; font-size: .72rem; line-height: 1.5; }
.availability-meta { margin-bottom: 1rem; color: var(--muted); }
.product-card .eyebrow { min-height: 1.4em; margin-bottom: .4rem; font-size: .56rem; }
.product-card .text-link { font-size: .7rem; }
.image-placeholder { display: grid; place-items: center; color: #85947f; font-family: var(--serif); font-size: 3rem; }
.documentation-panel { display: flex; align-items: end; justify-content: space-between; gap: 3rem; padding: 4.5rem 9vw; background: #f3f7fa; color: var(--ink); }
.documentation-panel h2 { max-width: 580px; margin: 0 0 1rem; }
.documentation-panel p:not(.eyebrow) { max-width: 630px; margin: 0; color: var(--muted); font-size: .88rem; line-height: 1.75; }
.documentation-panel .eyebrow { color: #147a9c; }
.documentation-panel .button { flex-shrink: 0; color: var(--ink); }

.page-hero { padding: 4rem 9vw 3.25rem; background: #f6f9fb; }
.page-hero h1 { max-width: 850px; margin: 0 0 1rem; font-size: clamp(2.8rem, 5vw, 5rem); line-height: 1.05; }
.page-hero > p:last-child { max-width: 750px; margin: 0; color: var(--muted); font-size: 1rem; line-height: 1.8; }
.page-copy { max-width: 750px; color: var(--muted); font-size: 1rem; line-height: 1.8; }
.page-copy p { margin: 0 0 1rem; }
.page-copy p:last-child { margin-bottom: 0; }
.page-copy a { color: var(--ink); text-decoration: underline; text-underline-offset: .15em; }
.terms-hero { padding: 4.5rem 9vw 3.5rem; background: linear-gradient(112deg, #092849, #103c60 68%, #0b2a4a); color: #fff; }
.terms-hero .eyebrow { color: #82d9e9; }
.terms-hero h1 { max-width: 900px; margin: 0 0 1rem; font-size: clamp(2.8rem, 5vw, 5rem); line-height: 1.05; overflow-wrap: anywhere; }
.terms-hero > p:last-child { max-width: 790px; margin: 0; color: #d7e6ef; font-size: 1.05rem; line-height: 1.8; }
.terms-status { display: flex; gap: 1rem; max-width: 1120px; margin: 2rem auto 0; padding: 1.4rem 1.6rem; border: 1px solid #d6c18c; background: #fbf8ed; }
.terms-status > span { flex: 0 0 auto; color: #765d1c; font-size: 1.25rem; font-weight: 800; }
.terms-status h2 { margin: 0 0 .45rem; font-size: 1.15rem; }
.terms-status p { margin: 0; color: var(--muted); line-height: 1.7; }
.terms-layout { max-width: 1240px; min-width: 0; margin: 0 auto; padding: 2rem 7vw 6rem; }
.terms-sections { display: grid; min-width: 0; gap: .85rem; }
.terms-section { min-width: 0; padding: 1.55rem 1.7rem; background: #f6f9fb; scroll-margin-top: 2rem; overflow-wrap: anywhere; }
.terms-section .eyebrow { margin: 0 0 .45rem; color: #147a9c; }
.terms-section h2 { margin: 0 0 .65rem; font-size: 1.28rem; line-height: 1.35; }
.terms-section > p:last-child { margin: 0; color: var(--muted); line-height: 1.75; }
.references-hero { position: relative; isolation: isolate; overflow: hidden; padding: 4.5rem 9vw 4rem; background: radial-gradient(ellipse at 88% 38%, #164b70 0, #10395d 26%, transparent 56%), linear-gradient(112deg, #092849, #0d3456 62%, #0b2a4a); color: #fff; }
.references-hero::after { position: absolute; z-index: -1; right: -7rem; bottom: -24rem; width: 42rem; height: 42rem; border: 1px solid #69d2e42e; border-radius: 50%; box-shadow: 0 0 0 52px #69d2e414, 0 0 0 104px #69d2e40b; content: ""; }
.references-hero-copy { max-width: 900px; }
.references-hero .eyebrow { color: #70d5e8; }
.references-hero h1 { max-width: 800px; margin: 0 0 1rem; font-size: clamp(2.8rem, 5.7vw, 5rem); line-height: 1; }
.references-hero-copy > p:not(.eyebrow) { max-width: 780px; margin: 0; color: #d2e2ee; font-size: 1rem; line-height: 1.8; }
.references-hero-copy .references-total { margin-top: 1.5rem !important; color: #82d9e9 !important; font-size: .72rem !important; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.references-index { position: sticky; z-index: 4; top: 0; display: flex; gap: .5rem; overflow-x: auto; padding: .85rem 7vw; border-bottom: 1px solid #dce7ed; background: #ffffffed; backdrop-filter: blur(12px); }
.references-index-link { flex: 0 0 auto; display: inline-flex; align-items: center; gap: .45rem; padding: .55rem .75rem; border: 1px solid #d8e5eb; border-radius: 999px; color: #274c67; font-size: .7rem; font-weight: 650; }
.references-index-link:hover { border-color: #32a6c1; color: #126d8d; }
.references-index-link span { display: inline-grid; min-width: 1.25rem; height: 1.25rem; place-items: center; border-radius: 50%; background: #e9f5f8; color: #167b9c; font-size: .58rem; }
.references-guide { padding: 4.5rem 7vw 5rem; background: #f3f8fb; }
.references-guide-heading { max-width: 870px; margin-bottom: 2rem; }
.references-guide-heading h2, .references-collections-heading h2 { margin: 0 0 .85rem; color: #123456; font-size: clamp(2rem, 3.5vw, 3rem); }
.references-guide-heading > p:last-child { max-width: 800px; margin: 0; color: #596e7d; font-size: .9rem; line-height: 1.8; }
.reference-guide-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .8rem; max-width: 1380px; margin: 0 auto; }
.reference-guide-card { min-width: 0; padding: 1.25rem; border: 1px solid #dce8ee; background: #fff; }
.reference-guide-step { display: inline-grid; width: 2rem; height: 2rem; place-items: center; margin-bottom: 1.5rem; border: 1px solid #70cadd; border-radius: 50%; color: #167b9c; font: 700 .63rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.reference-guide-card h3 { margin: 0 0 .6rem; color: #123456; font-size: .98rem; line-height: 1.4; }
.reference-guide-card p { margin: 0; color: #596e7d; font-size: .78rem; line-height: 1.72; }
.references-collections { padding: 4.5rem 7vw 1rem; }
.references-collections-heading { max-width: 1380px; margin: 0 auto 1.5rem; }
.reference-group { max-width: 1380px; margin: 0 auto; padding: 2rem 0; border-top: 1px solid #dce6ec; scroll-margin-top: 5rem; }
.reference-group-heading { display: flex; align-items: baseline; gap: .8rem 1.2rem; margin-bottom: 1rem; }
.reference-group-heading .eyebrow { flex: 0 0 auto; margin: 0; font-size: .58rem; }
.reference-group-heading h2 { flex: 1; margin: 0; color: #123456; font-size: clamp(1.5rem, 2.4vw, 2.1rem); }
.reference-group-heading > a { flex: 0 0 auto; color: #176c89; font-size: .72rem; font-weight: 700; }
.reference-group-intro { max-width: 900px; margin: 0 0 1rem; color: #607585; font-size: .8rem; line-height: 1.7; }
.citation-cards { display: grid; gap: .65rem; }
.citation-card { display: grid; grid-template-columns: 2.5rem minmax(0, 1fr) auto; align-items: center; gap: .75rem; padding: 1rem 1.1rem; border: 1px solid #e0e9ee; background: #fff; }
.citation-number { display: grid; width: 2rem; height: 2rem; place-items: center; border-radius: 50%; background: #eaf5f8; color: #176c89; font: 700 .66rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.citation-source { margin: 0 0 .3rem; color: #177c9a; font-size: .59rem; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.citation-card h3 { margin: 0; color: #183e5c; font-size: .92rem; line-height: 1.5; }
.citation-card h3 a:hover { color: #117f9f; text-decoration: underline; text-underline-offset: .15em; }
.citation-open { display: inline-flex; align-items: center; gap: .35rem; color: #176c89; font-size: .68rem; font-weight: 700; white-space: nowrap; }
.references-empty { margin: 0; padding: 1.2rem; border: 1px dashed #c2d5df; color: #607585; font-size: .82rem; line-height: 1.7; }
.references-limits { margin: 2rem 7vw 4rem; padding: 1.5rem 1.7rem; border-left: 4px solid #32a6c1; background: #eef6f9; }
.references-limits .eyebrow { margin-bottom: .5rem; }
.references-limits > p:last-child { max-width: 1100px; margin: 0; color: #40596c; font-size: .82rem; line-height: 1.75; }
.about-hero { position: relative; isolation: isolate; min-height: 390px; display: flex; align-items: center; overflow: hidden; padding: 4.5rem 9vw; background: radial-gradient(ellipse at 87% 48%, #164b70 0, #10395d 25%, transparent 53%), linear-gradient(112deg, #092849, #0d3456 62%, #0b2a4a); color: #fff; }
.about-hero::after { position: absolute; z-index: -1; right: -6rem; bottom: -20rem; width: 36rem; height: 36rem; border: 1px solid #69d2e42e; border-radius: 50%; box-shadow: 0 0 0 48px #69d2e414, 0 0 0 96px #69d2e40b; content: ""; }
.about-hero-copy { position: relative; z-index: 1; max-width: 760px; }
.about-hero .eyebrow { color: #70d5e8; }
.about-hero h1 { max-width: 720px; margin: 0 0 1rem; font-size: clamp(3rem, 6vw, 5.7rem); line-height: .98; }
.about-lead { max-width: 610px; margin: 0; color: #d2e2ee; font-size: clamp(1.05rem, 1.8vw, 1.3rem); line-height: 1.65; }
.about-hero-mark { position: absolute; right: 12%; top: 50%; width: clamp(150px, 19vw, 250px); aspect-ratio: 1; display: grid; place-content: center; justify-items: center; border: 1px solid #72d6e84f; border-radius: 50%; background: radial-gradient(circle at 38% 33%, #54cde22b, #10395d24 66%, transparent 70%); color: #84ddeb; transform: translateY(-50%) rotate(-12deg); }
.about-hero-mark::before, .about-hero-mark::after { position: absolute; inset: 9%; border: 1px solid #72d6e82c; border-radius: 50%; content: ""; transform: rotate(58deg) scaleY(.43); }
.about-hero-mark::after { transform: rotate(-58deg) scaleY(.43); }
.about-hero-mark span { font-size: clamp(4rem, 7vw, 6rem); font-weight: 300; line-height: .95; }
.about-hero-mark small { margin-top: .8rem; color: #a8d6e5; font: 600 .48rem/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .18em; text-align: center; }
.about-intro { max-width: 1020px; margin: 0 auto; padding: 5rem 7vw 4.5rem; }
.about-intro .eyebrow { margin-bottom: 1.2rem; }
.about-statement { max-width: 930px; margin: 0; color: #183e5c; font-size: clamp(1.45rem, 3vw, 2.45rem); font-weight: 400; letter-spacing: -.035em; line-height: 1.43; }
.about-principles-section { padding: 4.5rem 7vw 5.5rem; background: #f3f8fb; }
.about-section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 2rem; }
.about-section-heading .eyebrow { margin: 0; }
.about-section-heading h2 { margin: 0; color: #123456; font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
.about-principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; max-width: 1280px; margin: 0 auto; }
.about-principle { min-width: 0; padding: 1.55rem; border: 1px solid #dce8ee; background: #fff; }
.about-principle-number { display: inline-grid; width: 2.2rem; height: 2.2rem; place-items: center; margin-bottom: 2.1rem; border: 1px solid #76c9da; border-radius: 50%; color: #167b9c; font: 600 .66rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.about-principle h3 { margin: 0 0 .75rem; color: #123456; font-family: var(--serif); font-size: 1.3rem; font-weight: 600; letter-spacing: -.02em; line-height: 1.3; }
.about-principle p { margin: 0; color: #596e7d; font-size: .85rem; line-height: 1.75; }
.about-cta { display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: 4rem 9vw; background: #fff; }
.about-cta > div:first-child { max-width: 660px; }
.about-cta h2 { margin: 0 0 .75rem; color: #123456; font-size: clamp(1.8rem, 3.5vw, 2.7rem); line-height: 1.15; }
.about-cta p:not(.eyebrow) { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.7; }
.about-cta-actions { display: flex; flex-wrap: wrap; gap: .7rem; }
.about-cta .button-light { border-color: #a6bfcc; }
.about-scope-note { margin: 0; padding: 1rem 7vw; border-top: 1px solid #e2e8ee; color: #647487; font-size: .72rem; line-height: 1.6; text-align: center; }
.catalog-tools { padding: 1.75rem 7vw 0; }
.search-field { max-width: 560px; display: flex; align-items: center; gap: .7rem; padding: .8rem 1rem; border: 1px solid #b8c3bb; background: white; }
.search-field input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--ink); }
.search-field > span:last-child { font-size: 1.3rem; }
.filter-list { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1rem; }
.filter-chip { min-height: 37px; padding: .55rem .85rem; border: 1px solid #c8d0c9; border-radius: 999px; background: transparent; color: #42564f; cursor: pointer; font-size: .7rem; }
.filter-chip.active, .filter-chip:hover { border-color: var(--deep); background: var(--deep); color: white; }
.catalog-section { padding-top: 2rem; }
.empty-state { padding: 3rem 1rem; color: var(--muted); text-align: center; }
[hidden] { display: none !important; }

.breadcrumbs { display: flex; flex-wrap: wrap; align-items: center; gap: .65rem; padding: 1.5rem 7vw; color: var(--muted); font-size: .72rem; }
.breadcrumbs [aria-current] { color: var(--ink); }
.product-detail { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr); align-items: start; gap: clamp(2rem, 7vw, 6rem); padding: 1rem 9vw 5rem; }
.detail-image-wrap { overflow: hidden; aspect-ratio: 1 / 1; border: 1px solid var(--line); background: #f8fafb; }
.detail-image { display: block; width: 100%; height: 100%; object-fit: contain; }
.detail-copy { padding-top: 1rem; }
.detail-copy h1 { margin: 0 0 1.25rem; font-size: clamp(2.65rem, 5vw, 4.6rem); line-height: 1.02; }
.detail-intro { margin-bottom: 2rem; color: var(--muted); line-height: 1.7; }
.data-panel { display: grid; gap: 0; margin: 0 0 1.5rem; border-top: 1px solid var(--line); }
.data-panel > div, .variant-select { display: flex; justify-content: space-between; align-items: center; gap: 1rem; min-height: 55px; border-bottom: 1px solid var(--line); font-size: .78rem; }
.data-panel > div span, .variant-select span { color: var(--muted); }
.data-panel strong { text-align: right; font-weight: 650; }
.variant-select select { max-width: 60%; padding: .5rem; border: 1px solid #bdc8bf; background: white; color: var(--ink); }
.fine-print { margin: .9rem 0 0; color: var(--muted); font-size: .76rem; line-height: 1.7; }
.technical-section { padding: 0 9vw 5rem; }
.technical-section .section-heading { border-bottom: 1px solid var(--line); padding-bottom: 1.25rem; }
.technical-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
.technical-grid article { padding: 1.35rem; background: white; }
.technical-grid h3 { font-family: var(--serif); font-size: 1.2rem; font-weight: 400; }
.technical-grid p { margin: 0; color: var(--muted); font-size: .8rem; line-height: 1.65; }
.technical-grid p + p { margin-top: .8rem; }
.technical-grid > article:nth-child(n+3) { grid-column: 1 / -1; }
.research-index { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.25rem 0; }
.research-index a { max-width: 100%; padding: .4rem .65rem; border: 1px solid var(--line); border-radius: 2px; font-size: .75rem; overflow-wrap: anywhere; text-decoration: none; }
.research-index a:hover, .research-index a:focus-visible { border-color: var(--ink); background: #f2f7fa; }
.research-topics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem 2rem; }
.research-topic { min-width: 0; padding-top: 1rem; border-top: 1px solid var(--line); scroll-margin-top: 7rem; }
.research-topic h4 { margin: 0 0 .65rem; font-family: var(--serif); font-size: 1.12rem; font-weight: 400; overflow-wrap: anywhere; }
.technical-grid .research-topic p { font-size: .88rem; line-height: 1.8; }
.technical-grid .topic-citations { display: flex; flex-wrap: wrap; gap: .35rem 1rem; margin-top: .8rem; font-size: .68rem; }
.topic-citations a { overflow-wrap: anywhere; }
.reference-metadata { display: block; margin-top: .25rem; color: var(--muted); font-size: .73rem; }
.citation-list li + li { margin-top: .9rem; }
@media (max-width: 700px) { .research-topics { grid-template-columns: 1fr; } }
.technical-grid .technical-data-label { margin-bottom: .55rem; color: #147a9c; }
.spec-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem 1rem; margin: 1rem 0; }
.spec-list div { min-width: 0; }
.spec-list dt { color: var(--muted); font-size: .72rem; }
.spec-list dd { margin: .2rem 0 0; overflow-wrap: anywhere; font-size: .85rem; }
.citation-list { margin: .8rem 0 0; padding-left: 1.2rem; font-size: .8rem; }
.citation-list a { overflow-wrap: anywhere; }
.references-list { margin-top: 2rem; }
.reference-group { padding: 1.25rem 0; border-top: 1px solid var(--line); }
.reference-group h2 { margin: 0 0 .75rem; font-family: var(--serif); font-size: 1.35rem; font-weight: 400; }
.molecule-figure { display: grid; justify-items: center; margin: 1rem 0; border: 1px solid var(--line); background: #fff; }
.molecule-figure img { display: block; width: min(100%, 300px); height: auto; }
.molecule-figure figcaption { width: 100%; padding: .75rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .68rem; line-height: 1.6; }
.approval-note { margin-top: 1rem; padding: 1rem; border-left: 3px solid #2585a2; background: #f2f7fa; }
.approval-note h4 { margin: 0 0 .45rem; font-size: .82rem; }
.approval-note p { margin: 0 0 .5rem; }
.approval-note a { color: #145f83; font-size: .72rem; text-decoration: underline; text-underline-offset: .15em; }
.legal-warning { display: flex; gap: 1rem; max-width: 860px; margin: 3rem 9vw 6rem; padding: 1.5rem; border: 1px solid #d2c29e; background: #fbf8ed; }
.legal-warning > span { font-size: 1.3rem; }
.legal-warning h2 { margin: 0 0 .5rem; font-size: 1.4rem; }
.legal-warning p { margin: 0; color: var(--muted); line-height: 1.7; }
.cart-section { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, 340px); align-items: start; gap: 2rem; padding: 3rem 7vw 6rem; }
.cart-items { display: grid; gap: .8rem; }
.cart-row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 1.5rem; padding: 1.25rem; background: white; }
.cart-row h2 { margin: 0 0 .35rem; font-family: var(--serif); font-size: 1.25rem; font-weight: 400; }
.cart-row p { margin: 0; color: var(--muted); font-size: .75rem; }
.cart-variant { margin-bottom: .35rem !important; }
.cart-controls { display: grid; justify-items: start; gap: .5rem; }
.cart-controls label { display: grid; gap: .35rem; color: var(--muted); font-size: .68rem; }
.cart-controls input { width: 5rem; min-height: 38px; padding: .4rem; border: 1px solid #bdc8bf; }
.cart-remove { padding: .25rem 0; border: 0; border-bottom: 1px solid #9caea4; background: transparent; color: var(--ink); cursor: pointer; font-size: .7rem; }
.cart-line-total { font-size: .85rem; white-space: nowrap; }
.cart-summary { position: sticky; top: 1rem; padding: 1.5rem; background: #e9ede2; }
.cart-summary > p:first-child { display: flex; justify-content: space-between; gap: 1rem; padding-bottom: .9rem; border-bottom: 1px solid #cbd4c8; }
.cart-summary .button { width: 100%; }
.cart-summary .fine-print { font-size: .7rem; }
.cart-summary .text-link { margin-top: 1rem; }
.cart-status { min-height: 1.2rem; margin: .5rem 0 0; color: #385b49; font-size: .78rem; }
.locale-page { max-width: 920px; min-height: calc(100vh - 32px); margin: 0 auto; padding: 8vh 7vw; }
.locale-page > .brand { margin-bottom: 7rem; }
.locale-page h1 { margin: 0 0 2rem; font-size: clamp(3rem, 7vw, 5.5rem); }
.locale-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .8rem; }
.locale-card { display: flex; align-items: center; gap: 1rem; padding: 1.3rem; border: 1px solid var(--line); background: white; }
.locale-card > span:first-child { color: #758742; font-size: .68rem; font-weight: 700; letter-spacing: .1em; }
.locale-card > strong { flex: 1; font-family: var(--serif); font-size: 1.2rem; font-weight: 400; }

.site-footer { display: grid; grid-template-columns: 1fr 2fr; gap: 2rem 6vw; padding: 3rem 7vw 2rem; background: #0b2b4b; color: #eef7fb; }
.footer-brand p { margin: .9rem 0 0; color: #a9c3d5; font-size: .77rem; }
.site-footer .brand { color: white; }
.site-footer nav { display: flex; flex-wrap: wrap; align-content: start; gap: .75rem 1.5rem; }
.site-footer nav a { color: #d2e4ef; font-size: .72rem; }
.footer-note { grid-column: 1 / -1; max-width: 900px; margin: 0; padding-top: 1.1rem; border-top: 1px solid #315572; color: #a9c3d5; font-size: .7rem; line-height: 1.65; }

@media (max-width: 1000px) {
  .site-header { flex-wrap: wrap; gap: .75rem 1.5rem; padding: 1rem 4vw; }
  .site-header nav { order: 3; width: 100%; min-width: 0; max-width: 100%; justify-content: space-between; gap: .6rem; }
  .hero { padding-inline: 6vw; }
  .hero-visual { min-height: 350px; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reference-guide-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-detail { padding-inline: 6vw; }
}
@media (max-width: 680px) {
  .preview-bar { font-size: .64rem; }
  .site-header { padding: .9rem 5vw; }
  .brand-logo { width: 128px; height: 52px; }
  .site-header nav { min-width: 0; overflow-x: auto; justify-content: flex-start; gap: 1.15rem; }
  .site-header nav a { flex: 0 0 auto; font-size: .7rem; }
  .language-picker { margin-left: auto; font-size: .7rem; }
  .language-picker span { display: none; }
  .hero { display: block; padding: 3.8rem 1.25rem 2.8rem; }
  .hero h1 { font-size: clamp(3rem, 13vw, 4.6rem); }
  .hero-lede { font-size: .95rem; }
  .hero-visual { position: absolute; top: 1rem; right: -7rem; z-index: 0; width: min(94vw, 390px); min-height: 0; opacity: .24; animation: none; pointer-events: none; }
  .molecule-scene { width: 100%; }
  .hero-caption { display: none; }
  .scene-coordinate { display: none; }
  .notice-band { padding: 1rem 6vw; }
  .research-disclaimer { grid-template-columns: 28px minmax(0, 1fr); gap: .7rem; margin: 1.2rem 1rem 0; padding: 1rem; }
  .disclaimer-mark { width: 26px; height: 26px; }
  .disclaimer-content p, .disclaimer-content li { font-size: .78rem; }
  .section-block { padding: 3.5rem 6vw; }
  .section-heading { align-items: start; flex-direction: column; }
  .product-grid { gap: .7rem; }
  .product-card-copy { padding: .9rem .75rem 1rem; }
  .product-card h3 { min-height: 0; font-size: 1.1rem; }
  .product-card .eyebrow { min-height: 0; }
  .product-meta, .availability-meta { font-size: .66rem; }
  .documentation-panel { align-items: start; flex-direction: column; padding: 3rem 7vw; }
  .page-hero { padding: 3.5rem 7vw 2.5rem; }
  .page-hero h1 { font-size: clamp(2.8rem, 12vw, 4rem); }
  .about-hero { min-height: 390px; padding: 3.5rem 7vw; }
  .about-hero h1 { max-width: 85%; font-size: clamp(2.8rem, 11vw, 4rem); }
  .about-hero-mark { top: auto; right: -2.2rem; bottom: -4rem; width: 190px; transform: rotate(-12deg); opacity: .58; }
  .about-intro { padding: 3.5rem 7vw; }
  .about-principles-section { padding: 3.5rem 6vw; }
  .about-section-heading { align-items: start; flex-direction: column; }
  .about-principles { grid-template-columns: 1fr; gap: .7rem; }
  .about-principle { padding: 1.2rem; }
  .about-principle-number { margin-bottom: 1.1rem; }
  .about-cta { align-items: start; flex-direction: column; padding: 3.5rem 7vw; }
  .references-hero { padding: 3.5rem 7vw; }
  .references-index { padding-inline: 5vw; }
  .references-guide { padding: 3.5rem 6vw; }
  .reference-guide-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .references-collections { padding: 3.5rem 6vw 1rem; }
  .reference-group-heading { align-items: start; flex-wrap: wrap; }
  .reference-group-heading h2 { flex-basis: 70%; }
  .reference-group-heading > a { margin-left: auto; }
  .citation-card { grid-template-columns: 2rem minmax(0, 1fr); gap: .65rem; padding: .85rem; }
  .citation-open { grid-column: 2; }
  .references-limits { margin: 1rem 6vw 3rem; padding: 1.2rem; }
  .catalog-tools { padding-inline: 6vw; }
  .filter-list { flex-wrap: nowrap; overflow-x: auto; padding-bottom: .4rem; }
  .filter-chip { flex: 0 0 auto; }
  .catalog-section { padding-top: 1.5rem; }
  .product-detail { grid-template-columns: 1fr; gap: 1rem; padding: .5rem 6vw 3rem; }
  .detail-copy { padding-top: 1rem; }
  .detail-copy h1 { font-size: 3rem; }
  .technical-section { padding: 0 6vw 3rem; }
  .technical-grid { grid-template-columns: 1fr; }
  .legal-warning { margin: 2rem 6vw 4rem; }
  .locale-page { padding: 6vh 6vw; }
  .locale-page > .brand { margin-bottom: 5rem; }
  .site-footer { grid-template-columns: 1fr; padding-inline: 6vw; }
  .footer-note { grid-column: auto; }
  .cart-section { grid-template-columns: 1fr; padding: 2rem 6vw 4rem; }
  .cart-summary { position: static; }
  .cart-row { grid-template-columns: minmax(0, 1fr) auto; gap: .9rem; }
  .cart-line-total { grid-column: 1 / -1; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}
/* Header: cart stays between the brand and language control at every width. */
.site-header { position: relative; display: grid; grid-template-columns: auto minmax(0,1fr) 44px auto; grid-template-areas: "brand nav cart languages"; gap: clamp(.5rem,1.4vw,1.5rem); z-index: 100; }
.site-header > .brand { grid-area: brand; }
.site-header > nav { grid-area: nav; flex-wrap: wrap; justify-content: center; gap: .65rem 1.2rem; overflow: visible; width: auto; }
.site-header > nav a { white-space: normal; }
.site-header > .cart-link { grid-area: cart; position: relative; display: grid; place-items: center; width: 44px; height: 44px; color: var(--ink); }
.cart-link svg { width: 26px; height: 26px; }
.cart-link span { position: absolute; right: -1px; top: 0; min-width: 17px; height: 17px; font-size: 10px; }
.site-header > .language-picker { grid-area: languages; white-space: nowrap; position: relative; }
.language-options { display: flex; align-items: center; gap: .5rem; }
.menu-toggle, .language-toggle { display: none; }
.menu-toggle .close-icon { display: none; }
@media (max-width: 1000px) {
  .site-header { position: sticky; top: 0; min-height: 96px; padding: 6px 4vw; gap: 6px; grid-template-columns: minmax(0,1fr) 44px 48px 44px; grid-template-areas: "brand cart languages toggle"; box-shadow: 0 3px 18px #122e5006; }
  .site-header > .brand { min-width: 0; width: min(100%,210px); overflow: hidden; }
  .site-header .brand-logo { width: 100%; height: 84px; object-fit: cover; object-position: center; }
  .site-header > .cart-link { justify-self: center; border-radius: 10px; }
  .site-header > .language-picker { margin: 0; display: block; }
  .language-picker > span { display: none; }
  .language-toggle { display: flex; align-items: center; justify-content: center; gap: 3px; width: 48px; min-height: 44px; padding: 0; border: 0; background: transparent; color: var(--ink); font-size: 13px; font-weight: 650; cursor: pointer; border-radius: 10px; }
  .language-toggle svg { width: 13px; height: 13px; }
  .language-options { display: none; position: absolute; top: calc(100% + 10px); right: 0; min-width: 88px; padding: 6px; background: white; border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 12px 30px #122e5020; }
  .language-picker.is-open .language-options { display: grid; }
  .language-options a { display: grid; place-items: center; min-height: 44px; padding: 8px 16px; font-size: 13px; border: 0; border-radius: 7px; }
  .language-options a[aria-current="page"] { color: #126b85; background: #eaf5f8; }
  .menu-toggle { grid-area: toggle; display: grid; place-items: center; width: 44px; height: 44px; padding: 10px; border: 1px solid var(--line); border-radius: 10px; background: #f5f8fb; color: var(--ink); cursor: pointer; }
  .menu-toggle svg { width: 23px; height: 23px; }
  .site-header.menu-open .menu-toggle { background: var(--ink); color: white; border-color: var(--ink); }
  .site-header.menu-open .menu-icon { display: none; }
  .site-header.menu-open .close-icon { display: block; }
  .site-header > nav { grid-area: auto; position: absolute; top: 100%; left: 0; right: 0; width: 100%; max-width: 100%; display: none; max-height: calc(100dvh - 96px); overflow-y: auto; overflow-x: hidden; padding: 8px max(4vw,16px) 18px; background: white; border-bottom: 1px solid var(--line); box-shadow: 0 16px 24px #122e5014; }
  .site-header.menu-open > nav { display: grid; grid-template-columns: minmax(0,1fr); gap: 0; }
  .site-header > nav a { display: flex; align-items: center; justify-content: space-between; min-width: 0; min-height: 54px; padding: 14px 4px; border-top: 0; border-bottom: 1px solid var(--line); font-size: 17px; font-weight: 550; line-height: 1.4; overflow-wrap: anywhere; }
  .site-header > nav a::after { content: "↗"; margin-left: 16px; flex: none; font-size: 17px; color: #2698b0; }
  .site-header > nav a:last-child { border-bottom: 0; }
  .site-header > nav a:hover, .language-options a:hover { background: #f4f8fa; }
}
.site-footer{position:relative;isolation:isolate;background:radial-gradient(ellipse at 0 0,#154465 0,transparent 58%),#09243d;grid-template-columns:minmax(220px,.9fr) minmax(0,1.6fr);gap:42px 8vw;padding:56px 7vw 28px}.site-footer .brand-logo{width:280px;max-width:100%;height:120px;object-fit:cover;object-position:center;filter:grayscale(1) invert(1);mix-blend-mode:screen}.footer-brand{min-width:0}.footer-brand>p{max-width:290px;font-size:14px;line-height:1.7;color:#bad0de;margin:8px 0 20px}.footer-email{display:inline-flex;align-items:center;gap:14px;font-size:14px;color:#eef7fb;border-bottom:1px solid #4d748e;padding-bottom:7px}.site-footer>nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;align-content:start;padding-top:20px}.footer-link-group{display:flex;flex-direction:column;gap:12px;min-width:0}.footer-link-group h2{margin:0 0 8px;font-size:12px;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:#76c7d9}.site-footer .footer-link-group a{font-size:13px;line-height:1.55;color:#d2e4ef;overflow-wrap:anywhere}.site-footer a:hover{color:white}.footer-note{max-width:none;font-size:11px;line-height:1.8;border-color:#2a4e67;padding-top:22px;color:#a6bfce}@media(max-width:760px){.site-footer{grid-template-columns:1fr;gap:30px;padding:36px 6vw 25px}.site-footer .brand-logo{width:250px;height:108px}.site-footer>nav{grid-template-columns:repeat(2,minmax(0,1fr));padding-top:0;gap:30px 22px}.footer-link-group:last-child{grid-column:1/-1}.footer-note{grid-column:1/-1}.footer-brand>p{margin-top:0}}