:root {
  color-scheme: light;
  --navy: #112b43;
  --blue: #1955c5;
  --muted: #526475;
  --line: #d9e3ed;
  --pale: #f2f6fa;
}

* { box-sizing: border-box; }
body { margin: 0; background: #fff; color: var(--navy); font: 1rem/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: inherit; text-underline-offset: .25em; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
p, h1, h2, h3 { margin-top: 0; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
h1 { margin-bottom: 1.5rem; font-size: clamp(2.4rem, 4.5vw, 4.1rem); font-weight: 600; line-height: 1.1; letter-spacing: -.045em; }
h2 { margin-bottom: 1.5rem; font-size: clamp(1.8rem, 3.2vw, 2.8rem); font-weight: 550; line-height: 1.16; letter-spacing: -.035em; }
h3 { margin-bottom: .8rem; font-size: 1.5rem; font-weight: 600; line-height: 1.3; letter-spacing: -.025em; }
.wrap { width: min(1180px, calc(100% - 4rem)); margin-inline: auto; }
.site-header, .site-footer, nav { display: flex; align-items: center; flex-wrap: wrap; gap: 1.5rem; }
.site-header { justify-content: space-between; min-height: 104px; padding-block: 1.4rem; border-bottom: 1px solid var(--line); }
.wordmark { font-size: 1.55rem; font-weight: 800; letter-spacing: -.06em; line-height: 1; text-decoration: none; }
.wordmark span { color: var(--blue); }
.main-nav { gap: 2rem; }
.main-nav a { color: var(--muted); font-size: .88rem; font-weight: 500; text-decoration: none; padding-block: .5rem; }
.main-nav a:hover { color: var(--blue); text-decoration: underline; }
.languages { padding: 4px; gap: 2px; border: 1px solid var(--line); border-radius: 6px; }
.languages a { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 36px; padding: .2rem .65rem; border-radius: 3px; font-size: .72rem; font-weight: 650; text-decoration: none; }
.languages a[aria-current="page"] { color: #fff; background: var(--navy); }
.languages a:not([aria-current]):hover { background: var(--pale); }
.hero { display: grid; grid-template-columns: 1.18fr 1fr; gap: 4rem; align-items: center; padding-block: 5.5rem; }
.hero-copy { min-width: 0; }
.eyebrow { display: flex; align-items: center; gap: .8rem; margin-bottom: 1.6rem; color: var(--blue); font-size: .69rem; font-weight: 650; letter-spacing: .13em; line-height: 1.6; }
.small-line { height: 2px; width: 26px; background: var(--blue); }
.lead { max-width: 34rem; margin-bottom: 1.9rem; color: var(--muted); font-size: 1.03rem; line-height: 1.8; }
.button { display: inline-flex; gap: 1.8rem; align-items: center; justify-content: space-between; padding: .95rem 1.35rem; border-radius: 5px; background: var(--blue); color: #fff; font-size: .88rem; font-weight: 600; text-decoration: none; }
.button:hover { background: #12459f; }
.button span { font-size: 1.3rem; line-height: 1; }
.hero-note { margin: 1.15rem 0 0; color: var(--muted); font-size: .75rem; }

/* Decorative molecule: no imagery of facilities or operational claims. */
.hydrogen-panel { position: relative; display: flex; flex-direction: column; justify-content: space-between; min-width: 0; aspect-ratio: 1 / 1.08; padding: 1.65rem; overflow: hidden; border: 1px solid #28445f; border-radius: 10px; color: #dce9f5; background-color: var(--navy); background-image: linear-gradient(#ffffff06 1px, transparent 1px), linear-gradient(90deg, #ffffff06 1px, transparent 1px), radial-gradient(ellipse at 65% 38%, #234b70, #10263c 75%); background-size: 36px 36px, 36px 36px, 100% 100%; }
.panel-top { display: flex; align-items: center; justify-content: space-between; font: .62rem/1.5 ui-monospace, monospace; letter-spacing: .12em; }
.cross { color: #779bbf; font-size: 1.5rem; }
.molecule { position: absolute; inset: 10% 0 24%; }
.orbit { position: absolute; top: 8%; left: 9%; width: 82%; height: 88%; border: 1px solid #87b7e529; border-radius: 50%; transform: rotate(-35deg); }
.orbit-two { top: 16%; left: 6%; width: 88%; height: 66%; transform: rotate(35deg); }
.bond { position: absolute; top: 48%; left: 30%; width: 43%; height: 16%; transform: rotate(-30deg); border: 1px solid #91bbe96b; border-radius: 40%; background: linear-gradient(#719cc242, #49749a99, #183d5f); }
.atom { position: absolute; display: grid; place-items: center; width: 35%; aspect-ratio: 1; border: 1px solid #8caaca; border-radius: 50%; font-size: clamp(2.4rem, 4vw, 3.5rem); font-weight: 300; box-shadow: 0 18px 40px #040f224d, inset -10px -12px 30px #0a244950; }
.atom-one { left: 15%; top: 40%; background: radial-gradient(circle at 30% 25%, #e5f1ff, #7195bb 48%, #264b70 86%); color: #18344f; }
.atom-two { left: 52%; top: 18%; background: radial-gradient(circle at 30% 25%, #a7cbf7, #477ab8 48%, #193956 86%); color: #edf5ff; }
.panel-bottom { display: flex; gap: 1rem; align-items: center; margin-top: auto; padding-top: 1.2rem; border-top: 1px solid #7696b24d; }
.formula { font-size: 3rem; font-weight: 300; letter-spacing: -.04em; line-height: 1; }
.formula > span { font-size: 1.5rem; }
.panel-bottom strong { display: block; font-size: .93rem; font-weight: 500; }
.panel-bottom div > span { display: block; color: #b4c8db; font-size: .64rem; }

.status-strip { border-block: 1px solid var(--line); background: var(--pale); }
.status-content { display: flex; align-items: center; gap: 1.8rem; padding-block: 1.15rem; }
.status-label { flex-shrink: 0; font-size: .73rem; font-weight: 650; }
.status-content p { margin: 0; padding-left: 1.8rem; border-left: 1px solid #b9cbdc; color: var(--muted); font-size: .8rem; }
.section { padding-block: 5rem; scroll-margin-top: 2rem; }
.section-heading { display: grid; grid-template-columns: 1fr 1.4fr; align-items: start; gap: 2rem; margin-bottom: 2rem; }
.section-heading .eyebrow { padding-top: .6rem; }
.section-heading h2 { margin-bottom: .8rem; }
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
.card { display: flex; flex-direction: column; min-width: 0; padding: 2.25rem; border: 1px solid var(--line); border-radius: 8px; background: var(--pale); }
.card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 2.6rem; }
.card-symbol { display: grid; place-items: center; width: 48px; height: 48px; background: #e4edf9; border: 1px solid #cddcf0; border-radius: 8px; color: var(--blue); font-size: 1.4rem; font-weight: 550; }
.card-number { color: #697c8e; font: .75rem ui-monospace, monospace; }
.card p { max-width: 29rem; margin-bottom: 2rem; color: var(--muted); font-size: .95rem; }
.card-footer { margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .73rem; }
.partners { padding-block: 4.5rem; background: var(--navy); color: #fff; scroll-margin-top: 0; }
.partners-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6rem; }
.partners .eyebrow { color: #a9c8ed; }
.partners h2 { max-width: 26rem; }
.partners-copy { max-width: 25rem; color: #bfcede; font-size: .95rem; }
.text-link { display: inline-flex; align-items: center; gap: 1.5rem; padding-block: .5rem; font-size: .9rem; }
.text-link:hover { color: #c4ddff; }
.partners a:focus-visible { outline-color: #a9c8ed; }
.partner-list { list-style: none; margin: 0; padding: 0; }
.partner-list li { display: flex; align-items: baseline; gap: 1.6rem; padding-block: 1.45rem; border-bottom: 1px solid #ffffff26; }
.partner-list li:first-child { padding-top: 0; }
.partner-list h3 { margin-bottom: .4rem; font-size: 1.08rem; font-weight: 500; letter-spacing: -.015em; }
.partner-list p { margin: 0; color: #bfcede; font-size: .85rem; }
.list-number { color: #a9c8ed; font: .7rem ui-monospace, monospace; }
.contact { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 2rem; padding-block: 5.5rem; }
.contact > div { min-width: 0; }
.contact h2 { font-size: clamp(1.8rem, 2.6vw, 2.2rem); margin-bottom: .8rem; }
.contact p:not(.eyebrow) { margin-bottom: 0; color: var(--muted); font-size: .88rem; }
.email-link { padding-block: .7rem; border-bottom: 1px solid var(--blue); color: var(--blue); font-size: clamp(1.25rem, 2.3vw, 1.8rem); letter-spacing: -.03em; text-decoration: none; overflow-wrap: anywhere; }
.email-link span { margin-left: .7rem; }
.email-link:hover { color: var(--navy); border-color: var(--navy); }
.site-footer { justify-content: space-between; padding-block: 2rem; border-top: 1px solid var(--line); }
.site-footer .wordmark { font-size: 1.2rem; }
.site-footer p { margin: .7rem 0 0; color: var(--muted); font-size: .73rem; }
.footer-languages { gap: 1.3rem; font-size: .78rem; color: var(--muted); }
.footer-languages a { padding-block: .5rem; }
.footer-languages [aria-current="page"] { color: var(--navy); font-weight: 600; }
.skip-link { position: absolute; top: -6rem; left: 1rem; z-index: 10; padding: .75rem 1rem; background: #fff; color: var(--navy); border: 1px solid var(--blue); }
.skip-link:focus { top: 1rem; }

@media (max-width: 1000px) {
  .hero { gap: 2rem; padding-block: 3.5rem; }
  .partners-grid { gap: 3rem; }
  .hydrogen-panel { padding: 1.1rem; }
}

@media (max-width: 760px) {
  .wrap { width: calc(100% - 2.5rem); }
  .site-header { min-height: auto; gap: 1rem; }
  .main-nav { order: 3; width: 100%; gap: 1.5rem; border-top: 1px solid var(--line); padding-top: .65rem; }
  .main-nav a { font-size: .8rem; }
  .hero, .cards, .section-heading, .partners-grid { grid-template-columns: 1fr; }
  .hero { gap: 2.5rem; padding-block: 2.75rem; }
  h1 { max-width: 34rem; }
  .lead { font-size: .98rem; }
  .hydrogen-panel { aspect-ratio: 1.12; max-width: 480px; width: 100%; justify-self: center; padding: 1.5rem; }
  .atom { font-size: 2.5rem; }
  .status-content { align-items: flex-start; flex-direction: column; gap: .35rem; }
  .status-content p { padding-left: 0; border-left: 0; }
  .section { padding-block: 3.5rem; }
  .section-heading { gap: .3rem; margin-bottom: 1.5rem; }
  .section-heading .eyebrow { padding-top: 0; margin-bottom: 1rem; }
  .card { padding: 1.5rem; }
  .card-top { margin-bottom: 1.8rem; }
  .partners { padding-block: 3.5rem; }
  .partners-grid { gap: 2rem; }
  .contact { gap: 1.5rem; }
}