:root {
  --navy-950: #071522;
  --navy-900: #0b2239;
  --navy-800: #123650;
  --slate-700: #41556a;
  --slate-600: #5f7285;
  --slate-300: #c5d0d9;
  --slate-200: #dfe7ed;
  --slate-100: #edf3f6;
  --white: #ffffff;
  --teal-700: #0f7c89;
  --teal-600: #1595a1;
  --teal-500: #1da7b4;
  --cyan-400: #2cd2e2;
  --coral-400: #ff8b72;
  --amber-300: #ffc96b;
  --surface: #ffffff;
  --surface-soft: #f4f8fa;
  --text: #0b2239;
  --muted: #5f7285;
  --border: rgba(11, 34, 57, .12);
  --shadow: 0 24px 70px rgba(7, 21, 34, .12);
  --radius-sm: 14px;
  --radius-md: 22px;
  --radius-lg: 34px;
  --container: 1180px;
  --header-h: 82px;
}

html[data-theme="dark"] {
  --surface: #0b1826;
  --surface-soft: #0e2030;
  --text: #edf8fa;
  --muted: #a9bcc8;
  --border: rgba(223, 231, 237, .12);
  --shadow: 0 28px 80px rgba(0, 0, 0, .34);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--surface);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input, textarea { font: inherit; }
::selection { color: var(--navy-950); background: var(--cyan-400); }

.skip-link {
  position: fixed;
  left: 16px;
  top: -70px;
  z-index: 1000;
  padding: 10px 14px;
  color: var(--white);
  background: var(--navy-900);
  border-radius: 8px;
  transition: top .2s ease;
}
.skip-link:focus { top: 16px; }

.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.section { padding: 112px 0; }
.section-shell { overflow: clip; }
.section-tint { background: var(--surface-soft); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--surface) 84%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.scrolled { border-color: var(--border); box-shadow: 0 8px 28px rgba(7,21,34,.06); }
.nav-wrap { height: 100%; display: flex; align-items: center; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; flex-shrink: 0; }
.brand img { width: 67px; height: auto; }
.brand span { display: grid; line-height: 1.15; }
.brand strong { font-size: .95rem; letter-spacing: -.01em; }
.brand small { margin-top: 4px; color: var(--muted); font-size: .69rem; letter-spacing: .08em; text-transform: uppercase; }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 25px; }
.site-nav a { position: relative; color: var(--muted); font-size: .9rem; font-weight: 650; text-decoration: none; }
.site-nav a::after { content: ""; position: absolute; inset: auto 0 -8px; width: 0; height: 2px; background: var(--teal-500); transition: width .2s ease; }
.site-nav a:hover, .site-nav a.active { color: var(--text); }
.site-nav a:hover::after, .site-nav a.active::after { width: 100%; }
.theme-toggle, .nav-toggle { border: 1px solid var(--border); color: var(--text); background: var(--surface); }
.theme-toggle { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; cursor: pointer; }
.theme-toggle svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }
.theme-toggle .moon { display: none; }
html[data-theme="dark"] .theme-toggle .sun { display: none; }
html[data-theme="dark"] .theme-toggle .moon { display: block; }
.nav-toggle { display: none; width: 42px; height: 42px; padding: 10px; border-radius: 50%; cursor: pointer; }
.nav-toggle span { display: block; height: 2px; margin: 4px 0; border-radius: 2px; background: currentColor; transition: transform .2s ease, opacity .2s ease; }

.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  padding: 92px 0 42px;
  background:
    radial-gradient(circle at 84% 8%, rgba(44,210,226,.18), transparent 26%),
    radial-gradient(circle at 6% 84%, rgba(255,139,114,.12), transparent 22%),
    linear-gradient(135deg, var(--surface) 0%, color-mix(in srgb, var(--surface-soft) 74%, var(--surface)) 100%);
}
.hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .35; background-image: radial-gradient(var(--teal-600) .7px, transparent .7px); background-size: 24px 24px; mask-image: linear-gradient(to right, #000, transparent 72%); }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 70px; }
.hero-copy { max-width: 670px; }
.eyebrow, .section-label { margin: 0 0 18px; color: var(--teal-600); font-size: .78rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow span { width: 34px; height: 2px; background: linear-gradient(90deg, var(--teal-600), var(--cyan-400)); }
.hero h1 { margin: 0; max-width: 780px; font-size: clamp(3.1rem, 6vw, 6.35rem); line-height: .98; letter-spacing: -.065em; }
.hero h1 em { display: block; font-style: normal; color: transparent; background: linear-gradient(110deg, var(--teal-600), var(--cyan-400) 55%, var(--coral-400)); background-clip: text; -webkit-background-clip: text; }
.hero-lead { max-width: 650px; margin: 28px 0 0; color: var(--muted); font-size: clamp(1.02rem, 1.5vw, 1.19rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 34px; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 0 20px; border: 1px solid transparent; border-radius: 999px; font-size: .9rem; font-weight: 760; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--white); background: linear-gradient(135deg, var(--teal-700), var(--teal-500)); box-shadow: 0 14px 34px rgba(21,149,161,.28); }
.button-primary:hover { box-shadow: 0 18px 40px rgba(21,149,161,.38); }
.button-secondary { color: var(--text); border-color: var(--border); background: var(--surface); }
.button-secondary:hover { border-color: var(--teal-500); }
.hero-points { display: flex; flex-wrap: wrap; gap: 11px 22px; padding: 0; margin: 30px 0 0; list-style: none; color: var(--muted); font-size: .85rem; }
.hero-points li { display: flex; align-items: center; gap: 8px; }
.hero-points li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--teal-500); box-shadow: 0 0 0 4px rgba(29,167,180,.12); }

.hero-visual { position: relative; min-height: 600px; display: grid; place-items: center; }
.portrait-card { position: relative; z-index: 2; width: min(88%, 420px); aspect-ratio: .73; overflow: hidden; border: 1px solid rgba(255,255,255,.35); border-radius: 38px 38px 130px 38px; box-shadow: var(--shadow); background: var(--navy-900); }
.portrait-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(7,21,34,.45), transparent 42%); pointer-events: none; }
.portrait-card picture, .portrait-card img { width: 100%; height: 100%; }
.portrait-card img { object-fit: cover; object-position: 51% 37%; }
.portrait-caption { position: absolute; z-index: 3; left: 22px; bottom: 20px; display: inline-flex; align-items: center; gap: 9px; padding: 9px 12px; color: var(--white); border: 1px solid rgba(255,255,255,.22); border-radius: 999px; background: rgba(7,21,34,.52); backdrop-filter: blur(12px); font-size: .78rem; font-weight: 700; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #73e2b1; box-shadow: 0 0 0 4px rgba(115,226,177,.15); }
.orbit { position: absolute; border: 1px solid rgba(29,167,180,.25); border-radius: 50%; }
.orbit-one { width: 540px; height: 540px; transform: rotate(-18deg); }
.orbit-two { width: 430px; height: 610px; transform: rotate(26deg); border-style: dashed; }
.orbit-one::before, .orbit-two::before { content: ""; position: absolute; width: 11px; height: 11px; border-radius: 50%; background: var(--cyan-400); box-shadow: 0 0 26px var(--cyan-400); }
.orbit-one::before { left: 16%; top: 8%; }
.orbit-two::before { right: 5%; top: 52%; background: var(--coral-400); box-shadow: 0 0 24px var(--coral-400); }
.floating-note { position: absolute; z-index: 3; min-width: 122px; padding: 13px 15px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: color-mix(in srgb, var(--surface) 86%, transparent); box-shadow: 0 16px 40px rgba(7,21,34,.12); backdrop-filter: blur(12px); }
.floating-note strong, .floating-note span { display: block; }
.floating-note strong { font-size: .9rem; }
.floating-note span { margin-top: 2px; color: var(--muted); font-size: .73rem; }
.note-one { top: 12%; left: -4%; }
.note-two { right: -3%; bottom: 16%; }
.hero-strip { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 62px; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--border); }
.hero-strip div { min-height: 100px; padding: 22px 25px; background: color-mix(in srgb, var(--surface) 88%, transparent); }
.hero-strip strong, .hero-strip span { display: block; }
.hero-strip strong { font-size: .95rem; }
.hero-strip span { margin-top: 4px; color: var(--muted); font-size: .82rem; }

.section-heading { max-width: 760px; margin-bottom: 54px; }
.section-heading h2, .research-intro h2, .climate-copy h2, .forward-copy h2, .contact-card h2 { margin: 0; font-size: clamp(2.2rem, 4.2vw, 4.4rem); line-height: 1.05; letter-spacing: -.055em; }
.section-heading > p:last-child { max-width: 650px; margin: 20px 0 0; color: var(--muted); }
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 70px; align-items: start; }
.about-copy { font-size: 1.01rem; color: var(--muted); }
.about-copy p { margin: 0 0 20px; }
.large-copy { color: var(--text); font-size: clamp(1.35rem, 2.4vw, 2rem); line-height: 1.35; letter-spacing: -.02em; }
.about-card { position: relative; padding: 34px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: linear-gradient(145deg, var(--surface-soft), var(--surface)); box-shadow: var(--shadow); }
.about-card::before { content: ""; position: absolute; width: 94px; height: 94px; right: 20px; top: 18px; border-radius: 50%; background: radial-gradient(circle, rgba(44,210,226,.2), transparent 66%); }
.card-kicker { margin: 0 0 14px; color: var(--teal-600); font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.about-card h3 { margin: 0; max-width: 440px; font-size: clamp(1.35rem, 2vw, 1.85rem); line-height: 1.25; letter-spacing: -.025em; }
.about-card > p:not(.card-kicker) { color: var(--muted); }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.tag-row span, .research-topics span { padding: 7px 11px; color: var(--teal-700); border: 1px solid rgba(21,149,161,.2); border-radius: 999px; background: rgba(29,167,180,.08); font-size: .75rem; font-weight: 750; }

.expertise-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.expertise-card { min-height: 350px; display: flex; flex-direction: column; padding: 28px; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.expertise-card:hover { transform: translateY(-6px); border-color: rgba(29,167,180,.35); box-shadow: var(--shadow); }
.icon-box { width: 49px; height: 49px; display: grid; place-items: center; color: var(--teal-600); border-radius: 15px; background: rgba(29,167,180,.09); }
.icon-box svg { width: 25px; height: 25px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.7; }
.expertise-card .number { margin: auto 0 9px; color: var(--teal-600); font-size: .72rem; font-weight: 850; letter-spacing: .12em; }
.expertise-card h3 { margin: 0; font-size: 1.25rem; letter-spacing: -.02em; }
.expertise-card > p:last-child { margin: 13px 0 0; color: var(--muted); font-size: .9rem; }

.research-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 80px; align-items: start; }
.research-intro { position: sticky; top: calc(var(--header-h) + 34px); }
.research-intro > p:not(.section-label) { color: var(--muted); }
.research-callout { margin-top: 32px; padding: 24px; border-left: 3px solid var(--teal-500); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; background: var(--surface-soft); }
.research-callout span { color: var(--teal-600); font-size: .72rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.research-callout p { margin: 7px 0 0; color: var(--text); font-weight: 650; }
.research-flow { display: grid; gap: 13px; }
.research-flow article { display: grid; grid-template-columns: 62px 1fr; gap: 18px; padding: 23px; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); }
.research-flow article > span { width: 48px; height: 48px; display: grid; place-items: center; color: var(--white); border-radius: 15px; background: linear-gradient(135deg, var(--navy-900), var(--teal-600)); font-size: .78rem; font-weight: 850; }
.research-flow h3 { margin: 0; font-size: 1.05rem; }
.research-flow p { margin: 4px 0 0; color: var(--muted); font-size: .88rem; }
.research-topics { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 58px; }

.climate-section { color: var(--white); background:
  linear-gradient(125deg, rgba(44,210,226,.08), transparent 38%),
  radial-gradient(circle at 85% 40%, rgba(255,139,114,.16), transparent 22%),
  var(--navy-900);
}
.section-label.light { color: var(--cyan-400); }
.climate-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 80px; align-items: start; }
.climate-copy > p:not(.section-label) { max-width: 650px; color: #bbcad4; }
.climate-focus { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 38px; }
.climate-focus div { min-height: 130px; padding: 20px; border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius-sm); background: rgba(255,255,255,.045); }
.climate-focus strong, .climate-focus span { display: block; }
.climate-focus strong { color: var(--cyan-400); font-size: .95rem; }
.climate-focus span { margin-top: 8px; color: #aebfcb; font-size: .82rem; }
.climate-timeline { display: grid; gap: 18px; }
.climate-timeline article { position: relative; padding: 30px 30px 30px 34px; border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius-md); background: rgba(255,255,255,.055); backdrop-filter: blur(12px); }
.climate-timeline article::before { content: ""; position: absolute; left: -1px; top: 28px; width: 4px; height: 48px; border-radius: 0 5px 5px 0; background: linear-gradient(var(--cyan-400), var(--coral-400)); }
.climate-timeline span { color: var(--cyan-400); font-size: .72rem; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.climate-timeline h3 { margin: 7px 0 0; font-size: 1.22rem; }
.climate-timeline p { margin: 9px 0 0; color: #afbfca; font-size: .89rem; }

.work-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.work-card { min-height: 270px; padding: 31px; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); transition: transform .25s ease, box-shadow .25s ease; }
.work-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.work-type { margin: 0 0 30px; color: var(--teal-600); font-size: .74rem; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.work-card h3 { margin: 0; max-width: 500px; font-size: clamp(1.25rem, 2.1vw, 1.7rem); line-height: 1.25; letter-spacing: -.025em; }
.work-card > p:last-child { max-width: 570px; margin: 18px 0 0; color: var(--muted); }

.forward-card { display: grid; grid-template-columns: .68fr 1.32fr; gap: 65px; align-items: center; padding: 48px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow); }
.forward-logo-wrap { min-height: 340px; display: grid; place-items: center; overflow: hidden; border-radius: 26px; background: linear-gradient(145deg, rgba(44,210,226,.12), rgba(255,139,114,.1)); }
.forward-logo-wrap img { width: min(77%, 330px); height: auto; }
.forward-copy > p:not(.section-label):not(.forward-note) { color: var(--muted); font-size: 1.03rem; }
.forward-note { padding-left: 16px; border-left: 2px solid var(--coral-400); color: var(--text); font-weight: 640; }
.forward-copy .button { margin-top: 15px; }

.contact-section { padding-bottom: 92px; }
.contact-card { position: relative; overflow: hidden; display: grid; grid-template-columns: 1.25fr .75fr; gap: 48px; align-items: center; padding: 55px; color: var(--white); border-radius: var(--radius-lg); background: linear-gradient(135deg, var(--navy-950), var(--navy-800)); box-shadow: var(--shadow); }
.contact-card::after { content: ""; position: absolute; width: 330px; height: 330px; right: -90px; bottom: -180px; border: 1px solid rgba(44,210,226,.25); border-radius: 50%; box-shadow: 0 0 0 55px rgba(44,210,226,.05), 0 0 0 110px rgba(44,210,226,.025); }
.contact-card > * { position: relative; z-index: 1; }
.contact-card.single-column { grid-template-columns: minmax(0, 820px); }
.contact-card p:not(.section-label) { max-width: 720px; color: #bac9d3; }
.contact-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }
.button-light { color: var(--navy-900); background: var(--white); }
.button-outline-light { color: var(--white); border-color: rgba(255,255,255,.25); background: rgba(255,255,255,.04); }
.button-outline-light:hover { border-color: var(--cyan-400); }

.site-footer { padding: 40px 0; border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 15px; }
.footer-brand img { width: 58px; height: auto; }
.footer-brand p { max-width: 420px; margin: 0; color: var(--muted); font-size: .82rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-links a { color: var(--muted); font-size: .82rem; font-weight: 650; text-decoration: none; }
.footer-links a:hover { color: var(--teal-600); }
.copyright { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: .75rem; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); transition-delay: var(--delay, 0ms); }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1040px) {
  .site-nav { position: fixed; inset: var(--header-h) 20px auto; display: grid; gap: 0; padding: 10px; border: 1px solid var(--border); border-radius: 18px; background: var(--surface); box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(-10px); transition: all .2s ease; }
  .site-nav.open { opacity: 1; visibility: visible; transform: none; }
  .site-nav a { padding: 12px 14px; }
  .site-nav a::after { display: none; }
  .nav-toggle { display: block; margin-left: auto; }
  .theme-toggle { margin-left: 0; }
  .hero-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .hero-visual { min-height: 540px; }
  .expertise-grid { grid-template-columns: repeat(2, 1fr); }
  .research-layout, .climate-grid { gap: 52px; }
}

@media (max-width: 820px) {
  :root { --header-h: 72px; }
  .container { width: min(calc(100% - 30px), var(--container)); }
  .section { padding: 84px 0; }
  .brand small { display: none; }
  .hero { padding-top: 62px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: none; }
  .hero h1 { max-width: 760px; }
  .hero-visual { min-height: 590px; }
  .portrait-card { width: min(75%, 420px); }
  .note-one { left: 5%; }
  .note-two { right: 4%; }
  .hero-strip { grid-template-columns: 1fr; }
  .about-grid, .research-layout, .climate-grid, .forward-card, .contact-card { grid-template-columns: 1fr; }
  .about-grid { gap: 38px; }
  .research-intro { position: static; }
  .climate-grid { gap: 55px; }
  .forward-card { gap: 35px; padding: 32px; }
  .forward-logo-wrap { min-height: 280px; }
  .contact-actions { justify-content: flex-start; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .brand strong { font-size: .86rem; }
  .brand img { width: 56px; }
  .hero { min-height: auto; }
  .hero h1 { font-size: clamp(2.8rem, 15vw, 4.4rem); }
  .hero-actions .button { width: 100%; }
  .hero-points { display: grid; }
  .hero-visual { min-height: 490px; }
  .portrait-card { width: min(82%, 360px); border-radius: 28px 28px 95px 28px; }
  .orbit-one { width: 430px; height: 430px; }
  .orbit-two { width: 320px; height: 460px; }
  .floating-note { min-width: 105px; padding: 10px 12px; }
  .note-one { left: 0; top: 11%; }
  .note-two { right: 0; bottom: 11%; }
  .expertise-grid, .work-grid, .climate-focus { grid-template-columns: 1fr; }
  .expertise-card { min-height: 310px; }
  .research-flow article { grid-template-columns: 50px 1fr; padding: 18px; }
  .research-flow article > span { width: 42px; height: 42px; }
  .forward-card, .contact-card { padding: 26px; }
  .contact-actions .button { width: 100%; }
  .footer-brand { align-items: flex-start; }
  .footer-links { gap: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}