:root {
  --ink: #092638;
  --muted: #526a79;
  --teal: #007894;
  --teal-dark: #005d75;
  --paper: #f5f8f8;
  --line: #d7e3e6;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: Arial, Arial, Helvetica, sans-serif;
}
a { color: inherit; text-decoration: none; }

.site-nav {
  position: absolute;
  z-index: 20;
  top: 0;
  left: 50%;
  display: flex;
  width: min(1180px, calc(100% - 40px));
  height: 76px;
  align-items: center;
  justify-content: space-between;
  transform: translateX(-50%);
  color: #eafcff;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 720; letter-spacing: -.02em; }
.brand-mark { width: 21px; height: 21px; border: 2px solid #82e5eb; border-radius: 50% 45% 55% 42%; box-shadow: 8px -7px 0 -5px #82e5eb; }
.nav-links { display: flex; gap: 28px; color: #c9e9ee; font-size: .9rem; }
.nav-links a:hover { color: white; }

.hero {
  position: relative;
  min-height: 710px;
  overflow: hidden;
  background: linear-gradient(112deg, rgba(3, 27, 43, .98) 0%, rgba(0, 84, 106, .95) 58%, rgba(0, 132, 150, .88) 100%);
  color: white;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto -8% -240px 34%;
  height: 520px;
  border: 1px solid rgba(164, 245, 247, .28);
  border-radius: 50%;
  transform: rotate(-10deg);
  box-shadow: 0 0 0 60px rgba(72, 213, 220, .05), 0 0 0 130px rgba(72, 213, 220, .04);
}
.weather-orb { position: absolute; border-radius: 50%; filter: blur(2px); opacity: .65; }
.orb-one { width: 430px; height: 430px; right: 5%; top: 135px; background: radial-gradient(circle at 35% 35%, rgba(172,255,248,.6), rgba(14,165,177,.12) 45%, transparent 68%); }
.orb-two { width: 260px; height: 260px; right: 29%; top: 325px; border: 1px solid rgba(204,255,253,.22); }
.hero-inner { position: relative; z-index: 2; width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 154px 0 90px; }
.eyebrow, .kicker { margin: 0 0 20px; color: #8eeaf0; font-size: .78rem; font-weight: 760; letter-spacing: .14em; text-transform: uppercase; }
h1 { max-width: 980px; margin: 0; font-size: clamp(3.1rem, 6.2vw, 6.1rem); line-height: .98; letter-spacing: -.058em; }
.hero-deck { max-width: 760px; margin: 32px 0 24px; color: #d8f2f4; font-size: clamp(1.1rem, 1.9vw, 1.45rem); line-height: 1.55; }
.authors { max-width: 870px; margin: 0; font-weight: 620; line-height: 1.7; }
.affiliations { margin: 5px 0 0; color: #a8dce1; font-size: .92rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; min-height: 48px; align-items: center; gap: 10px; border: 1px solid rgba(255,255,255,.32); border-radius: 999px; padding: 0 22px; font-weight: 700; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: white; color: var(--teal-dark); }
.button-secondary { background: rgba(255,255,255,.08); color: white; backdrop-filter: blur(8px); }

.stats-band { position: relative; z-index: 4; display: grid; width: min(1050px, calc(100% - 40px)); margin: -42px auto 0; grid-template-columns: repeat(3, 1fr); overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: rgba(255,255,255,.96); box-shadow: 0 24px 70px rgba(14,51,68,.14); }
.stat { display: flex; min-height: 112px; flex-direction: column; justify-content: center; padding: 22px 32px; }
.stat + .stat { border-left: 1px solid var(--line); }
.stat strong { color: var(--teal); font-size: 2.25rem; line-height: 1; letter-spacing: -.05em; }
.stat span { margin-top: 8px; color: var(--muted); font-size: .88rem; }

.section { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 120px 0; }
.overview-slice { display: grid; grid-template-columns: .72fr 1.28fr; align-items: center; gap: 70px; }
.section-heading h2 { margin: 0; font-size: clamp(2.2rem, 4.2vw, 4rem); line-height: 1.05; letter-spacing: -.052em; }
.section-heading > p:last-child { margin: 26px 0 0; color: var(--muted); font-size: 1.05rem; line-height: 1.75; }
.section-heading .kicker { color: var(--teal); }
.poster-card { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: var(--paper); box-shadow: 0 24px 80px rgba(21,55,68,.12); }
.poster-card img { display: block; width: 100%; height: auto; }
.poster-card figcaption { padding: 16px 20px; color: var(--muted); font-size: .8rem; }
.overview-note { padding: 42px; border: 1px solid var(--line); border-radius: 22px; background: linear-gradient(145deg, #f3fafb, #eaf5f6); box-shadow: 0 24px 80px rgba(21,55,68,.09); }
.overview-note span { display: block; margin-bottom: 22px; color: var(--teal); font-size: .78rem; font-weight: 760; letter-spacing: .1em; text-transform: uppercase; }
.overview-note strong { display: block; font-size: clamp(1.45rem, 2.6vw, 2.15rem); line-height: 1.25; letter-spacing: -.035em; }
.overview-note p { margin: 24px 0 0; color: var(--muted); line-height: 1.7; }

.soft-section { background: var(--paper); border-block: 1px solid var(--line); }
.method-grid { display: grid; grid-template-columns: 1.35fr .65fr; align-items: center; gap: 70px; }
.figure-shell, .large-figure { overflow: hidden; margin: 0; border: 1px solid var(--line); border-radius: 24px; background: white; box-shadow: 0 24px 70px rgba(20,55,69,.1); }
.figure-shell img, .large-figure img { display: block; width: 100%; height: auto; }
.compact-heading h2 { font-size: clamp(2.5rem, 4.8vw, 4.7rem); }
.check-list { display: grid; gap: 14px; margin: 30px 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 28px; color: var(--ink); line-height: 1.5; }
.check-list li::before { content: ""; position: absolute; left: 0; top: .48em; width: 12px; height: 12px; border: 3px solid var(--teal); border-radius: 50%; }

.scaling-section { padding-block: 140px; }
.centered-heading { max-width: 820px; margin: 0 auto 58px; text-align: center; }
.centered-heading .kicker { color: var(--teal); }
.centered-heading > p:last-child { max-width: 700px; margin-inline: auto; }
.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.metric-card { min-height: 260px; padding: 34px; border: 1px solid var(--line); border-radius: 22px; background: #f7fafb; }
.metric-card span { color: var(--teal); font-size: .78rem; font-weight: 760; letter-spacing: .09em; text-transform: uppercase; }
.metric-card strong { display: block; margin-top: 42px; font-size: clamp(3rem, 5vw, 5rem); line-height: .9; letter-spacing: -.07em; }
.metric-card p { margin: 18px 0 0; color: var(--muted); }
.metric-featured { background: var(--teal); color: white; }
.metric-featured span, .metric-featured p { color: #d9fbff; }

.results-section { background: #062c3e; color: white; }
.results-section .section { padding-block: 135px; }
.results-heading { display: grid; grid-template-columns: 1.12fr .88fr; align-items: end; gap: 70px; margin-bottom: 58px; }
.results-heading h2 { max-width: 700px; }
.results-heading > p { margin: 0; color: #c4e0e5; font-size: 1.05rem; line-height: 1.7; }
.results-heading .kicker { color: #6ce0e9; }
.dark-figure { border-color: rgba(255,255,255,.12); box-shadow: 0 28px 90px rgba(0,0,0,.22); }

.case-section { padding-block: 140px; }
.case-copy-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 24px; }
.case-copy-grid article { position: relative; min-height: 220px; padding: 34px 34px 34px 84px; border: 1px solid var(--line); border-radius: 20px; }
.case-copy-grid h3 { margin: 0; font-size: 1.45rem; letter-spacing: -.03em; }
.case-copy-grid p { margin: 14px 0 0; color: var(--muted); line-height: 1.65; }
.case-index { position: absolute; left: 28px; top: 35px; color: var(--teal); font-size: .72rem; font-weight: 800; letter-spacing: .12em; }

.summary-section { overflow: hidden; background: linear-gradient(120deg, #006e89, #0098a7); color: white; }
.summary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; padding-block: 125px; }
.summary-grid h2 { max-width: 650px; margin: 0; font-size: clamp(2.7rem, 5vw, 5rem); line-height: 1; letter-spacing: -.06em; }
.summary-points { display: grid; align-content: center; gap: 0; }
.summary-points p { margin: 0; padding: 22px 0; border-bottom: 1px solid rgba(255,255,255,.24); color: #dcf9fb; font-size: 1.05rem; line-height: 1.6; }
.summary-points p:first-child { border-top: 1px solid rgba(255,255,255,.24); }
.summary-points strong { color: white; }

.resources-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; padding-block: 125px; }
.resources-heading h2 { font-size: clamp(2.4rem, 4.5vw, 4.4rem); }
.resource-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.resource-button { border-color: var(--line); color: var(--teal-dark); }
.resource-button:hover { background: var(--paper); }
.button-muted { cursor: default; color: #7b8d97; }
.button-muted:hover { transform: none; background: transparent; }
.citation-card { overflow: hidden; align-self: end; border: 1px solid var(--line); border-radius: 20px; background: #082d3e; color: white; }
.citation-card > p { margin: 0; padding: 16px 22px; border-bottom: 1px solid rgba(255,255,255,.12); color: #86dfe6; font-size: .75rem; font-weight: 760; letter-spacing: .1em; text-transform: uppercase; }
.citation-card pre { overflow-x: auto; margin: 0; padding: 24px; color: #d7eef1; font-family: SFMono-Regular, Consolas, monospace; font-size: .78rem; line-height: 1.6; }

footer { display: flex; width: min(1180px, calc(100% - 40px)); margin: 0 auto; align-items: end; justify-content: space-between; gap: 30px; padding: 40px 0 55px; border-top: 1px solid var(--line); color: var(--muted); font-size: .82rem; }
.footer-brand { color: var(--ink); }
footer p { margin: 12px 0 0; }

@media (max-width: 760px) {
  .nav-links { display: none; }
  .hero { min-height: 760px; }
  .hero-inner { padding-top: 135px; }
  .stats-band { grid-template-columns: 1fr; margin-top: -32px; }
  .stat + .stat { border-top: 1px solid var(--line); border-left: 0; }
  .overview-slice { grid-template-columns: 1fr; gap: 42px; padding-top: 90px; }
  .method-grid, .results-heading, .summary-grid, .resources-section { grid-template-columns: 1fr; gap: 44px; }
  .method-grid { padding-block: 90px; }
  .metric-grid, .case-copy-grid { grid-template-columns: 1fr; }
  .scaling-section, .case-section { padding-block: 95px; }
  .results-section .section { padding-block: 95px; }
  .case-copy-grid article { padding-left: 72px; }
  .summary-grid { padding-block: 90px; }
  .resources-section { padding-block: 90px; }
  footer { align-items: flex-start; flex-direction: column; }
}