/* ============================================================
   NIPURE — editorial cream canvas + forest-green trinity
   Concept adapted from the STF4SW / Claude.com design system:
   cream canvas · serif display · single accent · dark surface.
   Accent = NIPURE leaf green; dark surface = deep forest green.
   ============================================================ */

:root {
  /* Brand & accent */
  --primary: #2e7d46;          /* green CTA — accessible white text */
  --primary-active: #23623600;
  --primary-active: #236236;
  --accent: #6fbf3f;           /* bright leaf green (from logo) */
  --accent-soft: #a7d96a;

  /* Surface */
  --canvas: #faf9f5;           /* warm cream floor */
  --surface-soft: #f3f4ec;
  --surface-card: #eef0e6;     /* sage-cream feature cards */
  --surface-cream-strong: #e6e9da;
  --surface-dark: #0f3d2e;     /* deep forest green */
  --surface-dark-elevated: #17513d;
  --surface-dark-soft: #0c3325;
  --hairline: #e3e2d8;
  --hairline-soft: #ecebe2;

  /* Text */
  --ink: #14201a;
  --body-strong: #24302a;
  --body: #3d453f;
  --muted: #6a716a;
  --muted-soft: #8b918a;
  --on-primary: #ffffff;
  --on-dark: #f3f6ee;
  --on-dark-soft: #9db3a3;

  /* Type */
  --serif: "Cormorant Garamond", "EB Garamond", Garamond, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;

  --maxw: 1180px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --shadow-soft: 0 1px 3px rgba(20,20,19,.06), 0 8px 30px rgba(20,32,26,.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--body);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -.015em;
  margin: 0;
}
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- BRAND WORDMARK: bold "Ni" + italic serif "Pure" (echoes the tree-i logo) ---------- */
.brand-ni { font-family: "Montserrat", var(--sans); font-weight: 700; font-style: normal; }
.brand-pure {
  font-family: var(--serif); font-style: italic; font-weight: 600;
  color: var(--primary); padding-right: .06em;
}
.quake .brand-pure, .science .brand-pure, .footer .brand-pure { color: var(--accent); }
.footer .brand-ni { color: #fff; }

.eyebrow {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 18px;
}
.eyebrow--onDark { color: var(--accent); }

.accent { color: var(--primary); }
.accent-strong { color: var(--primary); font-weight: 600; }

/* ---------- NAV ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; padding: 0 28px;
  background: rgba(250,249,245,.82);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--hairline);
}
.nav__brand { display: flex; align-items: center; gap: 11px; }
.nav__brand img { height: 36px; width: auto; object-fit: contain; display: block; }
.nav__links { display: flex; align-items: center; gap: 26px; }
.nav__links a { font-size: 14px; font-weight: 500; color: var(--body); transition: color .15s; }
.nav__links a:hover { color: var(--ink); }
.nav__cta {
  background: var(--primary); color: var(--on-primary) !important;
  padding: 8px 15px; border-radius: var(--radius-md); font-weight: 600 !important;
}
.nav__cta:hover { background: var(--primary-active); }

/* ---------- HERO / DESCENT ---------- */
.descent { position: relative; }
.descent__track { height: 210vh; }
.descent__sticky {
  position: sticky; top: 0; height: 100vh; overflow: hidden;
  display: flex; align-items: center;
}
@media (max-height: 760px) {
  .descent__sticky { align-items: flex-start; }
  .descent__copy { padding-top: 88px; }
}
.descent__frames { position: absolute; inset: 0; z-index: 0; }
.descent__frame { position: absolute; inset: 0; margin: 0; }
.descent__frame img { width: 100%; height: 100%; object-fit: cover; will-change: transform; transform: translateZ(0); }
.descent__frame.is-fallback {
  background:
    radial-gradient(120% 90% at 60% 78%, rgba(111,191,63,.28), transparent 55%),
    linear-gradient(180deg, #145238 0%, #0f3d2e 55%, #0a2b20 100%);
}
.descent__frame.is-fallback img { display: none; }
/* scrim so copy is always legible over the photo */
.descent__sticky::after {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(9,30,22,.78) 0%, rgba(9,30,22,.5) 42%, rgba(9,30,22,.12) 72%, rgba(9,30,22,.32) 100%),
    linear-gradient(180deg, rgba(9,30,22,.35) 0%, transparent 30%, rgba(9,30,22,.5) 100%);
}
.descent__lens {
  position: absolute; z-index: 2; left: 60%; top: 78%;
  width: 0; height: 0;
}

.descent__copy {
  position: relative; z-index: 3;
  max-width: 620px; padding: 0 28px; margin-left: max(28px, calc((100vw - var(--maxw)) / 2));
  color: var(--on-dark);
}
.hero__logo {
  height: 116px; width: auto; object-fit: contain; margin-bottom: 26px;
  filter: drop-shadow(0 4px 16px rgba(0,0,0,.45));
}
.hero__title {
  font-size: clamp(40px, 6vw, 74px); line-height: 1.02; color: #fff;
  letter-spacing: -.02em; margin-bottom: 22px;
}
.hero__subtitle { font-size: 18px; line-height: 1.6; color: rgba(243,246,238,.9); max-width: 540px; margin-bottom: 22px; }
.hero__hook { display: block; font-size: 21px; color: #fff; font-weight: 500; margin-bottom: 8px; }
.hero__hook .accent { color: var(--accent); }
.hero__meta { font-size: 14px; color: rgba(243,246,238,.72); margin-bottom: 30px; }
.hero__meta-link { color: var(--accent-soft); border-bottom: 1px solid rgba(167,217,106,.4); }
.hero__meta .accent-strong { color: var(--accent); }
.hero__scroll {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 14px; font-weight: 600; color: #fff;
  padding: 12px 20px; border: 1px solid rgba(243,246,238,.3); border-radius: 999px;
  transition: background .18s, border-color .18s;
}
.hero__scroll:hover { background: rgba(243,246,238,.1); border-color: rgba(243,246,238,.55); }
.hero__scroll-arrow { animation: bob 1.8s ease-in-out infinite; }
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(4px); } }

.funding-note--hero {
  margin-top: 30px; max-width: 500px;
  background: rgba(12,51,37,.55); border: 1px solid rgba(111,191,63,.28);
  border-radius: var(--radius-lg); padding: 18px 20px;
  backdrop-filter: blur(4px);
}
.funding-note__badge {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--surface-dark);
  background: var(--accent); padding: 3px 10px; border-radius: 999px; margin-bottom: 10px;
}
.funding-note p { font-size: 13.5px; line-height: 1.6; color: rgba(243,246,238,.86); margin: 0; }
.funding-note a { color: var(--accent-soft); border-bottom: 1px solid rgba(167,217,106,.4); margin-right: 6px; }

/* caption revealed on scroll (beat 2) */
.descent__caption {
  position: absolute; z-index: 3; right: max(28px, calc((100vw - var(--maxw)) / 2));
  bottom: 12%; max-width: 380px; color: var(--on-dark);
  opacity: 0; transform: translateY(20px); pointer-events: none;
}
.descent__caption h2 { color: #fff; font-size: 30px; line-height: 1.15; margin: 8px 0 12px; }
.descent__caption p { font-size: 15px; color: rgba(243,246,238,.85); margin: 0; }

/* ---------- WHY / PROBLEM ---------- */
.quake { background: var(--surface-dark); color: var(--on-dark); padding: 96px 0; }
.quake__inner { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: center; }
.quake__eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 18px;
}
.quake__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 rgba(111,191,63,.6); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(111,191,63,.5);} 70% { box-shadow: 0 0 0 12px rgba(111,191,63,0);} 100% { box-shadow: 0 0 0 0 rgba(111,191,63,0);} }
.quake__title { color: #fff; font-size: clamp(32px, 4vw, 48px); line-height: 1.08; margin-bottom: 22px; }
.quake__lead { font-size: 18px; color: rgba(243,246,238,.85); margin-bottom: 8px; }
.quake__count { display: block; font-family: var(--serif); font-size: 64px; line-height: 1.1; color: var(--accent); font-weight: 600; }
.quake__tie { font-size: 15.5px; color: rgba(243,246,238,.72); max-width: 440px; margin-top: 16px; }

.whygrid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.whystat {
  background: var(--surface-dark-elevated); border: 1px solid rgba(111,191,63,.18);
  border-radius: var(--radius-lg); padding: 26px 24px;
}
.whystat__num { font-family: var(--serif); font-size: 42px; font-weight: 600; color: #fff; line-height: 1; letter-spacing: -.02em; }
.whystat__num span { font-size: 22px; color: var(--accent); margin-left: 3px; }
.whystat__lbl { font-size: 13.5px; color: var(--on-dark-soft); margin-top: 10px; }
.quake__src { grid-column: 1 / -1; font-size: 12.5px; color: var(--on-dark-soft); margin-top: 22px; }

/* ---------- IMPACT STRIP ---------- */
.impact-strip { background: var(--surface-cream-strong); border-block: 1px solid var(--hairline); }
.impact-strip__inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 40px 28px; }
.impact-stat { text-align: center; flex: 1; }
.impact-stat__num { display: block; font-family: var(--serif); font-size: 52px; font-weight: 600; color: var(--ink); line-height: 1; letter-spacing: -.02em; }
.impact-stat__label { display: block; font-size: 13px; color: var(--muted); margin-top: 8px; }
.impact-stat__div { width: 1px; height: 46px; background: var(--hairline); }

/* ---------- PROJECT ---------- */
.project { padding: 96px 0; }
.project > .container > h2 { font-size: clamp(30px, 3.6vw, 44px); line-height: 1.12; max-width: 820px; margin-bottom: 40px; }
.project__grid { max-width: 760px; }
.project__grid p { font-size: 17px; line-height: 1.7; color: var(--body); margin: 0 0 22px; }
.project__grid strong { color: var(--body-strong); font-weight: 600; }
.pullquote {
  font-family: var(--serif); font-size: 30px; line-height: 1.28; font-weight: 500;
  color: var(--primary); border-left: 3px solid var(--accent);
  margin: 34px 0; padding: 6px 0 6px 26px; font-style: italic;
}
.leafline { margin: 34px 0; text-align: center; }
.leafline svg { width: 100%; max-width: 620px; height: auto; margin: 0 auto; }
.leafline figcaption { margin-top: 8px; }
.leafline__hook { display: block; font-family: var(--serif); font-style: italic; font-size: 20px; color: var(--ink); }
.leafline__note { display: block; font-size: 13px; color: var(--muted); margin-top: 4px; }

/* ---------- PROJECT MEDIA + PHYSICS OVERLAY ---------- */
/* full-bleed: the figure breaks out of the container so no cream shows beside the frame */
.project__media { width: 100vw; margin: 0 calc(50% - 50vw) 40px; }
.project__media img { width: 100%; }
.project__media figcaption {
  font-size: 13.5px; color: var(--muted);
  max-width: var(--maxw); margin: 12px auto 0; padding: 0 28px;
}

.physics { position: relative; overflow: hidden; }
.physics img { display: block; width: 100%; border-radius: 0; box-shadow: none; }
.physics__overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: center; gap: 16px;
  /* align the text block with the page container even though the figure is full-bleed */
  padding: 40px 46px 40px max(46px, calc((100vw - var(--maxw)) / 2 + 28px));
  background: linear-gradient(90deg, rgba(6,18,12,.9) 0%, rgba(6,18,12,.62) 58%, transparent 100%);
  color: #eef3ea;
}
.physics__overlay > * { max-width: 560px; }
.physics__overlay .eyebrow { margin-bottom: 2px; }
.physics__eq { display: grid; gap: 3px; }
.physics__eq-name {
  font-size: 11px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent-soft);
}
.physics__eq-formula {
  font-family: var(--mono); font-size: clamp(15px, 1.9vw, 21px); color: #fff;
  text-shadow: 0 1px 8px rgba(0,0,0,.5);
}
.physics__eq-formula sub { font-size: .62em; }
.physics__note { font-size: 13.5px; line-height: 1.65; color: rgba(238,243,234,.88); margin: 4px 0 0; }
.physics__note strong { color: #fff; font-weight: 600; }
.physics__note .brand-pure { color: var(--accent-soft); }
.physics__note .brand-ni { color: #fff; }

@media (max-width: 820px) {
  .physics__overlay {
    position: static; max-width: none; padding: 24px 22px;
    background: var(--surface-dark);
  }
}

/* ---------- FEEDSTOCK BAND ---------- */
.feedstock { position: relative; min-height: 520px; display: flex; align-items: center; overflow: hidden; }
.feedstock__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.feedstock__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(9,30,22,.92) 0%, rgba(9,30,22,.72) 44%, rgba(9,30,22,.28) 78%, rgba(9,30,22,.5) 100%);
}
.feedstock__inner { position: relative; z-index: 2; padding: 90px 28px; max-width: var(--maxw); }
.feedstock__inner h2 { color: #fff; font-size: clamp(30px, 4vw, 46px); line-height: 1.1; margin-bottom: 20px; max-width: 620px; }
.feedstock__inner p { font-size: 16.5px; line-height: 1.7; color: rgba(243,246,238,.86); max-width: 560px; }

/* ---------- SCIENCE ---------- */
.science { background: var(--surface-dark); color: var(--on-dark); padding: 96px 0; }
.science__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.science__copy h2 { color: #fff; font-size: clamp(30px, 3.4vw, 42px); line-height: 1.12; margin-bottom: 22px; }
.science__copy p { font-size: 16px; line-height: 1.7; color: rgba(243,246,238,.82); margin-bottom: 26px; }
.science__copy strong { color: #fff; font-weight: 600; }
.science__copy em { color: var(--accent-soft); font-style: italic; }
.science__list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.science__list li { display: flex; align-items: center; gap: 14px; font-size: 15px; color: var(--on-dark); }
.science__list span {
  flex: none; width: 32px; height: 32px; border-radius: 8px;
  display: grid; place-items: center; font-family: var(--mono); font-size: 12px;
  color: var(--surface-dark); background: var(--accent); font-weight: 500;
}
.science__mol {
  background: var(--surface-dark-soft); border: 1px solid rgba(111,191,63,.2);
  border-radius: var(--radius-xl); padding: 30px;
}
.science__mol-eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; color: var(--accent); margin-bottom: 8px; }
.molecule { width: 100%; height: auto; }
.molecule .mol-bonds line { stroke: var(--on-dark-soft); stroke-width: 2.4; }
.molecule .mol-arrow { stroke: var(--accent); stroke-width: 3; marker-end: none; }
.molecule .atom circle { fill: var(--surface-dark-elevated); stroke: var(--on-dark-soft); stroke-width: 1.5; }
.molecule .atom text { fill: #fff; font-family: var(--sans); font-size: 15px; font-weight: 600; text-anchor: middle; }
.molecule .atom--o circle { fill: #7a3b32; stroke: #c46a5c; }
.molecule .atom--n circle { fill: #26527a; stroke: #5b9bd4; }
.molecule .atom--c circle { fill: var(--surface-dark-elevated); stroke: var(--accent); }
.science__mol-cap { font-size: 13.5px; color: var(--on-dark-soft); margin: 14px 0 0; }
.science__mol-cap strong { color: var(--accent-soft); }

/* ---------- TIMELINE ---------- */
.timeline { padding: 96px 0; }
.timeline__head { margin-bottom: 48px; }
.timeline__head h2 { font-size: clamp(30px, 3.6vw, 44px); line-height: 1.12; max-width: 720px; margin-bottom: 16px; }
.timeline__lead { font-size: 16px; color: var(--muted); max-width: 620px; }
.wps { display: grid; gap: 16px; }
.wp {
  display: grid; grid-template-columns: 92px 1fr; gap: 24px; align-items: start;
  background: var(--surface-card); border: 1px solid var(--hairline);
  border-radius: var(--radius-lg); padding: 26px 28px;
  opacity: 0; transform: translateY(22px);
}
.wp.is-in { opacity: 1; transform: none; transition: opacity .5s ease, transform .5s ease; }
.wp__no { font-family: var(--serif); font-size: 40px; font-weight: 600; color: var(--accent); line-height: 1; letter-spacing: -.02em; }
.wp__no small { display: block; font-family: var(--sans); font-size: 11px; letter-spacing: .12em; color: var(--muted); text-transform: uppercase; margin-top: 6px; }
.wp__title { font-family: var(--serif); font-size: 21px; color: var(--ink); margin: 0 0 6px; line-height: 1.25; }
.wp__meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.wp__tag { font-size: 12px; font-weight: 600; padding: 3px 11px; border-radius: 999px; background: var(--surface-cream-strong); color: var(--body-strong); }
.wp__tag--lead { background: var(--primary); color: #fff; }
.wp__tag--span { background: transparent; border: 1px solid var(--hairline); color: var(--muted); font-family: var(--mono); font-weight: 500; }
.wp__bar { height: 6px; border-radius: 999px; background: var(--surface-cream-strong); position: relative; overflow: hidden; }
.wp__bar-fill { position: absolute; top: 0; bottom: 0; border-radius: 999px; background: linear-gradient(90deg, var(--primary), var(--accent)); }
.wp__desc { font-size: 14.5px; color: var(--body); margin: 12px 0 0; }

/* ---------- PARTNERS ---------- */
.partners { padding: 96px 0; background: var(--surface-soft); }
.partners > .container > h2 { font-size: clamp(30px, 3.6vw, 44px); margin-bottom: 14px; }
.partners__lead { font-size: 16px; color: var(--muted); max-width: 600px; margin-bottom: 44px; }
.partners__list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pcard {
  background: var(--canvas); border: 1px solid var(--hairline);
  border-radius: var(--radius-lg); padding: 30px; display: flex; flex-direction: column;
  transition: box-shadow .2s, transform .2s;
}
.pcard:hover { box-shadow: var(--shadow-soft); transform: translateY(-3px); }
.pcard__logo { height: 46px; margin-bottom: 22px; display: flex; align-items: center; }
.pcard__logo img { max-height: 46px; width: auto; object-fit: contain; }
.pcard__role { font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--primary); margin-bottom: 8px; }
.pcard__role--partner { color: var(--muted); }
.pcard__name { font-family: var(--serif); font-size: 22px; color: var(--ink); margin: 0 0 4px; line-height: 1.2; }
.pcard__loc { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.pcard__site { font-size: 13.5px; font-weight: 600; color: var(--primary); margin-bottom: 18px; display: inline-flex; align-items: center; gap: 5px; }
.pcard__people { border-top: 1px solid var(--hairline); padding-top: 16px; margin-top: auto; display: grid; gap: 10px; }
.person { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.person__id { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.person__name { font-size: 14px; color: var(--body-strong); font-weight: 500; }
.person__role {
  font-size: 10.5px; font-weight: 600; letter-spacing: .09em;
  text-transform: uppercase; color: var(--primary);
}
.person__links { display: flex; gap: 8px; flex: none; }
.person__link {
  font-size: 11px; font-weight: 600; letter-spacing: .04em;
  padding: 2px 8px; border-radius: 6px; background: var(--surface-card); color: var(--muted);
  transition: background .15s, color .15s;
}
.person__link:hover { background: var(--primary); color: #fff; }

/* ---------- FOOTER ---------- */
.footer { background: var(--surface-dark); color: var(--on-dark-soft); padding: 64px 0 40px; }
.footer__top { display: flex; align-items: center; gap: 18px; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer__logo { height: 56px; width: auto; object-fit: contain; }
.footer__title { flex: 1; }
.footer__title strong { display: block; color: #fff; font-size: 18px; letter-spacing: .04em; }
.footer__title span { font-size: 13.5px; color: var(--on-dark-soft); }
.hanko {
  flex: none; width: 70px; height: 70px; border: 2px solid var(--accent); border-radius: 12px;
  display: grid; place-items: center; align-content: center; color: var(--accent);
  font-family: var(--serif); line-height: 1; text-align: center;
}
.hanko span:first-child { font-size: 22px; }
.hanko span:last-child { font-size: 15px; letter-spacing: .06em; }
.footer__cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; padding: 36px 0; }
.footer__cols h4 { color: #fff; font-family: var(--sans); font-size: 13px; letter-spacing: .1em; text-transform: uppercase; margin: 0 0 12px; }
.footer__cols p { font-size: 14px; line-height: 1.6; color: var(--on-dark-soft); margin: 0; }
.footer__cols strong { color: var(--on-dark); font-weight: 600; }
.footer__funders { padding: 30px 0; border-top: 1px solid rgba(255,255,255,.08); }
.footer__funders-label { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--on-dark-soft); }
.footer__funders-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 16px; }
.funder {
  border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius-md);
  padding: 12px 18px; transition: border-color .18s, background .18s;
}
.funder:hover { border-color: var(--accent); background: rgba(111,191,63,.08); }
.funder__mark { display: block; color: #fff; font-weight: 700; letter-spacing: .04em; }
.funder__sub { display: block; font-size: 12px; color: var(--on-dark-soft); margin-top: 2px; }
.footer__bottom { display: flex; justify-content: space-between; padding-top: 28px; font-size: 12.5px; color: var(--on-dark-soft); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .quake__inner, .science__inner { grid-template-columns: 1fr; gap: 40px; }
  .partners__list { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: 1fr; gap: 24px; }
  .descent__caption { display: none; }
  .descent__sticky { align-items: flex-start; }
  .descent__copy { padding-top: 84px; padding-bottom: 40px; }
  .hero__logo { height: 84px; }
}
@media (max-width: 720px) {
  .nav__links a:not(.nav__cta) { display: none; }
  .descent__track { height: 150vh; }
  .impact-strip__inner { flex-wrap: wrap; gap: 24px 0; }
  .impact-stat { flex-basis: 50%; }
  .impact-stat__div { display: none; }
  .whygrid { grid-template-columns: 1fr; }
  .wp { grid-template-columns: 1fr; gap: 14px; }
  .footer__bottom { flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto; }
  .wp { opacity: 1; transform: none; }
}