:root {
  --about-navy: #0b1d37;
  --about-ink: #17283c;
  --about-muted: #546779;
  --about-lime: #93da49;
  --about-blue: #1d57a5;
  --about-line: #d8e1e9;
  --about-paper: #f5f8fa;
  --about-white: #fff;
}

.about-r2-page { color: var(--about-ink); background: var(--about-white); }
.about-r2-page h1,
.about-r2-page h2,
.about-r2-page h3,
.about-r2-page p { margin-top: 0; }

.about-r2-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #247a3d;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.about-r2-eyebrow::before {
  content: "";
  width: 38px;
  height: 3px;
  background: var(--about-lime);
}

.about-r2-hero {
  position: relative;
  overflow: hidden;
  color: var(--about-white);
  background: var(--about-navy);
}

.about-r2-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: clamp(-150px, -7vw, -70px);
  width: clamp(310px, 38vw, 600px);
  height: 100%;
  background: #12345d;
  clip-path: polygon(32% 0, 100% 0, 100% 100%, 0 100%);
  opacity: .48;
  pointer-events: none;
}

.about-r2-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(360px, .94fr);
  gap: clamp(52px, 8vw, 118px);
  align-items: center;
  min-height: 640px;
  padding-block: clamp(78px, 9vw, 126px);
}

.about-r2-hero .about-r2-eyebrow { color: var(--about-lime); }
.about-r2-hero-copy h1 {
  max-width: 770px;
  margin: 24px 0 28px;
  color: var(--about-white);
  font-size: clamp(48px, 6vw, 82px);
  line-height: .98;
  letter-spacing: -.055em;
}
.about-r2-hero-copy h1 > span { display: block; }
.about-r2-hero-copy h1 em { color: var(--about-lime); font-style: normal; }
.about-r2-hero-copy > p { max-width: 660px; color: #ccd9e5; font-size: clamp(17px, 1.55vw, 20px); line-height: 1.72; }
.about-r2-anchor {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
  padding: 0 20px;
  color: var(--about-navy);
  background: var(--about-lime);
  border: 1px solid var(--about-lime);
  border-radius: 8px;
  text-decoration: none;
  font-weight: 800;
}
.about-r2-anchor:hover { background: #a7e767; }

.about-r2-hero-years { position: relative; display: grid; gap: 1px; padding-left: 38px; }
.about-r2-hero-years::before {
  content: "";
  position: absolute;
  top: 28px;
  bottom: 28px;
  left: 7px;
  width: 2px;
  background: rgba(147, 218, 73, .58);
}
.about-r2-hero-years > div { position: relative; padding: 22px 24px 24px; background: rgba(255,255,255,.075); border-bottom: 1px solid rgba(255,255,255,.14); }
.about-r2-hero-years > div::before {
  content: "";
  position: absolute;
  top: 30px;
  left: -37px;
  width: 14px;
  height: 14px;
  background: var(--about-lime);
  border: 4px solid var(--about-navy);
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(147,218,73,.55);
}
.about-r2-hero-years time,
.about-r2-hero-years .about-r2-current { display: block; color: var(--about-white); font-size: clamp(34px, 4vw, 54px); font-weight: 800; line-height: 1; letter-spacing: -.05em; }
.about-r2-hero-years > div > span:not(.about-r2-current) { display: block; margin-top: 10px; color: var(--about-lime); font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.about-r2-hero-years p { margin: 8px 0 0; color: #c9d6e3; font-size: 14px; line-height: 1.55; }

.about-r2-section { padding: clamp(76px, 9vw, 128px) 0; }
.about-r2-heading { max-width: 850px; margin-bottom: clamp(42px, 6vw, 72px); }
.about-r2-heading h2,
.about-r2-story h2,
.about-r2-closing h2 { margin: 18px 0 20px; font-size: clamp(38px, 4.6vw, 64px); }
.about-r2-heading > p { max-width: 760px; color: var(--about-muted); font-size: 18px; line-height: 1.72; }

.about-r2-story { scroll-margin-top: 112px; }
.about-r2-story-grid { display: grid; grid-template-columns: minmax(300px, .82fr) minmax(0, 1.18fr); gap: clamp(52px, 8vw, 112px); align-items: start; }
.about-r2-story header { position: sticky; top: 118px; }
.about-r2-story-copy { display: grid; gap: 24px; color: var(--about-muted); font-size: 17px; line-height: 1.78; }
.about-r2-story-copy p:last-child { margin: 12px 0 0; padding: 20px 22px; color: #294866; background: #eef5fb; border-left: 4px solid var(--about-blue); font-size: 14px; }

.about-r2-history { background: var(--about-paper); }
.about-r2-timeline { position: relative; display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.about-r2-timeline::before { content: ""; position: absolute; top: 24px; bottom: 24px; left: 116px; width: 2px; background: #c4d4e2; }
.about-r2-timeline li { position: relative; display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 44px; min-height: 132px; padding-bottom: 30px; }
.about-r2-timeline li::before { content: ""; position: absolute; top: 13px; left: 110px; width: 14px; height: 14px; background: var(--about-white); border: 4px solid var(--about-blue); border-radius: 50%; }
.about-r2-timeline time,
.about-r2-timeline .about-r2-period { padding-top: 8px; color: var(--about-blue); font-size: 18px; font-weight: 800; text-align: right; }
.about-r2-timeline li > div { padding: 4px 0 22px; border-bottom: 1px solid var(--about-line); }
.about-r2-timeline h3 { margin-bottom: 10px; font-size: 25px; }
.about-r2-timeline p { max-width: 820px; margin-bottom: 0; color: var(--about-muted); }

.about-r2-source-note { margin: 20px 0 0 140px; color: var(--about-muted); font-size: 13px; }
.about-r2-source { color: var(--about-blue); text-underline-offset: 4px; font-weight: 750; }

.about-r2-versions { color: #d7e1ec; background: var(--about-navy); }
.about-r2-versions .about-r2-eyebrow { color: var(--about-lime); }
.about-r2-versions h2,
.about-r2-versions h3 { color: var(--about-white); }
.about-r2-versions .about-r2-heading > p { color: #bdcad7; }
.about-r2-version-list { display: grid; gap: 1px; margin: 0; padding: 0; background: rgba(255,255,255,.16); list-style: none; }
.about-r2-version-list li { display: grid; grid-template-columns: minmax(210px, .36fr) minmax(0, 1fr); gap: clamp(28px, 4vw, 66px); padding: clamp(24px, 3vw, 38px); background: #102845; }
.about-r2-version-date span { display: block; color: var(--about-lime); font-size: 10px; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.about-r2-version-date time,
.about-r2-version-date .about-r2-period { display: block; margin-top: 10px; color: var(--about-white); font-size: clamp(22px, 2.3vw, 31px); font-weight: 800; line-height: 1.15; }
.about-r2-version-list h3 { margin-bottom: 12px; font-size: 26px; }
.about-r2-version-list p { max-width: 760px; margin-bottom: 14px; color: #c6d3df; }
.about-r2-version-list .about-r2-source { color: #bfe78f; font-size: 13px; }

.about-r2-purpose { background: #eaf2f8; }
.about-r2-purpose-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.about-r2-purpose-grid article { min-height: 360px; padding: clamp(30px, 4vw, 52px); background: var(--about-white); border-top: 5px solid var(--about-lime); box-shadow: 0 20px 48px rgba(18,52,93,.08); }
.about-r2-purpose-grid article:last-child { border-top-color: var(--about-blue); }
.about-r2-purpose-grid h3 { margin: 0; color: #247a3d; font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.about-r2-purpose-grid p { margin: 28px 0 0; color: var(--about-ink); font-size: clamp(22px, 2.25vw, 32px); line-height: 1.4; }

.about-r2-values-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.about-r2-values-grid article { position: relative; min-height: 330px; padding: clamp(30px, 4vw, 48px); background: var(--about-white); border: 1px solid var(--about-line); box-shadow: 0 18px 44px rgba(18,52,93,.07); }
.about-r2-values-grid article > span { position: absolute; top: 26px; right: 30px; color: #d5e4ef; font-size: 54px; font-weight: 800; line-height: 1; }
.about-r2-values-grid h3 { position: relative; max-width: 410px; margin-bottom: 32px; padding: 0 0 20px; padding-right: 76px; font-size: 30px; }
.about-r2-values-grid h3::after { content: ""; position: absolute; bottom: 0; left: 0; width: 46px; height: 4px; background: var(--about-lime); }
.about-r2-values-grid p { color: var(--about-muted); }
.about-r2-values-grid p + p { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--about-line); }
.about-r2-values-grid strong { color: var(--about-ink); }

.about-r2-closing { padding: clamp(72px, 9vw, 118px) 0; color: var(--about-white); background: #12345d; }
.about-r2-closing .site-shell { max-width: 940px; margin-inline: auto; text-align: center; }
.about-r2-closing .about-r2-eyebrow { color: var(--about-lime); }
.about-r2-closing h2 { color: var(--about-white); }
.about-r2-closing p { max-width: 800px; margin: 0 auto; color: #d1dce7; font-size: 19px; line-height: 1.75; }

/* About R3: one research-led chronology. */
.about-r3-hero-grid { grid-template-columns: minmax(0, 1fr); }
.about-r3-hero-grid { min-height: 0; padding-block: 54px 62px; }
.about-r3-hero-grid .about-r2-hero-copy h1 { max-width: 1120px; font-size: clamp(48px, 4.25vw, 68px); line-height: 1.02; }
.about-r3-hero-grid .about-r2-hero-copy > p { max-width: 1040px; }
.about-r3-history { background: linear-gradient(180deg, #f5f8fa 0%, #fff 100%); }
.about-r3-timeline::before { background: linear-gradient(var(--about-blue), var(--about-lime)); }
.about-r3-timeline li { min-height: 118px; }
.about-r3-timeline li::before { background: var(--about-white); }
.about-r3-timeline li:last-child::before { background: var(--about-lime); border-color: var(--about-navy); box-shadow: 0 0 0 6px rgba(147,218,73,.18); }
.about-r3-timeline h3 { max-width: 760px; }
.about-r3-timeline p { line-height: 1.65; }

@media (max-width: 980px) {
  .about-r2-hero-grid,
  .about-r2-story-grid { grid-template-columns: 1fr; }
  .about-r2-hero-years { max-width: 760px; }
  .about-r2-story header { position: static; }
}

@media (max-width: 720px) {
  .about-r2-hero-grid { min-height: 0; padding-block: 68px 78px; }
  .about-r2-hero-copy h1 { font-size: clamp(42px, 12vw, 60px); }
  .about-r2-hero::before { right: -220px; }
  .about-r2-timeline::before { left: 7px; }
  .about-r2-timeline li { grid-template-columns: 1fr; gap: 8px; min-height: 0; padding: 0 0 36px 34px; }
  .about-r2-timeline li::before { top: 9px; left: 0; }
  .about-r2-timeline time,
  .about-r2-timeline .about-r2-period { padding: 0; text-align: left; }
  .about-r2-source-note { margin-left: 34px; }
  .about-r2-version-list li,
  .about-r2-purpose-grid,
  .about-r2-values-grid { grid-template-columns: 1fr; }
  .about-r2-purpose-grid article,
  .about-r2-values-grid article { min-height: 0; }
}

@media (max-width: 430px) {
  .about-r2-hero-copy h1 { font-size: 40px; }
  .about-r2-hero-years { padding-left: 30px; }
  .about-r2-hero-years > div { padding-inline: 18px; }
  .about-r2-hero-years > div::before { left: -29px; }
  .about-r2-purpose-grid p { font-size: 21px; }
  .about-r2-values-grid h3 { font-size: 26px; }
}

@media print {
  .about-r2-hero,
  .about-r2-versions,
  .about-r2-closing { color: #000; background: #fff; }
  .about-r2-hero::before { display: none; }
  .about-r2-hero h1,
  .about-r2-hero h1 em,
  .about-r2-versions h2,
  .about-r2-versions h3,
  .about-r2-closing h2 { color: #13294b; }
  .about-r2-hero-copy > p,
  .about-r2-versions .about-r2-heading > p,
  .about-r2-version-list p,
  .about-r2-closing p { color: #333; }
  .about-r2-hero-years,
  .about-r2-anchor { display: none; }
  .about-r2-version-list li { break-inside: avoid; background: #fff; border: 1px solid #ccd5de; }
  .about-r2-version-date time,
  .about-r2-version-date .about-r2-period { color: #13294b; }
  .about-r2-source,
  .about-r2-eyebrow,
  .about-r2-version-date span { color: #13294b; }
}