:root {
  --bg: #f5f7f5;
  --surface: #ffffff;
  --soft: #edf3ef;
  --ink: #111816;
  --muted: #69726e;
  --line: rgba(17, 24, 22, 0.12);
  --dark: #0c1210;
  --dark-muted: #aeb9b4;
  --accent: #67d1a0;
  --accent-deep: #1d7b57;
  --radius-lg: 32px;
  --radius-md: 22px;
  --shadow: 0 18px 60px rgba(17, 24, 22, 0.08);
  --shell: min(1180px, calc(100vw - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
img { max-width: 100%; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 1000;
  background: #fff;
  color: #111;
  padding: 10px 14px;
  border-radius: 12px;
  transition: top .2s ease;
}
.skip-link:focus { top: 16px; }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
}
.site-header.scrolled {
  background: rgba(245, 247, 245, 0.78);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-color: rgba(17, 24, 22, 0.08);
}
.nav-shell {
  width: var(--shell);
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  font-size: 13px;
  font-weight: 750;
  letter-spacing: .18em;
  text-decoration: none;
}
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a {
  font-size: 13px;
  text-decoration: none;
  color: rgba(17, 24, 22, .72);
  transition: color .2s ease;
}
.nav-links a:hover, .nav-links a:focus-visible { color: var(--ink); }
.nav-contact {
  padding: 8px 14px;
  background: rgba(17, 24, 22, .06);
  border-radius: 999px;
}

.shell { width: var(--shell); margin: 0 auto; }
.narrow { max-width: 900px; }
.centered { text-align: center; }
.section-light { background: var(--surface); }
.section-soft { background: var(--soft); }
.section-dark { background: var(--dark); color: #f7fbf8; }

.eyebrow {
  margin: 0 0 24px;
  font-size: 12px;
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow.dark { color: var(--accent-deep); }

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { letter-spacing: -.035em; }
h1 {
  margin-bottom: 34px;
  max-width: 1000px;
  font-size: clamp(4rem, 8vw, 7.6rem);
  line-height: .93;
  font-weight: 620;
}
h2 {
  margin-bottom: 28px;
  font-size: clamp(2.75rem, 5.2vw, 5rem);
  line-height: 1;
  font-weight: 610;
}
h3 {
  margin-bottom: 12px;
  font-size: 27px;
  line-height: 1.08;
  font-weight: 620;
}
p {
  font-size: 18px;
  line-height: 1.65;
  color: var(--muted);
}
.section-dark p { color: var(--dark-muted); }

.hero {
  position: relative;
  min-height: 94vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  isolation: isolate;
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 150px 0 110px;
}
.hero-lead {
  max-width: 730px;
  margin-bottom: 38px;
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  color: #c2cbc7 !important;
}
.text-link {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  font-size: 16px;
  font-weight: 600;
  color: #f2f7f4;
  text-decoration: none;
}
.text-link span { color: var(--accent); transition: transform .2s ease; }
.text-link:hover span { transform: translateY(3px); }
.hero-atmosphere { position: absolute; inset: 0; z-index: 0; }
.orb { position: absolute; display: block; border-radius: 999px; filter: blur(18px); opacity: .45; }
.orb-one {
  width: 44vw; height: 44vw; right: -12vw; top: 8vh;
  background: radial-gradient(circle at 35% 35%, rgba(103,209,160,.55), rgba(18,72,56,.08) 68%, transparent 72%);
}
.orb-two {
  width: 36vw; height: 36vw; right: 18vw; bottom: -22vw;
  background: radial-gradient(circle, rgba(65,130,108,.25), transparent 68%);
}
.mesh {
  position: absolute; inset: 0;
  opacity: .22;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, transparent 0, black 20%, black 72%, transparent 100%);
}

.statement { padding: 160px 0; }
.statement h2 { max-width: 850px; }
.statement-copy { max-width: 760px; font-size: clamp(1.2rem, 2vw, 1.55rem); }
.statement-copy.muted { color: #909894; }

.focus-section { padding: 150px 0; }
.section-heading { margin-bottom: 58px; }
.section-heading h2 { max-width: 820px; }
.focus-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.focus-card {
  min-height: 360px;
  padding: 32px;
  border: 1px solid rgba(17,24,22,.08);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.72);
  box-shadow: 0 1px 0 rgba(255,255,255,.7) inset;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform .3s ease, box-shadow .3s ease, background .3s ease;
}
.focus-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); background: #fff; }
.focus-index {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--accent-deep);
}
.focus-card p { margin-bottom: 0; max-width: 520px; }

.stage-section { padding: 160px 0 120px; }
.stage-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 100px; align-items: start; }
.stage-intro { position: sticky; top: 120px; }
.stage-intro p { max-width: 510px; }
.stage-list { list-style: none; padding: 0; margin: 0; }
.stage-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 28px;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}
.stage-list li:last-child { border-bottom: 1px solid var(--line); }
.stage-number { font-size: 13px; font-weight: 700; color: #909894; padding-top: 7px; }
.stage-list p { margin-bottom: 0; }
.stage-list .is-current h3 { color: var(--accent-deep); }
.stage-list .is-current .stage-number { color: var(--accent-deep); }
.note {
  margin-top: 72px;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: #7a827e;
}

.approach-section { padding: 160px 0; }
.approach-section h2 { max-width: 950px; }
.approach-lead { max-width: 800px; font-size: clamp(1.18rem, 2vw, 1.5rem); }
.principles {
  margin-top: 90px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid rgba(255,255,255,.12);
}
.principles > div { padding: 28px 28px 0 0; }
.principles span { display: block; margin-bottom: 14px; font-size: 18px; font-weight: 650; color: #f3f7f5; }
.principles p { margin-bottom: 0; font-size: 15px; }

.mekong-section { padding: 155px 0; }
.mekong-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 90px; }
.mekong-copy { padding-top: 42px; }
.mekong-copy p { max-width: 560px; }

.ahead-section { padding: 150px 0; }
.ahead-section p { max-width: 720px; margin-left: auto; margin-right: auto; }

.contact-section { padding: 145px 0; }
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: end; }
.contact-copy { display: flex; flex-direction: column; align-items: flex-start; }
.contact-copy p { max-width: 540px; }
.email-link {
  display: inline-block;
  margin: 12px 0 18px;
  font-size: clamp(1.7rem, 3vw, 2.8rem);
  letter-spacing: -.035em;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.contact-copy span { color: #7d8581; font-size: 14px; }

.site-footer { background: var(--surface); border-top: 1px solid var(--line); padding: 34px 0; }
.footer-layout { display: flex; align-items: center; justify-content: space-between; gap: 24px; color: #727b77; font-size: 13px; }
.footer-layout div { display: flex; align-items: center; gap: 16px; }
.footer-layout strong { color: var(--ink); letter-spacing: .14em; font-size: 12px; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s cubic-bezier(.2,.65,.3,1), transform .7s cubic-bezier(.2,.65,.3,1); }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 900px) {
  :root { --shell: min(100% - 36px, 1180px); }
  .nav-links a:not(.nav-contact) { display: none; }
  .hero { min-height: 88vh; }
  .hero-content { padding: 130px 0 88px; }
  .statement, .focus-section, .stage-section, .approach-section, .mekong-section, .ahead-section, .contact-section { padding-top: 110px; padding-bottom: 110px; }
  .focus-grid, .stage-layout, .mekong-layout, .contact-layout { grid-template-columns: 1fr; }
  .stage-layout, .mekong-layout, .contact-layout { gap: 54px; }
  .stage-intro { position: static; }
  .principles { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 0; }
  .mekong-copy { padding-top: 0; }
}

@media (max-width: 640px) {
  :root { --shell: calc(100vw - 28px); }
  .nav-shell { min-height: 58px; }
  .brand { font-size: 12px; }
  .nav-contact { padding: 7px 12px; }
  h1 { font-size: clamp(3.25rem, 15vw, 4.8rem); }
  h2 { font-size: clamp(2.5rem, 11vw, 3.8rem); }
  p { font-size: 17px; }
  .hero-content { padding-top: 120px; }
  .focus-grid { grid-template-columns: 1fr; }
  .focus-card { min-height: 310px; padding: 26px; border-radius: var(--radius-md); }
  .stage-list li { grid-template-columns: 44px 1fr; gap: 14px; }
  .principles { grid-template-columns: 1fr; }
  .principles > div { padding-right: 0; }
  .footer-layout, .footer-layout div { align-items: flex-start; flex-direction: column; }
  .footer-layout { gap: 18px; }
  .footer-layout div { gap: 8px; }
}

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