:root {
  --gsa-green: #4f642f;
  --gsa-green-dark: #11270f;
  --gsa-green-deep: #0b1b0c;
  --gsa-lime: #91ad43;
  --gsa-rust: #b67555;
  --gsa-orange: #f37021;
  --gsa-yellow: #f4c942;
  --gsa-cream: #f8f0e3;
  --gsa-cream-2: #fffaf2;
  --gsa-ocean: #007f91;
  --gsa-ocean-dark: #013746;
  --gsa-ink: #172017;
  --gsa-muted: #6c7468;
  --white: #ffffff;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, .12);
  --shadow-strong: 0 30px 90px rgba(0, 0, 0, .24);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  color: var(--gsa-ink);
  background: var(--gsa-cream-2);
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.page-switch {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  display: flex;
  gap: 8px;
  padding: 8px;
  background: rgba(255,255,255,.9);
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 999px;
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 45px rgba(0,0,0,.16);
}
.page-switch a {
  padding: 11px 16px;
  border-radius: 999px;
  color: #fff;
  font-size: 13px;
  font-weight: 900;
}
.page-switch .island-link { background: var(--gsa-green); }
.page-switch .ocean-link { background: var(--gsa-orange); }
.concept {
  position: relative;
  background: #fff;
  overflow: hidden;
}
.header {
  height: 88px;
  padding: 0 52px;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,.95);
  border-bottom: 1px solid rgba(16, 24, 40, .08);
  backdrop-filter: blur(16px);
}
.header.dark-logo-area {
  position: fixed;
  width: 100%;
  background: linear-gradient(180deg, rgba(0,0,0,.58), rgba(0,0,0,.06));
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.logo { width: 238px; height: auto; }
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 13px;
  font-weight: 900;
}
.header.dark-logo-area .nav,
.header.dark-logo-area .btn-outline {
  color: #fff;
}
.header.dark-logo-area .btn-outline {
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.48);
}
.nav a { position: relative; }
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 0;
  height: 3px;
  border-radius: 100px;
  background: var(--theme-accent);
  transition: width .25s ease;
}
.nav a:hover::after { width: 100%; }
.actions { display: flex; gap: 10px; align-items: center; }
.btn {
  min-height: 46px;
  padding: 0 22px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid transparent;
  font-size: 13px;
  font-weight: 900;
  transition: .25s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--theme-accent); color: #fff; }
.btn-outline { background: #fff; border-color: rgba(15,23,42,.18); color: var(--gsa-ink); }
.btn-ghost { color: #fff; border-color: rgba(255,255,255,.75); background: rgba(255,255,255,.06); backdrop-filter: blur(10px); }
.hero {
  min-height: 820px;
  position: relative;
  color: #fff;
  display: grid;
  align-items: center;
  padding: 140px 52px 150px;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 42%, rgba(255,255,255,.14), transparent 22%),
    linear-gradient(90deg, rgba(4,20,12,.82), rgba(4,30,28,.35) 48%, rgba(0,0,0,.08)),
    var(--hero-image) center / cover no-repeat;
}
.concept-ocean .hero {
  background:
    radial-gradient(circle at 78% 20%, rgba(255,255,255,.28), transparent 25%),
    linear-gradient(90deg, rgba(0,34,44,.86), rgba(0,108,126,.42) 52%, rgba(0,0,0,.08)),
    var(--hero-image) center / cover no-repeat;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(255,255,255,.12) 1px, transparent 1px),
    linear-gradient(180deg, transparent 72%, rgba(0,0,0,.32));
  background-size: 5px 5px, 100% 100%;
  opacity: .18;
  pointer-events: none;
}
.hero-inner {
  width: min(1420px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: .92fr .88fr;
  gap: 70px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-copy { max-width: 650px; }
.eyebrow {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  color: var(--theme-warm);
  font-size: 12px;
  font-weight: 950;
  letter-spacing: .22em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.eyebrow::before {
  content: "";
  width: 42px;
  height: 3px;
  background: currentColor;
  border-radius: 100px;
}
.hero h1 {
  margin: 0 0 24px;
  font-family: "Permanent Marker", cursive;
  font-size: clamp(72px, 7.5vw, 140px);
  line-height: .82;
  letter-spacing: -3px;
  text-transform: uppercase;
  text-shadow: 0 16px 45px rgba(0,0,0,.35);
}
.accent { color: var(--theme-accent); }
.hero p {
  max-width: 610px;
  margin: 0 0 30px;
  color: rgba(255,255,255,.94);
  font-size: 19px;
  line-height: 1.65;
  font-weight: 700;
  text-shadow: 0 8px 30px rgba(0,0,0,.32);
}
.hero-buttons { display: flex; flex-wrap: wrap; gap: 14px; }
.floating-panel {
  justify-self: end;
  width: min(480px, 100%);
  padding: 14px;
  border-radius: 30px;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.28);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-strong);
  transform: rotate(2.5deg);
  position: relative;
}
.floating-panel::before,
.floating-panel::after {
  content: "";
  position: absolute;
  width: 90px;
  height: 28px;
  background: rgba(255,255,255,.55);
  top: -14px;
  left: 50%;
  transform: translateX(-50%) rotate(-4deg);
  box-shadow: 0 10px 30px rgba(0,0,0,.12);
}
.floating-panel::after {
  top: auto;
  left: auto;
  right: -22px;
  bottom: 70px;
  transform: rotate(18deg);
}
.floating-panel img {
  width: 100%;
  height: 370px;
  object-fit: cover;
  border-radius: 22px;
}
.floating-panel .caption {
  padding: 17px 8px 3px;
  color: #fff;
  font-size: 17px;
  font-weight: 900;
}
.feature-bar {
  width: min(1420px, calc(100% - 72px));
  margin: -82px auto 0;
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-radius: 16px;
  overflow: hidden;
  background: rgba(21,39,20,.96);
  color: #fff;
  box-shadow: var(--shadow-strong);
}
.concept-ocean .feature-bar {
  background: rgba(255,255,255,.96);
  color: var(--gsa-ink);
}
.feature {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 15px;
  align-items: center;
  padding: 26px 24px;
  border-right: 1px solid rgba(255,255,255,.14);
}
.concept-ocean .feature { border-right: 1px solid rgba(15,23,42,.08); }
.feature:last-child { border-right: 0; }
.feature-icon {
  width: 50px;
  height: 50px;
  border: 2px solid currentColor;
  border-radius: 50%;
  color: var(--theme-warm);
  display: grid;
  place-items: center;
}
.feature svg { width: 24px; height: 24px; stroke-width: 1.8; }
.feature strong { display: block; font-size: 15px; margin-bottom: 4px; }
.feature span { display: block; font-size: 12px; line-height: 1.45; opacity: .86; }
.section {
  padding: 100px 52px;
  position: relative;
  overflow: hidden;
}
.cream { background: var(--gsa-cream); }
.white { background: #fff; }
.section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 8% 12%, rgba(83,100,47,.06), transparent 20%),
    radial-gradient(circle at 92% 88%, rgba(243,112,33,.055), transparent 22%);
  pointer-events: none;
}
.container { width: min(1420px, 100%); margin: 0 auto; position: relative; z-index: 2; }
.section-head {
  max-width: 720px;
  margin: 0 auto 54px;
  text-align: center;
}
.section-head h2,
.split-copy h2,
.cta h2 {
  margin: 0 0 16px;
  font-family: "Permanent Marker", cursive;
  color: var(--theme-heading);
  font-size: clamp(42px, 3.9vw, 68px);
  line-height: .98;
  letter-spacing: -1px;
}
.section-head p {
  margin: 0 auto;
  color: var(--gsa-muted);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 600;
}
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.audience-card {
  min-height: 330px;
  border-radius: 15px;
  padding: 24px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  color: #fff;
  background: var(--card-image) center / cover no-repeat;
  box-shadow: var(--shadow-soft);
  transition: transform .3s ease, box-shadow .3s ease;
}
.audience-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-strong); }
.audience-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.03), rgba(0,0,0,.84));
}
.audience-card > * { position: relative; z-index: 1; }
.audience-card h3 { margin: 0 0 9px; font-size: 25px; line-height: 1.05; }
.audience-card p { margin: 0 0 14px; color: rgba(255,255,255,.88); font-size: 14px; line-height: 1.55; }
.learn { font-size: 13px; font-weight: 950; color: var(--theme-warm); }
.program-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.program-card {
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(15,23,42,.07);
  transition: transform .3s ease, box-shadow .3s ease;
}
.program-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-strong); }
.program-card img { width: 100%; height: 185px; object-fit: cover; }
.program-body { padding: 20px; }
.tag {
  display: inline-flex;
  margin-bottom: 11px;
  font-size: 10px;
  font-weight: 950;
  text-transform: uppercase;
  letter-spacing: .09em;
  color: var(--theme-accent);
}
.program-body h3 { margin: 0 0 10px; font-size: 20px; line-height: 1.13; }
.program-body p { margin: 0 0 14px; color: var(--gsa-muted); font-size: 13px; line-height: 1.55; font-weight: 600; }
.duration { font-size: 12px; font-weight: 950; }
.impact {
  color: #fff;
  background:
    linear-gradient(90deg, rgba(10,27,12,.97), rgba(19,47,26,.88)),
    url("https://images.unsplash.com/photo-1448375240586-882707db888b?auto=format&fit=crop&w=2400&q=90") center / cover no-repeat;
}
.concept-ocean .impact {
  color: var(--gsa-ink);
  background:
    linear-gradient(90deg, rgba(255,249,239,.98), rgba(255,249,239,.88)),
    url("https://images.unsplash.com/photo-1519046904884-53103b34b206?auto=format&fit=crop&w=2400&q=90") center / cover no-repeat;
}
.split { display: grid; grid-template-columns: .78fr 1.12fr; gap: 70px; align-items: center; }
.split-copy h2 { color: #fff; text-align: left; }
.concept-ocean .split-copy h2 { color: var(--gsa-green); }
.split-copy p { max-width: 590px; margin: 0 0 18px; line-height: 1.7; font-weight: 650; opacity: .93; }
.checks { list-style: none; padding: 0; margin: 28px 0; }
.checks li { margin: 12px 0; font-weight: 800; }
.checks li::before { content: "✓"; color: var(--theme-warm); margin-right: 10px; font-weight: 950; }
.polaroids { height: 390px; position: relative; }
.polaroid {
  position: absolute;
  width: 32%;
  min-width: 190px;
  background: #fff;
  padding: 10px 10px 42px;
  box-shadow: 0 26px 70px rgba(0,0,0,.25);
}
.polaroid::before {
  content: "";
  position: absolute;
  top: -13px;
  left: 50%;
  width: 80px;
  height: 24px;
  transform: translateX(-50%) rotate(-4deg);
  background: rgba(245,234,214,.72);
  box-shadow: 0 8px 18px rgba(0,0,0,.12);
}
.polaroid img { width: 100%; height: 250px; object-fit: cover; }
.polaroid.one { left: 4%; top: 70px; transform: rotate(-5deg); }
.polaroid.two { left: 34%; top: 30px; transform: rotate(4deg); z-index: 2; }
.polaroid.three { right: 4%; top: 84px; transform: rotate(7deg); }
.destination-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.destination {
  min-height: 250px;
  padding: 21px;
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  color: #fff;
  background: var(--dest-image) center / cover no-repeat;
  box-shadow: var(--shadow-soft);
  transition: .3s ease;
}
.destination:hover { transform: translateY(-8px); box-shadow: var(--shadow-strong); }
.destination::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,.02), rgba(0,0,0,.83)); }
.destination > * { position: relative; z-index: 1; }
.destination h3 { margin: 0 0 7px; font-size: 21px; line-height: 1.05; }
.destination p { margin: 0 0 12px; color: rgba(255,255,255,.87); font-size: 13px; line-height: 1.45; }
.stories { display: grid; grid-template-columns: .72fr 1.28fr; gap: 52px; align-items: center; }
.stories .section-head { text-align: left; margin: 0; }
.quote {
  position: relative;
  background: #fff;
  border-radius: 15px;
  padding: 36px 42px 36px 86px;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(15,23,42,.07);
  font-size: 17px;
  line-height: 1.7;
  font-weight: 650;
}
.quote::before {
  content: "“";
  position: absolute;
  left: 34px;
  top: 18px;
  font-size: 74px;
  line-height: 1;
  color: rgba(83,100,47,.22);
  font-family: Georgia, serif;
}
.concept-ocean .quote::before { color: rgba(243,112,33,.25); }
.quote strong { display: block; margin-top: 14px; font-size: 13px; color: var(--theme-accent); }
.cta {
  min-height: 360px;
  padding: 82px 52px;
  display: grid;
  place-items: center;
  text-align: center;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(0,121,139,.78), rgba(21,39,20,.46)),
    url("https://images.unsplash.com/photo-1500530855697-b586d89ba3ee?auto=format&fit=crop&w=2400&q=90") center / cover no-repeat;
}
.concept-ocean .cta {
  background:
    linear-gradient(90deg, rgba(243,112,33,.93), rgba(0,125,145,.42)),
    url("https://images.unsplash.com/photo-1519046904884-53103b34b206?auto=format&fit=crop&w=2400&q=90") center / cover no-repeat;
}
.cta h2 { color: #fff; text-shadow: 0 14px 38px rgba(0,0,0,.28); }
.cta p { max-width: 720px; margin: 0 auto 26px; line-height: 1.7; font-weight: 650; }
.cta .hero-buttons { justify-content: center; }
.footer { background: var(--gsa-green-deep); color: #fff; padding: 62px 52px 24px; }
.concept-ocean .footer { background: #052b35; }
.footer-grid { width: min(1420px, 100%); margin: 0 auto; display: grid; grid-template-columns: 1.35fr repeat(4, 1fr); gap: 42px; }
.footer .logo { width: 210px; margin-bottom: 16px; }
.footer p { color: rgba(255,255,255,.72); line-height: 1.65; font-size: 14px; }
.footer h4 { margin: 0 0 14px; font-size: 15px; }
.footer a { display: block; margin: 9px 0; color: rgba(255,255,255,.70); font-size: 13px; }
.copyright { width: min(1420px, 100%); margin: 42px auto 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.55); font-size: 12px; }
.concept-island {
  --theme-accent: var(--gsa-lime);
  --theme-heading: var(--gsa-green);
  --theme-warm: var(--gsa-yellow);
  --hero-image: url("https://images.unsplash.com/photo-1507525428034-b723cf961d3e?auto=format&fit=crop&w=2400&q=90");
}
.concept-ocean {
  --theme-accent: var(--gsa-orange);
  --theme-heading: var(--gsa-orange);
  --theme-warm: var(--gsa-orange);
  --hero-image: url("https://images.unsplash.com/photo-1544551763-46a013bb70d5?auto=format&fit=crop&w=2400&q=90");
}
@media (max-width: 1120px) {
  .header { padding: 0 24px; }
  .nav { display: none; }
  .logo { width: 190px; }
  .hero { padding: 120px 24px 140px; }
  .hero-inner, .feature-bar, .audience-grid, .program-grid, .split, .destination-grid, .stories, .footer-grid { grid-template-columns: 1fr; }
  .floating-panel { justify-self: start; transform: none; max-width: 520px; }
  .feature-bar { width: calc(100% - 32px); }
  .feature { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.12); }
  .section { padding: 78px 24px; }
  .program-card img { height: 245px; }
  .polaroids { height: auto; display: grid; grid-template-columns: 1fr; gap: 18px; }
  .polaroid, .polaroid.one, .polaroid.two, .polaroid.three { position: relative; left: auto; right: auto; top: auto; width: 100%; transform: none; }
  .polaroid img { height: 260px; }
  .footer { padding: 56px 24px 24px; }
}
@media (max-width: 620px) {
  .header { height: 78px; }
  .logo { width: 160px; }
  .actions .btn-outline { display: none; }
  .hero h1 { font-size: 62px; }
  .hero p { font-size: 16px; }
  .btn { width: 100%; }
  .hero-buttons { width: 100%; }
  .floating-panel img { height: 240px; }
  .feature { grid-template-columns: 44px 1fr; padding: 22px; }
  .feature-icon { width: 44px; height: 44px; }
  .audience-card { min-height: 300px; }
  .section-head h2, .split-copy h2, .cta h2 { font-size: 42px; }
  .quote { padding: 32px 26px 30px 62px; }
  .page-switch { left: 14px; right: 14px; justify-content: center; }
}

/* V5: three-page switcher + blue/yellow draft concept */
.page-switch.three a:nth-child(1){background:#4f642f;}
.page-switch.three a:nth-child(2){background:#f37021;}
.page-switch.three a:nth-child(3){background:#f7c600;color:#06233b;}
.concept-blue{
  --theme-accent:#f7c600;--theme-heading:#0b3553;--theme-warm:#f7c600;
  --hero-image:url("https://images.unsplash.com/photo-1510414842594-a61c69b5ae57?auto=format&fit=crop&w=2400&q=90");
  background:#fff;
}
.concept-blue .header.dark-logo-area{background:linear-gradient(180deg,rgba(2,28,49,.72),rgba(2,28,49,.16));}
.concept-blue .hero{
  min-height:850px;padding-top:138px;
  background:radial-gradient(circle at 80% 25%,rgba(255,255,255,.22),transparent 25%),
  linear-gradient(90deg,rgba(2,25,43,.88),rgba(4,55,78,.42) 48%,rgba(0,0,0,.08)),
  var(--hero-image) center/cover no-repeat;
}
.concept-blue .accent{color:#f7c600;}
.concept-blue .feature-bar{background:rgba(5,34,54,.96);color:#fff;border-radius:0;}
.concept-blue .feature-icon{color:#f7c600;}
.concept-blue .section-head h2,.concept-blue .split-copy h2,.concept-blue .cta h2{color:#0b3553;}
.concept-blue .section-head h2::after{content:"";display:block;width:82px;height:5px;border-radius:20px;background:#00b8b8;margin:16px auto 0;}
.concept-blue .tag{color:#00a6a6;}
.concept-blue .impact{background:linear-gradient(90deg,rgba(0,78,85,.94),rgba(4,91,96,.78)),url("https://images.unsplash.com/photo-1544551763-46a013bb70d5?auto=format&fit=crop&w=2400&q=90") center/cover no-repeat;color:#fff;}
.concept-blue .impact .split-copy h2{color:#fff;}
.concept-blue .destination::before,.concept-blue .audience-card::before{background:linear-gradient(180deg,rgba(0,0,0,.02),rgba(4,25,44,.86));}
.concept-blue .cta{background:linear-gradient(90deg,rgba(0,180,185,.78),rgba(2,35,59,.52)),url("https://images.unsplash.com/photo-1507525428034-b723cf961d3e?auto=format&fit=crop&w=2400&q=90") center/cover no-repeat;}
.concept-blue .footer{background:#06233b;}
.concept-blue .learn{color:#f7c600;}