:root {
  --navy: #0b3d5b;
  --teal: #2d7f8e;
  --aqua: #7fc6d4;
  --sand: #f4efea;
  --text: #1f2f3d;
  --soft: #5f7c89;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--sand);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  min-height: 90vh;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(11,61,91,0.95) 0%, rgba(15,82,106,0.8) 100%);
  color: var(--white);
}

.hero-content {
  max-width: 760px;
  padding: 4rem 1.5rem 6rem;
  text-align: center;
  z-index: 1;
}

.hero-content h1 {
  font-size: clamp(3rem, 6vw, 5rem);
  margin: 0.5rem 0 1rem;
  letter-spacing: -0.04em;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  color: #d3f1ff;
}

.subhead {
  font-size: 1.125rem;
  max-width: 42rem;
  margin: 0 auto 2rem;
  color: #e8f6fb;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 1.8rem;
  border-radius: 999px;
  background: var(--aqua);
  color: var(--navy);
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(16, 74, 99, 0.16);
}

.hero-image {
  position: absolute;
  inset: 0;
  background-image: url('assets/hero-river.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.28;
}

.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 20%, rgba(255,255,255,0.18), transparent 35%);
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.intro-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: -3rem;
}

.intro-copy {
  padding: 3rem;
  border-radius: 28px;
  background: var(--white);
  box-shadow: 0 24px 70px rgba(17, 46, 62, 0.12);
}

.intro-copy h2 {
  margin-top: 0;
  font-size: clamp(2rem, 3vw, 2.8rem);
}

.intro-copy p {
  color: var(--soft);
  margin: 1rem 0 0;
}

.intro-cards {
  display: grid;
  gap: 1.5rem;
}

.card {
  background: var(--white);
  padding: 2rem;
  border-radius: 24px;
  border: 1px solid rgba(13, 54, 80, 0.08);
}

.card h3 {
  margin-top: 0;
}

.river-gallery {
  display: grid;
  gap: 2rem;
  align-items: center;
  margin: 4rem 0;
}

.gallery-text {
  display: grid;
  gap: 1rem;
}

.gallery-text h2 {
  font-size: clamp(2rem, 3vw, 3rem);
}

.gallery-text p {
  color: var(--soft);
  max-width: 44rem;
}

.gallery-images {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.partner-bio {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
  padding: 3rem;
  background: #f8fbfc;
  border-radius: 28px;
}

.bio-image img {
  border-radius: 28px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.bio-copy h2 {
  margin-top: 0;
}

.bio-copy p {
  color: var(--soft);
}

.contact-panel {
  display: grid;
  gap: 2rem;
  padding: 3rem;
  margin-top: 4rem;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(45,127,142,0.08), rgba(255,255,255,0.95));
  border: 1px solid rgba(45,127,142,0.15);
}

.contact-details {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.contact-details h3 {
  margin-bottom: 0.5rem;
}

.address, address {
  font-style: normal;
}

.site-footer {
  text-align: center;
  color: var(--soft);
  padding: 2rem 1.5rem;
}

@media (min-width: 768px) {
  .intro-panel {
    grid-template-columns: 1.4fr 1fr;
  }

  .gallery-images {
    grid-template-columns: 1fr 1fr;
  }

  .partner-bio {
    grid-template-columns: 1fr 1.2fr;
  }

  .contact-details {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .hero-content {
    padding: 3rem 1rem 4rem;
  }

  .gallery-images {
    grid-template-columns: 1fr;
  }

  .contact-details {
    grid-template-columns: 1fr;
  }
}