:root {
  color-scheme: dark;
  --ink: #eef7f5;
  --muted: #9eb8b8;
  --soft: rgba(238, 247, 245, .68);
  --line: rgba(216, 245, 255, .13);
  --panel: rgba(11, 28, 32, .66);
  --blue: #7fd7e8;
  --gold: #e2c16d;
  --bg: #061114;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 76% 12%, rgba(126, 215, 232, .14), transparent 33rem),
    radial-gradient(circle at 18% 86%, rgba(226, 193, 109, .08), transparent 29rem),
    linear-gradient(145deg, #061114 0%, #092329 48%, #061114 100%);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(216, 245, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(216, 245, 255, .028) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .78), transparent 82%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .78), transparent 82%);
}

.page-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 76px 0 44px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(320px, 1.1fr);
  align-items: center;
  min-height: calc(100vh - 180px);
  gap: 48px;
}

.hero-copy {
  max-width: 590px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--gold);
  font-size: .78rem;
  font-weight: 650;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(5rem, 13vw, 11rem);
  font-weight: 520;
  line-height: .82;
}

.lead {
  max-width: 36rem;
  margin-bottom: 0;
  color: var(--soft);
  font-size: clamp(1.12rem, 2vw, 1.45rem);
  line-height: 1.65;
}

.delta-map {
  position: relative;
  min-height: 360px;
  border: 1px solid var(--line);
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(127, 215, 232, .12), transparent 38%),
    linear-gradient(225deg, rgba(226, 193, 109, .08), transparent 44%),
    rgba(5, 18, 22, .48);
  box-shadow: 0 32px 90px rgba(0, 0, 0, .28);
}

.delta-map::before {
  position: absolute;
  inset: 18px;
  content: "";
  border: 1px solid rgba(216, 245, 255, .08);
}

.delta-map svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.delta-map .land {
  fill: url("#coast");
}

.delta-map path,
.delta-map circle {
  vector-effect: non-scaling-stroke;
}

.main-river,
.river-line {
  fill: none;
  stroke: url("#river");
  stroke-linecap: round;
  stroke-linejoin: round;
}

.main-river {
  stroke-width: 3;
}

.river-line {
  stroke-width: 1.4;
  opacity: .74;
}

.river-line.faint {
  opacity: .32;
}

.delta-map circle {
  fill: #d8f5ff;
  opacity: .82;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 10px;
}

.principles article {
  min-height: 196px;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(18px);
}

.principles span {
  display: block;
  margin-bottom: 42px;
  color: var(--gold);
  font-size: .75rem;
  letter-spacing: .14em;
}

.principles h2 {
  margin-bottom: 12px;
  font-size: 1.25rem;
  font-weight: 560;
}

.principles p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.62;
}

footer {
  display: flex;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 34px;
  border-top: 1px solid var(--line);
  color: rgba(238, 247, 245, .56);
  font-size: .86rem;
}

footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .page-shell {
    padding-top: 48px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 34px;
  }

  .delta-map {
    min-height: 330px;
  }

  .principles {
    grid-template-columns: 1fr;
    margin-top: 28px;
  }

  .principles article {
    min-height: 0;
  }

  .principles span {
    margin-bottom: 28px;
  }
}

@media (max-width: 560px) {
  .page-shell,
  footer {
    width: min(100% - 28px, 1120px);
  }

  .page-shell {
    padding-top: 34px;
  }

  h1 {
    font-size: clamp(4.2rem, 24vw, 6.6rem);
  }

  .lead {
    font-size: 1.04rem;
  }

  .delta-map {
    min-height: 260px;
  }

  .delta-map::before {
    inset: 12px;
  }

  .principles article {
    padding: 20px;
  }
}