:root {
  color-scheme: dark;
  --bg: #07131f;
  --bg-soft: #10253a;
  --panel: rgba(255, 255, 255, 0.08);
  --panel-strong: rgba(255, 255, 255, 0.14);
  --text: #f4fbff;
  --muted: #9ac6d8;
  --accent: #46d2b1;
  --accent-2: #4ba7ff;
  --accent-3: #ff8d6a;
  --border: rgba(255, 255, 255, 0.18);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(70, 210, 177, 0.18), transparent 18%),
    linear-gradient(135deg, var(--bg) 0%, #0d2334 60%, #091722 100%);
  min-height: 100vh;
}

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

.site-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.2rem 0 3rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.3rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  box-shadow: inset 0 1px 1px rgba(255,255,255,0.35);
}

.nav-links {
  display: flex;
  gap: 1.25rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  transition: color 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
  padding: 2rem 0 3rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 0.76rem;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.7rem);
  line-height: 1.05;
  margin: 0 0 1rem;
}

.hero-text,
.info-card p,
.project-panel p,
.footer p,
.reefonauts-card p,
.hero-highlights {
  color: var(--muted);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin: 1.4rem 0 1.2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  padding: 0.8rem 1.15rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  color: #04202c;
  background: linear-gradient(135deg, var(--accent), #87f3d8);
  box-shadow: 0 10px 24px rgba(70, 210, 177, 0.25);
}

.btn-secondary {
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--border);
}

.hero-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.2rem;
  padding: 0;
  list-style: none;
  margin: 0;
}

.hero-highlights li {
  position: relative;
  padding-left: 0.95rem;
  color: var(--muted);
}

.hero-highlights li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.hero-visual {
  position: relative;
  padding: 1.25rem;
  border-radius: 2rem;
  background: linear-gradient(145deg, rgba(255,255,255,0.16), rgba(255,255,255,0.06));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  min-height: 420px;
  isolation: isolate;
}

.water-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.95;
}

.hero-visual > *:not(.water-canvas) {
  position: relative;
  z-index: 1;
}

.hero-scene {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.hero-scene canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
  border: none;
  outline: none;
  background: transparent;
}

.project-media {
  margin-bottom: 1rem;
  border-radius: 1rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: linear-gradient(135deg, rgba(70, 210, 177, 0.16), rgba(75, 167, 255, 0.16));
}

.project-media img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: center;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 0 2.5rem;
}

.stats article {
  padding: 1.2rem;
  border-radius: 1.1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
}

.stats strong {
  display: block;
  font-size: 1.6rem;
  margin-bottom: 0.35rem;
}

.stats span {
  color: var(--muted);
}

.section {
  padding: 1rem 0 2rem;
}

.section-heading {
  margin-bottom: 1rem;
}

.section-heading h2,
.reefonauts-card h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  margin: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.info-card,
.project-panel {
  padding: 1.2rem;
  border-radius: 1.3rem;
  background: var(--panel);
  border: 1px solid var(--border);
}

.reefonauts {
  padding-top: 1.5rem;
}

.reefonauts-card {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1rem;
  padding: 1.4rem;
  border-radius: 1.6rem;
  background: linear-gradient(135deg, rgba(75, 167, 255, 0.16), rgba(70, 210, 177, 0.12));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.feature-list {
  padding-left: 1rem;
  color: var(--muted);
  line-height: 1.8;
}

.pill {
  display: inline-flex;
  padding: 0.45rem 0.7rem;
  margin-bottom: 0.8rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.15);
  color: #dffbff;
  font-size: 0.82rem;
  font-weight: 600;
}

.value-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.value-strip div {
  padding: 0.85rem 1rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: #dffbff;
}

.footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 860px) {
  .hero,
  .reefonauts-card,
  .card-grid,
  .stats {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 1.2rem;
    padding: 1.2rem 0 2rem;
  }

  .hero-visual {
    min-height: 260px;
    padding: 0.9rem;
  }

  .reefonauts-card {
    padding: 1.1rem;
  }
}

@media (max-width: 640px) {
  .site-shell {
    width: min(100% - 1rem, 100%);
    padding: 0.8rem 0 2rem;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.4rem 0 1rem;
  }

  .nav-links {
    gap: 0.8rem;
  }

  .hero {
    padding-top: 0.4rem;
  }

  .hero h1 {
    font-size: 2rem;
    line-height: 1.12;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .hero-highlights {
    gap: 0.35rem 0.8rem;
    font-size: 0.95rem;
  }

  .stats {
    gap: 0.75rem;
    margin-bottom: 1.5rem;
  }

  .stats article,
  .info-card,
  .project-panel,
  .reefonauts-card {
    padding: 1rem;
  }

  .section {
    padding: 0.4rem 0 1.2rem;
  }

  .footer {
    flex-direction: column;
    margin-top: 1.2rem;
  }
}