:root {
  --navy: #0b2545;
  --ocean: #13315c;
  --sea: #1b6ca8;
  --teal: #1b98e0;
  --aqua: #8ecae6;
  --foam: #eef5fb;
  --sand: #ffb703;
  --ink: #1f2933;
  --muted: #5b6b7b;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(11, 37, 69, 0.12);
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
}
a { color: var(--sea); text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 0.5em; color: var(--navy); }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0 0 1em; }

.container { width: min(1120px, 92%); margin: 0 auto; }
.section { padding: 5rem 0; }
.section.alt { background: var(--foam); }
.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.75rem;
}
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--teal); color: var(--white); box-shadow: 0 6px 18px rgba(27, 152, 224, 0.35); }
.btn-primary:hover { background: var(--sea); }
.btn-outline { border-color: var(--white); color: var(--white); }
.btn-outline:hover { background: rgba(255, 255, 255, 0.12); }
.btn-dark { background: var(--navy); color: var(--white); }
.btn-dark:hover { background: var(--ocean); }

/* Navegação */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11, 37, 69, 0.92);
  backdrop-filter: blur(10px);
  color: var(--white);
}
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 0.6rem; color: var(--white); font-weight: 800; font-size: 1.2rem; letter-spacing: -0.01em; }
.brand svg { width: 34px; height: 34px; }
.nav-links { display: flex; gap: 1.6rem; align-items: center; }
.nav-links a { color: rgba(255, 255, 255, 0.85); font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover { color: var(--white); }
.nav-links .btn { padding: 0.55rem 1.1rem; }
.nav-toggle { display: none; background: none; border: 0; color: var(--white); font-size: 1.6rem; cursor: pointer; }

/* Hero */
.hero {
  position: relative;
  background: radial-gradient(1200px 600px at 80% -10%, #1b6ca8 0%, var(--ocean) 45%, var(--navy) 100%);
  color: var(--white);
  overflow: hidden;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 6rem 0 8rem;
}
.hero h1 { color: var(--white); }
.hero .lead { color: rgba(255, 255, 255, 0.82); }
.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; margin-top: 1.6rem; }
.hero-art { position: relative; }
.hero-art svg { width: 100%; height: auto; filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.35)); }
.hero-wave { position: absolute; left: 0; right: 0; bottom: -1px; width: 100%; height: 90px; display: block; }
.hero-wave path { fill: var(--white); }
.bubble {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  animation: rise 14s linear infinite;
}
@keyframes rise {
  from { transform: translateY(0) scale(1); opacity: 0.9; }
  to { transform: translateY(-140vh) scale(1.4); opacity: 0; }
}

/* Cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid rgba(11, 37, 69, 0.06);
}
.card .icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--teal), var(--sea));
  display: grid;
  place-items: center;
  margin-bottom: 1.2rem;
  color: var(--white);
}
.card p { color: var(--muted); margin: 0; }

/* Sobre */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: center; }
.split ul { padding-left: 1.2rem; color: var(--muted); }
.split li { margin-bottom: 0.4rem; }
.split li strong { color: var(--ink); }
.photo-frame {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  aspect-ratio: 4 / 3;
  background: linear-gradient(160deg, #0b2545, #1b6ca8 60%, #8ecae6);
  display: grid;
  place-items: center;
}
.photo-frame svg { width: 70%; }

/* Números */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; text-align: center; }
.stat { padding: 1.5rem 1rem; }
.stat .n { font-size: 2.6rem; font-weight: 800; color: var(--teal); line-height: 1; }
.stat .l { color: var(--muted); margin-top: 0.4rem; font-weight: 500; }

/* Espécies */
.species { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.2rem; }
.species .card { padding: 1.4rem; }
.species em { display: block; color: var(--teal); font-style: italic; font-size: 0.9rem; margin-bottom: 0.4rem; }
.tag { display: inline-block; background: var(--foam); color: var(--sea); font-size: 0.75rem; padding: 0.2rem 0.6rem; border-radius: 999px; font-weight: 600; }

/* CTA */
.cta {
  background: linear-gradient(135deg, var(--navy), var(--sea));
  color: var(--white);
  border-radius: 24px;
  padding: 3.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}
.cta h2 { color: var(--white); }
.cta p { color: rgba(255, 255, 255, 0.82); margin: 0; }

/* Contato */
.contact { display: grid; grid-template-columns: 1fr; gap: 3rem; }
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { display: flex; gap: 0.8rem; align-items: flex-start; margin-bottom: 1rem; color: var(--muted); }
.contact-list svg { flex: 0 0 22px; color: var(--teal); margin-top: 3px; }
.form { display: grid; gap: 0.9rem; }
.form label { font-weight: 600; font-size: 0.9rem; display: grid; gap: 0.3rem; }
.form input, .form textarea {
  font: inherit;
  padding: 0.75rem 0.9rem;
  border: 1.5px solid #d3dde7;
  border-radius: 10px;
  background: var(--white);
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px rgba(27, 152, 224, 0.2); }

/* Rodapé */
.footer { background: var(--navy); color: rgba(255, 255, 255, 0.7); padding: 2.5rem 0; font-size: 0.9rem; }
.footer .container { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.footer a { color: var(--aqua); }

@media (max-width: 860px) {
  .hero .container { grid-template-columns: 1fr; padding: 4rem 0 7rem; }
  .hero-art { order: -1; max-width: 360px; margin: 0 auto; }
  .grid-3, .split { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .cta { flex-direction: column; align-items: flex-start; padding: 2.2rem; }
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--navy);
    flex-direction: column;
    padding: 1.2rem 4%;
    align-items: flex-start;
  }
  .nav-links.open { display: flex; }
}