* { box-sizing: border-box; }
  :root {
    --bg: #f0f9ff;
    --ink: #0b1220;
    --muted: #4a5568;
    --brand: #0077ff;
    --brand-dark: #005fcc;
    --card: #ffffff;
    --shadow: 0 8px 24px rgba(0,0,0,0.12);
    --radius: 16px;
  }
  html, body { height: 100%; }
  body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, 'Apple Color Emoji', 'Segoe UI Emoji';
    background: var(--bg);
    color: var(--ink);
  }
  
  .hero {
    height: 52vh;
    min-height: 320px;
    background: url('/public/dolphin_seals_banner_1500x500.jpg') center/cover no-repeat;
    display: grid;
    place-items: center;
    text-align: center;
    position: relative;
  }
  .hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.35), rgba(0,0,0,0.25));
  }
  .hero-inner {
    position: relative;
    z-index: 1;
    color: white;
    text-shadow: 0 2px 12px rgba(0,0,0,0.8);
  }
  .hero h1 { font-size: clamp(2rem, 6vw, 4rem); margin: 0; }
  .tagline { margin: 8px 0 20px; font-size: 1.2rem; opacity: .95; }
  
  .btn {
    display: inline-block;
    padding: 14px 22px;
    border-radius: 12px;
    background: rgba(255,255,255,0.9);
    color: var(--ink);
    text-decoration: none;
    margin: 0 8px;
    box-shadow: var(--shadow);
    transition: transform .1s ease, background .2s ease;
  }
  .btn:hover { transform: translateY(-2px); background: #fff; }
  .btn.primary { background: var(--brand); color: #fff; }
  .btn.primary:hover { background: var(--brand-dark); }
  
  main { max-width: 1100px; margin: 0 auto; padding: 32px 16px 64px; }
  
  .traits h2, .video h2 { text-align: center; margin: 0 0 16px; }
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
  }
  .card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 14px;
    text-align: center;
  }
  .card img {
    width: 100%;
    border-radius: 12px;
  }
  .card h3 { margin: 12px 0 6px; }
  .card p { margin: 0; color: var(--muted); }
  
  .video-frame {
    margin: 12px auto 0;
    max-width: 960px;
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
  }
  video { width: 100%; height: auto; display: block; }
  .hint { text-align: center; color: var(--muted); margin-top: 8px; }
  
  footer {
    padding: 24px;
    text-align: center;
    color: var(--muted);
  }
  footer nav { display: inline-flex; gap: 10px; align-items: center; margin-bottom: 6px; }
  
  /* helpers */
  .stack { max-width: 900px; margin: 40px auto; padding: 0 12px; line-height: 1.6; }
  .traits-list { list-style: disc; margin-left: 1.5rem; }
  
  /* XO spacing & hover polish */
  .traits { margin-bottom: 32px; }
  .video  { margin-top: 32px; }
  .card { transition: transform .12s ease, box-shadow .12s ease; }
  .card:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0,0,0,.16); }