/* Filtration — clean tech: soft blue / white */
:root {
  --bg: #f4f9fc;
  --surface: #ffffff;
  --ink: #0c2740;
  --muted: #4a667a;
  --blue: #2b8fd9;
  --blue-soft: #7ec8f0;
  --blue-deep: #1565a8;
  --accent: #2b8fd9;
  --border: #d7e8f3;
  --photo-a: #2b8fd9;
  --photo-b: #7ec8f0;
  --photo-c: #1565a8;
  --photo-d: #a8d8f0;
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; color: var(--ink); background: var(--bg); line-height: 1.55; }
a { color: var(--blue-deep); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; }
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(244, 249, 252, 0.94); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; min-height: 3.5rem; gap: 1rem; position: relative; }
.logo { font-weight: 800; text-decoration: none; color: var(--ink); letter-spacing: -0.02em; }
.logo span { color: var(--blue); }
.nav-links { display: flex; gap: 1.25rem; list-style: none; margin: 0; padding: 0; align-items: center; }
.nav-links a { text-decoration: none; color: var(--muted); font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover { color: var(--blue-deep); }
.nav-cta { background: var(--blue); color: #fff !important; padding: 0.45rem 0.9rem; border-radius: 999px; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 8px; padding: 0.35rem 0.6rem; font-size: 1.1rem; cursor: pointer; }
.hero { padding: 3.5rem 0 2.5rem; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 2rem; align-items: center; }
.subhead { color: var(--muted); font-size: 1rem; margin: 0 0 0.75rem; }
.hero h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.15; margin: 0 0 0.75rem; letter-spacing: -0.03em; }
.hero-lead { color: var(--muted); font-size: 1.1rem; margin: 0 0 1.5rem; max-width: 32rem; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 700; padding: 0.75rem 1.25rem;
  border-radius: 999px; background: var(--blue); color: #fff;
}
.btn:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; color: var(--blue-deep); border: 2px solid var(--blue); margin-left: 0.5rem; }
.photo {
  display: flex; align-items: center; justify-content: center; text-align: center;
  border-radius: 16px; color: #fff; font-weight: 700; font-size: 0.95rem; letter-spacing: 0.02em;
  min-height: 220px; padding: 1.5rem; text-shadow: 0 1px 2px rgba(0,0,0,0.25);
}
.photo-lg { min-height: 320px; }
.section { padding: 3rem 0; }
.section h2 { font-size: 1.75rem; margin: 0 0 0.5rem; letter-spacing: -0.02em; }
.section-intro { color: var(--muted); margin: 0 0 1.5rem; max-width: 36rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
}
.card .body { padding: 1rem 1.15rem 1.25rem; }
.card h3 { margin: 0 0 0.35rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.cta-band {
  margin: 1rem 0 3rem; padding: 2.25rem; border-radius: 18px;
  background: linear-gradient(120deg, #e3f2fb, #f0f9ff);
  text-align: center;
}
.cta-band h2 { margin: 0 0 0.5rem; }
.cta-band p { margin: 0 0 1.25rem; color: var(--muted); }
.footer {
  background: #0c2740; color: #a8d8f0; padding: 2rem 0; font-size: 0.9rem;
}
.footer strong { color: #fff; }
.footer a { color: #7ec8f0; }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
.nav-links a.active,
.nav-links a[aria-current="page"] {
  color: var(--ink); font-weight: 700;
}
.page-header {
  padding: 2.5rem 0 1.25rem;
  border-bottom: 1px solid var(--border);
}
.page-header h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  letter-spacing: -0.02em; line-height: 1.2;
}
.page-header .lede {
  margin: 0; max-width: 36rem; color: var(--muted); font-size: 1.05rem;
}
.stub { color: var(--muted); font-size: 0.95rem; }
.stub::before {
  content: "STUB: "; font-weight: 700; font-size: 0.75rem;
  letter-spacing: 0.04em; opacity: 0.7;
}
.teaser-links {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem; margin-top: 1.5rem;
}
.teaser-links a {
  display: block; text-decoration: none; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px;
  padding: 1rem 1.15rem; color: inherit; font-weight: 600;
}
.teaser-links a:hover { border-color: currentColor; }
.teaser-links a span {
  display: block; font-weight: 400; color: var(--muted);
  font-size: 0.9rem; margin-top: 0.25rem;
}
.contact-form {
  max-width: 32rem; display: grid; gap: 0.85rem; margin-top: 1.25rem;
}
.contact-form label {
  display: grid; gap: 0.35rem; font-weight: 600; font-size: 0.9rem;
}
.contact-form input,
.contact-form textarea {
  font: inherit; padding: 0.65rem 0.75rem;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: inherit;
}
.contact-form textarea { min-height: 7rem; resize: vertical; }
.contact-form .btn[disabled],
.contact-form button[disabled] { opacity: 0.65; cursor: not-allowed; }
@media (max-width: 800px) {
  .nav-toggle { display: inline-block; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; background: #fff; padding: 1rem;
    border-bottom: 1px solid var(--border); align-items: stretch;
  }
  .nav-links.open { display: flex; }
  .btn-ghost { margin-left: 0; margin-top: 0.5rem; display: inline-block; }
  .hero-grid, .grid-2, .grid-3 { grid-template-columns: 1fr; }
}