:root {
  color-scheme: dark;
  --bg: #02070d;
  --surface: #071522;
  --surface-2: #0b2032;
  --text: #f5f9ff;
  --muted: #9cb5c9;
  --accent: #00a8ff;
  --border: rgba(0, 168, 255, 0.28);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 8%, rgba(0, 168, 255, 0.16), transparent 28rem),
    linear-gradient(180deg, #071623 0%, var(--bg) 42%);
  color: var(--text);
  line-height: 1.65;
}

a { color: var(--accent); }
header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem clamp(1rem, 4vw, 3rem);
  background: rgba(1, 7, 12, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
}
header strong { letter-spacing: 0.04em; }
header nav { display: flex; flex-wrap: wrap; gap: 0.8rem; font-size: 0.82rem; }
header nav a { color: var(--muted); text-decoration: none; }
header nav a:hover { color: var(--accent); }
main { width: min(960px, calc(100% - 2rem)); margin: 0 auto; padding: 3rem 0 5rem; }
.eyebrow { color: var(--accent); font-weight: 800; letter-spacing: 0.14em; font-size: 0.78rem; }
h1 { font-size: clamp(2.2rem, 6vw, 4.8rem); line-height: 0.98; margin: 0.55rem 0 1rem; }
h2 { margin-top: 2.7rem; font-size: clamp(1.45rem, 3vw, 2rem); }
h3 { margin-top: 1.8rem; }
.summary {
  margin: 1.5rem 0 2rem;
  padding: 1.2rem 1.35rem;
  background: rgba(7, 21, 34, 0.9);
  border: 1px solid var(--border);
}
.meta { color: var(--muted); font-size: 0.9rem; }
p, li { color: #d7e5f0; }
li + li { margin-top: 0.35rem; }
.notice {
  padding: 1rem 1.2rem;
  border-left: 4px solid var(--accent);
  background: rgba(0, 168, 255, 0.08);
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}
.contact-grid div {
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
}
footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem clamp(1rem, 4vw, 3rem) 3rem;
  color: var(--muted);
  font-size: 0.82rem;
}
.button {
  display: inline-flex;
  padding: 0.8rem 1rem;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #00111c;
  text-decoration: none;
  font-weight: 800;
}
.button.secondary { background: transparent; color: var(--accent); }
@media (max-width: 700px) {
  header { align-items: flex-start; flex-direction: column; }
  .contact-grid { grid-template-columns: 1fr; }
  main { padding-top: 2rem; }
}