:root {
  --navy: #1a2233;
  --navy-2: #232d42;
  --accent: #37b24d;
  --accent-dark: #2f9d43;
  --text: #1b2130;
  --muted: #5a6478;
  --bg: #f5f6f8;
  --card: #ffffff;
  --border: #e2e5ea;
  --gutter: 1.5rem;
  --card-pad: 1.75rem;
  --max: 860px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #e6e9ef;
    --muted: #9aa4b8;
    --bg: #0f131c;
    --card: #1a2233;
    --border: #2a3446;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

/* --- Top navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--navy);
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.nav .brand {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: #fff;
  text-decoration: none;
}
.nav .brand .accent { color: var(--accent); }
.nav .brand .sub { color: #c3cbdb; font-weight: 400; }
.nav .links { display: flex; gap: 1.25rem; }
.nav .links a {
  color: #c3cbdb;
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}
.nav .links a:hover { color: #fff; }
.nav .links a.active { color: #fff; border-bottom-color: var(--accent); }

/* --- Hero --- */
.hero {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #fff;
  padding: 3.5rem 0 3rem;
}
.hero h1 { margin: 0; font-size: 2.4rem; letter-spacing: -0.03em; line-height: 1.15; }
.hero h1 .accent { color: var(--accent); }
.hero h1 .sub { color: #c3cbdb; font-weight: 400; }
.hero .tagline { margin: 0.9rem 0 0; color: #c3cbdb; font-size: 1.1rem; max-width: 46ch; }
.hero .badge {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.25rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(55, 178, 77, 0.14);
  border: 1px solid rgba(55, 178, 77, 0.35);
  border-radius: 999px;
}
.cta { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.75rem; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 1.2rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #08210f; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.25); }
.btn-ghost:hover { border-color: #fff; }

/* --- Sections --- */
main { padding: 2.75rem 0 1rem; }
.section-title { font-size: 1.35rem; letter-spacing: -0.01em; margin: 0 0 1.25rem; }
.callout {
  background: rgba(55, 178, 77, 0.10);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin: 0 0 2.5rem;
}
.callout strong { font-weight: 650; }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin-bottom: 2.75rem;
}
.feature {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.3rem 1.4rem;
}
.feature h3 { margin: 0 0 0.5rem; font-size: 1.05rem; }
.feature p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.feature .ico { font-size: 1.4rem; line-height: 1; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Article (privacy) --- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: var(--card-pad);
  box-shadow: 0 6px 24px rgba(16, 22, 34, 0.06);
}
.card h2 {
  font-size: 1.2rem;
  margin: 1.75rem 0 0.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.card h2:first-of-type { border-top: none; padding-top: 0; margin-top: 0.75rem; }
.card p:first-child { margin-top: 0; }
.card ul { padding-left: 1.25rem; margin: 0.5rem 0; }
.card li { margin: 0.35rem 0; }
.card strong { font-weight: 650; }
.updated { color: var(--muted); font-size: 0.9rem; margin: 0 0 1.25rem; }
.page-title { font-size: 1.9rem; letter-spacing: -0.02em; margin: 0.5rem 0 1.5rem; }

/* --- Footer --- */
footer {
  padding: 2.5rem 0 3rem;
  color: var(--muted);
  font-size: 0.85rem;
}
footer .container { border-top: 1px solid var(--border); padding-top: 1.75rem; }

@media (max-width: 520px) {
  .hero h1 { font-size: 2rem; }
  .nav .links { gap: 1rem; }
}