:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1c2430;
  --muted: #5a6575;
  --primary: #1f6f5c;
  --primary-dark: #17564a;
  --accent-bg: #e8f3f0;
  --border: #e1e5ea;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11161c;
    --surface: #1a212a;
    --text: #e8ecf1;
    --muted: #9aa5b4;
    --primary: #4fc3a6;
    --primary-dark: #7ad8c0;
    --accent-bg: #1c2d2a;
    --border: #2a323d;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

a { color: var(--primary); }
a:hover { color: var(--primary-dark); }

.container {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
  gap: 16px;
}
.brand {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
  text-decoration: none;
}
.brand span { color: var(--primary); }
nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
nav a:hover { color: var(--primary); }

/* Hero */
.hero {
  padding: 72px 0 64px;
  text-align: center;
  background: linear-gradient(180deg, var(--accent-bg), var(--bg));
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.15;
  margin: 0 0 16px;
}
.hero p {
  max-width: 640px;
  margin: 0 auto 28px;
  color: var(--muted);
  font-size: 1.1rem;
}
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}
.btn:hover { background: var(--primary-dark); color: #fff; }
.btn.secondary {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  margin-left: 8px;
}
.btn.secondary:hover { background: var(--accent-bg); color: var(--primary-dark); }

/* Sections */
section { padding: 56px 0; }
section h2 { font-size: 1.7rem; margin: 0 0 8px; }
.lead { color: var(--muted); margin: 0 0 32px; max-width: 640px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 1.1rem; }
.card p { margin: 0; color: var(--muted); font-size: .96rem; }

.alt { background: var(--surface); border-block: 1px solid var(--border); }

.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.checks li { padding-left: 28px; position: relative; }
.checks li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

/* Policy page */
.policy {
  max-width: 800px;
  margin: 40px auto 56px;
  padding: 32px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.policy h1 { margin: 0 0 8px; font-size: 2rem; }
.policy h2 { font-size: 1.25rem; margin: 32px 0 8px; }
.policy ul { padding-left: 22px; }
.policy li { margin-bottom: 6px; }
.meta {
  background: var(--accent-bg);
  border-radius: 8px;
  padding: 14px 18px;
  font-size: .95rem;
  margin: 16px 0;
}
.meta p { margin: 2px 0; }

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--muted);
  font-size: .9rem;
  text-align: center;
}
footer a { margin: 0 8px; }

@media (max-width: 520px) {
  .btn.secondary { margin: 10px 0 0; }
  .policy { padding: 22px 16px; margin: 16px auto 40px; border-radius: 0; border-inline: 0; }
}