*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --green: #00C853;
  --green-light: #00E676;
  --green-dark: #00A844;
  --green-bg: rgba(0, 200, 83, 0.06);
  --green-border: rgba(0, 200, 83, 0.18);
  --bg: #ffffff;
  --surface: #f8faf9;
  --border: #e2e8f0;
  --text: #1a1a2e;
  --text-secondary: #64748b;
  --radius: 14px;
}

body {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Nav ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 800px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
}
.nav-logo {
  font-size: 22px; font-weight: 800; color: var(--green);
}
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  color: var(--text-secondary); font-size: 14px; font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ── Content ── */
.content {
  max-width: 700px; margin: 0 auto;
  padding: 120px 24px 80px;
}
.content h1 {
  font-size: 38px; font-weight: 800; margin-bottom: 10px;
}
.content .lead {
  font-size: 17px; color: var(--text-secondary); margin-bottom: 48px;
}
.content h2 {
  font-size: 18px; font-weight: 700;
  margin-top: 40px; margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--green-border);
  display: inline-block;
}
.content h3 {
  font-size: 15px; font-weight: 600;
  margin-top: 24px; margin-bottom: 8px;
  color: var(--text);
}
.content p {
  font-size: 15px; color: var(--text-secondary); margin-bottom: 14px;
}
.content ul, .content ol {
  padding-left: 22px; margin-bottom: 16px;
}
.content li {
  font-size: 15px; color: var(--text-secondary); margin-bottom: 6px;
}

/* ── Info boxes ── */
.info-box {
  background: var(--green-bg);
  border: 1px solid var(--green-border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 20px 0;
  font-size: 14px;
  color: var(--text);
}
.info-box strong {
  color: var(--green-dark);
}

/* ── Data table ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 14px;
}
.data-table th {
  text-align: left;
  font-weight: 600;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}
.data-table td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: top;
}
.data-table tr:hover td {
  background: var(--green-bg);
}

/* ── Doc links (index page) ── */
.doc-link {
  display: flex; align-items: center; gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  text-align: left;
  transition: border-color 0.2s, transform 0.15s;
  color: var(--text);
}
.doc-link:hover {
  border-color: var(--green);
  transform: translateY(-2px);
  text-decoration: none;
}
.doc-link-icon { font-size: 24px; flex-shrink: 0; }
.doc-link strong { display: block; font-size: 15px; margin-bottom: 2px; }
.doc-link-sub { display: block; font-size: 13px; color: var(--text-secondary); }
.doc-link-arrow { margin-left: auto; color: var(--green); font-size: 18px; }

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px; text-align: center;
  color: var(--text-secondary); font-size: 13px;
}
footer .footer-links {
  display: flex; justify-content: center; gap: 24px; margin-bottom: 16px;
}
footer .footer-links a { color: var(--text-secondary); font-size: 13px; }
footer .footer-links a:hover { color: var(--text); }

/* ── Responsive ── */
@media (max-width: 640px) {
  .nav-links { gap: 16px; }
  .content h1 { font-size: 28px; }
  .content { padding: 100px 18px 60px; }
  .data-table { font-size: 13px; }
  .data-table th, .data-table td { padding: 8px 10px; }
}