:root {
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #1e293b;
  --primary-strong: #0f172a;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --radius: 14px;
  --maxw: 1080px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand .mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}
.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 11px 20px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.04s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-strong); color: #fff; }
.btn-outline { background: #fff; color: var(--text); border-color: var(--border); }
.btn-outline:hover { border-color: var(--muted); }
.btn-sm { padding: 8px 16px; font-size: 14px; }

@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* Hero */
.hero {
  text-align: center;
  padding: 84px 0 64px;
}
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 50px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 auto 18px;
  max-width: 760px;
}
.hero p.lead {
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto 32px;
}
.cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.note {
  margin-top: 18px;
  font-size: 13px;
  color: var(--muted);
}

/* Sections */
section { padding: 56px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 44px; }
.section-head h2 {
  font-size: clamp(26px, 3.4vw, 34px);
  letter-spacing: -0.01em;
  margin: 0 0 12px;
}
.section-head p { color: var(--muted); font-size: 17px; margin: 0; }
.alt { background: var(--bg-alt); }

/* Feature grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}
.card .ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 16px;
}
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

/* Prose */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { font-size: 28px; letter-spacing: -0.01em; margin: 40px 0 14px; }
.prose h3 { font-size: 20px; margin: 28px 0 10px; }
.prose p { color: #334155; font-size: 17px; }
.prose ul { color: #334155; font-size: 17px; padding-left: 22px; }
.prose li { margin: 8px 0; }
.prose strong { color: var(--text); }

/* Comparison / checklist */
.checklist { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checklist li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}
.checklist .tick {
  flex-shrink: 0;
  color: #16a34a;
  margin-top: 2px;
}
.checklist b { display: block; }
.checklist span { color: var(--muted); font-size: 15px; }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; display: grid; gap: 12px; }
.faq details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px 18px;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: 16px 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-weight: 400; font-size: 22px; }
.faq details[open] summary::after { content: "\2013"; }
.faq details p { color: var(--muted); margin: 0 0 16px; font-size: 15px; }

/* CTA band */
.cta-band {
  background: var(--primary);
  color: #fff;
  border-radius: 20px;
  text-align: center;
  padding: 56px 28px;
  margin: 24px 0;
}
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); margin: 0 0 12px; color: #fff; }
.cta-band p { color: #cbd5e1; margin: 0 auto 26px; max-width: 520px; }
.cta-band .btn-primary { background: #fff; color: var(--primary-strong); }
.cta-band .btn-primary:hover { background: #e2e8f0; color: var(--primary-strong); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 40px;
  margin-top: 40px;
}
.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: space-between;
}
.footer-col h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 0 0 14px;
}
.footer-col a {
  display: block;
  color: var(--text);
  font-size: 14px;
  margin: 8px 0;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
}
.footer-bottom a { color: var(--muted); }
.footer-bottom a:hover { color: var(--text); }

/* Table */
.table-wrap { max-width: 760px; margin: 0 auto; overflow-x: auto; }
table.os {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  font-size: 15px;
}
table.os th, table.os td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--border); }
table.os th { background: var(--bg-alt); font-size: 13px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); }
table.os tr:last-child td { border-bottom: none; }
table.os td .ok { color: #16a34a; font-weight: 600; }
table.os td .partial { color: #d97706; font-weight: 600; }