*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --blue-900: #0f1e6b;
  --blue-700: #1a3aad;
  --blue-600: #2250d9;
  --blue-500: #3b6bff;
  --blue-100: #dde8ff;
  --blue-50: #eef3ff;
  --gray-900: #0c0e14;
  --gray-800: #1a1d2b;
  --gray-700: #2e3347;
  --gray-500: #64698a;
  --gray-300: #c4c8dc;
  --gray-100: #f0f2f8;
  --gray-50: #f7f8fc;
  --font: 'Plus Jakarta Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', monospace;
}
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: #fff; color: var(--gray-900); line-height: 1.75; font-size: 17px; -webkit-font-smoothing: antialiased; }

.nav { border-bottom: 1px solid var(--gray-100); padding: 14px 24px; background: #fff; position: sticky; top: 0; z-index: 10; }
.nav-inner { max-width: 800px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 18px; font-weight: 800; color: var(--blue-900); text-decoration: none; display: flex; align-items: center; gap: 10px; }
.logo span { color: var(--blue-500); }
.logo img { height: 30px; width: auto; }
.nav a.back { font-size: 14px; color: var(--gray-700); text-decoration: none; font-weight: 500; }
.nav a.back:hover { color: var(--blue-600); }

article { max-width: 720px; margin: 0 auto; padding: 56px 24px 64px; }
article header { margin-bottom: 36px; padding-bottom: 28px; border-bottom: 1px solid var(--gray-100); }
article .crumb { font-size: 12px; color: var(--blue-600); font-weight: 700; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 14px; }
article .crumb a { color: inherit; text-decoration: none; }
article h1 { font-size: clamp(30px, 4.2vw, 44px); font-weight: 800; line-height: 1.18; letter-spacing: -.7px; margin-bottom: 18px; color: var(--gray-900); }
article .meta { font-size: 14px; color: var(--gray-500); font-family: var(--mono); }
article .lead { font-size: 19px; color: var(--gray-700); line-height: 1.7; margin-bottom: 28px; font-weight: 500; }
article h2 { font-size: 26px; font-weight: 800; letter-spacing: -.4px; margin: 40px 0 14px; color: var(--gray-900); }
article h3 { font-size: 19px; font-weight: 700; margin: 28px 0 10px; color: var(--gray-800); }
article p { margin-bottom: 18px; color: var(--gray-700); }
article ul, article ol { margin: 0 0 22px 22px; color: var(--gray-700); }
article li { margin-bottom: 8px; }
article strong { color: var(--gray-900); }
article a { color: var(--blue-600); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
article a:hover { color: var(--blue-700); }

.callout { background: var(--blue-50); border-left: 4px solid var(--blue-500); padding: 18px 22px; border-radius: 8px; margin: 28px 0; font-size: 16px; color: var(--gray-800); }
.callout strong { color: var(--blue-900); }

.compare-table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.compare-table th, .compare-table td { padding: 12px 14px; border: 1px solid var(--gray-100); text-align: left; }
.compare-table th { background: var(--gray-50); font-weight: 700; color: var(--gray-700); }
.compare-table tr:hover td { background: var(--blue-50); }

.cta-box { background: linear-gradient(135deg, var(--blue-900), var(--blue-700)); color: #fff; border-radius: 14px; padding: 32px; margin: 44px 0 0; text-align: center; }
.cta-box h3 { color: #fff; font-size: 22px; margin-bottom: 10px; }
.cta-box p { color: rgba(255,255,255,.78); margin-bottom: 22px; }
.cta-box a { display: inline-block; background: #fff; color: var(--blue-900); padding: 12px 24px; border-radius: 10px; font-weight: 700; text-decoration: none; }
.cta-box a:hover { background: var(--blue-50); }

footer { background: var(--gray-50); border-top: 1px solid var(--gray-100); padding: 30px 24px; text-align: center; font-size: 13px; color: var(--gray-500); }
footer a { color: var(--blue-600); text-decoration: none; }