/* ---- Design tokens ---- */
:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --color-bg: #ffffff;
  --color-surface: #f5f9f7;
  --color-text: #152026;
  --color-text-muted: #4b5a63;
  --color-primary: #10b981;
  --color-primary-dark: #059669;
  --color-navy: #152742;
  --color-border: #e2e8ee;
  --color-success: #15803d;
  --max-width: 1120px;
  --radius: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary-dark); }
a:hover { text-decoration: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---- Header ---- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-navy);
  text-decoration: none;
}
.brand img { width: 30px; height: 30px; }
.main-nav ul {
  list-style: none;
  display: flex;
  gap: 22px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.main-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.main-nav a:hover { color: var(--color-primary-dark); }
.header-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
}
.header-cta:hover { background: var(--color-primary-dark); }

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  font-size: 1.05rem;
  text-align: center;
  cursor: pointer;
  border: none;
}
.btn-primary { background: var(--color-primary); color: #fff !important; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-block { display: block; width: 100%; }
.cta-sub { font-size: 0.82rem; color: var(--color-text-muted); margin-top: 8px; }

/* ---- Disclosure banner ---- */
.disclosure-banner {
  background: #f0fdf6;
  border-bottom: 1px solid #cdf0dd;
  font-size: 0.82rem;
  color: #146c43;
  text-align: center;
  padding: 7px 16px;
}
.disclosure-banner a { color: #146c43; text-decoration: underline; }
.disclosure-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin: 28px 0;
}

/* ---- Hero ---- */
.hero {
  background: linear-gradient(180deg, #eefaf3 0%, #ffffff 100%);
  padding: 44px 0 36px;
}
.breadcrumbs {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 14px;
}
.breadcrumbs a { color: var(--color-text-muted); }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px; padding: 0; margin: 0; }
.hero h1 { font-size: clamp(1.7rem, 4vw, 2.5rem); line-height: 1.2; margin: 0 0 14px; color: var(--color-navy); }
.hero .lede { font-size: 1.15rem; color: var(--color-text-muted); max-width: 760px; }
.hero-meta { display: flex; gap: 18px; flex-wrap: wrap; font-size: 0.85rem; color: var(--color-text-muted); margin-top: 16px; }
.rating-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 16px;
  font-weight: 700;
  color: var(--color-navy);
}
.stars { color: #f5a623; letter-spacing: 1px; }

/* ---- Article layout ---- */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 48px;
  padding: 40px 0 64px;
  align-items: start;
}
@media (max-width: 880px) {
  .article-layout { grid-template-columns: minmax(0, 1fr); }
}
.prose h2 {
  font-size: 1.55rem;
  color: var(--color-navy);
  margin: 2.2em 0 0.7em;
  scroll-margin-top: 80px;
}
.prose h3 {
  font-size: 1.2rem;
  color: var(--color-navy);
  margin: 1.8em 0 0.6em;
  scroll-margin-top: 80px;
}
.prose p { margin: 0 0 1.1em; max-width: 72ch; }
.prose ul, .prose ol { margin: 0 0 1.3em; padding-left: 1.4em; max-width: 72ch; }
.prose li { margin-bottom: 0.5em; }
.prose blockquote {
  border-left: 4px solid var(--color-primary);
  margin: 1.5em 0;
  padding: 0.6em 1.2em;
  background: var(--color-surface);
  border-radius: 0 8px 8px 0;
  font-style: italic;
}
.prose table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: 0.92rem; }
.prose table { display: block; max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.prose th, .prose td { border: 1px solid var(--color-border); padding: 10px 12px; text-align: left; }
.prose th { background: var(--color-surface); font-weight: 700; }
.prose mark { background: #fff1cc; padding: 0 3px; }
.prose strong { color: var(--color-navy); }

/* ---- Sidebar / TOC ---- */
.sidebar { position: sticky; top: 84px; }
.toc-box, .sidebar-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 20px;
}
.toc-box h2, .sidebar-box h2 { font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-navy); margin: 0 0 12px; }
.toc-box ol { list-style: none; margin: 0; padding: 0; font-size: 0.88rem; }
.toc-box li { margin-bottom: 8px; }
.toc-box a { color: var(--color-text-muted); text-decoration: none; }
.toc-box a:hover { color: var(--color-primary-dark); }

/* ---- Cards / grids ---- */
.grid { display: grid; gap: 22px; min-width: 0; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 760px) { .grid-2, .grid-3 { grid-template-columns: minmax(0, 1fr); } }
.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  background: #fff;
}
.card h3 { margin: 0 0 8px; font-size: 1.05rem; color: var(--color-navy); }
.article-card { display: block; text-decoration: none; color: inherit; }
.article-card .tag { font-size: 0.75rem; text-transform: uppercase; color: var(--color-primary-dark); font-weight: 700; letter-spacing: 0.03em; }
.article-card h3 { margin: 6px 0 8px; font-size: 1.08rem; color: var(--color-navy); }
.article-card p { margin: 0; font-size: 0.92rem; color: var(--color-text-muted); }

/* ---- FAQ accordion ---- */
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  padding: 16px 4px;
  color: var(--color-navy);
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; color: var(--color-primary); flex-shrink: 0; }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item .faq-answer { padding: 0 4px 18px; color: var(--color-text-muted); }

/* ---- Pros/cons ---- */
.pros-cons { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.pros-cons .card ul { padding-left: 1.2em; margin: 0; }
@media (max-width: 600px) { .pros-cons { grid-template-columns: minmax(0, 1fr); } }
.pros { border-color: #bfe3cc; background: #f3fbf6; }
.cons { border-color: #f2c9b8; background: #fff6f2; }

/* ---- Footer ---- */
.site-footer {
  background: var(--color-navy);
  color: #cfd9e6;
  padding: 44px 0 26px;
  margin-top: 60px;
  font-size: 0.9rem;
}
.site-footer a { color: #cfd9e6; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr); gap: 30px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.footer-grid .footer-heading { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; margin: 0 0 12px; font-weight: 700; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid #2c4363;
  margin-top: 30px;
  padding-top: 20px;
  font-size: 0.8rem;
  color: #9fb0c8;
}

/* ---- Steps ---- */
.steps { list-style: none; padding: 0; margin: 1.5em 0; counter-reset: step; }
.steps li { counter-increment: step; position: relative; padding-left: 44px; margin-bottom: 20px; }
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 30px; height: 30px;
  background: var(--color-primary);
  color: #fff; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem;
}

/* ---- Utility ---- */
.section { padding: 48px 0; }
.section-alt { background: var(--color-surface); }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.small { font-size: 0.85rem; color: var(--color-text-muted); }
.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--color-navy); color: #fff; padding: 10px 16px; z-index: 100;
}
.skip-link:focus { left: 10px; top: 10px; }