:root {
  --bg: #f8fafc; --card: #ffffff; --dark: #0f172a; --primary: #1d4ed8; --primary-dark: #1e40af;
  --primary-light: #eff6ff; --amber: #f59e0b; --amber-dark: #b45309; --text: #334155; --muted: #64748b;
  --border: #e2e8f0; --green: #047857; --red: #b91c1c; --radius: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter", sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; font-size: 17px; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); }
h1, h2, h3 { color: var(--dark); line-height: 1.25; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
img { max-width: 100%; }
[hidden] { display: none !important; }

.disclosure-bar { background: var(--dark); color: #cbd5e1; font-size: 13px; text-align: center; padding: 7px 16px; }
.disclosure-bar a { color: #93c5fd; }
.site-header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
.brand { font-weight: 900; font-size: 21px; color: var(--dark); text-decoration: none; letter-spacing: -0.3px; }
.brand span { color: var(--primary); }
.nav { display: flex; gap: 18px; flex-wrap: wrap; }
.nav a { color: var(--text); text-decoration: none; font-weight: 600; font-size: 15px; }
.nav a:hover { color: var(--primary); }

.btn { display: inline-block; background: var(--amber); color: #111827; font-weight: 800; text-decoration: none; padding: 12px 20px; border-radius: 10px; border: 0; }
.btn:hover { background: #fbbf24; }
.btn-sm { padding: 7px 12px; font-size: 14px; white-space: nowrap; }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.4); }
.btn-ghost:hover { background: rgba(255,255,255,0.08); }

.hero { background: linear-gradient(135deg, #0f172a, #1e3a8a); color: #e2e8f0; padding: 64px 0 56px; }
.hero h1 { color: #fff; font-size: clamp(30px, 5vw, 46px); max-width: 720px; margin-bottom: 16px; }
.hero p { max-width: 640px; font-size: 18px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }

.calc-promo { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; background: var(--primary-light); border: 1px solid #bfdbfe; border-radius: var(--radius); padding: 24px; margin: 32px 0; }
.calc-promo h2 { font-size: 22px; margin-bottom: 4px; }
#guides > h2, .how h2 { font-size: 28px; margin: 12px 0 16px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.filters input { flex: 1 1 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 10px; font-size: 16px; }
.chip { background: #fff; border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px; font-size: 14px; font-weight: 600; cursor: pointer; color: var(--text); }
.chip.active { background: var(--dark); color: #fff; border-color: var(--dark); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr)); gap: 18px; }
.card { display: flex; flex-direction: column; gap: 8px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; text-decoration: none; color: var(--text); transition: box-shadow .15s, transform .15s; }
.card:hover { box-shadow: 0 10px 25px -8px rgba(15,23,42,.18); transform: translateY(-2px); }
.card[hidden] { display: none; }
.card h3 { font-size: 19px; }
.card p { font-size: 15px; }
.card-cat { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .5px; color: var(--primary); }
.card-models { color: var(--muted); font-size: 13.5px !important; }
.card-cta { margin-top: auto; font-weight: 700; color: var(--primary); }
.empty { padding: 20px; text-align: center; color: var(--muted); }
.how { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; margin: 40px 0; }

.article { max-width: 780px; padding-top: 28px; padding-bottom: 48px; }
.article h1 { font-size: clamp(28px, 4.5vw, 38px); margin-bottom: 10px; }
.article h2 { font-size: 25px; margin: 38px 0 14px; }
.article h3 { font-size: 20px; margin: 22px 0 8px; }
.article p, .article ul { margin-bottom: 14px; }
.article ul { padding-left: 22px; }
.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); }
.meta { color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.lede { font-size: 18.5px; }
.notice { background: #fffbeb; border: 1px solid #fde68a; border-radius: 10px; padding: 14px 16px; font-size: 15px; margin-bottom: 22px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; background: #fff; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { background: #f1f5f9; font-size: 13px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
tr:last-child td { border-bottom: 0; }
.product { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin: 18px 0; }
.product h3 { margin-top: 6px; }
.badge { display: inline-block; background: var(--primary-light); color: var(--primary-dark); font-weight: 800; font-size: 13px; padding: 3px 10px; border-radius: 999px; margin-bottom: 0 !important; }
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 6px 0 12px; }
.pros-cons ul { font-size: 15.5px; margin-bottom: 0 !important; }
.pc-h { font-weight: 800; font-size: 14px; margin-bottom: 4px !important; }
.pros-h { color: var(--green); }
.cons-h { color: var(--red); }
.skip { font-size: 15.5px; background: #f8fafc; border-radius: 8px; padding: 10px 12px; }
.related { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(220px, 100%), 1fr)); gap: 12px; }
.related-card { display: block; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 14px; text-decoration: none; color: var(--dark); font-weight: 700; font-size: 15px; line-height: 1.4; }
.related-card span { display: block; font-size: 12px; color: var(--primary); text-transform: uppercase; letter-spacing: .4px; margin-bottom: 4px; }

.art { display: block; width: 100%; height: 100%; color: var(--primary); }
.art .f { fill: #dbeafe; }
.art .t { fill: currentColor; stroke: none; font: 900 26px -apple-system, "Segoe UI", sans-serif; }
.card-art { background: linear-gradient(135deg, #eff6ff, #f8fafc); border-radius: 10px; height: 120px; padding: 12px; margin: -6px -6px 6px; }
.article-art { background: linear-gradient(135deg, #eff6ff, #f8fafc); border: 1px solid #dbeafe; border-radius: var(--radius); height: 150px; padding: 16px; margin-bottom: 18px; }
.toc { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 12px 16px; margin: 4px 0 8px; font-size: 15px; }
.toc span { font-weight: 800; color: var(--dark); }
.toc a { text-decoration: none; font-weight: 600; }
.table-note { font-size: 13.5px; color: var(--muted); margin-top: 8px; }
.faq { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 0 16px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 700; color: var(--dark); padding: 14px 0; list-style-position: outside; }
.faq p { margin: 0 0 14px !important; }
.start { margin: 36px 0 8px; }
.start h2 { font-size: 26px; margin-bottom: 14px; }
.steps { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); gap: 14px; }
.steps a { display: block; height: 100%; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; text-decoration: none; color: var(--text); font-size: 15px; transition: box-shadow .15s; }
.steps a:hover { box-shadow: 0 10px 25px -8px rgba(15,23,42,.18); }
.steps strong { display: block; color: var(--dark); font-size: 17px; margin-bottom: 4px; }
.step-n { display: inline-flex; width: 28px; height: 28px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 800; align-items: center; justify-content: center; margin-bottom: 8px; font-size: 14px; }

.site-footer { background: var(--dark); color: #94a3b8; padding: 40px 0 24px; font-size: 14.5px; margin-top: 40px; }
.site-footer a { color: #cbd5e1; display: block; text-decoration: none; margin-bottom: 4px; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; }
.footer-brand { color: #fff; margin-bottom: 8px; }
.footer-h { color: #fff; font-weight: 800; margin-bottom: 8px; }
.footer-note { border-top: 1px solid #1e293b; margin-top: 28px; padding-top: 18px; font-size: 13px; }
.footer-note p { margin-bottom: 8px; }

@media (max-width: 720px) {
  body { font-size: 16px; }
  .pros-cons, .footer-grid { grid-template-columns: 1fr; }
  .nav { gap: 12px; }
  .nav a { font-size: 14px; }
  .hero { padding: 44px 0 40px; }
}