:root {
  --navy: #143052;
  --navy-deep: #0b2039;
  --blue: #4f789f;
  --gold: #c9a962;
  --ink: #17243a;
  --muted: #596a80;
  --paper: #f6f9fc;
  --surface: #ffffff;
  --line: #d7e0ea;
  --soft: #edf4fa;
  --shadow: 0 18px 46px rgba(20,48,82,.1);
  --container: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.72 Inter, Arial, sans-serif; }
body.clean-page { background: linear-gradient(180deg,#edf4fa 0,#f8fafc 260px,#f6f9fc 100%); }
a { color: inherit; }
img { display: block; max-width: 100%; }
.skip-link { position: fixed; left: 14px; top: -80px; z-index: 100; padding: 10px 14px; color: #fff; background: var(--navy); }
.skip-link:focus { top: 14px; }
:focus-visible { outline: 3px solid rgba(79,120,159,.48); outline-offset: 3px; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.reading-container { width: min(calc(100% - 40px), 820px); margin-inline: auto; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(246,249,252,.95); border-bottom: 1px solid rgba(20,48,82,.12); backdrop-filter: blur(14px); }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { min-height: 56px; display: inline-flex; align-items: center; gap: 9px; text-decoration: none; }
.brand-symbol { position: relative; width: 50px; height: 50px; flex: 0 0 50px; }
.brand-symbol img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; transition: opacity .24s ease, transform .28s cubic-bezier(.22,1,.36,1); }
.brand-symbol-closed { opacity: 0; transform: scale(1.78) rotate(-2deg); }
.brand-wordmark { height: 27px; display: inline-flex; align-items: center; gap: 4px; transition: transform .28s cubic-bezier(.22,1,.36,1); }
.brand-wordmark img { display: block; width: auto; height: 100%; }
.brand:is(:hover, :focus-visible) .brand-symbol-open { opacity: 0; transform: scale(.9) rotate(2deg); }
.brand:is(:hover, :focus-visible) .brand-symbol-closed { opacity: 1; transform: scale(2.12) rotate(0); }
.brand:is(:hover, :focus-visible) .brand-wordmark { transform: translateX(2px); }
.main-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px 24px; color: var(--navy); font-size: .82rem; font-weight: 800; }
.main-nav a { min-height: 44px; display: inline-flex; align-items: center; text-decoration: none; }
.main-nav a:hover { color: var(--blue); }
.knowledge-hero { padding: 88px 0 64px; background: linear-gradient(135deg,#eef5fb,#fff); border-bottom: 1px solid var(--line); }
.knowledge-hero.clean { padding: 76px 0 48px; background: transparent; border: 0; }
.eyebrow { display: block; margin-bottom: 12px; color: var(--blue); font-size: .75rem; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
h1,h2,h3 { color: var(--navy); font-family: Georgia,"Times New Roman",serif; line-height: 1.16; }
h1 { max-width: 840px; margin: 0; font-size: clamp(2.25rem,5vw,4.4rem); }
h2 { margin: 0 0 18px; font-size: clamp(1.65rem,3vw,2.55rem); }
h3 { margin: 0; font-size: 1.15rem; }
.lead { max-width: 760px; margin: 20px 0 0; color: var(--muted); font-size: 1.08rem; }
.review-date { display: block; margin-top: 20px; color: var(--muted); font-size: .8rem; }
.cluster-index { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 0; padding: 0; list-style: none; }
.cluster-index a { min-height: 44px; display: inline-flex; align-items: center; padding: 8px 14px; color: var(--navy); background: #fff; border: 1px solid var(--line); border-radius: 999px; font-size: .76rem; font-weight: 800; text-decoration: none; }
.faq-content { padding: 24px 0 96px; }
.faq-cluster { padding-top: 54px; }
.cluster-heading { padding-bottom: 20px; border-bottom: 2px solid var(--navy); }
.cluster-heading span { display: block; margin-bottom: 6px; color: var(--blue); font-size: .72rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.faq-item { padding: 28px 0; border-bottom: 1px solid var(--line); }
.faq-item h3 { font-family: Inter,Arial,sans-serif; font-size: 1.06rem; line-height: 1.45; }
.faq-answer { margin-top: 13px; color: #33445b; }
.faq-answer p + p { margin-top: 12px; }
.source-link { display: inline-flex; margin-top: 12px; color: #315f89; font-size: .78rem; font-weight: 800; text-underline-offset: 3px; }
.legal-note { margin-top: 44px; padding: 22px 24px; color: #4f5f73; background: #fffaf0; border: 1px solid #eadcb8; border-left: 4px solid var(--gold); border-radius: 6px; font-size: .86rem; }
.blog-section { padding: 72px 0 96px; }
.blog-toolbar { display: flex; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
.blog-toolbar p { max-width: 660px; margin: 0; color: var(--muted); }
.article-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 22px; }
.article-card { min-height: 100%; display: flex; flex-direction: column; padding: 28px; background: var(--surface); border: 1px solid var(--line); border-radius: 9px; box-shadow: var(--shadow); }
.article-card .category { color: var(--blue); font-size: .7rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.article-card h2 { margin: 14px 0 12px; font-family: Inter,Arial,sans-serif; font-size: 1.25rem; line-height: 1.35; }
.article-card p { margin: 0 0 24px; color: var(--muted); font-size: .9rem; }
.article-meta { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: auto; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: .74rem; }
.article-card > a { color: var(--navy); text-decoration: none; }
.article-card > a:hover { color: var(--blue); }
.empty-state { padding: 56px 28px; text-align: center; background: #fff; border: 1px dashed #bac8d8; border-radius: 9px; }
.empty-state p { max-width: 600px; margin: 12px auto 0; color: var(--muted); }
.article-layout { padding: 68px 0 96px; }
.article-header { margin-bottom: 42px; }
.article-header h1 { font-size: clamp(2.15rem,5vw,3.75rem); }
.article-byline { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 24px; color: var(--muted); font-size: .82rem; }
.article-body { color: #2c3d54; font-size: 1.04rem; }
.article-body h2 { margin-top: 46px; }
.article-body h3 { margin-top: 32px; font-family: Inter,Arial,sans-serif; }
.article-body p { margin: 0 0 20px; }
.article-body ul { margin: 0 0 24px; padding-left: 24px; }
.article-body li + li { margin-top: 8px; }
.article-disclaimer { margin-top: 52px; padding: 22px 24px; background: var(--soft); border-left: 4px solid var(--blue); font-size: .85rem; }
.site-footer { padding: 34px 0; color: #b9c7d8; background: var(--navy-deep); }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px 18px; font-size: .78rem; font-weight: 800; }
@media (max-width: 900px) { .article-grid { grid-template-columns: repeat(2,minmax(0,1fr)); } }
@media (max-width: 640px) {
  .container,.reading-container { width: min(calc(100% - 28px),var(--container)); }
  .header-inner { padding: 12px 0; align-items: flex-start; }
  .brand { gap: 7px; }
  .brand-symbol { width: 42px; height: 42px; flex-basis: 42px; }
  .brand-wordmark { height: 22px; }
  .main-nav { display: grid; gap: 4px; text-align: right; }
  .knowledge-hero,.knowledge-hero.clean { padding: 54px 0 36px; }
  .article-grid { grid-template-columns: 1fr; }
  .blog-toolbar,.footer-inner { display: grid; }
  .faq-cluster { padding-top: 42px; }
}
@media (prefers-color-scheme: dark) {
  :root { --ink:#edf1f7; --muted:#aeb9c8; --paper:#0d0f13; --surface:#161a22; --line:rgba(255,255,255,.12); --soft:#182334; }
  body.clean-page { background:linear-gradient(180deg,#111925,#0d0f13 260px); }
  .site-header { background:rgba(13,15,19,.95); }
  .brand { padding:4px 8px; background:#f6f9fc; border-radius:8px; }
  .knowledge-hero { background:linear-gradient(135deg,#161a22,#0d0f13); }
  h1,h2,h3,.main-nav,.article-card>a,.faq-item h3 { color:#f0ede8; }
  .faq-answer,.article-body { color:#d2d9e3; }
  .cluster-index a,.article-card,.empty-state { color:#dbe2ec; background:#161a22; }
  .legal-note { color:#d6cba9; background:#1d1a12; border-color:rgba(201,169,98,.3); }
  .source-link { color:#9fc4e8; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .brand-symbol img, .brand-wordmark { transition: none; }
}