:root {
  color-scheme: light;
  --navy: #10213f;
  --ink: #16326e;
  --blue: #1256e0;
  --green: #14885a;
  --text: #344866;
  --muted: #647694;
  --line: #dce6f2;
  --soft: #f2f6fb;
  --white: #ffffff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--soft);
  color: var(--navy);
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  line-height: 1.75;
}

a { color: var(--blue); }

img { max-width: 100%; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-inner {
  width: min(1120px, calc(100% - 32px));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--navy);
  text-decoration: none;
  font-weight: 900;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: var(--white);
  font-size: 15px;
}

.header-spacer { flex: 1; }

.nav-link,
.order-link {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-weight: 800;
}

.nav-link { color: var(--ink); }

.order-link {
  padding: 0 18px;
  border-radius: 8px;
  background: var(--blue);
  color: var(--white);
}

.article-head {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.article-head-inner,
.article-layout,
.related-inner {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
}

.article-head-inner { padding: 46px 0 34px; }

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumbs a { color: var(--ink); }

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 14px;
  font-weight: 900;
}

h1 {
  max-width: 860px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.2;
  letter-spacing: 0;
}

.lead {
  max-width: 820px;
  margin: 18px 0 0;
  color: var(--text);
  font-size: 19px;
}

.article-meta {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}

.cover {
  width: min(1040px, calc(100% - 32px));
  height: min(470px, 58vw);
  min-height: 280px;
  display: block;
  margin: 28px auto 0;
  object-fit: cover;
  object-position: 50% 28%;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 54px;
  align-items: start;
  padding: 52px 0 72px;
}

.article-body {
  min-width: 0;
  color: var(--text);
  font-size: 17px;
}

.article-body h2 {
  margin: 44px 0 12px;
  color: var(--ink);
  font-size: 28px;
  line-height: 1.3;
}

.article-body h2:first-child { margin-top: 0; }

.article-body h3 {
  margin: 28px 0 8px;
  color: var(--navy);
  font-size: 20px;
}

.article-body p { margin: 0 0 18px; }

.article-body ul {
  margin: 0 0 22px;
  padding-inline-start: 22px;
}

.article-body li { margin: 7px 0; }

.note {
  margin: 26px 0;
  padding: 18px 20px;
  border-inline-start: 4px solid var(--green);
  background: #edf8f3;
  color: #244e3f;
}

.toc {
  position: sticky;
  top: 92px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.toc strong {
  display: block;
  margin-bottom: 10px;
  color: var(--ink);
}

.toc a {
  display: block;
  padding: 7px 0;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.toc a:hover { color: var(--blue); }

.faq {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}

.faq:last-child { border-bottom: 1px solid var(--line); }

.faq summary {
  color: var(--ink);
  font-weight: 900;
  cursor: pointer;
}

.faq p { margin: 10px 0 0; }

.related {
  background: var(--ink);
  color: var(--white);
}

.related-inner {
  padding: 42px 0;
  display: flex;
  align-items: center;
  gap: 28px;
}

.related-copy { flex: 1; }

.related h2 {
  margin: 0 0 8px;
  font-size: 27px;
  line-height: 1.3;
}

.related p { margin: 0; color: #d6e2f5; }

.related .order-link {
  flex: 0 0 auto;
  background: var(--white);
  color: var(--ink);
}

.site-footer {
  padding: 26px 16px;
  background: var(--navy);
  color: #aebed7;
  text-align: center;
  font-size: 14px;
}

.site-footer a {
  margin-inline: 8px;
  color: #dce9ff;
}

@media (max-width: 760px) {
  .header-inner { width: min(100% - 24px, 1120px); gap: 10px; }
  .brand-text { display: none; }
  .nav-link { font-size: 13px; }
  .order-link { min-height: 40px; padding: 0 13px; font-size: 13px; }
  .article-head-inner { padding: 34px 0 26px; }
  h1 { font-size: 34px; }
  .lead { font-size: 17px; }
  .cover { height: 310px; min-height: 0; }
  .article-layout { grid-template-columns: 1fr; gap: 30px; padding: 38px 0 54px; }
  .article-body { font-size: 16px; }
  .article-body h2 { margin-top: 36px; font-size: 25px; }
  .toc { position: static; grid-row: 1; }
  .related-inner { display: grid; gap: 20px; }
  .related .order-link { width: 100%; }
}