:root {
  --navy: #13213a;
  --navy-light: #263d66;
  --orange: #c95f00;
  --orange-dark: #984800;
  --background: #f3f6fa;
  --surface: #ffffff;
  --text: #1e293b;
  --muted: #5d6879;
  --border: #d8e0ea;
  --blue-soft: #eaf3ff;
  --orange-soft: #fff4e7;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  line-height: 1.75;
}

a { color: #914600; }
a:hover, a:focus-visible { color: #642f00; }

.site-header {
  color: #fff;
  background: linear-gradient(135deg, var(--navy), var(--navy-light));
}

.site-nav {
  display: flex;
  width: min(var(--max-width), calc(100% - 32px));
  min-height: 64px;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-brand {
  color: #fff;
  font-weight: 800;
  letter-spacing: .02em;
  text-decoration: none;
}

.site-nav-links { display: flex; flex-wrap: wrap; gap: 20px; }
.site-nav-links a { color: #e6edf8; text-decoration: none; }
.site-nav-links a:hover, .site-nav-links a:focus-visible { color: #fff; text-decoration: underline; }

.hero {
  width: min(var(--max-width), calc(100% - 32px));
  padding: 72px 0 78px;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 12px;
  color: #ffc17f;
  font-weight: 800;
  letter-spacing: .08em;
}

.hero h1 {
  max-width: 850px;
  margin: 0 0 20px;
  font-size: clamp(2rem, 6vw, 3.65rem);
  line-height: 1.25;
}

.hero-lead {
  max-width: 760px;
  margin: 0;
  color: #e1eaf8;
  font-size: clamp(1rem, 2.5vw, 1.2rem);
}

.container {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 40px auto 64px;
}

.section { margin-top: 56px; }
.section h2, .article-body h2 {
  color: var(--navy);
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.4;
}

.section-intro { max-width: 760px; color: var(--muted); }

.featured-card,
.article-card,
.panel,
.article-body {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.featured-card {
  display: grid;
  padding: clamp(24px, 5vw, 42px);
  grid-template-columns: 1.5fr 1fr;
  gap: 32px;
  align-items: center;
}

.featured-card h2 { margin: 8px 0 12px; }
.featured-card p { color: var(--muted); }

.feature-list { padding: 22px 26px; margin: 0; background: var(--blue-soft); border-radius: 12px; }
.feature-list li + li { margin-top: 8px; }

.button {
  display: inline-block;
  padding: 13px 20px;
  color: #fff;
  background: var(--orange);
  border-radius: 9px;
  font-weight: 800;
  text-decoration: none;
}
.button:hover, .button:focus-visible { color: #fff; background: var(--orange-dark); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.article-card { display: flex; min-height: 230px; padding: 24px; flex-direction: column; }
.article-card h3 { margin: 8px 0 10px; color: var(--navy); font-size: 1.25rem; line-height: 1.45; }
.article-card p { margin: 0 0 18px; color: var(--muted); }
.article-card .text-link { margin-top: auto; font-weight: 800; }

.tag {
  display: inline-block;
  width: fit-content;
  padding: 3px 9px;
  color: #714000;
  background: var(--orange-soft);
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 800;
}

.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.panel { padding: 24px; }
.panel h3 { margin-top: 0; color: var(--navy); }
.panel p:last-child { margin-bottom: 0; }

.disclosure {
  padding: 17px 20px;
  margin: 32px 0;
  background: var(--orange-soft);
  border: 1px solid #eccb9d;
  border-radius: 10px;
  font-size: .94rem;
}

.site-footer { padding: 34px 20px; color: var(--muted); background: #fff; border-top: 1px solid var(--border); }
.footer-inner { display: flex; width: min(var(--max-width), 100%); margin: 0 auto; justify-content: space-between; gap: 24px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; }

.article-header { padding: 44px 0 50px; }
.article-header h1 { max-width: 900px; margin: 14px 0; font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.3; }
.article-header .summary { max-width: 780px; margin: 0; color: #dfe9f8; }
.meta { color: var(--muted); font-size: .92rem; }
.article-header .meta { color: #cfd9e9; }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 28px; align-items: start; }
.article-body { padding: clamp(24px, 5vw, 50px); }
.article-body h2 { padding-bottom: 9px; margin-top: 52px; border-bottom: 3px solid var(--orange); }
.article-body h2:first-child { margin-top: 0; }
.article-body h3 { margin-top: 32px; color: var(--navy); font-size: 1.2rem; }
.article-body li + li { margin-top: 7px; }
.article-body pre {
  overflow-x: auto;
  padding: 18px 20px;
  color: #edf4ff;
  background: #17233a;
  border-radius: 10px;
  line-height: 1.6;
}
.article-body code {
  padding: .1em .35em;
  background: #edf2f7;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: .92em;
}
.article-body pre code { padding: 0; color: inherit; background: transparent; }
.article-body table { width: 100%; min-width: 620px; border-collapse: collapse; }
.article-body th, .article-body td { padding: 12px 14px; text-align: left; vertical-align: top; border: 1px solid var(--border); }
.article-body th { color: var(--navy); background: #edf2f7; }
.table-wrap { overflow-x: auto; margin: 24px 0; }

.toc { position: sticky; top: 20px; padding: 22px; background: #fff; border: 1px solid var(--border); border-radius: 14px; }
.toc h2 { margin: 0 0 10px; font-size: 1.1rem; }
.toc ol { padding-left: 1.25em; margin-bottom: 0; font-size: .92rem; }
.toc li + li { margin-top: 7px; }

.callout { padding: 18px 20px; margin: 24px 0; background: var(--blue-soft); border-left: 5px solid #5c9dde; border-radius: 8px; }
.checklist { padding: 22px 26px; background: #f8fafc; border: 1px solid var(--border); border-radius: 12px; }
.author-box { padding: 22px; margin-top: 42px; background: #f8fafc; border: 1px solid var(--border); border-radius: 12px; }
.author-box h2 { padding: 0; margin: 0 0 8px; font-size: 1.2rem; border: 0; }

.amazon-button { display: block; max-width: 560px; padding: 16px 22px; margin: 32px auto; color: #fff; text-align: center; background: var(--orange); border-radius: 10px; font-weight: 800; text-decoration: none; }
.amazon-button:hover, .amazon-button:focus-visible { color: #fff; background: var(--orange-dark); }

@media (max-width: 860px) {
  .featured-card, .article-layout { grid-template-columns: 1fr; }
  .card-grid, .principles { grid-template-columns: 1fr 1fr; }
  .toc { position: static; order: -1; }
}

@media (max-width: 600px) {
  .site-nav { align-items: flex-start; flex-direction: column; padding: 16px 0; gap: 8px; }
  .site-nav-links { gap: 14px; font-size: .92rem; }
  .hero { padding: 48px 0 54px; }
  .container { width: min(100% - 20px, var(--max-width)); margin-top: 24px; }
  .card-grid, .principles { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
  .article-body { padding: 24px 19px; }
}