:root {
  color-scheme: light;
  --ink: #15193e;
  --muted: #5f6682;
  --brand: #252a63;
  --accent: #c99a35;
  --soft: #f4f6fc;
  --line: #dfe3ef;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: #ffffff;
  font-family: "Prompt", system-ui, sans-serif;
  line-height: 1.75;
}

a { color: inherit; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.site-nav {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand img { display: block; width: min(270px, 62vw); height: auto; }

.back-link,
.primary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 20px;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
}

.back-link { color: var(--brand); border: 1px solid var(--line); }
.primary-link { color: #ffffff; background: var(--brand); }
.back-link:hover, .back-link:focus-visible { border-color: var(--brand); }
.primary-link:hover, .primary-link:focus-visible { background: #3f4a96; }

.career-hero {
  padding: 84px 0 72px;
  color: #ffffff;
  background: var(--ink);
}

.career-hero p:first-child {
  margin: 0 0 18px;
  color: #e5bd62;
  font-size: 14px;
  font-weight: 700;
}

.career-hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.14;
}

.career-hero .lead {
  max-width: 780px;
  margin: 26px 0 0;
  color: #e6e9f5;
  font-size: clamp(18px, 2vw, 22px);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 64px;
  align-items: start;
  padding: 72px 0 88px;
}

.article-content { min-width: 0; }

.article-content section {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.article-content section:first-child { padding-top: 0; }
.article-content section:last-child { border-bottom: 0; }

.article-content h2 {
  margin: 0 0 14px;
  font-size: clamp(27px, 3vw, 38px);
  line-height: 1.35;
}

.article-content h3 { margin: 28px 0 8px; font-size: 21px; }
.article-content p { margin: 0 0 16px; color: #343a58; }
.article-content ul { margin: 12px 0 0; padding-left: 24px; color: #343a58; }
.article-content li + li { margin-top: 8px; }

.key-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  background: var(--line);
  border: 1px solid var(--line);
}

.key-points div { padding: 24px; background: #ffffff; }
.key-points strong { display: block; margin-bottom: 6px; font-size: 18px; }
.key-points span { color: var(--muted); }

.article-aside {
  position: sticky;
  top: 24px;
  padding: 26px;
  border-left: 3px solid var(--accent);
  background: var(--soft);
}

.article-aside strong { display: block; margin-bottom: 12px; font-size: 19px; }
.article-aside a { display: block; padding: 9px 0; color: var(--muted); text-decoration: none; }
.article-aside a:hover, .article-aside a:focus-visible { color: var(--brand); text-decoration: underline; }

.related-guides {
  padding: 62px 0;
  background: var(--soft);
}

.related-guides h2 { margin: 0 0 24px; font-size: 30px; }
.related-links { display: grid; border-top: 1px solid var(--line); }
.related-links a {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 2px;
  border-bottom: 1px solid var(--line);
  font-weight: 700;
  text-decoration: none;
}
.related-links a::after { content: "อ่านต่อ"; color: var(--muted); font-weight: 500; }
.related-links a:hover, .related-links a:focus-visible { color: #3f4a96; }

.career-cta { padding: 72px 0; color: #ffffff; background: var(--brand); }
.career-cta .container { display: flex; justify-content: space-between; gap: 40px; align-items: center; }
.career-cta h2 { max-width: 720px; margin: 0; font-size: clamp(30px, 4vw, 46px); line-height: 1.3; }
.career-cta .primary-link { flex: 0 0 auto; color: var(--ink); background: #ffffff; }

.site-footer { padding: 28px 0; color: #646b87; border-top: 1px solid var(--line); }

@media (max-width: 820px) {
  .site-nav { min-height: 74px; }
  .back-link { display: none; }
  .career-hero { padding: 58px 0; }
  .article-layout { grid-template-columns: 1fr; gap: 36px; padding: 52px 0; }
  .article-aside { position: static; }
  .key-points { grid-template-columns: 1fr; }
  .career-cta .container { display: grid; }
  .career-cta .primary-link { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}