:root {
  color-scheme: light;
  --ink: #121b2b;
  --muted: #526176;
  --line: #d9e0e7;
  --accent: #146b59;
  --accent-dark: #0d5143;
  --paper: #ffffff;
  --band: #f1f6f4;
  --panel: #f7f9fa;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, "Helvetica Neue", sans-serif;
  line-height: 1.65;
}
a { color: var(--accent-dark); }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 68px;
  padding: 0 clamp(20px, 5vw, 68px);
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid var(--line);
}
.brand { font-size: 21px; font-weight: 700; color: var(--ink); text-decoration: none; }
nav { display: flex; gap: 25px; }
nav a { color: var(--muted); font-size: 15px; text-decoration: none; }
.hero { background: var(--band); border-bottom: 1px solid var(--line); }
.hero-inner {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(48px, 8vw, 78px) 0 clamp(42px, 6vw, 62px);
}
.eyebrow, .rail-label {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}
.hero h1 {
  max-width: 850px;
  margin: 0 0 18px;
  font-size: clamp(38px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}
.hero-copy {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 19px;
}
.content-band {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
  padding: 48px 0 76px;
}
.section-head { display: flex; justify-content: space-between; gap: 20px; margin-bottom: 28px; }
.section-head h2 { margin: 0; font-size: 28px; }
.section-head p { margin: 8px 0 0; color: var(--muted); }
.post-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.post-card {
  display: flex;
  flex-direction: column;
  min-height: 260px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
.post-card .meta { margin: 0 0 14px; font-size: 12px; }
.post-card h3 { margin: 0 0 10px; font-size: 20px; line-height: 1.32; }
.post-card h3 a { color: var(--ink); text-decoration: none; }
.post-card p { margin: 0 0 18px; color: var(--muted); font-size: 15px; }
.post-card .read { margin-top: auto; font-weight: 700; font-size: 14px; text-decoration: none; }
.meta { color: var(--accent); font-size: 14px; font-weight: 700; text-transform: uppercase; }
.meta span { margin-left: 12px; color: var(--muted); font-weight: 400; }
.about {
  margin-top: 56px;
  padding: 32px 0 0;
  border-top: 1px solid var(--line);
  max-width: 760px;
}
.about h2 { margin: 0 0 12px; }
.about p { color: var(--muted); }
.article-layout {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 740px) 270px;
  gap: clamp(30px, 6vw, 72px);
  padding: clamp(36px, 6vw, 58px) 0 82px;
}
.back-link { display: inline-block; margin-bottom: 28px; font-size: 14px; text-decoration: none; }
.article h1 {
  margin: 11px 0 18px;
  font-size: clamp(34px, 4.5vw, 47px);
  line-height: 1.13;
  letter-spacing: 0;
}
.lede { margin: 0 0 38px; color: var(--muted); font-size: 21px; line-height: 1.55; }
.article h2 { margin: 38px 0 12px; font-size: 25px; line-height: 1.25; }
.article p { margin: 0 0 18px; font-size: 17px; }
.study-box {
  margin: 36px 0;
  padding: 6px 28px 23px;
  background: var(--band);
  border-left: 4px solid var(--accent);
  border-radius: 0 6px 6px 0;
}
.study-box h2 { font-size: 21px; }
.study-box ul { margin: 0; padding-left: 20px; }
.study-box li { margin: 8px 0; }
.rail {
  position: sticky;
  top: 104px;
  height: max-content;
  margin-top: 104px;
  padding: 24px;
  background: var(--panel);
  border-radius: 6px;
}
.rail p:last-child { margin: 0; color: var(--muted); font-size: 15px; }
.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 38px max(calc((100% - 1100px) / 2), 20px);
  background: var(--ink);
  color: white;
}
.site-footer p { margin: 7px 0 0; color: #c7d1dc; font-size: 14px; }
.disclaimer { max-width: 510px; }
@media (max-width: 900px) {
  .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-layout { grid-template-columns: 1fr; }
  .rail { position: static; margin-top: 0; }
}
@media (max-width: 620px) {
  .site-header { min-height: 62px; padding: 0 18px; }
  .post-grid { grid-template-columns: 1fr; }
  .section-head, .site-footer { display: block; }
  .post-card { min-height: 0; }
  .article p { font-size: 16px; }
}