:root {
  --ink: #102a43;
  --ink-soft: #486581;
  --paper: #f5f8fb;
  --card: rgba(255, 255, 255, 0.94);
  --line: #d9e2ec;
  --blue: #1d4ed8;
  --teal: #0f766e;
  --shadow: 0 18px 45px rgba(16, 42, 67, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 5%, rgba(29, 78, 216, 0.13), transparent 28rem),
    var(--paper);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.7;
}

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

.shell {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
}

.brand,
.header-link {
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.header-link {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.article-shell {
  padding: 4rem 0 5rem;
}

.article-header {
  max-width: 800px;
  margin-bottom: 2.5rem;
}

.eyebrow {
  color: var(--teal);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 850px;
  margin: 0.8rem 0 1rem;
  font-size: clamp(2.5rem, 7vw, 5rem);
}

h2 {
  margin-top: 2.8rem;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
}

h3 {
  margin-top: 0;
  font-size: 1.25rem;
}

.lede {
  max-width: 760px;
  color: var(--ink-soft);
  font-size: 1.2rem;
}

.article-body {
  max-width: 800px;
}

.article-body ul,
.article-body ol {
  padding-left: 1.4rem;
}

.article-body li {
  margin: 0.55rem 0;
}

.callout,
.figure-card,
.cta {
  margin: 2rem 0;
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--card);
  box-shadow: var(--shadow);
}

.callout strong {
  color: var(--teal);
}

.figure-card img {
  display: block;
  width: 100%;
  max-height: 520px;
  object-fit: contain;
  border-radius: 0.65rem;
  background: #101a2c;
}

figcaption {
  margin-top: 0.85rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.cta {
  color: #fff;
  background: var(--ink);
}

.cta p {
  color: #d9e2ec;
}

.button {
  display: inline-block;
  padding: 0.75rem 1rem;
  border-radius: 0.7rem;
  color: #fff;
  background: var(--blue);
  font-weight: 800;
  text-decoration: none;
}

.button.secondary {
  margin-left: 0.5rem;
  color: #fff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.article-list {
  display: grid;
  gap: 1.25rem;
  max-width: 820px;
}

.article-card {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--card);
  box-shadow: 0 10px 25px rgba(16, 42, 67, 0.07);
}

.article-card h2 {
  margin: 0 0 0.6rem;
  font-size: 1.55rem;
}

.article-card p {
  margin: 0 0 0.8rem;
  color: var(--ink-soft);
}

.footer {
  padding: 1.4rem 0 2rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.9rem;
}

@media (max-width: 560px) {
  .site-header {
    flex-direction: column;
  }

  .article-shell {
    padding-top: 2.5rem;
  }

  .button.secondary {
    margin: 0.75rem 0 0;
  }
}