:root {
  --color-primary: #1f4d63;
  --color-primary-contrast: #ffffff;
  --color-bg: #f4f6f7;
  --color-surface: #ffffff;
  --color-text: #24323a;
  --color-muted: #68777f;
  --font-heading: Georgia, 'Times New Roman', serif;
  --font-body: Arial, Helvetica, sans-serif;
  --radius: 0.45rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.55;
}

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

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

.site-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid #dce3e6;
}

.brand {
  color: var(--color-text);
  font-family: var(--font-heading);
}

.brand strong {
  color: var(--color-primary);
}

.topbar {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
}

.topbar a {
  color: var(--color-primary-contrast);
  text-decoration: none;
}

.topbar a:hover {
  text-decoration: underline;
}

.section-title {
  color: var(--color-primary);
  font-family: var(--font-heading);
}

.article-list>article {
  border-bottom: 1px solid #e0e5e7;
}

.article-list h3 {
  margin: 0;
  font-family: var(--font-heading);
  line-height: 1.25;
}

.article-list h3 a {
  color: var(--color-primary);
}

.article-list p {
  margin: .6rem 0 0;
}

.card {
  background: var(--color-surface);
  border: 1px solid #dce3e6;
  border-radius: var(--radius);
}

.sidebar-heading {
  color: var(--color-primary);
  font-family: var(--font-heading);
}

.search-input {
  border: 1px solid #bdc9ce;
  border-radius: var(--radius);
}

.search-button {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  border-radius: var(--radius);
}

.footer {
  color: var(--color-muted);
  border-top: 1px solid #cbd5d9;
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 1rem, 1180px);
  }
}