:root {
  --primary-color: #1B3A5C;
  --secondary-color: #6B5530;
  --bg-color: #ffffff;
  --text-color: #171717;
  --text-muted: #4a4a4a;
  --border-color: #d1d1d1;
  --accent-light: #f4f6f8;
  --transition: all 0.3s ease-in-out;
  --font-serif: "Playfair Display", "Times New Roman", serif;
  --font-sans: "Inter", "Segoe UI", Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-sans);
  line-height: 1.7;
  font-size: 1.1rem;
  -webkit-font-smoothing: antialiased;
}

header {
  border-bottom: 3px solid var(--primary-color);
  padding: 2rem 0;
  text-align: center;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--primary-color);
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

h2 {
  font-size: 1.8rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

p {
  margin-bottom: 1.5rem;
}

a {
  color: var(--primary-color);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: var(--transition);
}

a:hover {
  color: var(--secondary-color);
}

nav {
  background: var(--accent-light);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 0;
  margin-bottom: 3rem;
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  gap: 2rem;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary-color);
}

.article-card {
  border-bottom: 1px solid var(--border-color);
  padding: 2rem 0;
  display: grid;
  grid-template-columns: 1fr;
}

.article-meta {
  font-size: 0.85rem;
  color: var(--secondary-color);
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background-color: var(--primary-color);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn:hover {
  background-color: var(--secondary-color);
  color: #ffffff;
}

.btn-secondary {
  background-color: transparent;
  border: 2px solid var(--secondary-color);
  color: var(--secondary-color);
}

.btn-secondary:hover {
  background-color: var(--secondary-color);
  color: #ffffff;
}

.sidebar {
  padding: 2rem;
  background-color: var(--accent-light);
  border-left: 4px solid var(--primary-color);
}

.category-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background-color: var(--accent-light);
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  font-size: 0.75rem;
  font-weight: bold;
  margin-right: 0.5rem;
  transition: var(--transition);
}

.category-tag:hover {
  background-color: var(--primary-color);
  color: #ffffff;
}

blockquote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
  padding-left: 1.5rem;
  border-left: 3px solid var(--secondary-color);
  margin: 2rem 0;
  color: var(--text-muted);
}

footer {
  margin-top: 5rem;
  padding: 4rem 0;
  background-color: var(--primary-color);
  color: #ffffff;
}

footer a {
  color: #ffffff;
  opacity: 0.8;
}

footer a:hover {
  opacity: 1;
  color: var(--secondary-color);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}

th {
  background-color: var(--primary-color);
  color: #ffffff;
  text-align: left;
  padding: 1rem;
  font-family: var(--font-serif);
}

td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.badge {
  background-color: var(--secondary-color);
  color: #ffffff;
  padding: 0.2rem 0.5rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  vertical-align: middle;
}

@media (max-width: 768px) {
  h1 { font-size: 1.8rem; }
  nav ul { gap: 1rem; }
  .container { padding: 0 1rem; }
}