/* USA.gov Official Inspired Design System */
:root {
  --usa-blue-dark: #112e51;
  --usa-blue-primary: #0071bc;
  --usa-blue-light: #e1f3f8;
  --usa-red: #d83933;
  --usa-text: #212121;
  --usa-muted: #5b616b;
  --usa-bg-gray: #f1f1f1;
  --usa-border: #aeb0b5;
  --usa-font: "Source Sans Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
  font-family: var(--usa-font);
  color: var(--usa-text);
  background-color: #ffffff;
  line-height: 1.5;
}

/* TOP OFFICIAL BANNER */
.usa-banner {
  background-color: var(--usa-bg-gray);
  padding: 0.4rem 2rem;
  font-size: 0.8rem;
  color: var(--usa-muted);
  border-bottom: 1px solid var(--usa-border);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* MAIN HEADER */
header.usa-header {
  background-color: #ffffff;
  border-bottom: 4px solid var(--usa-blue-dark);
  padding: 1.25rem 2rem;
}

.usa-header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.usa-logo-group {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--usa-blue-dark);
}

.usa-logo-group svg {
  width: 44px;
  height: 44px;
}

.usa-logo-title {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  text-transform: uppercase;
}

.usa-search-container {
  display: flex;
  border: 2px solid var(--usa-blue-dark);
  border-radius: 4px;
  overflow: hidden;
  width: 320px;
}

.usa-search-container input {
  border: none;
  padding: 0.5rem 0.75rem;
  width: 100%;
  font-size: 0.95rem;
  outline: none;
}

.usa-search-container button {
  background-color: var(--usa-blue-dark);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  font-weight: bold;
  cursor: pointer;
}

/* NAVIGATION */
nav.usa-nav {
  background-color: var(--usa-blue-dark);
}

.usa-nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  padding: 0 2rem;
}

.usa-nav-container a {
  color: #ffffff;
  text-decoration: none;
  padding: 0.85rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-block;
}

.usa-nav-container a:hover {
  background-color: var(--usa-blue-primary);
}

/* HERO SECTION MATCHING USA.GOV */
.usa-hero {
  background-color: var(--usa-blue-light);
  border-bottom: 1px solid #c9e8f3;
  padding: 3.5rem 2rem;
}

.usa-hero-content {
  max-width: 1200px;
  margin: 0 auto;
}

.usa-hero h1 {
  font-size: 2.8rem;
  color: var(--usa-blue-dark);
  font-weight: 800;
  margin-bottom: 0.75rem;
  line-height: 1.15;
}

.usa-hero p {
  font-size: 1.3rem;
  color: var(--usa-text);
  max-width: 800px;
  line-height: 1.4;
}

/* GRID CATEGORY & SERVICE CARDS */
.usa-main-container {
  max-width: 1200px;
  margin: 3rem auto;
  padding: 0 2rem;
}

.usa-section-title {
  font-size: 1.8rem;
  color: var(--usa-blue-dark);
  border-bottom: 3px solid var(--usa-blue-primary);
  padding-bottom: 0.5rem;
  margin-bottom: 2rem;
}

.usa-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.usa-card {
  border: 1px solid var(--usa-border);
  border-left: 5px solid var(--usa-blue-primary);
  padding: 1.5rem;
  background: #ffffff;
  border-radius: 0 4px 4px 0;
  display: flex;
  flex-direction: column;
}

.usa-card-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--usa-blue-primary);
  margin-bottom: 0.4rem;
}

.usa-card h3 a {
  color: var(--usa-blue-dark);
  text-decoration: underline;
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.3;
}

.usa-card h3 a:hover {
  color: var(--usa-blue-primary);
}

.usa-card p {
  margin-top: 0.75rem;
  color: var(--usa-text);
  font-size: 0.98rem;
  flex-grow: 1;
}

.usa-card-footer {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--usa-muted);
}

/* POST DETAIL PAGE */
.usa-post-container {
  max-width: 820px;
  margin: 3rem auto;
  padding: 0 2rem;
}

.usa-post-container h1 {
  font-size: 2.5rem;
  color: var(--usa-blue-dark);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.usa-post-meta {
  border-bottom: 1px solid var(--usa-border);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
  color: var(--usa-muted);
  font-size: 0.9rem;
}

.usa-post-content p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.usa-post-content h2 {
  color: var(--usa-blue-dark);
  font-size: 1.6rem;
  margin: 2rem 0 1rem 0;
}

.usa-post-content ul {
  margin-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.usa-post-content li {
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}

/* FOOTER */
footer.usa-footer {
  background-color: var(--usa-blue-dark);
  color: #ffffff;
  padding: 3rem 2rem 1.5rem 2rem;
  margin-top: 5rem;
}

.usa-footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  padding-bottom: 2rem;
  margin-bottom: 1.5rem;
}

.usa-footer-title {
  font-size: 1.4rem;
  font-weight: 800;
  text-transform: uppercase;
}

.usa-footer-links a {
  color: #ffffff;
  text-decoration: underline;
  margin-left: 1.5rem;
  font-size: 0.9rem;
}

.usa-footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  font-size: 0.85rem;
  color: var(--usa-blue-light);
}

@media (max-width: 768px) {
  .usa-header-container { flex-direction: column; gap: 1rem; }
  .usa-search-container { width: 100%; }
  .usa-hero h1 { font-size: 2.1rem; }
  .usa-grid { grid-template-columns: 1fr; }
  .usa-footer-container { flex-direction: column; gap: 1rem; text-align: center; }
  .usa-footer-links a { margin: 0 0.5rem; }
}