:root {
  --primary-color: #002f34;
  --secondary-color: #00a896;
  --accent-color: #0078fa;
  --text-color: #2b393b;
  --text-light: #5f7375;
  --bg-color: #f7f9fa;
  --card-bg: #ffffff;
  --border-color: #e8ecef;
  --max-width: 1100px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow: 0 4px 20px rgba(0, 47, 52, 0.05);
  --shadow-hover: 0 8px 30px rgba(0, 47, 52, 0.1);
  --border-radius: 12px;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Header & Navigation */
header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 47, 52, 0.02);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-color);
  gap: 8px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background-color: var(--primary-color);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  font-size: 20px;
}

.nav-menu {
  display: flex;
  gap: 20px;
  list-style: none;
}

.nav-link {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: color 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary-color);
}

/* Main Content Area */
.main-wrapper {
  max-width: var(--max-width);
  margin: 40px auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
}

@media (max-width: 900px) {
  .main-wrapper {
    grid-template-columns: 1fr;
    margin: 20px auto;
  }
}

/* Sidebar Navigation */
.sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
  background-color: var(--card-bg);
  padding: 24px;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
}

@media (max-width: 900px) {
  .sidebar {
    position: static;
  }
}

.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sidebar-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-link {
  display: block;
  padding: 10px 14px;
  color: var(--text-light);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.sidebar-link:hover {
  background-color: var(--bg-color);
  color: var(--primary-color);
}

.sidebar-link.active {
  background-color: rgba(0, 47, 52, 0.06);
  color: var(--primary-color);
  font-weight: 600;
}

/* Document Page */
.doc-card {
  background-color: var(--card-bg);
  padding: 48px;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
}

@media (max-width: 600px) {
  .doc-card {
    padding: 24px;
  }
}

.doc-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.doc-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1.2;
}

.doc-meta {
  font-size: 14px;
  color: var(--text-light);
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Document Typography */
.doc-content h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-color);
  margin-top: 36px;
  margin-bottom: 16px;
}

.doc-content h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-color);
  margin-top: 24px;
  margin-bottom: 12px;
}

.doc-content p {
  margin-bottom: 16px;
  color: var(--text-color);
}

.doc-content ul {
  margin-bottom: 24px;
  padding-left: 24px;
}

.doc-content li {
  margin-bottom: 8px;
}

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

.highlight-box {
  background-color: rgba(0, 120, 250, 0.05);
  border-left: 4px solid var(--accent-color);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 24px 0;
}

.highlight-box p {
  margin-bottom: 0;
  font-size: 14px;
  color: #3b5066;
}

/* Contact Info styling */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 32px 0;
}

.contact-card {
  background-color: var(--bg-color);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.contact-card h3 {
  margin-top: 0 !important;
  color: var(--primary-color);
  font-size: 16px;
  margin-bottom: 8px;
}

.contact-card p {
  margin-bottom: 4px !important;
  font-size: 14px;
}

/* Footer */
footer {
  background-color: var(--primary-color);
  color: #fff;
  padding: 48px 24px;
  margin-top: 80px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  list-style: none;
}

.footer-link {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #fff;
}

.copyright {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}