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

:root {
  --primary: #1a365d;
  --secondary: #2d3748;
  --accent: #2b6cb0;
  --surface: #ffffff;
  --background: #f7fafc;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --border: #e2e8f0;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-lg: rgba(0, 0, 0, 0.15);
}

html, body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
/* Navigation */
.nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  margin-bottom: 32px;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: 64px 32px;
  text-align: center;
  margin-bottom: 48px;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.025em;
}

.hero p {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: 24px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.meta-info {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.meta-item {
  background: rgba(255, 255, 255, 0.1);
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
}

.actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  background: var(--accent);
  color: white;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.875rem;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.btn:hover {
  background: #1e40af;
  transform: translateY(-1px);
}

.btn.secondary {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.3);
}

.btn.secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Sections */
.section {
  margin-bottom: 48px;
}

.section-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 8px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  transition: all 0.2s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--shadow-lg);
  border-color: var(--accent);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  color: white;
  flex-shrink: 0;
}

.icon-blue { background: #2563eb; }
.icon-green { background: #059669; }
.icon-yellow { background: #d97706; }
.icon-purple { background: #7c3aed; }
.icon-red { background: #dc2626; }

.card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.card p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.5;
}

.card-link {
  display: inline-block;
  background: var(--accent);
  color: white;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.875rem;
  transition: background 0.2s;
}

.card-link:hover {
  background: #1e40af;
}

.meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.tag {
  background: var(--background);
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--border);
}

/* Footer */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
  margin-top: 64px;
}

.footer p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

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

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1.125rem;
  }
  
  .meta-info {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }
  
  .actions {
    flex-direction: column;
    align-items: center;
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
  
  .nav-content {
    flex-direction: column;
    gap: 16px;
  }
  
  .nav-links {
    gap: 16px;
  }
}