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

body {
  font-family: 'Google Sans', 'Roboto', 'Segoe UI', Arial, sans-serif;
  background-color: #fff;
  color: #1a1a1a;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app {
  min-height: 100vh;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid #dadce0;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #4285f4, #34a853);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 18px;
}

.site-logo h1 {
  font-size: 1.25rem;
  font-weight: 500;
  color: #202124;
}

.site-nav {
  display: flex;
  gap: 8px;
}

.site-nav a {
  text-decoration: none;
  color: #5f6368;
  padding: 8px 16px;
  border-radius: 4px;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.site-nav a:hover {
  background: #f1f3f4;
  color: #202124;
}

.module-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
}

.hero-section {
  background: #f8f9fa;
  padding: 48px 24px;
  text-align: center;
  border-bottom: 1px solid #dadce0;
}

.hero-section h1 {
  font-size: 2.75rem;
  font-weight: 400;
  color: #202124;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.hero-meta {
  font-size: 1rem;
  color: #5f6368;
  margin-bottom: 16px;
}

.hero-description {
  font-size: 1.1rem;
  color: #3c4043;
  max-width: 700px;
  margin: 0 auto;
}

.content-section {
  padding: 48px 24px;
}

.section-container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 400;
  color: #202124;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid #dadce0;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.content-card {
  background: #fff;
  border: 1px solid #dadce0;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.2s, transform 0.2s;
  cursor: pointer;
}

.content-card:hover {
  box-shadow: 0 4px 12px rgba(60, 64, 67, 0.15);
  transform: translateY(-2px);
}

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

.card-icon {
  width: 48px;
  height: 48px;
  background: #e8f0fe;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 500;
  color: #202124;
}

.card-description {
  font-size: 0.9rem;
  color: #5f6368;
  margin-bottom: 16px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: #1a73e8;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}

.card-link:hover {
  text-decoration: underline;
}

.files-section {
  background: #f8f9fa;
  padding: 48px 24px;
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: #fff;
  border: 1px solid #dadce0;
  border-radius: 8px;
  text-decoration: none;
  transition: box-shadow 0.2s;
}

.file-item:hover {
  box-shadow: 0 2px 8px rgba(60, 64, 67, 0.1);
}

.file-icon {
  width: 40px;
  height: 40px;
  background: #fef7e0;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.file-info {
  flex: 1;
}

.file-name {
  font-size: 0.95rem;
  font-weight: 500;
  color: #202124;
  margin-bottom: 4px;
}

.file-meta {
  font-size: 0.8rem;
  color: #5f6368;
}

.file-download {
  color: #5f6368;
  font-size: 1.25rem;
}

.site-footer {
  background: #f8f9fa;
  border-top: 1px solid #dadce0;
  padding: 24px;
  text-align: center;
  color: #5f6368;
  font-size: 0.85rem;
}

.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 300px;
  color: #5f6368;
  font-size: 1rem;
}

.error {
  text-align: center;
  padding: 60px 24px;
  color: #5f6368;
}

@media (max-width: 768px) {
  .site-header {
    flex-direction: column;
    gap: 16px;
  }

  .hero-section h1 {
    font-size: 2rem;
  }

  .content-grid {
    grid-template-columns: 1fr;
  }
}