:root {
  --primary: #1a365d;
  --primary-dark: #0f2442;
  --accent: #2c5282;
  --light: #f7fafc;
  --gray: #718096;
  --gray-light: #e2e8f0;
  --white: #ffffff;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 40px 0;
  box-shadow: var(--shadow-lg);
}

header h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 10px;
}

header p {
  font-size: 16px;
  opacity: 0.9;
  max-width: 800px;
}

/* Search */
.search-container {
  background: var(--white);
  padding: 30px 0;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.search-box {
  display: flex;
  gap: 15px;
  max-width: 800px;
  margin: 0 auto;
}

.search-input {
  flex: 1;
  padding: 14px 20px;
  border: 2px solid var(--gray-light);
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.3s;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
}

.search-btn {
  padding: 14px 30px;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
}

.search-btn:hover {
  background: var(--primary);
}

/* Categories */
.categories {
  padding: 40px 0;
}

.category-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 30px;
  justify-content: center;
}

.category-tab {
  padding: 12px 24px;
  background: var(--white);
  border: 2px solid var(--gray-light);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.category-tab:hover {
  border-color: var(--accent);
  background: #ebf8ff;
}

.category-tab.active {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

/* Documents Grid */
.documents-section {
  padding: 20px 0 60px;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 30px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.documents-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 24px;
}

.document-card {
  background: var(--white);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
  border: 1px solid var(--gray-light);
}

.document-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.document-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--primary);
}

.document-card p {
  font-size: 14px;
  color: var(--gray);
  margin-bottom: 20px;
  line-height: 1.5;
}

.document-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--gray-light);
}

.document-type {
  font-size: 12px;
  padding: 4px 12px;
  background: #ebf8ff;
  color: var(--accent);
  border-radius: 20px;
  font-weight: 600;
  text-transform: uppercase;
}

.view-btn {
  padding: 8px 20px;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
}

.view-btn:hover {
  background: var(--primary);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--white);
  border-radius: 12px;
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  padding: 24px;
  border-bottom: 1px solid var(--gray-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background: var(--white);
  border-radius: 12px 12px 0 0;
}

.modal-header h2 {
  font-size: 22px;
  color: var(--primary);
}

.close-btn {
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--gray);
  transition: color 0.3s;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.close-btn:hover {
  color: var(--primary);
}

.modal-body {
  padding: 24px;
}

.document-content {
  background: var(--light);
  padding: 30px;
  border-radius: 8px;
  font-family: "Courier New", Courier, monospace;
  font-size: 14px;
  line-height: 1.8;
  white-space: pre-wrap;
  max-height: 60vh;
  overflow-y: auto;
  border: 1px solid var(--gray-light);
}

.modal-footer {
  padding: 24px;
  border-top: 1px solid var(--gray-light);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  position: sticky;
  bottom: 0;
  background: var(--white);
  border-radius: 0 0 12px 12px;
}

.download-btn {
  padding: 12px 30px;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.download-btn:hover {
  background: var(--primary);
}

.secondary-btn {
  padding: 12px 30px;
  background: var(--white);
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.secondary-btn:hover {
  background: #ebf8ff;
}

/* No Results */
.no-results {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray);
}

.no-results h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

/* Footer */
footer {
  background: var(--primary-dark);
  color: var(--white);
  padding: 30px 0;
  text-align: center;
}

footer p {
  font-size: 14px;
  opacity: 0.8;
}

/* Responsive */
@media (max-width: 768px) {
  header h1 {
    font-size: 24px;
  }

  header p {
    font-size: 14px;
  }

  .search-box {
    flex-direction: column;
  }

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

  .category-tabs {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 10px;
  }

  .category-tab {
    white-space: nowrap;
  }

  .modal {
    max-height: 95vh;
    margin: 10px;
  }

  .modal-header h2 {
    font-size: 18px;
  }

  .document-content {
    padding: 20px;
    font-size: 13px;
  }

  .modal-footer {
    flex-direction: column;
  }

  .download-btn,
  .secondary-btn {
    width: 100%;
    justify-content: center;
  }
}

/* Print styles */
@media print {
  .modal-overlay {
    position: absolute;
    background: white;
  }

  .modal {
    max-width: 100%;
    box-shadow: none;
  }

  .modal-header,
  .modal-footer {
    display: none;
  }

  .document-content {
    max-height: none;
    border: none;
    padding: 0;
  }
}