:root {
  --primary-color: #2c5282;
  --primary-hover: #2b6cb0;
  --secondary-color: #718096;
  --success-color: #2f855a;
  --error-color: #c53030;
  --background-color: #f7fafc;
  --surface-color: #ffffff;
  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.2s ease-in-out;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  margin: 0 auto;
  padding: 0 20px;
  max-width: 900px;
  background: var(--background-color);
  color: var(--text-primary);
  line-height: 1.5;
}

.search-form {
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--surface-color);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}

.search-form input[type="text"] {
  width: 100%;
  max-width: 400px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 1rem;
  transition: var(--transition);
}

.search-form input[type="text"]:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.1);
}

.search-form button {
  padding: 0.75rem 1.5rem;
  margin-left: 0.75rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.search-form button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

table {
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
  margin-top: 1.5rem;
  background: var(--surface-color);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

th, td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: var(--background-color);
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover {
  background-color: rgba(44, 82, 130, 0.05);
}

h1, h2 {
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 1.5rem;
}

h1 {
  font-size: 2rem;
  letter-spacing: -0.025em;
}

h2 {
  font-size: 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  transition: var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.1);
}

.form-group input[type="number"] {
  width: 150px;
}

.api-key-input {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  letter-spacing: 1px;
  width: 300px !important;
}

.help-text {
  display: block;
  margin-top: 0.375rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.filter-info {
  background-color: var(--surface-color);
  padding: 1rem 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.filter-info p {
  margin: 0;
  color: var(--text-secondary);
}

.preview-info {
  margin: 1rem 0;
  padding: 1rem 1.5rem;
  background-color: var(--background-color);
  border-radius: 8px;
  font-size: 0.9rem;
  border: 1px solid var(--border-color);
}

#article-count {
  font-weight: 600;
  color: var(--primary-color);
}

.error-container {
  margin: 3rem auto;
  padding: 2.5rem;
  max-width: 600px;
  text-align: center;
  background-color: var(--surface-color);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
}

.error-message {
  color: var(--error-color);
  margin: 1rem 0;
  font-weight: 500;
}

.back-link {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.75rem 1.5rem;
  color: var(--primary-color);
  text-decoration: none;
  border: 2px solid var(--primary-color);
  border-radius: 6px;
  font-weight: 500;
  transition: var(--transition);
}

.back-link:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-1px);
}

.actions {
  margin: 1.5rem 0;
  text-align: right;
}

.download-button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--success-color);
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: var(--transition);
}

.download-button:hover {
  background-color: #234e52;
  transform: translateY(-1px);
}

.pagination {
  margin: 2.5rem 0;
  text-align: center;
}

.pagination-link {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  margin: 0 0.375rem;
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: var(--transition);
}

.pagination-link:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.pagination-info {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  margin: 0 1rem;
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-secondary);
  font-weight: 500;
}

.header-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding: 1rem 0;
}

.home-button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--secondary-color);
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: var(--transition);
}

.home-button:hover {
  background-color: #4a5568;
  transform: translateY(-1px);
}

.advanced-settings {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--surface-color);
  box-shadow: var(--shadow-sm);
}

.advanced-settings summary {
  cursor: pointer;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 1rem;
  transition: var(--transition);
}

.advanced-settings summary:hover {
  color: var(--text-primary);
}

.advanced-settings .form-group {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(247, 250, 252, 0.9);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.loading-content {
  background-color: var(--surface-color);
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  text-align: center;
  max-width: 400px;
  width: 90%;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  margin: 0 auto 1.5rem;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.progress-container {
  width: 100%;
  height: 12px;
  background-color: var(--border-color);
  border-radius: 6px;
  margin: 1.5rem 0;
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.progress-bar {
  width: 0;
  height: 100%;
  background-color: var(--success-color);
  transition: width 0.2s linear;
  background-image: linear-gradient(
    -45deg,
    rgba(255, 255, 255, 0.2) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.2) 75%,
    transparent 75%,
    transparent
  );
  background-size: 30px 30px;
  animation: progress-animation 1s linear infinite;
}

@keyframes progress-animation {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 30px 0;
  }
}

.progress-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

#progress-text {
  margin: 0.5rem 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

#progress-percentage {
  font-weight: 600;
  color: var(--primary-color);
}

#progress-speed {
  color: var(--text-secondary);
  font-size: 0.8125rem;
}

.token-usage {
  background-color: #ebf8ff;
  padding: 1.25rem;
  margin-top: 1.5rem;
  border-radius: 8px;
  border: 1px solid #bee3f8;
}

.token-usage h3 {
  margin: 0 0 0.75rem 0;
  color: #2c5282;
  font-size: 1rem;
  font-weight: 600;
}

.token-usage p {
  margin: 0.375rem 0;
  color: #2a4365;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.875rem;
}

.cost-info {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-left: 0.75rem;
  font-style: italic;
}

@media (max-width: 640px) {
  body {
    padding: 0 1rem;
  }
  
  .search-form {
    padding: 1rem;
  }
  
  .search-form input[type="text"] {
    max-width: 100%;
  }
  
  .search-form button {
    margin-left: 0;
    margin-top: 0.75rem;
    width: 100%;
  }
  
  .header-actions {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
    text-align: center;
  }
  
  .pagination-link, .pagination-info {
    display: block;
    margin: 0.5rem 0;
  }
}