body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: #f5f5f5;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}

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

.header {
  text-align: center;
  margin-bottom: 40px;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: relative;
}

.header h1 {
  color: #2c3e50;
  margin: 0 0 10px 0;
  font-size: 2.5em;
}

.header p {
  color: #7f8c8d;
  margin: 0;
  font-size: 1.1em;
}

.ai-budget-bar {
  position: absolute;
  top: 10px;
  right: 20px;
  background: #ecf0f1;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.85em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.budget-summary {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.budget-label {
  color: #34495e;
}

.budget-used {
  color: #27ae60;
  font-weight: bold;
}

.budget-separator {
  color: #bdc3c7;
}

.budget-total {
  color: #34495e;
  font-weight: bold;
}

.budget-mini-bar {
  width: 60px;
  height: 4px;
  background: #ecf0f1;
  border-radius: 2px;
  overflow: hidden;
}

.budget-mini-fill {
  height: 100%;
  transition: width 0.3s ease;
}

.budget-tokens {
  color: #7f8c8d;
  font-size: 0.9em;
}

.budget-refresh-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1em;
  padding: 2px;
  border-radius: 3px;
  transition: background-color 0.2s;
}

.budget-refresh-btn:hover {
  background-color: #bdc3c7;
}

.nav-buttons {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 20px 0;
  flex-wrap: wrap;
}

.nav-btn {
  background: #3498db;
  color: white;
  border: none;
  padding: 12px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s ease;
  font-size: 0.95em;
}

.nav-btn:hover {
  background: #2980b9;
  transform: translateY(-1px);
}

.nav-btn.active {
  background: #27ae60;
}

.logout-btn {
  position: absolute;
  top: 20px;
  left: 20px;
  background: #e74c3c;
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
}

.logout-btn:hover {
  background: #c0392b;
}

.login-form {
  max-width: 400px;
  margin: 0 auto;
  background: white;
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.login-form h2 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 10px;
}

.login-form p {
  text-align: center;
  color: #7f8c8d;
  margin-bottom: 30px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #34495e;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 2px solid #ecf0f1;
  border-radius: 6px;
  font-size: 16px;
  transition: border-color 0.3s ease;
  box-sizing: border-box;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: #3498db;
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.form-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.form-row .form-group {
  flex: 1;
  min-width: 250px;
}

.btn {
  background: #27ae60;
  color: white;
  border: none;
  padding: 14px 28px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  width: 100%;
  transition: all 0.3s ease;
}

.btn:hover:not(:disabled) {
  background: #229954;
  transform: translateY(-1px);
}

.btn:disabled {
  background: #bdc3c7;
  cursor: not-allowed;
  transform: none;
}

.btn.btn-secondary {
  background: #95a5a6;
}

.btn.btn-secondary:hover:not(:disabled) {
  background: #7f8c8d;
}

.btn.btn-small {
  padding: 6px 12px;
  font-size: 14px;
  width: auto;
}

.btn.btn-primary {
  background: #3498db;
}

.btn.btn-primary:hover:not(:disabled) {
  background: #2980b9;
}

.btn.btn-danger {
  background: #e74c3c;
}

.btn.btn-danger:hover:not(:disabled) {
  background: #c0392b;
}

.error {
  background: #f8d7da;
  color: #721c24;
  padding: 12px;
  border-radius: 6px;
  margin: 20px 0;
  border: 1px solid #f5c6cb;
}

.quote-form {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  margin-bottom: 30px;
}

.quote-form h2 {
  color: #2c3e50;
  margin-bottom: 20px;
  text-align: center;
}

.loading {
  text-align: center;
  padding: 50px 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.loading-animation {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 5px solid #ecf0f1;
  border-top: 5px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-text h3 {
  color: #2c3e50;
  margin: 0 0 15px 0;
}

.loading-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.loading-steps .step {
  color: #bdc3c7;
  transition: color 0.3s ease;
}

.loading-steps .step.active {
  color: #27ae60;
  font-weight: 500;
}

.loading-progress {
  margin-top: 30px;
}

.progress-bar {
  width: 100%;
  height: 6px;
  background: #ecf0f1;
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #3498db, #27ae60);
  border-radius: 3px;
  animation: progress 20s ease-in-out;
}

@keyframes progress {
  0% { width: 0%; }
  100% { width: 100%; }
}

.loading-time {
  color: #7f8c8d;
  margin-top: 10px;
  font-style: italic;
}

.quote-result {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  margin-top: 30px;
}

.quote-result h2 {
  color: #27ae60;
  margin-bottom: 20px;
}

.quote-result div {
  white-space: pre-line;
  line-height: 1.6;
  color: #2c3e50;
  font-size: 15px;
}

.quote-actions {
  display: flex;
  gap: 15px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.quote-actions .btn {
  flex: 1;
  min-width: 200px;
}

.feedback-section {
  margin-top: 30px;
  padding: 25px;
  background: #f8f9fa;
  border-radius: 8px;
  border-left: 4px solid #3498db;
}

.feedback-section h3 {
  color: #2c3e50;
  margin-bottom: 15px;
}

.upload-section {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.upload-section h2 {
  color: #2c3e50;
  margin-bottom: 15px;
}

.upload-section p {
  color: #7f8c8d;
  margin-bottom: 25px;
}

.upload-form {
  margin-bottom: 30px;
}

.file-info {
  color: #27ae60;
  font-style: italic;
  margin-top: 8px;
}

.upload-status {
  padding: 15px;
  border-radius: 6px;
  margin: 20px 0;
}

.upload-status.success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.upload-status.error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.parse-results {
  margin-top: 15px;
  padding: 15px;
  background: rgba(255,255,255,0.5);
  border-radius: 4px;
}

.parse-results ul {
  margin: 10px 0;
  padding-left: 20px;
}

.recent-uploads {
  margin: 30px 0;
}

.recent-uploads h3 {
  color: #2c3e50;
  margin-bottom: 15px;
}

.uploads-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.upload-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  background: #f8f9fa;
  border-radius: 6px;
  border-left: 4px solid #3498db;
}

.upload-name {
  font-weight: 500;
  color: #2c3e50;
  flex: 1;
}

.upload-status {
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.9em;
}

.upload-type {
  background: #ecf0f1;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.85em;
  color: #34495e;
}

.upload-date {
  color: #7f8c8d;
  font-size: 0.9em;
}

.materials-overview {
  margin-top: 30px;
}

.materials-overview h3 {
  color: #2c3e50;
  margin-bottom: 15px;
}

.materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 15px;
}

.material-item {
  padding: 15px;
  background: #f8f9fa;
  border-radius: 8px;
  border-left: 4px solid #27ae60;
}

.material-item strong {
  color: #2c3e50;
  display: block;
  margin-bottom: 8px;
}

.material-item .price {
  color: #27ae60;
  font-weight: 500;
  display: block;
  margin-bottom: 4px;
}

.material-item .category {
  color: #3498db;
  font-size: 0.9em;
  display: block;
  margin-bottom: 4px;
}

.material-item .supplier {
  color: #7f8c8d;
  font-size: 0.85em;
}

.more-items {
  text-align: center;
  color: #7f8c8d;
  font-style: italic;
  margin-top: 15px;
}

.pricing-management-section {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.pricing-management-section h2 {
  color: #2c3e50;
  margin-bottom: 15px;
}

.pricing-management-section p {
  color: #7f8c8d;
  margin-bottom: 25px;
}

.category-selector {
  margin-bottom: 30px;
}

.category-selector label {
  display: block;
  margin-bottom: 8px;
  color: #34495e;
  font-weight: 500;
}

.category-selector select {
  width: 100%;
  max-width: 400px;
  padding: 12px;
  border: 2px solid #ecf0f1;
  border-radius: 6px;
  font-size: 16px;
}

.add-price-form {
  margin-bottom: 40px;
  padding: 25px;
  background: #f8f9fa;
  border-radius: 8px;
  border-left: 4px solid #27ae60;
}

.add-price-form h3 {
  color: #2c3e50;
  margin-bottom: 20px;
}

.prices-list {
  margin-top: 30px;
}

.prices-list h3 {
  color: #2c3e50;
  margin-bottom: 20px;
}

.prices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 20px;
}

.price-item {
  padding: 20px;
  background: white;
  border-radius: 8px;
  border: 1px solid #ecf0f1;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
  transition: box-shadow 0.3s ease;
}

.price-item:hover {
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.price-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid #ecf0f1;
}

.price-header strong {
  color: #2c3e50;
  font-size: 1.1em;
}

.price-value {
  color: #27ae60;
  font-weight: bold;
  font-size: 1.1em;
}

.price-details {
  margin-bottom: 15px;
}

.price-details p {
  margin: 5px 0;
  color: #34495e;
  font-size: 0.95em;
}

.price-date {
  color: #7f8c8d;
  font-size: 0.85em;
  margin-bottom: 15px;
}

.price-actions {
  display: flex;
  gap: 10px;
}

.edit-form {
  border: 2px solid #3498db;
  border-radius: 8px;
  padding: 15px;
  background: #f8f9fa;
}

.edit-actions {
  display: flex;
  gap: 10px;
  margin-top: 15px;
}

.no-data {
  text-align: center;
  padding: 40px 20px;
  color: #7f8c8d;
  font-style: italic;
}

.usage-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.usage-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: white;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.stat-card h3 {
  color: #2c3e50;
  margin-bottom: 15px;
  font-size: 1.2em;
}

.budget-info p,
.token-info p,
.general-info p {
  margin: 8px 0;
  color: #34495e;
}

.budget-bar,
.token-bar {
  width: 100%;
  height: 12px;
  background: #ecf0f1;
  border-radius: 6px;
  overflow: hidden;
  margin: 10px 0;
}

.budget-fill,
.token-fill {
  height: 100%;
  transition: width 0.3s ease;
  border-radius: 6px;
}

.budget-percent,
.token-percent {
  font-weight: 500;
  color: #2c3e50;
}

.warning-level {
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
  font-size: 0.9em;
}

.warning-level.low {
  background: #d4edda;
  color: #155724;
}

.warning-level.medium {
  background: #fff3cd;
  color: #856404;
}

.warning-level.high {
  background: #f8d7da;
  color: #721c24;
}

.refresh-section {
  text-align: center;
  margin-top: 30px;
  padding: 20px;
  background: #f8f9fa;
  border-radius: 8px;
}

.last-update {
  color: #7f8c8d;
  font-size: 0.9em;
  margin-top: 15px;
}

.loading-usage {
  text-align: center;
  padding: 50px 20px;
  color: #7f8c8d;
}

@media (max-width: 768px) {
  .container {
    padding: 15px;
  }
  
  .header {
    padding: 15px;
  }
  
  .ai-budget-bar {
    position: static;
    margin-top: 15px;
    justify-content: center;
  }
  
  .logout-btn {
    position: static;
    margin-bottom: 15px;
  }
  
  .nav-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .nav-btn {
    width: 100%;
    max-width: 300px;
  }
  
  .form-row {
    flex-direction: column;
  }
  
  .form-row .form-group {
    min-width: auto;
  }
  
  .quote-actions {
    flex-direction: column;
  }
  
  .quote-actions .btn {
    min-width: auto;
  }
  
  .prices-grid {
    grid-template-columns: 1fr;
  }
  
  .usage-overview {
    grid-template-columns: 1fr;
  }
  
  .materials-grid {
    grid-template-columns: 1fr;
  }
}