:root {
  --primary: #2c3e50;
  --secondary: #3498db;
  --success: #27ae60;
  --danger: #e74c3c;
  --light: #ecf0f1;
  --dark: #2c3e50;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background-color: #f5f7fa;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  background-color: var(--primary);
  color: white;
  padding: 1rem;
  text-align: center;
}

.app-footer {
  background-color: var(--primary);
  color: white;
  padding: 1rem;
  text-align: center;
  margin-top: auto;
}

.query-container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.query-form {
  margin: 2rem 0;
}

.input-group {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.input-group input {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

.input-group button {
  padding: 0 1.5rem;
  background-color: var(--secondary);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
}

.input-group button:disabled {
  background-color: #95a5a6;
  cursor: not-allowed;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1rem 0;
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.results-viewer {
  margin-top: 2rem;
  background: white;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.sources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.source-card {
  border: 1px solid #eee;
  padding: 1rem;
  border-radius: 4px;
  background: white;
}

.similarity-badge {
  background: var(--light);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
  display: inline-block;
}

.error-message {
  color: var(--danger);
  padding: 1rem;
  background: #fadbd8;
  border-radius: 4px;
  margin: 1rem 0;
}

.examples {
  margin-top: 2rem;
}

.examples ul {
  list-style: none;
  padding: 0;
}

.examples li {
  padding: 0.5rem;
  cursor: pointer;
  color: var(--secondary);
}

.examples li:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .input-group {
    flex-direction: column;
  }

  .input-group input,
  .input-group button {
    width: 100%;
  }

  .input-group button {
    padding: 0.75rem;
  }

  .status-indicator {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .app-header,
  .app-footer {
    font-size: 1rem;
    padding: 0.75rem;
  }

  .results-viewer {
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .query-container {
    padding: 0 0.5rem;
  }

  .similarity-badge {
    font-size: 0.7rem;
  }

  .examples li {
    font-size: 0.9rem;
  }
}

@media (max-width: 768px) {
  .input-group {
    flex-direction: column;
  }

  .input-group input,
  .input-group button {
    width: 100%;
  }

  .input-group button {
    padding: 0.75rem;
  }

  .status-indicator {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .app-header,
  .app-footer {
    font-size: 1rem;
    padding: 0.75rem;
  }

  .results-viewer {
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .query-container {
    padding: 0 0.5rem;
  }

  .similarity-badge {
    font-size: 0.7rem;
  }

  .examples li {
    font-size: 0.9rem;
  }
}