* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Roboto', sans-serif;
    background-color: #1a1a1a;
    color: #e0e0e0;
    line-height: 1.6;
    padding: 20px;
  }
  
  .container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    background-color: #2a2a2a;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  }
  
  h1 {
    text-align: center;
    color: #ffffff;
    margin-bottom: 30px;
    font-size: 2.2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
  }
  
  h2 {
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 15px;
  }
  
  /* Last Updated Section */
  .last-updated {
    background-color: #3a3a3a;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
  }
  
  .last-updated p {
    font-size: 1rem;
    color: #b0b0b0;
    margin: 5px 0;
  }
  
  .last-updated .update-note {
    font-size: 0.9rem;
    color: #888;
  }
  
  /* Current Prices Section */
  .current-prices {
    background-color: #3a3a3a;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
  }
  
  .price-dates {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
  }
  
  .price-dates p {
    font-size: 1rem;
    margin: 5px 0;
    font-weight: 500;
  }
  
  .price-dates .min-price {
    color: #ff4d4f; /* Red for min price */
  }
  
  .price-dates .max-price {
    color: #4da8da; /* Blue for max price */
  }
  
  .price-dates .avg-price {
    color: #2ecc71; /* Green for average price */
  }
  
  /* Chart Section */
  .chart-container {
    background-color: #3a3a3a;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
  }
  
  .chart-container canvas {
    max-width: 100%;
  }
  
  /* Store Item */
  .store-item {
    background-color: #3a3a3a;
    padding: 20px;
    margin: 15px 0;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }
  
  .store-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
  }
  
  .store-item h2 {
    margin: 0 0 10px;
    color: #4da8da;
    font-size: 1.5rem;
    font-weight: 500;
  }
  
  .price {
    font-size: 1.3rem;
    color: #2ecc71;
    margin: 5px 0;
    font-weight: 500;
  }
  
  .history {
    margin-top: 15px;
  }
  
  .history strong {
    color: #e0e0e0;
    font-size: 1.1rem;
  }
  
  .history ul {
    list-style: none;
    padding: 0;
    margin-top: 5px;
  }
  
  .history li {
    font-size: 0.95rem;
    color: #b0b0b0;
    margin: 5px 0;
  }
  
  .loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #4da8da;
    border-top: 4px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
  #storeList p {
    text-align: center;
    color: #b0b0b0;
    font-size: 1.1rem;
  }
  
  footer {
    text-align: center;
    margin-top: 30px;
    padding: 10px 0;
    color: #b0b0b0;
    font-size: 0.9rem;
    border-top: 1px solid #3a3a3a;
  }
  
  @media (max-width: 600px) {
    .container {
      padding: 15px;
    }
  
    h1 {
      font-size: 1.8rem;
    }
  
    .last-updated, .store-item, .chart-container, .current-prices {
      padding: 15px;
    }
  
    .store-item h2, .chart-container h2, .current-prices h2 {
      font-size: 1.3rem;
    }
  
    .price {
      font-size: 1.1rem;
    }
  
    .price-dates p {
      font-size: 0.9rem;
    }
  }