body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: #f4f7f6;
  color: #333;
  margin: 0;
  padding: 20px;
}

h1 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 20px;
}

.date-selection {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
  gap: 10px;
}

.date-selection label {
  font-size: 1.1em;
  font-weight: bold;
  color: #555;
}

.date-selection input[type="date"] {
  padding: 8px;
  font-size: 1em;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.product-tabs {
  display: flex;
  justify-content: center;
  margin-bottom: 30px;
  border-bottom: 2px solid #ddd;
}

.tab-btn {
  padding: 10px 20px;
  font-size: 1.1em;
  border: none;
  background-color: transparent;
  cursor: pointer;
  margin: 0 5px;
  transition: all 0.3s ease;
  border-bottom: 3px solid transparent;
}

.tab-btn.active, .tab-btn:hover {
  color: #3498db;
  border-bottom-color: #3498db;
}

#data-container {
  max-width: 1200px;
  margin: 0 auto;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  overflow-x: auto; /* For responsive tables */
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th, .data-table td {
  padding: 12px 15px;
  border-bottom: 1px solid #eee;
}

.data-table thead th {
  background-color: #f8f8f8;
  font-weight: bold;
  color: #333;
  text-transform: uppercase;
  font-size: 0.9em;
}

.data-table tbody tr:hover {
  background-color: #f5f5f5;
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.market-group-header {
  background-color: #e9ecef;
  font-weight: bold;
  color: #2c3e50;
  text-align: center;
}