body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: #f4f7f9;
  color: #333;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background-color: #fff;
  padding: 20px 40px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

h1, h2, h3 {
  color: #2c3e50;
  border-bottom: 2px solid #e0e0e0;
  padding-bottom: 10px;
}

.controls {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.controls input {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 16px;
}

.controls button {
  padding: 10px 20px;
  background-color: #3498db;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.controls button:hover {
  background-color: #2980b9;
}

.hidden {
  display: none;
}

#loading {
  font-size: 18px;
  color: #3498db;
  text-align: center;
  padding: 20px;
}

#error {
  color: #e74c3c;
  background-color: #fbecec;
  border: 1px solid #e74c3c;
  padding: 15px;
  border-radius: 4px;
  margin-top: 20px;
}

.charts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: 20px;
}

@media (min-width: 900px) {
  .charts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}


.chart-container {
  position: relative;
  height: 40vh;
  min-height: 300px;
}

#analysis-summary {
  background-color: #ecf0f1;
  padding: 15px;
  border-radius: 5px;
  line-height: 1.6;
}

#raw-data-container table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
}

#raw-data-container th, #raw-data-container td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: left;
}

#raw-data-container th {
  background-color: #f2f2f2;
}