body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #f5f6fa;
  color: #333;
  scroll-behavior: smooth;
}

#app {
  display: flex;
  height: 100vh;
}

aside {
  width: 220px;
  background-color: #2f3640;
  color: white;
  padding: 20px;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  overflow-y: auto;
}

main {
  flex: 1;
  margin-left: 240px; /* because sidebar is fixed */
  padding: 20px;
  overflow-y: auto;
  scroll-behavior: smooth;
}

section {
  min-height: 100vh;
  padding: 40px 20px;
  border-bottom: 1px solid #ccc;
}

.chart-card {
  background-color: #fffaf5;  /* warm neutral tone like your image */
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  margin-bottom: 40px;
}

.chart-card h3 {
  margin-top: 0;
  color: #5a2d00;
  font-size: 1.2rem;
  margin-bottom: 15px;
}

.chart-container {
  position: relative;
  height: 350px;
}

.chart-container1 {
  position: relative;
  height: 550px;
}

.chart-container2 {
  position: relative;
  height: 900px;
}