body {
  background-color: #0b132b;
  color: white;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
}

header {
  margin: 20px 0;
}

main {
  width: 90%;
  margin: 0 auto;
}

.controls {
  margin: 20px 0;
}

select,
button {
  margin: 10px;
  padding: 6px 10px;
  border-radius: 6px;
  border: none;
}

.top-grid {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 20px 0;
  flex-wrap: wrap;
}

.chart-box {
  background-color: #101935;
  border-radius: 12px;
  padding: 20px;
  margin: 20px auto;
  width: 500px;
}

.chart-box-header {
  margin-bottom: 15px;
}

.placeholder {
  background-color: #0b132b;
  border-radius: 8px;
  padding: 40px 20px;
  margin-top: 15px;
}

.placeholder.small {
  padding: 20px;
}

.info-cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 20px 0;
}

.card {
  background-color: #0b132b;
  border-radius: 8px;
  padding: 15px;
  width: 140px;
}

.card-wide {
  width: 300px;
}

.card-number {
  margin-top: 10px;
  font-size: 24px;
  font-weight: bold;
}

.composition-block {
  margin: 20px 0;
}

.metric-control {
  margin-top: 10px;
}

footer {
  margin: 30px 0 20px 0;
  color: #cbd5e1;
}