body {
  background-color: #121212;
  color: #e0e0e0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0; padding: 0;
}

header {
  background-color: #1f1f1f;
  padding: 1rem;
  text-align: center;
  border-bottom: 2px solid #4caf50;
}

h1 {
  margin: 0;
  font-weight: 700;
  color: #4caf50;
}

#last-update {
  margin-top: 5px;
  font-size: 0.9rem;
  color: #a0a0a0;
}

main {
  padding: 1rem;
  max-width: 900px;
  margin: 0 auto;
}

.prices {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.card {
  background-color: #1e1e1e;
  border-radius: 10px;
  padding: 1rem 2rem;
  width: 200px;
  text-align: center;
  box-shadow: 0 0 10px #4caf50aa;
}

.price {
  font-size: 2rem;
  margin: 0.5rem 0;
  font-weight: 700;
  color: #4caf50;
}

.change {
  font-size: 1rem;
}

.change.positive {
  color: #00ff00;
}

.change.negative {
  color: #ff4444;
}

.chart-section {
  background-color: #1e1e1e;
  padding: 1rem;
  border-radius: 10px;
  box-shadow: 0 0 10px #4caf50aa;
  margin-bottom: 2rem;
}

.table-section {
  background-color: #1e1e1e;
  padding: 1rem;
  border-radius: 10px;
  box-shadow: 0 0 10px #4caf50aa;
}

table {
  width: 100%;
  border-collapse: collapse;
  color: #e0e0e0;
}

th, td {
  padding: 0.7rem;
  text-align: left;
  border-bottom: 1px solid #333;
}

th {
  background-color: #272727;
}