body {
  font-family: 'Segoe UI', sans-serif;
  background: #1c1c1c;
  color: #f1f1f1;
  padding: 20px;
  text-align: center;
}

h1 {
  color: #00e3aa;
}

select, input, button {
  padding: 10px;
  font-size: 16px;
  margin: 5px;
  border-radius: 5px;
  border: 1px solid #444;
  background-color: #2c2c2c;
  color: white;
}

button {
  background-color: #00e3aa;
  cursor: pointer;
}

.price-box {
  background-color: #292929;
  margin: 20px auto;
  padding: 20px;
  width: 320px;
  border-radius: 10px;
  border: 1px solid #444;
}

.price {
  font-size: 32px;
  color: #00ffcc;
  word-break: break-word;
}

.signal {
  margin-top: 20px;
  font-size: 20px;
  padding: 10px;
  border-radius: 5px;
  display: inline-block;
}

.buy {
  background-color: #005f3c;
  color: #aaffdd;
}

.sell {
  background-color: #5f0000;
  color: #ffcccc;
}