.tc-calc-container {
  font-family: Arial, sans-serif;
  background: #fff;
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  max-width: 300px;
  margin: 0 auto;
  text-align: center;
}
.tc-calc-container h2 {
  font-size: 1.4em;
  margin: 0 0 10px;
  color: #333;
}
.tc-calc-container p {
  font-size: 0.85em;
  color: #666;
  margin: 5px 0;
}
.tc-calc-select, .tc-calc-button {
  width: 100%;
  padding: 8px;
  margin: 8px 0;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 0.9em;
  box-sizing: border-box;
}
.tc-calc-button {
  background: #4CAF50;
  color: #fff;
  border: none;
  cursor: pointer;
}
.tc-calc-button:hover {
  background: #45a049;
}
.tc-calc-result {
  font-weight: bold;
  color: #333;
  margin-top: 10px;
}