.calculator-powertoratio-container {
  background: #fff;
  padding: 35px 30px;
  border-radius: 14px;
  max-width: 80%;
  margin: 20px auto;
  box-shadow: 0 14px 36px rgba(0,0,0,0.12);
  font-family: 'Inter', Arial, sans-serif;
}

.calculator-powertoratio-container h2 {
  text-align: center;
  margin-bottom: 25px;
  color: #0d6efd;
  font-size: 1.8em;
}

.ptc-input-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

.ptc-input-group label {
  margin-bottom: 6px;
  font-weight: 600;
  color: #333;
}

.ptc-input, .ptc-output {
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #ccc;
  font-size: 1em;
  transition: all 0.3s ease;
}

.ptc-input:focus {
  border-color: #0d6efd;
  box-shadow: 0 0 8px rgba(13, 110, 253, 0.2);
  background-color: #f5f8ff;
}

.ptc-output {
  background: #f0f3f7;
}

.ptc-button-group {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.ptc-btn {
  flex: 1;
  padding: 12px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, #0d6efd, #4e73df);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.ptc-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(78, 115, 223, 0.35);
}

.ptc-result-text {
  margin-top: 22px;
  font-weight: 600;
  color: #0d6efd;
  text-align: center;
  font-size: 1.05em;
}