.sb-calculator {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 900px;
  margin: auto;
}

.sb-left, .sb-right {
  background: #fff;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,.08);
}

.sb-left label {
  display: block;
  margin-top: 15px;
  font-weight: 600;
}

.sb-left select {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
}

.sb-buttons button {
  padding: 8px 14px;
  margin: 5px 5px 0 0;
  border-radius: 20px;
  border: 1px solid #ccc;
  background: #312f2f !important;
  cursor: pointer;
}

.sb-buttons button.active {
  background: #00754a;
  color: #fff;
}

@media(max-width:768px){
  .sb-calculator {
    grid-template-columns: 1fr;
  }
}

.sb-buttons button {
    background-color: #312f2f !important;
}