.supplement-calculator {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 1px;
    font-family: Arial, sans-serif;
}
.supplement-calculator h3 {
    margin-top: 0;
    color: #333;
}
.supplement-calculator table { 
  	width: 100%;
    border-collapse: collapse;
    margin-bottom: 15px;
}
.supplement-calculator th, .supplement-calculator td {
  	padding: 10px;
    border: 1px solid #ddd;
    text-align: left;
}
.supplement-calculator th {
  	
    background-color: #f4f4f4;
}

.supplement-calculator input, .supplement-calculator select {
  	width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}
.supplement-calculator button {
    
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

.supplement-calculator .result {
    margin-top: 15px;
    font-size: 16px;
    color: #333;
}
.supplement-calculator .error {
    color: red;
    font-size: 14px;
}