.calorie-calculator {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}
.calorie-calculator h1, .calorie-calculator h2, .calorie-calculator h3 {
    color: #2c3e50;
}
.calorie-calculator h1 {
    font-size: 28px;
    text-align: center;
}
.calorie-calculator h2 {
    font-size: 22px;
    margin-top: 30px;
}
.calorie-calculator h3 {
    font-size: 18px;
    margin-top: 20px;
}
.calorie-calculator p {
    margin-bottom: 15px;
}
.calorie-calculator table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}
.calorie-calculator th, .calorie-calculator td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
}
.calorie-calculator th {
    background-color: #f0f0f0;
    font-weight: bold;
}
.calorie-calculator .calculator-container {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}
.calorie-calculator .form-group {
    margin-bottom: 15px;
}
.calorie-calculator label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}
.calorie-calculator input, .calorie-calculator select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}
.calorie-calculator .unit-toggle {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}
.calorie-calculator .unit-toggle label {
    flex: 1;
    text-align: center;
    padding: 10px;
    cursor: pointer;
    background-color: #f0f0f0;
    border: 1px solid #ddd;
    margin-right: 5px;
}
.calorie-calculator .unit-toggle input {
    display: none;
}
.calorie-calculator .unit-toggle input:checked + label {
    background-color: #3498db;
    color: white;
    border-color: #3498db;
}
.calorie-calculator button {
    background-color: #3498db;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
}
.calorie-calculator button:hover {
    background-color: #2980b9;
}
.calorie-calculator .result {
    margin-top: 20px;
    padding: 15px;
    background-color: #e8f4f8;
    border-radius: 4px;
    display: none;
}
.calorie-calculator .error {
    color: red;
    font-size: 14px;
    margin-top: 5px;
    display: none;
}
.calorie-calculator .height-inputs {
    display: flex;
    gap: 10px;
}
.calorie-calculator .height-inputs input {
    width: 48%;
}
@media (max-width: 600px) {
    .calorie-calculator {
        padding: 10px;
    }
    .calorie-calculator h1 {
        font-size: 24px;
    }
    .calorie-calculator h2 {
        font-size: 20px;
    }
    .calorie-calculator table {
        font-size: 14px;
    }
    .calorie-calculator .height-inputs {
        flex-direction: column;
    }
    .calorie-calculator .height-inputs input {
        width: 100%;
    }
}