.calc-fagerstrom-container {
    max-width: 400px;
    margin: auto;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    font-family: Arial, sans-serif;
}

.calc-fagerstrom-container h2 {
    text-align: center;
    color: #333;
}

.calc-fagerstrom-container label {
    font-weight: bold;
    margin-top: 10px;
    display: block;
}

.calc-fagerstrom-container select,
.calc-fagerstrom-container button {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border-radius: 5px;
    border: 1px solid #ccc;
}

.calc-fagerstrom-container button {
    background: #007bff;
    color: white;
    font-size: 16px;
    cursor: pointer;
    border: none;
}

.calc-fagerstrom-container button:hover {
    background: #0056b3;
}

#fagerstrom-result {
    margin-top: 15px;
    text-align: center;
    font-weight: bold;
}