.nosmoking-calculator-container {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #ffffff;
    padding: 35px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    max-width: 550px;
    width: 100%;
    margin: 20px auto;
    box-sizing: border-box;
    color: #333;
}

.nosmoking-calculator-container * {
    box-sizing: border-box;
}

.nosmoking-calculator-container h2 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 25px;
    font-size: 28px;
    margin-top: 0;
}

.nosmoking-calculator-container .form-group {
    margin-bottom: 18px;
}

.nosmoking-calculator-container .form-row {
    display: flex;
    gap: 15px;
}

.nosmoking-calculator-container .form-group.half {
    flex: 1;
}

.nosmoking-calculator-container label {
    display: block;
    margin-bottom: 6px;
    color: #495057;
    font-weight: 600;
    font-size: 14px;
}

.nosmoking-calculator-container input[type="number"], 
.nosmoking-calculator-container select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ced4da;
    border-radius: 6px;
    font-size: 15px;
    background-color: #fff;
    color: #333;
    transition: border-color 0.2s;
}

.nosmoking-calculator-container input[type="number"]:focus, 
.nosmoking-calculator-container select:focus {
    border-color: #007bff;
    outline: none;
}

.nosmoking-calculator-container button {
    background: linear-gradient(to right, #28a745, #218838);
    color: white;
    padding: 14px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
    font-weight: bold;
    transition: opacity 0.2s ease;
    margin-top: 10px;
}

.nosmoking-calculator-container button:hover {
    opacity: 0.9;
}

.nosmoking-calculator-container .results {
    margin-top: 25px;
    border-top: 2px solid #e9ecef;
    padding-top: 20px;
}

.nosmoking-calculator-container .result-item {
    font-weight: 600;
    margin-bottom: 12px;
    font-size: 15px;
    color: #495057;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nosmoking-calculator-container .green-text {
    color: #28a745;
    font-weight: bold;
}

@media (max-width: 480px) {
    .nosmoking-calculator-container {
        padding: 20px;
    }
    .nosmoking-calculator-container .form-row {
        flex-direction: column;
        gap: 0;
    }
}