:root {
    --primary: #4a6cf7;
    --secondary: #6c757d;
    --success: #28a745;
    --light: #f8f9fa;
    --dark: #212529;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.calculator-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 30px;
}

.calculator-container h1 {
    text-align: center;
    color: var(--primary);
    margin-bottom: 20px;
}

.calculator-container .description {
    text-align: center;
    margin-bottom: 30px;
    color: var(--secondary);
}

.calculator-container .step {
    display: none;
    animation: fadeIn 0.5s;
}

.calculator-container .step.active {
    display: block;
}

.calculator-container .form-group {
    margin-bottom: 20px;
}

.calculator-container label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.calculator-container select, 
.calculator-container input, 
.calculator-container textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
}

.calculator-container button {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background-color 0.3s;
}

.calculator-container button:hover {
    background-color: #3a5cd8;
}

.calculator-container .btn-back {
    background-color: var(--secondary);
    margin-right: 10px;
}

.calculator-container .btn-back:hover {
    background-color: #5a6268;
}

.calculator-container .result-box {
    background-color: var(--light);
    padding: 20px;
    border-radius: var(--border-radius);
    margin: 20px 0;
    border-left: 4px solid var(--primary);
}

.calculator-container .price-range {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary);
}

.calculator-container .navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.calculator-container .option-card {
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    padding: 15px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: all 0.3s;
}

.calculator-container .option-card:hover {
    border-color: var(--primary);
    background-color: #f0f4ff;
}

.calculator-container .option-card.selected {
    border-color: var(--primary);
    background-color: #e6eeff;
}

.calculator-container .progress-bar {
    height: 8px;
    background-color: #e9ecef;
    border-radius: 4px;
    margin-bottom: 30px;
    overflow: hidden;
}

.calculator-container .progress {
    height: 100%;
    background-color: var(--primary);
    border-radius: 4px;
    width: 0%;
    transition: width 0.5s;
}

@media (max-width: 768px) {
    .calculator-container {
        padding: 20px;
    }
    
    .calculator-container .navigation {
        flex-direction: column;
    }
    
    .calculator-container .btn-back {
        margin-right: 0;
        margin-bottom: 10px;
    }
}