* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

.calculator-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.calculator-header {
    text-align: center;
    margin-bottom: 30px;
}

.calculator-header h1 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 2.2em;
}

.calculator-header p {
    color: #7f8c8d;
    font-size: 1.1em;
}

.calculator-form {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    border: 1px solid #e9ecef;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: #3498db;
}

.calculate-button {
    width: 100%;
    background: #2ecc71;
    color: white;
    padding: 15px;
    border: none;
    border-radius: 6px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
}

.calculate-button:hover {
    background: #27ae60;
}

.results-section {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    border: 1px solid #e9ecef;
    text-align: center;
}

.results-section h3 {
    color: #2c3e50;
    margin-bottom: 20px;
}

.result-box {
    display: inline-block;
    text-align: center;
}

.monthly-payment {
    margin-bottom: 15px;
}

.amount {
    font-size: 2.5em;
    font-weight: bold;
    color: #2ecc71;
    display: block;
}

.label {
    color: #7f8c8d;
    font-size: 1.1em;
}

.plan-recommendation {
    color: #34495e;
    font-size: 1.1em;
}

.advantages-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.advantage-box {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    border: 1px solid #e9ecef;
}

.advantage-box h4 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.2em;
}

.advantage-box ul {
    list-style: none;
}

.advantage-box li {
    margin-bottom: 10px;
    padding-left: 0;
}

.how-it-works {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    border: 1px solid #e9ecef;
}

.how-it-works h3 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.step {
    text-align: center;
}

.step-number {
    background: #3498db;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    font-weight: bold;
}

/* Responsive Design */
@media (max-width: 768px) {
    .advantages-container {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .calculator-container {
        padding: 15px;
    }
}