body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.calculator-container {
    background-color: white;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;
}

h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 25px;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #2c3e50;
}

input[type="range"] {
    width: 100%;
    margin-bottom: 10px;
}

.range-values {
    display: flex;
    justify-content: space-between;
    font-size: 0.9em;
    color: #666;
}

#currentArea {
    font-weight: bold;
}

.price-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gape: 10px;
}

.price-options label {
    display: flex;
    align-items: center;
    font-weight: normal;
    padding: 8px;
    background: #f0f0f0;
    border-radius: 4px;
}

.price-options input {
    margin-right: 8px;
}

select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 12px 20px;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

.result {
    margin-top: 30px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 4px;
    display: none;
}

.result h2 {
    color: #2c3e50;
    text-align: center;
    margin-top: 0;
}

#price {
    color: #27ae60;
}

.details {
    margin-top: 15px;
}

.details p {
    margin: 8px 0;
    display: flex;
    justify-content: space-between;
}

.details span {
    font-weight: normal;
}