body {
    font-family: sans-serif;
    background-color: #f4f7f6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

.calculator-container {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

h1 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 20px;
}

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

label {
    display: block;
    font-size: 1rem;
    color: #555;
    margin-bottom: 8px;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    box-sizing: border-box;
}

input[type="number"]:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
}

button {
    width: 100%;
    padding: 14px;
    background-color: #007bff;
    color: #fff;
    font-size: 1.1rem;
    font-weight: bold;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #0056b3;
}

.results-container {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px dashed #eee;
    text-align: left;
}

.results-container h2 {
    font-size: 1.25rem;
    color: #444;
    margin-bottom: 10px;
}

.results-container p {
    font-size: 1.1rem;
    color: #333;
    margin: 8px 0;
}

.results-container span {
    font-weight: bold;
    color: #212529;
}