body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    padding: 20px;
}

.container {
    max-width: 400px;
    margin: 50px auto;
    padding: 20px;
    background: white;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    border-radius: 8px;
    text-align: center;
}

.input-group {
    margin-bottom: 15px;
}

input[type="text"],
input[type="number"] {
    width: 94%;
    padding: 10px;
    border-radius: 5px;
    border: 2px solid #ddd;
    font-size: 16px;
    text-align: center;
}

input[type="text"]:focus,
input[type="number"]:focus {
    border-color: #0056b3;
    outline: none;
}

.button-group {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}

button {
    flex-grow: 1;
    margin: 0 3px;
    padding: 10px;
    font-size: 16px;
    border: none;
    color: white;
    background-color: #007bff;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.result {
    margin-top: 20px;
    padding: 10px;
    background: #e9ecef;
    border: 1px solid #ccc;
    border-radius: 5px;
}