body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #F1F3F4;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 400px;
    margin: auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
}

label {
    font-weight: bold;
    display: block;
    margin-bottom: 5px;
}

input[type="number"],
button {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-bottom: 15px;
    box-sizing: border-box;
}

button {
    background-color: #007bff;
    color: #fff;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #007acc;
}

.result {
    margin-top: 20px;
    font-weight: bold;
}

footer {
    text-align: center;
    font-size: 14px;
    color: #555;
    padding: 20px 0;
    margin-top: auto;
}

.motivation {
    font-style: italic;
    color: #555;
    margin-top: 10px;
}