body {
    font-family: Arial, sans-serif;
    background-color: background-color: #dbe3d9;
background-image: url("data:image/svg+xml,%3Csvg width='100' height='20' viewBox='0 0 100 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M21.184 20c.357-.13.72-.264 1.088-.402l1.768-.661C33.64 15.347 39.647 14 50 14c10.271 0 15.362 1.222 24.629 4.928.955.383 1.869.74 2.75 1.072h6.225c-2.51-.73-5.139-1.691-8.233-2.928C65.888 13.278 60.562 12 50 12c-10.626 0-16.855 1.397-26.66 5.063l-1.767.662c-2.475.923-4.66 1.674-6.724 2.275h6.335zm0-20C13.258 2.892 8.077 4 0 4V2c5.744 0 9.951-.574 14.85-2h6.334zM77.38 0C85.239 2.966 90.502 4 100 4V2c-6.842 0-11.386-.542-16.396-2h-6.225zM0 14c8.44 0 13.718-1.21 22.272-4.402l1.768-.661C33.64 5.347 39.647 4 50 4c10.271 0 15.362 1.222 24.629 4.928C84.112 12.722 89.438 14 100 14v-2c-10.271 0-15.362-1.222-24.629-4.928C65.888 3.278 60.562 2 50 2 39.374 2 33.145 3.397 23.34 7.063l-1.767.662C13.223 10.84 8.163 12 0 12v2z' fill='%230fe08a' fill-opacity='0.4' fill-rule='evenodd'/%3E%3C/svg%3E");#e0f7e9;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: #c8f0d4;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 5px 5px 15px #aaaaaa;
    text-align: center;
    max-width: 400px;
    width: 100%;
}

input[type="number"] {
    width: 80%;
    padding: 10px;
    margin: 10px 0;
    border-radius: 10px;
    border: 1px solid #999;
    box-shadow: inset 2px 2px 5px #aaaaaa;
}

button {
    background-color: #96d7a8;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: 2px 2px 10px #888888;
}

button:hover {
    background-color: #7fc594;
}

.result {
    margin-top: 20px;
    font-size: 1.2em;
    color: #333;
}