body {
    background-color: #f0f2f5;
    font-family: 'Helvetica Neue', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    text-align: center;
    background-color: #fff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 30px;
}

.numbers-container {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.number {
    width: 60px;
    height: 60px;
    background-color: #4CAF50;
    color: #fff;
    font-size: 2rem;
    font-weight: bold;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#generate-btn {
    background-color: #007bff;
    color: #fff;
    font-size: 1.2rem;
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.4);
}

#generate-btn:hover {
    background-color: #0056b3;
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.5);
}

.language-switcher {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
}

#lang-selector {
    background-color: #f0f0f0;
    border: 1px solid #ccc;
    padding: 5px;
    cursor: pointer;
}