:root {
    --background-color: #f0f0f0;
    --text-color: #000;
    --number-bg-color: #fff;
    --number-border-color: #ccc;
}

body.dark-mode {
    --background-color: #333;
    --text-color: #fff;
    --number-bg-color: #555;
    --number-border-color: #888;
}

body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--background-color);
    color: var(--text-color);
}

#theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 10px;
    cursor: pointer;
}

.container {
    text-align: center;
}

.menu-container {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.menu-item {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--number-bg-color);
    border: 2px solid var(--number-border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
}

button {
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
}