:root {
    --background-color: #000000;
    --text-color: #e0e0e0;
    --button-background: #333333;
    --button-hover: #444444;
    --border-color: #555555;
    --font-family: 'Arial', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

#menu-container, #shop-container {
    text-align: center;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

#menu-header {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
}

#menu-header button, #shop-container button {
    background-color: var(--button-background);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    cursor: pointer;
    font-size: 1rem;
    border-radius: 5px;
    transition: background-color 0.3s;
}

#menu-header button:hover, #shop-container button:hover {
    background-color: var(--button-hover);
}

#avatar-display {
    margin-top: 20px;
}

#avatar-display img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
}

#coin-count {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.shop-item {
    margin-bottom: 20px;
}