body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background: repeating-conic-gradient(red 0deg 10deg, yellow 10deg 20deg, blue 20deg 30deg);
    border-radius: 50%;
    font-family: Arial, sans-serif;
}

.game-container {
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    padding: 20px;
}

.puzzle-container {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-gap: 5px;
    width: 300px;
    height: 300px;
}

.tile {
    background: linear-gradient(to bottom, #0055FF, #0099FF);
    color: white;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    user-select: none;
    border-radius: 10px;
}

.tile.empty {
    background: transparent;
    cursor: default;
    pointer-events: none;
}