body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background: #8b5a2b;
    background-image:
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(0deg, rgba(0,0,0,0.1) 1px, transparent 1px);
    background-size: 30px 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    color: #fff;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.7);
    margin-bottom: 20px;
}

.container {
    display: grid;
    grid-template-columns: repeat(4, 70px);
    gap: 6px;
    background: url('https://www.publicdomainpictures.net/pictures/30000/nahled/wood-texture-3.jpg') center/cover;
    padding: 20px;
    border: 8px solid #5a3714;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.tile {
    width: 70px;
    height: 70px;
    color: white;
    border: 2px solid #3a230f;
	background-color:#5a3714;
    border-radius: 5px;
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    line-height: 70px;
    cursor: pointer;
    user-select: none;
    text-shadow: 1px 1px 2px black;
    transition: transform 0.2s;
}

.tile.empty {
    background: transparent;
    border: 2px dashed #5a3714;
    cursor: default;
}

.buttons {
    margin-top: 20px;
    text-align: center;
}

button {
    margin: 5px;
    padding: 8px 16px;
    font-size: 16px;
    border: none;
    background: #5a3714;
    color: #fff;
    cursor: pointer;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

button:hover {
    background: #7a4e20;
}

#message {
    margin-top: 10px;
    font-weight: bold;
    color: yellow;
}