body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #2c3e50;
    font-family: Arial, sans-serif;
}

.game-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#chessCanvas {
    border: 4px solid #34495e;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
}

.instructions {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: rgba(44, 62, 80, 0.9);
    color: white;
    padding: 15px;
    border-radius: 5px;
    max-width: 300px;
    font-size: 14px;
    line-height: 1.5;
}

.menu {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(44, 62, 80, 0.95);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
}

.menu h1 {
    color: white;
    margin-bottom: 30px;
    font-size: 2.5em;
}

.menu button {
    display: block;
    width: 200px;
    padding: 15px;
    margin: 10px auto;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.menu button:hover {
    background-color: #2980b9;
}

.menu button:active {
    transform: scale(0.98);
}