body {
    font-family: Arial, sans-serif;
    background-color: #1a1a1a;
    color: #f0f0f0;
    margin: 20px;
}

h1 {
    color: #007bff; /* Màu xanh nổi bật */
    text-align: center;
}

.game-item {
    background-color: #2c2c2c;
    border: 1px solid #444;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.game-item h3 {
    margin: 0;
    font-size: 1.1em;
}

button {
    background-color: #28a745; /* Màu xanh lá cây */
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #218838;
}

#result {
    margin-top: 30px;
    padding: 15px;
    background-color: #1e7e34; /* Nền thông báo */
    border-radius: 5px;
    text-align: center;
}