body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
}

.game-container {
    text-align: center;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.options-list {
    list-style-type: none;
    padding: 0;
}

.options-list li {
    background: #ececec;
    padding: 15px;
    margin: 10px 0;
    cursor: pointer;
    border-radius: 5px;
    transition: background 0.3s;
}

.options-list li:hover {
    background: #dcdcdc;
}

#try-again-btn, #play-again-btn {
    display: none;
    margin-top: 20px;
    padding: 10px 20px;
    background: red;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#play-again-btn {
    background: orange;
    display: none;
}

.checkmark, .cross {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;
    color: white;
    font-size: 24px;
    margin-left: 10px;
}

.checkmark {
    background: green;
    animation: expand 0.5s forwards;
}

.cross {
    background: red;
    animation: shake 0.5s;
}

@keyframes shake {
    0% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    50% { transform: translateX(5px); }
    75% { transform: translateX(-5px); }
    100% { transform: translateX(0); }
}

@keyframes expand {
    0% { transform: scale(1); }
    50% { transform: scale(3.5); }
    100% { transform: scale(1); }
}

.alert {
    display: none;
    background: orange;
    padding: 20px;
    margin-top: 20px;
    border-radius: 5px;
    color: white;
    font-weight: bold;
}