body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background: linear-gradient(45deg, #00b4db, #0083b0);
}

.game-container {
    text-align: center;
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    width: 90%;
    max-width: 600px;
    position: relative;
}

.header {
    background: #0083b0;
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
}

.score-board, .timer {
    font-size: 1.5em;
}

.game-area {
    position: relative;
    height: 400px;
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    border-top: 1px solid #ddd;
}

.dot {
    width: 20px;
    height: 20px;
    background: #ff5722;
    border-radius: 50%;
    position: absolute;
    cursor: pointer;
}

.start-button {
    background: #00b4db;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.2em;
    cursor: pointer;
    margin: 20px;
    border-radius: 5px;
}

.start-button:hover {
    background: #0083b0;
}

.game-over-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

@media (max-width: 600px) {
    .header {
        flex-direction: column;
        align-items: center;
    }
    .game-area {
        height: 300px;
    }
}