* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
}

.game-container {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #f9ca24);
    background-size: 400% 400%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.score-container {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 1.2em;
    font-weight: bold;
}

.score, .high-score {
    background: rgba(255, 255, 255, 0.2);
    padding: 10px 15px;
    border-radius: 10px;
    backdrop-filter: blur(5px);
}

#gameCanvas {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    background-color: #2c3e50;
    margin: 20px 0;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.controls {
    margin-top: 20px;
}

.control-instructions {
    margin-bottom: 15px;
    font-size: 0.9em;
    opacity: 0.8;
}

.control-instructions p {
    margin: 5px 0;
}

button {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    color: white;
    border: none;
    padding: 12px 20px;
    margin: 0 5px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1em;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 20px rgba(0, 0, 0, 0.3);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    background: #95a5a6;
    cursor: not-allowed;
    transform: none;
}

.game-over-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    z-index: 1000;
}

.game-over-screen.show {
    display: flex;
}

.game-over-screen h2 {
    font-size: 3em;
    margin-bottom: 20px;
    color: #ff6b6b;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.game-over-screen p {
    font-size: 1.5em;
    margin-bottom: 30px;
}

#playAgainBtn {
    font-size: 1.2em;
    padding: 15px 30px;
}

/* Responsive Design */
@media (max-width: 600px) {
    .game-container {
        padding: 20px;
        margin: 10px;
    }
    
    h1 {
        font-size: 2em;
    }
    
    #gameCanvas {
        width: 300px;
        height: 300px;
    }
    
    .score-container {
        flex-direction: column;
        gap: 10px;
    }
    
    button {
        padding: 10px 15px;
        font-size: 0.9em;
        margin: 5px 2px;
    }
}