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

body {
    background-color: #0a0a0a;
    color: #33ff33;
    font-family: 'Press Start 2P', cursive;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

.game-container {
    text-align: center;
    padding: 20px;
    background-color: #1a1a1a;
    border: 4px solid #33ff33;
    box-shadow: 0 0 20px rgba(51, 255, 51, 0.5);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 20px rgba(51, 255, 51, 0.3); }
    to { box-shadow: 0 0 30px rgba(51, 255, 51, 0.6); }
}

.game-title {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 0px #1a8f1a;
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.game-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 14px;
}

.score-container, .high-score-container {
    background-color: #0a0a0a;
    padding: 10px;
    border: 2px solid #33ff33;
}

.difficulty-container {
    margin-bottom: 20px;
}

.difficulty-btn {
    font-family: 'Press Start 2P', cursive;
    font-size: 12px;
    padding: 10px 20px;
    margin: 0 5px;
    background-color: #1a1a1a;
    color: #33ff33;
    border: 2px solid #33ff33;
    cursor: pointer;
    transition: all 0.3s;
}

.difficulty-btn:hover {
    background-color: #33ff33;
    color: #0a0a0a;
    transform: scale(1.1);
}

.difficulty-btn.active {
    background-color: #33ff33;
    color: #0a0a0a;
}

#gameCanvas {
    border: 4px solid #33ff33;
    background-color: #0a0a0a;
    display: block;
    margin: 0 auto;
    image-rendering: pixelated;
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #1a1a1a;
    border: 4px solid #ff3333;
    padding: 30px;
    text-align: center;
    animation: shake 0.5s;
}

.game-over.hidden {
    display: none;
}

@keyframes shake {
    0%, 100% { transform: translate(-50%, -50%) rotate(0deg); }
    25% { transform: translate(-52%, -50%) rotate(-1deg); }
    75% { transform: translate(-48%, -50%) rotate(1deg); }
}

.game-over h2 {
    color: #ff3333;
    margin-bottom: 20px;
    font-size: 24px;
}

.restart-btn {
    font-family: 'Press Start 2P', cursive;
    font-size: 14px;
    padding: 15px 30px;
    background-color: #33ff33;
    color: #0a0a0a;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

.restart-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(51, 255, 51, 0.8);
}

.controls-info {
    margin-top: 20px;
    font-size: 10px;
    line-height: 1.8;
    opacity: 0.7;
}

.sound-toggle {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 24px;
    background: none;
    border: none;
    cursor: pointer;
    transition: transform 0.2s;
}

.sound-toggle:hover {
    transform: scale(1.2);
}

.sound-toggle.muted {
    opacity: 0.5;
}