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

body {
    background: #000;
    color: #fff;
    font-family: 'Courier New', monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

.game-container {
    text-align: center;
    position: relative;
}

.game-header {
    display: flex;
    justify-content: space-between;
    padding: 10px 20px;
    background: rgba(0, 0, 0, 0.8);
    border: 2px solid #0f0;
    border-bottom: none;
    width: 800px;
    margin: 0 auto;
}

.score, .lives {
    font-size: 20px;
    color: #0f0;
    text-shadow: 0 0 10px #0f0;
}

#gameCanvas {
    border: 2px solid #0f0;
    background: radial-gradient(ellipse at center, #001 0%, #000 100%);
    display: block;
    box-shadow: 0 0 20px #0f0;
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.9);
    border: 2px solid #f00;
    padding: 30px;
    border-radius: 10px;
    z-index: 10;
}

.game-over h2 {
    color: #f00;
    font-size: 36px;
    margin-bottom: 20px;
    text-shadow: 0 0 20px #f00;
}

.game-over p {
    font-size: 20px;
    margin: 10px 0;
}

.hidden {
    display: none;
}

.instructions {
    position: absolute;
    right: -250px;
    top: 50px;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid #0f0;
    padding: 20px;
    border-radius: 5px;
    width: 200px;
}

.instructions h3 {
    color: #0f0;
    margin-bottom: 10px;
    text-shadow: 0 0 10px #0f0;
}

.instructions ul {
    list-style: none;
}

.instructions li {
    margin: 5px 0;
    font-size: 14px;
    color: #ccc;
}