body {
    margin: 0;
    padding: 0;
    background: #0a0a14;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #fff;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: radial-gradient(ellipse at center, #1a1a3a 0%, #0a0a14 100%);
}

.game-container {
    position: relative;
    width: 100%;
    max-width: 600px;
    text-align: center;
    padding: 20px;
    box-sizing: border-box;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 10px 20px;
    background: rgba(20, 20, 40, 0.6);
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 200, 255, 0.3);
    border: 1px solid rgba(0, 200, 255, 0.3);
}

.header h1 {
    margin: 0;
    font-size: 2rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    background: linear-gradient(to right, #00ccff, #00ffcc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 10px rgba(0, 200, 255, 0.5);
}

.score-container {
    font-size: 1.2rem;
    background: rgba(0, 0, 0, 0.4);
    padding: 8px 15px;
    border-radius: 20px;
    box-shadow: 0 0 10px rgba(0, 200, 255, 0.3);
}

#gameCanvas {
    background: #0c0c1f;
    border-radius: 10px;
    box-shadow: 0 0 30px rgba(0, 150, 255, 0.4);
    border: 1px solid rgba(0, 200, 255, 0.2);
    display: block;
    margin: 0 auto;
}

.controls {
    margin-top: 20px;
    font-size: 0.9rem;
    color: #00ccff;
    text-shadow: 0 0 5px rgba(0, 200, 255, 0.5);
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(10, 10, 30, 0.9);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 0 40px rgba(0, 200, 255, 0.5);
    border: 1px solid rgba(0, 200, 255, 0.5);
    z-index: 10;
}

.game-over h2 {
    margin-top: 0;
    color: #ff3366;
    text-shadow: 0 0 10px rgba(255, 50, 100, 0.7);
    font-size: 2.5rem;
}

.game-over p {
    font-size: 1.2rem;
    margin: 20px 0;
}

#restartBtn {
    background: linear-gradient(to right, #00ccff, #00ffcc);
    border: none;
    padding: 12px 30px;
    font-size: 1.1rem;
    border-radius: 30px;
    cursor: pointer;
    color: #0a0a1a;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 0 20px rgba(0, 200, 255, 0.7);
    transition: all 0.3s ease;
}

#restartBtn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(0, 200, 255, 0.9);
}

.hidden {
    display: none;
}