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

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

.container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

canvas {
    display: block;
    background: linear-gradient(to bottom, #87CEEB 0%, #E0F6FF 100%);
    border: 3px solid #333;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.hud {
    display: flex;
    justify-content: center;
}

.score-board {
    background: rgba(255, 255, 255, 0.9);
    padding: 15px 30px;
    border-radius: 10px;
    font-size: 24px;
    font-weight: bold;
    color: #333;
    min-width: 150px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.score-board span:last-child {
    color: #667eea;
    margin-left: 10px;
}

.game-over-screen {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    border-radius: 10px;
    backdrop-filter: blur(5px);
}

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

.game-over-content {
    background: white;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.game-over-content h1 {
    font-size: 48px;
    color: #ff6b6b;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.game-over-content p {
    font-size: 28px;
    color: #333;
    margin-bottom: 30px;
    font-weight: bold;
}

.game-over-content p span {
    color: #667eea;
}

.restart-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 40px;
    font-size: 20px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.restart-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 20px rgba(102, 126, 234, 0.6);
}

.restart-btn:active {
    transform: translateY(0);
}