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

body, html {
    width: 100%;
    height: 100%;
    font-family: Arial, sans-serif;
    overflow: hidden;
    background: #000;
}

#container {
    width: 100%;
    height: 100%;
    position: relative;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(8px);
}

.screen.hidden {
    display: none;
}

.screen-content {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border: 1px solid #444444;
    padding: 50px;
    border-radius: 8px;
    text-align: center;
    max-width: 550px;
    color: #FFFFFF;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

h1 {
    font-size: 52px;
    margin-bottom: 15px;
    color: #FFFFFF;
    font-weight: 700;
    letter-spacing: 2px;
}

.subtitle {
    font-size: 16px;
    color: #CCCCCC;
    margin-bottom: 35px;
    font-weight: 300;
}

.instructions {
    font-size: 14px;
    text-align: center;
    margin: 30px 0;
    background: rgba(255, 255, 255, 0.05);
    padding: 25px;
    border-left: 3px solid #FF6B6B;
    border-radius: 5px;
    line-height: 1.8;
}

.instructions p {
    margin: 10px 0;
    color: #DDDDDD;
}

.instructions h3 {
    color: #FFFFFF;
    margin: 15px 0 10px 0;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

button {
    background: linear-gradient(135deg, #FF6B6B 0%, #FF4757 100%);
    color: #FFF;
    border: none;
    padding: 14px 45px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 5px;
    margin: 20px 10px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

button:hover {
    background: linear-gradient(135deg, #FF5252 0%, #FF3838 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(255, 107, 107, 0.3);
}

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

#gameOverStats {
    font-size: 16px;
    margin: 25px 0;
    color: #FFFFFF;
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 5px;
}

#gameOverStats p {
    margin: 10px 0;
    font-weight: 500;
}

.message {
    font-size: 22px;
    color: #FF6B6B;
    margin: 20px 0;
    font-weight: 600;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

#hud {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid #555555;
    padding: 20px;
    color: #FFFFFF;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    border-radius: 5px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
}

#hud div {
    margin: 10px 0;
    display: flex;
    justify-content: space-between;
    min-width: 200px;
}