body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: #000;
    font-family: 'Courier New', monospace;
    overflow: hidden;
    touch-action: manipulation;
    position: relative;
}

.background-elements {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

#game-container {
    position: relative;
    width: 100%;
    max-width: 550px;
    aspect-ratio: 550/700;
    z-index: 2;
}

#game-canvas {
    width: 100%;
    height: 100%;
    display: block;
    background: rgba(0, 0, 0, 0.7);
    border: 4px solid #3366ff;
    box-shadow: 0 0 20px #3366ff;
}

#ui {
    position: absolute;
    top: 10px;
    left: 10px;
    color: #fff;
    font-size: 20px;
    text-shadow: 0 0 5px #3366ff;
}

#start-screen, #game-over {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #fff;
    text-align: center;
}

#game-over {
    display: none;
    color: #ff3366;
}

h1 {
    color: #3366ff;
    font-size: 36px;
    margin-bottom: 20px;
    text-shadow: 0 0 10px #3366ff;
}

button {
    background: #3366ff;
    color: white;
    border: none;
    padding: 10px 20px;
    margin-top: 20px;
    font-family: 'Courier New', monospace;
    font-size: 18px;
    cursor: pointer;
    box-shadow: 0 0 10px #3366ff;
    transition: all 0.3s;
}

button:hover {
    background: #4488ff;
    transform: scale(1.05);
}


#mobile-controls {
    display: none;
    position: fixed;
    bottom: 30px;
    left: 0;
    right: 0;
    justify-content: center;
    gap: 40px;
    padding: 10px;
    z-index: 100;
}

.control-btn {
    background: #3366ff;
    color: white;
    border: none;
    border-radius: 50%;
    width: 70px;
    height: 70px;
    font-size: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 0 10px #3366ff;
    user-select: none;
    -webkit-user-select: none;
}

.control-btn:active {
    background: #2255dd;
    transform: scale(0.95);
}


.star {
    position: absolute;
    background-color: white;
    border-radius: 50%;
    z-index: 0;
    pointer-events: none;
    animation: twinkle 3s infinite alternate;
}

.spaceship {
    position: absolute;
    width: 40px;
    height: 40px;
    background-size: contain;
    background-repeat: no-repeat;
    z-index: 1;
    opacity: 0.8;
    pointer-events: none;
    animation: fly 10s linear infinite;
}

@keyframes fly {
    0% {
        transform: translate(0, 0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.8;
    }
    90% {
        opacity: 0.8;
    }
    100% {
        transform: translate(var(--end-pos-x), var(--end-pos-y)) rotate(360deg);
        opacity: 0;
    }
}

@keyframes twinkle {
    0% { opacity: 0.2; }
    100% { opacity: 1; }
}

@media (max-width: 768px) {
    #mobile-controls {
        display: flex;
    }
    
    h1 {
        font-size: 28px;
    }
    
    button {
        font-size: 16px;
    }
    
    #ui {
        font-size: 16px;
    }
}
.space-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.space-star {
    position: absolute;
    background-color: white;
    border-radius: 50%;
    animation: twinkle 3s infinite alternate;
}

.space-spaceship {
    position: absolute;
    width: 40px;
    height: 40px;
    background-size: contain;
    background-repeat: no-repeat;
    opacity: 0.8;
    animation: space-fly 15s linear infinite;
}

.space-spaceship-1 {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 40 40"><polygon points="20,5 5,35 35,35" fill="%23f1c40f"/><rect x="18" y="25" width="4" height="10" fill="%23e74c3c"/></svg>');
}

.space-spaceship-2 {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 40 40"><rect x="10" y="15" width="20" height="10" fill="%233498db"/><polygon points="10,15 20,5 30,15" fill="%233498db"/><rect x="18" y="25" width="4" height="10" fill="%23e74c3c"/></svg>');
}

.space-spaceship-3 {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 40 40"><rect x="15" y="10" width="10" height="20" fill="%232ecc71"/><polygon points="15,10 5,20 15,30" fill="%232ecc71"/><polygon points="25,10 35,20 25,30" fill="%232ecc71"/><rect x="18" y="30" width="4" height="10" fill="%23e74c3c"/></svg>');
}

@keyframes space-fly {
    0% {
        transform: translateX(var(--start-x)) translateY(var(--start-y)) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.8;
    }
    90% {
        opacity: 0.8;
    }
    100% {
        transform: translateX(var(--end-x)) translateY(var(--end-y)) rotate(360deg);
        opacity: 0;
    }
}

@keyframes twinkle {
    0% { opacity: 0.2; }
    100% { opacity: 1; }
}