/* Game Area & Canvas */

@keyframes twinkle-small {
    0%,
    100% {
        opacity: 0.3;
    }
    50% {
        opacity: 1;
    }
}

@keyframes twinkle-medium {
    0%,
    100% {
        opacity: 0.5;
    }
    50% {
        opacity: 1;
    }
}

@keyframes twinkle-large {
    0%,
    100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
}

@keyframes nebula-drift {
    0% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(30px, -30px);
    }
    100% {
        transform: translate(0, 0);
    }
}

#game-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #0a0015;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(138, 43, 226, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 0, 127, 0.08) 0%, transparent 50%);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow:
        inset 0 0 100px rgba(0, 255, 255, 0.1),
        inset 0 0 200px rgba(255, 0, 127, 0.05);
    z-index: 1;
    overflow: hidden;
}

#game-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(2px 2px at 20px 30px, #eee, rgba(0, 0, 0, 0)),
        radial-gradient(2px 2px at 60px 70px, #fff, rgba(0, 0, 0, 0)),
        radial-gradient(1px 1px at 50px 50px, #ddd, rgba(0, 0, 0, 0)),
        radial-gradient(1px 1px at 130px 80px, #fff, rgba(0, 0, 0, 0)),
        radial-gradient(2px 2px at 90px 10px, #fff, rgba(0, 0, 0, 0));
    background-repeat: repeat;
    background-size: 200px 200px;
    animation: twinkle-large 3s infinite;
    opacity: 0.5;
    pointer-events: none;
}

#game-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(1px 1px at 10px 20px, #fff, rgba(0, 0, 0, 0)),
        radial-gradient(1px 1px at 40px 40px, #eee, rgba(0, 0, 0, 0)),
        radial-gradient(1px 1px at 70px 60px, #fff, rgba(0, 0, 0, 0)),
        radial-gradient(1px 1px at 100px 30px, #ddd, rgba(0, 0, 0, 0)),
        radial-gradient(1px 1px at 140px 90px, #fff, rgba(0, 0, 0, 0));
    background-repeat: repeat;
    background-size: 200px 200px;
    background-position: 0 0;
    animation: twinkle-medium 4s infinite;
    opacity: 0.4;
    pointer-events: none;
}

canvas {
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
    position: relative;
    z-index: 10;
}

/* Audio Toggle Buttons */
.audio-toggle {
    background: rgba(255, 0, 0, 0.3);
    color: #ff6666;
    border: 2px solid #ff3333;
    padding: 8px 12px;
    cursor: pointer;
    font-family: 'Rajdhani', sans-serif;
    font-size: 11px;
    text-transform: uppercase;
    transition: 0.2s;
    border-radius: 0;
    box-shadow: 0 0 10px rgba(255, 0, 0, 0.3);
}

.audio-toggle:hover {
    background: rgba(255, 0, 0, 0.4);
    border-color: #ff5555;
    box-shadow: 0 0 15px rgba(255, 0, 0, 0.5);
}

.audio-toggle.active {
    background: rgba(0, 255, 255, 0.2);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
    color: var(--neon-cyan);
}