@font-face {
    font-family: 'PixelFont';
    src: url('https://fonts.gstatic.com/s/pressstart2p/v15/e3t4euO8T-267oIAQAu6jDQyK3nVivM.woff2') format('woff2');
}
#nyan-flyer-container {
    flex-grow: 1;
    position: relative; 
    background-image: url('../js/apps/nyanFlyer_assets/bg.png');
    background-size: auto 100%;
    animation: scroll-background 20s linear infinite;
    image-rendering: pixelated;
    font-family: 'PixelFont', sans-serif;
}
.nyan-start-screen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    text-align: center;
    color: white;
}
.nyan-title {
    font-size: 3.5em;
    color: white;
    text-shadow: 4px 4px 0px #ff00ff, 6px 6px 0px #00ffff;
    margin-bottom: 40px;
}
.nyan-btn {
    font-family: 'PixelFont', sans-serif;
    font-size: 1.5em;
    padding: 15px 30px;
    margin-top: 20px;
    background-color: #ff99ff;
    color: white;
    border: 3px solid white;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: 0 5px 0 #cc66cc;
    transition: all 0.1s ease-in-out;
}
.nyan-btn:active {
    transform: translateY(5px);
    box-shadow: 0 0px 0 #cc66cc;
}
.nyan-cat {
    position: absolute;
    width: 80px; 
    height: auto;
    left: 100px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;

    -webkit-user-drag: none;
    user-drag: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
.nyan-obstacle {
    position: absolute;
    width: 80px;
    left: 100%;
    z-index: 50;
    background-image: url('../js/apps/nyanFlyer_assets/nyan-obstacles1.png');
    background-repeat: repeat-y; 
    background-size: 80px auto; 
    image-rendering: pixelated;
}
.nyan-obstacle.top {
    top: 0;
    transform: scaleY(-1); 
}
.nyan-obstacle.bottom {
    bottom: 0;
    top: auto;
}
.nyan-score {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 4em;
    color: white;
    text-shadow: 3px 3px 0 #000;
    z-index: 200;
}
.nyan-game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.7);
    padding: 40px;
    border-radius: 20px;
    border: 5px solid white;
    text-align: center;
    color: white;
    z-index: 300;
}
.nyan-game-over h2 {
    font-size: 3em;
    margin-bottom: 10px;
    color: #ff00ff;
    text-shadow: 2px 2px 0px #00ffff;
}
.nyan-game-over p {
    font-size: 2em;
    margin-bottom: 20px;
}
.rainbow-activated-text {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'PixelFont', sans-serif;
    font-size: 3.5em;
    color: #fff;
    background: rgba(0,0,0,0.7);
    border: 3px solid #ff00ff;
    border-radius: 12px;
    padding: 24px 48px;
    z-index: 500;
    text-align: center;
    text-shadow: 3px 3px 0 #ff00ff, 5px 5px 0 #00ffff;
    letter-spacing: 2px;
    pointer-events: none;
    animation: rainbow-activated-fade 2s linear forwards;
}
@keyframes rainbow-activated-fade {
    0% { opacity: 1; }
    80% { opacity: 1; }
    100% { opacity: 0; }
}
.rainbow-overdrive::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(124deg, #ff2400, #e81d1d, #e8b71d, #e3e81d, #1de840, #1ddde8, #2b1de8, #dd00f3, #dd00f3);
    background-size: 1800% 1800%;
    animation: rainbow-pulse 1s ease-in-out infinite alternate, rainbow-move 8s linear infinite;
    z-index: 40; 
    opacity: 0;
}
@keyframes rainbow-pulse {
    from { opacity: 0.2; }
    to { opacity: 0.4; }
}
@keyframes rainbow-move {
    0%{background-position:0% 82%}
    50%{background-position:100% 19%}
    100%{background-position:0% 82%}
}
@keyframes scroll-background {
    from { background-position: 0 0; }
    to { background-position: -2048px 0; }
}