@font-face {
    font-family: 'Kenney Future';
    src: url('/assets/ui/Font/Kenney Future.ttf') format('truetype');
    font-display: block;
}
body {
    margin: 0;
    padding: 0;
    color: rgba(255, 255, 255, 0.87);
    background-color: #070a18;
    font-family: 'Kenney Future', Verdana, sans-serif;
}
#app {
    width: 100%;
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}
#game-container canvas { image-rendering: auto; }

#rotate-device {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: #070a18;
    color: #fff;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 18px;
    padding: 32px;
    box-sizing: border-box;
    text-align: center;
}
#rotate-device strong { color: #ffc94a; font-size: clamp(28px, 9vw, 48px); }
#rotate-device span { color: #c7cdf0; font-size: clamp(16px, 5vw, 24px); }
.rotate-icon { color: #3ee6c8; font-size: 72px; }
@media (orientation: portrait) and (pointer: coarse) {
    #rotate-device { display: flex; }
    #app { visibility: hidden; }
}