:root {
    color-scheme: dark;
    font-family: Arial, sans-serif;
    background: #080d21;
    color: #f4efff;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    overscroll-behavior: none;
}

#app {
    width: 100%;
    height: 100vh;
    height: 100dvh;
    padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px)
        env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(ellipse at top, #252541, #080d21 75%);
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

#game-container canvas {
    display: block;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

#game-container canvas:focus-visible {
    outline: 2px solid #8af6de;
    outline-offset: -2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}