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

body {
    background: #0a0d12;
    color: #eef2ff;
    font-family: "Segoe UI", sans-serif;
}

.app-shell {
    position: fixed;
    inset: 0;
    width: 100vw;
    width: 100dvw;
    height: 100vh;
    height: 100dvh;
    display: grid;
    place-items: center;
    padding: 0;
    box-sizing: border-box;
    overflow: hidden;
}

#game-canvas {
    display: block;
    background: #11161f;
    image-rendering: auto;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
    max-width: 100%;
    max-height: 100%;
    touch-action: none;
}