html, body { padding: 0; margin: 0; width: 100%; height: 100%; overflow: hidden; background: #000 }
#unity-container { position: fixed; inset: 0; display: flex; align-items: center; justify-content: center }
/* ウィンドウ内で16:9を保って最大表示(余白はレターボックス) */
#unity-canvas { background: #231F20; width: min(100vw, calc(100vh * (16 / 9))); height: min(100vh, calc(100vw * (9 / 16))) }
#unity-loading-bar { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); display: none }
#unity-logo { width: 154px; height: 130px; background: url('unity-logo-dark.png') no-repeat center }
#unity-progress-bar-empty { width: 141px; height: 18px; margin-top: 10px; margin-left: 6.5px; background: url('progress-bar-empty-dark.png') no-repeat center }
#unity-progress-bar-full { width: 0%; height: 18px; margin-top: 10px; background: url('progress-bar-full-dark.png') no-repeat center }
#unity-warning { position: absolute; left: 50%; top: 5%; transform: translate(-50%); background: white; padding: 10px; display: none }