html, body { padding: 0; margin: 0; width: 100%; height: 100%; overflow: hidden; background: #000; }
/* Chan keo de tai lai trang / cuon trang khi choi bang tay. */
body { overscroll-behavior: none; touch-action: none; -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; -webkit-tap-highlight-color: transparent; }
#unity-container { position: fixed; inset: 0; overflow: hidden; }
#unity-canvas { display: block; width: 100%; height: 100%; background: #FFFFFF; }
#unity-loading-bar { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); display: none; text-align: center; }
#unity-logo { width: 154px; height: 130px; background: url('unity-logo-dark.png') no-repeat center; }
#unity-progress-bar-empty { margin-left: auto; margin-right: auto; width: 141px; height: 18px; margin-top: 10px; 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; }
#nro-progress-text { margin-top: 8px; color: #fff; font: 600 14px/1.2 system-ui, -apple-system, sans-serif; text-shadow: 0 1px 3px #000; }
#unity-warning { position: absolute; left: 50%; top: 5%; transform: translate(-50%); background: white; padding: 10px; display: none; }

/* Cac man hinh phu: may tinh / cham de choi / xoay ngang. */
.nro-screen { position: fixed; inset: 0; z-index: 20; display: flex; padding: 16px; box-sizing: border-box; overflow-y: auto; background: rgba(0, 0, 0, 0.92); color: #fff; font: 16px/1.5 system-ui, -apple-system, sans-serif; text-align: center; touch-action: pan-y; }
.nro-screen > .nro-box { margin: auto; }
#nro-install { z-index: 40; background: #000; }
.nro-icon { display: block; width: 72px; height: 72px; margin: 0 auto 12px; border-radius: 16px; }
.nro-steps { margin: 16px auto; padding: 0 0 0 24px; text-align: left; }
.nro-steps li { margin: 6px 0; }
.nro-share { display: inline-block; padding: 0 6px; border: 1px solid #888; border-radius: 4px; font-size: 14px; }
.nro-btn { display: inline-block; margin: 12px 0; padding: 14px 28px; border: 0; border-radius: 999px; background: #ff9800; color: #000; font: 700 18px/1 system-ui, -apple-system, sans-serif; text-decoration: none; cursor: pointer; }
.nro-screen[hidden] { display: none; }
#nro-start { z-index: 30; cursor: pointer; }
#nro-desktop { z-index: 40; background: #000; }
.nro-box { max-width: 420px; }
.nro-box h1 { margin: 0 0 16px; font-size: 22px; color: #ffd24a; }
.nro-box p { margin: 8px 0; }
.nro-url { padding: 8px 12px; border-radius: 8px; background: #222; color: #ffd24a; word-break: break-all; -webkit-user-select: all; user-select: all; }
.nro-hint { margin-top: 16px; font-size: 14px; color: #ccc; }
#nro-start-btn { padding: 14px 28px; border: 0; border-radius: 999px; background: #ff9800; color: #000; font: 700 18px/1 system-ui, -apple-system, sans-serif; cursor: pointer; }
.nro-phone { width: 48px; height: 80px; margin: 0 auto 16px; border: 4px solid #fff; border-radius: 10px; box-sizing: border-box; animation: nro-rotate 1.6s ease-in-out infinite; }
@keyframes nro-rotate { 0%, 20% { transform: rotate(0deg); } 60%, 100% { transform: rotate(-90deg); } }