* { margin: 0; padding: 0; box-sizing: border-box; }
html,body { height: 100%; }
body { background-image: url(../images/body_bg.png); }
#container { display: flex; width: 100%; height: 100%; justify-content: center; align-items: center; }
#container img { display: block; width: 100%; height: auto; }
