*{ box-sizing: border-box; line-height: 100%; margin: 0; padding: 0; }

html { height: 100%; }

body { background-image: url("wallpaper.jpg"); background-size: cover; }

div#container { background-color: white; font-family: arial; border: 5px solid red; border-radius: 10px; left: 35%; padding 25px; position: fixed; top: 25%; text-align: center; }

div#container h1 { padding: 0 30px; }

input { border-radius: 1px; margin-top: 1px; padding: 1px; width: 100%; }