@font-face {
  font-family: "proximanova";
  src: url("https://s.dcdn.eu/images/fonts/proximanova-reg-webfont.woff") format('woff');
}

@font-face {
  font-family: "proximanova";
  src: url("https://s.dcdn.eu/images/fonts/proximanova-sbold-webfont.woff") format('woff');
  font-weight: 700;
}

body {
  box-sizing: border-box;
  font-family: 'proximanova', trebuchet ms, Verdana, 'Arial', sans-serif;
  font-size: 14px;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  font-smoothing: antialiased;
  text-size-adjust: 100%;
}

@font-face {
  font-family: "proximanova";
  src: url("https://s.dcdn.eu/images/fonts/proximanova-reg-webfont.woff") format('woff');
}

@font-face {
  font-family: "proximanova";
  src: url("https://s.dcdn.eu/images/fonts/proximanova-sbold-webfont.woff") format('woff');
  font-weight: 700;
}

body {
  box-sizing: border-box;
  font-family: 'proximanova', trebuchet ms, Verdana, 'Arial', sans-serif;
  font-size: 14px;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  font-smoothing: antialiased;
  text-size-adjust: 100%;
  margin: 0;
}

Remove the margin on the body element
Remove the margin on the body element
