$footer_height: 55px;
$footer_margin: 20px;
$footer_paddingtop: 15px;
$footer_paddingbtn: 10px;
$body_maxwidth: 650px;

html {
  box-sizing: border-box;
}
* {
  box-sizing: inherit;
}

body {
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";
  line-height: 1.5em;
  margin: 0;
  margin-bottom: $footer_height + $footer_margin + $footer_paddingtop + $footer_paddingbtn;
}
.container {
  max-width: $body_maxwidth;
  margin-left: auto;
  margin-right: auto;

  @media all and (max-width: $body_maxwidth+2*8px) {
    margin-left: 8px;
    margin-right: 8px;
  }
}

html {
  box-sizing: border-box;
  position: relative;
  min-height: 100%;
}

h1, h2, h3, h4 {
  font-weight: 300;
  line-height: 1.2em;
}
p, li {
  line-height: 1.5em;
}

h1 {
  padding: 30px 0;
  font-size: 3em;
  text-align: center;

  @media all and (max-width: 450px) {
    padding: 15px 0;
    font-size: 2.2em;
  }
}


main {
  margin-top: 50px;
}

footer {
  width: 100%;
  height: $footer_height;

  font-size: 0.8rem;
  margin-top: $footer_margin;
  padding-top: $footer_paddingtop;
  padding-bottom: $footer_paddingbtn;
  background-color: #bebebe;
  color: #000;
}

footer .container {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -moz-flex;
  display: -webkit-flex;
  display: flex;

  flex-direction: row;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  justify-content: space-between;

  @media all and (max-width: 450px) {
    flex-direction: column;
    text-align: center;
  }
}

/* make footer sticky */
html {
  position: relative;
  min-height: 100%;
}
footer {
  position: absolute;
  bottom: 0;
}