body {
    font-family: fantasy;
    background-color: #eee;
    color: #333;
}
body.error {
    margin-left: auto;
    margin-right: auto;
    width: 500px;
}

#webmaster, img.webmaster {
    max-width: 300px;
}

*, *:before, *:after {
  box-sizing: border-box;
}

h1, p {
  margin: 0 0 1em 0;
}

.wrapper {
  max-width: 1024px;
  margin: 0 20px;
  display: grid;
  grid-gap: 10px;
}

/* no grid support? */

.wrapper {
  display: flex;
  flex-wrap: wrap;
}

.wrapper {
  display: grid;
  margin: 0 auto;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  grid-auto-rows: minmax(150px, auto);
}

.panel {
  /* needed for the flex layout*/
  margin-left: 5px;
  margin-right: 5px;
  flex: 1 1 200px;
  /* background-color: #aaa; */
  /* color: #fff; */
  border-radius: 5px;
  padding: 20px;
  font-size: 150%;
  margin-bottom: 10px;
}

.header, .footer {
  margin-left: 5px;
  margin-right: 5px;
  flex: 0 1 100%;
  grid-column: 1 / -1;
}

.xwrapper > * {
  background-color: #aaa;
  color: #fff;
  border-radius: 5px;
  padding: 20px;
  font-size: 150%;
  margin-bottom: 10px;
}

/* We need to set the margin used on flex items to 0 as we have gaps in grid.  */

@supports (display: grid) {
  .wrapper > * {
    margin: 0;
  }
}