:root {
  --lonngray: rgb(32,32,32,0.3);
  --screenwid: 1000px;
  --colwid: 300px;
}

body {
  background: green url(https://smoothee.neocities.org/images/cloudscape.png) no-repeat fixed top left;
  background-size: 200%;
  background-position: -800px -500px;
  color: white;
  font-family: helvetica;
  font-size: 14px;
}

.flex {
  /*border: 1px white solid;*/
  background-color: rgb(255,255,255,0.1);
  margin: auto;
  padding: 10px;
  width: var(--screenwid);
  
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 5px; 
}

.box {
  /*border: 1px gray solid;*/
  /*background-color: var(--lonngray);*/
  width: var(--colwid);
  padding: 10px;
}
.box img {
  width: 100%;
  margin: 10px 0;
}

#header {
  width: var(--screenwid);
  margin: 10px auto;
  /*border: 1px gray solid;*/
  
  display: flex;
  justify-content: center;
}
#header h1 {
  font-size: 30px;
  font-style: italic;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: -0.07em;
}