.container-header {
  background-color: dimgray;
  background-image: none;
}

.site-description {
  align-items: center; 
  font-size: xxx-large;
}

body {
  background-color: lightgray;
}

h1, h2, h3 {
  color: darkblue;
}

.h1, h1 {
  font-size: calc(0.9rem + .6vw);
}

.h2, h2 {
  font-size: calc(0.8rem + .5vw);
}

.h3, h3 {
  font-size: calc(0.7rem + .4vw);
}


footer, .footer, container-footer, .container-footer {
  background-color: dimgray;
  background-image: none;
}