.rc1
{
  border-radius: 10px;
}


div.exc1 {
  max-width: 1200px; 
  margin: auto;
  border: 0px;
  text-align: center;
  line-height: 0.9;
}


div.ex1 {
  max-width: 1200px; 
  margin: auto;
  border: 0px;
  text-align: left;
  line-height: 0.9;
}
div.ex2 {
  width: 80%;
  margin: auto;
  border: 0px;
  text-align: left;
  line-height: 0.9;
  white-space: nowrap;
}
div.center {
  width: 100%;
  margin: auto; 
  line-height: 1;
  text-align: center;
}
div.htop {
  width: 100%;
  margin: auto;
  border: 0px;
  text-align: center;
  line-height: 0.9;
}
div.hbot {
  width: 100%;
  margin: auto;
  border: 0px;
  text-align: center;
  line-height: 1.5;
}
div.centerleft {
  max-width: 600px; 
  margin: auto;
  border: 0px;
  text-align: left;
  line-height: 0.9;
}

.sidebar

::-webkit-scrollbar {
  width: 20px;
}

::-webkit-scrollbar-track {
  box-shadow: inset 0 0 5px white; 
  border-radius: 10px;
}
 
::-webkit-scrollbar-thumb {
  background: pink; 
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: lightgreen; 
}