body>*:not(nav) {
  padding: 50px 100px;

}

h1 {
  text-align: center;
  background-color: #0067B0;
  color: white;
  padding: 5px;
  margin: 0px 50px;
}

#textbox {
  /* box-sizing: border-box; 
  width: calc(100% - 100px);
  margin: 0px 50px; */
  width: 93.34%;
  margin-left: 50px;
  padding-bottom: 10px;
  border-color: #0067B0;
  font-size: 15px;
}

p {
  text-align: center;
  background-color: #0067B0;
  font-size: 25px;
  font-weight: bold;
  color: white;
  padding: 10px;
  margin: 0px 50px;
}

@media (max-width: 950px){
  #textbox{
    width: 81.9%;
    margin-left: 35px;
  }
  h1{
    margin: 0px 35px;
  }
  p{
    margin: 0px 35px;
  }
}