/**
 * rem is a unit to measure the font size 
 *         1 rem =16 px by default
 * 
 * =======================================================================================================
 * 
 *     The * selector selects all elements.
 * The * selector can also select all elements inside another element
 * 
 * another example
 * Select all elements inside <div> elements and set their background color to yellow:
 * 
 * div * {
 *     background-color: yellow;
 * }
 * 
 * =======================================================================================================
 *
 * @format
 */

* {
  margin: 10;
  padding: 0;
  text-align: center;
}
body {
  background-color: white;
}
h1 {
  font-size: 5rem;
}

.container {
  width: 80%;
  height: 40%;
  background-color: black;
  color: white;
  margin: auto;
  margin-top: 10.5rem;
  border-radius: 30px;
}

.btn {
  border: 2px solid white;
  border-radius: 10px;
  background: none;
  color: white;
  font-size: 1.5rem;
  padding: 1px 5px;
  margin: 2.5rem 0rem;
}