/* A margin and padding are provided 0 
    box-sizing border box is used to include 
    padding and border in the total width 
    and height of the element, and font-family 
    can be specified by the user */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
/*  font-family: "Open Sans"; */
  font-family: "Exo 2";
}

/* The user display allows you to specify the
    background colour and height. The 
    display:flex property, which is aligned at the
    centre, is used to fill available free space 
    or to shrink them to prevent overflow. */
body {
  /*background-color: white;*/
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

/* font-weight Specifies weight of glyphs 
    in the font, their degree of blackness or 
    stroke */
h1 {
  font-weight: 900;
  margin-bottom: 12px;
  font-size: 24px;
  text-align: center;
}
h2 {
  font-size: 18px;
}

h3 {
  font-size: 18px;
}


div {
  /*width: 480px;*/
  margin: 12px 0;
  padding: 24px;
  text-align: center;
}

input[type="number"] {
  width: 84px;
  font-size: 18px;
  padding: 8px;
  margin: 0px 8px 8px 8px;
}

select {
  width: 260px;
  font-size: 18px;
  padding: 8px;
  margin: 0px 8px 8px 8px;
}

/* The text-transform:uppercase property 
    causes characters to be raised to uppercase. 
    The button's font-weight, font-size, and 
    cursor type can be customised by the user. */
button {
  text-transform: uppercase;
  font-weight: 900;
  font-size: 20px;
  margin: 12px 0;
  padding: 8px;
  cursor: pointer;
  letter-spacing: 1px;
}

/* The font-weight, font-size, background-color, 
    and border can all be customized by the user. 
    The border-radius property allows you to give 
    an element rounded corners.*/
input[type="text"] {
  font-size: 22px;
  padding: 8px 0;
  font-weight: 900;
  text-align: center;
  background-color: white;
  border: 2px solid #ccc;
  border-radius: 6px;
  margin: 8px 8px 8px 8px;
}