/* CSS files add styling rules to your content */

body {
    font: 1.1rem "Verdana", helvetica, arial, sans-serif;
    margin: 1rem;
    width: 700px;
  }
  
  h1 {
    font-style: bold;
    font-size: 1.75rem;
    color: #373fff;
  }
  
  canvas {
    background-color: black;
    border: 2px solid black;
    width: 640px;
    height: 340px;
    margin-bottom: 1em;
  }
  
  kbd {
    border-radius: 4px 2px;
    border: 1px solid #000;
    border-radius: 4px;
    padding: 0 1px 0 1px;
    background-color: #eee;
  }
  
  .matrix-box {
    border: 1px solid #999;
    box-shadow: 2px 4px 4px #bbb;
    width: 320px;
    height: 11em;
    font: 1em Verdana,Helvetica,"Open Sans", sans-serif;
    display: inline-block;
  }
  
  .matrix-box h2 {
    font-size: 1.1rem;
    font-weight: bold;
    text-decoration: underline;
    text-decoration-skip-ink: auto;
    text-align: center;
  }
  
  .matrix-box div {
    font-size: 1rem;
  }
  
  .button-box {
    background-color: #DDD;
    color: #000;
    width: 660px;
    border-radius: 0.5em 0.5em;
    padding-left: 1em;
    padding-top: 0.5em;
    margin-bottom: 1em;
    margin-top: 1.2em;
  }
  
  .button-row {
    margin-bottom: 0.7em;
  }
  
  .button-row button {
    margin-bottom: 1em;
  }
  
  .click-here {
    font-size: 1rem;
    font-weight: bold;
  }
  
  math {
    font: 1.1rem Verdana,Helvetica,"Open Sans", sans-serif;
  }