/* CSS */
.button-9 {
  appearance: button;
  backface-visibility: hidden;
  background-color: #405cf5;
  border-radius: 6px;
  border-width: 0;
  box-shadow: rgba(50, 50, 93, .1) 0 0 0 1px inset,rgba(50, 50, 93, .1) 0 2px 5px 0,rgba(0, 0, 0, .07) 0 1px 1px 0;
  box-sizing: border-box;
  color: #fff;
  cursor: pointer;
  font-family: -apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Ubuntu,sans-serif;
  font-size: 100%;
  height: 44px;
  line-height: 1.15;
  margin: 12px 0 0;
  outline: none;
  overflow: hidden;
  padding: 0 25px;
  position: relative;
  text-align: center;
  text-transform: none;
  transform: translateZ(0);
  transition: all .2s,box-shadow .08s ease-in;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.button-9:disabled {
  cursor: default;
}

.button-9:focus {
  box-shadow: rgba(50, 50, 93, .1) 0 0 0 1px inset, rgba(50, 50, 93, .2) 0 6px 15px 0, rgba(0, 0, 0, .1) 0 2px 2px 0, rgba(50, 151, 211, .3) 0 0 0 4px;
}


input::file-selector-button {
    font-weight: bold;
    backface-visibility: hidden;
    background-color: #405cf5;
    color: white;
    padding: 0.5em;
    border-radius: 6px;
    border-width: 0;
    box-shadow: rgba(50, 50, 93, .1) 0 0 0 1px inset,rgba(50, 50, 93, .1) 0 2px 5px 0,rgba(0, 0, 0,  07) 0 1px 1px 0;
    color: #fff;
    transition: all .2s,box-shadow .08s ease-in;
}

.input-box{
    background-color: rgba(30,144,255,0.25);
    display: inline-block;
    padding: 20px 20px;
    border:2px solid dodgerblue;
  vertical-align: middle;
}

#outer{
  width:100%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 0em;
}

#left{
    width: 50%;
    flex: 0 0 auto;
    padding: 0em 1em;
}

li{
    padding-top:1em;
}
mathcell{
padding-top:10em;
}