html {
  width: 100dvw;
  max-height: 100dvh !important;
  overflow: hidden;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  touch-action: manipulation;

  height: 100dvh;
  padding: 1em;
  gap: 1em;

  /* min-width: 100vw; */
  width: 100vw;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: "Roboto", sans-serif;

  overflow: hidden;
}

#divMorseTreeContainer {
  user-select: none;
  max-height: 50%;
}

.left .h {
  right: -50%;
}
.right .h {
  left: -50%;
}

.flex.right::before,
.flex.left::before {
  content: '';
  width: 1px;
  background-color: #000;
  position: absolute;
  
  height: 2em;
  top: -2em;
}

.flex.right::before {
  left: -50%;
}

.flex.left::before {
  right: calc( -50% - 1px );
}

.h {
  height: 1px;
  position: absolute;
  width: 100%;
  background-color: #00000080;
}

.v {
  height: 50px;
  width: 1px;
  background-color: #00000080;
}

.flex {
  margin-top: .25em;
  display: flex;
  flex-wrap: nowrap;
  position: relative;
  justify-content: space-around;
  width: 100%;
}
.row {
  display: flex;
  flex-wrap: nowrap;
  width: 50%;
}

.column {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.value::before {
  content: '';
  height: 1.35em;
  /* width: 1.35em; */
  background-image: linear-gradient( #00000020, #00000000 40%, #FFFFFF80 75% );
  z-index: 1;

  border-radius: 2em;

  position: absolute;
  left: 50%;
  top: .35em;
  transform: translateX(-50%);
}

.value {
  padding: .5em 0px !important;
  background-color: #fafafa;
  box-shadow: 
    inset -.25rem .25rem 2px #FFFFFF88, 
    inset -1rem 1rem 1rem #00000010, 
    inset .25rem 0px 0px #00000010, 
    inset 0px -.25rem 0px #00000015;

  aspect-ratio: 4/3 !important;
  border-radius: 4px;
  
  /* width: fit-content; */
  /* min-width: .25em; */
  width: 1.5em;
  font-size: 2em;
  text-align: center !important;

  margin: auto;

  z-index: 1;
  position: relative;
  transition: .125s;
}

.track .h {
  height: 4px;
} 
.track .v {
  width: 4px;
}
.track .flex.right::before,
.track .flex.left::before,
.track .h, .track .v {
  background-color: #209bd3;
}

.track .flex.right::before,
.track .flex.left::before {
  width: 4px;
}

.selected.value {
  /* background-color: #fff; */
  background-color: #53b9e8;
  color: #fff;
  transform: translateY(-.25em);
  box-shadow: 
    0rem .5em .5em #00000020, 
    inset -.25rem .25rem .125rem #FFFFFF88, 
    /* inset -1rem 1rem 1rem #FFFFFF80,  */
    /* inset .25rem -.25rem .125rem #00000016,  */
    inset 4px -4px 0px #00000020;

    filter: brightness(1.02);
  /* box-shadow: none !important; */
  transition: .25s;
}

#preCurrentCommandVisualization {
  background-color: #eee; 
  box-shadow: inset 0 .25em .25em #d8d8d8;
  min-height: 2em !important; 
  height: 100%;
  min-width: 300px !important;
  /* width: 100%; */
}

#preCommandsVisualization {
  background-color: #f8f8f8; 
  flex-grow: 1;text-wrap: auto;
  min-width: 200px;
}

#preTextVisualization {
  margin-top: 0 !important;
}

#preCurrentCommandVisualization, #preCommandsVisualization, #preTextVisualization {
  font-size: 20px; 
  min-height: 50px; 
  /* min-width: min( 100%, 800px );  */
  width: fit-content; 
  margin: auto; 
  padding: .25em .5em; 
  line-height: 2em; 
  /* margin-top: .5em; */
}

#preTextVisualization {
  user-select: none;
}

#btnUndoLastCommand {
  transition: .25s;
}
#btnUndoLastCommand:active {
  background-color: #ccc !important;
  transition: .25s;
}