app.css

/* Custom color theme properties */
:root {
  --f7-theme-color: #304763;
  --f7-theme-color-rgb: 48, 71, 99;
  --f7-theme-color-shade: #233348;
  --f7-theme-color-tint: #3d5b7e;
}

/*** Custom styles ***/

/* Header, Intro */
.title-large, .intro-div {
  text-align: center;
}

.intro-text {
  max-width: 550px;
  display: inline-block;
  padding-bottom: 25px;
}

/* Arena / Grid World */
#arena-grid, #analysis {
  max-width: 600px;
  margin: 0 auto;
}

#analysis {
  margin-top: 20px;
}

#analysis table {
  margin: 0 auto;
}

td {
  height: 25px;
  width: 25px;
  display: table-cell !important;
}

.plain-field {
  background-color: #73A790
}

.mountain-field {
  background-color: #F0EEE3
}

.diamond-field {
  background-color: #D7B17C
}

.repair-field {
  background-color: #EABAB9
}

/* Controls */
.controls {
  padding-top: 20px;
  padding-bottom: 50px;
}

.controls .button {
  max-width: 250px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.material-icons.money::before{
  content: "monetization_on";
}

.material-icons.build::before{
  content: "build"; 
}

.material-icons.mountain::before{
  content: "keyboard_arrow_up";
}

.material-icons.robot::before{
  content: "android";
}

.field-annotation {
  color: red;
  position: absolute;
  font-family: initial;
  margin-top: -18px;
  margin-left: 7px;
  font-weight: bold;
}