* {
  box-sizing: border-box;
}

html,
body {
  color: #444;
  font-family: 'Helvetica', sans-serif;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  height: 100%;
  margin: 0;
  padding: 0;
  width: 100%;
}

html {
  overflow: hidden;
}

body {
  align-content: stretch;
  align-items: stretch;
  background: #282828;
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  justify-content: flex-start;
  color: #fff;
  -webkit-user-select: none;
  -moz-user-select: -moz-none;
  -ms-user-select: none;
  user-select: none;
}

.calculator-keys {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 100%;
}

.calculator-display {
  float: left;
  text-align: right;
  width: 100%;
  height: 17%;
  font-size: 8vh;
  line-height: 17vh;
  font-weight: 300;
  padding: 0 1.5rem;
  color: #fafafa;
  font-weight: 100;
  overflow-x: scroll;
}

.calculator-key {
  float: left;
  text-align: center;
  width: 25%;
  height: 17%;
  font-size: 6vh;
  font-weight: 300;
  border: 0.5px solid #777;
}

button.calculator-key:focus {
  outline: none;
}

.calculator-key.wide {
  width: 50%;
}

.modal {
  display: none;
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgb(0,0,0);
  background-color: rgba(0,0,0,0.4);
}

.modal-content {
  background-color: #fefefe;
  margin: 15% auto;
  padding: 20px 30px 40px 30px;
  border: 1px solid #888;
  max-width: 500px;
  text-align: center;
}

.modal-close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.modal-close:hover,
.modal-close:focus {
  color: black;
  text-decoration: none;
  cursor: pointer;
}

.hide {
  display: none !important;
}

.show {
  display: block !important;
}

#calculator-set-theme {
  color: #909090;
  color: #fff;
  position: absolute;
  top: 5px;
  left: 10px;
  font-size: 24px;
  z-index: 9;
  text-decoration: none;
}

#calculator-set-theme:hover {
  color: #fafafa;
}

.theme-title {
  color: #777;
}

.radio div {
  display: inline-block;
}
.radio input[type="radio"] {
  display: none;
}
.radio input[type="radio"] + label {
  color: #333;
  font-family: Arial, sans-serif;
  font-size: 14px;
}
.radio input[type="radio"] + label span {
  display: inline-block;
  width: 40px;
  height: 40px;
  margin: -1px 4px 0 0;
  vertical-align: middle;
  cursor: pointer;
  border-radius: 50%;
  border: 2px solid #FFFFFF;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.33);
  background-repeat: no-repeat;
  background-position: center;
  text-align: center;
  line-height: 44px;
}
.radio input[type="radio"] + label span img {
  opacity: 0;
  transition: all .3s ease;
}
.radio input[type="radio"]:checked + label span img {
  opacity: 1;
}

.radio-label {
  display: block;
  margin-top: 8px;
  color: #848484;
  font-size: 14px;
}

.theme {
  padding: 10px;
  width: 100px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.screen-instructions {
  display: none;
  text-align: center;
  max-width: 500px;
  margin: 2rem auto 0;
}

.install-instructions {
  text-align: left;
  line-height: 24px;
  font-size: 18px;
}

@media screen and (max-width: 480px) {
  .calculator-key {
    font-size: 4vh;
  }
}