@import url("https://cdnjs.cloudflare.com/ajax/libs/ionicons/2.0.1/css/ionicons.min.css");
@import url("https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,300,400italic,600,700,900,200");
html {
  box-sizing: border-box;
  color: #222;
  font-size: 1rem;
  font-family: Source Sans Pro;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

body {
  background-size: cover;
  background-repeat: no-repeat;
  background-color: #B6B2AB;
  background-image: linear-gradient(135deg,#B6B2AB 0%, #B3AFA7 25%, #B8B5AF 25%, #78736B 50%, #6F6862 50%, #58504B 75%, #5F574E 75%, #625A51 100%);
  min-height: 100vh;
}

.App {
  opacity: 0;
  transition: opacity 0.3s;
}

.Calculator {
  box-shadow: 12px 18px 45px 0 rgba(0, 0, 0, 0.25);
  cursor: default;
  margin: 0 auto;
  transform: translate(-50%, -50%);
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  position: absolute;
  top: 50%;
  left: 50%;
  width: 260px;
}

.Calculator-header {
  background: white;
  overflow: hidden;
  padding: 20px 20px;
  position: relative;
  text-align: right;
}

.Calculator-expressions {
  color: rgba(158, 158, 158, 0.76);
  display: block;
  float: right;
  font-size: 15px;
  line-height: 22px;
  min-height: 22px;
  position: relative;
  white-space: nowrap;
  width: 100%;
  word-wrap: normal;
}

.Calculator-expressionsList {
  display: block;
  float: right;
}

.Calculator__expressionsOverflow {
  color: #333;
  box-shadow: 5px 0 20px 4px rgba(0, 0, 0, 0.3);
  font-weight: 700;
  opacity: 0;
  padding-right: 0px;
  text-align: center;
  transition: opacity 0.5s;
  transform: translate(0, -50%);
  position: absolute;
  top: 50%;
  left: -24px;
  height: 17px;
  width: 2px;
}
.Calculator__expressionsOverflow:before {
  content: "";
}
.Calculator__expressionsOverflow.is-showing {
  opacity: 1;
}

.Calculator-operands {
  color: #151515;
  font-size: 60px;
  font-weight: 200;
  line-height: 1.1;
  clear: both;
}

.Calculator-currentOperand {
  display: block;
  overflow: visible;
  min-height: 60px;
  line-height: 60px;
  float: right;
  transition-duration: 0.2s;
  transition-property: font-size;
}
.Calculator-currentOperand.has-error {
  color: #ef5334;
}

.Calculator-body {
  background: white;
}

.Calculator-buttonsContainer {
  display: flex;
  flex-wrap: wrap;
  overflow: visible;
  position: relative;
}
.Calculator-buttonsContainer:before {
  background-color: rgba(90, 95, 114, 0.76);
  background-image: linear-gradient(to bottom,rgba(90, 95, 114, 0.76), rgba(29, 32, 37, 0.8));
  box-shadow: 17px 27px 72px 1px rgba(0, 0, 0, 0.3);
  filter: drop-shadow(0px 0px 7px rgba(0, 0, 0, 0.2));
  content: "";
  position: absolute;
  top: 0;
  right: -18px;
  bottom: 0;
  left: -18px;
}

.Calculator-button {
  color: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  font-size: 24px;
  font-weight: 300;
  flex: 25%;
  line-height: 70px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.Calculator-button {
  cursor: pointer;
  transition: box-shadow 0.2s, background-color 0.15s;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.15);
}
.Calculator-button:hover {
  background: rgba(0, 0, 0, 0.08);
}
.Calculator-button:active, .Calculator-button.is-active {
  box-shadow: inset 0 3px 15px 0 rgba(0, 0, 0, 0.3);
}
.Calculator-button.has-children:hover, .Calculator-button.has-children:active {
  background: initial;
  box-shadow: none;
  cursor: default;
}
.Calculator-button > span {
  display: block;
}

.Calculator-button--negation,
.Calculator-button--modulo {
  font-size: 18px;
}

.Calculator-button--square {
  font-size: 16px;
}

.Calculator-button--division {
  font-size: 20px;
}

.Calculator-button--multiplication {
  font-size: 30px;
}

.Calculator-button--addition {
  font-size: 26px;
}

.Calculator-button--subtraction {
  font-size: 25px;
}

.Calculator-button--paren {
  display: flex;
  font-size: 18px;
}
.Calculator-button--paren:hover, .Calculator-button--paren:active {
  background: initial !important;
  box-shadow: none !important;
  cursor: default !important;
}
.Calculator-button--paren > span {
  flex: 50%;
}
.Calculator-button--paren > span {
  cursor: pointer;
  transition: box-shadow 0.2s, background-color 0.15s;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.15);
}
.Calculator-button--paren > span:hover {
  background: rgba(0, 0, 0, 0.08);
}
.Calculator-button--paren > span:active, .Calculator-button--paren > span.is-active {
  box-shadow: inset 0 3px 15px 0 rgba(0, 0, 0, 0.3);
}
.Calculator-button--paren > span.has-children:hover, .Calculator-button--paren > span.has-children:active {
  background: initial;
  box-shadow: none;
  cursor: default;
}

.Calculator-equals {
  background-color: #FF8D4B;
  background-image: linear-gradient(to right,#53a982, #008053);
  cursor: pointer;
  padding: 26px 0;
  position: relative;
  z-index: -1;
}

.Calculator-equalsLine {
  background: white;
  display: block;
  margin: 0 auto 6px;
  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.4);
  height: 1px;
  width: 20px;
}

.Calculator-equalsLine:last-child {
  margin-bottom: 0;
}