body {
  background: lightblue;
  font-family: Arial, sans-serif;
  transition: background .1s;
  background-color: #000 !important;
}

.calc {
  font-family: Arial, sans-serif;
  text-rendering: geometricPrecision;
  width: 260px;
  background: grey;
  margin: 100px auto 0 auto;
  border-radius: 5px;
  box-shadow: 0 4px 40px rgba(0,0,0,0.2),
    inset 0 3px 0 rgba(255,255,255,0.2);
  padding: 20px
}

.display {
  font-family: 'Roboto Condensed', sans-serif;
  color: rgba(255,255,255,0.8);
  background: rgba(0,0,0,.6);
  font-size: 35px;
  padding: 10px;
  text-align: right;
  border-radius: 2px;
  box-shadow: inset 0 5px 8px rgba(0,0,0,0.3), 0 1px 0 rgba(255,255,255,0.3);
}

.header .titles {
  text-transform: uppercase;
  letter-spacing: 2px;
  color: rgba(0,0,0,0.45);
  font-size: 10px;
  font-weight: bold;
  margin-top: -8px;
  padding-bottom: 8px;
  text-align: right;
  text-shadow: 0 1px 1px rgba(255,255,255,0.15);
  user-select: none;
}

.display-main {
  height: 38px;
}

.display-indicate {
  font-size: 10px;
  color: rgba(255,255,255,0.05);
  text-align: left;
  margin: -5px 0 -2px -5px;
  text-transform: uppercase;
  user-select: none;
  transition: color .1s ease-in;
}
.max{
  color: rgba(255,150,150,0.8);
}

.display-operations {
  font-size: 15px;
  color: rgba(255,255,255,0.5);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 3px;
  margin-top: 4px;
}

.row {
  margin-left: -12px;
  margin-top: 10px;
}

.row:after, .bottom-row:after {
  content: "";
  display: block;
  clear: both;
}

.left, .right {
  float: left;
}

.button {
  position: relative;
  top:0;
  height: 41px;
  color: rgba(0,0,0,0.6);
  font-size: 16px;
  font-family:"Arial Bold", Gadget, Arial, sans-serif;
  font-weight: 700;
  text-align: center;
  padding: 9px 0 11px 0;
  border-radius: 2px;
  float: left;
  width: 56px;
  background: rgba(255,255,255,0.8);
  margin-left: 12px;
  text-transform: uppercase;
  border: 0;
  box-shadow: 0 1px 1px rgba(0,0,0,0.2),
    inset 0 1px 0 rgba(255,255,255,0.6);
  transition: all .1s;
  cursor:pointer;
  user-select: none;
}

.button:hover {
  box-shadow: 0 2px 6px rgba(0,0,0,0.15),inset 0 1px 0 rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.95);
  color: rgba(0,0,0,0.8);
}
.button:active {
  top:1px;
  box-shadow: 0 0 2px rgba(0,0,0,0.15),inset 0 1px 0 rgba(255,255,255,0.3);
}
.button:focus {
  outline:0;
}

.ac, .ce {
  background: #FF8A80
}

.ac:hover, .ce:hover {
  background: #FF5252;
}

.minus {
  padding-top: 11px;
  padding-bottom: 9px;
}

.zero {
  width: 124px;
}

.eq{
  margin-top: 10px;
  padding: 35px 0 15px 0;
}

.mult {
  text-transform: none;
  padding-top: 9px;
  padding-bottom: 11px;
}