body {
  background-color: #A8C99A;
  /*---------------------------
  make text selection impossible
  --------------------------------*/
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

#brand a {
  padding: 5px 0 0 0;
  color: #aaa;
  font-size: 10px;
  letter-spacing: 3px;
  text-decoration: none;
  outline: 0;
}

#brand a:hover {
  color: #BFCCD2;
}

#calculator {
  position: relative;
  text-align: center;
  background-color: #555;
  width: 300px;
  height: 390px;
  margin: 27px auto;
  padding: 10px;
  border-radius: 20px;
  -webkit-box-shadow: 0 6px 3px #444, 0 2px 2px #ccc inset;
  -moz-box-shadow: 0 6px 3px #444, 0 2px 2px #ccc inset;
  box-shadow: 0 6px 3px #444, 0 2px 2px #ccc inset;
  cursor: default;
}

#displayM {
  position: absolute;
  width: 27px;
  height: 12px;
  left: 23px;
  top: 45px;
  line-height: 1;
  color: #88A0AC;
  text-align: left;
  padding-left: 3px;
}

#screen {
  width: auto;
  height: 70px;
  margin: 9px 10px 8px 10px;
  background-color: #ECF5FF;
  -webkit-box-shadow: 0 4px 2px rgba(0, 0, 0, 0.2) inset, 0 -4px 2px rgba(0, 0, 0, 0.2) inset, 0 4px 2px 2px rgba(0, 0, 0, 0.2);
  -moz-box-shadow: 0 4px 2px rgba(0, 0, 0, 0.2) inset, 0 -4px 2px rgba(0, 0, 0, 0.2) inset, 0 4px 2px 2px rgba(0, 0, 0, 0.2);
  box-shadow: 0 4px 2px rgba(0, 0, 0, 0.2) inset, 0 -4px 2px rgba(0, 0, 0, 0.2) inset, 0 4px 2px 2px rgba(0, 0, 0, 0.2);
  border-radius: 15px;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#D7EAFF), to(#FFFFFF));
  background-image: -webkit-linear-gradient(top, #D7EAFF, #ECF5FF, white);
  background-image: -moz-linear-gradient(top, #D7EAFF, #ECF5FF, white);
  background-image: -ms-linear-gradient(top, #D7EAFF, #ECF5FF, white);
  background-image: -o-linear-gradient(top, #D7EAFF, #ECF5FF, white);
  background-image: linear-gradient(180deg, #D7EAFF, #ECF5FF, white);
  padding: 7px 3px 5px 3px;
}

#outputScr {
  font-size: 14px;
  overflow: hidden;
  height: 21px;
  width: 250px;
  background-color: transparent;
  color: #777;
  border: 0;
  margin: 3px auto;
  outline: 0;
  text-align: right;
  cursor: default;
}

#inputScr {
  width: 250px;
  background-color: transparent;
  color: #777;
  border: 0;
  margin: 3px auto;
  outline: 0;
  text-align: right;
  cursor: default;
  font-size: 21px;
  line-height: 1;
  padding-top: 3px;
  overflow: hidden;
  height: 27px;
}

#buttons {
  padding-top: 2px;
}

#zero,
#decpoint,
#plus,
#one,
#two,
#three,
#minus,
#equals,
#four,
#five,
#six,
#times,
#reciprocal,
#seven,
#eight,
#nine,
#divide,
#percent,
#backspace,
#ce,
#c,
#plusminus,
#sqroot,
#mc,
#mr,
#ms,
#mp,
#mm {
  color: #333;
  font-size: 17px;
  padding: 5px 3px 3px 3px;
  -webkit-text-shadow: 0 -1px white, 0 1px #bbb;
  -moz-text-shadow: 0 -1px white, 0 1px #bbb;
  text-shadow: 0 -1px white, 0 1px #bbb;
  display: inline-block;
  width: 45px;
  height: 34px;
  margin: 5px 2px;
  background-color: #EBEBEB;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#FFFFFF), to(#D8D8D8));
  background-image: -webkit-linear-gradient(top, #FFFFFF, #D8D8D8);
  background-image: -moz-linear-gradient(top, #FFFFFF, #D8D8D8);
  background-image: -ms-linear-gradient(top, #FFFFFF, #D8D8D8);
  background-image: -o-linear-gradient(top, #FFFFFF, #D8D8D8);
  background-image: linear-gradient(180deg, white, #D8D8D8);
  border-radius: 7px;
  -webkit-box-shadow: 0 3px 1px rgba(0, 0, 0, 0.2), 0 -2px 3px rgba(0, 0, 0, 0.3) inset, 0 -2px 0 white inset;
  -moz-box-shadow: 0 3px 1px rgba(0, 0, 0, 0.2), 0 -2px 3px rgba(0, 0, 0, 0.3) inset, 0 -2px 0 white inset;
  box-shadow: 0 3px 1px rgba(0, 0, 0, 0.1), 0 -2px 3px rgba(0, 0, 0, 0.4) inset, 0 -2px 0 white inset;
  vertical-align: middle;
}

#minus,
#plus {
  margin-right: -4px;
}

#zero {
  width: 98px;
}

#equals {
  height: 78px;
  margin-right: 11px;
  float: right;
}

#backspace {
  font-size: 160%;
  line-height: 0.8;
}

#plusminus {
  line-height: 1.3;
}

#times {
  font-size: 150%;
  line-height: 1.5;
}

#minus {
  font-size: 123%;
  line-height: 1.2;
}

#plus {
  font-size: 123%;
  line-height: 1.4;
}

#decpoint {
  font-size: 160%;
  line-height: 1;
}

#equals {
  font-size: 170%;
  padding-top: 20px;
}

#buttons div:hover {
  background-color: #EBEBEB;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#F7F9F9), to(#BFCCD2));
  background-image: -webkit-linear-gradient(top, #F7F9F9, #BFCCD2);
  background-image: -moz-linear-gradient(top, #F7F9F9, #BFCCD2);
  background-image: -ms-linear-gradient(top, #F7F9F9, #BFCCD2);
  background-image: -o-linear-gradient(top, #F7F9F9, #BFCCD2);
  background-image: linear-gradient(180deg, #F7F9F9, #BFCCD2);
}

#notes {
  width: 300px;
  margin: auto;
  background-color: #CDE0C5;
  border: 2px solid #aaa;
  border-radius: 10px;
  padding: 5px;
}

ul {
  padding-left: 21px;
  margin-bottom: 0;
}

.article {
  padding: 3% 10% 1%;
}

a {
  color:rgb(0, 38, 255)
}