* {
  font-family: "Roboto", sans-serif;
  box-sizing: border-box;
}

::selection {
  background-color: #ffa000;
}

body {
  background-color: #eee;
}

#IphoneScreen {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 270px;
  height: 480px;
  background-color: #151515;
}

#Calculator {
  position: absolute;
  bottom: 10px;
  width: 100%;
  overflow: hidden;
}

.ScreenTotal {
  display: flex;
  justify-content: flex-end;
  align-items: flex-end;
  width: 100%;
  height: 87px;
  color: #fff;
  font-size: 3.15rem;
  padding: 10px;
}

ul {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
}
ul li {
  list-style: none;
  font-size: 1.7rem;
  user-select: none;
  margin: 4px;
  cursor: pointer;
}

.Number-btn, .misc-btn, .Operator-btn, .equal {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 58px;
  height: 58px;
  border-radius: 58px;
  background-color: #555;
  color: #fff;
  transition: 0.1s;
}
.Number-btn:hover, .misc-btn:hover, .Operator-btn:hover, .equal:hover {
  background-color: #888;
}

.misc-btn {
  background-color: #aaa;
  color: #222;
}
.misc-btn:hover {
  background-color: #ccc;
}

.Operator-btn, .equal {
  background-color: darkorange;
}
.Operator-btn:hover, .equal:hover {
  background-color: #eac483;
}

.zero {
  display: block;
  padding-top: 13px;
  padding-left: 24px;
  width: 124px;
}

.click {
  background-color: #fff;
  color: darkorange;
  font-weight: 900;
}