body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-weight: 300;
  font-size: 3vh;
  margin: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  background: black;
}

.high {
  margin: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-sizing: border-box;
  box-shadow: 0 -5px 10px 0 rgba(255, 255, 255, 0.1), 0 5px 40px 0 rgba(255, 255, 255, 0.3);
  height: 90vh;
  width: 70vw;
  background: rgb(44, 44, 44);
  color: white;
}

@media only screen and (max-width: 700px) {
  .high {
    height: 100vh;
    width: 100vw;
  }
}
/* high means all of it */
/* Top Segment */
.screen {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-end;
  background-image: linear-gradient(40deg, #f75c03, #d90368);
  height: 28%;
}
.answer {
  padding: 1.5vh;
  color: white;
  height: 60%;
  font-size: 220%;
  /* border: 2px solid red; */
  display: flex;
  justify-content: center;
  align-items: center;
}
.operation {
  /* border: 2px solid red; */
  color: white;
  height: 40%;
  padding: 0vw 2vh;
  font-size: 80%;
  display: flex;
  justify-content: center;
  align-items: center;
}
/* Middle segment */
.tray {
  display: flex;
  flex-direction: column;
  height: 60%;
}
/* does not include the bottom line */
.spl {
  display: flex;
  text-align: center;
  justify-content: center;
  align-items: center;
  height: 25%;
}
.AC {
  color: #f75c03;
  width: 50%;
  border-right: 1px solid #f75c03;
  border-bottom: 1px solid #f75c03;
  box-sizing: border-box;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 900;
}
.clear,
.divide {
  width: 25%;
  background-color: black;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.sub-tray {
  display: flex;
  height: 100%;
}
.number {
  width: 75%;
  display: flex;
  flex-wrap: wrap;
  text-align: center;
}
.number > div {
  width: 33.333%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.buttons {
  width: 25%;
  display: flex;
  flex-direction: column;
  background-color: black;
}
.buttons > div {
  height: 33.3333%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.add,
.multiply,
.divide {
  font-size: 120%;
}
/* Last segment */
.bottom {
  display: flex;
  text-align: center;
  align-items: center;
  height: 14.4%;
}
.decimal {
  width: 25%;
  background-color: black;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.zero {
  width: 25%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.equal {
  width: 50%;
  color: white;
  background-image: linear-gradient(40deg, #f75c03, #d90368);
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 150%;
}