body {
  max-width: 1200px;
  padding: 15px;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
table {
  text-align: center;
  border-spacing: 0;
  font-size: 20px;
  width: 50%;
  margin: 0 auto;
  height: 450px;
  margin-bottom: 50px;
}

td,
th {
  border: 1px solid #000;
}
td {
  cursor: pointer;
}

.th,
.th .th {
  background-color: rgba(48, 48, 48, 0.867);
  color: rgb(72, 255, 0);
  font-weight: 700;
}
.tdtd {
  background-color: rgba(0, 255, 242, 0.582);
  color: rgb(3, 3, 43);
  font-weight: 500;
}
.tr-even {
  background-color: rgba(233, 233, 233, 0.867);
}
.calc {
  text-align: center;
}
.calc__inner input {
  text-align: center;
  font-size: 16px;
  line-height: 30px;
  margin-bottom: 20px;
  border: none;
  box-shadow: 0px 0px 14px 0px rgba(83, 19, 19, 0.25);
}
.btn__inner {
  display: flex;
  justify-content: center;
  align-items: center;
}
.btn {
  cursor: pointer;
  border: none;
  background-color: transparent;
  font-size: 22px;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 35px;
  height: 35px;
  margin: 0 10px;
  box-shadow: 0px 0px 14px 0px rgba(83, 19, 19, 0.25);
}