html {
  margin: 0;
  /*-webkit-user-select: none;  /* Chrome all / Safari all */
  /*-moz-user-select: none;     /* Firefox all */
  /*-ms-user-select: none;      /* IE 10+ */
  user-select: none;          /* Likely future */      
  background: #ecf0f3;
}

table,
td,
tr {
  padding: 5px;
  border-radius: 10px;
  /* background-color: rgb(161, 161, 161); */
}

table {
  /* border: 2px solid black; */
  margin: 100px auto;
  background: #ecf0f3;
  box-shadow: -4px -4px 20px #ffffff, 5px 5px 20px #cbced1;
  border-collapse: separate;
  border-spacing: 10px;
  *border-collapse: expression("separate", cellSpacing= "10px");
}

td {
  /* border-color: gray; */
  padding: 8px;
  font-size: large;
  font-weight: 600;
  font-optical-sizing: inherit;
  color: rgb(39, 39, 30);
}

tbody {
  text-align: center;
}

input {
  border: none;
  background-color: transparent;
  height: 70%;
  width: calc(100% - 18px);
  margin-left: 10px;
  box-sizing: border-box;
}

#screen {
  padding: 0px;
  height: 70px;
}

#writer {
  font-size: medium;
}

thead td {
  /* background: linear-gradient(135deg, rgba(0,0,0,0.22), rgba(255,255,255,0.25)); */
  /* box-shadow: inset 8px 8px 16px 0 rgba(0, 0, 0, 0.3), */
  /* inset -8px -8px 16px 0 rgba(255, 255, 255, 0.2); */
  margin-left: 30px;
  box-shadow: inset 4px 4px 8px #cbced1, inset -4px -4px 8px #ffffff;
}

tbody td {
  box-shadow: 3px 3px 8px #cbced1, -3px -3px 8px #ffffff;
}

tbody td:active {
  box-shadow: inset -3px -3px 8px #ffffff, inset 3px 3px 8px #cbced1;
}