td {
  width: 180px;
  height: 80px;
  border: 1px solid transparent;
  border-radius: 70px;
  text-align: center;
}
.ngay{
  color: white;
  font-family: arial;
  width: 130px;
  height: 50px;
  background-color: orange;
  border: 1px solid black;
}
.he{
  text-align: center;
  font-family: arial;
  color: pink;
}
#sang{
  background-color: grey;
  color: blue;
  border: 2px solid;
  border-radius:30px;
  width: 130px;
  height: 50px;
  text-align: center;
  font-family: arial;
}
#monday-activity{
  background-color: lightyellow;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
#tuesday-activity{
  background-color: lightcoral;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
#wednesday-activity{
  background-color: lightpink;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
#thurday-activity{
  background-color: lightblue;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
#friday-activity{
  background-color: lightgreen;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
#saturday-activity{
  background-color: lightpink;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
#sunday-activity{
  background-color: lightgreen;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}

.chieu{
  background-color: grey;
  color: blue;
  border: 2px solid;
  border-radius:30px;
  width: 130px;
  height: 50px;
  text-align: center;
  font-family: arial;
}
.monday-activity{
  background-color: lightblue;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
.tuesday-activity{
  background-color: lightpink;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
.wednesday-activity{
  background-color: lightcoral;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
.thurday-activity{
  background-color: lightgreen;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
.friday-activity{
  background-color: lightyellow;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
.saturday-activity{
  background-color: lightsalmon;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}
.sunday-activity{
  background-color: lightblue;
  text-align: center;
  border: 2px solid;
  border-radius:30px;
  font-family: arial;
}