body {
    border: 3px solid rgb(126, 185, 180);
    padding:10px 22px;
    margin:0 auto;
    background-color:rgb(240, 222, 144);
    font-size: 30px;
}
.course-box {
  border: 3px solid #e2a60e80;
  border-radius: 15px;
  padding: 20px;
  background-color: #FFF8E7;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  margin-bottom: 20px;
}

.course-title {
  color: #1B5E20;
  border: 3px solid #e2a60e80;
  text-align: center;
  border-radius: 20px;
  box-shadow: 0 5px 15px rgba(0,0,0,5.5);
}

.course-text {
  color: #555;
  text-align: left;
  font-size: 30px;
  padding-right: 20px;
  padding-top: 10px;
  list-style-position: inside;
  margin: 0;
}

.course-btn {
  background-color: #B8860B;
  color: white;
  padding: 8px 18px;
  border-radius: 20px;
  text-decoration: none;
  display: inline-block;
  margin-left : 100PX;
}

.course-img {
  width: 100%;
  border-radius: 10px;
  margin-bottom: 10px;
  margin-top: 20px;
}

<style>
th, td {
  border: 1px solid rgba(224, 185, 9, 0.938);
  border-radius: 10px;
  border-style:inset;
}
</style>