.c-exams-by-subject{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(550px, 1fr));
  grid-gap: 30px;
}

.c-exams-by-subject .exams-container h3{
  letter-spacing: 1px;
  text-transform: uppercase;
  border-bottom: 2px solid #bebebe;
  border-left: 0;
  border-right: 0;
  padding: 10px 0px;
}

.c-exams-by-subject .exams-container table{
  display: block;
  height: 500px;
  overflow-y: auto;
  border-collapse: collapse;
  text-align: left;
  position: relative;
}

.c-exams-by-subject .exams-container:nth-child(odd) table{
  border-right: 1px solid #bebebe;
}

.c-exams-by-subject .exams-container:last-child table{
  border-right: none;
}

.c-exams-by-subject .exams-container th{
  background: #e7ecef;
  position: sticky;
  top: 0;
  box-shadow: 0 2px 2px -1px rgba(0, 0, 0, 0.4);
}

.c-trainer-check{
  margin: 0 auto;
  text-align: center;
}

.c-trainer-check input[type=checkbox]{
  width: 16px;
  height: 16px;
  appearance: none;
  border-radius: 50%;
  background-color: #fc6565;
  opacity: 0.7;
  margin-top: 10px;
}

.c-trainer-check input[type=checkbox].changed{
  animation: zoomInAndOut 3s forwards;
}

.c-trainer-check input[type=checkbox].is-checked{
  background-color: #47b047;
}

.textbook-section-table .exercise-active,  .textbook-section-table .exercise-disabled{
  text-align: center;
  font-size: 18px;
  padding: 15px 0px;
}

.textbook-section-table .exercise-active{
  color: green;
}

.textbook-section-table .exercise-disabled{
  color: red;
}


@keyframes zoomInAndOut {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}


@media (max-width: 768px){
  .c-exams-by-subject{
    grid-template-columns: 1fr;
  }
}


@media (max-width: 1403px){
  .c-exams-by-subject .exams-container table{
    display: inline-table;
  }
  .c-exams-by-subject .exams-container:nth-child(odd) table{
    border-right: none;
  }
}