.content-header {
  margin-bottom: 20px;
  padding: 8px 12px;

  h2 {
    position: relative;
    font-size: 24px;
    margin: 0;
    padding: 5px 10px;

    @media (max-width: 768px) {
      font-size: 18px;
    }
  }

  h2::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid #fff;
    padding: 20px;
    width: 100%;
  }
}

.content-header__obi {
  background-color: #3593df;
  color: #fff;
  font-weight: bold;
}

.content-content {
  padding: 12px;
}

.study-manual {
  .manual-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;

    li {
      min-width: 150px;
      padding: 4px 0;
      color: #666;
    }

    a {
      color: #3593df;
    }

    a.underline:before {
      background-color: #3593df;
    }
  }
}

.lesson-curriculum {
  .content-wrapper {
    padding-top: 0;
  }

  .lesson-list {
    .lesson-item {
      padding: 10px;
      border-bottom: 1px solid #ccc;
      display: flex;
      justify-content: space-between;

      @media (max-width: 768px) {
        flex-direction: column;
      }

      .lesson-time {
        padding: 2px 5px;
        background: #666;
        color: #fff;
        font-size: 14px;
        align-self: flex-start;
        display: inline-block;
        width: auto;
        min-width: 80px;
        text-align: center;

        @media (max-width: 768px) {
          align-self: flex-end;
          margin-top: 4px;
          font-size: 12px;
        }
      }
    }

    .lesson-item:hover {
      background-color: #eee;
    }
  }
}