.workbook-category-back {
  margin: 0 0 18px;
}

.workbook-category-back a {
  color: #146b9f;
  font-weight: 800;
  text-decoration: none;
}

.workbook-method,
.workbook-jump {
  margin: 20px 0;
  padding: 24px;
  border: 1px solid #d9e4ec;
  border-radius: 18px;
  background: #fff;
}

.workbook-method h2 {
  margin: 0 0 12px;
  color: #123e60;
  font-size: 1.28rem;
}

.workbook-method p {
  margin: 8px 0 0;
  color: #43576a;
  line-height: 1.75;
}

.workbook-jump > strong {
  display: block;
  margin-bottom: 12px;
  color: #123e60;
}

.workbook-jump > div {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 7px;
}

.workbook-jump a {
  display: grid;
  min-height: 38px;
  place-items: center;
  border: 1px solid #cbdce8;
  border-radius: 10px;
  color: #165f90;
  font-weight: 800;
  text-decoration: none;
}

.workbook-jump a:hover,
.workbook-jump a:focus-visible {
  border-color: #1e83bd;
  background: #edf8ff;
}

.workbook-questions {
  display: grid;
  gap: 20px;
  margin: 26px 0 70px;
}

.workbook-question {
  scroll-margin-top: 24px;
  padding: 28px;
  border: 1px solid #d8e3eb;
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(30, 72, 100, .06);
}

.workbook-question-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 13px;
}

.workbook-number,
.workbook-concept {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 900;
}

.workbook-number {
  background: #125d8b;
  color: #fff;
}

.workbook-concept {
  background: #edf3f7;
  color: #496071;
}

.workbook-question h2 {
  margin: 0 0 20px;
  color: #102f46;
  font-size: 1.2rem;
  line-height: 1.55;
  word-break: keep-all;
}

.workbook-choices {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: workbook-choice;
}

.workbook-choices li {
  position: relative;
  min-height: 48px;
  padding: 13px 14px 13px 50px;
  border: 1px solid #dde6ed;
  border-radius: 12px;
  color: #31485a;
  line-height: 1.55;
  counter-increment: workbook-choice;
}

.workbook-choices li::before {
  content: counter(workbook-choice);
  position: absolute;
  top: 10px;
  left: 12px;
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: #edf5fa;
  color: #126897;
  font-weight: 900;
}

.workbook-answer-space {
  min-height: 110px;
  padding: 14px;
  border: 1px dashed #bfd0db;
  border-radius: 12px;
  color: #758593;
  background: repeating-linear-gradient(#fff, #fff 34px, #e8eef2 35px);
}

.workbook-solution {
  margin-top: 18px;
  border-top: 1px solid #e1e9ef;
}

.workbook-solution summary {
  cursor: pointer;
  padding: 17px 2px 0;
  color: #0f6f9e;
  font-weight: 900;
}

.workbook-solution-body {
  margin-top: 16px;
  padding: 20px;
  border-radius: 14px;
  background: #f4f8fb;
  color: #324a5c;
}

.workbook-solution-body p {
  line-height: 1.7;
}

.workbook-correct {
  margin: 0 0 14px;
  color: #0d5d3b;
}

.workbook-model-answer,
.workbook-scoring,
.workbook-explanation {
  margin-top: 14px;
}

.workbook-model-answer p,
.workbook-explanation p {
  margin: 7px 0 0;
}

.workbook-scoring ul {
  margin: 8px 0 0;
  padding-left: 21px;
}

.workbook-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.workbook-sources strong {
  flex-basis: 100%;
}

.workbook-sources a {
  padding: 7px 10px;
  border-radius: 9px;
  background: #fff;
  color: #176a9a;
  font-size: .86rem;
  font-weight: 700;
  text-decoration: none;
}

@media (max-width: 760px) {
  .workbook-jump > div {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .workbook-question {
    padding: 21px 17px;
    border-radius: 16px;
  }

  .workbook-question h2 {
    font-size: 1.06rem;
  }

  .workbook-solution-body {
    padding: 16px;
  }
}