.library-page > .navbar .nav-item:first-child > .nav-link::after,
.exercise-detail-page > .navbar .nav-item:first-child > .nav-link::after {
  display: none;
}

.library-page > .navbar .nav-link.active,
.exercise-detail-page > .navbar .nav-link.active {
  color: var(--catalog-coral-dark);
}

.library-page > .navbar .nav-link.active::after,
.exercise-detail-page > .navbar .nav-link.active::after {
  position: absolute;
  right: 12px;
  bottom: 5px;
  left: 12px;
  display: block;
  height: 2px;
  border-radius: 99px;
  content: "";
  background: var(--catalog-coral-dark);
}

.library-hero,
.exercise-detail-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(23, 63, 66, 0.08);
  background:
    radial-gradient(circle at 9% 10%, rgba(221, 194, 142, 0.34), transparent 25%),
    linear-gradient(180deg, var(--catalog-paper-light), var(--catalog-paper));
}

.library-hero::after,
.exercise-detail-hero::after {
  position: absolute;
  right: -80px;
  bottom: -170px;
  width: 340px;
  height: 340px;
  border: 1px solid rgba(23, 63, 66, 0.08);
  border-radius: 50%;
  content: "";
}

.library-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 40px;
  align-items: end;
  padding-top: clamp(46px, 6vw, 76px);
  padding-bottom: clamp(42px, 5vw, 66px);
}

.library-hero h1,
.exercise-detail-hero h1,
.library-results__header h2,
.exercise-detail-content__heading h2 {
  margin: 0;
  color: var(--catalog-ink-deep);
  font-family: "Fraunces", "Fraunces Fallback", Georgia, serif;
  font-weight: 700;
  letter-spacing: -0.04em;
  text-wrap: balance;
}

.library-hero h1 {
  font-size: clamp(2.75rem, 5.6vw, 5.4rem);
  line-height: 0.98;
}

.library-hero__inner > div:first-child > p:last-child {
  max-width: 730px;
  margin: 17px 0 0;
  color: var(--catalog-muted);
  font-size: clamp(1rem, 1.4vw, 1.12rem);
}

.library-hero__count {
  display: grid;
  min-width: 154px;
  padding: 18px 22px;
  border: 1px solid var(--catalog-line);
  border-radius: 20px;
  background: rgba(255, 253, 248, 0.84);
  box-shadow: 0 14px 40px rgba(23, 63, 66, 0.08);
}

.library-hero__count strong {
  color: var(--catalog-ink);
  font-family: "Fraunces", "Fraunces Fallback", Georgia, serif;
  font-size: 2.5rem;
  line-height: 1;
}

.library-hero__count span {
  margin-top: 6px;
  color: var(--catalog-muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.library-workspace {
  padding-top: 34px;
  padding-bottom: 88px;
}

.library-filters {
  display: grid;
  grid-template-columns: minmax(270px, 1.25fr) minmax(170px, 0.7fr) minmax(210px, 0.8fr) auto;
  gap: 18px;
  align-items: end;
  padding: 20px;
  border: 1px solid var(--catalog-line);
  border-radius: 22px;
  background: var(--catalog-paper-light);
  box-shadow: 0 16px 48px rgba(23, 63, 66, 0.07);
}

.library-filters__heading {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 13px;
  align-items: center;
}

.library-filters__heading > span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 13px;
  background: var(--catalog-lemon);
  color: var(--catalog-ink-deep);
}

.library-filters__heading h2 {
  margin: 0;
  color: var(--catalog-ink-deep);
  font-size: 1rem;
  font-weight: 800;
}

.library-filters__heading p {
  margin: 3px 0 0;
  color: var(--catalog-muted);
  font-size: 0.77rem;
  line-height: 1.4;
}

.library-filter-field {
  display: grid;
  gap: 6px;
}

.library-filter-field label {
  color: var(--catalog-muted);
  font-size: 0.71rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.library-filter-field select {
  width: 100%;
  min-height: 46px;
  padding: 9px 36px 9px 12px;
  border: 1px solid var(--catalog-line);
  border-radius: 12px;
  background-color: #fff;
  color: var(--catalog-ink-deep);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 650;
}

.library-filters__actions {
  display: flex;
  gap: 10px;
  align-items: center;
  min-height: 46px;
}

.library-filters__actions button,
.library-primary-link,
.library-empty__actions a {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--catalog-ink);
  border-radius: 999px;
  background: var(--catalog-ink);
  color: #fff !important;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 800;
  line-height: 1.15;
  text-decoration: none;
  white-space: nowrap;
}

.library-filters__actions button:hover,
.library-primary-link:hover,
.library-empty__actions a:hover {
  border-color: var(--catalog-coral-dark);
  background: var(--catalog-coral-dark);
}

.library-filters__actions > a {
  color: var(--catalog-coral-dark);
  font-size: 0.78rem;
  font-weight: 800;
  white-space: nowrap;
  text-underline-offset: 3px;
}

.library-results {
  padding-top: 38px;
}

.library-results__header {
  display: flex;
  gap: 30px;
  align-items: end;
  justify-content: space-between;
}

.library-results__header h2,
.exercise-detail-content__heading h2 {
  font-size: clamp(2rem, 3.5vw, 3.3rem);
  line-height: 1.05;
}

.library-results__header > p {
  margin: 0;
  color: var(--catalog-muted);
  font-size: 0.85rem;
}

.library-results__header > p strong {
  color: var(--catalog-ink-deep);
  font-size: 1.15rem;
}

.library-card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.library-card-grid .catalog-exercise-card {
  min-height: 390px;
}

.catalog-exercise-card__public {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  padding: 4px 8px;
  border: 1px solid rgba(23, 63, 66, 0.15);
  border-radius: 999px;
  background: rgba(229, 233, 154, 0.75);
  color: var(--catalog-ink-deep);
  font-size: 0.66rem;
  font-weight: 800;
}

.library-card-grid .catalog-exercise-card__footer > div {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.library-empty__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.library-empty__actions a:last-child {
  border-color: var(--catalog-line);
  background: transparent;
  color: var(--catalog-ink-deep) !important;
}

.exercise-detail-hero > .catalog-shell {
  position: relative;
  z-index: 1;
  padding-top: 30px;
  padding-bottom: 52px;
}

.exercise-detail-back {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 34px;
  color: var(--catalog-ink-deep);
  font-size: 0.8rem;
  font-weight: 800;
  text-decoration: none;
}

.exercise-detail-back:hover {
  color: var(--catalog-coral-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.exercise-detail-hero__topline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 15px;
  color: var(--catalog-muted);
  font-size: 0.76rem;
  font-weight: 750;
}

.exercise-detail-hero__topline > span:not(.exercise-detail-type),
.exercise-detail-hero__topline time {
  padding: 5px 9px;
  border: 1px solid var(--catalog-line);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.7);
}

.exercise-detail-type {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--catalog-blue);
  color: var(--catalog-ink-deep);
  font-weight: 800;
}

.exercise-detail-hero h1 {
  max-width: 900px;
  font-size: clamp(2.35rem, 5vw, 4.75rem);
  line-height: 1.01;
}

.exercise-detail-hero h1 + p {
  max-width: 760px;
  margin: 16px 0 0;
  color: var(--catalog-muted);
  font-size: 1rem;
}

.exercise-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 22px 0 0;
}

.exercise-detail-meta > div {
  padding: 8px 11px;
  border-radius: 10px;
  background: rgba(221, 194, 142, 0.25);
}

.exercise-detail-meta dt,
.exercise-detail-meta dd {
  display: inline;
  margin: 0;
  font-size: 0.76rem;
}

.exercise-detail-meta dt {
  color: var(--catalog-muted);
  font-weight: 650;
}

.exercise-detail-meta dt::after {
  content: ": ";
}

.exercise-detail-meta dd {
  color: var(--catalog-ink-deep);
  font-weight: 800;
}

.exercise-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.exercise-detail-action {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 17px;
  border: 1px solid var(--catalog-ink);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 800;
  text-decoration: none;
}

.exercise-detail-action--primary {
  background: var(--catalog-ink);
  color: #fff !important;
}

.exercise-detail-action--secondary {
  color: var(--catalog-ink-deep);
}

.exercise-detail-action:hover {
  border-color: var(--catalog-coral-dark);
  background: var(--catalog-coral-dark);
  color: #fff;
}

.exercise-detail-public {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  margin: 22px 0 0 !important;
  padding: 9px 12px;
  border-radius: 11px;
  background: rgba(183, 216, 202, 0.55);
  color: var(--catalog-ink-deep) !important;
  font-size: 0.78rem !important;
  font-weight: 750;
}

.exercise-detail-content {
  padding-top: 46px;
  padding-bottom: 90px;
}

.exercise-detail-content__heading {
  margin-bottom: 22px;
}

.exercise-detail-sheet {
  overflow: hidden;
  padding: clamp(24px, 5vw, 62px);
  border: 1px solid var(--catalog-line);
  border-radius: 26px;
  background: var(--catalog-paper-light);
  box-shadow: var(--catalog-shadow);
}

.exercise-sheet-content {
  min-width: 0;
  color: var(--catalog-ink-deep);
}

.exercise-sheet-content h2 {
  margin: 0 0 20px;
  font-family: "Fraunces", "Fraunces Fallback", Georgia, serif;
  font-size: clamp(1.65rem, 3vw, 2.5rem);
  letter-spacing: -0.025em;
}

.exercise-sheet-content h3 {
  margin: 0 0 12px;
  font-size: 0.95rem;
  font-weight: 800;
}

.exercise-sheet-content__reading {
  font-family: Georgia, serif;
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  line-height: 1.85;
}

.exercise-question-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.exercise-question-grid section,
.exercise-sheet-content__answers {
  padding: 19px;
  border-radius: 16px;
  background: rgba(221, 194, 142, 0.18);
}

.exercise-question-grid ol,
.exercise-sheet-content__answers ol {
  margin: 0;
  padding-left: 1.35rem;
}

.exercise-question-grid li,
.exercise-sheet-content__answers li,
.problem-list li,
.sentence-list li,
.relation-columns li {
  margin-bottom: 10px;
  line-height: 1.65;
}

.exercise-sheet-content .sum-preview {
  gap: 34px;
  justify-content: center;
}

.exercise-sheet-content__empty {
  margin: 0;
  color: var(--catalog-muted);
  text-align: center;
}

@media (max-width: 1099.98px) {
  .library-filters {
    grid-template-columns: minmax(250px, 1fr) repeat(2, minmax(180px, 0.7fr));
  }

  .library-filters__actions {
    grid-column: 2 / -1;
    justify-content: flex-end;
  }

  .library-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767.98px) {
  .library-hero__inner {
    grid-template-columns: 1fr;
    gap: 24px;
    align-items: start;
  }

  .library-hero__count {
    width: max-content;
    min-width: 132px;
  }

  .library-filters {
    grid-template-columns: 1fr 1fr;
  }

  .library-filters__heading {
    grid-column: 1 / -1;
  }

  .library-filters__actions {
    grid-column: 1 / -1;
  }

  .exercise-question-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 599.98px) {
  .library-hero__inner,
  .library-workspace,
  .exercise-detail-hero > .catalog-shell,
  .exercise-detail-content {
    width: min(100% - 28px, 1240px);
  }

  .library-filters,
  .library-card-grid {
    grid-template-columns: 1fr;
  }

  .library-filter-field,
  .library-filters__actions {
    grid-column: 1;
  }

  .library-filters__actions {
    align-items: stretch;
    flex-direction: column;
  }

  .library-filters__actions button {
    width: 100%;
  }

  .library-results__header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .library-card-grid .catalog-exercise-card__footer > div,
  .library-empty__actions {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
  }

  .exercise-detail-actions,
  .exercise-detail-action {
    width: 100%;
  }

  .exercise-detail-sheet {
    padding: 20px 16px;
    border-radius: 18px;
  }

  .exercise-sheet-content .sum-preview {
    gap: 22px;
  }

  .relation-columns > div + div {
    margin-top: 22px;
  }
}