/* Smart lesson discovery
   The controller progressively enhances the existing lesson filters, so the
   catalog remains usable if the search index or JavaScript is unavailable. */

.lesson-search-shell {
  position: relative;
  min-width: 0;
}

.lesson-search-shell > .filter-field {
  width: 100%;
}

.lesson-search-shell > label {
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
}

.lesson-search-shell .filter-field > span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.lesson-search-shell .filter-field > span::after {
  content: "Titles, sections, examples & formulas";
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

#lesson-search[role="combobox"] {
  padding-right: 42px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%23667085' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E");
  background-position: right 13px center;
  background-repeat: no-repeat;
  background-size: 18px;
}

.lesson-search-privacy {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 10.75px;
  line-height: 1.4;
}

.lesson-search-privacy a {
  font-weight: 600;
}

.lesson-search-options {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
}

.lesson-search-options > .lesson-search-privacy {
  max-width: 430px;
  margin-top: 17px;
  text-align: right;
}

.lesson-search-suggestions {
  position: static;
  width: 100%;
  overflow: hidden auto;
  max-height: min(390px, 56vh);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  box-shadow: 0 18px 46px rgba(15, 42, 67, .18);
}

.library-tools.lesson-search-suggestions-open {
  align-items: start;
}

@media (min-width: 981px) {
  .library-tools.lesson-search-suggestions-open > .filter-toggle,
  .library-tools.lesson-search-suggestions-open > .clear-filters {
    margin-top: 25px;
  }
}

.lesson-search-suggestion-heading {
  margin: 0;
  padding: 11px 14px 7px;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.lesson-search-suggestion {
  display: grid;
  width: 100%;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 11px 14px;
  border: 0;
  border-top: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.lesson-search-suggestion:hover,
.lesson-search-suggestion[aria-selected="true"] {
  background: var(--tint);
}

.lesson-search-suggestion:focus-visible {
  position: relative;
  outline: 2px solid var(--teal);
  outline-offset: -2px;
}

.lesson-search-suggestion-copy {
  min-width: 0;
}

.lesson-search-suggestion-title,
.lesson-search-suggestion-context {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-search-suggestion-title {
  font-size: 13.5px;
  font-weight: 650;
}

.lesson-search-suggestion-context {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11.5px;
}

.lesson-search-suggestion-kind {
  color: var(--teal);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
}

.lesson-search-modes {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  align-items: center;
  padding: 14px 0 2px;
}

.lesson-search-mode-label {
  margin-right: 3px;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 650;
}

.lesson-search-mode {
  min-height: 31px;
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink-soft);
  font: 600 11.5px/1 'Work Sans', Arial, sans-serif;
  cursor: pointer;
  transition: border-color .16s ease, background-color .16s ease, color .16s ease;
}

.lesson-search-mode:hover {
  border-color: var(--teal);
  color: var(--teal-dark);
}

.lesson-search-mode[aria-pressed="true"] {
  border-color: var(--teal);
  background: var(--teal);
  color: #fff;
}

html[data-theme="dark"] .lesson-search-mode[aria-pressed="true"] {
  color: #071b22;
}

.lesson-search-index-notice {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin: 13px 0 0;
  padding: 10px 12px;
  border-left: 3px solid var(--amber);
  background: var(--tint);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.lesson-search-results {
  padding: 22px 0 8px;
}

.lesson-search-results-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
  margin-bottom: 13px;
}

.lesson-search-results-kicker {
  margin: 0 0 4px;
  color: var(--teal);
  font-size: 10.5px;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.lesson-search-results-title {
  margin: 0;
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: clamp(22px, 2.8vw, 29px);
  font-weight: 600;
  line-height: 1.2;
}

.lesson-search-results-title q {
  color: var(--teal-dark);
}

.lesson-search-results-list {
  display: grid;
  gap: 13px;
}

.lesson-search-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  box-shadow: 0 8px 24px rgba(15, 42, 67, .055);
}

.lesson-search-card::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: var(--teal);
  content: "";
}

.lesson-search-card-header {
  padding: 20px 22px 17px 25px;
}

.lesson-search-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  align-items: center;
  margin: 0 0 7px;
  color: var(--muted);
  font-size: 10.75px;
  font-weight: 650;
  letter-spacing: .025em;
  text-transform: uppercase;
}

.lesson-search-card-meta span + span::before {
  margin-right: 12px;
  color: var(--line);
  content: "•";
}

.lesson-search-card-title {
  margin: 0;
  font-size: clamp(19px, 2.3vw, 23px);
  line-height: 1.28;
}

.lesson-search-card-title a {
  color: var(--ink);
}

.lesson-search-card-title a:hover {
  color: var(--teal-dark);
}

.lesson-search-card-description {
  max-width: 850px;
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.lesson-search-hit-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.lesson-search-hit {
  position: relative;
}

.lesson-search-hit + .lesson-search-hit {
  border-top: 1px solid var(--line);
}

.lesson-search-hit-link {
  display: block;
  padding: 14px 50px 15px 25px;
  color: var(--ink);
  transition: background-color .16s ease;
}

.lesson-search-hit-link::after {
  position: absolute;
  top: 50%;
  right: 22px;
  color: var(--teal);
  font-size: 19px;
  line-height: 1;
  transform: translateY(-50%);
  transition: transform .16s ease;
  content: "→";
}

.lesson-search-hit-link:hover,
.lesson-search-hit-link:focus-visible {
  background: var(--tint);
  color: var(--ink);
}

.lesson-search-hit-link:hover::after {
  transform: translate(3px, -50%);
}

.lesson-search-hit-topline {
  display: flex;
  gap: 9px;
  align-items: center;
  margin-bottom: 4px;
}

.lesson-search-hit-kind {
  display: inline-flex;
  flex: none;
  align-items: center;
  min-height: 20px;
  padding: 3px 7px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--teal) 12%, transparent);
  color: var(--teal-dark);
  font-size: 9.5px;
  font-weight: 750;
  letter-spacing: .055em;
  text-transform: uppercase;
}

.lesson-search-hit-heading {
  overflow: hidden;
  font-size: 13px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-search-hit-breadcrumb {
  overflow: hidden;
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 10.75px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-search-hit-excerpt {
  display: -webkit-box;
  overflow: hidden;
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.55;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.lesson-search-results mark,
.lesson-search-suggestions mark {
  border-radius: 2px;
  background: color-mix(in srgb, var(--amber) 30%, transparent);
  color: inherit;
  font-weight: 700;
}

.lesson-search-more {
  width: 100%;
  min-height: 40px;
  padding: 9px 20px;
  border: 0;
  border-top: 1px solid var(--line);
  background: var(--tint);
  color: var(--teal-dark);
  font: 700 11.5px/1.2 'Work Sans', Arial, sans-serif;
  cursor: pointer;
}

.lesson-search-more:hover {
  text-decoration: underline;
}

.lesson-search-load-more {
  justify-self: center;
  margin-top: 8px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--ink);
  font: 650 12.5px/1.2 'Work Sans', Arial, sans-serif;
  cursor: pointer;
}

.lesson-search-empty-copy {
  max-width: 620px;
  margin-right: auto !important;
  margin-left: auto !important;
  line-height: 1.55;
}

.lesson-search-recovery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 17px auto 0;
}

.lesson-search-recovery-label {
  flex-basis: 100%;
  margin: 0;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 650;
}

.lesson-search-recovery button {
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--teal-dark);
  font: 650 11.5px/1.2 'Work Sans', Arial, sans-serif;
  cursor: pointer;
}

.lesson-search-recovery button:hover {
  border-color: var(--teal);
  background: var(--tint);
}

html[data-theme="dark"] .lesson-search-suggestions,
html[data-theme="dark"] .lesson-search-card {
  box-shadow: 0 14px 34px rgba(0, 0, 0, .25);
}

html[data-theme="dark"] #lesson-search[role="combobox"] {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%23a9b6c8' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E");
}

@media (max-width: 980px) {
  .library-tools > .lesson-search-shell {
    grid-column: 1 / -1;
  }

}

@media (max-width: 700px) {
  .library-tools > .lesson-search-shell {
    grid-column: auto;
  }

  .lesson-search-shell .filter-field > span::after {
    display: none;
  }

  .lesson-search-modes {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 5px;
    scrollbar-width: thin;
  }

  .lesson-search-options {
    flex-direction: column;
    gap: 0;
  }

  .lesson-search-options > .lesson-search-privacy {
    margin-top: 4px;
    text-align: left;
  }

  .lesson-search-mode-label,
  .lesson-search-mode {
    flex: none;
  }

  .lesson-search-results-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }

  .lesson-search-card-header {
    padding: 18px 18px 15px 21px;
  }

  .lesson-search-hit-link {
    padding: 14px 42px 15px 21px;
  }

  .lesson-search-hit-link::after {
    right: 17px;
  }

  .lesson-search-card-meta span + span::before {
    margin-right: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lesson-search-mode,
  .lesson-search-hit-link,
  .lesson-search-hit-link::after {
    transition: none;
  }
}

@media (forced-colors: active) {
  .lesson-search-card::before {
    background: Highlight;
  }

  .lesson-search-mode[aria-pressed="true"] {
    border-color: Highlight;
    background: Highlight;
    color: HighlightText;
  }
}