.content-discovery,
.content-index-main {
  --content-forest: #17372d;
  --content-muted: #587068;
  --content-line: rgba(16, 37, 31, 0.14);
}

.content-discovery {
  padding-top: 112px;
  padding-bottom: 124px;
}

.content-discovery-heading,
.content-index-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.55fr);
  gap: 64px;
  align-items: end;
}

.content-discovery h2,
.content-index-intro h1 {
  margin: 0;
  font: 600 clamp(42px, 5vw, 66px) / 0.98 var(--serif);
  letter-spacing: -0.055em;
}

.content-discovery h2 em,
.content-index-intro h1 em {
  color: #759d58;
  font-weight: 500;
}

.content-discovery-heading > p,
.content-index-intro > p {
  margin: 0 0 7px;
  color: var(--content-muted);
  font-size: 17px;
}

.content-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 34px 0 28px;
}

.content-filter-panel {
  display: grid;
  gap: 22px;
  margin: 42px 0 30px;
  padding: 26px;
  border: 1px solid var(--content-line);
  border-radius: 26px;
  background: rgba(255, 253, 248, 0.76);
}

.content-filter-panel .content-filters {
  margin: 8px 0 0;
}

.content-filter-row {
  display: grid;
  gap: 8px;
}

.content-filter-row > strong {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.content-search {
  width: 100%;
  min-height: 52px;
  padding: 12px 16px;
  border: 1px solid var(--content-line);
  border-radius: 14px;
  background: white;
  color: var(--content-forest);
  font: 600 15px var(--sans);
}

.content-search:focus-visible {
  outline: 3px solid #b9d588;
  outline-offset: 2px;
}

.content-result-count {
  margin: 0;
  color: var(--content-muted);
  font-size: 13px;
  font-weight: 700;
}

.content-filters button {
  min-height: 42px;
  padding: 9px 17px;
  border: 1px solid var(--content-line);
  border-radius: 999px;
  background: transparent;
  color: var(--content-forest);
  font: 800 13px var(--sans);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, transform 0.2s;
}

.content-filters button:hover,
.content-filters button:focus-visible {
  transform: translateY(-1px);
  border-color: var(--content-forest);
}

.content-filters button[aria-pressed="true"] {
  background: var(--content-forest);
  color: #fff;
}

.content-filters button:focus-visible {
  outline: 3px solid #b9d588;
  outline-offset: 3px;
}

.content-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.content-card {
  overflow: hidden;
  border: 1px solid var(--content-line);
  border-radius: 28px;
  background: #fffdf8;
  box-shadow: 0 22px 52px rgba(16, 37, 31, 0.09);
}

.content-card[hidden] {
  display: none;
}

.content-card-media {
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 10;
  padding: 17px;
  overflow: hidden;
  background: #eef1ea;
}

.content-card-illustration {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border: 1px solid rgba(16, 37, 31, 0.08);
  border-radius: 21px;
  isolation: isolate;
  transition: transform 0.45s ease;
}

.content-card:hover .content-card-illustration {
  transform: translateY(-3px) scale(1.012);
}

.content-card-fallback-image {
  display: block;
  width: 100%;
  height: 100%;
  padding: 10px;
  border-radius: 19px;
  object-fit: contain;
  background: #fff;
}

.illustration-screen-lock {
  background: linear-gradient(145deg, #ffd5b5 0 46%, #f36a65 46% 100%);
}

.illustration-reading-aloud {
  background: radial-gradient(circle at 88% 8%, #fff6bb 0 12%, transparent 12.5%), linear-gradient(145deg, #eaf8d7, #c9edb4);
}

.illustration-parent-dashboard {
  background: linear-gradient(145deg, #ded7ff, #b8a9ff);
}

.illustration-reading-comprehension {
  background: linear-gradient(145deg, #fff3c9, #ffe19a);
}

.illustration-tablet-rules {
  background: linear-gradient(145deg, #dce9ff, #c8d2ff 58%, #dcd6ff);
}

.illustration-reading-motivation {
  background: radial-gradient(circle at 88% 8%, #ffd7b8 0 14%, transparent 14.5%), linear-gradient(145deg, #fff0d9, #dff1c9);
}

.illustration-memory-practice {
  background: linear-gradient(145deg, #dcefff, #dcd6ff 58%, #f4e9ff);
}

.illustration-learning-rewards {
  background: radial-gradient(circle at 12% 92%, #fff0a8 0 16%, transparent 16.5%), linear-gradient(145deg, #dcf3cc, #c4e9ba);
}

.illustration-learning-path,
.illustration-learning-start,
.illustration-learning-motivation {
  background: radial-gradient(circle at 88% 8%, #fff1a8 0 13%, transparent 13.5%), linear-gradient(145deg, #e4f5cf, #c7e8b8);
}

.illustration-screen-balance,
.illustration-auto-lock {
  background: linear-gradient(145deg, #dce9ff, #c8d2ff 58%, #f3d7ff);
}

.illustration-learn-unlock {
  background: linear-gradient(145deg, #ffd6b8 0 43%, #f4776d 43% 100%);
}

.illustration-preschool,
.illustration-letters {
  background: radial-gradient(circle at 10% 92%, #ffd6b8 0 15%, transparent 15.5%), linear-gradient(145deg, #fff4c7, #d9efbd);
}

.illustration-multiplication {
  background: linear-gradient(145deg, #d9efff, #c9d9ff 58%, #e1d8ff);
}

.illustration-english-vocabulary {
  background: linear-gradient(145deg, #ffe7bd, #ffd2c7 58%, #e8d7ff);
}

.illustration-progress-dashboard {
  background: linear-gradient(145deg, #dcefd0, #afd8b4 58%, #c7e3dc);
}

.thumb-orbit {
  position: absolute;
  right: -22px;
  top: -35px;
  width: 165px;
  height: 165px;
  border: 20px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
}

.thumb-device,
.thumb-learning-card,
.thumb-dashboard,
.thumb-reading-card,
.thumb-rules-card,
.thumb-progress-card,
.thumb-float-chip {
  position: absolute;
  z-index: 1;
  box-shadow: 0 16px 34px rgba(28, 51, 43, 0.15);
  font-family: var(--sans);
}

.thumb-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: #52665f;
  font: 800 8px/1.2 var(--mono);
  letter-spacing: 0.05em;
}

.thumb-topline i {
  color: #759d58;
  font-style: normal;
}

.thumb-lock-device {
  left: 22px;
  top: 14px;
  display: flex;
  width: 48%;
  min-width: 148px;
  height: calc(100% - 28px);
  flex-direction: column;
  align-items: center;
  padding: 15px 14px;
  border: 6px solid #17372d;
  border-radius: 21px;
  background: #f8f6ef;
  text-align: center;
}

.thumb-lock-device .thumb-topline {
  width: 100%;
}

.thumb-padlock {
  position: relative;
  display: block;
  width: 42px;
  height: 35px;
  margin: 28px auto 13px;
  border-radius: 11px;
  background: #f36a65;
}

.thumb-padlock::before {
  position: absolute;
  left: 9px;
  top: -20px;
  width: 18px;
  height: 24px;
  border: 4px solid #f36a65;
  border-bottom: 0;
  border-radius: 14px 14px 0 0;
  content: "";
}

.thumb-padlock::after {
  position: absolute;
  left: 18px;
  top: 13px;
  width: 6px;
  height: 10px;
  border-radius: 4px;
  background: #fff;
  content: "";
}

.thumb-lock-device strong {
  color: #17372d;
  font-size: 12px;
}

.thumb-lock-device small {
  color: #6e7d77;
  font-size: 9px;
}

.thumb-float-chip {
  right: 14px;
  bottom: 18px;
  padding: 9px 12px;
  border-radius: 11px;
  background: #fffdf8;
  color: #17372d;
  font-size: 9px;
  font-weight: 800;
}

.thumb-learning-card,
.thumb-reading-card,
.thumb-dashboard,
.thumb-rules-card {
  left: 6%;
  top: 15px;
  width: 88%;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.95);
}

.thumb-learning-card {
  width: 76%;
  height: 166px;
}

.thumb-learning-card > small {
  display: block;
  margin: 24px 0 10px;
  color: #4f7c43;
  font-size: 10px;
  font-weight: 800;
}

.thumb-word-row,
.thumb-answer-row,
.thumb-mode-row {
  display: flex;
  gap: 6px;
}

.thumb-word-row b {
  padding: 8px 10px;
  border: 1px solid #d7ded8;
  border-radius: 10px;
  background: #fff;
  color: #17372d;
  font-size: 12px;
}

.thumb-word-row b:first-child {
  border: 2px solid #f3a840;
  padding: 7px 9px;
  background: #fff4bd;
  color: #df741c;
}

.thumb-listening {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  color: #d9584f;
  font-size: 9px;
  font-weight: 800;
}

.thumb-listening i {
  width: 8px;
  height: 8px;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.thumb-progress-card {
  right: 13px;
  bottom: 13px;
  display: grid;
  width: 105px;
  gap: 5px;
  padding: 10px;
  border-radius: 12px;
  background: #fffdf8;
}

.thumb-progress-card b,
.thumb-progress-card small {
  color: #425a51;
  font-size: 8px;
}

.thumb-progress-card i {
  height: 5px;
  overflow: hidden;
  border-radius: 5px;
  background: #e4eadf;
}

.thumb-progress-card i span {
  display: block;
  width: 67%;
  height: 100%;
  background: #759d58;
}

.thumb-dashboard {
  height: 174px;
}

.thumb-device-row {
  display: grid;
  grid-template-columns: 34px 1fr 24px;
  gap: 9px;
  align-items: center;
  margin: 18px 0 14px;
}

.thumb-device-row > i {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: #17372d;
  color: #d8f29b;
  font-size: 10px;
  font-style: normal;
  font-weight: 900;
}

.thumb-device-row span {
  display: grid;
}

.thumb-device-row small,
.thumb-stat-grid small {
  color: #788680;
  font-size: 8px;
}

.thumb-device-row strong {
  color: #17372d;
  font-size: 10px;
}

.thumb-device-row > b {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #d8f29b;
  color: #4f713a;
  font-size: 11px;
}

.thumb-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
}

.thumb-stat-grid > span {
  display: grid;
  gap: 2px;
  padding: 8px;
  border-radius: 10px;
  background: #f4f1ff;
}

.thumb-stat-grid strong {
  color: #4d438b;
  font-size: 10px;
}

.thumb-reading-card {
  top: 13px;
  height: calc(100% - 26px);
}

.thumb-reading-card > small {
  display: block;
  margin: 16px 0 11px;
  color: #4e5d57;
  font-size: 9px;
  line-height: 1.45;
}

.thumb-reading-card > strong {
  display: block;
  margin-bottom: 8px;
  color: #17372d;
  font-size: 11px;
}

.thumb-answer-row b {
  flex: 1;
  padding: 7px;
  border: 1px solid #ded7c1;
  border-radius: 9px;
  color: #52645d;
  font-size: 9px;
  text-align: center;
}

.thumb-answer-row .is-answer {
  border-color: #79a55d;
  background: #e6f4ca;
  color: #4e7139;
}

.thumb-rules-card {
  height: 176px;
}

.thumb-mode-row {
  margin: 17px 0 10px;
}

.thumb-mode-row b {
  flex: 1;
  padding: 6px 4px;
  border: 1px solid #dedfeb;
  border-radius: 8px;
  color: #69746f;
  font-size: 8px;
  text-align: center;
}

.thumb-mode-row .is-active {
  border-color: #7267da;
  background: #e7e3ff;
  color: #5447ba;
}

.thumb-rule-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 2px;
  border-top: 1px solid #e8e8ef;
}

.thumb-rule-row > span {
  display: grid;
}

.thumb-rule-row strong {
  color: #263b34;
  font-size: 9px;
}

.thumb-rule-row small {
  color: #87908c;
  font-size: 7px;
}

.thumb-rule-row > i {
  position: relative;
  width: 28px;
  height: 16px;
  border-radius: 20px;
  background: #d6d9dc;
}

.thumb-rule-row > i::after {
  position: absolute;
  left: 3px;
  top: 3px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: white;
  content: "";
}

.thumb-rule-row > i.is-on {
  background: #7568dd;
}

.thumb-rule-row > i.is-on::after {
  left: 15px;
}

.content-card-body {
  padding: 24px 24px 26px;
}

.content-category {
  display: inline-flex;
  margin: 0 0 12px;
  padding: 6px 10px;
  border-radius: 999px;
  font: 800 10px var(--mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.content-category-problem {
  background: #ffe2ce;
  color: #8d4c26;
}

.content-category-learning {
  background: #ebe5ff;
  color: #6553a6;
}

.content-category-feature {
  background: #dfefbd;
  color: #4e7139;
}

.content-card h3 {
  margin: 0 0 13px;
  font: 600 29px / 1.02 var(--serif);
  letter-spacing: -0.04em;
}

.content-card h3 a:hover {
  color: #5d8445;
}

.content-card-body > p:not(.content-category) {
  min-height: 76px;
  margin: 0 0 18px;
  color: var(--content-muted);
  font-size: 14px;
  line-height: 1.65;
}

.content-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 56px;
  margin-bottom: 18px;
}

.content-tags span {
  height: fit-content;
  padding: 5px 8px;
  border: 1px solid var(--content-line);
  border-radius: 8px;
  color: #587068;
  font-size: 10px;
  font-weight: 700;
}

.content-card-link,
.content-index-back {
  color: var(--content-forest);
  font-size: 13px;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.content-card-link span {
  margin-left: 6px;
  color: #759d58;
}

.content-empty {
  margin: 28px 0;
  color: var(--content-muted);
}

.content-index-page {
  background: var(--paper);
}

.home-page .site-nav,
.content-index-page .site-nav {
  gap: 22px;
  font-size: 13px;
}

.content-index-main {
  min-height: 70vh;
  padding-top: 72px;
  padding-bottom: 120px;
}

.category-overview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 44px 0 60px;
}

.category-overview-card {
  display: flex;
  min-height: 275px;
  flex-direction: column;
  padding: 27px;
  border: 1px solid var(--content-line);
  border-radius: 27px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.category-overview-card:hover,
.category-overview-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 22px 46px rgba(16, 37, 31, 0.11);
}

.category-overview-card:focus-visible {
  outline: 3px solid #759d58;
  outline-offset: 3px;
}

.category-overview-problem { background: #fff0e4; }
.category-overview-learning { background: #f0ebff; }
.category-overview-feature { background: #edf5d9; }

.category-overview-card > span {
  color: var(--content-muted);
  font: 700 10px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.category-overview-card h2 {
  margin: 26px 0 10px;
  font: 600 38px/1 var(--serif);
  letter-spacing: -0.04em;
}

.category-overview-card p {
  margin: 0 0 24px;
  color: var(--content-muted);
  font-size: 14px;
  line-height: 1.6;
}

.category-overview-card strong {
  margin-top: auto;
  font-size: 13px;
}

.category-overview-card i {
  margin-left: 6px;
  color: #759d58;
  font-style: normal;
}

.category-article {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 0 0 58px;
}

.category-article article {
  padding: 26px;
  border-top: 1px solid var(--content-line);
}

.category-article h2 {
  margin: 0 0 12px;
  font: 600 27px/1.05 var(--serif);
}

.category-article p {
  margin: 0;
  color: var(--content-muted);
  font-size: 14px;
}

.category-sibling-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.category-sibling-links a {
  padding: 9px 14px;
  border: 1px solid var(--content-line);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.content-index-back {
  display: inline-flex;
  margin-top: 25px;
}

.content-index-page .site-footer {
  border-top: 1px solid var(--content-line);
}

.content-noscript {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

@media (max-width: 900px) {
  .content-discovery-heading,
  .content-index-intro {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .content-card-grid {
    grid-template-columns: 1fr 1fr;
  }

  .category-overview-grid,
  .category-article {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .content-discovery,
  .content-index-main {
    padding-top: 76px;
    padding-bottom: 84px;
  }

  .content-card-grid {
    grid-template-columns: 1fr;
  }

  .content-card-media {
    aspect-ratio: 16 / 11;
  }

  .content-card-body > p:not(.content-category),
  .content-tags {
    min-height: 0;
  }

  .content-filter-panel {
    padding: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .content-card-illustration,
  .content-filters button {
    transition: none;
  }
}