/* HSKBase Grammar — warm education-platform layer
   HSK-BASE-009 / HSK-BASE-010 */

body[data-page="grammar"].multipage-site.prototype-v2 {
  --grammar-edu-ink: #24324a;
  --grammar-edu-muted: #657086;
  --grammar-edu-primary: #4869a8;
  --grammar-edu-primary-strong: #36558f;
  --grammar-edu-success: #3f7a62;
  --grammar-edu-green: var(--grammar-edu-primary);
  --grammar-edu-cream: #fff7ef;
  --grammar-edu-paper: #fffdf9;
  --grammar-edu-blue: #dce8f8;
  --grammar-edu-mint: #e8e6f4;
  --grammar-edu-yellow: #f7dfa1;
  --grammar-edu-peach: #f8dfd2;
  --grammar-edu-coral: #c96847;
  --grammar-edu-line: #d5d9e2;
  --grammar-edu-shadow: 0 8px 0 rgba(36, 50, 74, 0.07);
  --grammar-workspace-ink: var(--grammar-edu-ink);
  --grammar-workspace-muted: var(--grammar-edu-muted);
  --grammar-workspace-green: var(--grammar-edu-primary);
  --grammar-workspace-green-deep: var(--grammar-edu-primary-strong);
  --grammar-green: var(--grammar-edu-primary);
  --grammar-green-dark: var(--grammar-edu-primary-strong);
  --grammar-black: var(--grammar-edu-ink);
  --grammar-black-soft: #19253a;
  color: var(--grammar-edu-ink);
  background: var(--grammar-edu-cream);
}

body[data-page="grammar"].multipage-site.prototype-v2 main,
body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product {
  background: var(--grammar-edu-cream);
}

body[data-page="grammar"].multipage-site.prototype-v2 :focus-visible {
  outline: 3px solid rgba(72, 105, 168, 0.34);
  outline-offset: 3px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .site-header .button--dark,
body[data-page="grammar"].multipage-site.prototype-v2 .button--brand {
  border-color: var(--grammar-edu-primary-strong);
  color: #fff;
  background: var(--grammar-edu-primary);
}

body[data-page="grammar"].multipage-site.prototype-v2 .site-header .button--dark:hover,
body[data-page="grammar"].multipage-site.prototype-v2 .button--brand:hover {
  color: #fff;
  background: var(--grammar-edu-primary-strong);
  box-shadow: 0 5px 0 rgba(54, 85, 143, 0.16);
}

body[data-page="grammar"].multipage-site.prototype-v2 .desktop-nav__primary[aria-current="page"] {
  border-color: var(--grammar-edu-coral);
  color: var(--grammar-edu-primary-strong);
}

body[data-page="grammar"].multipage-site.prototype-v2 .exam-context-bar {
  border-color: #e2c987;
  color: #4f421e;
  background: var(--grammar-edu-yellow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .exam-context-bar a {
  color: var(--grammar-edu-ink);
}

/* Open, outcome-led module hero */
body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero {
  padding: 22px 0 44px;
  border: 0;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-breadcrumb,
body[data-page="grammar"].multipage-site.prototype-v2 .seo-breadcrumb a {
  color: #6c7974;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__grid {
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.54fr);
  gap: clamp(36px, 6vw, 82px);
  align-items: center;
  padding: 26px 0 4px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__eyebrow {
  color: #8b482f;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero h1 {
  max-width: 850px;
  color: var(--grammar-edu-ink);
  font-family: "Plus Jakarta Sans", Inter, "Noto Sans SC", sans-serif;
  font-size: clamp(46px, 4.8vw, 66px);
  font-weight: 780;
  letter-spacing: -0.055em;
  line-height: 0.98;
  text-wrap: balance;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero h1 em {
  display: block;
  margin-top: 12px;
  color: var(--grammar-edu-coral);
  font: inherit;
  font-size: 0.38em;
  font-weight: 720;
  letter-spacing: -0.02em;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__lead {
  max-width: 720px;
  color: var(--grammar-edu-muted);
  font-size: 15px;
  line-height: 1.7;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  color: var(--grammar-edu-ink);
  background: transparent;
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts::before,
body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts::after {
  display: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span {
  min-width: 0;
  min-height: 72px;
  padding: 16px 20px;
  border: 1.5px solid #68758c;
  border-radius: 16px;
  color: var(--grammar-edu-ink);
  background: var(--grammar-edu-blue);
  box-shadow: var(--grammar-edu-shadow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(2) {
  margin-left: 18px;
  background: var(--grammar-edu-yellow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(3) {
  margin-right: 18px;
  background: var(--grammar-edu-mint);
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span + span {
  border: 1.5px solid #68758c;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts small,
body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts strong {
  color: var(--grammar-edu-ink);
}

/* Module switch and learning workspace */
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__switch {
  top: var(--site-header-height, 72px);
  gap: 8px;
  padding: 8px;
  border: 1px solid #bfc6d3;
  border-radius: 18px;
  background: rgba(255, 253, 249, 0.96);
  box-shadow: var(--grammar-edu-shadow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__switch a {
  min-height: 48px;
  border-radius: 11px;
  color: #586a64;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__switch a:hover {
  color: var(--grammar-edu-ink);
  background: #fff0df;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__switch a[aria-current="page"] {
  color: #8b482f;
  background: var(--grammar-edu-peach);
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 410px);
  align-items: end;
  gap: clamp(32px, 5vw, 72px);
  padding: 50px 0 24px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary h2 {
  color: var(--grammar-edu-ink);
  font-family: "Plus Jakarta Sans", Inter, "Noto Sans SC", sans-serif;
  font-size: clamp(38px, 4.4vw, 58px);
  font-weight: 760;
  letter-spacing: -0.045em;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary p,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary > strong {
  color: var(--grammar-edu-muted);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary-tools {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid #c6ccda;
  border-radius: 18px;
  background: rgba(255, 253, 249, 0.94);
  box-shadow: 0 12px 30px rgba(36, 50, 74, 0.07);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__progress-card {
  display: grid;
  gap: 12px;
  padding: 14px 15px;
  border-radius: 13px;
  background: var(--grammar-edu-blue);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__progress-card > span:first-child {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__progress-card small {
  color: var(--grammar-edu-primary-strong);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__progress-card strong {
  color: var(--grammar-edu-ink);
  font-size: 12px;
  font-weight: 760;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__progress-track {
  display: block;
  height: 7px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.84);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__progress-track > i {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--grammar-edu-coral);
  transition: width 220ms ease;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__search {
  display: grid;
  min-height: 54px;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 13px;
  padding: 0 15px;
  border: 1px solid #d7dbe4;
  border-radius: 13px;
  background: #fff;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__search:focus-within {
  border-color: var(--grammar-edu-primary);
  box-shadow: 0 0 0 4px rgba(72, 105, 168, 0.1);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__search > span {
  color: var(--grammar-edu-primary-strong);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__search input {
  min-width: 0;
  border: 0;
  outline: 0;
  color: var(--grammar-edu-ink);
  background: transparent;
  font: 600 13px/1.2 Inter, "Noto Sans SC", sans-serif;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__search input::placeholder {
  color: #8992a3;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__workspace {
  overflow: hidden;
  border: 1px solid #bfc6d3;
  border-radius: 22px;
  background: var(--grammar-edu-paper);
  box-shadow: var(--grammar-edu-shadow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__category-rail {
  overflow: hidden;
  border: 0;
  border-bottom: 1px solid #c9cfdb;
  background: #f0eef8;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__category-rail .grammar-category-nav__heading {
  min-height: 54px;
  padding: 16px 20px 8px;
  border: 0;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__category-rail .grammar-category-nav__heading span {
  color: var(--grammar-edu-ink);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: -0.01em;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__category-rail .grammar-category-nav__heading small {
  color: var(--grammar-edu-muted);
  font-size: 10px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  padding: 0 12px 14px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button {
  min-width: 0;
  min-height: 76px;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  gap: 8px;
  padding: 11px 12px;
  border: 1px solid #d4d8e2;
  border-radius: 13px;
  color: #626d82;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button::before {
  display: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button strong {
  display: -webkit-box;
  overflow: hidden;
  font-size: 11px;
  line-height: 1.35;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:hover {
  border-color: #9eabc1;
  color: var(--grammar-edu-ink);
  background: #fff;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button.is-active {
  border-color: #dfa28f;
  border-radius: 13px;
  color: var(--grammar-edu-ink);
  background: var(--grammar-edu-peach);
  box-shadow: inset 0 0 0 1px var(--grammar-edu-coral);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__layout {
  min-height: 720px;
  grid-template-columns: minmax(280px, 330px) minmax(0, 1fr);
  border: 0;
  border-radius: 0;
  background: var(--grammar-edu-paper);
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__directory {
  display: block;
  border-color: #c9cfdb;
  border-right: 1px solid #c9cfdb;
  background: #f5f4fa;
}

body[data-page="grammar"].multipage-site.prototype-v2 [data-grammar-topics],
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list {
  border-color: rgba(72, 82, 112, 0.2);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button {
  min-height: 68px;
  border-color: rgba(72, 82, 112, 0.14);
  color: #626d82;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button:hover {
  color: var(--grammar-edu-ink);
  background: rgba(255, 253, 249, 0.72);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button.is-active {
  border-radius: 11px;
  color: var(--grammar-edu-ink);
  background: var(--grammar-edu-peach);
  box-shadow: inset 3px 0 var(--grammar-edu-coral);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list__heading {
  min-height: 72px;
  padding: 18px 20px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list {
  max-height: calc(100% - 72px);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__lesson {
  color: var(--grammar-edu-ink);
  background: var(--grammar-edu-paper);
  padding-right: clamp(36px, 4vw, 58px);
  padding-left: clamp(36px, 4vw, 58px);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-lesson__head h2,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-lesson__section h3 {
  color: var(--grammar-edu-ink);
  font-family: "Plus Jakarta Sans", Inter, "Noto Sans SC", sans-serif;
  font-weight: 740;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-lesson__head,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-lesson__section,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-content-block + .grammar-content-block {
  border-color: var(--grammar-edu-line);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model {
  border: 1px solid var(--grammar-edu-primary-strong);
  border-radius: 18px;
  color: #fff;
  background: var(--grammar-edu-primary-strong);
  box-shadow: var(--grammar-edu-shadow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model strong {
  color: #fff;
  font-family: "Plus Jakarta Sans", Inter, "Noto Sans SC", sans-serif;
  font-weight: 650;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model em {
  color: var(--grammar-edu-yellow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model > div > span,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model__pronunciation em > span {
  color: #dbe5f7;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model small {
  color: #f0f4fb;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model button {
  border-color: rgba(255, 255, 255, 0.38);
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model button:hover,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model button:focus-visible {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.18);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model button,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-lesson__footer button,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-lesson__footer .button {
  min-height: 44px;
  border-radius: 11px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid > div,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid > div {
  border: 1px solid #9ca7ba;
  border-radius: 14px;
  color: var(--grammar-edu-ink);
  background: var(--grammar-edu-blue);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid > div:nth-child(even),
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid > div:nth-child(2),
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid > div:nth-child(5) {
  background: var(--grammar-edu-yellow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid > div:nth-child(3),
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid > div:nth-child(3n) {
  background: var(--grammar-edu-mint);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-mistake > span {
  border: 1px solid #9ca7ba;
  border-radius: 14px;
  background: var(--grammar-edu-peach);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-mistake > span + span,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-mistake > span:last-child {
  border: 1px solid #9ca7ba;
  background: var(--grammar-edu-blue);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-lesson__footer a {
  min-height: 44px;
  border: 1px solid var(--grammar-edu-ink);
  border-radius: 11px;
  color: #fff;
  background: var(--grammar-edu-primary);
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-lesson__footer {
  position: static;
  margin-top: 30px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next {
  border: 1.5px solid var(--grammar-edu-ink);
  border-radius: 18px;
  color: var(--grammar-edu-ink);
  background: var(--grammar-edu-yellow);
  box-shadow: var(--grammar-edu-shadow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next .button {
  min-height: 44px;
  border: 1px solid var(--grammar-edu-ink);
  border-radius: 11px;
  color: #fff;
  background: var(--grammar-edu-primary);
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next .button:hover {
  color: #fff;
  background: var(--grammar-edu-primary-strong);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button.is-complete i {
  border-color: var(--grammar-edu-success);
  background: var(--grammar-edu-success);
}

@media (max-width: 980px) {
  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__grid,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__layout,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary {
    grid-template-columns: minmax(0, 1fr);
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(2),
  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(3) {
    margin: 0;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__directory {
    border-right: 0;
    border-bottom: 1px solid #bfc6d3;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items {
    display: flex;
    gap: 9px;
    overflow-x: auto;
    padding: 0 14px 15px;
    overscroll-behavior-inline: contain;
    scrollbar-width: none;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items::-webkit-scrollbar {
    display: none;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button {
    min-width: 220px;
    min-height: 64px;
    flex: 0 0 220px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list {
    max-height: 320px;
  }
}

@media (max-width: 700px) {
  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero {
    padding: 16px 0 34px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__grid {
    gap: 20px;
    padding-top: 22px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero h1 {
    font-size: clamp(40px, 12vw, 54px);
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 7px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span {
    min-height: 86px;
    padding: 12px 9px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts small {
    font-size: 8px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts strong {
    font-size: 11px;
    line-height: 1.35;
    overflow-wrap: anywhere;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(2),
  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(3) {
    margin: 0;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary {
    padding-top: 38px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary h2 {
    font-size: 38px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary-tools {
    padding: 10px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__search {
    grid-template-columns: 1fr;
    gap: 4px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__layout {
    border-radius: 0;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__workspace {
    border-radius: 16px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__category-rail .grammar-category-nav__heading {
    padding: 15px 16px 8px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button {
    min-width: 205px;
    flex-basis: 205px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__lesson {
    padding: 28px 22px 36px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-mistake {
    grid-template-columns: 1fr;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next {
    grid-template-columns: 1fr;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next > span,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next > strong,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next > p,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next > a {
    grid-column: 1;
    grid-row: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions button.is-playing .ph {
    animation: none;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 a,
  body[data-page="grammar"].multipage-site.prototype-v2 button {
    transition: none;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__progress-track > i {
    transition: none;
  }
}

/* Spacious homepage-inspired information hierarchy */
body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 14px;
  border: 1.5px solid #bfc6d3;
  border-radius: 24px;
  background: var(--grammar-edu-paper);
  box-shadow: var(--grammar-edu-shadow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span {
  min-height: 104px;
  justify-content: flex-end;
  padding: 18px;
  border: 0;
  border-radius: 15px;
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(2),
body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(3) {
  margin: 0;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(3) {
  min-height: 82px;
  grid-column: 1 / -1;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 380px);
  align-items: center;
  gap: clamp(42px, 6vw, 86px);
  margin-top: 56px;
  padding: 42px;
  border: 1.5px solid #bfc6d3;
  border-radius: 28px;
  background: var(--grammar-edu-paper);
  box-shadow: var(--grammar-edu-shadow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary-copy {
  max-width: 760px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary h2 {
  max-width: 720px;
  text-wrap: balance;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary p {
  max-width: 680px;
  line-height: 1.75;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary-tools {
  gap: 12px;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__progress-card {
  min-height: 94px;
  justify-content: center;
  padding: 18px;
  border: 1px solid rgba(104, 117, 140, 0.36);
  border-radius: 15px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__search {
  min-height: 62px;
  border-color: #bfc6d3;
  border-radius: 15px;
  background: var(--grammar-edu-cream);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__workspace {
  display: grid;
  gap: 28px;
  margin-top: 34px;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__category-rail {
  padding: 24px;
  overflow: visible;
  border: 1.5px solid #bfc6d3;
  border-radius: 24px;
  background: var(--grammar-edu-paper);
  box-shadow: var(--grammar-edu-shadow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__category-rail .grammar-category-nav__heading {
  min-height: 0;
  padding: 0 3px 18px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding: 0;
  overflow: visible;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button {
  min-width: 0;
  min-height: 112px;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto minmax(0, 1fr);
  align-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  border: 1.5px solid #9ca7ba;
  border-radius: 17px;
  color: var(--grammar-edu-ink);
  background: var(--grammar-edu-peach);
  box-shadow: 4px 5px 0 rgba(36, 50, 74, 0.06);
  text-align: left;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:nth-child(2),
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:nth-child(6) {
  background: var(--grammar-edu-mint);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:nth-child(3) {
  background: var(--grammar-edu-yellow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:nth-child(4) {
  background: var(--grammar-edu-blue);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:nth-child(5) {
  background: #f4eee5;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button > span {
  grid-column: 1;
  grid-row: 1;
  color: var(--grammar-edu-primary-strong);
  font-size: 10px;
  font-weight: 760;
  letter-spacing: 0.08em;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button strong {
  display: block;
  grid-column: 1 / -1;
  grid-row: 2;
  align-self: end;
  overflow: visible;
  color: var(--grammar-edu-ink);
  font-size: 15px;
  line-height: 1.32;
  -webkit-line-clamp: initial;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button small {
  grid-column: 2;
  grid-row: 1;
  color: var(--grammar-edu-muted);
  font-size: 11px;
  font-weight: 700;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:hover {
  border-color: var(--grammar-edu-primary);
  background: var(--grammar-edu-paper);
  transform: translateY(-2px);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button.is-active {
  border-color: var(--grammar-edu-coral);
  border-radius: 17px;
  background: var(--grammar-edu-peach);
  box-shadow: inset 0 0 0 1px var(--grammar-edu-coral), 4px 5px 0 rgba(201, 104, 71, 0.1);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__layout {
  min-height: 760px;
  grid-template-columns: minmax(250px, 290px) minmax(0, 1fr);
  overflow: hidden;
  border: 1.5px solid #bfc6d3;
  border-radius: 24px;
  background: var(--grammar-edu-paper);
  box-shadow: var(--grammar-edu-shadow);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__directory {
  border-color: #c9cfdb;
  background: #f2f0f8;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button {
  min-height: 74px;
  padding-right: 18px;
  padding-left: 18px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__lesson {
  padding: 52px clamp(44px, 5vw, 72px) 58px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model {
  margin-top: 30px;
  border-radius: 20px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-section {
  margin-top: 38px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid {
  gap: 18px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next {
  margin-top: 36px;
  padding: 34px 38px;
  border-radius: 22px;
}

@media (max-width: 980px) {
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary {
    grid-template-columns: minmax(0, 1fr);
    align-items: stretch;
    gap: 30px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary-tools {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    overflow: visible;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button {
    min-width: 0;
    min-height: 104px;
    flex: initial;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 700px) {
  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    padding: 10px;
    border-radius: 19px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span {
    min-height: 88px;
    padding: 14px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(3) {
    min-height: 72px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary {
    margin-top: 30px;
    padding: 26px 20px;
    border-radius: 22px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary-tools {
    grid-template-columns: minmax(0, 1fr);
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__workspace {
    gap: 20px;
    margin-top: 22px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__category-rail {
    padding: 18px;
    border-radius: 19px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items {
    display: flex;
    gap: 12px;
    margin-inline: -18px;
    padding: 0 18px 5px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: inline proximity;
    scrollbar-width: none;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items::-webkit-scrollbar {
    display: none;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button {
    min-width: min(260px, 78vw);
    min-height: 108px;
    flex: 0 0 min(260px, 78vw);
    scroll-snap-align: start;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__layout {
    border-radius: 19px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__lesson {
    padding: 34px 22px 42px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-model {
    margin-top: 24px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-section {
    margin-top: 30px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next {
    padding: 28px 24px;
    border-radius: 19px;
  }
}

/* Grammar cards: one reversible study card plus visible deck depth. */
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 24px;
  padding: 22px;
  overflow: visible;
  border: 1.5px solid #2d4778;
  border-radius: 24px;
  background: var(--grammar-edu-primary-strong);
  box-shadow: 7px 8px 0 rgba(54, 85, 143, 0.16);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card {
  position: relative;
  min-width: 0;
  margin: 0 14px 14px 0;
  perspective: 1400px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card::before,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card::after {
  position: absolute;
  border: 1.5px solid rgba(104, 117, 140, 0.72);
  border-radius: 19px;
  content: "";
  pointer-events: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card::before {
  z-index: 0;
  inset: 8px -8px -8px 8px;
  background: var(--grammar-edu-mint);
  transform: rotate(0.65deg);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card::after {
  z-index: 1;
  inset: 14px -14px -14px 14px;
  background: var(--grammar-edu-yellow);
  transform: rotate(1.15deg);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip {
  position: relative;
  z-index: 2;
  display: block;
  width: 100%;
  min-height: 320px;
  padding: 0;
  border: 0;
  border-radius: 19px;
  color: inherit;
  background: transparent;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__inner {
  position: relative;
  display: grid;
  min-height: inherit;
  margin: 0;
  color: inherit;
  font-size: inherit;
  letter-spacing: normal;
  transform-style: preserve-3d;
  transition: transform 480ms cubic-bezier(0.2, 0.74, 0.24, 1);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip.is-flipped .grammar-study-deck__inner {
  transform: rotateY(180deg);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__face {
  display: flex;
  min-width: 0;
  min-height: inherit;
  grid-area: 1 / 1;
  flex-direction: column;
  margin: 0;
  padding: 30px 32px;
  overflow: auto;
  border: 1.5px solid rgba(255, 255, 255, 0.42);
  border-radius: 19px;
  color: #fff;
  background: var(--grammar-edu-primary);
  box-shadow: 0 14px 34px rgba(19, 36, 70, 0.18);
  font-size: inherit;
  letter-spacing: normal;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__back {
  border-color: #8f99aa;
  color: var(--grammar-edu-ink);
  background: var(--grammar-edu-yellow);
  transform: rotateY(180deg);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__face > small:first-child {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.15em;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front > strong {
  max-width: 760px;
  margin: 34px 0 0;
  color: #fff;
  font-family: "Noto Serif SC", "Songti SC", Georgia, serif;
  font-size: clamp(34px, 4.2vw, 52px);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.22;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front > em[data-grammar-pinyin],
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front .grammar-model__pronunciation em {
  margin: 16px 0 0;
  padding: 0;
  color: var(--grammar-edu-yellow);
  font-size: 14px;
  font-style: normal;
  letter-spacing: 0;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front .grammar-model__pronunciation {
  margin-top: 16px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front .grammar-model__pronunciation em {
  margin-top: 0;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front .grammar-model__pronunciation em > span {
  margin: 0 0 4px;
  color: #dbe5f7;
  font-size: 9px;
  letter-spacing: 0.08em;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__translation {
  max-width: 680px;
  margin: 8px 0 0;
  color: #edf2fb;
  font-size: 13px;
  letter-spacing: 0;
  line-height: 1.6;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__face > em:last-child {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: max-content;
  margin: auto 0 0;
  padding-top: 22px;
  color: #fff;
  font-size: 11px;
  font-style: normal;
  font-weight: 720;
  letter-spacing: 0;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__back > small:first-child {
  color: #76501f;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__back > strong {
  margin: 24px 0 0;
  color: var(--grammar-edu-ink);
  font-family: "Plus Jakarta Sans", Inter, "Noto Sans SC", sans-serif;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 760;
  letter-spacing: -0.04em;
  line-height: 1.16;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__back > strong > span {
  display: block;
  margin: 7px 0 0;
  color: #8b482f;
  font-size: 0.55em;
  letter-spacing: 0;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__rule {
  margin: 19px 0 0;
  color: var(--grammar-edu-ink);
  font-size: 15px;
  letter-spacing: 0;
  line-height: 1.68;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__tip {
  margin: 17px 0 0;
  padding: 13px 15px;
  border: 1px solid rgba(104, 117, 140, 0.46);
  border-radius: 12px;
  color: #4f5868;
  background: rgba(255, 253, 249, 0.58);
  font-size: 12px;
  letter-spacing: 0;
  line-height: 1.55;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__tip > small {
  margin: 0 0 4px;
  color: #76501f;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__back > em:last-child {
  color: var(--grammar-edu-primary-strong);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip:hover .grammar-study-deck__front,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip:focus-visible .grammar-study-deck__front {
  border-color: #fff;
  box-shadow: 0 18px 40px rgba(19, 36, 70, 0.24);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip:focus-visible {
  outline: 3px solid rgba(247, 223, 161, 0.72);
  outline-offset: 5px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions {
  z-index: 3;
  align-items: stretch;
  flex-direction: column;
  padding-bottom: 14px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions button {
  min-width: 88px;
  min-height: 46px;
  justify-content: center;
  border-radius: 12px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions span {
  display: inline-block;
  margin: 0;
  color: inherit;
  font-size: inherit;
  letter-spacing: 0;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions .ph {
  display: inline-grid;
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  place-items: center;
  line-height: 1;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions .ph::before {
  display: block;
  line-height: 1;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions button.is-playing {
  border-color: var(--grammar-edu-primary);
  color: var(--grammar-edu-primary-strong);
  background: #edf3ff;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions button.is-playing .ph {
  animation: grammar-audio-pulse 1.1s ease-in-out infinite;
}

@keyframes grammar-audio-pulse {
  50% { transform: scale(0.88); }
}

/* The topic directory reads as a stack of selectable grammar cards. */
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list {
  display: grid;
  align-content: start;
  padding: 18px 14px 28px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button {
  position: relative;
  min-height: 78px;
  margin: 0;
  padding: 14px 16px;
  border: 1.5px solid #b7bfce;
  border-radius: 14px;
  color: var(--grammar-edu-ink);
  background: var(--grammar-edu-paper);
  box-shadow: 0 6px 0 rgba(36, 50, 74, 0.07);
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button + button {
  margin-top: -5px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button:nth-child(even) {
  transform: translateX(3px);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button:hover,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button:focus-visible {
  z-index: 4;
  border-color: var(--grammar-edu-primary);
  background: #fff;
  box-shadow: 0 9px 0 rgba(72, 105, 168, 0.1);
  transform: translateX(6px);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button.is-active {
  z-index: 5;
  border-color: var(--grammar-edu-coral);
  border-radius: 14px;
  background: var(--grammar-edu-peach);
  box-shadow: inset 3px 0 var(--grammar-edu-coral), 0 9px 0 rgba(201, 104, 71, 0.1);
  transform: translateX(7px);
}

/* Each explanation/examples collection sits on two visible sheets. */
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid {
  position: relative;
  z-index: 0;
  isolation: isolate;
  padding: 0 11px 11px 0;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid::before,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid::after,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid::before,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid::after,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid::before,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid::after {
  position: absolute;
  border: 1px solid #aab3c2;
  border-radius: 18px;
  content: "";
  pointer-events: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid::before,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid::before,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid::before {
  z-index: 0;
  inset: 7px 4px 4px 7px;
  background: var(--grammar-edu-mint);
  transform: rotate(0.45deg);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid::after,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid::after,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid::after {
  z-index: 1;
  inset: 11px 0 0 11px;
  background: var(--grammar-edu-yellow);
  transform: rotate(0.8deg);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid > .grammar-flip-card,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid > .grammar-flip-card,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid > .grammar-flip-card {
  position: relative;
  z-index: 2;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card__face {
  border-color: #9ca7ba;
  box-shadow: 0 8px 0 rgba(36, 50, 74, 0.07);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card--rule .grammar-flip-card__front,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card--example .grammar-flip-card__front {
  background: var(--grammar-edu-blue);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card--mistake .grammar-flip-card__front,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card--note .grammar-flip-card__front {
  background: var(--grammar-edu-peach);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card__back {
  border-color: #2d4778;
  background: var(--grammar-edu-primary-strong);
}

@media (max-width: 980px) {
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck {
    grid-template-columns: minmax(0, 1fr);
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions {
    flex-direction: row;
    padding: 0 14px 0 0;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions button {
    min-width: 0;
    flex: 1 1 0;
  }
}

@media (max-width: 700px) {
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck {
    padding: 16px;
    border-radius: 20px;
    box-shadow: 5px 6px 0 rgba(54, 85, 143, 0.15);
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card {
    margin: 0 9px 9px 0;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card::before {
    inset: 5px -5px -5px 5px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card::after {
    inset: 9px -9px -9px 9px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip {
    min-height: 370px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__face {
    padding: 24px 22px;
    border-radius: 16px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front > strong {
    margin-top: 28px;
    font-size: clamp(30px, 9.5vw, 40px);
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__back > strong {
    font-size: 25px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__rule {
    font-size: 14px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions {
    padding-right: 9px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list {
    padding: 16px 11px 26px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button {
    min-height: 76px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid {
    padding: 0 7px 7px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__inner {
    transition-duration: 0.01ms;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button:hover,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button:focus-visible {
    transition: none;
  }
}

/* Refined grammar workspace: one calm surface, no simulated card piles. */
body[data-page="grammar"].multipage-site.prototype-v2 {
  --grammar-edu-shadow: 0 18px 46px rgba(36, 50, 74, 0.08);
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero h1 {
  max-width: 720px;
  font-size: clamp(42px, 4.2vw, 56px);
  line-height: 1.04;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  padding: 8px;
  border: 1px solid var(--grammar-edu-line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 12px 34px rgba(36, 50, 74, 0.06);
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span,
body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(2),
body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(3) {
  min-height: 82px;
  margin: 0;
  padding: 14px 16px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span + span {
  border: 0;
  border-left: 1px solid var(--grammar-edu-line);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary {
  gap: clamp(28px, 4vw, 56px);
  margin-top: 40px;
  padding: 34px 36px;
  border: 1px solid var(--grammar-edu-line);
  border-radius: 20px;
  box-shadow: 0 14px 40px rgba(36, 50, 74, 0.06);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary h2 {
  font-size: clamp(32px, 3.5vw, 46px);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__category-rail {
  padding: 20px;
  border: 1px solid var(--grammar-edu-line);
  border-radius: 20px;
  box-shadow: 0 12px 34px rgba(36, 50, 74, 0.05);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items {
  gap: 10px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:nth-child(2),
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:nth-child(3),
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:nth-child(4),
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:nth-child(5),
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:nth-child(6) {
  min-height: 82px;
  padding: 14px 16px;
  border: 1px solid var(--grammar-edu-line);
  border-radius: 14px;
  background: #fff;
  box-shadow: none;
  transform: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button:hover {
  border-color: #9cacc8;
  background: #f8faff;
  transform: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button.is-active {
  border-color: #8fa5ce;
  border-radius: 14px;
  background: #eef3fb;
  box-shadow: inset 0 0 0 1px rgba(72, 105, 168, 0.18);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__layout {
  min-height: 720px;
  border: 1px solid var(--grammar-edu-line);
  border-radius: 20px;
  box-shadow: 0 18px 46px rgba(36, 50, 74, 0.07);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__directory {
  border-color: var(--grammar-edu-line);
  background: #f7f8fb;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid #d4dae5;
  border-radius: 18px;
  color: var(--grammar-edu-ink);
  background: #fff;
  box-shadow: 0 16px 42px rgba(36, 50, 74, 0.09);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card {
  min-width: 0;
  margin: 0;
  perspective: 1400px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card::before,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card::after {
  content: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip {
  min-height: 290px;
  border-radius: 0;
  color: var(--grammar-edu-ink);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__inner {
  transition-duration: 360ms;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__face {
  padding: 30px 32px;
  border: 0;
  border-radius: 0;
  color: var(--grammar-edu-ink);
  background: #fff;
  box-shadow: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__back {
  border: 0;
  color: var(--grammar-edu-ink);
  background: #f7f8fb;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__face > small:first-child,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__back > small:first-child {
  color: var(--grammar-edu-primary-strong);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front > strong {
  margin-top: 30px;
  color: var(--grammar-edu-ink);
  font-size: clamp(32px, 3.8vw, 46px);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front > em[data-grammar-pinyin],
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front .grammar-model__pronunciation em {
  color: var(--grammar-edu-primary-strong);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__front .grammar-model__pronunciation em > span {
  color: var(--grammar-edu-muted);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__translation {
  color: var(--grammar-edu-muted);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__face > em:last-child,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__back > em:last-child {
  color: var(--grammar-edu-primary-strong);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__tip {
  border-color: #d7deea;
  color: #4f5c72;
  background: #fff;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__tip > small {
  color: var(--grammar-edu-primary-strong);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip:hover .grammar-study-deck__front,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip:focus-visible .grammar-study-deck__front {
  border-color: transparent;
  box-shadow: inset 0 0 0 1px #b9c7df;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip:focus-visible {
  outline-color: rgba(72, 105, 168, 0.42);
  outline-offset: -4px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions {
  z-index: 3;
  display: flex;
  align-items: center;
  flex-direction: row;
  gap: 8px;
  padding: 12px 14px;
  border-top: 1px solid var(--grammar-edu-line);
  background: #fafbfc;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions button {
  min-width: 0;
  min-height: 44px;
  justify-content: center;
  padding-inline: 16px;
  border: 1px solid #d3d9e4;
  border-radius: 10px;
  color: var(--grammar-edu-ink);
  background: #fff;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions button:hover,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions button:focus-visible {
  border-color: #9cacc8;
  color: var(--grammar-edu-primary-strong);
  background: #f3f6fb;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list {
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 16px 14px 24px;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button + button,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button:nth-child(even) {
  min-height: 72px;
  margin: 0;
  padding: 13px 15px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: transparent;
  box-shadow: none;
  transform: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button:hover,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button:focus-visible {
  border-color: #d2d9e5;
  background: #fff;
  box-shadow: none;
  transform: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list button.is-active {
  border-color: #c5d1e4;
  border-radius: 12px;
  background: #eef3fb;
  box-shadow: inset 3px 0 var(--grammar-edu-primary);
  transform: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid {
  padding: 0;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid::before,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid::after,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid::before,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid::after,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid::before,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid::after {
  content: none;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card__face {
  border-color: #d5dbe5;
  background: #fff;
  box-shadow: 0 8px 24px rgba(36, 50, 74, 0.06);
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card--rule .grammar-flip-card__front,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card--example .grammar-flip-card__front,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card--mistake .grammar-flip-card__front,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card--note .grammar-flip-card__front {
  background: #fff;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-flip-card__back {
  border-color: #c8d1df;
  color: var(--grammar-edu-ink);
  background: #f5f7fa;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-mistake > span,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-mistake > span + span,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-mistake > span:last-child {
  border-color: #d8dde6;
  background: #f7f8fa;
}

body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__next {
  border: 1px solid var(--grammar-edu-line);
  background: #fff;
  box-shadow: 0 14px 40px rgba(36, 50, 74, 0.06);
}

@media (max-width: 980px) {
  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button {
    min-height: 78px;
  }
}

@media (max-width: 700px) {
  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero h1 {
    font-size: clamp(36px, 10vw, 44px);
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding: 6px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span,
  body[data-page="grammar"].multipage-site.prototype-v2 .seo-hero__facts > span:nth-child(3) {
    min-height: 72px;
    padding: 10px 8px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__summary {
    padding: 24px 20px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-product__category-rail {
    padding: 16px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items {
    margin-inline: -16px;
    padding-inline: 16px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-category-nav__items button {
    min-width: min(232px, 76vw);
    min-height: 78px;
    flex-basis: min(232px, 76vw);
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck {
    padding: 0;
    border-radius: 16px;
    box-shadow: 0 12px 32px rgba(36, 50, 74, 0.09);
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__card {
    margin: 0;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__flip {
    min-height: 330px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck__face {
    padding: 24px 22px;
    border-radius: 0;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions {
    padding: 10px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-study-deck .grammar-model__actions button {
    flex: 1 1 0;
    padding-inline: 8px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-topic-list {
    padding: 14px 11px 22px;
  }

  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-explanation-grid,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-note-grid,
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-example-grid {
    padding: 0;
  }
}

/* HSK-BASE-003/010/011: read the rule first, disclose detail, recall examples. */
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-rule,
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-context {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid #e3d7cf;
  border-radius: 20px;
  background: #fffaf5;
}
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-rule { border-left: 4px solid #ad3930; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-context { background: #fff; }
body[data-page="grammar"].multipage-site.prototype-v2 :is(.grammar-reading-rule, .grammar-reading-context) h3 { margin: 6px 0 12px; color: #292426; font-size: 22px; }
body[data-page="grammar"].multipage-site.prototype-v2 :is(.grammar-reading-rule, .grammar-reading-context) > p { margin: 0; font-size: 16px; line-height: 1.75; color: #4e4444; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-rule .grammar-rule { white-space: normal; overflow-wrap: anywhere; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0 0 16px; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-comparison > div { padding: 16px; border-radius: 12px; background: #f3eff8; color: #59406f; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-comparison > div:last-child { background: #eaf3ef; color: #285b49; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-comparison small { display: block; font-size: 11px; font-weight: 700; letter-spacing: .08em; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-comparison p { margin: 8px 0 0; font-size: 19px; line-height: 1.65; overflow-wrap: anywhere; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-note { border-bottom: 1px solid #e3d7cf; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-note summary { min-height: 48px; padding: 14px 4px; color: #3e3336; cursor: pointer; font-weight: 600; line-height: 1.5; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-note summary:hover { color: #96362d; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-note p { margin: 0; padding: 0 4px 18px; color: #5c5051; font-size: 16px; line-height: 1.75; overflow-wrap: anywhere; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-note summary:focus-visible { outline: 3px solid #aa3f34; outline-offset: 3px; border-radius: 4px; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-source { margin-top: 24px; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-source summary { font-size: 14px; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-examples .grammar-example-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-examples .grammar-flip-card__button { min-height: 0; height: auto; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-examples .grammar-flip-card__inner { min-height: 170px; height: auto; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-examples .grammar-flip-card__face { padding: 18px; height: auto; overflow: visible; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-examples .grammar-flip-card__front > strong { font-size: 23px; line-height: 1.6; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-examples .grammar-flip-card__front > em { margin-top: 18px; }
body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-examples .grammar-flip-card__back { background: #f2eef7; color: #473354; }
@media (max-width: 1100px) {
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-examples .grammar-example-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  body[data-page="grammar"].multipage-site.prototype-v2 .grammar-reading-comparison { grid-template-columns: 1fr; }
}