/* Keep the V8 learning workspace composition consistent on touch devices. */
@media (min-width: 701px) and (max-width: 1024px) {
  .learning-layout {
    --learning-sidebar-width: clamp(178px, 22vw, 220px);
    display: block;
    min-height: 100vh;
  }

  .learning-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--learning-sidebar-width);
    height: 100vh;
    height: 100dvh;
    padding: clamp(12px, 1.8vw, 18px) clamp(8px, 1.4vw, 14px);
  }

  .learning-main {
    min-height: 100vh;
    margin-left: var(--learning-sidebar-width);
  }

  .learning-layout .app-shell {
    width: 100%;
    max-width: 1360px;
    padding: clamp(18px, 2.8vw, 30px) clamp(16px, 2.5vw, 26px) 52px;
  }

  .learning-nav-item {
    grid-template-columns: clamp(30px, 4vw, 38px) minmax(0, 1fr);
    gap: clamp(7px, 1vw, 11px);
    min-height: 50px;
    padding: 0 clamp(5px, 1vw, 10px);
    font-size: clamp(12px, 1.55vw, 15px);
  }

  .learning-nav-icon {
    width: clamp(29px, 4vw, 36px);
    height: clamp(30px, 4vw, 36px);
    font-size: clamp(16px, 2vw, 19px);
  }

  .learning-service-bar {
    right: clamp(10px, 1.6vw, 16px);
    max-width: calc(100% - 20px);
  }

  .partner-plan-paybar {
    left: var(--learning-sidebar-width);
  }
}

@media (max-width: 700px) {
  .learning-layout {
    --learning-sidebar-width: clamp(96px, 27vw, 148px);
    display: block;
    min-height: 100vh;
  }

  .learning-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    display: flex;
    flex-direction: column;
    width: var(--learning-sidebar-width);
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 10px 6px max(10px, env(safe-area-inset-bottom));
  }

  .learning-brand {
    display: grid;
    justify-items: center;
    width: 100%;
    flex: 0 0 auto;
    padding: 3px 0 12px;
  }

  .learning-brand-mark {
    width: 30px;
    height: 30px;
    font-size: 11px;
  }

  .learning-brand small {
    display: block;
    margin-top: 5px;
    color: #f3c94f;
    font-size: clamp(9px, 2.6vw, 12px);
    font-weight: 800;
    line-height: 1.2;
  }

  .learning-nav {
    display: grid;
    flex: 1 0 auto;
    align-content: start;
    gap: 4px;
    overflow: visible;
  }

  .learning-nav-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 22px auto;
    justify-items: center;
    gap: 2px;
    width: 100%;
    min-height: clamp(43px, 7.2vh, 52px);
    flex: 0 0 auto;
    padding: 3px 2px;
    font-size: clamp(9px, 2.45vw, 12px);
    line-height: 1.18;
    text-align: center;
    white-space: normal;
  }

  .learning-nav-icon {
    width: 25px;
    height: 22px;
    font-size: 16px;
  }

  .learning-nav-divider {
    width: auto;
    height: 1px;
    flex: 0 0 auto;
    margin: 5px 8px;
  }

  .learning-sidebar-foot {
    display: none;
  }

  .learning-main {
    width: auto;
    min-width: 0;
    min-height: 100vh;
    margin-left: var(--learning-sidebar-width);
    overflow-x: clip;
  }

  .learning-layout .app-shell {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 18px clamp(10px, 3vw, 18px) 42px;
  }

  .learning-main:has(.learning-service-bar.is-home) .app-shell {
    padding-top: 14px;
  }

  .learning-service-bar {
    position: sticky;
    top: 0;
    right: auto;
    justify-content: flex-start;
    max-width: 100%;
    overflow-x: auto;
    padding: 7px 9px;
  }

  .learning-service-bar button {
    min-height: 34px;
    padding: 0 8px;
    font-size: 11px;
  }

  .learning-service-toast {
    top: 60px;
    right: 10px;
    left: 10px;
    max-width: none;
  }

  .partner-plan-paybar {
    left: var(--learning-sidebar-width);
    padding-right: max(12px, env(safe-area-inset-right));
    padding-left: 12px;
  }

  .resource-editor-link {
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
  }
}

@media (max-width: 360px) {
  .learning-layout {
    --learning-sidebar-width: 92px;
  }

  .learning-nav-item {
    font-size: 9px;
  }

  .learning-layout .app-shell {
    padding-right: 9px;
    padding-left: 9px;
  }
}

@media (max-height: 480px) and (max-width: 700px) {
  .learning-sidebar {
    padding-top: 6px;
  }

  .learning-brand {
    padding-bottom: 6px;
  }

  .learning-nav-item {
    min-height: 40px;
    grid-template-rows: 18px auto;
    padding-top: 1px;
    padding-bottom: 1px;
  }

  .learning-nav-icon {
    height: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .learning-nav-item,
  .learning-service-bar button {
    scroll-behavior: auto;
    transition-duration: 0.01ms;
  }
}

/* iPad and other touch-first tablets: keep the desktop information architecture,
   but size its cards to the space left beside the fixed learning navigation. */
@media (min-width: 701px) and (max-width: 1366px),
       (pointer: coarse) and (min-width: 701px) and (max-width: 1600px) {
  html,
  body {
    height: auto;
    min-height: 100%;
  }

  #app {
    min-height: 100vh;
    min-height: 100dvh;
  }

  .learning-layout {
    --learning-sidebar-width: clamp(174px, 18vw, 224px);
    display: block;
    height: auto;
    min-height: 100vh;
    min-height: 100dvh;
  }

  .learning-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--learning-sidebar-width);
    height: 100vh;
    height: 100dvh;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-bottom: max(14px, env(safe-area-inset-bottom));
  }

  .learning-brand,
  .learning-nav-icon,
  .learning-brand-mark,
  .brand-logo,
  .circle-action,
  .quiz-home-mark {
    flex: 0 0 auto;
  }

  .learning-nav-icon {
    aspect-ratio: 1;
  }

  .learning-nav {
    flex: 1 0 auto;
    align-content: start;
  }

  .learning-main {
    width: auto;
    min-width: 0;
    min-height: 100vh;
    min-height: 100dvh;
    height: auto;
    margin-left: var(--learning-sidebar-width);
    overflow: visible;
  }

  .learning-layout .app-shell {
    width: 100%;
    max-width: 1440px;
    padding: clamp(16px, 2.2vw, 28px) clamp(14px, 2vw, 24px)
      max(56px, calc(28px + env(safe-area-inset-bottom)));
  }

  /* Two columns in landscape retain comfortable text measures without
     letting desktop-sized cover art dominate each learning card. */
  .word-list,
  .home-book-grid,
  .quiz-book-grid,
  .quiz-book-grid:has(.has-quiz-portrait) {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(10px, 1.25vw, 16px);
  }

  .word-list-card.has-portrait-cover {
    grid-template-columns: minmax(96px, 112px) minmax(0, 1fr);
    min-height: 164px;
    gap: 8px 10px;
    padding: 10px;
  }

  .textbook-reading-filter {
    min-height: 44px;
  }

  .textbook-reading-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .textbook-reading-card {
    grid-template-columns: minmax(92px, 104px) minmax(0, 1fr);
    min-width: 0;
    gap: 8px;
    padding: 10px;
  }

  .textbook-reading-cover {
    width: 100%;
    min-height: 0;
    height: auto;
    aspect-ratio: 2 / 3;
  }

  .textbook-reading-card-body {
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .textbook-reading-card-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 5px;
  }

  .textbook-reading-card-actions .btn {
    min-width: 0;
    min-height: 44px;
    padding: 6px 5px;
    font-size: 12px;
    white-space: nowrap;
  }

  .textbook-reading-volume-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .textbook-reading-volume-card {
    display: grid;
    grid-template-columns: minmax(96px, 108px) minmax(0, 1fr);
    grid-template-rows: min-content min-content min-content 1fr;
    align-items: center;
    justify-content: initial;
    min-width: 0;
    min-height: 0;
    gap: 7px 10px;
    padding: 10px;
  }

  .textbook-reading-volume-card::before,
  .textbook-reading-volume-card::after {
    grid-column: 1;
    grid-row: 1 / span 4;
    width: 100%;
    min-height: 0;
    height: auto;
    aspect-ratio: 2 / 3;
  }

  .textbook-reading-volume-card .textbook-reading-volume-eyebrow,
  .textbook-reading-volume-card .textbook-reading-volume-title,
  .textbook-reading-volume-card .textbook-reading-volume-meta,
  .textbook-reading-volume-card .textbook-reading-volume-open {
    grid-column: 2;
    min-width: 0;
  }

  .textbook-reading-volume-card .textbook-reading-volume-eyebrow {
    grid-row: 1;
    align-self: end;
  }

  .textbook-reading-volume-card .textbook-reading-volume-title {
    grid-row: 2;
  }

  .textbook-reading-volume-card .textbook-reading-volume-title > strong {
    font-size: clamp(17px, 1.7vw, 21px);
  }

  .textbook-reading-volume-card .textbook-reading-volume-meta {
    grid-row: 3;
  }

  .textbook-reading-volume-card .textbook-reading-volume-open {
    grid-row: 4;
    justify-self: start;
    min-height: 44px;
    padding: 0 11px;
    font-size: 14px;
    white-space: nowrap;
  }

  .word-list-cover {
    width: 100%;
    min-height: 0;
    height: auto;
    aspect-ratio: 2 / 3;
    padding: 0;
    border: 0;
    appearance: none;
    color: inherit;
    font: inherit;
    text-align: left;
    cursor: pointer;
  }

  .word-list-cover:focus-visible {
    outline: 3px solid rgba(101, 91, 241, .55);
    outline-offset: 2px;
  }

  .word-list-cover-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .word-list-card.has-portrait-cover > div:not(.word-list-cover) {
    grid-column: 2;
    grid-row: 2;
    min-width: 0;
    padding: 0 3px 4px;
  }

  .word-list-card.has-portrait-cover .card-favorite,
  .book-card.has-modern-cover .card-favorite,
  .extension-card .card-favorite,
  .quiz-book-card.has-quiz-portrait .card-favorite {
    position: static;
    top: auto;
    right: auto;
    z-index: auto;
    margin: 0;
    min-width: 44px;
    min-height: 44px;
    white-space: nowrap;
  }

  .word-list-card.has-portrait-cover {
    grid-template-rows: auto minmax(0, 1fr) auto;
  }

  .word-list-card.has-portrait-cover > .word-list-cover {
    grid-column: 1;
    grid-row: 1 / span 3;
  }

  .word-list-card.has-portrait-cover > .card-favorite {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    align-self: center;
  }

  .word-list-card:not(.has-portrait-cover) > .card-favorite {
    position: static;
    top: auto;
    right: auto;
    z-index: auto;
    align-self: flex-end;
    flex: 0 0 auto;
    margin: 0;
    min-width: 44px;
    min-height: 44px;
  }

  .word-list-card.has-portrait-cover .btn {
    grid-column: 2;
    grid-row: 3;
    min-height: 44px;
    max-width: 100%;
    padding: 0 10px;
    font-size: 14px;
    white-space: nowrap;
  }

  .home-book-grid .book-card.has-modern-cover {
    grid-template-columns: minmax(98px, 108px) minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 1fr);
    min-height: 190px;
    gap: 10px;
    padding: 10px;
  }

  .home-book-grid .book-card.has-modern-cover .book-cover {
    grid-column: 1;
    grid-row: 1 / span 2;
    width: 100%;
    min-height: 0;
    height: auto;
    aspect-ratio: 2 / 3;
  }

  .home-book-grid .book-card.has-modern-cover .book-info {
    grid-column: 2;
    grid-row: 2;
    min-width: 0;
    padding-top: 0;
  }

  .home-book-grid .book-card.has-modern-cover > .card-favorite {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    align-self: center;
  }

  .home-book-grid .book-card.has-modern-cover .book-info h2 {
    font-size: clamp(17px, 1.7vw, 20px);
    line-height: 1.3;
    overflow-wrap: anywhere;
  }

  .home-book-grid .book-card.has-modern-cover .book-footer {
    align-items: flex-end;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 7px;
  }

  .home-book-grid .book-card.has-modern-cover .book-footer > span {
    min-width: 0;
    flex: 1 1 100px;
    line-height: 1.4;
  }

  .home-book-grid .book-card.has-modern-cover .book-footer .btn {
    min-height: 44px;
    flex: 0 0 auto;
    padding: 0 11px;
    font-size: 14px;
    white-space: nowrap;
  }

  .extension-catalog {
    max-width: none;
    margin: 10px auto 24px;
  }

  .extension-intro {
    min-height: 0;
    margin-bottom: 14px;
    padding-right: 0;
  }

  .extension-intro h1 {
    font-size: clamp(27px, 3vw, 34px);
  }

  .extension-catalog-guide {
    position: static;
    justify-content: flex-start;
    max-width: none;
    margin-top: 12px;
  }

  .extension-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .extension-card {
    grid-template-columns: 62px minmax(0, 1fr) 32px;
    grid-template-rows: auto minmax(0, 1fr);
    min-width: 0;
    min-height: 132px;
    gap: 9px;
    padding: 11px;
  }

  .extension-cover {
    grid-column: 1;
    grid-row: 1 / span 2;
    width: 62px;
    height: auto;
    min-height: 0;
    aspect-ratio: 2 / 3;
    padding: 7px;
  }

  .extension-card-info {
    grid-column: 2;
    grid-row: 2;
    min-width: 0;
    padding-top: 0;
  }

  .extension-card > .card-favorite {
    grid-column: 2 / 4;
    grid-row: 1;
    justify-self: end;
    align-self: center;
  }

  .extension-card:has(.extension-cover-portrait) > .card-favorite {
    position: static;
    top: auto;
    right: auto;
    z-index: auto;
    margin: 0;
  }

  .extension-card > .circle-action,
  .extension-card > .extension-card-actions {
    grid-column: 3;
    grid-row: 2;
    align-self: center;
  }

  .extension-card-info h2 {
    font-size: 16px;
    line-height: 1.3;
    overflow-wrap: anywhere;
  }

  .extension-card.has-extra-actions {
    grid-template-columns: 62px minmax(0, 1fr) 82px;
  }

  .extension-card-actions {
    display: grid;
    min-width: 0;
    gap: 6px;
    align-content: center;
  }

  .extension-card-actions .btn {
    width: 100%;
    min-height: 38px;
    padding: 5px 6px;
    font-size: 12px;
    white-space: nowrap;
  }

  .quiz-book-card.has-quiz-portrait {
    grid-template-columns: minmax(96px, 108px) minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 1fr) auto;
    min-height: 164px;
    gap: 8px;
    padding: 10px;
  }

  .quiz-book-cover {
    grid-column: 1;
    grid-row: 1 / span 3;
    min-height: 0;
    height: auto;
    aspect-ratio: 2 / 3;
  }

  .quiz-book-main {
    grid-column: 2;
    grid-row: 2;
    min-width: 0;
    padding: 0 3px 4px;
  }

  .quiz-book-card.has-quiz-portrait > .card-favorite {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    align-self: center;
  }

  .quiz-book-card.has-quiz-portrait > .quiz-book-start {
    grid-column: 2;
    grid-row: 3;
    justify-self: start;
  }

  .quiz-book-main strong {
    font-size: clamp(15px, 1.55vw, 17px);
    overflow-wrap: anywhere;
  }

  .quiz-book-start {
    min-height: 44px;
    white-space: nowrap;
  }
}

/* In portrait, keep content readable; the same cards become a single column. */
@media (min-width: 701px) and (max-width: 1366px) and (orientation: portrait),
       (pointer: coarse) and (min-width: 701px) and (max-width: 1600px) and (orientation: portrait) {
  .word-list,
  .home-book-grid,
  .quiz-book-grid,
  .quiz-book-grid:has(.has-quiz-portrait),
  .extension-grid,
  .textbook-reading-grid,
  .textbook-reading-volume-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Keep every card-level favorite in a predictable, clear bottom-right slot. */
.learning-layout .card-favorite,
.learning-layout .favorite-card-actions > .favorite-toggle,
.learning-layout .home-book-grid .book-card.has-modern-cover > .card-favorite,
.learning-layout .word-list-card.has-portrait-cover > .card-favorite,
.learning-layout .word-list-card:not(.has-portrait-cover) > .card-favorite,
.learning-layout .extension-card > .card-favorite,
.learning-layout .quiz-book-card.has-quiz-portrait > .card-favorite,
.learning-layout .textbook-reading-section-card > .card-favorite {
  position: absolute;
  inset: auto 8px 8px auto;
  z-index: 4;
  grid-column: auto;
  grid-row: auto;
  align-self: auto;
  justify-self: auto;
  flex: none;
  min-width: 0;
  min-height: 26px;
  margin: 0;
  padding: 4px 7px;
  font-size: 11px;
  line-height: 1;
  white-space: nowrap;
}

.learning-layout .home-book-grid .book-card.has-modern-cover,
.learning-layout .favorite-card,
.learning-layout .word-list-card,
.learning-layout .extension-card,
.learning-layout .quiz-book-card,
.learning-layout .textbook-reading-section-card {
  padding-bottom: 46px;
}

.learning-layout .textbook-reading-section-card {
  position: relative;
}

/* Tablet extension cards use separate rows for save, description and actions. */
@media (min-width: 701px) and (max-width: 1600px) and (pointer: coarse),
       (min-width: 701px) and (max-width: 1280px) {
  .learning-layout .extension-catalog,
  .learning-layout .extension-intro {
    min-width: 0;
    max-width: none;
  }

  .learning-layout .extension-intro {
    min-height: 0;
    margin-bottom: 16px;
    padding-right: 0;
  }

  .learning-layout .extension-intro h1 {
    max-width: 100%;
    overflow-wrap: anywhere;
  }

  .learning-layout .extension-catalog-guide {
    position: static;
    max-width: 100%;
    justify-content: flex-start;
    margin-top: 10px;
  }

  .learning-layout .extension-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: stretch;
    gap: 12px;
  }

  .learning-layout .extension-card.has-extra-actions {
    grid-template-columns: minmax(64px, 31%) minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 1fr) auto;
    min-width: 0;
    min-height: 190px;
    align-items: start;
    gap: 8px 10px;
    padding: 12px;
  }

  .learning-layout .extension-card.has-extra-actions > .extension-cover.extension-cover-portrait {
    grid-column: 1;
    grid-row: 1 / span 3;
    align-self: center;
    width: 100%;
    height: auto;
    min-height: 0;
    aspect-ratio: 2 / 3;
    padding: 0;
  }

  .learning-layout .extension-card.has-extra-actions > .card-favorite {
    position: static;
    inset: auto;
    z-index: 1;
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    align-self: start;
    min-width: 72px;
    min-height: 40px;
    padding: 7px 9px;
  }

  .learning-layout .extension-card.has-extra-actions > .extension-card-info {
    grid-column: 2;
    grid-row: 2;
    align-self: start;
    min-width: 0;
    padding: 0 2px;
  }

  .learning-layout .extension-card.has-extra-actions .project-kicker {
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    overflow-wrap: anywhere;
  }

  .learning-layout .extension-card.has-extra-actions .extension-card-info h2 {
    margin: 5px 0 4px;
    font-size: clamp(15px, 1.6vw, 18px);
    line-height: 1.3;
    overflow-wrap: anywhere;
  }

  .learning-layout .extension-card.has-extra-actions > .extension-card-actions {
    grid-column: 2;
    grid-row: 3;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-self: end;
    align-items: stretch;
    min-width: 0;
    gap: 5px;
  }

  .learning-layout .extension-card.has-extra-actions .extension-card-actions .btn {
    width: 100%;
    min-width: 0;
    min-height: 44px;
    padding: 5px 3px;
    font-size: clamp(10px, 1vw, 12px);
    line-height: 1.2;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .learning-layout .textbook-reading-volume-card {
    position: relative;
    cursor: pointer;
  }

  .learning-layout .textbook-reading-volume-card .textbook-reading-volume-actions {
    grid-column: 2;
    grid-row: 4;
    display: flex;
    width: 100%;
    min-width: 0;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
  }
}

/* Keep the reading-volume favorite as a compact, independent control beside its CTA. */
.learning-layout .textbook-reading-volume-card .textbook-reading-volume-actions > .textbook-reading-volume-favorite {
  position: relative;
  inset: auto;
  z-index: 2;
  flex: 0 0 44px;
  width: 44px;
  min-width: 44px;
  height: 44px;
  min-height: 44px;
  margin: 0;
  padding: 0;
  border-radius: 7px;
  font-size: 0;
}

.learning-layout .textbook-reading-volume-favorite::before {
  content: "☆";
  font-size: 19px;
  line-height: 1;
}

.learning-layout .textbook-reading-volume-favorite.is-favorited::before {
  content: "★";
}

.learning-layout .textbook-reading-volume-card .textbook-reading-volume-open {
  justify-self: auto;
  min-height: 44px;
  margin-top: 0;
  cursor: pointer;
}

.learning-layout .textbook-reading-volume-card .textbook-reading-volume-open:focus-visible,
.learning-layout .textbook-reading-volume-favorite:focus-visible {
  outline: 3px solid rgba(101, 91, 241, .42);
  outline-offset: 2px;
}