/* Compact course navigation and a master-detail learning map. */

.s5-reader-shell {
  margin: .8rem 0 1.15rem;
}

.s5-reader-topbar {
  position: sticky;
  top: 112px;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(170px, .9fr) minmax(260px, 1.4fr) minmax(170px, .9fr);
  min-height: 58px;
  border: 1px solid var(--s5-line-strong);
  background: var(--md-default-bg-color);
  box-shadow: 0 8px 22px color-mix(in srgb, var(--s5-text) 6%, transparent);
}

.s5-reader-arrow,
.s5-reader-course {
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--s5-text) !important;
  text-decoration: none !important;
}

.s5-reader-arrow {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .6rem;
  align-items: center;
  padding: .62rem .8rem;
}

.s5-reader-arrow--next {
  grid-template-columns: minmax(0, 1fr) auto;
  border-left: 1px solid var(--s5-line);
  text-align: right;
}

.s5-reader-arrow--prev {
  border-right: 1px solid var(--s5-line);
}

.s5-reader-arrow > b {
  font-size: 1rem;
}

.s5-reader-arrow__copy {
  display: grid;
  min-width: 0;
  gap: .08rem;
}

.s5-reader-arrow span,
.s5-reader-course > span,
.s5-reader-end span,
.s5-reader-map__header > div > span,
.s5-reader-series-panel header span {
  color: var(--s5-muted);
  font-size: .5rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.s5-reader-arrow strong {
  overflow: hidden;
  font-size: .63rem;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.s5-reader-arrow small {
  overflow: hidden;
  color: var(--s5-muted);
  font-size: .5rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.s5-reader-arrow:hover,
.s5-reader-arrow:focus-visible,
.s5-reader-course:hover,
.s5-reader-course:focus-visible {
  background: color-mix(in srgb, var(--s5-text) 4%, transparent);
}

.s5-reader-arrow.is-disabled {
  opacity: .22;
}

.s5-reader-course {
  position: relative;
  display: grid;
  align-content: center;
  gap: .12rem;
  padding: .55rem .9rem .7rem;
  cursor: pointer;
  text-align: center;
}

.s5-reader-course strong {
  overflow: hidden;
  font-size: .72rem;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.s5-reader-course i {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--s5-line);
}

.s5-reader-course i::after {
  display: block;
  width: var(--s5-reader-progress);
  height: 100%;
  background: var(--s5-brand-blue);
  content: '';
}

.s5-reader-rail {
  display: grid;
  grid-auto-columns: minmax(125px, 1fr);
  grid-auto-flow: column;
  overflow-x: auto;
  margin-top: .45rem;
  border-top: 1px solid var(--s5-line);
  border-bottom: 1px solid var(--s5-line);
  scrollbar-width: thin;
}

.s5-reader-rail a {
  display: grid;
  min-width: 0;
  gap: .15rem;
  min-height: 48px;
  padding: .48rem .58rem;
  border-right: 1px solid var(--s5-line);
  color: var(--s5-text) !important;
  text-decoration: none !important;
}

.s5-reader-rail a span {
  color: var(--s5-muted);
  font-size: .48rem;
  font-weight: 800;
}

.s5-reader-rail a strong {
  overflow: hidden;
  font-size: .56rem;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.s5-reader-rail a:hover,
.s5-reader-rail a:focus-visible {
  background: color-mix(in srgb, var(--s5-text) 4%, transparent);
}

.s5-reader-rail a[aria-current='page'] {
  background: color-mix(in srgb, var(--s5-brand-blue) 8%, transparent);
  box-shadow: inset 0 -3px 0 var(--s5-brand-blue);
}

.s5-reader-rail a[aria-current='page'] span,
.s5-reader-rail a[aria-current='page'] strong {
  color: var(--s5-brand-blue);
}

.s5-reader-map {
  width: min(1120px, calc(100vw - 2rem));
  max-width: none;
  height: min(760px, calc(100dvh - 2rem));
  max-height: none;
  margin: auto;
  padding: 0;
  border: 1px solid var(--s5-line-strong);
  background: var(--md-default-bg-color);
  color: var(--s5-text);
}

.s5-reader-map::backdrop {
  background: color-mix(in srgb, #000 66%, transparent);
  backdrop-filter: blur(3px);
}

.s5-reader-map__surface {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100%;
  overflow: hidden;
}

.s5-reader-map__header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: end;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--s5-line-strong);
}

.s5-reader-map__header h2 {
  margin: .25rem 0 .25rem !important;
  padding: 0 !important;
  border: 0 !important;
  font-size: clamp(1.55rem, 2.8vw, 2.45rem) !important;
  line-height: .98 !important;
  letter-spacing: -.045em !important;
}

.s5-reader-map__header p {
  max-width: 62ch;
  margin: 0;
  color: var(--s5-muted);
  font-size: .6rem;
  line-height: 1.4;
}

.s5-reader-map__tools {
  display: flex;
  gap: .5rem;
  align-items: center;
}

.s5-reader-search {
  width: min(320px, 30vw);
  min-height: 38px;
  padding: .45rem .6rem;
  border: 1px solid var(--s5-line-strong);
  border-radius: 0;
  background: var(--md-default-bg-color);
  color: var(--s5-text);
  font: inherit;
  font-size: .6rem;
}

.s5-reader-search:focus {
  border-color: var(--s5-brand-blue);
  outline: 2px solid color-mix(in srgb, var(--s5-brand-blue) 18%, transparent);
  outline-offset: 1px;
}

.s5-reader-map__tools button {
  min-height: 38px;
  padding: .45rem .65rem;
  border: 1px solid var(--s5-line-strong);
  background: transparent;
  color: var(--s5-text);
  cursor: pointer;
  font-size: .58rem;
  font-weight: 750;
}

.s5-reader-map__body {
  display: grid;
  grid-template-columns: minmax(220px, 290px) minmax(0, 1fr);
  min-height: 0;
}

.s5-reader-series-list {
  overflow-y: auto;
  border-right: 1px solid var(--s5-line-strong);
}

.s5-reader-series-tab {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: .55rem;
  width: 100%;
  min-height: 66px;
  padding: .7rem .8rem;
  border: 0;
  border-bottom: 1px solid var(--s5-line);
  background: transparent;
  color: var(--s5-text);
  cursor: pointer;
  text-align: left;
}

.s5-reader-series-tab > span:first-child {
  color: var(--s5-brand-orange);
  font-size: .52rem;
  font-weight: 800;
}

.s5-reader-series-tab > span:last-child {
  display: grid;
  min-width: 0;
  gap: .15rem;
}

.s5-reader-series-tab strong {
  font-size: .72rem;
  line-height: 1.18;
}

.s5-reader-series-tab small {
  color: var(--s5-muted);
  font-size: .5rem;
}

.s5-reader-series-tab:hover,
.s5-reader-series-tab:focus-visible {
  background: color-mix(in srgb, var(--s5-text) 4%, transparent);
}

.s5-reader-series-tab[aria-selected='true'] {
  background: color-mix(in srgb, var(--s5-brand-blue) 8%, transparent);
  box-shadow: inset 3px 0 0 var(--s5-brand-blue);
}

.s5-reader-series-tab[aria-selected='true'] strong,
.s5-reader-series-tab[aria-selected='true'] > span:first-child {
  color: var(--s5-brand-blue);
}

.s5-reader-series-tab[hidden],
.s5-reader-series-panel[hidden],
.s5-reader-series-panel a[hidden],
.s5-reader-empty[hidden] {
  display: none !important;
}

.s5-reader-series-panels {
  min-width: 0;
  overflow-y: auto;
  padding: 1rem 1.1rem 1.2rem;
}

.s5-reader-series-panel header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: end;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--s5-line-strong);
}

.s5-reader-series-panel header > div {
  display: grid;
  gap: .2rem;
}

.s5-reader-series-panel h3 {
  margin: 0 !important;
  font-size: 1.15rem;
  line-height: 1.1;
  letter-spacing: -.035em;
}

.s5-reader-series-panel header > small {
  color: var(--s5-muted);
  font-size: .54rem;
}

.s5-reader-series-panel nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.s5-reader-series-panel nav a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  gap: .5rem;
  align-items: center;
  min-height: 54px;
  padding: .55rem .65rem;
  border-right: 1px solid var(--s5-line);
  border-bottom: 1px solid var(--s5-line);
  color: var(--s5-text) !important;
  text-decoration: none !important;
}

.s5-reader-series-panel nav a:nth-child(even) {
  border-right: 0;
}

.s5-reader-series-panel nav a span {
  color: var(--s5-muted);
  font-size: .5rem;
  font-weight: 800;
}

.s5-reader-series-panel nav a strong {
  overflow: hidden;
  font-size: .64rem;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.s5-reader-series-panel nav a b {
  color: var(--s5-muted);
  font-size: .48rem;
  font-weight: 700;
}

.s5-reader-series-panel nav a:hover,
.s5-reader-series-panel nav a:focus-visible {
  background: color-mix(in srgb, var(--s5-text) 4%, transparent);
}

.s5-reader-series-panel nav a[aria-current='page'] {
  background: color-mix(in srgb, var(--s5-brand-blue) 9%, transparent);
}

.s5-reader-series-panel nav a[aria-current='page'] span,
.s5-reader-series-panel nav a[aria-current='page'] strong,
.s5-reader-series-panel nav a[aria-current='page'] b {
  color: var(--s5-brand-blue);
}

.s5-reader-empty {
  margin: 0;
  padding: 1rem;
  color: var(--s5-muted);
  font-size: .65rem;
}

.s5-reader-end {
  display: grid;
  gap: .75rem;
  margin: 2rem 0 .5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--s5-line-strong);
}

.s5-reader-end__label,
.s5-reader-end__footer {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.s5-reader-end__label button {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--s5-text);
  cursor: pointer;
  font-size: .58rem;
  font-weight: 750;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.s5-reader-end__next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .15rem 1rem;
  padding: 1rem;
  border: 1px solid var(--s5-line-strong);
  color: var(--s5-text) !important;
  text-decoration: none !important;
}

.s5-reader-end__next span,
.s5-reader-end__next strong,
.s5-reader-end__next small {
  grid-column: 1;
}

.s5-reader-end__next strong {
  font-size: clamp(1rem, 2vw, 1.35rem);
  line-height: 1.08;
  letter-spacing: -.035em;
}

.s5-reader-end__next small {
  color: var(--s5-muted);
  font-size: .56rem;
}

.s5-reader-end__next b {
  grid-column: 2;
  grid-row: 1 / 4;
  align-self: center;
  font-size: 1.35rem;
}

.s5-reader-end__next:hover,
.s5-reader-end__next:focus-visible {
  border-color: var(--s5-brand-blue);
  background: color-mix(in srgb, var(--s5-brand-blue) 5%, transparent);
}

.s5-reader-end__footer a {
  color: var(--s5-text) !important;
  font-size: .58rem;
  font-weight: 700;
  text-decoration: none !important;
}

@media (max-width: 960px) {
  .s5-reader-topbar {
    top: 64px;
    grid-template-columns: 52px minmax(0, 1fr) 52px;
  }

  .s5-reader-arrow {
    display: flex;
    justify-content: center;
    padding: .45rem;
  }

  .s5-reader-arrow__copy {
    display: none;
  }

  .s5-reader-course {
    padding-inline: .55rem;
  }

  .s5-reader-course > span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .s5-reader-course strong {
    font-size: .62rem;
  }

  .s5-reader-map__header {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .s5-reader-map__tools {
    justify-content: space-between;
  }

  .s5-reader-search {
    width: min(100%, 430px);
    flex: 1;
  }
}

@media (max-width: 800px) {
  .s5-reader-shell {
    margin: .65rem 0 .9rem;
  }

  .s5-reader-topbar {
    min-height: 52px;
    box-shadow: 0 5px 14px color-mix(in srgb, var(--s5-text) 7%, transparent);
  }

  .s5-reader-rail {
    grid-auto-columns: minmax(108px, 42vw);
    margin-top: .35rem;
  }

  .s5-reader-rail a {
    min-height: 44px;
    padding: .42rem .5rem;
  }

  .s5-reader-map {
    width: 100vw;
    height: 100dvh;
    border: 0;
  }

  .s5-reader-map__header {
    gap: .75rem;
    padding: .85rem 1rem;
  }

  .s5-reader-map__header h2 {
    font-size: 1.7rem !important;
  }

  .s5-reader-map__header p {
    font-size: .57rem;
  }

  .s5-reader-map__tools {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .s5-reader-search {
    width: 100%;
  }

  .s5-reader-map__body {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr);
  }

  .s5-reader-series-list {
    display: grid;
    grid-auto-columns: minmax(190px, 72vw);
    grid-auto-flow: column;
    overflow-x: auto;
    overflow-y: hidden;
    border-right: 0;
    border-bottom: 1px solid var(--s5-line-strong);
  }

  .s5-reader-series-tab {
    min-height: 58px;
    border-right: 1px solid var(--s5-line);
    border-bottom: 0;
  }

  .s5-reader-series-tab[aria-selected='true'] {
    box-shadow: inset 0 -3px 0 var(--s5-brand-blue);
  }

  .s5-reader-series-panels {
    padding: .8rem 1rem 1rem;
  }

  .s5-reader-series-panel nav {
    grid-template-columns: 1fr;
  }

  .s5-reader-series-panel nav a,
  .s5-reader-series-panel nav a:nth-child(even) {
    border-right: 0;
  }

  .s5-reader-end {
    margin-top: 1.5rem;
  }

  .s5-reader-end__label,
  .s5-reader-end__footer {
    align-items: flex-start;
  }

  .s5-reader-end__next {
    padding: .85rem;
  }
}