/* BahnDeutsch Meister book intro & purchase pages */

.bd-book-intro {
  --bd-book-accent: var(--bd-course-accent, #0b4f6c);
  --bd-book-accent-soft: color-mix(in srgb, var(--bd-book-accent) 12%, transparent);
  --bd-book-accent-mid: color-mix(in srgb, var(--bd-book-accent) 24%, transparent);
}

.bd-book-intro__shell::before {
  background: radial-gradient(circle, var(--bd-book-accent-mid) 0%, transparent 72%);
}

.bd-book-intro-badge {
  color: var(--bd-book-accent);
  background: var(--bd-book-accent-soft);
  border: 1px solid var(--bd-book-accent-mid);
  box-shadow: none;
}

.bd-book-intro-level {
  color: var(--bd-book-accent);
  background: var(--bd-book-accent-soft);
  border-color: var(--bd-book-accent-mid);
}

.bd-book-intro-cover-wrap {
  position: relative;
  width: min(220px, 72vw);
  margin: 0 auto 1.5rem;
}

.bd-book-intro-hero {
  display: grid;
  grid-template-columns: minmax(148px, 210px) minmax(0, 1fr);
  grid-template-areas:
    "cover badges"
    "cover copy";
  align-items: center;
  gap: 0.7rem 1.75rem;
  text-align: start;
}

.bd-book-intro-hero .bd-course-intro-hero__badge-row {
  grid-area: badges;
  margin-bottom: 0;
  justify-content: flex-start;
}

.bd-book-intro-hero .bd-book-intro-cover-wrap {
  grid-area: cover;
  width: 100%;
  margin: 0;
}

.bd-book-intro-hero__copy {
  grid-area: copy;
  min-width: 0;
}

/* Actual front covers from the four print-ready volumes. */
.bd-book-cover-image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 800 / 1131;
  object-fit: contain;
  border-radius: 2px 5px 5px 2px;
  box-shadow: 3px 3px 0 #e2e5e9, 7px 10px 18px rgba(15, 23, 42, 0.2);
}

.bd-book-cover-display {
  width: min(190px, 100%);
  margin-inline: auto;
}

.bd-book-intro-hero:has(.bd-book-intro-cover-wrap--series) {
  grid-template-columns: minmax(240px, 350px) minmax(0, 1fr);
}

.bd-book-cover-set {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  direction: ltr;
  padding: 12px 8px 22px 0;
  align-items: end;
}

.bd-book-cover-set__book:nth-child(even) {
  transform: translateY(-12px);
}

.bd-book-series-card__cover {
  display: block;
  align-self: center;
  width: min(100%, 185px);
  margin: 0.35rem 0 1rem;
}

.bd-book-intro-hero .bd-course-intro-hero__desc {
  max-width: none;
}

.bd-book-intro-cover__shadow {
  position: absolute;
  inset: 18px 8px -10px;
  border-radius: 18px;
  background: color-mix(in srgb, var(--bd-book-accent) 22%, transparent);
  filter: blur(16px);
  transform: rotate(-2deg);
}

.bd-book-intro-cover {
  position: relative;
  display: flex;
  min-height: 236px;
  border-radius: 18px 24px 24px 18px;
  overflow: hidden;
  transform: perspective(900px) rotateY(-8deg);
  box-shadow:
    0 24px 50px color-mix(in srgb, var(--bd-book-accent) 28%, transparent),
    inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.bd-book-intro-cover.is-compact {
  min-height: 220px;
}

.bd-book-intro-cover__spine {
  width: 18px;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--bd-book-accent) 78%, #0f172a) 0%,
    color-mix(in srgb, var(--bd-book-accent) 58%, #0f172a) 100%
  );
}

.bd-book-intro-cover__face {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 1.5rem 1rem;
  text-align: center;
  color: #fff;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.12), transparent 42%),
    linear-gradient(
      160deg,
      color-mix(in srgb, var(--bd-book-accent) 82%, #ffffff) 0%,
      var(--bd-book-accent) 55%,
      color-mix(in srgb, var(--bd-book-accent) 62%, #0f172a) 100%
    );
}

.bd-book-intro-cover__icon {
  width: 42px;
  height: 42px;
  margin-bottom: 0.35rem;
  opacity: 0.95;
}

.bd-book-intro-cover__brand {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.92;
}

.bd-book-intro-cover__meister {
  font-size: 1.45rem;
  font-weight: 900;
  line-height: 1.1;
}

.bd-book-intro-cover__levels {
  margin-top: 0.35rem;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.14);
}

/* Four-volume wayfinding */
.bd-book-series-nav {
  margin: 0 0 1.4rem;
  padding: clamp(1rem, 2.4vw, 1.35rem);
  border: 1px solid var(--bd-book-accent-mid);
  border-radius: 24px;
  background:
    radial-gradient(circle at 90% 0%, var(--bd-book-accent-soft), transparent 42%),
    rgba(255, 255, 255, 0.68);
  box-shadow: 0 18px 42px rgba(22, 40, 72, 0.08);
}

.bd-book-series-nav__head {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(240px, 1.2fr);
  align-items: end;
  gap: 1rem 1.5rem;
  margin-bottom: 1rem;
}

.bd-book-series-nav__eyebrow {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--bd-book-accent);
  font-size: 0.76rem;
  font-weight: 850;
}

.bd-book-series-nav__head h2 {
  margin: 0;
  color: #102944;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.35;
}

.bd-book-series-nav__head p {
  margin: 0;
  color: #526174;
  font-size: 0.9rem;
  line-height: 1.75;
}

.bd-book-series-nav__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}

.bd-book-series-card {
  --bd-volume-accent: #153a70;
  position: relative;
  display: flex;
  min-height: 154px;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.35rem;
  padding: 0.9rem;
  overflow: hidden;
  color: #526174;
  text-decoration: none !important;
  border: 1px solid color-mix(in srgb, var(--bd-volume-accent) 22%, transparent);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: inset 0 4px 0 var(--bd-volume-accent);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.bd-book-series-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--bd-volume-accent) 46%, transparent);
  box-shadow:
    inset 0 4px 0 var(--bd-volume-accent),
    0 12px 25px color-mix(in srgb, var(--bd-volume-accent) 15%, transparent);
}

.bd-book-series-card:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--bd-volume-accent) 34%, transparent);
  outline-offset: 2px;
}

.bd-book-series-card.is-current {
  background: color-mix(in srgb, var(--bd-volume-accent) 8%, #ffffff);
  border-color: color-mix(in srgb, var(--bd-volume-accent) 46%, transparent);
}

.bd-book-series-card__number {
  color: var(--bd-volume-accent);
  font-size: 0.78rem;
  font-weight: 850;
}

.bd-book-series-card strong {
  color: #102944;
  font-size: 1.16rem;
  line-height: 1.2;
}

.bd-book-series-card > span:not(.bd-book-series-card__number, .bd-book-series-card__action) {
  font-size: 0.76rem;
  line-height: 1.55;
}

.bd-book-series-card__action {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
  color: var(--bd-volume-accent);
  font-size: 0.78rem;
  font-weight: 800;
}

.bd-book-series-card__action svg {
  width: 16px;
  height: 16px;
}

.bd-book-intro-package {
  padding: 1.1rem 1.15rem;
  border-radius: 20px;
  border: 1px solid var(--bd-book-accent-mid);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.42));
}

.bd-book-intro-package h3 {
  margin: 0 0 0.85rem;
  font-size: 1rem;
  color: #083045;
}

.bd-book-intro-cta-secondary {
  margin-top: 0.55rem;
}

/* Sticky purchase island: one compact row (price | buy | activate).
   A column stack plus content-box padding made the primary burst out of
   the pill and cover the license link. */
.bd-book-intro-sticky .bd-course-intro-sticky__inner {
  align-items: center;
  gap: 0.75rem 1rem;
}

.bd-book-intro-sticky .bd-course-intro-sticky__price {
  flex: 0 1 auto;
  min-width: 0;
}

.bd-book-intro-sticky .bd-course-intro-sticky__cta {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.4rem 0.65rem;
  flex: 1 1 auto;
  min-width: 0;
}

.bd-book-intro-sticky .bd-book-intro-cta-secondary {
  margin-top: 0;
}

.bd-book-intro--purchase .bd-course-intro__shell {
  padding-bottom: 2rem;
}

.bd-book-purchase-hero {
  margin-bottom: 1.25rem;
}

.bd-book-purchase-hero__grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.bd-book-purchase-hero__copy {
  flex: 1 1 auto;
  min-width: 0;
}

.bd-book-purchase-hero__cover {
  flex: 0 0 auto;
  width: min(148px, 34vw);
  margin: 0;
}

.bd-book-purchase-hero__cover .bd-book-intro-cover.is-compact {
  min-height: 188px;
  transform: none;
}

.bd-book-purchase-hero__cover .bd-book-intro-cover__shadow {
  inset: 12px 6px -8px;
}

.bd-book-purchase-hero__eyebrow {
  display: inline-flex;
  margin-bottom: 0.55rem;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
  color: #0a3d54;
  background: var(--bd-book-accent-soft);
}

.bd-book-purchase-hero__copy h1 {
  margin: 0 0 0.45rem;
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  line-height: 1.25;
  color: #102944;
}

.bd-book-purchase-hero__copy p {
  margin: 0;
  color: #475569;
  line-height: 1.7;
}

.bd-book-purchase-hero__link {
  display: inline-flex;
  margin-top: 0.85rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: #0b4f6c;
  text-decoration: none;
}

.bd-book-purchase-hero__link:hover {
  text-decoration: underline;
}

.bd-book-purchase-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1rem;
  align-items: start;
}

.bd-book-purchase-card,
.bd-book-purchase-checkout__box {
  padding: 1.15rem 1.2rem;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.82);
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 14px 34px rgba(22, 40, 72, 0.08);
}

.bd-book-purchase-card h2,
.bd-book-purchase-checkout h2 {
  margin: 0 0 1rem;
  font-size: 1.05rem;
  color: #102944;
}

.bd-book-purchase-summary {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}

.bd-book-purchase-summary li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.72rem 0;
  border-bottom: 1px dashed rgba(109, 40, 217, 0.18);
  font-size: 0.92rem;
}

.bd-book-purchase-summary li span {
  color: #64748b;
}

.bd-book-purchase-summary li strong {
  color: #102944;
  text-align: end;
}

.bd-book-purchase-summary li.is-total {
  border-bottom: 0;
  padding-top: 1rem;
  font-size: 1rem;
}

.bd-book-purchase-summary li.is-total strong {
  font-size: 1.2rem;
  color: #0b4f6c;
}

.bd-book-purchase-includes h3 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  color: #083045;
}

.bd-book-purchase-note {
  margin: 1rem 0 0;
  padding: 0.85rem 0.95rem;
  border-radius: 14px;
  background: rgba(109, 40, 217, 0.08);
  color: #0b4f6c;
  line-height: 1.7;
  font-size: 0.9rem;
}

.bd-book-purchase-checkout__price {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(109, 40, 217, 0.14);
}

.bd-book-purchase-checkout__price span {
  color: #64748b;
  font-size: 0.92rem;
}

.bd-book-purchase-checkout__price strong {
  font-size: 1.35rem;
  color: #0b4f6c;
}

.bd-book-purchase-form {
  margin: 0;
}

.bd-book-purchase-btn,
.bd-book-intro .bd-intro-btn.is-primary.bd-book-purchase-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  width: 100%;
  min-height: 52px;
  padding: 0.9rem 1.15rem !important;
  border: 0 !important;
  border-radius: 14px !important;
  font-family: inherit;
  font-size: 1rem !important;
  font-weight: 800 !important;
  line-height: 1.25;
  text-decoration: none !important;
  cursor: pointer;
  color: #ffffff !important;
  background: linear-gradient(
    135deg,
    var(--bd-course-accent, #0b4f6c),
    color-mix(in srgb, var(--bd-course-accent, #0b4f6c) 72%, #0f172a)
  ) !important;
  box-shadow: 0 14px 28px color-mix(in srgb, var(--bd-course-accent, #0b4f6c) 34%, transparent) !important;
  transition: transform 0.22s ease, filter 0.22s ease, box-shadow 0.22s ease;
}

.bd-book-intro-sticky .bd-intro-btn.is-primary,
.bd-book-intro-sticky .bd-intro-btn.is-primary.bd-course-intro-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  flex: 1 1 11rem;
  width: auto;
  max-width: 100%;
  min-width: 0;
  min-height: 46px;
  padding: 0.55rem 1rem !important;
  border: 0 !important;
  border-radius: 14px !important;
  font-family: inherit;
  font-size: 0.95rem !important;
  font-weight: 800 !important;
  line-height: 1.2;
  text-decoration: none !important;
  cursor: pointer;
  color: #ffffff !important;
  background: linear-gradient(
    135deg,
    var(--bd-course-accent, #0b4f6c),
    color-mix(in srgb, var(--bd-course-accent, #0b4f6c) 72%, #0f172a)
  ) !important;
  box-shadow: 0 8px 16px color-mix(in srgb, var(--bd-course-accent, #0b4f6c) 26%, transparent) !important;
  transition: transform 0.22s ease, filter 0.22s ease, box-shadow 0.22s ease;
}

.bd-book-purchase-btn span,
.bd-book-intro-sticky .bd-intro-btn.is-primary span {
  color: #ffffff !important;
}

.bd-book-intro-sticky .bd-intro-btn.is-primary span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bd-book-purchase-btn .bd-intro-icon,
.bd-book-intro-sticky .bd-intro-btn.is-primary .bd-intro-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  color: #ffffff !important;
}

.bd-book-purchase-btn:hover,
.bd-book-intro-sticky .bd-intro-btn.is-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.bd-book-purchase-btn:focus-visible,
.bd-book-intro-sticky .bd-intro-btn.is-primary:focus-visible {
  outline: none;
  box-shadow:
    0 8px 16px color-mix(in srgb, var(--bd-course-accent, #0b4f6c) 26%, transparent),
    0 0 0 4px color-mix(in srgb, var(--bd-course-accent, #0b4f6c) 28%, transparent) !important;
}

.bd-book-intro-sticky .bd-intro-btn.is-secondary {
  flex: 0 0 auto;
  width: auto;
  max-width: 100%;
  min-height: 36px !important;
  padding: 0.35rem 0.55rem !important;
  font-size: 0.8rem !important;
  font-weight: 700 !important;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--bd-course-accent, #0b4f6c) !important;
  background: transparent !important;
  border: 0 !important;
  box-shadow: none !important;
}

.bd-book-intro-sticky .bd-intro-btn.is-secondary:hover {
  text-decoration: underline;
}

.bd-book-intro-sticky .bd-intro-btn.is-secondary span {
  color: var(--bd-course-accent, #0b4f6c) !important;
}

.bd-book-intro-sticky .bd-intro-btn.is-secondary .bd-intro-icon {
  width: 15px;
  height: 15px;
  flex: 0 0 15px;
}

.bd-book-purchase-trust-badges {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.bd-book-purchase-trust-badges li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.84rem;
  color: #475569;
}

.bd-book-purchase-trust-badges svg {
  width: 18px;
  height: 18px;
  color: #0b4f6c;
  flex-shrink: 0;
}

.bd-book-intro-error,
.bd-book-intro .bd-payment-message {
  margin: 1rem auto;
  max-width: 720px;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  background: #fff5f5;
  color: #b91c1c;
  text-align: center;
}

/* ============================================================
   "At a glance" specs strip
   ============================================================ */
.bd-book-intro-specs {
  margin: 0 0 1.6rem;
}

.bd-book-purchase-specs {
  margin: 0 0 1.35rem;
}

.bd-book-intro-specs__strip {
  list-style: none;
  margin: 0;
  padding: 0.4rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.35rem;
  border-radius: 22px;
  border: 1px solid var(--bd-book-accent-mid);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.52));
  box-shadow: 0 16px 38px rgba(22, 40, 72, 0.09);
  backdrop-filter: blur(6px);
}

.bd-book-intro-specs__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 1.05rem 0.65rem;
  text-align: center;
  border-radius: 16px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.bd-book-intro-specs__item:hover {
  background: rgba(109, 40, 217, 0.06);
  transform: translateY(-2px);
}

.bd-book-intro-specs__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  color: var(--bd-book-accent);
  background: var(--bd-book-accent-soft);
}

.bd-book-intro-specs__icon svg {
  width: 23px;
  height: 23px;
}

.bd-book-intro-specs__value {
  font-size: 1.2rem;
  font-weight: 900;
  line-height: 1.1;
  color: #102944;
}

.bd-book-intro-specs__label {
  font-size: 0.78rem;
  line-height: 1.45;
  color: #64748b;
}

/* ============================================================
   Curriculum roadmap (A0 → B2)
   ============================================================ */
.bd-book-intro-curriculum {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
  counter-reset: none;
}

.bd-book-intro-curriculum__item {
  display: flex;
  align-items: stretch;
  gap: 0.95rem;
  padding: 1rem 1.15rem;
  border-radius: 18px;
  border: 1px solid rgba(109, 40, 217, 0.16);
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 10px 26px rgba(22, 40, 72, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.bd-book-intro-curriculum__item:hover {
  transform: translateY(-2px);
  border-color: var(--bd-book-accent-mid);
  box-shadow: 0 16px 34px rgba(76, 29, 149, 0.14);
}

.bd-book-intro-curriculum__level {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  padding: 0 0.55rem;
  border-radius: 14px;
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: #fff;
  background: linear-gradient(
    150deg,
    color-mix(in srgb, var(--bd-book-accent) 84%, #ffffff) 0%,
    var(--bd-book-accent) 58%,
    color-mix(in srgb, var(--bd-book-accent) 62%, #0f172a) 100%
  );
  box-shadow: 0 8px 18px color-mix(in srgb, var(--bd-book-accent) 30%, transparent);
}

.bd-book-intro-curriculum__body {
  display: flex;
  flex-direction: column;
  gap: 0.22rem;
  min-width: 0;
}

.bd-book-intro-curriculum__count {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--bd-book-accent);
}

.bd-book-intro-curriculum__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: #475569;
}

/* ============================================================
   Sticky price polish
   ============================================================ */
.bd-book-intro-sticky .bd-course-intro-sticky__price strong {
  font-size: 1.15rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  color: var(--bd-book-accent);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 860px) {
  .bd-book-purchase-layout {
    grid-template-columns: 1fr;
  }

  .bd-book-purchase-hero__grid {
    flex-direction: column;
    text-align: center;
  }

  .bd-book-purchase-hero__cover {
    width: min(160px, 52vw);
    margin-inline: auto;
  }

  .bd-book-intro-cover-wrap {
    margin-inline: auto;
  }
}

@media (max-width: 760px) {
  .bd-book-intro-specs__strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .bd-book-series-nav__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bd-book-series-nav__head {
    grid-template-columns: 1fr;
    align-items: start;
  }
}

@media (max-width: 720px) {
  .bd-book-intro-hero {
    grid-template-columns: 1fr;
    grid-template-areas:
      "badges"
      "cover"
      "copy";
    justify-items: center;
    text-align: center;
    gap: 0.85rem;
  }

  .bd-book-intro-hero .bd-course-intro-hero__badge-row {
    justify-content: center;
  }

  .bd-book-intro-hero .bd-book-intro-cover-wrap {
    width: min(176px, 56vw);
    margin-inline: auto;
  }

  .bd-book-intro-hero:has(.bd-book-intro-cover-wrap--series) {
    grid-template-columns: 1fr;
  }

  .bd-book-intro-hero .bd-book-intro-cover-wrap--series {
    width: min(360px, 100%);
  }
}

@media (max-width: 640px) {
  .bd-book-intro-cover {
    min-height: 200px;
    transform: none;
  }

  .bd-book-intro-curriculum__item {
    gap: 0.75rem;
    padding: 0.9rem 1rem;
  }

  .bd-book-intro-curriculum__level {
    min-width: 48px;
    font-size: 0.98rem;
  }

  .bd-book-intro-sticky .bd-course-intro-sticky__inner {
    gap: 0.55rem;
  }

  .bd-book-intro-sticky .bd-course-intro-sticky__cta {
    width: 100%;
    justify-content: stretch;
  }

  .bd-book-intro-sticky .bd-intro-btn.is-primary,
  .bd-book-intro-sticky .bd-intro-btn.is-primary.bd-course-intro-cta {
    flex: 1 1 auto;
  }
}

@media (max-width: 420px) {
  .bd-book-series-nav__grid {
    grid-template-columns: 1fr;
  }

  .bd-book-series-card {
    min-height: 132px;
  }

  .bd-book-intro-sticky .bd-course-intro-sticky__cta {
    flex-wrap: wrap;
  }

  .bd-book-intro-sticky .bd-intro-btn.is-primary,
  .bd-book-intro-sticky .bd-intro-btn.is-primary.bd-course-intro-cta {
    flex: 1 1 100%;
  }

  .bd-book-intro-sticky .bd-intro-btn.is-secondary {
    flex: 1 1 100%;
    justify-content: center;
    white-space: normal;
  }

  .bd-book-intro-sticky .bd-course-intro-sticky__price strong {
    white-space: normal;
  }
}

@media (max-height: 760px) {
  .bd-book-intro-cover {
    min-height: 188px;
  }

  .bd-book-intro-hero .bd-course-intro-hero__desc {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
}