.isbn-barcode-page {
  --isbn-ink: #303033;
  --isbn-muted: #686868;
  --isbn-line: #eaded6;
  --isbn-paper: #fffbed;
  --isbn-soft: #fff4ef;
  --isbn-accent: #ff7568;
  color: var(--isbn-ink);
  overflow: clip;
}

.isbn-barcode-page__hero {
  padding: 58px 0 72px;
  background:
    radial-gradient(circle at 82% 18%, rgba(255, 117, 104, .14), transparent 25%),
    linear-gradient(135deg, #fffbed 0%, #fff9ed 62%, #fff4ea 100%);
  border-bottom: 1px solid rgba(48, 48, 51, .07);
}

.isbn-barcode-page__hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.36fr) minmax(290px, .64fr);
  align-items: end;
  gap: clamp(38px, 6vw, 78px);
}

.isbn-barcode-page__start {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 30px;
  color: var(--isbn-ink);
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
}

.isbn-barcode-page__start span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #fff;
  background: var(--isbn-accent);
  border-radius: 50%;
  transition: transform 160ms cubic-bezier(.23, 1, .32, 1);
}

.isbn-barcode-page__start:focus-visible,
.isbn-barcode-page__answer a:focus-visible,
.isbn-barcode-page__source-links a:focus-visible,
.isbn-barcode-tool__example:focus-visible,
.isbn-barcode-tool input:focus-visible,
.isbn-barcode-page summary:focus-visible {
  outline: 3px solid rgba(255, 117, 104, .35);
  outline-offset: 4px;
}

.isbn-barcode-page__start:active span,
.isbn-barcode-tool__submit:active,
.isbn-barcode-preview__actions .btn:active,
.isbn-barcode-page__cta .btn:active {
  transform: scale(.97);
}

.isbn-barcode-page__answer {
  padding: 30px;
  background: rgba(255, 255, 255, .82);
  border: 1px solid rgba(255, 117, 104, .3);
  border-radius: 28px 28px 28px 6px;
  box-shadow: 0 18px 48px rgba(60, 45, 39, .06);
}

.isbn-barcode-page__answer > span,
.isbn-barcode-preview__heading span {
  display: block;
  margin-bottom: 12px;
  color: var(--isbn-accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.isbn-barcode-page__answer strong {
  display: block;
  font-size: 22px;
  line-height: 1.3;
}

.isbn-barcode-page__answer p,
.isbn-barcode-tool__heading > p:last-child,
.isbn-barcode-page__meaning p,
.isbn-barcode-page__section-heading > p:last-child,
.isbn-barcode-page__standard p,
.isbn-barcode-page__faq-heading > p:last-child,
.isbn-barcode-page__cta p {
  color: var(--isbn-muted);
  font-size: 17px;
  line-height: 1.45;
}

.isbn-barcode-page__answer p {
  margin: 12px 0 20px;
}

.isbn-barcode-page__answer a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--isbn-ink);
  font-weight: 700;
  text-decoration: none;
}

.isbn-barcode-page__answer a i {
  color: var(--isbn-accent);
  font-size: 20px;
  font-style: normal;
}

.isbn-barcode-page h2 {
  margin: 0;
  font-size: clamp(34px, 3.4vw, 50px);
  line-height: 1.12;
  letter-spacing: -.025em;
}

.isbn-barcode-page__tool-section {
  padding: 86px 0;
}

.isbn-barcode-page__tool-grid {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
  gap: clamp(34px, 6vw, 78px);
  align-items: stretch;
}

.isbn-barcode-tool,
.isbn-barcode-preview {
  min-width: 0;
  padding: clamp(28px, 4vw, 44px);
  border: 1px solid var(--isbn-line);
  border-radius: 30px 30px 30px 7px;
}

.isbn-barcode-tool {
  background: #fff;
  box-shadow: 0 18px 50px rgba(55, 45, 39, .06);
}

.isbn-barcode-tool__heading {
  margin-bottom: 34px;
}

.isbn-barcode-tool__heading h2,
.isbn-barcode-preview__heading h2 {
  font-size: clamp(30px, 3vw, 42px);
}

.isbn-barcode-tool__heading > p:last-child {
  margin: 15px 0 0;
}

.isbn-barcode-tool__label {
  display: block;
  margin-bottom: 10px;
  font-size: 16px;
  font-weight: 700;
}

.isbn-barcode-tool__input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: stretch;
  gap: 10px;
}

.isbn-barcode-tool input {
  min-width: 0;
  height: 58px;
  padding: 0 18px;
  color: var(--isbn-ink);
  font: inherit;
  font-size: 18px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .035em;
  background: #fff;
  border: 1px solid #cfc6c1;
  border-radius: 14px;
  box-shadow: none;
}

.isbn-barcode-tool input:focus {
  position: relative;
  z-index: 1;
  border-color: var(--isbn-accent);
}

.isbn-barcode-tool input[aria-invalid="true"] {
  border-color: #bf3e37;
  box-shadow: 0 0 0 3px rgba(191, 62, 55, .12);
}

.isbn-barcode-tool__example {
  justify-self: start;
  min-height: 42px;
  padding: 0 14px;
  color: var(--isbn-ink);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  background: var(--isbn-paper);
  border: 1px solid #cfc6c1;
  border-radius: 12px;
  cursor: pointer;
  transition: color 160ms ease, background-color 160ms ease;
}

.isbn-barcode-tool__hint,
.isbn-barcode-tool__error {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.5;
}

.isbn-barcode-tool__hint {
  color: var(--isbn-muted);
}

.isbn-barcode-tool__error {
  color: #a8322c;
  font-weight: 600;
}

.isbn-barcode-tool__submit {
  width: 100%;
  margin-top: 26px;
  transition: transform 160ms cubic-bezier(.23, 1, .32, 1);
}

.isbn-barcode-tool__privacy {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--isbn-line);
}

.isbn-barcode-tool__privacy > span {
  display: grid;
  flex: 0 0 24px;
  width: 24px;
  height: 24px;
  place-items: center;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  background: var(--isbn-accent);
  border-radius: 50%;
}

.isbn-barcode-tool__privacy p {
  margin: 0;
  color: var(--isbn-muted);
  font-size: 14px;
  line-height: 1.5;
}

.isbn-barcode-preview {
  display: flex;
  flex-direction: column;
  background: var(--isbn-soft);
  border-color: rgba(255, 117, 104, .3);
}

.isbn-barcode-preview:focus {
  outline: none;
}

.isbn-barcode-preview__heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.isbn-barcode-preview__heading > strong {
  flex: 0 0 auto;
  padding: 8px 12px;
  color: var(--isbn-muted);
  font-size: 13px;
  background: rgba(255, 255, 255, .8);
  border: 1px solid var(--isbn-line);
  border-radius: 999px;
}

.isbn-barcode-preview__heading > strong[data-valid="true"] {
  color: #27613d;
  border-color: rgba(39, 97, 61, .3);
}

.isbn-barcode-preview__canvas {
  display: grid;
  min-height: 260px;
  padding: clamp(24px, 5vw, 48px);
  place-items: center;
  background: #fff;
  border: 1px solid var(--isbn-line);
  border-radius: 22px;
}

.isbn-barcode-preview__canvas svg {
  display: block;
  width: min(100%, 440px);
  height: auto;
  filter: drop-shadow(0 10px 18px rgba(48, 48, 51, .07));
}

.isbn-barcode-preview__empty {
  display: grid;
  justify-items: center;
  gap: 20px;
  color: #8a8582;
  text-align: center;
}

.isbn-barcode-preview__empty i {
  width: 160px;
  height: 78px;
  background: repeating-linear-gradient(90deg, #dfd9d5 0 3px, transparent 3px 7px, #dfd9d5 7px 9px, transparent 9px 13px);
  border-right: 12px solid transparent;
  border-left: 12px solid transparent;
  opacity: .75;
}

.isbn-barcode-preview__meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.isbn-barcode-preview__meta span {
  display: grid;
  gap: 4px;
  color: var(--isbn-muted);
  font-size: 12px;
  line-height: 1.35;
}

.isbn-barcode-preview__meta b {
  color: var(--isbn-ink);
  font-size: 15px;
}

.isbn-barcode-preview__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: auto;
  padding-top: 26px;
}

.isbn-barcode-preview__actions .btn {
  transition: transform 160ms cubic-bezier(.23, 1, .32, 1);
}

.isbn-barcode-preview__actions .btn:disabled {
  opacity: .42;
  cursor: not-allowed;
}

.isbn-barcode-preview__note {
  margin: 15px 0 0;
  color: var(--isbn-muted);
  font-size: 13px;
  line-height: 1.5;
}

.isbn-barcode-page__meaning,
.isbn-barcode-page__steps,
.isbn-barcode-page__faq {
  padding: 86px 0;
}

.isbn-barcode-page__meaning {
  background: var(--isbn-paper);
}

.isbn-barcode-page__meaning-grid,
.isbn-barcode-page__faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, .65fr);
  gap: clamp(42px, 7vw, 92px);
  align-items: start;
}

.isbn-barcode-page__meaning p {
  max-width: 780px;
  margin: 20px 0 0;
}

.isbn-barcode-page__meaning aside {
  padding: 30px;
  background: #fff;
  border-left: 4px solid var(--isbn-accent);
}

.isbn-barcode-page__meaning aside strong {
  display: block;
  margin-bottom: 16px;
  font-size: 20px;
}

.isbn-barcode-page__meaning ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  color: var(--isbn-muted);
  list-style: none;
}

.isbn-barcode-page__meaning li {
  position: relative;
  padding-left: 22px;
  line-height: 1.5;
}

.isbn-barcode-page__meaning li::before {
  content: '';
  position: absolute;
  top: .66em;
  left: 0;
  width: 7px;
  height: 7px;
  background: var(--isbn-accent);
  border-radius: 50%;
}

.isbn-barcode-page__structure {
  padding: 86px 0 92px;
}

.isbn-barcode-page__section-heading {
  max-width: 880px;
}

.isbn-barcode-page__section-heading > p:last-child {
  margin: 20px 0 0;
}

.isbn-structure {
  display: grid;
  grid-template-columns: 1.05fr auto 1fr auto 1.18fr auto 1.18fr auto .9fr;
  align-items: stretch;
  gap: 12px;
  margin-top: 42px;
}

.isbn-structure > div {
  display: flex;
  min-width: 0;
  min-height: 138px;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  background: var(--isbn-soft);
  border: 1px solid rgba(255, 117, 104, .24);
  border-radius: 20px 20px 20px 5px;
}

.isbn-structure strong {
  overflow-wrap: anywhere;
  font-size: clamp(18px, 1.5vw, 22px);
  line-height: 1.2;
}

.isbn-structure span {
  color: var(--isbn-muted);
  font-size: 13px;
  line-height: 1.4;
}

.isbn-structure > i {
  align-self: center;
  color: var(--isbn-accent);
  font-size: 24px;
  font-style: normal;
}

.isbn-barcode-page__steps {
  background: #fff9ed;
}

.isbn-barcode-page__step-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 38px;
}

.isbn-barcode-page__step-grid article {
  padding: 28px;
  background: rgba(255, 255, 255, .78);
  border: 1px solid rgba(255, 117, 104, .22);
  border-radius: 22px 22px 22px 5px;
}

.isbn-barcode-page__step-grid span {
  color: var(--isbn-accent);
  font-size: 14px;
  font-weight: 700;
}

.isbn-barcode-page__step-grid h3 {
  margin: 18px 0 10px;
  font-size: 22px;
}

.isbn-barcode-page__step-grid p {
  margin: 0;
  color: var(--isbn-muted);
  font-size: 16px;
  line-height: 1.45;
}

.isbn-barcode-page__standard {
  padding: 78px 0;
  background: #fff;
}

.isbn-barcode-page__standard-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: clamp(36px, 7vw, 90px);
}

.isbn-barcode-page__standard-inner > div:first-child {
  max-width: 830px;
}

.isbn-barcode-page__standard p {
  margin: 20px 0 0;
}

.isbn-barcode-page__source-links {
  display: grid;
  gap: 12px;
}

.isbn-barcode-page__source-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-width: 250px;
  padding: 16px 18px;
  color: var(--isbn-ink);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid var(--isbn-line);
}

.isbn-barcode-page__source-links span {
  color: var(--isbn-accent);
}

.isbn-barcode-page__faq {
  background: var(--isbn-paper);
}

.isbn-barcode-page__faq-heading {
  position: sticky;
  top: 120px;
}

.isbn-barcode-page__faq-heading > p:last-child {
  margin: 20px 0 0;
}

.isbn-barcode-page__faq-list {
  border-top: 1px solid rgba(48, 48, 51, .2);
}

.isbn-barcode-page__faq-list details {
  border-bottom: 1px solid rgba(48, 48, 51, .2);
}

.isbn-barcode-page__faq-list summary {
  position: relative;
  padding: 24px 46px 24px 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
  list-style: none;
}

.isbn-barcode-page__faq-list summary::-webkit-details-marker {
  display: none;
}

.isbn-barcode-page__faq-list summary::after {
  content: '+';
  position: absolute;
  top: 22px;
  right: 8px;
  color: var(--isbn-accent);
  font-size: 26px;
  font-weight: 400;
  line-height: 1;
}

.isbn-barcode-page__faq-list details[open] summary::after {
  content: '−';
}

.isbn-barcode-page__faq-list details p {
  margin: -4px 42px 24px 0;
  color: var(--isbn-muted);
  font-size: 16px;
  line-height: 1.45;
}

.isbn-barcode-page__cta {
  padding: 86px 0;
  background: var(--isbn-accent);
}

.isbn-barcode-page__cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(36px, 7vw, 90px);
}

.isbn-barcode-page__cta .calculator-page__eyebrow,
.isbn-barcode-page__cta h2,
.isbn-barcode-page__cta p {
  color: #fff;
}

.isbn-barcode-page__cta p {
  max-width: 760px;
  margin: 18px 0 0;
}

.isbn-barcode-page__cta-actions {
  display: grid;
  gap: 12px;
  min-width: 260px;
}

.isbn-barcode-page__cta .btn-primary {
  color: var(--isbn-ink);
  background: #fff;
  border-color: #fff;
}

.isbn-barcode-page__cta .btn-outline-primary {
  color: #fff;
  border-color: rgba(255, 255, 255, .72);
}

@media (hover: hover) and (pointer: fine) {
  .isbn-barcode-tool__example:hover {
    color: var(--isbn-accent);
    background: #fff7e6;
  }

  .isbn-barcode-page__answer a:hover,
  .isbn-barcode-page__source-links a:hover {
    color: var(--isbn-accent);
  }
}

@media (min-width: 1200px) and (max-width: 1679px) {
  .isbn-barcode-page section > .container {
    padding-right: 126px;
  }
}

@media (max-width: 1199.98px) {
  .isbn-structure {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .isbn-structure > i {
    display: none;
  }
}

@media (max-width: 991.98px) {
  .isbn-barcode-page__hero {
    padding: 38px 0 48px;
  }

  .isbn-barcode-page__hero-grid,
  .isbn-barcode-page__tool-grid,
  .isbn-barcode-page__meaning-grid,
  .isbn-barcode-page__standard-inner,
  .isbn-barcode-page__faq-grid,
  .isbn-barcode-page__cta-inner {
    grid-template-columns: 1fr;
  }

  .isbn-barcode-page__hero-grid {
    gap: 28px;
  }

  .isbn-barcode-page__answer {
    max-width: 620px;
  }

  .isbn-barcode-page__tool-grid {
    gap: 26px;
  }

  .isbn-barcode-page__faq-heading {
    position: static;
  }

  .isbn-barcode-page__source-links,
  .isbn-barcode-page__cta-actions {
    width: min(100%, 420px);
  }
}

@media (max-width: 767.98px) {
  .isbn-barcode-page__hero {
    padding: 26px 0 38px;
  }

  .isbn-barcode-page h1 {
    font-size: 40px;
  }

  .isbn-barcode-page__tool-section,
  .isbn-barcode-page__meaning,
  .isbn-barcode-page__structure,
  .isbn-barcode-page__steps,
  .isbn-barcode-page__standard,
  .isbn-barcode-page__faq,
  .isbn-barcode-page__cta {
    padding: 58px 0;
  }

  .isbn-barcode-page__step-grid {
    grid-template-columns: 1fr;
  }

  .isbn-structure {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .isbn-structure > div {
    min-height: 124px;
  }
}

@media (max-width: 575.98px) {
  .isbn-barcode-page h1 {
    font-size: clamp(34px, 10.5vw, 40px);
  }

  .isbn-barcode-page__answer,
  .isbn-barcode-tool,
  .isbn-barcode-preview {
    padding: 23px;
    border-radius: 24px 24px 24px 6px;
  }

  .isbn-barcode-tool__input-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .isbn-barcode-tool input,
  .isbn-barcode-tool__example {
    width: 100%;
    border: 1px solid #cfc6c1;
    border-radius: 13px;
  }

  .isbn-barcode-tool__example {
    min-height: 46px;
  }

  .isbn-barcode-preview__heading {
    display: grid;
    gap: 14px;
  }

  .isbn-barcode-preview__heading > strong {
    justify-self: start;
  }

  .isbn-barcode-preview__canvas {
    min-height: 210px;
    padding: 24px 16px;
  }

  .isbn-barcode-preview__meta {
    grid-template-columns: 1fr 1fr;
  }

  .isbn-barcode-preview__actions {
    grid-template-columns: 1fr;
  }

  .isbn-structure {
    grid-template-columns: 1fr;
  }

  .isbn-structure > div {
    min-height: 0;
    gap: 20px;
  }

  .isbn-barcode-page__faq-list summary {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .isbn-barcode-page__start span,
  .isbn-barcode-tool__example,
  .isbn-barcode-tool__submit,
  .isbn-barcode-preview__actions .btn,
  .isbn-barcode-page__cta .btn {
    transition: none;
  }
}