*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-input);
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
}

.wordmark b {
  font-weight: 900;
  color: var(--color-accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 2.75rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out);
  white-space: nowrap;
}

.btn--ink {
  background: var(--color-ink);
  color: var(--color-paper);
}

.btn--ink:hover {
  background: oklch(15% 0.016 250);
}

.btn--sm {
  min-height: 2.25rem;
  padding: 0.4rem 1rem;
  font-size: var(--text-xs);
}

.seo-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-rule-2);
}

.seo-header__inner {
  width: min(100% - 2rem, 68rem);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-height: 4rem;
}

.seo-header__inner .wordmark {
  margin-right: auto;
}

.seo-crumb {
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  text-decoration: none;
  padding-block: 0.25rem;
}

.seo-crumb:hover {
  color: var(--color-accent);
}

.seo-wrap {
  width: min(100% - 2rem, 48rem);
  margin-inline: auto;
  padding-block: var(--space-xl) var(--space-2xl);
}

.article-head {
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-rule-2);
  margin-bottom: var(--space-xl);
}

.article-kicker {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  text-transform: uppercase;
}

.article-head h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 3.4vw + 0.7rem, 3rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

.article-body {
  font-size: var(--text-base);
}

.article-body h2 {
  margin: var(--space-2xl) 0 var(--space-md);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 1.8vw + 0.7rem, 1.8rem);
  line-height: 1.35;
  letter-spacing: -0.005em;
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-rule-2);
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  margin: var(--space-xl) 0 var(--space-sm);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.2rem;
}

.article-body p {
  margin: 0 0 var(--space-lg);
  color: var(--color-ink-2);
  line-height: 1.9;
}

.article-body ul,
.article-body ol {
  margin: 0 0 var(--space-lg);
  padding-left: 1.4rem;
  color: var(--color-ink-2);
  line-height: 1.9;
}

.article-body li {
  margin-bottom: var(--space-xs);
}

.article-body a {
  color: var(--color-accent-ink);
  text-decoration-color: var(--color-accent);
  text-underline-offset: 3px;
}

.article-body strong {
  color: var(--color-ink);
  font-weight: 700;
}

.article-related {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-rule-2);
}

.article-related h2,
.article-faq h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.35rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: var(--space-sm);
}

.related-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-paper-2);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-card);
  text-decoration: none;
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: border-color var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out);
}

.related-card span {
  color: var(--color-accent);
  flex: none;
}

@media (hover: hover) {
  .related-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-1px);
  }
}

.article-faq {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-rule-2);
}

.faq-item {
  border-bottom: 1px solid var(--color-rule-2);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  padding-block: var(--space-md);
  list-style-position: outside;
}

.faq-item p {
  margin: 0 0 var(--space-md);
  color: var(--color-ink-2);
  line-height: 1.8;
}

.seo-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-lg);
  align-items: center;
  width: min(100% - 2rem, 68rem);
  margin: 0 auto var(--space-3xl);
  padding: var(--space-xl);
  background: var(--color-band);
  color: var(--color-band-ink);
  border-radius: var(--radius-card);
}

.seo-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 2vw + 0.7rem, 2rem);
}

.seo-cta p {
  margin: var(--space-sm) 0 0;
  color: var(--color-band-muted);
  max-width: 42rem;
}

.seo-footer {
  border-top: 1px solid var(--color-rule-2);
  padding-block: var(--space-xl);
}

.seo-footer__inner {
  width: min(100% - 2rem, 68rem);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--text-xs);
  color: var(--color-muted);
}

.seo-footer__inner a {
  color: var(--color-muted);
  text-decoration: none;
}

.seo-footer__inner span:first-child {
  margin-right: auto;
  color: var(--color-ink);
  font-weight: 700;
}

@media (hover: hover) {
  .seo-footer__inner a:hover {
    color: var(--color-accent);
  }
}

@media (max-width: 44rem) {
  .seo-header__inner {
    min-height: 3.5rem;
  }

  .seo-crumb {
    display: none;
  }

  .seo-wrap {
    width: min(100% - 1.25rem, 48rem);
    padding-top: var(--space-lg);
  }

  .seo-cta {
    grid-template-columns: minmax(0, 1fr);
  }

  .seo-cta .btn {
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}