/* Article opening v2
   Opt-in on reviewed articles before site-wide rollout.
   The first screen prioritizes: title -> compact context -> direct answer -> article. */
.article-opening-v2 .hero h1,
html:lang(en) .article-opening-v2 .hero h1,
html:lang(ko) .article-opening-v2 .hero h1,
html:lang(zh-TW) .article-opening-v2 .hero h1 {
  max-width: 26ch;
  margin: 0 0 10px;
  font-size: clamp(1.75rem, 2.35vw, 2.125rem) !important;
  line-height: 1.42 !important;
  letter-spacing: -0.015em !important;
  text-wrap: balance;
}

.article-opening-v2 .article-region-scope {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  margin: 2px 8px 6px 0 !important;
  padding: 4px 8px;
  border: 1px solid var(--reading-border, #d7dee7);
  border-radius: 999px;
  background: var(--reading-soft, #f1f5f9);
  color: var(--reading-muted, #526176);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.3;
}

.article-opening-v2 .reading-metadata {
  display: inline-block;
  margin: 2px 0 6px !important;
  color: var(--reading-muted, #526176);
  font-size: 0.75rem;
}

.article-opening-v2 .reading-metadata summary {
  min-height: 28px;
  padding: 4px 0;
}

.article-opening-v2 .reading-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  margin: 2px 0 18px !important;
  color: var(--reading-muted, #526176);
  font-size: 0.78rem;
}

.article-opening-v2 .reading-tools button {
  min-height: 36px;
  padding: 4px 8px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--reading-link, #0b57d0);
  font: inherit;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.article-opening-v2 .reading-tools button::before {
  content: "☆";
  margin-right: 5px;
  text-decoration: none;
}

.article-opening-v2 .reading-tools button[aria-pressed="true"]::before {
  content: "★";
}

.article-opening-v2 .reading-tools a {
  color: var(--reading-muted, #526176) !important;
  font-size: 0.75rem;
}

.article-opening-v2 .content a:focus-visible {
  outline: 3px solid var(--reading-link, #0b57d0) !important;
  outline-offset: 3px;
}

html[lang] body.article-opening-v2 .main-content-column.content > .article-opening-answer,
.article-opening-v2 .content > .intro.article-opening-answer {
  margin: 18px 0 28px !important;
  padding: 0 0 0 16px !important;
  border: 0 !important;
  border-left: 4px solid var(--reading-brand, #164e63) !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  color: var(--reading-text, #233044);
  font-size: 1rem;
  line-height: 1.75;
}
html[lang] body.article-opening-v2 .main-content-column.content > .article-opening-answer::before {
  display: none !important;
  content: none !important;
}

.article-opening-v2 .article-opening-answer__title,
.article-opening-v2 .content > .article-opening-answer > .article-opening-answer__title {
  margin: 0 0 6px !important;
  padding: 0 !important;
  border: 0 !important;
  background: transparent !important;
  color: var(--reading-text, #233044) !important;
  font-size: 1.2rem !important;
  font-weight: 800;
  line-height: 1.5;
  box-shadow: none !important;
}

.article-opening-v2 .article-opening-answer p {
  margin: 0 0 6px;
}

.article-opening-v2 .article-opening-answer p:last-child {
  margin-bottom: 0;
}

.article-opening-v2 .content > .intro.article-opening-answer > strong:first-child {
  display: block;
  margin: 0 0 5px;
  color: var(--reading-text, #233044);
  font-size: 1.18rem;
  font-weight: 800;
  line-height: 1.5;
}

.article-opening-v2 .reader-toc--intl {
  margin: 22px 0 30px;
  border-block: 1px solid var(--reading-border, #cbd5e1);
}

.article-opening-v2 .reader-toc--intl > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
  padding: 10px 0;
  color: var(--reading-text, #233044);
  font-size: 0.9rem;
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}

.article-opening-v2 .reader-toc--intl > summary::-webkit-details-marker {
  display: none;
}

.article-opening-v2 .reader-toc--intl > summary::after {
  content: "＋";
  flex: 0 0 auto;
  color: var(--reading-muted, #526176);
}

.article-opening-v2 .reader-toc--intl[open] > summary::after {
  content: "−";
}

.article-opening-v2 .reader-toc--intl .intl-article-toc {
  margin: 0 !important;
  padding: 0 0 14px !important;
  border: 0 !important;
  background: transparent !important;
}

.article-opening-v2 .reader-toc--intl .intl-article-toc > h2 {
  display: none !important;
}

.article-opening-v2 .reader-toc--intl .intl-article-toc ol {
  margin: 0;
  padding-left: 1.35rem;
}

.article-opening-v2 .reader-toc--intl .intl-article-toc li + li {
  margin-top: 6px;
}

@media (max-width: 640px) {
  .article-opening-v2 .hero h1,
  html:lang(en) .article-opening-v2 .hero h1,
  html:lang(ko) .article-opening-v2 .hero h1,
  html:lang(zh-TW) .article-opening-v2 .hero h1 {
    max-width: none;
    font-size: 1.75rem !important;
    line-height: 1.45 !important;
  }

  .article-opening-v2 .reading-tools {
    margin-bottom: 14px !important;
  }

  .article-opening-v2 .reading-tools a {
    display: none;
  }

  .article-opening-v2 .article-opening-answer,
  .article-opening-v2 .content > .intro.article-opening-answer {
    margin-top: 14px !important;
    padding-left: 13px !important;
  }
}