/* Keep answer explanations locked until the quiz is completed. */
.quiz-shell:not(.quiz-complete) .quiz-learning-card {
  display: none;
}


.notification-nav-link{position:relative;width:34px!important;height:34px;padding:0!important;display:inline-flex!important;align-items:center;justify-content:center}
.notification-bell{width:19px;height:19px;display:block}
.notification-nav-link .notification-nav-badge{position:absolute;top:-3px;right:-5px;min-width:16px;height:16px;margin:0;padding:0 4px}


.quiz-forum-discussion{margin-top:28px;padding:24px;border:1px solid var(--border);border-radius:18px;background:rgba(7,15,52,.62);display:flex;align-items:center;justify-content:space-between;gap:20px}
.quiz-forum-discussion h2{margin:0 0 8px}
.quiz-forum-discussion p{margin:0;color:var(--muted);line-height:1.55}
.quiz-forum-discussion .button{flex:0 0 auto}
@media(max-width:700px){.quiz-forum-discussion{align-items:flex-start;flex-direction:column}.quiz-forum-discussion .button{width:100%}}


/* Quiz desktop two-column layout */
.quiz-top-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 24px;
  align-items: start;
  margin-bottom: 30px;
}
.quiz-info-column,
.quiz-play-column {
  min-width: 0;
}
.quiz-info-column {
  display: grid;
  gap: 18px;
}
.quiz-info-column .quiz-context-card,
.quiz-info-column .quiz-about-card,
.quiz-info-column .quiz-learning-intro,
.quiz-play-column .quiz-stage,
.quiz-play-column .results-card {
  max-width: none;
  margin-inline: 0;
}
.quiz-info-column .quiz-context-card,
.quiz-info-column .quiz-about-card,
.quiz-info-column .quiz-learning-intro {
  margin-bottom: 0;
}
.quiz-play-column {
  position: sticky;
  top: 92px;
}
.quiz-play-column .quiz-stage,
.quiz-play-column .results-card {
  width: 100%;
}
.quiz-play-column .quiz-stage {
  min-height: 420px;
}
.quiz-play-column .results-card {
  min-height: 420px;
}

@media (max-width: 900px) {
  .quiz-top-layout {
    grid-template-columns: 1fr;
  }
  .quiz-play-column {
    position: static;
  }
  .quiz-play-column .quiz-stage,
  .quiz-play-column .results-card {
    min-height: 0;
  }
}


/* Quiz page: related links and SEO question disclosure */
.quiz-related-section .section-heading {
  align-items: flex-end;
  gap: 24px;
}
.quiz-related-section .section-heading > div {
  min-width: 0;
}
.quiz-related-section .text-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 9px 15px;
  border: 1px solid var(--border);
  border-radius: 11px;
  color: var(--cyan, #35c7ff);
  background: rgba(53,199,255,.06);
  text-decoration: none;
  font-weight: 800;
  white-space: nowrap;
  transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}
.quiz-related-section .text-link:hover {
  transform: translateY(-1px);
  border-color: rgba(53,199,255,.32);
  background: rgba(53,199,255,.11);
}
.quiz-seo-content {
  max-width: 900px;
}
.quiz-seo-content details {
  background: var(--panel, #fff);
}
.quiz-seo-content summary {
  min-height: 52px;
  display: flex;
  align-items: center;
  color: var(--text, #182438);
  background: transparent;
}
.quiz-seo-content summary::marker {
  color: var(--cyan, #087fa8);
}
.quiz-seo-content ol {
  color: var(--muted);
}
@media (max-width: 700px) {
  .quiz-related-section .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }
  .quiz-related-section .text-link {
    width: 100%;
  }
}


/* Two-column quiz layout: keep the learning panel readable in the narrower info column */
.quiz-info-column .quiz-learning-intro {
  grid-template-columns: 1fr;
}
.quiz-info-column .quiz-learning-intro-links {
  grid-template-columns: 1fr;
}


/* Two-column quiz layout: stack the About card contents inside the narrow info column */
.quiz-info-column .quiz-about-card {
  grid-template-columns: 1fr;
  gap: 18px;
}
.quiz-info-column .quiz-about-card h2 {
  max-width: none;
}
.quiz-info-column .quiz-about-card p:not(.eyebrow) {
  max-width: none;
}


/* Quiz sharing */
.quiz-share-card{margin-top:28px;padding:24px;border:1px solid var(--border);border-radius:18px;background:rgba(7,15,52,.62);display:grid;grid-template-columns:minmax(260px,1fr) auto;align-items:center;gap:24px}
.quiz-share-copy{min-width:0}
.quiz-share-copy h2{margin:0 0 8px}
.quiz-share-copy p:not(.eyebrow){margin:0;color:var(--muted);line-height:1.55;max-width:520px}
.quiz-share-actions{display:flex;align-items:center;justify-content:flex-end;gap:8px;flex-wrap:wrap;max-width:100%}
.quiz-share-actions .button{white-space:nowrap;flex:0 0 auto}
.quiz-share-feedback{grid-column:1 / -1;display:block;min-height:18px;color:var(--muted);font-size:12px;text-align:right}
@media(max-width:900px){.quiz-share-card{grid-template-columns:1fr;align-items:start}.quiz-share-actions{justify-content:flex-start;width:100%}.quiz-share-feedback{text-align:left}}
@media(max-width:560px){.quiz-share-actions{display:grid;grid-template-columns:1fr 1fr;width:100%}.quiz-share-actions .button{width:100%}.quiz-share-actions .button:first-child{grid-column:1 / -1}}


.challenge-result {
  grid-column: 1 / -1;
  margin: 18px 0 0;
  padding: 18px 20px;
  border: 1px solid rgba(126,223,255,.14);
  border-radius: 14px;
  background: rgba(7,15,52,.55);
}
.challenge-result h2 { margin: 0 0 8px; font-size: 22px; }
.challenge-result p { margin: 6px 0 0; color: var(--muted); }
.challenge-result .eyebrow { margin-bottom: 4px; }
.challenge-result-scoreline {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.challenge-result-scoreline strong { font-size: 20px; }
.challenge-result-scoreline span { opacity: .6; font-weight: 800; }


/* Challenge result layout: prevent the comparison panel being squeezed. */
.results-card .challenge-result {
  display: block;
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  grid-column: auto;
  text-align: left;
}
.results-card .challenge-result-scoreline {
  justify-content: flex-start;
}
.results-card .challenge-result-scoreline strong {
  min-width: 0;
}


/* Challenge results inside the completed quiz grid. Keep the challenge
   comparison in the content column so it cannot collide with the actions. */
.quiz-shell.quiz-complete .results-card > #challenge-result {
  grid-column: 1;
  grid-row: 7;
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  margin: 22px 0 0;
  text-align: left;
}
.quiz-shell.quiz-complete .results-card > #challenge-result h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.15;
}
.quiz-shell.quiz-complete .results-card > #challenge-result .challenge-result-scoreline {
  margin-top: 10px;
}
.quiz-shell.quiz-complete .results-card > .result-actions {
  grid-column: 2;
  grid-row: 1 / span 7;
}

/* Quiz AdSense layout */
.quiz-page-grid.has-quiz-ads {
  width: min(1240px, calc(100% - 36px));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 160px minmax(0, 900px) 160px;
  align-items: start;
  justify-content: center;
  gap: 18px;
}

.quiz-page-grid.has-quiz-ads .quiz-shell {
  min-width: 0;
  width: 100%;
}

.quiz-ad {
  width: 160px;
  min-height: 600px;
  position: sticky;
  top: 102px;
  overflow: hidden;
  display: block;
}

.quiz-ad .adsbygoogle {
  width: 160px;
  min-height: 600px;
}

.quiz-ad-mobile {
  display: none;
}

/* Comments */
.quiz-comments-section {
  max-width: 900px;
  margin: 18px auto 0;
  padding: 24px 0 50px;
}

.comments-card,
.comment-form-card {
  border-color: var(--public-line);
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(15,27,52,.82), rgba(9,16,31,.90));
}

.quiz-comment {
  border-color: var(--public-line);
}

.comment-form-card {
  margin-top: 12px;
  padding: 20px;
}

.quiz-comment-form textarea {
  border-color: var(--public-line);
  border-radius: 9px;
  background: rgba(4,9,18,.68);
}

/* Library category navigation. */
.library-category-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 24px;
}

.library-category-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 10px;
  border: 1px solid var(--public-line, rgba(164,192,240,.16));
  border-radius: 999px;
  color: var(--muted-strong, #c4cedb);
  background: rgba(255,255,255,.025);
  font-size: 12px;
  font-weight: 750;
  line-height: 1.2;
  text-decoration: none;
  transition: border-color 140ms ease, background 140ms ease, color 140ms ease, transform 140ms ease;
}

.library-category-links a span {
  color: var(--cyan-soft, #73dbff);
  font-size: 11px;
  font-weight: 850;
}

.library-category-links a:hover {
  transform: translateY(-1px);
  border-color: rgba(126,223,255,.32);
  color: #fff;
  background: rgba(126,223,255,.06);
}


/* ===== Quiz page and leaderboard styles moved from style.css ===== */
/* Leaderboard page */
.leaderboard-page {
  padding-top: 10px;
}
.leaderboard-page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}
.leaderboard-page-header h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.08;
}
.leaderboard-page-meta {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}
.leaderboard-quiz-picker {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  max-width: 760px;
  margin: 0 0 18px;
}
.leaderboard-quiz-picker label {
  color: var(--muted-strong);
  font-size: 13px;
  font-weight: 800;
}
.leaderboard-quiz-picker select {
  width: 100%;
  min-width: 0;
  min-height: 44px;
}
.leaderboard-page-card {
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(14, 30, 60, 0.9), rgba(8, 16, 32, 0.96));
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.18);
}
.leaderboard-page-list {
  display: grid;
  gap: 6px;
}
.leaderboard-page-row {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  min-height: 52px;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(20, 34, 56, 0.5);
  transition: background 0.15s ease, transform 0.15s ease;
}
.leaderboard-page-row:hover {
  background: rgba(28, 46, 74, 0.68);
}
.leaderboard-page-row-top {
  min-height: 62px;
  background: rgba(32, 52, 82, 0.72);
}
.leaderboard-page-rank {
  color: var(--muted);
  font-weight: 800;
  font-size: 15px;
}
.leaderboard-page-row-top .leaderboard-page-rank {
  font-size: 22px;
}
.leaderboard-page-row strong {
  overflow: hidden;
  text-overflow: ellipsis;
}
.leaderboard-page-score {
  font-weight: 800;
  white-space: nowrap;
}
.leaderboard-page-score small {
  color: var(--muted);
  font-weight: 600;
}


/* Quiz leaderboard */
.quiz-leaderboard {
  margin: 24px 0 0;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: rgba(12, 20, 34, 0.72);
}
.quiz-leaderboard-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.quiz-leaderboard-heading h2 {
  margin: 0;
  font-size: 22px;
}
.quiz-leaderboard-heading .eyebrow {
  margin: 0 0 5px;
}
.quiz-leaderboard-heading > span {
  color: var(--muted);
  font-size: 13px;
}
.quiz-leaderboard-list {
  display: grid;
  gap: 6px;
}
.leaderboard-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  border-radius: 10px;
  background: rgba(20, 34, 56, 0.55);
}
.leaderboard-rank {
  color: var(--muted);
  font-weight: 800;
}
.leaderboard-score {
  color: var(--muted-strong);
  font-weight: 700;
}
.leaderboard-empty {
  margin: 0;
  color: var(--muted);
}


/* SEO question list */
.quiz-learning-card {
  max-width: 900px;
  margin: 28px auto 0;
  padding: clamp(24px, 4vw, 34px);
  border: 1px solid rgba(120, 167, 255, 0.26);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(14, 30, 93, 0.88), rgba(9, 18, 65, 0.82));
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.2);
}

.quiz-learning-card .section-heading {
  margin-bottom: 22px;
}

.quiz-learning-card .section-heading h2 {
  margin: 0;
  font-size: clamp(26px, 4vw, 38px);
}

.quiz-learning-card .section-heading > div > p:last-child {
  max-width: 720px;
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.quiz-learning-list {
  display: grid;
  gap: 12px;
}

.quiz-learning-item {
  padding: 20px 22px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  background: rgba(4, 12, 49, 0.48);
}

.quiz-learning-number {
  display: inline-flex;
  margin-bottom: 8px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.quiz-learning-item h3 {
  margin: 0;
  font-size: 19px;
  line-height: 1.4;
}

.quiz-learning-answer {
  margin: 12px 0 0;
  color: #dce8ff;
  line-height: 1.55;
}

.quiz-learning-explanation {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.quiz-learning-explanation::before {
  content: "Why it matters";
  display: block;
  margin-bottom: 3px;
  color: var(--yellow);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.quiz-seo-content {
  max-width: 700px;
  margin: 24px auto 40px;
}
.quiz-seo-content details {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(14, 30, 60, 0.92), rgba(9, 18, 38, 0.96));
  box-shadow: var(--shadow);
}
.quiz-seo-content summary {
  position: relative;
  padding: 15px 20px;
  color: #fff;
  font-weight: 800;
  font-size: 15px;
  cursor: pointer;
  list-style-position: inside;
  user-select: none;
}
.quiz-seo-content summary::marker {
  color: var(--muted);
}
.quiz-seo-content details[open] summary {
  border-bottom: 1px solid var(--border);
}
.quiz-seo-content ol {
  margin: 0;
  padding: 18px 24px 20px 48px;
}
.quiz-seo-content li {
  padding: 8px 0 8px 4px;
  color: #dce5f2;
  line-height: 1.55;
}
.quiz-seo-content li + li {
  border-top: 1px solid rgba(170,192,224,0.07);
}

/* Comments */
.quiz-comments-section .section-heading {
  display: block;
  margin-bottom: 16px;
}
.quiz-comments-section .section-heading .eyebrow {
  margin-bottom: 6px;
}
.quiz-comments-section .section-heading h2 {
  margin: 0;
  line-height: 1.15;
}
.quiz-comments-section .section-heading > p:last-child {
  max-width: 620px;
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.55;
}
.comments-card {
  border-radius: var(--radius-lg);
  box-shadow: none;
  padding: 0;
}
.comments-empty {
  margin: 0;
  padding: 22px 20px;
  text-align: center;
  color: var(--muted);
}
.comment-form-card {
  margin-top: 14px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: rgba(12, 20, 34, 0.72);
}
#quiz-comment-composer { padding: 18px; border-bottom-color: rgba(170,192,224,0.09); }
.comment-form label { color: var(--muted-strong); font-size: 13px; }
.comment-form textarea { min-height: 96px; padding: 11px 13px; border-radius: 10px; }
.quiz-comment-form {
  display: grid;
  gap: 14px;
}
.quiz-comment-form label {
  display: grid;
  gap: 7px;
}
.quiz-comment-form textarea {
  width: 100%;
  box-sizing: border-box;
}
.quiz-comment-form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.quiz-comment-form-row small {
  color: var(--muted);
  line-height: 1.45;
}

.comment-thread { border-top-color: rgba(170,192,224,0.08); }
.comment-card { padding: 17px 18px; }
.comment-card p { color: #d5dfec; }
.comment-meta span { color: #7f8fa5; }
.comment-replies { background: rgba(0,0,0,0.12); border-left-color: rgba(53,199,255,0.18); }
.comment-action { border-color: rgba(170,192,224,0.16); color: #aab8ca; background: rgba(255,255,255,0.02); }
.comment-action:hover { border-color: rgba(53,199,255,0.32); color: #fff; }

/* Quiz controls: report link on the left, next-question action on the right. */
.quiz-controls {
  justify-content: space-between;
  align-items: center;
}
.quiz-controls #report-question {
  order: -1;
  min-height: 40px;
  padding: 9px 14px;
  font-size: 13px;
}