/**
 * Lantern — single shared card system stylesheet.
 * Source of truth for .exploreCard, rail/opened, badges, media, detail overlay.
 * See docs/ui/CARD_SYSTEM.md. No page may define structural card-shell CSS.
 */

/* ===== CARD SHELL ===== */
.exploreCard{
  flex: 0 0 auto;
  min-width: 0;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.04));
  border-radius: var(--r);
  overflow: hidden;
  padding: 18px;
  display: flex;
  flex-direction: column;
  transition: transform .15s ease, box-shadow .2s ease;
}
.exploreCard:hover{ transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.3); }
.exploreCard.hero{ min-width: 300px; max-width: 340px; }
.exploreCard.medium{ min-width: 260px; max-width: 280px; }
.exploreCard.compact{ min-width: 220px; max-width: 260px; }
.exploreCard.curation-pick{ border-left: 6px solid rgba(56,208,124,.6); }
.exploreCard.curation-featured{ border-color: rgba(156,100,255,.5); background: linear-gradient(180deg, rgba(156,100,255,.12), rgba(156,100,255,.04)); }
.exploreCard--activatable:focus-visible{ outline: 2px solid var(--accent); outline-offset: 3px; }
.exploreCard--activatable,
.exploreCard[role="link"],
.exploreCard[role="button"]{ cursor: pointer; }
a.exploreCard{ display: block; text-decoration: none; color: inherit; }
.gameHighlightCard{ min-width: 240px; max-width: 280px; }
.gameHighlightLabel{ font-size: 18px; color: var(--muted); margin-bottom: 6px; }
.gameHighlightHeadline{ font-weight: 900; font-size: 22px; line-height: 1.3; margin-bottom: 4px; }
.gameHighlightBody{ font-size: 20px; color: var(--muted); }

.exploreCard--rail{ }
.exploreCard--opened{ }
.exploreCard--previewRail{ }
.exploreCard.exploreCard--learning{ border: 2px solid rgba(56,208,124,.45); background: linear-gradient(180deg, rgba(56,208,124,.14), rgba(20,45,35,.35)); min-width: 288px; max-width: 340px; }
.exploreCard.exploreCard--learning:hover{ box-shadow: 0 8px 28px rgba(56,208,124,.2); }

/* ===== VISUAL ===== */
.exploreCardVisual{
  aspect-ratio: 16/9;
  overflow: hidden;
  border-radius: 12px;
  margin-bottom: 10px;
  background: rgba(0,0,0,.25);
  position: relative;
  min-height: 120px;
}
.exploreCardVisual img{ width: 100%; height: 100%; object-fit: cover; display: block; }
.lcCardImg{ width: 100%; height: 100%; object-fit: cover; display: block; min-height: 120px; }
.exploreCardVisualIconRail{ aspect-ratio: auto; min-height: 96px; max-height: 120px; display: flex; align-items: center; justify-content: center; }
.exploreCardVisualIconRail--pulse{ min-height: 72px; }
.exploreCardVisualEmoji{ font-size: 42px; line-height: 1; }
.exploreCardMuted{ opacity: .45; filter: grayscale(0.85); }

/* ===== TYPE BADGE (corner) ===== */
.exploreCardTypeBadge{
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 6px 8px;
  border-radius: 8px;
  font-size: 18px;
  background: rgba(0,0,0,.6);
  color: #fff;
  font-weight: 800;
  z-index: 2;
}

/* ===== HEADER / TITLE ROW ===== */
.exploreCardHd{ display: flex; align-items: flex-start; gap: 10px; margin-bottom: 10px; }
.exploreCardHd--preview{ margin-bottom: 6px; align-items: center; flex-wrap: wrap; }
.exploreTypeIcon{ font-size: 30px; flex-shrink: 0; }
.exploreTitle{ font-weight: 900; font-size: 24px; line-height: 1.2; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ===== IDENTITY / AVATAR ===== */
.exploreCardIdentity{ display: flex; align-items: center; gap: 14px; margin-bottom: 10px; flex-shrink: 0; padding-left: 2px; }
.exploreCardAvatar{ font-size: 28px; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.exploreCardAvatarImg{ width: 36px; height: 36px; border-radius: 50%; object-fit: cover; display: block; }
.exploreCardAvatar--fallback{ display: none; }
.exploreCardAvatar--fallback.avatar-show{ display: flex; }
.exploreCardAvatarImg--hidden{ display: none; }
.identity-chip.frame-gold .exploreCardAvatarImg,
.identity-chip.frame-gold .exploreCardAvatar{ border-radius: 50%; box-shadow: 0 0 0 2px rgba(242,194,48,.5); }
.identity-chip.frame-blue .exploreCardAvatarImg,
.identity-chip.frame-blue .exploreCardAvatar{ border-radius: 50%; box-shadow: 0 0 0 2px rgba(90,167,255,.5); }
.identity-chip.frame-green .exploreCardAvatarImg,
.identity-chip.frame-green .exploreCardAvatar{ border-radius: 50%; box-shadow: 0 0 0 2px rgba(56,208,124,.5); }
.identity-chip.frame-purple .exploreCardAvatarImg,
.identity-chip.frame-purple .exploreCardAvatar{ border-radius: 50%; box-shadow: 0 0 0 2px rgba(156,100,255,.5); }
.identity-chip.frame-silver .exploreCardAvatarImg,
.identity-chip.frame-silver .exploreCardAvatar{ border-radius: 50%; box-shadow: 0 0 0 2px rgba(200,200,220,.6); }

/* ===== TEXT BLOCKS ===== */
.exploreAuthor{ font-weight: 800; color: var(--ink); padding-right: 4px; }
.exploreCaption{ color: var(--muted); font-size: 20px; line-height: 1.35; margin-top: 6px; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.exploreMeta{ margin-top: auto; padding-top: 12px; border-top: 1px solid rgba(255,255,255,.08); font-size: 20px; color: var(--muted); }
.exploreCardMetaOneLine{ font-size: 20px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 6px; line-height: 1.3; flex-shrink: 0; }
.exploreCardFoot{ margin-top: auto; padding-top: 10px; border-top: 1px solid rgba(255,255,255,.08); display: flex; align-items: center; justify-content: flex-end; }
.exploreCardFootHint{ font-size: 22px; font-weight: 900; color: var(--accent); }

/* ===== CURATION BADGES (title row) ===== */
.lanternBadge{ display: inline-block; padding: 4px 10px; border-radius: 8px; font-size: 18px; font-weight: 800; margin-left: 8px; }
.lanternBadge.pick{ background: rgba(56,208,124,.2); border: 1px solid rgba(56,208,124,.5); color: var(--good); }
.lanternBadge.featured{ background: rgba(156,100,255,.2); border: 1px solid rgba(156,100,255,.5); color: #b794f6; }

/* ===== AUTHOR BADGE (opened/news) ===== */
.exploreCard .authorBadge{ display: inline-block; padding: 6px 12px; border-radius: 8px; font-weight: 900; font-size: 18px; }
.exploreCard .authorBadge.student{ background: rgba(90,167,255,.2); border: 1px solid rgba(90,167,255,.4); }
.exploreCard .authorBadge.teacher{ background: rgba(56,208,124,.2); border: 1px solid rgba(56,208,124,.4); }
.exploreCard .authorBadge.staff{ background: rgba(156,100,255,.2); border: 1px solid rgba(156,100,255,.4); }
.exploreCard .authorBadge.admin{ background: rgba(242,194,48,.2); border: 1px solid rgba(242,194,48,.4); }

/* ===== MEDIA BLOCK (inside card visual; from LanternMedia) ===== */
.lanternCardNewsMedia{
  margin-bottom: 10px;
  max-height: 160px;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,.2);
}
.lanternCardNewsMedia img{ width: 100%; height: auto; display: block; max-height: 180px; object-fit: cover; }
.lanternCardNewsMedia video{ width: 100%; max-height: 160px; display: block; border-radius: 12px; border: 1px solid var(--line); background: #1a252f; }
.lanternCardNewsMedia a{ word-break: break-all; font-size: 20px; color: var(--accent); }
.lanternCardNewsMedia--img{ min-height: 100px; }
.lanternCardNewsMedia--video{ min-height: 120px; }
.lanternCardNewsMedia--link{ padding: 10px; }
.lanternCardNewsMedia .lcCardVideo{ max-width: 100%; max-height: 160px; border-radius: 12px; border: 1px solid var(--line); display: block; width: 100%; background: #1a252f; }
.lanternCardNewsMedia .lcCardLink{ word-break: break-all; font-size: 20px; color: var(--accent); }
.exploreCard .exploreCardVisual .lanternCardNewsMedia img{ max-height: 180px; }
.exploreCard .exploreCardVisual .lanternCardNewsMedia video{ max-width: 100%; max-height: 160px; border-radius: 12px; border: 1px solid var(--line); }

/* ===== RAIL SIZING HELPERS ===== */
.exploreCard.medium.railCardShell{ min-width: 240px; max-width: 280px; flex-shrink: 0; }
.exploreCard.compact.railCardShell{ min-width: 240px; max-width: 280px; flex-shrink: 0; }
.exploreCardActivityPulse.railCardShell{ min-width: 260px; max-width: 280px; flex-shrink: 0; }
.exploreCardOpened .exploreCardOpenedBody{ -webkit-line-clamp: unset; display: block; max-height: none; white-space: pre-wrap; word-break: break-word; margin-top: 10px; }
.missionSpotlightCard{ min-width: 280px; max-width: 320px; }
.missionSpotlightCard .exploreCardVisual{ min-height: 120px; }
.pollCard .exploreCardVisual{ min-height: 100px; }
.gameHighlightCard:hover{ background: rgba(90,167,255,.08); box-shadow: 0 4px 16px rgba(0,0,0,.25); }

/* ===== DETAIL OVERLAY (opened mode modal) ===== */
.lanternCardDetailOverlay{
  position: fixed; inset: 0; z-index: 10000;
  background: rgba(0,0,0,.78);
  display: none;
  align-items: flex-end;
  justify-content: center;
  padding: 12px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.lanternCardDetailOverlay.show{ display: flex; }
.lanternCardDetailModal{
  width: 100%;
  max-width: 520px;
  max-height: 92vh;
  overflow-y: auto;
  margin-top: auto;
  background: linear-gradient(180deg, #152238, #0f1a2e);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px 18px 24px;
  position: relative;
  box-shadow: var(--shadow);
}
.lanternCardDetailClose{
  position: absolute;
  top: 12px;
  right: 12px;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,.3);
  color: var(--ink);
  font-size: 24px;
  cursor: pointer;
  font-weight: 800;
}
.lanternCardDetailVisual{ border-radius: 14px; overflow: hidden; margin-bottom: 14px; background: rgba(0,0,0,.25); }
.lanternCardDetailVisualInner .exploreCardVisual{ margin: 0; border-radius: 0; }
.lanternCardDetailTitle{ font-size: clamp(26px, 5vw, 32px); font-weight: 1000; margin: 0 52px 8px 0; line-height: 1.15; }
.lanternCardDetailMeta{ font-size: 22px; color: var(--muted); margin-bottom: 14px; }
.lanternCardDetailCaption{ font-size: 22px; line-height: 1.4; color: var(--ink); white-space: pre-wrap; word-break: break-word; }
.lanternCardDetailBody{ }
.lanternCardDetailActions{ margin-top: 16px; }
.lanternCardDetailReactions{ margin-top: 18px; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.1); }
.lanternCardDetailMuted{ font-size: 20px; color: var(--muted); margin: 0; }
.lanternCardDetailPostRx{ display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.lanternCardDetailRxLabel{ font-size: 20px; color: var(--muted); font-weight: 800; margin-right: 4px; }
.lanternCardDetailRxBtn{
  min-width: 52px;
  height: 52px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.08);
  font-size: 26px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.lanternCardDetailRxBtn.is-on{ box-shadow: 0 0 0 2px var(--accent); background: rgba(90,167,255,.2); }

/* ===== STUDIO MOCK SROLLER (contribute page layout override only) ===== */
#studioMockScroller .exploreCard.compact{ min-width: 180px; max-width: 220px; }
#studioMockScroller .exploreCard.compact.studioScrollerCardActive{ box-shadow: 0 0 0 2px rgba(90,167,255,.45); border-radius: 14px; }
#studioMockScroller .lanternCardNewsMedia{ margin-bottom: 8px; }
#studioMockScroller .lanternCardNewsMedia img{ width: 100%; height: auto; display: block; }
#studioMockScroller .lanternCardNewsMedia video{ width: 100%; max-height: 160px; display: block; border-radius: 12px; }

/* ===== OPENED BODY (news/studio full preview) ===== */
.exploreCardOpened.exploreCardOpened--fullWidth{ max-width: 100%; }
.exploreCaption.exploreCaption--category{ font-weight: 800; color: var(--accent); margin-top: 4px; }
.exploreCaption.exploreCaption--muted{ font-size: 20px; color: var(--muted); margin-top: 12px; }
.exploreCaption.exploreCaption--createdBy{ font-size: 20px; color: var(--muted); margin-top: 4px; }
.exploreCardActivityPulse .exploreTitle{ font-size: 22px; }
.exploreCardOpenedBody{ white-space: pre-wrap; word-break: break-word; }
#studioFullPreview .exploreCardOpenedBody{ margin-top: 14px; }