/* ============================================================
   TOPICS — the public dossier index and the topic page (Turn 2,
   2026-09-25). From the Claude Design project "China Snapshot",
   Mobile Preview frames M4 (Topic · change over time) and M5
   (Topics). Loaded after the shared sheets on those two page
   types only (collectors/build_public_analysis.py).
   Rules: docs/DESIGN.md § Mobile Turn 2.
   ============================================================ */

/* --- M5 · the Topics index ------------------------------------------------ */
.public-topics-index .topics-intro {
  display: flex;
  max-width: 720px;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}
.public-topics-index .topics-intro h1 {
  margin: 0;
  color: var(--ink-0);
  font: 600 clamp(30px, 6vw, 44px)/1.06 var(--font-editorial, var(--serif));
  letter-spacing: -0.022em;
}
.public-topics-index .topics-intro .hero-tagline {
  margin: 0;
  color: var(--ink-1);
  font: 400 16px/1.55 var(--font-sans);
}
.topic-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
  gap: 12px;
  margin-bottom: 32px;
}
.topic-card {
  display: flex;
  min-height: 88px;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  background: var(--surface-0);
  color: var(--ink-0);
  text-decoration: none;
  transition: border-color var(--dur-2, 140ms) var(--ease-out, ease);
}
.topic-card:hover {
  border-color: var(--ink-0);
}
.topic-card-top {
  display: flex;
  width: 100%;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.topic-card-name {
  margin: 0;
  color: var(--ink-0);
  font: 620 16px/1.3 var(--font-sans);
  letter-spacing: 0;
}
.topic-card-meta {
  flex: none;
  color: var(--ink-2);
  font: 400 11px/1.3 var(--mono);
  white-space: nowrap;
}
.topic-card-headline {
  color: var(--ink-1);
  font: 400 15.5px/1.45 var(--font-editorial, var(--serif));
}

/* --- M4 · the topic page ---------------------------------------------------- */
.public-topic-page .dossier-edition-back [lang="zh-CN"] {
  font-family: var(--font-cjk);
}

/* How the reading changed: the current version selected, earlier ones
   locked. A card on the ground, like the design. */
.topic-versions {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 12px;
  margin: 8px 0 28px;
  padding: 18px clamp(16px, 3vw, 24px);
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  background: var(--surface-0);
}
.topic-versions-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
}
.topic-versions-head h2 {
  margin: 0;
  color: var(--ink-0);
  font: 620 16px/1.3 var(--font-sans);
  letter-spacing: 0;
}
.topic-versions-head .d-meta {
  color: var(--ink-2);
  font: 400 11.5px/1.3 var(--mono);
  letter-spacing: 0;
  text-transform: none;
}
.topic-version-strip {
  display: grid;
  grid-auto-columns: minmax(96px, 1fr);
  grid-auto-flow: column;
  overflow-x: auto;
  scrollbar-width: none;
}
.topic-version-strip::-webkit-scrollbar {
  display: none;
}
.topic-version {
  display: flex;
  min-height: 92px;
  flex-direction: column;
  gap: 6px;
  padding: 12px 12px 8px 0;
  border-top: 3px solid var(--rule-strong);
  color: var(--ink-1);
  text-decoration: none;
}
.topic-version-top {
  display: flex;
  width: 100%;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2px 6px;
  font: 400 12px/1.2 var(--mono);
}
.topic-version-top b {
  font-weight: 600;
}
.topic-version-top span {
  color: var(--ink-2);
}
.topic-version-note {
  font: 400 13px/1.45 var(--font-sans);
}
.topic-version.is-locked {
  color: var(--ink-2);
}
.topic-version.is-locked .topic-version-note::before {
  content: "▢ ";
  font-family: var(--mono);
}
.topic-version.is-current {
  border-top-color: var(--ink-0);
  color: var(--ink-0);
}
.topic-version-panel {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px;
  border-radius: 6px;
  background: var(--ground);
}
.topic-version-label {
  color: var(--ink-2);
  font: 600 11px/1.3 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.topic-version-body p {
  margin: 0;
  color: var(--ink-0);
  font: 400 14.5px/1.55 var(--font-sans);
}
.topic-version-body p + p {
  margin-top: 8px;
}

/* Ask about this topic: the one verb, inline, in the rail. */
.topic-ask {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  background: var(--surface-0);
}
.topic-ask-title {
  color: var(--ink-0);
  font: 620 15px/1.3 var(--font-sans);
}
.topic-ask-button {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
  color: var(--ink-0);
  font: 400 14px/1.4 var(--font-sans);
  text-decoration: none;
}
.topic-ask-button:hover {
  border-color: var(--accent-brand);
}
.topic-ask-tag {
  flex: none;
  color: var(--accent-brand);
  font: 600 11px/1 var(--mono);
}
.topic-ask-note {
  color: var(--ink-2);
  font: 400 12.5px/1.45 var(--font-sans);
}

/* --- phone --------------------------------------------------------------- */
@media (max-width: 639px) {
  .public-topics-index main.page,
  .public-topic-page main.page {
    padding-top: 24px;
  }
  .public-topic-page .dossier-edition-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding-bottom: 0;
    border-bottom: 0;
  }
  .public-topic-page .dossier-edition-back {
    min-height: 36px;
    padding: 0;
    border: 0;
    background: none;
    color: var(--ink-2);
    font: 400 12px/1.3 var(--mono);
    letter-spacing: 0;
    text-transform: none;
  }
  .public-topic-page .dossier-edition-nav .ui-button {
    min-height: 36px;
    padding: 0 10px;
    font-size: 12px;
  }
  .public-topic-page .dossier-hero {
    padding: 10px 0 0;
    border: 0;
  }
  .public-topic-page .dossier-hero .kicker {
    display: none;
  }
  .public-topic-page .dossier-hero h1 {
    font-size: 30px;
    line-height: 1.06;
    letter-spacing: -0.022em;
  }
  .public-topic-page .dossier-hero .discovery-dek {
    color: var(--ink-1);
    font: 400 15.5px/1.55 var(--font-sans);
  }
  /* The meta strip restates what the version strip and the evidence head
     already print (revision, date, cited count), so the phone drops the
     duplicate, not the facts. */
  .public-topic-page .dossier-meta-strip {
    display: none;
  }
  .public-topic-page .topic-versions {
    margin-top: 24px;
  }
  .public-topic-page .dossier-read {
    padding-top: 0;
    border-top: 0;
  }
  .public-topic-page .dossier-read-head {
    font-size: 23px;
    line-height: 1.18;
  }
  .public-topic-page .dossier-rail {
    display: flex;
    flex-direction: column;
    gap: 28px;
  }
  .public-topic-page .dossier-hero-art {
    margin-top: 32px;
  }

  /* Evidence: number, title, then publisher · date, as the design lists it.
     Nothing is dropped from the four-column table; it is re-flowed. */
  .public-topic-page .dossier-sources .section-head {
    padding-bottom: 10px;
    border-bottom: 1px solid var(--ink-0);
  }
  .public-topic-page.discovery-dossier-page .dossier-source-table,
  .public-topic-page.discovery-dossier-page .dossier-source-table tbody {
    display: block;
    width: 100%;
  }
  .public-topic-page.discovery-dossier-page .dossier-source-table thead {
    display: none;
  }
  .public-topic-page.discovery-dossier-page .dossier-source-table tbody tr {
    display: grid;
    grid-template-columns: 22px auto minmax(0, 1fr);
    gap: 4px 10px;
    padding: 12px 0;
    border-bottom: 1px solid var(--rule);
  }
  .public-topic-page.discovery-dossier-page .dossier-source-table td {
    padding: 0;
    border: 0;
    white-space: normal;
  }
  .public-topic-page.discovery-dossier-page .dossier-source-table td.tt-num {
    grid-row: 1 / span 2;
    padding-top: 2px;
    color: var(--accent-brand);
    font: 600 11px/1.3 var(--mono);
  }
  .public-topic-page.discovery-dossier-page .dossier-source-table td.tt-title {
    grid-column: 2 / 4;
    font: 500 14.5px/1.45 var(--font-sans);
  }
  .public-topic-page.discovery-dossier-page .dossier-source-table td.tt-title a::after {
    content: " ↗";
  }
  .public-topic-page.discovery-dossier-page .dossier-source-table td.tt-meta {
    color: var(--ink-2);
    font: 400 11.5px/1.3 var(--mono);
  }
  .public-topic-page.discovery-dossier-page .dossier-source-table td.tt-meta + td.tt-meta::before {
    content: "· ";
  }
}