/* ========================================================================
   Beyond the code — human / collaboration section (v4)
   Three layout treatments switchable via Tweaks: editorial | cards | numbered
   ======================================================================== */

.btc {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* shared item bits ------------------------------------------------------ */
.btc-kicker {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--azure-press);
}
.btc-idx {
  font-family: var(--mono);
}
.btc h3 {
  font-family: var(--font);
  color: var(--ink);
  text-wrap: balance;
}
.btc p {
  color: var(--ink-600);
  text-wrap: pretty;
}

/* ── Editorial (default) ───────────────────────────────────────────────
   Magazine-style rows: hanging label column on the left, prose on right. */
.btc.is-editorial {
  display: flex;
  flex-direction: column;
}
.btc.is-editorial .btc-entry {
  display: grid;
  grid-template-columns: minmax(150px, 220px) 1fr;
  gap: clamp(20px, 4vw, 64px);
  padding: clamp(24px, 3vw, 36px) 0;
  border-top: 1px solid var(--ink-200);
}
.btc.is-editorial .btc-entry:last-child {
  border-bottom: 1px solid var(--ink-200);
}
.btc.is-editorial .btc-aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.btc.is-editorial .btc-idx {
  font-size: 13px;
  color: var(--ink-400);
  letter-spacing: 0.04em;
}
.btc.is-editorial h3 {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.3vw, 27px);
  font-weight: 600;
  line-height: 1.2;
}
.btc.is-editorial p {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.65;
  max-width: 60ch;
}

/* ── Cards ─────────────────────────────────────────────────────────────
   Responsive grid of soft cards, same vocabulary as .work-card. */
.btc.is-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
}
.btc.is-cards .btc-entry {
  background: var(--bg);
  border: 1px solid var(--ink-200);
  border-radius: 14px;
  padding: 26px 24px;
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}
.btc.is-cards .btc-entry:hover {
  border-color: var(--baby);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.btc.is-cards .btc-idx {
  display: none;
}
.btc.is-cards h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.25;
}
.btc.is-cards p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.6;
}

/* ── Numbered ──────────────────────────────────────────────────────────
   Big ghosted index in a fixed gutter, kicker + title + body alongside. */
.btc.is-numbered {
  display: flex;
  flex-direction: column;
}
.btc.is-numbered .btc-entry {
  display: grid;
  grid-template-columns: 72px 1fr;
  grid-auto-rows: min-content;
  gap: 4px clamp(16px, 3vw, 40px);
  padding: clamp(22px, 2.6vw, 30px) 0;
  border-top: 1px solid var(--ink-200);
  align-items: start;
}
.btc.is-numbered .btc-entry:last-child {
  border-bottom: 1px solid var(--ink-200);
}
.btc.is-numbered .btc-aside {
  display: contents;
}
.btc.is-numbered .btc-idx {
  grid-column: 1;
  grid-row: 1 / span 2;
  font-size: 34px;
  font-weight: 300;
  color: var(--baby);
  line-height: 1;
}
.btc.is-numbered .btc-kicker {
  grid-column: 2;
  grid-row: 1;
  margin-bottom: 9px;
}
.btc.is-numbered .btc-main {
  grid-column: 2;
  grid-row: 2;
}
.btc.is-numbered h3 {
  margin: 0 0 9px;
  font-size: clamp(19px, 2.1vw, 24px);
  font-weight: 600;
  line-height: 1.25;
}
.btc.is-numbered p {
  margin: 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.65;
}
.btc.is-numbered .btc-main {
  padding-top: 2px;
}

/* small screens — collapse editorial/numbered to single column ---------- */
@media (max-width: 720px) {
  .btc.is-editorial .btc-entry {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .btc.is-editorial .btc-aside {
    flex-direction: row;
    align-items: baseline;
    gap: 14px;
  }
  .btc.is-numbered .btc-entry {
    grid-template-columns: 48px 1fr;
    gap: 18px;
  }
  .btc.is-numbered .btc-idx {
    font-size: 26px;
  }
}