/* ============================================================
   Builder-Agent Integration Kit — shared components (bk-*)
   Monochrome, theme-aware. Relies on the site design tokens
   (--text, --bg, --line, --bg-subtle, --font-display, --font-mono,
   --small-size, --mono-size, --ease-out-smooth, --ease-out-gentle).
   Namespaced bk- so it never collides with page styles.
   ============================================================ */

/* ---- Logo wall (credibility) ---- */
.bk-wall {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1px;
  margin-top: 2rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--line);
}
.bk-wall-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1.6rem 1rem;
  background: var(--bg-subtle);
  color: var(--text);
  text-decoration: none;
  transition: background 0.25s var(--ease-out-smooth), transform 0.25s var(--ease-out-smooth);
}
.bk-wall-item:hover { background: var(--bg); transform: translateY(-2px); }
.bk-logo {
  width: 30px;
  height: 30px;
  color: var(--text);
  opacity: 0.5;
  transition: opacity 0.25s var(--ease-out-smooth);
}
.bk-wall-item:hover .bk-logo { opacity: 1; }
.bk-logo svg { width: 100%; height: 100%; display: block; }
.bk-wall-name {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
  text-align: center;
  transition: color 0.25s var(--ease-out-smooth);
}
.bk-wall-item:hover .bk-wall-name { color: var(--text); }

/* Reveal stagger for wall tiles (only hidden once html.bk-anim is set) */
html.bk-anim .reveal .bk-wall-item { opacity: 0; }
html.bk-anim .reveal.visible .bk-wall-item { animation: bk-rise 0.5s var(--ease-out-gentle) forwards; }
.reveal.visible .bk-wall-item:nth-child(1) { animation-delay: 0.10s; }
.reveal.visible .bk-wall-item:nth-child(2) { animation-delay: 0.17s; }
.reveal.visible .bk-wall-item:nth-child(3) { animation-delay: 0.24s; }
.reveal.visible .bk-wall-item:nth-child(4) { animation-delay: 0.31s; }
.reveal.visible .bk-wall-item:nth-child(5) { animation-delay: 0.38s; }
.reveal.visible .bk-wall-item:nth-child(6) { animation-delay: 0.45s; }

@keyframes bk-rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Agent cards (hub: pick your tool) ---- */
.bk-agent-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--line);
}
.bk-agent-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  background: var(--bg-subtle);
  color: inherit;
  text-decoration: none;
  min-height: 9.5rem;
  transition: background 0.25s var(--ease-out-smooth);
}
.bk-agent-card:hover { background: var(--bg); }
.bk-agent-card .bk-logo { opacity: 0.85; width: 26px; height: 26px; }
.bk-agent-card:hover .bk-logo { opacity: 1; }
.bk-agent-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.bk-agent-tag { font-size: var(--small-size); color: var(--text-secondary); line-height: 1.5; }
.bk-agent-connect {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: var(--mono-size);
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap 0.2s var(--ease-out-smooth), color 0.2s var(--ease-out-smooth);
}
.bk-agent-card:hover .bk-agent-connect { color: var(--text); gap: 0.6rem; }

/* ---- One-click build cards ---- */
.bk-builds {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.bk-build-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.4rem;
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.bk-build-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.bk-build-desc { font-size: var(--small-size); color: var(--text-secondary); line-height: 1.55; flex: 1; }
.bk-build-actions { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; margin-top: 0.25rem; }

.bk-copy {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.95rem;
  font-family: var(--font-body);
  font-size: var(--small-size);
  font-weight: 500;
  border-radius: 4px;
  background: var(--text);
  color: var(--bg);
  border: 1px solid var(--text);
  cursor: pointer;
  transition: opacity 0.2s var(--ease-out-smooth), transform 0.2s var(--ease-out-smooth);
}
.bk-copy:hover { opacity: 0.85; transform: translateY(-1px); }
.bk-copy.copied { background: var(--bg); color: var(--text); }
.bk-copy svg { width: 14px; height: 14px; }

.bk-deeplink {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--small-size);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--text-tertiary);
  padding-bottom: 1px;
  transition: color 0.2s var(--ease-out-smooth), border-color 0.2s var(--ease-out-smooth);
}
.bk-deeplink:hover { color: var(--text); border-color: var(--text); }

html.bk-anim .reveal .bk-build-card { opacity: 0; }
html.bk-anim .reveal.visible .bk-build-card { animation: bk-rise 0.55s var(--ease-out-gentle) forwards; }
.reveal.visible .bk-build-card:nth-child(1) { animation-delay: 0.12s; }
.reveal.visible .bk-build-card:nth-child(2) { animation-delay: 0.20s; }
.reveal.visible .bk-build-card:nth-child(3) { animation-delay: 0.28s; }
.reveal.visible .bk-build-card:nth-child(4) { animation-delay: 0.36s; }
.reveal.visible .bk-build-card:nth-child(5) { animation-delay: 0.44s; }
.reveal.visible .bk-build-card:nth-child(6) { animation-delay: 0.52s; }
html.bk-anim .reveal .bk-agent-card { opacity: 0; }
html.bk-anim .reveal.visible .bk-agent-card { animation: bk-rise 0.5s var(--ease-out-gentle) forwards; }
.reveal.visible .bk-agent-card:nth-child(1) { animation-delay: 0.12s; }
.reveal.visible .bk-agent-card:nth-child(2) { animation-delay: 0.19s; }
.reveal.visible .bk-agent-card:nth-child(3) { animation-delay: 0.26s; }
.reveal.visible .bk-agent-card:nth-child(4) { animation-delay: 0.33s; }
.reveal.visible .bk-agent-card:nth-child(5) { animation-delay: 0.40s; }
.reveal.visible .bk-agent-card:nth-child(6) { animation-delay: 0.47s; }

/* ---- Build-time vs runtime spine ---- */
.bk-spine {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--line);
}
.bk-spine-col { background: var(--bg-subtle); padding: 1.6rem; }
.bk-spine-kicker {
  font-family: var(--font-mono);
  font-size: var(--mono-size);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 0.75rem;
}
.bk-spine-title { font-family: var(--font-display); font-size: 1.25rem; color: var(--text); margin-bottom: 0.75rem; letter-spacing: -0.01em; }
.bk-spine-row { display: flex; gap: 0.6rem; font-size: var(--small-size); line-height: 1.55; margin-bottom: 0.5rem; color: var(--text-secondary); }
.bk-spine-row b { color: var(--text); font-weight: 500; min-width: 6.5rem; display: inline-block; }
.bk-spine code {
  font-family: var(--font-mono);
  font-size: 0.78em;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 0.05rem 0.35rem;
}
.bk-spine-note {
  margin-top: 1.5rem;
  font-size: var(--small-size);
  color: var(--text-secondary);
  line-height: 1.6;
  display: flex;
  gap: 0.6rem;
}
.bk-spine-note b { color: var(--text); font-weight: 500; }

/* ---- Connect steps ---- */
.bk-steps { margin-top: 1.5rem; display: grid; gap: 1px; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--line); }
.bk-step { background: var(--bg-subtle); padding: 1.3rem 1.5rem; display: grid; grid-template-columns: 2.5rem minmax(0, 1fr); gap: 1rem; align-items: start; min-width: 0; }
.bk-step-body { min-width: 0; }
.bk-step-num { font-family: var(--font-mono); font-size: var(--mono-size); color: var(--text-tertiary); border: 1px solid var(--line-strong); border-radius: 50%; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.bk-step-body h3 { font-family: var(--font-display); font-size: 1.0625rem; color: var(--text); margin-bottom: 0.35rem; font-weight: 500; }
.bk-step-body p { font-size: var(--small-size); color: var(--text-secondary); line-height: 1.6; margin: 0; max-width: none; }
.bk-code {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.6;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  white-space: pre;
  color: var(--text);
}
.bk-kv { display: grid; grid-template-columns: auto 1fr; gap: 0.3rem 1rem; margin-top: 0.7rem; font-size: var(--small-size); }
.bk-kv dt { font-family: var(--font-mono); font-size: var(--mono-size); color: var(--text-tertiary); }
.bk-kv dd { color: var(--text); margin: 0; }
.bk-kv dd code { font-family: var(--font-mono); font-size: 0.85em; }

/* ---- FAQ (feeds FAQPage schema) ---- */
.bk-faq { margin-top: 1.5rem; border-top: 1px solid var(--line); }
.bk-faq details { border-bottom: 1px solid var(--line); padding: 0.25rem 0; }
.bk-faq summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 0;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.bk-faq summary::-webkit-details-marker { display: none; }
.bk-faq summary::after { content: "+"; font-family: var(--font-mono); color: var(--text-tertiary); transition: transform 0.2s var(--ease-out-smooth); }
.bk-faq details[open] summary::after { transform: rotate(45deg); }
.bk-faq details p { font-size: var(--small-size); color: var(--text-secondary); line-height: 1.65; padding: 0 0 1rem; margin: 0; max-width: 68ch; }

/* ---- Eyebrow / breadcrumb ---- */
.bk-eyebrow { font-family: var(--font-mono); font-size: var(--mono-size); letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-tertiary); margin-bottom: 1rem; }
.bk-eyebrow a { color: var(--text-tertiary); transition: color 0.2s var(--ease-out-smooth); }
.bk-eyebrow a:hover { color: var(--text); }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .bk-wall { grid-template-columns: repeat(3, 1fr); }
  .bk-agent-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .bk-builds { grid-template-columns: 1fr; }
  .bk-spine { grid-template-columns: 1fr; }
  .bk-step { grid-template-columns: 1.8rem 1fr; gap: 0.75rem; padding: 1.1rem; }
}
@media (max-width: 520px) {
  .bk-wall { grid-template-columns: repeat(2, 1fr); }
  .bk-agent-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal .bk-wall-item, .reveal .bk-build-card, .reveal .bk-agent-card {
    opacity: 1 !important; transform: none !important; animation: none !important;
  }
}