/* Concept styles: reuse the site's design tokens so it feels native. */
:root {
  --bf-bg: hsl(var(--primary));
  --bf-fg: hsl(var(--primary-foreground));
  --bf-line: hsl(var(--primary-foreground) / 0.18);
  --bf-dim: hsl(var(--primary-foreground) / 0.6);
}

html.bf-lock, html.bf-lock body { overflow: hidden; }

#bf-overlay[hidden] { display: none; }
#bf-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: var(--bf-bg); color: var(--bf-fg);
  font-family: "DM Sans", system-ui, sans-serif;
  animation: bf-in 0.28s ease both;
}
@keyframes bf-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.bf-shell { height: 100%; display: flex; flex-direction: column; max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.bf-top { display: flex; align-items: center; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--bf-line); }
.bf-brand { font-size: 14px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--bf-dim); }
.bf-progress { display: flex; gap: 6px; flex: 1; max-width: 220px; }
.bf-seg { flex: 1; height: 2px; background: var(--bf-line); transition: background 0.3s; }
.bf-seg.is-done { background: var(--bf-fg); }
.bf-seg.is-current { background: hsl(var(--primary-foreground) / 0.55); }
.bf-close { margin-left: auto; font-size: 30px; line-height: 1; background: none; border: 0; color: var(--bf-fg); cursor: pointer; padding: 4px 8px; opacity: 0.75; }
.bf-close:hover { opacity: 1; }

.bf-body { flex: 1; min-height: 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 56px; padding-top: 36px; }
.bf-left { min-height: 0; overflow-y: auto; padding-bottom: 40px; }
.bf-right { min-height: 0; overflow-y: auto; padding-bottom: 0; }
.bf-right { border-left: 1px solid var(--bf-line); padding-left: 48px; padding-right: 20px; scrollbar-gutter: stable; }
.bf-plus { margin: -6px 0 14px; }
.bf-sub { display: flex; align-items: baseline; gap: 10px; font-size: 12px; font-weight: 400; letter-spacing: 0.14em; text-transform: uppercase; color: var(--bf-dim); margin: 34px 0 4px; }
.bf-sub span { font-variant-numeric: tabular-nums; opacity: 0.7; }

.bf-eyebrow { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--bf-dim); margin: 0 0 14px; }
.bf-q { font-size: clamp(30px, 4vw, 48px); font-weight: 300; letter-spacing: -0.02em; line-height: 1.1; margin: 0 0 30px; }

.bf-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 10px; }
.bf-opt {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px; text-align: left;
  padding: 16px 18px; background: transparent; color: var(--bf-fg); cursor: pointer;
  border: 1px solid var(--bf-line); font: inherit; font-size: 15px;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}
.bf-opt:hover:not(:disabled) { border-color: var(--bf-fg); transform: translateY(-1px); }
.bf-opt.is-active { background: var(--bf-fg); color: var(--bf-bg); border-color: var(--bf-fg); }
.bf-opt:disabled { opacity: 0.3; cursor: not-allowed; }
.bf-opt-count { font-size: 13px; opacity: 0.6; font-variant-numeric: tabular-nums; }

.bf-check { display: flex; align-items: center; gap: 10px; margin-top: 22px; font-size: 14px; color: var(--bf-dim); cursor: pointer; }
.bf-check input { accent-color: hsl(var(--primary-foreground)); width: 16px; height: 16px; }
.bf-note { font-size: 13px; line-height: 1.6; color: var(--bf-dim); margin: 14px 0 0; }

.bf-nav { display: flex; justify-content: space-between; margin-top: 34px; }
.bf-link { background: none; border: 0; padding: 4px 0; font: inherit; font-size: 14px; letter-spacing: 0.02em; color: var(--bf-dim); cursor: pointer; }
.bf-link:hover { color: var(--bf-fg); }

.bf-count-line { font-size: 22px; font-weight: 300; margin: 0 0 14px; }
.bf-count { font-size: 56px; font-weight: 300; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; margin-right: 6px; }
.bf-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.bf-chip { font-size: 12px; letter-spacing: 0.03em; padding: 5px 10px; border: 1px solid var(--bf-line); color: var(--bf-dim); }
.bf-result-head { margin-bottom: 6px; }

.bf-cards { display: flex; flex-direction: column; }
.bf-card { display: flex; justify-content: space-between; gap: 20px; padding: 18px 0; border-top: 1px solid var(--bf-line); animation: bf-card 0.32s ease both; }
@keyframes bf-card { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.bf-card h3 { font-size: 17px; font-weight: 400; margin: 0 0 6px; line-height: 1.35; }
.bf-specs { font-size: 13px; color: var(--bf-dim); margin: 0 0 8px; }
.bf-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 0; font-size: 12px; color: var(--bf-dim); }
.bf-pill { padding: 2px 8px; border: 1px solid var(--bf-line); }
.bf-card-side { display: flex; flex-direction: column; align-items: flex-end; justify-content: space-between; gap: 10px; flex-shrink: 0; }
.bf-card-side strong { font-size: 15px; font-weight: 600; white-space: nowrap; }
.bf-enq { font-size: 13px; letter-spacing: 0.03em; padding: 7px 14px; border: 1px solid var(--bf-line); color: var(--bf-fg); text-decoration: none; transition: background 0.2s, color 0.2s; }
.bf-enq:hover { background: var(--bf-fg); color: var(--bf-bg); }

.bf-empty { padding: 36px 0; border-top: 1px solid var(--bf-line); color: var(--bf-dim); }

.bf-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 26px; padding: 22px 0 28px; margin-top: 8px; border-top: 1px solid var(--bf-line); position: sticky; bottom: 0; background: var(--bf-bg); }
.bf-cta-primary { background: var(--bf-fg); color: var(--bf-bg); padding: 13px 24px; font-size: 14px; letter-spacing: 0.03em; text-decoration: none; }
.bf-cta-primary:hover { opacity: 0.9; }
.bf-cta-secondary { font-size: 14px; color: var(--bf-dim); text-decoration: none; }
.bf-cta-secondary:hover { color: var(--bf-fg); }

/* Entry points */
.bf-hero-btn, .bf-launcher {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font: inherit;
  font-size: 14px; letter-spacing: 0.02em; transition: background 0.3s, color 0.3s, transform 0.3s;
}
.bf-hero-btn {
  padding: 16px 28px; color: hsl(var(--foreground)); background: transparent;
  border: 1px solid hsl(var(--foreground) / 0.35);
}
.bf-hero-btn:hover { background: hsl(var(--foreground)); color: hsl(var(--background)); }
.bf-launcher {
  position: fixed; left: 24px; bottom: 24px; z-index: 45; padding: 12px 20px;
  color: hsl(var(--background)); background: hsl(var(--foreground)); border: 0; box-shadow: 0 10px 30px rgba(10, 20, 40, 0.28);
}
.bf-launcher:hover { transform: translateY(-2px); }
.bf-cleanroom-tag {
  position: fixed; left: 50%; bottom: 6px; transform: translateX(-50%); z-index: 44;
  font: 11px/1 "DM Sans", system-ui, sans-serif; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 5px 10px; color: hsl(var(--background)); background: hsl(var(--foreground) / 0.72); pointer-events: none; white-space: nowrap;
}
html.bf-lock .bf-launcher, html.bf-lock .bf-cleanroom-tag { display: none; }

@media (max-width: 900px) {
  .bf-shell { padding: 0 16px; overflow-y: auto; }
  .bf-body { display: block; padding-top: 24px; }
  .bf-left, .bf-right { overflow: visible; padding-bottom: 24px; }
  .bf-right { border-left: 0; border-top: 1px solid var(--bf-line); padding-left: 0; padding-top: 28px; }
  .bf-cta { position: static; }
  .bf-grid { grid-template-columns: 1fr 1fr; }
  .bf-launcher { left: 16px; bottom: 16px; }
  .bf-cleanroom-tag { display: none; }
}