/* ===== Buy Now → BigBattery — shared styles (beta56 / 2026-06-19) =====
 * Loaded alongside buy-now-bb.js by index.html, calculator.html, my-spec.html.
 * Self-contained — no other selectors collide.
 */

.ftb-buy-bb {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  width: 100%; margin-top: 1rem;
  background: #1a202c; color: #fff; border: 2px solid #1a202c;
  border-radius: 8px; padding: 0.85rem 1.2rem;
  font-family: 'Cabinet Grotesk', -apple-system, sans-serif;
  font-weight: 700; font-size: 1rem; cursor: pointer;
  transition: all .15s ease;
  text-decoration: none;
  flex-direction: row;
  flex-wrap: wrap;
}
.ftb-buy-bb:hover, .ftb-buy-bb:focus {
  background: #FF6B35; border-color: #FF6B35; color: #fff;
  transform: translateY(-1px); box-shadow: 0 6px 20px rgba(255,107,53,0.3);
}
.ftb-buy-bb .ftb-buy-bb-sub {
  font-size: 0.72rem; font-weight: 500; opacity: 0.85;
  display: block; margin-top: 2px; letter-spacing: 0.02em;
  width: 100%;
}
.ftb-buy-bb-note {
  text-align: center; font-size: 0.78rem; color: #64748b;
  margin: 0.5rem 0 0; line-height: 1.4;
}
.ftb-buy-bb-note code,
.ftb-buy-block code {
  background: #fef3c7; color: #92400e; padding: 1px 6px;
  border-radius: 3px; font-weight: 700; font-size: 0.82rem;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
}

#ftb-bb-coupon-banner {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: #1a202c; color: #fff; border-left: 4px solid #FF6B35;
  padding: 14px 18px; border-radius: 10px;
  box-shadow: 0 16px 48px rgba(0,0,0,0.35);
  max-width: 520px; width: calc(100% - 2rem); z-index: 10000;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  animation: ftbBBSlideUp 0.35s ease-out;
}
@keyframes ftbBBSlideUp {
  from { opacity: 0; transform: translate(-50%, 20px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}
#ftb-bb-coupon-banner.ftb-bb-fade { opacity: 0; transition: opacity 0.5s ease; }
.ftb-bb-coupon-inner { display: flex; align-items: center; gap: 0.75rem; }
.ftb-bb-coupon-text { flex: 1; font-size: 0.92rem; line-height: 1.45; }
.ftb-bb-coupon-text code {
  background: #FF6B35; color: #fff; padding: 2px 8px; border-radius: 4px;
  font-weight: 700; font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.9rem; letter-spacing: 0.04em;
}
.ftb-bb-coupon-text .ftb-bb-kit { color: #FF6B35; font-weight: 600; }
.ftb-bb-copy-btn {
  background: #FF6B35; color: #fff; border: none; border-radius: 6px;
  padding: 0.5rem 0.85rem; font-weight: 700; font-size: 0.85rem;
  cursor: pointer; white-space: nowrap;
  transition: background 0.15s ease;
}
.ftb-bb-copy-btn:hover { background: #e85a23; }
.ftb-bb-close-btn {
  background: transparent; border: none; color: #94a3b8;
  font-size: 1.4rem; line-height: 1; cursor: pointer;
  padding: 0 4px; flex-shrink: 0;
}
.ftb-bb-close-btn:hover { color: #fff; }

@media (max-width: 600px) {
  #ftb-bb-coupon-banner { bottom: 12px; padding: 12px 14px; }
  .ftb-bb-coupon-inner { flex-wrap: wrap; }
  .ftb-bb-coupon-text { width: 100%; font-size: 0.88rem; }
  .ftb-bb-copy-btn { font-size: 0.82rem; padding: 0.45rem 0.75rem; }
}