/* ═══════════════════════════════════════════════════════
   SONVERA — Shared Footer Styles
   Loaded by every page via <link rel="stylesheet" href="assets/footer.css">.
   Design tokens (:root) come from each page's inline <style>.
   ═══════════════════════════════════════════════════════ */

.footer {
  background: var(--c-footer-bg);
  color: var(--c-text-muted-dark);
  padding: clamp(3.5rem, 7vw, 5.5rem) clamp(2rem, 5vw, 5rem) 0;
}

.footer__top {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: clamp(2.5rem, 5vw, 4rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

/* ── Brand block ── */
.footer__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.footer__logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.footer__logo .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 14px var(--c-accent);
}
.footer__tagline {
  font-size: 0.9rem;
  color: var(--c-text-muted-dark);
  line-height: 1.7;
  max-width: 280px;
}

/* ── Social QR cards ── */
.footer__social {
  display: flex;
  justify-content: center;
  gap: clamp(1rem, 2.5vw, 1.75rem);
  margin-top: 2rem;
}
.footer__social-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
}
.footer__social-qr {
  width: 104px;
  height: 104px;
  background: #fff;
  border-radius: 14px;
  padding: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 12px 32px rgba(0,0,0,0.4);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.footer__social-qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 6px;
}
.footer__social-card:hover .footer__social-qr {
  transform: translateY(-4px);
  border-color: var(--c-accent);
  box-shadow: 0 18px 44px rgba(0,0,0,0.55);
}
.footer__social-name {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-muted-dark);
  transition: color var(--transition-fast);
}
.footer__social-card:hover .footer__social-name { color: var(--c-accent); }

/* ── Link columns ── */
.footer__cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  text-align: center;
}
.footer__cols h4 {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin-bottom: 1.1rem;
}
.footer__cols a,
.footer__cols span {
  display: block;
  font-size: 0.9rem;
  color: var(--c-text-muted-dark);
  text-decoration: none;
  padding: 0.32rem 0;
  line-height: 1.6;
  transition: color var(--transition-fast);
}
.footer__cols a:hover { color: var(--c-accent); }

/* ── Bottom bar ── */
.footer__bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.4rem 0 1.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer__bottom p {
  font-size: 0.78rem;
  color: #6f6f6f;
  letter-spacing: 0.02em;
}
.footer__beian {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: #6f6f6f;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
}
.footer__beian img {
  width: 14px;
  height: 16px;
  display: block;
  flex: none;
}
.footer__beian:hover { color: var(--c-accent); }
.footer__back {
  font-size: 0.78rem;
  color: #6f6f6f;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
}
.footer__back::after { content: '↑'; font-size: 0.85rem; line-height: 1; }
.footer__back:hover { color: var(--c-accent); }

/* ── Responsive ── */
@media (max-width: 960px) {
  .footer__top { gap: 2.5rem; }
}
@media (max-width: 768px) {
  .footer__top { flex-direction: column; align-items: center; gap: 2.5rem; padding-bottom: 2.5rem; }
  .footer__social { margin-top: 1.5rem; }
  .footer__tagline { max-width: 320px; }
}
@media (max-width: 480px) {
  .footer__cols { grid-template-columns: 1fr; gap: 2rem; }
  .footer__social { gap: 0.9rem; }
  .footer__social-qr { width: 88px; height: 88px; padding: 7px; }
}