/* ============================================================
   A2: Luxury Footer Component
   Baan Khanitha Website Redesign
   ============================================================ */

.site-footer {
  background: linear-gradient(180deg, #181B42 0%, #101330 100%);
  color: #E2E6F0;
  position: relative;
  overflow: hidden;
  border-top: 3px solid var(--color-gold);
  font-family: var(--font-thai);
  padding-top: 70px;
}

/* Subtle Thai Motif Watermark in Background */
.site-footer::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(212, 140, 43, 0.08) 0%, rgba(212, 140, 43, 0) 70%);
  pointer-events: none;
}

.site-footer::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 5%;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(212, 140, 43, 0.05) 0%, rgba(212, 140, 43, 0) 70%);
  pointer-events: none;
}

/* Footer Main Grid */
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.3fr 1.3fr;
  gap: 40px;
  position: relative;
  z-index: 1;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Brand Column */
.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-logo {
  height: 68px;
  width: auto;
  margin-bottom: 16px;
  filter: brightness(0) invert(1); /* Crisp White Vector Logo in dark footer */
}

.footer-brand-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #B5BDD0;
  margin-bottom: 22px;
  font-weight: 300;
}

.footer-social-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  transition: all var(--transition-fast);
}

.footer-social-btn svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
}

.footer-social-btn:hover {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: #FFFFFF;
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(212, 140, 43, 0.35);
}

/* Footer Column Headings */
.footer-col-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
  position: relative;
  display: inline-block;
  padding-bottom: 8px;
}

.footer-col-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background-color: var(--color-gold);
}

/* Footer Navigation Links */
.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-link {
  font-size: 0.95rem;
  color: #C0C8DA;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-nav-link::before {
  content: '›';
  color: var(--color-gold);
  font-size: 1.1rem;
  line-height: 1;
  transition: transform var(--transition-fast);
}

.footer-nav-link:hover {
  color: #FFFFFF;
  transform: translateX(4px);
}

.footer-nav-link:hover::before {
  transform: translateX(2px);
}

/* Branch List Column */
.footer-branch-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-branch-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.footer-branch-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: #FFFFFF;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
}

.footer-branch-name:hover {
  color: var(--color-gold);
}

.footer-branch-detail {
  font-size: 0.82rem;
  color: #9AA4BE;
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-branch-badge {
  display: inline-block;
  font-size: 0.68rem;
  padding: 1px 6px;
  border-radius: 3px;
  background: rgba(212, 140, 43, 0.2);
  color: var(--color-gold);
  border: 1px solid rgba(212, 140, 43, 0.3);
  font-family: var(--font-thai);
  font-weight: 500;
}

/* Contact / Reservation Column */
.footer-contact-block {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-contact-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

.footer-callcenter-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  font-weight: 600;
  margin-bottom: 4px;
}

.footer-callcenter-number {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: #FFFFFF;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color var(--transition-fast);
}

.footer-callcenter-number:hover {
  color: var(--color-gold);
}

.footer-callcenter-number svg {
  width: 18px;
  height: 18px;
  fill: var(--color-gold);
}

.footer-hours-note {
  font-size: 0.8rem;
  color: #9AA4BE;
  margin-top: 4px;
}

.footer-book-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--color-gold);
  color: #121C2E;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(212, 140, 43, 0.3);
  transition: all var(--transition-smooth);
}

.footer-book-btn:hover {
  background: #E5A953;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(212, 140, 43, 0.45);
}

/* Bottom Copyright Bar */
.footer-bottom {
  padding: 24px 0;
  position: relative;
  z-index: 1;
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #8C96AF;
}

.footer-legal-links {
  display: flex;
  gap: 20px;
}

.footer-legal-link {
  color: #8C96AF;
  transition: color var(--transition-fast);
}

.footer-legal-link:hover {
  color: #FFFFFF;
}

/* Back to Top Floating Button */
.back-to-top-btn {
  position: fixed;
  bottom: 80px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #181B42;
  color: #FFFFFF;
  border: 1px solid rgba(212, 140, 43, 0.4);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition-smooth);
  z-index: 990;
}

.back-to-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top-btn:hover {
  background: var(--color-gold);
  color: #121C2E;
  border-color: var(--color-gold);
  transform: translateY(-3px);
}

.back-to-top-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Responsive Footer Queries */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 640px) {
  .site-footer {
    padding-top: 50px;
    padding-bottom: 70px; /* Space for mobile sticky action bar */
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 36px;
  }

  .footer-bottom .container {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .back-to-top-btn {
    bottom: 90px;
    right: 16px;
    width: 38px;
    height: 38px;
  }
}