/* ==========================================================================
   RESPONSIVE DESIGN & MOBILE OPTIMIZATIONS (Production Polish)
   ========================================================================== */

/* Mobile Nav Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 420px;
  height: 100vh;
  height: 100dvh;
  background-color: var(--bg-primary);
  border-left: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-drawer);
  z-index: 1050;
  padding: calc(var(--header-height) + 1.5rem) 2.5rem 3rem 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: translateX(100%);
  visibility: hidden;
  pointer-events: none;
  transition: transform var(--transition-smooth), visibility 0s linear 0.45s;
}

.mobile-nav-drawer.is-open {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
  transition: transform var(--transition-smooth), visibility 0s linear 0s;
}

.mobile-nav-close {
  position: absolute;
  top: 1.15rem;
  right: 1.25rem;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.5rem;
  color: var(--text-main);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.mobile-nav-close::after {
  content: '';
  position: absolute;
  right: 0.5rem;
  bottom: 0.25rem;
  left: 0.5rem;
  height: 1px;
  background-color: var(--text-main);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}

.mobile-nav-close:hover::after,
.mobile-nav-close:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.mobile-nav-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(22, 22, 20, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1040;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-smooth), visibility var(--transition-smooth);
}

.mobile-nav-backdrop.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.mobile-nav-link {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 400;
  color: var(--text-main);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-nav-link span {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-olive);
  letter-spacing: 0.1em;
}

.mobile-nav-link:hover,
.mobile-nav-link:focus-visible {
  color: var(--accent-olive);
  transform: translateX(6px);
}

.mobile-drawer-footer {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
}

.mobile-drawer-contact {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Compact desktop header before the navigation collapses */
@media (max-width: 1240px) {
  .header-container {
    gap: 1.25rem;
  }

  .nav-desktop {
    gap: 1.1rem;
  }

  .nav-link {
    font-size: 0.8125rem;
  }

  .btn-header-cta {
    padding-inline: 1rem;
  }
}

/* --------------------------------------------------------------------------
   BREAKPOINT: Large Tablets & Laptops (<= 1120px)
   -------------------------------------------------------------------------- */
@media (max-width: 1120px) {
  :root {
    --header-height: 76px;
    --header-height-scrolled: 64px;
  }

  .nav-desktop {
    display: none;
  }

  .btn-nav-toggle {
    display: flex;
  }

  /* Hero */
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 3.5rem;
  }

  .hero-media {
    max-width: 640px;
  }

  /* Philosophy */
  .philosophy-pillars {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.5rem;
  }

  /* Feature DSD */
  .feature-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 3.5rem;
  }

  /* Doctor */
  .doctor-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 3.5rem;
  }

  .doctor-media {
    max-width: 480px;
  }

  /* Gallery */
  .clinic-gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .gallery-item-1 { grid-column: span 2; aspect-ratio: 16 / 9; }
  .gallery-item-2 { grid-column: span 1; aspect-ratio: 1 / 1; }
  .gallery-item-3 { grid-column: span 1; aspect-ratio: 1 / 1; }
  .gallery-item-4 { grid-column: span 2; aspect-ratio: 16 / 9; }

  /* Testimonials */
  .testimonials-editorial-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }

  /* Appointment */
  .appointment-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 3.5rem;
  }

  /* Footer */
  .footer-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.5rem;
  }
}

/* --------------------------------------------------------------------------
   BREAKPOINT: Tablets & Mobile Devices (<= 768px)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .header-actions .btn-header-cta {
    display: none;
  }

  /* Treatments header */
  .treatments-header {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
  }

  .clinic-header {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
  }

  /* Service Index Mobile Adaptations */
  .service-row {
    grid-template-columns: 40px minmax(0, 1fr) 36px;
    grid-template-areas:
      "num name arrow"
      ". desc .";
    gap: 0.5rem 0.75rem;
    padding: 1.5rem 0;
  }

  .service-num {
    grid-area: num;
  }

  .service-name {
    grid-area: name;
    font-size: 1.35rem;
  }

  .service-desc {
    grid-area: desc;
    font-size: 0.875rem;
    padding-right: 0;
  }

  .service-action {
    grid-area: arrow;
  }

  .service-arrow {
    width: 32px;
    height: 32px;
  }

  .service-arrow svg {
    width: 14px;
    height: 14px;
  }

  /* Form */
  .form-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .booking-card {
    padding: 1.75rem 1.25rem;
  }

  /* Doctor Credentials */
  .doctor-credentials-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
  }

  /* Mobile Sticky Bottom Action Bar */
  .mobile-bottom-bar {
    display: block;
    padding-bottom: calc(0.85rem + env(safe-area-inset-bottom, 0px));
  }

  body {
    padding-bottom: 74px;
  }

  /* Footer */
  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.25rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }

  .footer-legal-links {
    flex-wrap: wrap;
    gap: 1rem;
  }
}

/* --------------------------------------------------------------------------
   BREAKPOINT: Small Mobile Screens (<= 480px / 375px / 320px)
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  .gallery-item-1,
  .gallery-item-2,
  .gallery-item-3,
  .gallery-item-4 {
    grid-column: span 2;
    aspect-ratio: 4 / 3;
  }

  .ba-meta-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .mobile-nav-drawer {
    max-width: 100%;
    padding: calc(var(--header-height) + 1rem) 1.5rem 2.5rem 1.5rem;
  }

  .mobile-nav-link {
    font-size: 1.6rem;
  }
}