/* ==========================================================================
   ATLAS ANATOMIA BRASIL — Galeria de Anatomia Humana
   CSS organizado em metodologia BEM.
   Compatível com Elementor 4.2.0 (sem dependência de plugins extras).
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. TOKENS (design system)
   -------------------------------------------------------------------------- */
:root {
  --atlas-color-bg: #FFFFFF;
  --atlas-color-primary: #0B5ED7;
  --atlas-color-primary-hover: #2563EB;
  --atlas-color-text: #1F2937;
  --atlas-color-text-muted: #6B7280;
  --atlas-color-gray: #E5E7EB;
  --atlas-color-gray-light: #F9FAFB;
  --atlas-color-overlay: rgba(17, 24, 39, 0.96);

  --atlas-radius: 12px;
  --atlas-radius-sm: 8px;
  --atlas-radius-pill: 999px;

  --atlas-shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.06), 0 1px 3px rgba(17, 24, 39, 0.08);
  --atlas-shadow-md: 0 8px 24px rgba(17, 24, 39, 0.10);
  --atlas-shadow-lg: 0 20px 48px rgba(17, 24, 39, 0.22);

  --atlas-gap: 15px;
  --atlas-transition-fast: 180ms cubic-bezier(0.4, 0, 0.2, 1);
  --atlas-transition-base: 320ms cubic-bezier(0.16, 1, 0.3, 1);

  --atlas-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* --------------------------------------------------------------------------
   2. RESET LOCAL (escopado ao componente para não vazar no tema)
   -------------------------------------------------------------------------- */
.atlas-gallery,
.atlas-gallery *,
.atlas-gallery *::before,
.atlas-gallery *::after {
  box-sizing: border-box;
}

.atlas-gallery {
  background: var(--atlas-color-bg);
  color: var(--atlas-color-text);
  font-family: var(--atlas-font);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  padding-top: 1.5rem;
}

.atlas-gallery img {
  max-width: 100%;
  display: block;
}

.atlas-gallery button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

.atlas-gallery a {
  color: inherit;
  text-decoration: none;
}

.atlas-gallery ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (prefers-reduced-motion: reduce) {
  .atlas-gallery,
  .atlas-gallery * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Foco visível acessível em todos os elementos interativos */
.atlas-gallery a:focus-visible,
.atlas-gallery button:focus-visible,
.atlas-gallery input:focus-visible {
  outline: 3px solid var(--atlas-color-primary);
  outline-offset: 2px;
  border-radius: var(--atlas-radius-sm);
}

/* --------------------------------------------------------------------------
   4. LAYOUT DE DUAS COLUNAS (75% galerias / 25% menu)
   -------------------------------------------------------------------------- */
.atlas-gallery__layout {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(240px, 1fr);
  gap: 2.5rem;
  align-items: start;
}

.atlas-gallery__main {
  min-width: 0;
  order: 1;
}

.atlas-gallery__aside {
  order: 2;
}

/* --------------------------------------------------------------------------
   5. MENU LATERAL (Sistemas Anatômicos)
   -------------------------------------------------------------------------- */
.atlas-nav {
  position: sticky;
  top: 24px;
  z-index: 20;
  background: var(--atlas-color-gray-light);
  border: 1px solid var(--atlas-color-gray);
  border-radius: var(--atlas-radius);
  padding: 1.25rem;
  box-shadow: var(--atlas-shadow-sm);
}

.atlas-nav__title {
  margin: 0 0 0.75rem;
}

.atlas-nav__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--atlas-color-text);
  padding: 0.25rem 0;
}

.atlas-nav__chevron {
  width: 18px;
  height: 18px;
  transition: transform var(--atlas-transition-base);
  flex-shrink: 0;
}

.atlas-nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.atlas-nav__link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--atlas-radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--atlas-color-text);
  transition: background var(--atlas-transition-fast), color var(--atlas-transition-fast), transform var(--atlas-transition-fast);
}

.atlas-nav__icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--atlas-color-primary);
  transition: transform var(--atlas-transition-fast);
}

.atlas-nav__count {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--atlas-color-text-muted);
  font-weight: 400;
}

.atlas-nav__link:hover {
  background: #EFF4FF;
  color: var(--atlas-color-primary);
  transform: translateX(2px);
}

.atlas-nav__link:hover .atlas-nav__icon {
  transform: scale(1.1);
}

/* Item ativo — destacado via ScrollSpy (Intersection Observer) */
.atlas-nav__link.atlas-nav__link--active {
  background: var(--atlas-color-primary);
  color: #FFFFFF;
  box-shadow: var(--atlas-shadow-sm);
}

.atlas-nav__link.atlas-nav__link--active .atlas-nav__icon,
.atlas-nav__link.atlas-nav__link--active .atlas-nav__count {
  color: #FFFFFF;
}

/* --------------------------------------------------------------------------
   6. GALERIAS POR SISTEMA
   -------------------------------------------------------------------------- */
.atlas-system {
  scroll-margin-top: 24px;
  padding-bottom: 3rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--atlas-color-gray);

  /* Fade-up ao entrar na viewport (ativado via JS/IntersectionObserver) */
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 640ms ease, transform 640ms ease;
}

.atlas-system:last-child {
  border-bottom: 0;
}

.atlas-system.atlas-system--visible {
  opacity: 1;
  transform: translateY(0);
}

.atlas-system__header {
  margin-bottom: 1.25rem;
}

.atlas-system__title {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
}

.atlas-system__count {
  font-size: 1rem;
  font-weight: 500;
  color: var(--atlas-color-text-muted);
}

.atlas-system__description {
  margin: 0;
  color: var(--atlas-color-text-muted);
  max-width: 640px;
}

/* Grid responsivo de miniaturas: 4 colunas (desktop/notebook) */
.atlas-system__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--atlas-gap);
}

/* --------------------------------------------------------------------------
   7. MINIATURAS
   -------------------------------------------------------------------------- */
.atlas-thumb {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--atlas-radius);
  overflow: hidden;
  background: var(--atlas-color-gray-light);
  box-shadow: var(--atlas-shadow-sm);
  transition: box-shadow var(--atlas-transition-base), transform var(--atlas-transition-base);
}

.atlas-thumb:hover,
.atlas-thumb:focus-visible {
  box-shadow: var(--atlas-shadow-md);
  transform: translateY(-2px);
}

.atlas-thumb__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--atlas-transition-base);
}

.atlas-thumb:hover .atlas-thumb__image,
.atlas-thumb:focus-visible .atlas-thumb__image {
  transform: scale(1.06);
}

.atlas-thumb__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 0.65rem;
  background: linear-gradient(180deg, rgba(17, 24, 39, 0) 55%, rgba(17, 24, 39, 0.72) 100%);
  opacity: 0;
  transition: opacity var(--atlas-transition-fast);
}

.atlas-thumb:hover .atlas-thumb__overlay,
.atlas-thumb:focus-visible .atlas-thumb__overlay {
  opacity: 1;
}

.atlas-thumb__caption {
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.3;
}

.atlas-thumb__zoom-hint {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: var(--atlas-color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.85);
  transition: opacity var(--atlas-transition-fast), transform var(--atlas-transition-fast);
}

.atlas-thumb:hover .atlas-thumb__zoom-hint,
.atlas-thumb:focus-visible .atlas-thumb__zoom-hint {
  opacity: 1;
  transform: scale(1);
}

.atlas-thumb__zoom-hint svg {
  width: 16px;
  height: 16px;
}

/* Miniatura oculta pela busca */
.atlas-thumb[hidden] {
  display: none;
}

/* --------------------------------------------------------------------------
   8. BOTÃO VOLTAR AO TOPO
   -------------------------------------------------------------------------- */
.atlas-back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--atlas-color-primary);
  color: #FFFFFF;
  border-radius: 50%;
  box-shadow: var(--atlas-shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--atlas-transition-base), transform var(--atlas-transition-base), background var(--atlas-transition-fast), visibility var(--atlas-transition-base);
  z-index: 40;
}

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

.atlas-back-to-top:hover {
  background: var(--atlas-color-primary-hover);
}

.atlas-back-to-top svg {
  width: 22px;
  height: 22px;
}

/* --------------------------------------------------------------------------
   9. LIGHTBOX
   -------------------------------------------------------------------------- */
.atlas-lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
}

.atlas-lightbox.atlas-lightbox--open {
  display: block;
}

.atlas-lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: var(--atlas-color-overlay);
  opacity: 0;
  transition: opacity var(--atlas-transition-base);
}

.atlas-lightbox--visible .atlas-lightbox__backdrop {
  opacity: 1;
}

.atlas-lightbox__dialog {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.25rem;
  opacity: 0;
  transform: scale(0.96);
  transition: opacity var(--atlas-transition-base), transform var(--atlas-transition-base);
}

.atlas-lightbox--visible .atlas-lightbox__dialog {
  opacity: 1;
  transform: scale(1);
}

.atlas-lightbox__topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #F9FAFB;
  flex-shrink: 0;
  margin-bottom: 0.75rem;
}

.atlas-lightbox__counter {
  font-size: 0.9rem;
  font-weight: 500;
  color: #E5E7EB;
}

.atlas-lightbox__actions {
  display: flex;
  gap: 0.5rem;
}

.atlas-lightbox__btn {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: #F9FAFB;
  background: rgba(255, 255, 255, 0.08);
  transition: background var(--atlas-transition-fast), color var(--atlas-transition-fast);
}

.atlas-lightbox__btn:hover {
  background: rgba(255, 255, 255, 0.18);
}

.atlas-lightbox__btn.atlas-lightbox__btn--active {
  background: var(--atlas-color-primary);
  color: #FFFFFF;
}

.atlas-lightbox__btn svg {
  width: 20px;
  height: 20px;
}

.atlas-lightbox__stage {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  overflow: hidden;
  touch-action: pan-y;
}

.atlas-lightbox__nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--atlas-transition-fast);
  z-index: 2;
}

.atlas-lightbox__nav-btn:hover {
  background: rgba(255, 255, 255, 0.22);
}

.atlas-lightbox__nav-btn--prev { left: 0.5rem; }
.atlas-lightbox__nav-btn--next { right: 0.5rem; }

.atlas-lightbox__nav-btn svg {
  width: 26px;
  height: 26px;
}

.atlas-lightbox__figure {
  max-width: 100%;
  max-height: 100%;
  overflow: hidden;
  cursor: zoom-in;
  touch-action: none;
}

.atlas-lightbox__figure--zoomed {
  cursor: grab;
}

.atlas-lightbox__figure--panning {
  cursor: grabbing;
}

.atlas-lightbox__image {
  max-width: 100%;
  max-height: 78vh;
  width: auto;
  height: auto;
  margin: 0 auto;
  border-radius: var(--atlas-radius-sm);
  transform-origin: center center;
  transition: transform var(--atlas-transition-base);
  user-select: none;
  -webkit-user-drag: none;
}

.atlas-lightbox__image--zoomed {
  transform: scale(2);
  transition: none;
}

.atlas-lightbox__caption {
  flex-shrink: 0;
  text-align: center;
  color: #F3F4F6;
  font-size: 0.95rem;
  margin: 0.85rem 0;
}

.atlas-lightbox__thumbs {
  flex-shrink: 0;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.25rem 0 0.5rem;
  scrollbar-width: thin;
}

.atlas-lightbox__thumb {
  flex: 0 0 auto;
  width: 56px;
  height: 56px;
  border-radius: var(--atlas-radius-sm);
  overflow: hidden;
  opacity: 0.5;
  border: 2px solid transparent;
  transition: opacity var(--atlas-transition-fast), border-color var(--atlas-transition-fast);
}

.atlas-lightbox__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.atlas-lightbox__thumb:hover {
  opacity: 0.85;
}

.atlas-lightbox__thumb--active {
  opacity: 1;
  border-color: var(--atlas-color-primary);
}

/* --------------------------------------------------------------------------
   10. RESPONSIVIDADE
   -------------------------------------------------------------------------- */

/* Notebook: mantém 4 colunas (>=1280px cobre desktop e notebook) */
@media (max-width: 1280px) {
  .atlas-gallery__layout {
    gap: 2rem;
  }
}

/* Tablet: menu passa para cima das galerias, grid em 3 colunas */
@media (max-width: 1024px) {
  .atlas-gallery__layout {
    grid-template-columns: 1fr;
  }

  .atlas-gallery__aside {
    order: 0;
  }

  .atlas-gallery__main {
    order: 1;
  }

  /* Menu permanece sticky (sempre à vista) também no tablet/mobile,
     apenas movido para cima das galerias pelo layout em coluna única. */
  .atlas-nav {
    top: 12px;
  }

  .atlas-system__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Celular: grid em 2 colunas + menu em accordion */
@media (max-width: 640px) {
  .atlas-system__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .atlas-nav__toggle {
    cursor: pointer;
  }

  .atlas-nav__list {
    display: grid;
    grid-template-rows: 0fr;
    overflow: hidden;
    transition: grid-template-rows var(--atlas-transition-base);
  }

  .atlas-nav__list > * {
    overflow: hidden;
  }

  .atlas-nav__list.atlas-nav__list--open {
    grid-template-rows: 1fr;
  }

  .atlas-nav__list-inner {
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
  }

  .atlas-nav[data-collapsed="true"] .atlas-nav__chevron {
    transform: rotate(-90deg);
  }

  .atlas-lightbox__nav-btn {
    width: 40px;
    height: 40px;
  }

  .atlas-lightbox__thumbs {
    display: none;
  }

  .atlas-back-to-top {
    right: 16px;
    bottom: 16px;
  }
}