/* ============================================================
   Mundo Felino - Estilos personalizados
   - Dark mode con variables CSS
   - Lightbox para galeria
   - Animaciones de scroll
   - Boton "ir arriba"
   - Skip links accesibles
   ============================================================ */

/* ----------- Variables del tema (claro por defecto, NUNCA blanco puro) ----------- */
:root {
  --bg-color: #d8dee9;          /* body: gris-azul medio, mas oscuro para que cards destaquen */
  --bg-elevated: #fafbfd;       /* card/modal: blanco-roto muy suave (NO blanco puro) */
  --bg-section: #c8d1de;        /* secciones alternas: aun mas oscuro que body */
  --text-color: #1f2937;
  --text-muted: #5b6473;
  --border-color: #4a5568;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --highlight-bg: #fff3cd;
  --card-shadow: 0 4px 14px rgba(31, 41, 55, 0.12), 0 1px 3px rgba(31, 41, 55, 0.06);
  --transition: 0.3s ease;
}

/* ----------- Variables del tema oscuro ----------- */
[data-theme="dark"] {
  --bg-color: #0f172a;
  --bg-elevated: #1e293b;
  --bg-section: #172033;
  --text-color: #e2e8f0;
  --text-muted: #94a3b8;
  --border-color: #475569;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --highlight-bg: #facc15;
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

/* ----------- Aplicacion del tema (afecta a TODOS los fondos) ----------- */
body {
  background-color: var(--bg-color) !important;
  color: var(--text-color);
  transition: background-color var(--transition), color var(--transition);
}

/* Fondos blancos de Bootstrap forzados a la paleta */
.bg-white,
.bg-body {
  background-color: var(--bg-elevated) !important;
  color: var(--text-color);
}

/* Secciones con .bg-light (Bootstrap) usan el tono "section" */
.bg-light,
.hero-section,
.keywords-section,
.tutorial-section,
.donation-box,
.fact-card,
.newsletter-form,
.footer-section {
  background-color: var(--bg-section) !important;
  color: var(--text-color);
}

/* Cards, modales y acordeones usan el "elevated" suave + sombra para destacar */
.card,
.accordion-item,
.modal-content,
.contact-form-container,
.fact-card,
.donation-box,
.tutorial-section,
.keywords-section,
.newsletter-form {
  background-color: var(--bg-elevated) !important;
  color: var(--text-color);
  border-color: var(--border-color);
  box-shadow: var(--card-shadow);
}

/* Hover sutil en cards para sensacion de profundidad */
.card:hover,
.fact-card:hover {
  box-shadow: 0 8px 22px rgba(31, 41, 55, 0.15), 0 2px 6px rgba(31, 41, 55, 0.08);
}

/* Modo oscuro: sombras mas sutiles (no se notan tanto sobre fondo oscuro) */
[data-theme="dark"] .card,
[data-theme="dark"] .accordion-item,
[data-theme="dark"] .modal-content,
[data-theme="dark"] .contact-form-container,
[data-theme="dark"] .fact-card,
[data-theme="dark"] .donation-box,
[data-theme="dark"] .tutorial-section,
[data-theme="dark"] .keywords-section,
[data-theme="dark"] .newsletter-form {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Bordes de Bootstrap adaptados */
.border-top,
.border-bottom,
.border {
  border-color: var(--border-color) !important;
}

[data-theme="dark"] .bg-light,
[data-theme="dark"] .hero-section,
[data-theme="dark"] .keywords-section,
[data-theme="dark"] .tutorial-section,
[data-theme="dark"] .donation-box,
[data-theme="dark"] .fact-card,
[data-theme="dark"] .newsletter-form,
[data-theme="dark"] .footer-section {
  background-color: var(--bg-section) !important;
}

[data-theme="dark"] .card,
[data-theme="dark"] .accordion-item,
[data-theme="dark"] .modal-content,
[data-theme="dark"] .contact-form-container {
  background-color: var(--bg-elevated) !important;
  color: var(--text-color);
  border-color: var(--border-color);
}

[data-theme="dark"] .accordion-button {
  background-color: var(--bg-elevated);
  color: var(--text-color);
}

[data-theme="dark"] .accordion-button:not(.collapsed) {
  background-color: var(--accent);
  color: white;
}

[data-theme="dark"] .keyword-tag {
  background-color: var(--bg-color);
  color: var(--text-color);
  border-color: var(--border-color);
}

[data-theme="dark"] .keyword-tag.high-volume { background-color: #064e3b; }
[data-theme="dark"] .keyword-tag.medium-volume { background-color: #78350f; }
[data-theme="dark"] .keyword-tag.low-volume { background-color: #7f1d1d; }

[data-theme="dark"] .keyword-highlight {
  background-color: var(--highlight-bg);
  color: #1f2937;
}

[data-theme="dark"] .form-control {
  background-color: var(--bg-color);
  color: var(--text-color);
  border-color: var(--border-color);
}

[data-theme="dark"] .form-control::placeholder { color: var(--text-muted); }

/* ----------- Skip link accesible ----------- */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent);
  color: white;
  padding: 10px 20px;
  z-index: 9999;
  text-decoration: none;
  border-radius: 0 0 8px 0;
  font-weight: 600;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid #fde047;
  outline-offset: 2px;
}

/* ----------- Boton dark mode toggle ----------- */
.theme-toggle {
  background: transparent;
  border: 2px solid currentColor;
  color: white;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition);
  font-size: 1.1rem;
}

.theme-toggle:hover {
  transform: rotate(20deg);
  background: rgba(255, 255, 255, 0.15);
}

/* ----------- Buscador de la galeria ----------- */
.gallery-search {
  max-width: 500px;
  margin: 0 auto 30px;
}

.gallery-search input {
  border: 2px solid var(--border-color);
  border-radius: 25px;
  padding: 12px 20px 12px 45px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%23666' d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 15px center;
  background-size: 18px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 1000px;
  margin: 0 auto;
}

@media (max-width: 991.98px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    max-width: 750px;
  }
}

@media (max-width: 575.98px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    max-width: 100%;
  }
}

.gallery-item {
  cursor: pointer;
  border-radius: 10px;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  aspect-ratio: 1;
}

.gallery-item:hover {
  transform: scale(1.03);
  box-shadow: var(--card-shadow);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.gallery-item.is-hidden {
  display: none;
}

.gallery-empty {
  text-align: center;
  padding: 30px;
  color: var(--text-muted);
  display: none;
}

.gallery-empty.is-visible {
  display: block;
}

/* ----------- Lightbox ----------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 9998;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.lightbox.is-open {
  display: flex;
  opacity: 1;
}

.lightbox img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: rgba(255, 255, 255, 0.15);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
}

.lightbox-close { top: 20px; right: 20px; }
.lightbox-prev { left: 20px; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 20px; top: 50%; transform: translateY(-50%); }

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255, 255, 255, 0.3);
}

.lightbox-counter {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  background: rgba(0, 0, 0, 0.5);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
}

/* ----------- Scroll animations ----------- */
.fade-in-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-in-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ----------- Boton "ir arriba" ----------- */
.back-to-top {
  position: fixed;
  bottom: 20px;
  left: 20px;
  z-index: 1000;
  background: var(--accent);
  color: white;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 1.4rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--card-shadow);
  transition: transform var(--transition), background var(--transition);
}

.back-to-top.is-visible {
  display: flex;
}

.back-to-top:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
}

/* ----------- Formulario de contacto ----------- */
.contact-form-container {
  max-width: 600px;
  margin: 0 auto;
  padding: 30px;
  background: var(--bg-elevated);
  border-radius: 15px;
  border: 3px dashed var(--border-color);
}

.contact-form .form-control {
  border: 2px solid var(--border-color);
  border-radius: 10px;
  padding: 12px 15px;
  margin-bottom: 4px;
}

.contact-form .form-label {
  font-weight: 600;
  margin-top: 15px;
}

.contact-form .invalid-feedback {
  font-size: 0.85rem;
  color: #dc3545;
  min-height: 18px;
  display: block;
}

.contact-form .form-control.is-valid {
  border-color: #198754;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cpath fill='%23198754' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 40px;
}

.contact-form .form-control.is-invalid {
  border-color: #dc3545;
}

.form-success {
  background: #d1e7dd;
  color: #0f5132;
  padding: 15px;
  border-radius: 10px;
  margin-top: 20px;
  display: none;
  border: 2px solid #badbcc;
}

.form-success.is-visible { display: block; }

[data-theme="dark"] .form-success {
  background: #064e3b;
  color: #d1fae5;
  border-color: #10b981;
}

/* ----------- Hero: contraste correcto ----------- */
.hero-section h1,
.hero-section .lead {
  color: var(--text-color);
}

.hero-section h1 .keyword-highlight {
  color: #1f2937;
}

[data-theme="dark"] .hero-section h1,
[data-theme="dark"] .hero-section .lead {
  color: var(--text-color);
}

[data-theme="dark"] .hero-section {
  background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-color) 100%) !important;
}

/* ----------- Iconos sociales: contraste fuerte ----------- */
.social-icons a {
  color: var(--text-color) !important;
  background: var(--bg-elevated);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0 6px !important;
  transition: all var(--transition);
  text-decoration: none;
}

.social-icons a:hover {
  background: var(--accent);
  color: white !important;
  transform: translateY(-3px);
  box-shadow: var(--card-shadow);
  border-color: var(--accent);
}

[data-theme="dark"] .social-icons a {
  color: var(--text-color) !important;
  background: var(--bg-color);
  border-color: var(--text-muted);
}

/* ----------- Footer: legible en ambos modos ----------- */
[data-theme="dark"] .footer-section {
  background-color: var(--bg-elevated) !important;
  color: var(--text-color);
}

[data-theme="dark"] .footer-section a,
[data-theme="dark"] .footer-section .text-decoration-none {
  color: var(--text-color) !important;
}

[data-theme="dark"] .footer-section a:hover {
  color: var(--accent) !important;
}

/* Mejor contraste del keyword-highlight en cualquier tema */
.keyword-highlight {
  display: inline-block;
}

/* ----------- Texto del navbar: links visibles ----------- */
.navbar-dark .navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}

.navbar-dark .navbar-nav .nav-link:hover {
  color: white;
}

/* ----------- Responsive: navbar colapsada en movil ----------- */
@media (max-width: 991.98px) {
  .navbar-collapse .theme-toggle {
    margin-top: 10px;
  }

  .hero-section h1 {
    font-size: 1.75rem;
  }

  .hero-section .lead {
    font-size: 1.1rem;
  }

  .cat-img {
    height: 280px;
  }

  .lightbox-prev,
  .lightbox-next {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }

  .feature-card-img {
    height: 180px;
  }

  .contact-form-container {
    padding: 20px;
  }
}

@media (max-width: 575.98px) {
  body {
    padding-top: 70px;
  }

  .hero-section h1 {
    font-size: 1.4rem;
  }

  .display-4 {
    font-size: 1.6rem;
  }

  .back-to-top {
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
    bottom: 15px;
    left: 15px;
  }

  .scroll-to-section {
    width: 42px !important;
    height: 42px !important;
    bottom: 15px !important;
    right: 15px !important;
  }

  .navbar-brand {
    font-size: 1rem;
  }

  .keyword-tag {
    font-size: 0.8rem;
    padding: 4px 10px !important;
  }
}

/* ----------- Modal: visible en dark mode ----------- */
[data-theme="dark"] .modal-header,
[data-theme="dark"] .modal-footer {
  border-color: var(--border-color);
}

[data-theme="dark"] .btn-close {
  filter: invert(1) grayscale(1);
}

/* ----------- Donation form: legible en dark ----------- */
[data-theme="dark"] .donation-box {
  background-color: var(--bg-elevated);
}

[data-theme="dark"] .form-check-label {
  color: var(--text-color);
}

[data-theme="dark"] .alert-success {
  background-color: #064e3b;
  color: #d1fae5;
  border-color: #10b981;
}

/* ----------- Acordeon legible en dark ----------- */
[data-theme="dark"] .accordion-button::after {
  filter: invert(1);
}