/* ============================================
   QN Masonry Gallery
   Responsive Grid & Masonry Layout mit GLightbox
   @author QUADRONET® Internetlösungen
   @version 4.0 - Masonry ohne JS (CSS Multi-Column)

   Aenderung ggue. v3.0:
   Das Masonry-Layout wird nicht mehr per Masonry.js
   positioniert, sondern ueber natives CSS Multi-Column
   (column-count). Vorteile:
     - vertikaler UND horizontaler Abstand exakt synchron
       ueber --qn-gap (Masonry.js bezog margin-bottom nicht
       zuverlaessig in die Hoehenberechnung ein -> Bilder
       klebten vertikal aneinander)
     - kein JavaScript-Layout -> Masonry.js + imagesLoaded
       entfallen (PageSpeed, kein Reflow nach Bilderladen)
     - kein Timing-Problem, voll responsive
   ============================================ */

/* CSS Custom Properties */
.qn-masonry-gallery {
  --qn-columns: 4;
  --qn-columns-tablet: 2;
  --qn-columns-mobile: 1;
  --qn-gap: 12px;
  --qn-radius: 6px;
  --qn-aspect: 4 / 3;
}

/* ============================================
   GRID LAYOUT (Standard)
   Einheitliche Höhen, sauberes Raster
   ============================================ */

.qn-layout-grid {
  display: grid;
  grid-template-columns: repeat(var(--qn-columns), 1fr);
  gap: var(--qn-gap);
}

/* Aspect Ratios für Grid */
.qn-layout-grid.qn-aspect-1\:1 { --qn-aspect: 1 / 1; }
.qn-layout-grid.qn-aspect-4\:3 { --qn-aspect: 4 / 3; }
.qn-layout-grid.qn-aspect-3\:2 { --qn-aspect: 3 / 2; }
.qn-layout-grid.qn-aspect-16\:9 { --qn-aspect: 16 / 9; }
.qn-layout-grid.qn-aspect-3\:4 { --qn-aspect: 3 / 4; }
.qn-layout-grid.qn-aspect-2\:3 { --qn-aspect: 2 / 3; }

.qn-layout-grid .qn-gallery-figure {
  aspect-ratio: var(--qn-aspect);
  overflow: hidden;
}

.qn-layout-grid .qn-gallery-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* Grid Responsive */
@media (max-width: 1199px) {
  .qn-layout-grid {
    grid-template-columns: repeat(var(--qn-columns-tablet), 1fr);
  }
}

@media (max-width: 767px) {
  .qn-layout-grid {
    grid-template-columns: repeat(var(--qn-columns-mobile), 1fr);
  }
}

/* ============================================
   MASONRY LAYOUT (Pinterest-Stil) - reines CSS
   Echte Spalten via CSS Multi-Column, kein JS.
   Bilder behalten ihre Originalhöhe; der Abstand
   ist horizontal (column-gap) und vertikal
   (margin-bottom) exakt gleich -> beide --qn-gap.
   break-inside:avoid hält jedes Bild zusammen.
   ============================================ */

.qn-layout-masonry {
  column-count: var(--qn-columns);
  column-gap: var(--qn-gap);
  column-fill: balance;
}

.qn-layout-masonry .qn-gallery-item {
  break-inside: avoid;
  -webkit-column-break-inside: avoid; /* aeltere WebKit/Safari */
  width: 100%;
  margin: 0 0 var(--qn-gap);
}

.qn-layout-masonry .qn-gallery-figure img {
  width: 100%;
  height: auto;
}

/* Masonry Responsive */
@media (max-width: 1199px) {
  .qn-layout-masonry {
    column-count: var(--qn-columns-tablet);
  }
}

@media (max-width: 767px) {
  .qn-layout-masonry {
    column-count: var(--qn-columns-mobile);
  }
}

/* ============================================
   Gemeinsame Styles für beide Layouts
   ============================================ */

/* Gallery Item */
.qn-gallery-item {
  overflow: hidden;
}

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

/* Link */
.qn-gallery-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

/* Figure */
.qn-gallery-figure {
  position: relative;
  margin: 0;
  border-radius: var(--qn-radius);
  overflow: hidden;
  background: #f0f0f0;
}

.qn-gallery-figure img {
  display: block;
  transition: transform 0.3s ease, opacity 0.3s ease, filter 0.3s ease;
}

/* Shadow */
.qn-gallery-figure.qn-shadow {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

/* ============================================
   Hover Effects
   ============================================ */

.qn-hover-zoom:hover img {
  transform: scale(1.05);
}

.qn-hover-brighten:hover img {
  filter: brightness(1.1);
}

.qn-hover-darken:hover img {
  filter: brightness(0.85);
}

/* Cursor für Lightbox */
a.glightbox .qn-gallery-figure {
  cursor: zoom-in;
}

/* ============================================
   Overlay
   ============================================ */

.qn-overlay {
  position: absolute;
  left: 0;
  right: 0;
  padding: 10px 15px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
  color: #fff;
  font-size: 0.9rem;
  line-height: 1.3;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.qn-gallery-link:hover .qn-overlay,
.qn-gallery-figure:hover .qn-overlay {
  opacity: 1;
}

/* Overlay Positionen */
.qn-overlay-bottom {
  bottom: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
}

.qn-overlay-top {
  top: 0;
  background: linear-gradient(rgba(0, 0, 0, 0.7), transparent);
}

.qn-overlay-center {
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.6);
  text-align: center;
}

/* ============================================
   Gallery Controls
   ============================================ */

.qn-gallery-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* ============================================
   Load More Button
   ============================================ */

.qn-load-more-wrapper {
  text-align: center;
}

.qn-load-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 1rem;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.qn-load-more-btn:hover {
  transform: translateY(-2px);
}

.qn-btn-count {
  opacity: 0.7;
  font-size: 0.9em;
}

.qn-load-more-btn.qn-loading {
  pointer-events: none;
  opacity: 0.7;
}

.qn-load-more-btn.qn-loading .qn-btn-text::after {
  content: '...';
  animation: qn-dots 1s steps(3, end) infinite;
}

@keyframes qn-dots {
  0%, 20% { content: '.'; }
  40% { content: '..'; }
  60%, 100% { content: '...'; }
}

/* ============================================
   Mobile Anpassungen
   ============================================ */

@media (max-width: 767px) {
  .qn-overlay {
    opacity: 1;
    font-size: 0.8rem;
    padding: 8px 12px;
  }

  .qn-gallery-controls {
    flex-direction: column;
  }
}

/* ============================================
   Animation beim Laden
   Grid: dezenter Slide-up (transform unkritisch).
   Masonry/Columns: NUR Opacity - transform auf
   Column-Items kann in einzelnen Engines Render-
   Glitches erzeugen, daher bewusst vermieden.
   ============================================ */

.qn-layout-grid .qn-gallery-item {
  animation: qn-fadeInUp 0.4s ease forwards;
  opacity: 0;
}

.qn-layout-masonry .qn-gallery-item {
  animation: qn-fadeIn 0.4s ease forwards;
  opacity: 0;
}

@keyframes qn-fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes qn-fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Barrierefreiheit: Bei reduzierter Bewegung keine
   Animation - sonst bliebe opacity:0 haengen. */
@media (prefers-reduced-motion: reduce) {
  .qn-gallery-item {
    animation: none !important;
    opacity: 1 !important;
  }

  .qn-gallery-figure img {
    transition: none !important;
  }
}

/* Staggered Animation */
.qn-gallery-item:nth-child(1) { animation-delay: 0.05s; }
.qn-gallery-item:nth-child(2) { animation-delay: 0.1s; }
.qn-gallery-item:nth-child(3) { animation-delay: 0.15s; }
.qn-gallery-item:nth-child(4) { animation-delay: 0.2s; }
.qn-gallery-item:nth-child(5) { animation-delay: 0.25s; }
.qn-gallery-item:nth-child(6) { animation-delay: 0.3s; }
.qn-gallery-item:nth-child(7) { animation-delay: 0.35s; }
.qn-gallery-item:nth-child(8) { animation-delay: 0.4s; }
.qn-gallery-item:nth-child(n+9) { animation-delay: 0.45s; }

/* ============================================
   Print Styles
   ============================================ */

@media print {
  .qn-masonry-gallery {
    display: block;
  }

  .qn-gallery-item {
    display: inline-block;
    width: 30%;
    margin: 1%;
    page-break-inside: avoid;
  }

  .qn-gallery-controls {
    display: none;
  }
}