/* ==========================================================================
   Kundengallerie - Master Stylesheet (Modern & High-End Dark Theme)
   Inspiration: Pixieset, SmugMug, Adobe Portfolio
   ========================================================================== */

:root {
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Playfair Display", Georgia, serif;

  /* Obsidian Dark Theme (Default) */
  --bg-body: #0a0c10;
  --bg-surface: #12151c;
  --bg-surface-elevated: #1a1f2c;
  --bg-card: rgba(22, 27, 38, 0.7);
  --bg-glass: rgba(10, 12, 16, 0.85);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(212, 175, 55, 0.5);

  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --accent-gold: #d4af37;
  --accent-gold-hover: #b8972e;
  --accent-blue: #38bdf8;
  --accent-red: #ef4444;
  --accent-green: #10b981;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(212, 175, 55, 0.25);

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Override */
[data-theme="light"] {
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.88);

  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(184, 151, 46, 0.6);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.12);
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Header & Glass Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-normal);
}

.header-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.brand-logo .logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-gold), #fef08a);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  font-weight: 700;
  font-size: 1rem;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Button & Icon-Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--accent-gold);
  color: #000;
  font-weight: 600;
}

.btn-primary:hover {
  background-color: var(--accent-gold-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover {
  background-color: var(--border-subtle);
}

.btn-icon {
  width: 38px;
  height: 38px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--border-subtle);
  color: var(--accent-gold);
}

/* Main Layout Container */
.main-content {
  flex: 1;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem;
}

/* Hero / Breadcrumb Bar */
.gallery-hero {
  margin-bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.gallery-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.gallery-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Toolbar (Search, Filter, Sort, Downloads) */
.gallery-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-subtle);
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.search-input-wrapper {
  position: relative;
  min-width: 260px;
}

.search-input-wrapper input {
  width: 100%;
  padding: 0.5rem 1rem 0.5rem 2.25rem;
  background: var(--bg-body);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-input-wrapper input:focus {
  border-color: var(--accent-gold);
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.select-dropdown {
  background: var(--bg-body);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  outline: none;
  cursor: pointer;
}

/* Gallery Overview Cards Grid */
.galleries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.gallery-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-focus);
}

.gallery-card-cover {
  width: 100%;
  height: 240px;
  background-color: var(--bg-surface-elevated);
  position: relative;
  overflow: hidden;
}

.gallery-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-card:hover .gallery-card-cover img {
  transform: scale(1.05);
}

.gallery-card-info {
  padding: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gallery-card-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.gallery-card-count {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Masonry Photo Grid Layout */
.masonry-grid {
  column-count: 4;
  column-gap: 1.25rem;
}

@media (max-width: 1200px) {
  .masonry-grid { column-count: 3; }
}
@media (max-width: 768px) {
  .masonry-grid { column-count: 2; column-gap: 0.75rem; }
}
@media (max-width: 480px) {
  .masonry-grid { column-count: 1; }
}

.photo-item {
  break-inside: avoid;
  margin-bottom: 1.25rem;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.photo-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.photo-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-slow);
}

.photo-item:hover img {
  transform: scale(1.02);
}

/* Photo Item Hover Overlay */
.photo-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.4) 0%, transparent 40%, rgba(0,0,0,0.7) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 0.75rem;
  pointer-events: none;
}

.photo-item:hover .photo-overlay,
.photo-item.selected .photo-overlay {
  opacity: 1;
  pointer-events: auto;
}

.photo-overlay-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.photo-overlay-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  color: #fff;
  font-size: 0.8rem;
}

.photo-checkbox {
  width: 22px;
  height: 22px;
  cursor: pointer;
  accent-color: var(--accent-gold);
}

.photo-action-btn {
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.photo-action-btn:hover {
  background: var(--accent-gold);
  color: #000;
  border-color: var(--accent-gold);
}

.photo-action-btn.active {
  color: var(--accent-red);
  background: rgba(255, 255, 255, 0.9);
}

/* Floating Batch Action Bar */
.floating-batch-bar {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-full);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
}

.floating-batch-bar.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  display: none;
  flex-direction: column;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.lightbox-modal.active {
  display: flex;
  opacity: 1;
}

.lightbox-header {
  height: 60px;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
  color: #fff;
}

.lightbox-counter {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.lightbox-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lightbox-body {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  user-select: none;
  touch-action: none;
}

.lightbox-img-container {
  max-width: 100%;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  box-shadow: 0 5px 30px rgba(0,0,0,0.8);
  pointer-events: none;
}

.lightbox-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.5rem;
  transition: all var(--transition-fast);
  z-index: 5;
}

.lightbox-nav-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-50%) scale(1.1);
}

.lightbox-prev { left: 1.5rem; }
.lightbox-next { right: 1.5rem; }

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  padding: 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}