/* ==========================================================================
   FOTOPRO Client Template Styles
   Target Theme: Medium Charcoal Gray Background | No Rounded Corners
   Visual Spacing: 6px strict grid spacing
   ========================================================================== */

:root {
  --bg-color: #333333;       /* Medium charcoal-grey */
  --card-bg: #262626;
  --text-main: #F5F5F5;
  --text-muted: #B0B0B0;
  --accent-color: #3B82F6;
  --accent-hover: #2563EB;
  --focus-ring: #60A5FA;
  --gap-size: 6px;           /* Strict 6px gap */
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

/* Accessibility Focus Indicators (WCAG 2.1 AA) */
:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

/* Header Section */
.gallery-header {
  padding: 24px;
  background-color: #222222;
  border-bottom: 1px solid #444;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.gallery-header h1 {
  font-size: 2rem;
  font-weight: 700;
}

.header-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.control-group, .button-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Base Button Styling (Minimum 44x44px touch target) */
.btn, .action-btn {
  min-width: 44px;
  min-height: 44px;
  padding: 8px 16px;
  background-color: #444;
  color: #fff;
  border: none;
  border-radius: 0; /* Strict requirement: NO rounded corners */
  cursor: pointer;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn:hover { background-color: #555; }
.btn.primary { background-color: var(--accent-color); }
.btn.primary:hover { background-color: var(--accent-hover); }

/* Masonry Grid Layout */
.masonry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap-size); /* 6px gap */
  padding: var(--gap-size);
}

/* Responsive Breakpoints for Grid */
@media (max-width: 600px) {
  .masonry-grid { grid-template-columns: repeat(2, 1fr) !important; }
}
@media (max-width: 400px) {
  .masonry-grid { grid-template-columns: repeat(1, 1fr) !important; }
}

/* Thumbnail Styling */
.thumb-item {
  position: relative;
  background-color: #1a1a1a;
  overflow: hidden;
  border-radius: 0 !important; /* NO rounded corners */
}

.thumb-item img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0 !important;
}

.thumb-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 12px;
  opacity: 0;
  transition: opacity 0.2s ease-in-out;
}

/* Reveal interactive controls on mouse hover / keyboard focus */
.thumb-item:hover .thumb-overlay,
.thumb-item:focus-within .thumb-overlay {
  opacity: 1;
}

.thumb-title {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,0.6);
  padding: 6px 10px;
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Lightbox & Slideshow Override */
.lightbox {
  position: fixed;
  inset: 0;
  background-color: rgba(0,0,0,0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

/* Auto-hide controls during active slideshow unless hovered */
.slideshow-active .lightbox-ui,
.slideshow-active .lb-btn {
  opacity: 0;
  transition: opacity 0.4s ease;
}

.slideshow-active:hover .lightbox-ui,
.slideshow-active:hover .lb-btn {
  opacity: 1;
}

.lb-btn {
  position: absolute;
  background: rgba(255,255,255,0.1);
  color: white;
  border: none;
  font-size: 1.5rem;
  min-width: 44px;
  min-height: 44px;
  cursor: pointer;
  border-radius: 0 !important;
}

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

.star-rating span {
  cursor: pointer;
  font-size: 1.25rem;
  color: #666;
}
.star-rating span.active { color: #FBBF24; }