/* ==========================================================================
   Becca Rasmussen - Archival Photo Gallery & RAW Uploader
   Visual World: Precision Contact Sheet & Master Print
   ========================================================================== */

:root {
  --bg-main: #0c0d10;
  --bg-surface: #14151a;
  --bg-card: #181920;
  --bg-elevated: #20222b;
  --bg-dropzone: #131419;

  --border-subtle: #1e2029;
  --border-strong: #2a2c38;
  --border-focus: #e29948;

  --text-primary: #f4f3ef;
  --text-secondary: #9ea3b0;
  --text-muted: #787c8a;

  --accent-amber: #e29948;
  --accent-amber-hover: #f0aa5d;
  --accent-amber-subtle: rgba(226, 153, 72, 0.12);

  --status-success: #4ecb71;
  --status-error: #e05757;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Roboto Mono", Menlo, Consolas, monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --transition-fast: 160ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 240ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Browser Surface Theming */
::selection {
  background: var(--accent-amber);
  color: var(--bg-main);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-main);
}

::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: #3c3f4e;
}

:focus-visible {
  outline: 2px solid var(--accent-amber);
  outline-offset: 2px;
}

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

html, body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Container */
.container {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  gap: 1rem;
}

.brand-block {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-tagline {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 0.15rem;
  letter-spacing: 0.01em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.stat-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.btn-icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.btn-primary {
  background-color: var(--accent-amber);
  color: var(--bg-main);
  border: 1px solid var(--accent-amber);
}

.btn-primary:hover {
  background-color: var(--accent-amber-hover);
  border-color: var(--accent-amber-hover);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
  background-color: var(--bg-elevated);
  border-color: #3b3e4e;
}

.btn-ghost {
  color: var(--text-secondary);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  color: var(--text-primary);
  background-color: var(--bg-card);
}

.btn-danger {
  background-color: var(--status-error);
  color: #ffffff;
  border: 1px solid var(--status-error);
}

.btn-danger:hover {
  background-color: #eb6868;
  border-color: #eb6868;
}

.btn-danger:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}


/* ==========================================================================
   Upload Panel (Drawer)
   ========================================================================== */

.upload-panel {
  border-bottom: 1px solid var(--border-strong);
  background: var(--bg-surface);
  padding: 2rem 0;
  display: none;
  animation: slideDown 220ms cubic-bezier(0.16, 1, 0.3, 1);
}

.upload-panel.is-open {
  display: block;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.upload-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.upload-panel-title {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.upload-panel-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  background-color: var(--bg-dropzone);
  padding: 3rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  position: relative;
}

.dropzone:hover, .dropzone.is-dragover {
  border-color: var(--accent-amber);
  background-color: rgba(226, 153, 72, 0.04);
}

.dropzone-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 1rem;
  stroke: var(--accent-amber);
  stroke-width: 1.6;
  fill: none;
}

.dropzone-heading {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.dropzone-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 1rem;
}

.format-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
}

.format-tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-size: 0.74rem;
  font-family: var(--font-mono);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

.format-tag.raw-tag {
  color: var(--accent-amber);
  border-color: rgba(226, 153, 72, 0.25);
}

/* Upload Queue */
.upload-queue-container {
  margin-top: 1.75rem;
  display: none;
}

.upload-queue-container.has-items {
  display: block;
}

.queue-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.queue-progress-bar-total {
  width: 100%;
  height: 4px;
  background-color: var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 1rem;
}

.queue-progress-bar-fill {
  height: 100%;
  background-color: var(--accent-amber);
  width: 100%;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 150ms ease;
}

.queue-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.queue-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  gap: 0.75rem;
  font-size: 0.85rem;
}

.queue-item-name {
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  max-width: 320px;
}

.queue-item-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.queue-item-status {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.status-badge {
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.status-badge.waiting {
  background-color: var(--border-subtle);
  color: var(--text-secondary);
}

.status-badge.uploading {
  background-color: var(--accent-amber-subtle);
  color: var(--accent-amber);
}

.status-badge.processing {
  background-color: rgba(99, 140, 255, 0.12);
  color: #8bb2ff;
}

.status-badge.complete {
  background-color: rgba(78, 203, 113, 0.12);
  color: var(--status-success);
}

.status-badge.error {
  background-color: rgba(224, 87, 87, 0.12);
  color: var(--status-error);
}

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

.gallery-controls-section {
  padding: 1.5rem 0 1rem;
}

.controls-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1rem;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background-color: var(--bg-surface);
  padding: 0.25rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.filter-btn {
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-primary);
}

.filter-btn.is-active {
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-weight: 500;
}

.sort-and-view-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.select-toggle-btn {
  font-size: 0.82rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  transition: all var(--transition-fast);
}

.select-toggle-btn.is-active {
  background-color: var(--accent-amber);
  color: var(--bg-main);
  border-color: var(--accent-amber);
  font-weight: 500;
}

.select-toggle-btn.is-active:hover {
  background-color: var(--accent-amber-hover);
  border-color: var(--accent-amber-hover);
}

.sort-select {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.82rem;
}

.density-toggle {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.2rem;
}

.density-btn {
  padding: 0.25rem 0.4rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.density-btn.is-active {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

/* ==========================================================================
   Master Contact Sheet Gallery Grid
   ========================================================================== */

.gallery-section {
  padding: 1.5rem 0 5rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  transition: gap var(--transition-fast);
}

.gallery-grid.is-compact {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

/* Photo Card */
.photo-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  user-select: none;
}

.photo-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

/* Card Selection Checkbox */
.photo-select-checkbox {
  position: absolute;
  top: 10px;
  left: 10px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background-color: rgba(12, 13, 16, 0.75);
  border: 1.5px solid rgba(255, 255, 255, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  padding: 0;
  opacity: 0;
  transform: scale(0.85);
  transition: opacity var(--transition-fast), transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.photo-select-checkbox .check-icon {
  width: 14px;
  height: 14px;
  stroke: var(--bg-main);
  stroke-width: 2.6;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

/* Checkbox visibility conditions */
body.is-admin .photo-card:hover .photo-select-checkbox {
  opacity: 0.85;
  transform: scale(1);
}

.photo-select-checkbox:hover {
  opacity: 1 !important;
  border-color: var(--accent-amber) !important;
  transform: scale(1.1) !important;
}

.gallery-grid.is-select-mode .photo-select-checkbox {
  opacity: 0.85;
  transform: scale(1);
}

/* Card is-selected state */
.photo-card.is-selected {
  border-color: var(--accent-amber) !important;
  box-shadow: 0 0 0 1px var(--accent-amber), 0 8px 24px rgba(0, 0, 0, 0.4);
}

.photo-card.is-selected .photo-thumb-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background-color: rgba(226, 153, 72, 0.12);
  pointer-events: none;
  z-index: 2;
}

.photo-card.is-selected .photo-select-checkbox {
  opacity: 1 !important;
  background-color: var(--accent-amber);
  border-color: var(--accent-amber);
  transform: scale(1);
}

.photo-card.is-selected .photo-select-checkbox .check-icon {
  opacity: 1;
}

.photo-thumb-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 2;
  background-color: var(--bg-main);
  overflow: hidden;
}

.photo-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease;
}

.photo-card:hover .photo-thumb {
  transform: scale(1.02);
}


/* Card Header & Footer (Contact Sheet Aesthetics) */
.photo-card-info {
  padding: 0.75rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

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

.frame-index {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.card-badges {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.format-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.format-badge.is-raw {
  color: var(--accent-amber);
  border-color: rgba(226, 153, 72, 0.3);
}

.format-badge.is-video {
  color: #8bb2ff;
  border-color: rgba(139, 178, 255, 0.3);
}

.video-play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  background-color: rgba(12, 13, 16, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  pointer-events: none;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.photo-card:hover .video-play-overlay {
  transform: translate(-50%, -50%) scale(1.1);
  background-color: rgba(12, 13, 16, 0.9);
}

.photo-title {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.photo-exif-summary {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Empty State */
.empty-gallery {
  text-align: center;
  padding: 6rem 1.5rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: 600px;
  margin: 2rem auto;
}

.empty-icon {
  width: 48px;
  height: 48px;
  stroke: var(--text-muted);
  stroke-width: 1.5;
  fill: none;
  margin: 0 auto 1.25rem;
}

.empty-title {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.empty-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   Full-Bleed Lightbox & Loupe
   ========================================================================== */

.lightbox-modal {
  position: fixed;
  inset: 0;
  background-color: rgba(12, 13, 16, 0.97);
  z-index: 100;
  display: none;
  flex-direction: column;
  animation: fadeIn 180ms ease;
}

.lightbox-modal.is-active {
  display: flex;
}

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

.lightbox-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-main);
  z-index: 10;
}

.lightbox-title-area {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  overflow: hidden;
}

.lightbox-counter {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.lightbox-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lightbox-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lightbox-content {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 1rem;
}

.lightbox-image-wrap {
  max-width: 100%;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 200ms ease;
  user-select: none;
}

.lightbox-image-wrap.is-zoomed {
  cursor: grab;
  overflow: auto;
}

.lightbox-image {
  max-width: 90vw;
  max-height: 78vh;
  object-fit: contain;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  border-radius: var(--radius-sm);
}

.lightbox-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 50%;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
  z-index: 20;
}

.lightbox-nav-btn:hover {
  background-color: var(--bg-card);
  border-color: var(--border-strong);
}

.lightbox-nav-prev {
  left: 1.5rem;
}

.lightbox-nav-next {
  right: 1.5rem;
}

/* Lightbox Info Drawer */
.lightbox-bottombar {
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-main);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  z-index: 10;
}

.exif-readout-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.exif-item {
  display: flex;
  flex-direction: column;
}

.exif-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}

.exif-val {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-primary);
  font-weight: 500;
}

.lightbox-downloads {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* ==========================================================================
   Admin Authentication Modal
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(12, 13, 16, 0.85);
  backdrop-filter: blur(4px);
  z-index: 120;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-backdrop.is-active {
  display: flex;
}

.modal-dialog {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 420px;
  padding: 2rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  animation: scaleUp 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes scaleUp {
  from {
    opacity: 0;
    transform: scale(0.96);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-title {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.modal-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-input {
  width: 100%;
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.85rem;
  color: var(--text-primary);
  font-size: 0.92rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  border-color: var(--accent-amber);
}

.modal-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.65rem;
}

.auth-error-msg {
  color: var(--status-error);
  font-size: 0.82rem;
  margin-top: 0.5rem;
  display: none;
}

/* ==========================================================================
   Floating Batch Action Bar
   ========================================================================== */

.batch-action-bar {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(140%);
  z-index: 60;
  background-color: rgba(20, 21, 26, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-strong);
  border-radius: 9999px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.06);
  padding: 0.55rem 0.85rem;
  transition: transform 260ms cubic-bezier(0.16, 1, 0.3, 1), opacity 200ms ease;
  opacity: 0;
  pointer-events: none;
  max-width: calc(100vw - 2rem);
}

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

.batch-bar-inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: nowrap;
}

.batch-bar-left, .batch-bar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.batch-count-chip {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-amber);
  background-color: var(--accent-amber-subtle);
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid rgba(226, 153, 72, 0.25);
  white-space: nowrap;
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */

.toast-notification {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 150;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--accent-amber);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  color: var(--text-primary);
  font-size: 0.88rem;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
  transform: translateY(20px);
  opacity: 0;
  pointer-events: none;
  transition: transform 220ms cubic-bezier(0.16, 1, 0.3, 1), opacity 220ms ease;
  max-width: 380px;
}

.toast-notification.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.toast-notification.is-success {
  border-left-color: var(--status-success);
}

.toast-notification.is-error {
  border-left-color: var(--status-error);
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .controls-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .sort-and-view-group {
    width: 100%;
    justify-content: space-between;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .batch-action-bar {
    bottom: 1rem;
    width: calc(100% - 1.5rem);
    border-radius: var(--radius-lg);
    padding: 0.65rem 0.85rem;
  }

  .batch-bar-inner {
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
  }

  .batch-bar-left, .batch-bar-right {
    width: 100%;
    justify-content: space-between;
  }

  .lightbox-bottombar {
    flex-direction: column;
    align-items: flex-start;
  }

  .lightbox-downloads {
    width: 100%;
    justify-content: stretch;
  }

  .lightbox-downloads .btn {
    flex: 1;
  }

  .lightbox-nav-prev {
    left: 0.5rem;
  }

  .lightbox-nav-next {
    right: 0.5rem;
  }
}