/* ==========================================================================
   CollageCraft Studio - Modern CSS Design System
   ========================================================================== */

:root {
  --bg-main: #0B0D13;
  --bg-card: #131722;
  --bg-card-hover: #1A1F2E;
  --bg-input: #1F2437;
  --border-ui: #2A3147;
  --border-focus: #6366F1;
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  --primary: #6366F1;
  --primary-hover: #4F46E5;
  --primary-glow: rgba(99, 102, 241, 0.25);
  --accent-rose: #F43F5E;
  --accent-emerald: #10B981;
  
  /* Dynamic Collage Properties (manipulated via JS) */
  --collage-border-width: 6px;
  --collage-border-color: #FFFFFF;
  --collage-corner-radius: 0px;
  --collage-outer-padding: 0px;
  --collage-aspect-ratio: 1 / 1;
}

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

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

/* App Wrapper */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   Top Navigation Header
   -------------------------------------------------------------------------- */
.top-bar {
  height: 64px;
  background: rgba(19, 23, 34, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-ui);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 50;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #6366F1, #8B5CF6);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}

.brand-text .badge {
  font-size: 0.7rem;
  font-weight: 600;
  background: rgba(99, 102, 241, 0.15);
  color: #A5B4FC;
  padding: 2px 8px;
  border-radius: 9999px;
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Button Base Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
  border: 1px solid transparent;
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #6366F1, #4F46E5);
  color: #FFFFFF;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4F46E5, #4338CA);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-main);
  border-color: var(--border-ui);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: #3F4865;
}

#btn-quick-copy {
  border-color: rgba(99, 102, 241, 0.4);
}

#btn-quick-copy:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--primary);
  color: #FFFFFF;
}

#btn-quick-copy svg {
  color: #818CF8;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

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

.btn-sm {
  padding: 5px 10px;
  font-size: 0.775rem;
  border-radius: 6px;
}

/* --------------------------------------------------------------------------
   Main Workspace Layout
   -------------------------------------------------------------------------- */
.main-layout {
  display: flex;
  flex: 1;
  height: calc(100vh - 64px);
  overflow: hidden;
}

/* Left Sidebar Controls */
.sidebar {
  width: 380px;
  background: var(--bg-card);
  border-right: 1px solid var(--border-ui);
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
  overflow-y: auto;
  flex-shrink: 0;
}

.sidebar::-webkit-scrollbar {
  width: 6px;
}
.sidebar::-webkit-scrollbar-thumb {
  background: var(--border-ui);
  border-radius: 3px;
}

.control-card {
  background: rgba(31, 36, 55, 0.4);
  border: 1px solid var(--border-ui);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.card-header h3 {
  font-size: 0.92rem;
  font-weight: 700;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 8px;
}

.slot-count-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: #818CF8;
  background: rgba(99, 102, 241, 0.15);
  padding: 3px 9px;
  border-radius: 6px;
  border: 1px solid rgba(99, 102, 241, 0.25);
}

/* Photo Count Buttons */
.photo-count-selector {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.count-buttons {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.count-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-ui);
  color: var(--text-main);
  padding: 8px 0;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.count-btn:hover {
  background: var(--bg-card-hover);
  border-color: #4B5574;
}

.count-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 2px 8px var(--primary-glow);
}

.custom-count-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-top: 4px;
}

.stepper {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-ui);
  border-radius: 6px;
  overflow: hidden;
}

.step-btn {
  background: transparent;
  border: none;
  color: var(--text-main);
  width: 28px;
  height: 28px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}

.step-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.stepper input {
  width: 36px;
  background: transparent;
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-weight: 700;
  font-size: 0.85rem;
  outline: none;
}

/* Layout Preset Selector */
.sub-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 12px;
}

.section-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.layout-presets {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.layout-preset-card {
  aspect-ratio: 1;
  background: var(--bg-input);
  border: 2px solid var(--border-ui);
  border-radius: 8px;
  padding: 5px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
}

.layout-preset-card:hover {
  border-color: #4B5574;
  transform: scale(1.03);
}

.layout-preset-card.active {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.12);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.3);
}

.layout-mini-preview {
  flex: 1;
  display: grid;
  gap: 2px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 4px;
  overflow: hidden;
  padding: 2px;
}

.layout-mini-preview .mini-slot {
  background: #4B5563;
  border-radius: 2px;
}

.layout-preset-card.active .layout-mini-preview .mini-slot {
  background: #818CF8;
}

/* Ratio Presets */
.ratio-presets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.ratio-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-ui);
  color: var(--text-muted);
  padding: 8px 6px;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.ratio-btn:hover {
  border-color: #4B5574;
  color: var(--text-main);
}

.ratio-btn.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--primary);
  color: #FFFFFF;
}

.ratio-box {
  border: 1.5px solid currentColor;
  border-radius: 2px;
  opacity: 0.85;
}

.r-1-1 { width: 18px; height: 18px; }
.r-4-5 { width: 16px; height: 20px; }
.r-9-16 { width: 12px; height: 22px; }
.r-16-9 { width: 22px; height: 13px; }
.r-3-4 { width: 15px; height: 20px; }

.fit-mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.fit-mode-toggle .btn {
  font-size: 0.78rem;
  padding: 7px 8px;
  border-radius: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border-ui);
  color: var(--text-muted);
}

.fit-mode-toggle .btn:hover {
  border-color: #4B5574;
  color: var(--text-main);
}

.fit-mode-toggle .btn.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--primary);
  color: #FFFFFF;
}

/* Control Sliders & Inputs */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.slider-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
}

.slider-header label {
  color: var(--text-muted);
  font-weight: 500;
}

.value-display {
  color: #FFFFFF;
  font-weight: 700;
  font-family: monospace;
  font-size: 0.8rem;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--bg-input);
  border-radius: 3px;
  outline: none;
  border: 1px solid var(--border-ui);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #FFFFFF;
  cursor: pointer;
  border: 2px solid var(--primary);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Color Palette */
.color-palette {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s;
  position: relative;
}

.color-swatch:hover {
  transform: scale(1.15);
}

.color-swatch.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.4);
}

.custom-color-wrapper {
  position: relative;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-input);
  border: 1px solid var(--border-ui);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.custom-color-wrapper input[type="color"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.color-picker-icon {
  font-size: 0.8rem;
  pointer-events: none;
}

/* Bulk Upload Dropzone */
.bulk-upload-zone {
  border: 2px dashed var(--border-ui);
  border-radius: 10px;
  padding: 18px 12px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
  background: rgba(31, 36, 55, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
}

.bulk-upload-zone:hover,
.bulk-upload-zone.drag-over {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
  color: var(--text-main);
}

.bulk-upload-zone svg {
  color: #818CF8;
}

.bulk-upload-zone p {
  font-size: 0.82rem;
}

.upload-hint {
  font-size: 0.72rem;
  color: var(--text-dim);
}

/* --------------------------------------------------------------------------
   Center Canvas Workspace
   -------------------------------------------------------------------------- */
.canvas-workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #08090D;
  position: relative;
  overflow: hidden;
}

.workspace-hint-bar {
  background: rgba(19, 23, 34, 0.7);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.hint-key {
  color: #FFFFFF;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
}

.canvas-viewport {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow: auto;
}

/* --------------------------------------------------------------------------
   The Collage Canvas Container
   -------------------------------------------------------------------------- */
.collage-canvas {
  width: 580px;
  max-width: 90%;
  aspect-ratio: var(--collage-aspect-ratio);
  background-color: var(--collage-border-color);
  padding: var(--collage-outer-padding);
  display: grid;
  gap: var(--collage-border-width);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
  border-radius: var(--collage-corner-radius);
  position: relative;
  transition: width 0.2s ease, aspect-ratio 0.2s ease, gap 0.15s ease;
  user-select: none;
}

/* Responsive aspect ratios */
.collage-canvas[data-ratio="1:1"] { aspect-ratio: 1 / 1; }
.collage-canvas[data-ratio="4:5"] { aspect-ratio: 4 / 5; width: 480px; }
.collage-canvas[data-ratio="9:16"] { aspect-ratio: 9 / 16; width: 380px; }
.collage-canvas[data-ratio="16:9"] { aspect-ratio: 16 / 9; width: 680px; }
.collage-canvas[data-ratio="3:4"] { aspect-ratio: 3 / 4; width: 490px; }

/* --------------------------------------------------------------------------
   Photo Slot Card & Image Manipulation
   -------------------------------------------------------------------------- */
.photo-slot {
  position: relative;
  background: #1A1F2E;
  overflow: hidden;
  border-radius: var(--collage-corner-radius);
  cursor: grab;
  touch-action: none;
  transition: outline 0.15s ease;
}

.photo-slot.is-dragging {
  cursor: grabbing !important;
}

.photo-slot.drag-target {
  outline: 3px dashed var(--primary);
  outline-offset: -3px;
}

.photo-slot-inner {
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* Transformed Image */
.slot-image {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: contain; /* Default to contain so original images are never cropped automatically */
  max-width: none;
  transform-origin: center center;
  pointer-events: none; /* Allows parent slot to handle pan drag & wheel zoom */
  will-change: transform;
}

/* Empty Slot Placeholder */
.slot-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
  width: 100%;
  height: 100%;
  background: #151926;
  border: 1px dashed #2E364F;
  border-radius: inherit;
  transition: all 0.15s ease;
  cursor: pointer;
}

.slot-empty-state:hover {
  background: #1C2234;
  border-color: var(--primary);
  color: #FFFFFF;
}

.slot-empty-state svg {
  color: #818CF8;
}

.slot-empty-state span {
  font-size: 0.78rem;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   On-Hover Floating Action Bar & Overlay Controls
   (Key requirement: Adjust size/position by hovering over it)
   -------------------------------------------------------------------------- */
.slot-hover-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 10px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 20;
}

/* Reveal when hovering over the photo slot */
.photo-slot:hover .slot-hover-overlay {
  opacity: 1;
  pointer-events: auto;
}

/* Keep visible while dragging or interacting */
.photo-slot.is-active .slot-hover-overlay {
  opacity: 1;
  pointer-events: auto;
}

/* Top toolbar of the slot */
.slot-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  transform: translateY(-8px);
  transition: transform 0.2s ease;
}

.photo-slot:hover .slot-top-bar {
  transform: translateY(0);
}

.slot-badge-idx {
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  color: #FFFFFF;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.slot-action-btn-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.slot-tool-btn {
  width: 30px;
  height: 30px;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.12s ease;
}

.slot-tool-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  transform: scale(1.08);
}

.slot-tool-btn.btn-danger:hover {
  background: var(--accent-rose);
  border-color: var(--accent-rose);
}

/* Center Pan Indicator Icon */
.slot-pan-indicator {
  align-self: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 0.72rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  gap: 5px;
  pointer-events: none;
  opacity: 0.75;
}

/* Bottom Floating Zoom & Transform Controls */
.slot-bottom-bar {
  background: rgba(15, 17, 23, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  padding: 6px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  transform: translateY(8px);
  transition: transform 0.2s ease;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.photo-slot:hover .slot-bottom-bar {
  transform: translateY(0);
}

.zoom-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.slot-zoom-slider {
  flex: 1;
  height: 4px;
}

.zoom-percent-tag {
  font-size: 0.72rem;
  font-weight: 700;
  font-family: monospace;
  color: #FFFFFF;
  min-width: 38px;
  text-align: right;
}

/* --------------------------------------------------------------------------
   Workspace Footer
   -------------------------------------------------------------------------- */
.workspace-footer {
  height: 42px;
  background: rgba(19, 23, 34, 0.8);
  backdrop-filter: blur(6px);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.zoom-preview-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* --------------------------------------------------------------------------
   Export Modal
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-ui);
  border-radius: 16px;
  width: 620px;
  max-width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}

.modal-header {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border-ui);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #FFFFFF;
}

.btn-close-modal {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
}

.btn-close-modal:hover {
  background: var(--bg-input);
  color: #FFFFFF;
}

.modal-body {
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  overflow-y: auto;
}

.export-preview-container {
  background: #08090D;
  border: 1px solid var(--border-ui);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  max-height: 280px;
  overflow: hidden;
}

#export-preview-canvas {
  max-width: 100%;
  max-height: 240px;
  object-fit: contain;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.export-settings {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.setting-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting-row label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.export-res-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.res-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-ui);
  padding: 10px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.res-btn strong {
  font-size: 0.85rem;
  color: #FFFFFF;
}

.res-btn span {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.res-btn:hover {
  border-color: #4B5574;
}

.res-btn.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--primary);
}

.res-btn.active strong {
  color: #818CF8;
}

.format-options {
  display: flex;
  gap: 16px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.84rem;
  color: var(--text-main);
  cursor: pointer;
}

.modal-footer {
  padding: 16px 22px;
  border-top: 1px solid var(--border-ui);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  background: rgba(19, 23, 34, 0.6);
}

/* Toast Notifications */
.toast-notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1E2433;
  color: #FFFFFF;
  border: 1px solid #3B4461;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 200;
  animation: toastIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive tweaks */
@media (max-width: 900px) {
  .main-layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    max-height: 40vh;
    border-right: none;
    border-bottom: 1px solid var(--border-ui);
  }
}