/* ================================================================
   Image Viewer - Redesigned bottom toolbar UI
   All classes prefixed with iv- to avoid conflicts.
   Theme-aware: all colors derive from --theme-* CSS custom properties.
   ================================================================ */

/* --- Theme Variable Bridge ---
   The fullscreen overlay is always dark (rgba(0,0,0,0.9)), so the IV
   UI must use dark-suitable colors regardless of the app theme.
   We keep --theme-accent for branding, but override base colors
   to dark palette when the app is in light mode. */

/* Scope: all IV chrome containers */
.iv-toolbar,
.iv-anno-bar,
.iv-minimap,
.iv-info-panel,
.iv-export-panel,
.iv-anno-guide {
  --iv-accent: var(--theme-accent);
  --iv-bg: color-mix(in srgb, var(--theme-bg) 92%, transparent);
  --iv-bg-solid: var(--theme-bg);
  --iv-surface: var(--theme-surface);
  --iv-border: var(--theme-border);
  --iv-fg: var(--theme-text);
  --iv-text: var(--theme-text);
  --iv-muted: var(--theme-muted);
  --iv-btn-bg: color-mix(in srgb, var(--theme-accent) 4%, transparent);
  --iv-btn-hover-bg: color-mix(in srgb, var(--theme-accent) 8%, transparent);
  --iv-btn-hover-border: color-mix(in srgb, var(--theme-accent) 40%, var(--theme-border));
  --iv-btn-hover-text: color-mix(in srgb, var(--theme-accent) 70%, var(--theme-text));
  --iv-active-bg: color-mix(in srgb, var(--theme-accent) 14%, transparent);
  --iv-active-glow: color-mix(in srgb, var(--theme-accent) 20%, transparent);
  --iv-glow: color-mix(in srgb, var(--theme-accent) 5%, transparent);
}

/* Light-mode override: force dark palette since overlay bg is always dark */
body:not(.dark-mode) .iv-toolbar,
body:not(.dark-mode) .iv-anno-bar,
body:not(.dark-mode) .iv-minimap,
body:not(.dark-mode) .iv-info-panel,
body:not(.dark-mode) .iv-export-panel,
body:not(.dark-mode) .iv-anno-guide {
  --iv-bg: color-mix(in srgb, #121212 92%, transparent);
  --iv-bg-solid: #121212;
  --iv-surface: #2a2a2a;
  --iv-border: #444;
  --iv-fg: #e0e0e0;
  --iv-text: #e0e0e0;
  --iv-muted: #888;
  --iv-btn-bg: color-mix(in srgb, var(--theme-accent) 4%, transparent);
  --iv-btn-hover-bg: color-mix(in srgb, var(--theme-accent) 8%, transparent);
  --iv-btn-hover-border: color-mix(in srgb, var(--theme-accent) 40%, #444);
  --iv-btn-hover-text: color-mix(in srgb, var(--theme-accent) 70%, #e0e0e0);
  --iv-active-bg: color-mix(in srgb, var(--theme-accent) 14%, transparent);
  --iv-active-glow: color-mix(in srgb, var(--theme-accent) 20%, transparent);
  --iv-glow: color-mix(in srgb, var(--theme-accent) 5%, transparent);
}

/* --- Hide old UI elements when image viewer is active --- */
.iv-fullscreen #returnButton,
.iv-fullscreen .fullscreen-info,
.iv-fullscreen .fullscreen-edit-btn,
.iv-fullscreen .image-controls {
  display: none !important;
}

/* Expand image area to fill viewport minus toolbar */
.iv-fullscreen #fullscreenContent {
  top: 0;
  left: 0;
  transform: none;
  width: 100%;
  height: calc(100% - 52px);
}

.iv-fullscreen #fullscreenViewerWrap {
  width: 100% !important;
  height: 100% !important;
  max-width: 100% !important;
  max-height: 100% !important;
}

.iv-fullscreen #fullscreenViewer {
  width: 100% !important;
  height: 100% !important;
  max-width: 100% !important;
  max-height: 100% !important;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.iv-fullscreen #fullscreenViewer img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transform-origin: center center;
  user-select: none;
  -webkit-user-select: none;
}

/* Narrower nav areas when image viewer is active */
.iv-fullscreen .fullscreen-nav {
  width: 60px;
  background: transparent;
}

.iv-fullscreen #prevNav:hover {
  background: linear-gradient(to right, rgba(0,0,0,0.3), transparent);
}

.iv-fullscreen #nextNav:hover {
  background: linear-gradient(to left, rgba(0,0,0,0.3), transparent);
}

/* ================================================================
   Bottom Toolbar
   ================================================================ */
.iv-toolbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 52px;
  background: var(--iv-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--iv-border);
  box-shadow: 0 -1px 10px var(--iv-glow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: calc(var(--z-fullscreen) + 3);
  gap: 8px;
  user-select: none;
  -webkit-user-select: none;
  font-family: 'Courier New', Courier, monospace;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.iv-toolbar.iv-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}

/* Toolbar sections */
.iv-toolbar-left,
.iv-toolbar-center,
.iv-toolbar-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.iv-toolbar-left {
  flex: 0 1 auto;
  min-width: 0;
  overflow: hidden;
}

.iv-toolbar-center {
  flex: 1 1 auto;
  justify-content: center;
}

.iv-toolbar-right {
  flex: 0 0 auto;
}

/* ================================================================
   Buttons
   ================================================================ */
.iv-btn {
  background: var(--iv-btn-bg);
  border: 1px solid var(--iv-border);
  color: var(--iv-muted);
  width: 36px;
  height: 36px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: background 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s;
  flex-shrink: 0;
  padding: 0;
}

.iv-btn:hover {
  background: var(--iv-btn-hover-bg);
  border-color: var(--iv-btn-hover-border);
  color: var(--iv-btn-hover-text);
}

.iv-btn.iv-active {
  background: var(--iv-active-bg);
  border-color: var(--iv-accent);
  color: var(--iv-accent);
  box-shadow: 0 0 8px var(--iv-active-glow);
}

.iv-btn:disabled {
  opacity: 0.25;
  cursor: default;
  pointer-events: none;
}

/* Text buttons (Fit, 100%) */
.iv-btn-text {
  width: auto;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  font-family: 'Courier New', Courier, monospace;
}

/* ================================================================
   Zoom Slider
   ================================================================ */
.iv-zoom-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.iv-zoom-slider-wrap {
  width: 120px;
  display: flex;
  align-items: center;
}

.iv-zoom-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: var(--iv-border);
  border-radius: 1px;
  outline: none;
  cursor: pointer;
}

.iv-zoom-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--iv-accent);
  cursor: pointer;
  box-shadow: 0 0 6px var(--iv-active-glow);
}

.iv-zoom-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--iv-accent);
  cursor: pointer;
  box-shadow: 0 0 6px var(--iv-active-glow);
  border: none;
}

.iv-zoom-label {
  font-size: 12px;
  color: var(--iv-muted);
  min-width: 42px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  font-family: 'Courier New', Courier, monospace;
}

/* ================================================================
   Divider
   ================================================================ */
.iv-divider {
  width: 1px;
  height: 24px;
  background: var(--iv-border);
  margin: 0 4px;
  flex-shrink: 0;
}

/* ================================================================
   Filename & Dimensions
   ================================================================ */
.iv-filename {
  font-size: 13px;
  color: var(--iv-accent);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: 'Courier New', Courier, monospace;
  text-shadow: 0 0 6px var(--iv-active-glow);
}

.iv-dimensions {
  font-size: 11px;
  color: var(--iv-muted);
  white-space: nowrap;
  font-family: 'Courier New', Courier, monospace;
}

/* ================================================================
   Navigation Counter
   ================================================================ */
.iv-nav-counter {
  font-size: 12px;
  color: var(--iv-muted);
  min-width: 48px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  font-family: 'Courier New', Courier, monospace;
}

/* ================================================================
   Mini-Map
   ================================================================ */
.iv-minimap {
  position: fixed;
  bottom: 68px;
  right: 16px;
  width: 160px;
  background: color-mix(in srgb, var(--iv-bg-solid) 85%, transparent);
  border: 1px solid var(--iv-border);
  border-radius: 4px;
  overflow: hidden;
  z-index: calc(var(--z-fullscreen) + 3);
  transition: opacity 0.2s;
  box-shadow: 0 0 8px var(--iv-glow);
}

.iv-minimap-canvas {
  display: block;
  width: 100%;
}

.iv-minimap-viewport {
  position: absolute;
  border: 2px solid var(--iv-accent);
  background: color-mix(in srgb, var(--iv-accent) 8%, transparent);
  pointer-events: auto;
  cursor: move;
  box-sizing: border-box;
}

/* ================================================================
   Info Panel
   ================================================================ */
.iv-info-panel {
  position: fixed;
  bottom: 60px;
  left: 16px;
  width: 280px;
  background: color-mix(in srgb, var(--iv-bg-solid) 95%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 6px;
  border: 1px solid var(--iv-border);
  z-index: calc(var(--z-fullscreen) + 4);
  padding: 12px 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4), 0 0 10px var(--iv-glow);
  animation: iv-slide-up 0.2s ease-out;
  font-family: 'Courier New', Courier, monospace;
}

.iv-info-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  font-size: 12px;
  border-bottom: 1px solid var(--iv-glow);
}

.iv-info-row:last-child {
  border-bottom: none;
}

.iv-info-row span:first-child {
  color: var(--iv-muted);
  flex-shrink: 0;
}

.iv-info-row span:last-child {
  color: var(--iv-accent);
  text-align: right;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ================================================================
   Export Panel
   ================================================================ */
.iv-export-panel {
  position: fixed;
  bottom: 60px;
  right: 16px;
  width: 320px;
  background: color-mix(in srgb, var(--iv-bg-solid) 95%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 6px;
  border: 1px solid var(--iv-border);
  z-index: calc(var(--z-fullscreen) + 4);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5), 0 0 10px var(--iv-glow);
  overflow: hidden;
  animation: iv-slide-up 0.2s ease-out;
  font-family: 'Courier New', Courier, monospace;
}

.iv-export-header {
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--iv-border);
  font-weight: 600;
  font-size: 14px;
  color: var(--iv-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.iv-export-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.iv-export-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.iv-export-row > label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--iv-muted);
  font-weight: 500;
}

.iv-export-formats,
.iv-export-sizes {
  display: flex;
  gap: 6px;
}

.iv-export-fmt,
.iv-export-size {
  padding: 6px 14px;
  border-radius: 4px;
  border: 1px solid var(--iv-border);
  background: var(--iv-btn-bg);
  color: var(--iv-muted);
  cursor: pointer;
  font-size: 12px;
  font-family: 'Courier New', Courier, monospace;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.iv-export-fmt:hover,
.iv-export-size:hover {
  background: var(--iv-btn-hover-bg);
  border-color: var(--iv-btn-hover-border);
  color: var(--iv-btn-hover-text);
}

.iv-export-fmt.iv-active,
.iv-export-size.iv-active {
  background: var(--iv-active-bg);
  color: var(--iv-accent);
  border-color: var(--iv-accent);
  box-shadow: 0 0 6px var(--iv-active-glow);
}

.iv-quality-row {
  flex-direction: row;
  align-items: center;
}

.iv-quality-row label {
  flex-shrink: 0;
  margin-right: 8px;
}

.iv-quality-slider {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 2px;
  background: var(--iv-border);
  border-radius: 1px;
  outline: none;
  cursor: pointer;
}

.iv-quality-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--iv-accent);
  cursor: pointer;
  box-shadow: 0 0 6px var(--iv-active-glow);
}

.iv-quality-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--iv-accent);
  border: none;
  cursor: pointer;
  box-shadow: 0 0 6px var(--iv-active-glow);
}

.iv-quality-value {
  font-size: 12px;
  color: var(--iv-muted);
  min-width: 34px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.iv-export-custom-size {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
}

.iv-export-custom-size input[type="number"] {
  width: 80px;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--iv-border);
  background: var(--iv-btn-bg);
  color: var(--iv-accent);
  font-size: 12px;
  font-family: 'Courier New', Courier, monospace;
}

.iv-export-custom-size span {
  color: var(--iv-muted);
  font-size: 12px;
}

.iv-export-custom-size label {
  font-size: 11px;
  color: var(--iv-muted);
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  white-space: nowrap;
}

.iv-export-include-annotations label {
  font-size: 12px;
  color: var(--iv-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.iv-export-actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.iv-export-actions .iv-btn {
  width: auto;
  height: 36px;
  padding: 0 14px;
  font-size: 13px;
  gap: 6px;
  flex: 1;
  font-family: 'Courier New', Courier, monospace;
}

.iv-export-actions .iv-btn i {
  font-size: 12px;
}

.iv-export-download {
  background: var(--iv-active-bg) !important;
  color: var(--iv-accent) !important;
  border-color: var(--iv-accent) !important;
  box-shadow: 0 0 8px var(--iv-active-glow) !important;
}

.iv-export-download:hover {
  background: var(--iv-active-glow) !important;
}

/* ================================================================
   Annotation Toolbar
   ================================================================ */
.iv-anno-bar {
  position: fixed;
  bottom: 52px;
  left: 0;
  right: 0;
  background: var(--iv-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--iv-border);
  box-shadow: 0 -1px 8px var(--iv-glow);
  z-index: calc(var(--z-fullscreen) + 4);
  font-family: 'Courier New', Courier, monospace;
  user-select: none;
  -webkit-user-select: none;
  display: none;
}

.iv-anno-bar--enter {
  animation: iv-anno-slide-up 0.2s ease-out;
}

/* Header row */
.iv-anno-bar__header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 12px 0;
  height: 14px;
}

.iv-anno-bar__status-light {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--iv-accent);
  box-shadow: 0 0 4px var(--iv-accent);
  animation: iv-anno-blink 2s ease-in-out infinite;
}

.iv-anno-bar__title {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--iv-muted);
}

/* Body row */
.iv-anno-bar__body {
  display: flex;
  align-items: center;
  padding: 4px 12px 6px;
  gap: 4px;
}

.iv-anno-bar__section {
  display: flex;
  align-items: center;
  gap: 3px;
}

.iv-anno-bar__options {
  gap: 6px;
}

.iv-anno-bar__divider {
  width: 1px;
  height: 24px;
  background: var(--iv-border);
  margin: 0 4px;
  flex-shrink: 0;
}

/* Tool buttons */
.iv-anno-tool {
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 4px;
  background: var(--iv-btn-bg);
  border: 1px solid var(--iv-border);
  color: var(--iv-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  padding: 0;
  transition: border-color 0.15s, color 0.15s, background 0.15s, box-shadow 0.15s;
}

.iv-anno-tool:hover {
  border-color: var(--iv-btn-hover-border);
  color: var(--iv-btn-hover-text);
  background: var(--iv-btn-hover-bg);
}

.iv-anno-tool--active {
  background: var(--iv-active-bg);
  border-color: var(--iv-accent);
  color: var(--iv-accent);
  box-shadow: 0 0 8px var(--iv-active-glow);
}

.iv-anno-tool--active:hover {
  background: color-mix(in srgb, var(--iv-accent) 16%, transparent);
  color: var(--iv-accent);
}

/* Keyboard shortcut hint */
.iv-anno-tool__key {
  position: absolute;
  bottom: 1px;
  right: 2px;
  font-size: 8px;
  line-height: 1;
  color: color-mix(in srgb, var(--iv-accent) 40%, var(--iv-bg-solid));
  font-family: 'Courier New', Courier, monospace;
  pointer-events: none;
}

/* Toggle buttons (fill/stroke) */
.iv-anno-toggle {
  width: 30px;
  height: 30px;
  border-radius: 4px;
  background: transparent;
  border: 1px solid var(--iv-border);
  color: var(--iv-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  padding: 0;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.iv-anno-toggle:hover {
  border-color: var(--iv-btn-hover-border);
  color: var(--iv-btn-hover-text);
}

.iv-anno-toggle--active {
  background: color-mix(in srgb, var(--iv-accent) 10%, transparent);
  border-color: var(--iv-accent);
  color: var(--iv-accent);
}

/* Color swatches */
.iv-anno-color-swatches {
  display: flex;
  gap: 4px;
  align-items: center;
}

.iv-anno-color-swatch {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
  flex-shrink: 0;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.2);
}

.iv-anno-color-swatch:hover {
  transform: scale(1.2);
}

.iv-anno-color-swatch--active {
  border-color: var(--iv-text);
  box-shadow: 0 0 6px color-mix(in srgb, var(--iv-text) 40%, transparent);
}

/* Custom color picker */
.iv-anno-color-custom {
  width: 22px;
  height: 22px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  padding: 0;
  background: none;
}

.iv-anno-color-custom::-webkit-color-swatch-wrapper {
  padding: 0;
}

.iv-anno-color-custom::-webkit-color-swatch {
  border: 1px solid var(--iv-border);
  border-radius: 3px;
}

/* Stroke width slider */
.iv-anno-slider-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.iv-anno-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 70px;
  height: 2px;
  background: var(--iv-border);
  border-radius: 1px;
  outline: none;
  cursor: pointer;
}

.iv-anno-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--iv-accent);
  cursor: pointer;
  box-shadow: 0 0 6px var(--iv-active-glow);
}

.iv-anno-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--iv-accent);
  border: none;
  cursor: pointer;
  box-shadow: 0 0 6px var(--iv-active-glow);
}

.iv-anno-slider__value {
  font-size: 11px;
  color: var(--iv-muted);
  min-width: 28px;
  font-family: 'Courier New', Courier, monospace;
  font-variant-numeric: tabular-nums;
}

/* Inline text editor */
.iv-anno-text-input {
  position: fixed;
  z-index: calc(var(--z-fullscreen) + 10);
  font-family: 'Courier New', Courier, monospace;
  font-weight: bold;
  background: rgba(0, 0, 0, 0.6);
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid color-mix(in srgb, var(--theme-accent) 30%, transparent);
  outline: none;
  min-width: 40px;
  max-width: 400px;
  white-space: pre;
  caret-color: var(--theme-accent);
  line-height: 1.2;
}

/* ================================================================
   Annotation Canvas
   ================================================================ */
.iv-annotation-canvas {
  position: absolute;
  top: 0;
  left: 0;
  z-index: calc(var(--z-fullscreen) + 2);
  pointer-events: none;
}

.iv-annotation-canvas.iv-drawing {
  pointer-events: auto;
  cursor: crosshair;
}

/* ================================================================
   Checkerboard background for transparency
   ================================================================ */
.iv-bg-checker #fullscreenViewer {
  background-image:
    linear-gradient(45deg, #333 25%, transparent 25%),
    linear-gradient(-45deg, #333 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #333 75%),
    linear-gradient(-45deg, transparent 75%, #333 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

body:not(.dark-mode) .iv-bg-checker #fullscreenViewer {
  background-image:
    linear-gradient(45deg, #ccc 25%, transparent 25%),
    linear-gradient(-45deg, #ccc 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ccc 75%),
    linear-gradient(-45deg, transparent 75%, #ccc 75%);
}

/* ================================================================
   Annotation Guide Panel
   ================================================================ */
.iv-anno-guide {
  position: fixed;
  bottom: 100px;
  right: 16px;
  width: 340px;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
  background: color-mix(in srgb, var(--iv-bg-solid) 95%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 6px;
  border: 1px solid var(--iv-border);
  z-index: calc(var(--z-fullscreen) + 5);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4), 0 0 10px var(--iv-glow);
  animation: iv-slide-up 0.2s ease-out;
  font-family: 'Courier New', Courier, monospace;
}

.iv-anno-guide__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--iv-border);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--iv-muted);
}

.iv-anno-guide__close {
  background: none;
  border: none;
  color: var(--iv-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

.iv-anno-guide__close:hover {
  color: var(--iv-accent);
}

.iv-anno-guide__body {
  padding: 10px 14px 14px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--iv-fg, #ccc);
}

.iv-anno-guide__body p {
  margin: 0 0 8px;
}

.iv-anno-guide__body h3 {
  margin: 10px 0 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--iv-accent);
}

.iv-anno-guide__body ul {
  margin: 4px 0 8px;
  padding-left: 16px;
}

.iv-anno-guide__body li {
  margin: 2px 0;
}

.iv-anno-guide__shortcuts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin-bottom: 8px;
}

.iv-anno-guide__shortcuts span {
  font-size: 11px;
  white-space: nowrap;
}

.iv-anno-guide kbd {
  display: inline-block;
  padding: 1px 5px;
  font-size: 10px;
  font-family: 'Courier New', monospace;
  background: var(--iv-btn-bg);
  border: 1px solid var(--iv-border);
  border-radius: 3px;
  color: var(--iv-accent);
  min-width: 16px;
  text-align: center;
}

/* ================================================================
   Animations
   ================================================================ */
@keyframes iv-slide-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes iv-anno-slide-up {
  from {
    opacity: 0;
    transform: translateY(48px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes iv-anno-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}