/* ==========================================================================
   LightTable - Modern Tactile Gallery Styles
   ========================================================================== */

:root {
    --table-bg: #24252a;
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Photo Frame Theming */
    --frame-bg: #ffffff;
    --frame-pad: 8px;
    --frame-radius: 4px;
    --frame-img-radius: 2px;

    /* Shadows */
    --shadow-rest: 0 6px 18px -2px rgba(0, 0, 0, 0.3), 0 2px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 12px 28px -4px rgba(0, 0, 0, 0.4), 0 4px 10px -2px rgba(0, 0, 0, 0.25);
    --shadow-lift: 0 26px 50px -8px rgba(0, 0, 0, 0.55), 0 14px 24px -4px rgba(0, 0, 0, 0.35);
    
    /* Glassmorphism */
    --glass-bg: rgba(22, 23, 29, 0.78);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-glow: 0 16px 40px -8px rgba(0, 0, 0, 0.5);
    
    /* Accents */
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
}

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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
    font-family: var(--font-sans);
    background-color: var(--table-bg);
    color: var(--text-primary);
    transition: background-color 0.4s ease;
    user-select: none;
    -webkit-user-select: none;
}

/* ==========================================================================
   Header Bar
   ========================================================================== */

#app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 50;
    background: rgba(16, 18, 24, 0.72);
    backdrop-filter: blur(18px) saturate(180%);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
    pointer-events: auto;
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 14px;
}

.header-left {
    gap: 18px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0;
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    transform: rotate(180deg);
}

.brand-icon svg {
    width: 20px;
    height: 20px;
}

.brand-title {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #ffffff;
}

.brand-title span {
    font-size: 0.65em;
    vertical-align: super;
    opacity: 0.7;
    margin-left: 2px;
}

/* ==========================================================================
   Custom Glassmorphic Gallery Dropdown
   ========================================================================== */

.custom-dropdown {
    position: relative;
    user-select: none;
}

/* Trigger Button */
.dropdown-trigger {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.11);
    border-radius: 9999px;
    padding: 6px 14px 6px 12px;
    cursor: pointer;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    outline: none;
}

.dropdown-trigger:hover,
.custom-dropdown.open .dropdown-trigger {
    border-color: rgba(255, 255, 255, 0.24);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 0 14px rgba(59, 130, 246, 0.16);
}

.dropdown-trigger:active {
    transform: scale(0.98);
}

.trigger-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.trigger-icon-wrap svg {
    width: 16px;
    height: 16px;
}

.trigger-label {
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    letter-spacing: -0.01em;
}

.trigger-count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1px 7px;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.1);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.dropdown-chevron {
    width: 14px;
    height: 14px;
    color: var(--text-muted);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), color 0.2s;
    margin-left: 2px;
}

.custom-dropdown.open .dropdown-chevron {
    transform: rotate(180deg);
    color: var(--accent);
}

/* Dropdown Menu Popup Panel */
.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 320px;
    background: #14161f;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 16px;
    box-shadow: 0 22px 52px -6px rgba(0, 0, 0, 0.85),
                0 0 0 1px rgba(255, 255, 255, 0.08),
                0 8px 24px rgba(99, 102, 241, 0.12);
    padding: 6px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(0.97);
    pointer-events: none;
    transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                visibility 0.2s;
}

.custom-dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* Header inside dropdown */
.dropdown-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px 6px;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    margin-bottom: 4px;
}

.dropdown-header-count {
    font-weight: 500;
    color: rgba(255, 255, 255, 0.68);
    text-transform: none;
    letter-spacing: 0;
}

/* Dropdown items list */
.dropdown-list {
    max-height: 380px;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-right: 2px;
}

/* Subtle scrollbar */
.dropdown-list::-webkit-scrollbar {
    width: 5px;
}
.dropdown-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 9999px;
}

/* Item row */
.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 9px 12px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid transparent;
    outline: none;
}

.dropdown-item:hover,
.dropdown-item:focus-visible {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateX(2px);
}

.dropdown-item.active {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.35);
}

.dropdown-item.active:hover {
    background: rgba(99, 102, 241, 0.22);
}

.item-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    flex-shrink: 0;
    transition: all 0.2s;
}

.dropdown-item:hover .item-icon-wrap {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.dropdown-item.active .item-icon-wrap {
    background: var(--accent);
    color: #ffffff;
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.5);
}

.item-icon-wrap svg {
    width: 16px;
    height: 16px;
}

.item-text-wrap {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex-grow: 1;
    min-width: 0;
}

.item-title {
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color 0.15s;
}

.dropdown-item.active .item-title {
    color: #ffffff;
    font-weight: 700;
}

.item-subtitle {
    font-size: 0.72rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-check-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    flex-shrink: 0;
}

.item-check-badge svg {
    width: 16px;
    height: 16px;
    stroke-width: 2.5;
}

.item-count-pill {
    padding: 2px 7px;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.09);
    font-size: 0.72rem;
    font-weight: 600;
    color: #cbd5e1;
    flex-shrink: 0;
    transition: all 0.15s;
}

.dropdown-item:hover .item-count-pill {
    background: rgba(255, 255, 255, 0.14);
    color: var(--text-primary);
}

/* Screen-reader utility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Header Right Actions */
.photo-counter-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.11);
    padding: 6px 12px;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.photo-counter-badge svg {
    width: 14px;
    height: 14px;
    color: var(--accent);
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.11);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.icon-btn svg {
    width: 18px;
    height: 18px;
}

.icon-btn:hover {
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.24);
    background: rgba(255, 255, 255, 0.14);
}

.icon-btn:active {
    transform: scale(0.95);
}

/* ==========================================================================
   Main Light Table Workspace & Camera World
   ========================================================================== */

#light-table {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    touch-action: none;
    cursor: default;
}

#light-table.is-panning {
    cursor: grabbing !important;
}

#light-table.space-active {
    cursor: grab;
}

#light-table.space-active.is-panning {
    cursor: grabbing !important;
}

#table-world {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-origin: 0 0;
    will-change: transform;
    pointer-events: none;
    opacity: 1;
    transition: opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

#table-world.is-preloading {
    opacity: 0;
}

#table-world.animate-camera {
    transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   Centered Image Preloader Curtain
   ========================================================================== */

.table-preloader {
    position: fixed;
    inset: 0;
    z-index: 45;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    pointer-events: auto;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.25s;
}

.table-preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-pill {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    max-width: min(440px, calc(100vw - 36px));
    padding: 14px 22px;
    background: #14161f;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 9999px;
    box-shadow: 0 22px 52px -6px rgba(0, 0, 0, 0.78),
                0 0 0 1px rgba(255, 255, 255, 0.06);
}

.preloader-spinner {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    border-radius: 50%;
    border: 2.5px solid rgba(255, 255, 255, 0.14);
    border-top-color: var(--accent);
    animation: preloaderSpin 0.8s linear infinite;
}

@keyframes preloaderSpin {
    to { transform: rotate(360deg); }
}

.preloader-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.preloader-title {
    font-size: 0.86rem;
    font-weight: 700;
    color: #ffffff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.preloader-detail {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: #cbd5e1;
    white-space: nowrap;
}

/* ==========================================================================
   Photo Card Component
   ========================================================================== */

.photo-card {
    position: absolute;
    top: 0;
    left: 0;
    touch-action: none;
    transform-origin: center center;
    cursor: grab;
    contain: layout style;
    pointer-events: auto;
}

.photo-card.is-dragging {
    cursor: grabbing;
}

.photo-card.is-dragging,
.photo-card.animate-layout {
    will-change: transform;
}

.photo-card.animate-layout {
    transition: transform 0.65s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Physical Photo Paper Frame */
.photo-frame {
    position: relative;
    background: var(--frame-bg);
    padding: var(--frame-pad);
    border-radius: var(--frame-radius);
    box-shadow: var(--shadow-rest);
    transition: background-color 0.2s ease, padding 0.12s ease, border-radius 0.2s ease, transform 0.2s ease;
}

/* Hover elevation: hovered card always pops above adjacent cards in stacks or fans */
.photo-card:hover {
    z-index: 99999 !important;
}

.photo-card:hover .photo-frame {
    box-shadow: var(--shadow-hover);
}

.photo-card.is-dragging .photo-frame {
    box-shadow: var(--shadow-lift);
    filter: brightness(1.02);
    transform: scale(1.025);
}

.photo-img-wrap {
    position: relative;
    overflow: hidden;
    border-radius: var(--frame-img-radius);
    background: #1c1e26;
    line-height: 0;
    min-height: 200px;
    transition: border-radius 0.2s ease;
}

.photo-img-wrap.loaded {
    min-height: 0;
}

.photo-img-wrap.is-error {
    min-height: 180px;
}

.photo-img-wrap img {
    display: block;
    width: 100%;
    height: auto;
    pointer-events: none;
    user-select: none;
    transition: opacity 0.25s ease;
}

/* Center Zoom Inspection Button */
.photo-zoom-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.85);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(15, 23, 42, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease, background 0.2s;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.5);
    z-index: 30;
    pointer-events: auto;
}

.photo-zoom-btn svg {
    width: 20px;
    height: 20px;
}

.photo-card:hover .photo-zoom-btn {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.photo-zoom-btn:hover {
    background: var(--accent);
    transform: translate(-50%, -50%) scale(1.1);
}

/* Photo Handles Overlay */
.photo-handles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease;
}

/* Suppress handles on dense/fanned cards until user actively grabs or clicks the card */
.photo-card.is-active .photo-handles,
.photo-card.is-dragging .photo-handles,
.photo-card:not(.is-dense):hover .photo-handles {
    opacity: 1;
}

.photo-card.is-dense:not(.is-active):not(.is-dragging) .rotate-handle,
.photo-card.is-dense:not(.is-active):not(.is-dragging) .scale-handle {
    pointer-events: none;
}

/* Top Rotation Lever Handle */
.rotate-handle {
    position: absolute;
    top: -34px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: auto;
    cursor: grab;
    z-index: 10;
}

.rotate-handle:active {
    cursor: grabbing;
}

.rotate-knob {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: #ffffff;
    border: 2px solid var(--accent);
    color: var(--accent);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.15s, background 0.15s, color 0.15s;
}

.rotate-knob svg {
    width: 14px;
    height: 14px;
}

.rotate-handle:hover .rotate-knob {
    transform: scale(1.15);
    background: var(--accent);
    color: #ffffff;
}

.rotate-lever {
    width: 2px;
    height: 10px;
    background: var(--accent);
    opacity: 0.8;
}

/* Corner Scale Handles */
.scale-handle {
    position: absolute;
    width: 16px;
    height: 16px;
    background: #ffffff;
    border: 2px solid var(--accent);
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    pointer-events: auto;
    transition: transform 0.15s, background 0.15s;
}

.scale-handle:hover {
    transform: scale(1.3);
    background: var(--accent);
}

.handle-tl { top: -6px; left: -6px; cursor: nwse-resize; }
.handle-tr { top: -6px; right: -6px; cursor: nesw-resize; }
.handle-br { bottom: -6px; right: -6px; cursor: nwse-resize; }
.handle-bl { bottom: -6px; left: -6px; cursor: nesw-resize; }

/* ==========================================================================
   Floating Glassmorphic Control Dock
   ========================================================================== */

#controls-dock {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 80;
    pointer-events: auto;
    transition: opacity 0.25s ease;
}

body.is-preloading #controls-dock {
    opacity: 0;
    pointer-events: none;
}

.dock-inner {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 8px;
    background: var(--glass-bg);
    backdrop-filter: blur(18px) saturate(180%);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 9999px;
    box-shadow: var(--glass-glow);
}

.dock-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 9999px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    flex-shrink: 0;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.dock-btn span {
    white-space: nowrap;
}

.dock-btn svg {
    width: 17px;
    height: 17px;
    color: var(--accent-hover);
    transition: transform 0.2s;
}

.dock-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    transform: translateY(-1px);
}

.dock-btn:hover svg {
    transform: scale(1.1);
}

.dock-btn:active {
    transform: scale(0.95);
}

/* Tooltips */
.dock-btn::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: rgba(15, 23, 42, 0.95);
    color: #ffffff;
    font-size: 0.72rem;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 6px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: all 0.15s ease;
}

.dock-btn:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dock-divider {
    width: 1px;
    height: 22px;
    background: rgba(255, 255, 255, 0.15);
    margin: 0 4px;
}

/* Global Camera Zoom Widget */
.dock-zoom-group {
    display: flex;
    align-items: center;
    gap: 2px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 9999px;
    padding: 2px 4px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.dock-btn-icon {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.dock-btn-icon:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    transform: scale(1.08);
}

.dock-btn-icon:active {
    transform: scale(0.92);
}

.dock-btn-icon svg {
    width: 14px;
    height: 14px;
}

.dock-btn-compact {
    position: relative;
    border: none;
    background: transparent;
    padding: 4px 8px;
    border-radius: 6px;
    color: #ffffff;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    min-width: 48px;
    text-align: center;
}

.dock-btn-compact:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--accent-hover);
}

.dock-btn-icon::after,
.dock-btn-compact::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: rgba(15, 23, 42, 0.95);
    color: #ffffff;
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 6px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: all 0.15s ease;
}

.dock-btn-icon:hover::after,
.dock-btn-compact:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ==========================================================================
   Dock Menu Wrappers & Popovers (Arrange & Palette)
   ========================================================================== */

.dock-menu-wrapper {
    position: relative;
}

.dock-chevron {
    width: 14px;
    height: 14px;
    color: var(--text-muted);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), color 0.2s;
    margin-left: 2px;
}

.dock-menu-wrapper.open .dock-chevron {
    transform: rotate(180deg);
    color: var(--accent);
}

.dock-menu-wrapper.open .dock-btn {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
}

/* Arrange Popover Flyout */
.arrange-popover {
    position: absolute;
    bottom: calc(100% + 14px);
    left: 0;
    width: 290px;
    padding: 6px;
    background: #14161f;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 16px;
    box-shadow: 0 22px 52px -6px rgba(0, 0, 0, 0.85),
                0 0 0 1px rgba(255, 255, 255, 0.08),
                0 8px 24px rgba(99, 102, 241, 0.12);
    z-index: 100;
    transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                visibility 0.2s;
}

.arrange-popover.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px) scale(0.97);
    pointer-events: none;
}

.arrange-popover:not(.hidden) {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.popover-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px 6px;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    margin-bottom: 4px;
}

.popover-badge {
    padding: 1px 6px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.09);
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--accent-hover);
    text-transform: uppercase;
}

.popover-options {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.arrange-option-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 7px 10px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    font-family: var(--font-sans);
    transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
    outline: none;
}

.arrange-option-btn:hover,
.arrange-option-btn:focus-visible {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateX(2px);
    color: #ffffff;
}

.arrange-option-btn .option-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--accent);
    flex-shrink: 0;
    transition: all 0.15s;
}

.arrange-option-btn:hover .option-icon {
    background: var(--accent);
    color: #ffffff;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
}

.arrange-option-btn .option-icon svg {
    width: 15px;
    height: 15px;
}

.arrange-option-btn .option-content {
    display: flex;
    flex-direction: column;
    gap: 1px;
    flex-grow: 1;
    min-width: 0;
}

.arrange-option-btn .option-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: #ffffff;
    white-space: nowrap;
}

.arrange-option-btn .option-desc {
    font-size: 0.70rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.arrange-option-btn .shortcut-pill {
    padding: 2px 6px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 0.68rem;
    font-family: monospace;
    font-weight: 600;
    color: var(--text-secondary);
    margin-left: auto;
    flex-shrink: 0;
}

.arrange-option-btn.danger:hover {
    background: rgba(239, 68, 68, 0.14);
    border-color: rgba(239, 68, 68, 0.3);
}

.arrange-option-btn.danger:hover .option-icon {
    background: #ef4444;
    color: #ffffff;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.4);
}

.popover-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.07);
    margin: 4px 6px;
}

/* Theme Swatches Popover */
.palette-menu-wrapper {
    position: relative;
}

.palette-popover {
    position: absolute;
    bottom: calc(100% + 14px);
    left: 50%;
    transform: translateX(-50%);
    width: 290px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 12px 14px;
    background: #14161f;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 16px;
    box-shadow: 0 22px 52px -6px rgba(0, 0, 0, 0.85),
                0 0 0 1px rgba(255, 255, 255, 0.08),
                0 8px 24px rgba(99, 102, 241, 0.12);
    z-index: 100;
    transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                visibility 0.2s;
}

.palette-popover::-webkit-scrollbar {
    width: 4px;
}

.palette-popover::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 9999px;
}

.palette-popover.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(8px) scale(0.97);
    pointer-events: none;
}

.palette-popover:not(.hidden) {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0) scale(1);
    pointer-events: auto;
}

.popover-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.popover-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2px 0 2px;
}

.popover-title {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #cbd5e1;
}

.popover-subtitle {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #cbd5e1;
}

/* Segmented Control */
.segmented-control {
    display: flex;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 9px;
    padding: 3px;
    gap: 3px;
}

.segmented-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px 8px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.74rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.segmented-btn svg {
    width: 13px;
    height: 13px;
}

.segmented-btn:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.08);
}

.segmented-btn.active {
    background: var(--accent);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
}

.frame-color-section {
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: opacity 0.2s ease;
}

.frame-color-section.disabled {
    opacity: 0.35;
    pointer-events: none;
}

.swatches-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 7px;
}

.swatches-grid.frame-swatches {
    grid-template-columns: repeat(6, 1fr);
}

.swatch-btn {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 7px;
    border: 2px solid rgba(255, 255, 255, 0.14);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
    transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.swatch-btn:hover {
    transform: scale(1.1);
    border-color: #ffffff;
}

.swatch-btn.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.4), 0 2px 8px rgba(0, 0, 0, 0.4);
    transform: scale(1.05);
}

.custom-color-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 8px;
    margin-top: 2px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.color-picker-input-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

input[type="color"] {
    appearance: none;
    -webkit-appearance: none;
    border: none;
    width: 26px;
    height: 26px;
    border-radius: 6px;
    cursor: pointer;
    background: transparent;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
}

#customColorHex,
#customFrameColorHex {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: #ffffff;
}

/* Border Weight Slider */
.border-weight-row {
    display: flex;
    flex-direction: column;
    gap: 7px;
    padding-top: 8px;
    margin-top: 2px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

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

.border-weight-val {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    color: #ffffff;
    background: rgba(255, 255, 255, 0.08);
    padding: 1px 7px;
    border-radius: 5px;
}

.theme-range-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 5px;
    background: rgba(255, 255, 255, 0.16);
    border-radius: 9999px;
    outline: none;
    cursor: pointer;
    transition: background 0.2s;
}

.theme-range-slider:hover {
    background: rgba(255, 255, 255, 0.26);
}

.theme-range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid #ffffff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.45);
    cursor: pointer;
    transition: transform 0.15s, background 0.15s;
}

.theme-range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: var(--accent-hover);
}

.theme-range-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid #ffffff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.45);
    cursor: pointer;
    transition: transform 0.15s, background 0.15s;
}

.theme-range-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    background: var(--accent-hover);
}

.palette-popover .popover-divider {
    margin: 10px 0;
}

.theme-reset-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    width: 100%;
    padding: 8px 10px;
    border-radius: 9px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.76rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.18s ease;
}

.theme-reset-btn svg {
    width: 14px;
    height: 14px;
}

.theme-reset-btn:hover {
    background: rgba(239, 68, 68, 0.14);
    border-color: rgba(239, 68, 68, 0.35);
    color: #fca5a5;
}

.theme-reset-btn:active {
    transform: scale(0.98);
}

/* ==========================================================================
   Modern Lightbox Modal
   ========================================================================== */

.lightbox-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.lightbox-modal.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 11, 15, 0.85);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
}

.lightbox-header {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 28px;
}

.lightbox-title-wrap {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.lightbox-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.01em;
}

.lightbox-counter {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

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

.lightbox-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lightbox-btn svg {
    width: 20px;
    height: 20px;
}

.lightbox-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.08);
}

.lightbox-viewport {
    position: relative;
    z-index: 5;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 10px 40px;
    touch-action: none;
    user-select: none;
    cursor: default;
}

.lightbox-viewport.is-zoomed {
    cursor: grab;
}

.lightbox-viewport.is-panning {
    cursor: grabbing !important;
}

.lightbox-image-container {
    display: flex;
    align-items: center;
    justify-content: center;
    transform-origin: center center;
    will-change: transform;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
}

.lightbox-image-container.smooth-transition {
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox-image-container img {
    max-width: calc(100vw - 140px);
    max-height: calc(100vh - 180px);
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 25px 60px -10px rgba(0, 0, 0, 0.7);
    user-select: none;
    -webkit-user-drag: none;
    pointer-events: auto;
}

/* Lightbox Navigation Chevrons */
.lightbox-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 15;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    transition: all 0.2s ease;
}

.lightbox-nav-btn svg {
    width: 26px;
    height: 26px;
}

.lightbox-nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-50%) scale(1.1);
}

.lightbox-nav-btn.prev { left: 24px; }
.lightbox-nav-btn.next { right: 24px; }

/* Lightbox Footer & Floating Pro Inspector Zoom Bar (Pattern C) */
.lightbox-footer {
    position: relative;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px 22px;
    pointer-events: none;
}

.lightbox-zoom-bar {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(18, 20, 27, 0.88);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 9999px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 16px rgba(99, 102, 241, 0.15);
    padding: 6px 12px;
    pointer-events: auto;
    user-select: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.lightbox-zoom-bar:hover {
    border-color: rgba(255, 255, 255, 0.28);
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.6), 0 0 20px rgba(99, 102, 241, 0.25);
}

.lightbox-zoom-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
    outline: none;
}

.lightbox-zoom-btn svg {
    width: 16px;
    height: 16px;
    transition: transform 0.15s;
}

.lightbox-zoom-btn:hover {
    background: rgba(255, 255, 255, 0.14);
    color: #ffffff;
    transform: scale(1.08);
}

.lightbox-zoom-btn:active {
    transform: scale(0.92);
}

/* Slider Wrap */
.lightbox-slider-wrap {
    display: flex;
    align-items: center;
    padding: 0 4px;
}

#lightbox-zoom-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 140px;
    height: 5px;
    background: rgba(255, 255, 255, 0.18);
    border-radius: 9999px;
    outline: none;
    cursor: pointer;
    transition: background 0.2s;
}

#lightbox-zoom-slider:hover {
    background: rgba(255, 255, 255, 0.28);
}

#lightbox-zoom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    cursor: pointer;
    transition: transform 0.15s, background 0.15s;
}

#lightbox-zoom-slider::-webkit-slider-thumb:hover {
    transform: scale(1.25);
    background: var(--accent-hover);
}

#lightbox-zoom-slider::-moz-range-thumb {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    cursor: pointer;
    transition: transform 0.15s, background 0.15s;
}

#lightbox-zoom-slider::-moz-range-thumb:hover {
    transform: scale(1.25);
    background: var(--accent-hover);
}

.lightbox-bar-divider {
    width: 1px;
    height: 18px;
    background: rgba(255, 255, 255, 0.14);
    margin: 0 2px;
}

.lightbox-zoom-btn.fit-btn {
    width: auto;
    padding: 4px 10px;
    border-radius: 9999px;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.lightbox-zoom-btn.fit-btn svg {
    width: 14px;
    height: 14px;
    color: var(--accent);
}

.lightbox-zoom-btn.fit-btn:hover {
    background: rgba(255, 255, 255, 0.14);
    color: #ffffff;
}

/* ==========================================================================
   Help & Shortcuts Modal
   ========================================================================== */

.help-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.help-modal.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.help-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 11, 15, 0.75);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.help-content {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 580px;
    max-height: calc(100vh - 36px);
    overflow-y: auto;
    overscroll-behavior: contain;
    background: rgba(24, 26, 34, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 24px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}

.help-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.help-title-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #ffffff;
}

.help-title-wrap svg {
    color: var(--accent);
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-bottom: 22px;
}

.help-card {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 12px;
}

.help-card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-hover);
    flex-shrink: 0;
}

.help-card-icon svg {
    width: 16px;
    height: 16px;
}

.help-card-text h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 4px;
}

.help-card-text p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.keyboard-shortcuts-table h4 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.shortcut-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    color: var(--text-primary);
}

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

.toast {
    position: fixed;
    top: 72px;
    left: 50%;
    transform: translateX(-50%) translateY(0);
    background: rgba(18, 20, 26, 0.92);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: #ffffff;
    font-size: 0.82rem;
    font-weight: 500;
    padding: 8px 18px;
    border-radius: 9999px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    z-index: 150;
    display: flex;
    align-items: center;
    gap: 8px;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(-10px);
}

.toast-icon {
    width: 15px;
    height: 15px;
    color: #4ade80;
}

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

@media (max-width: 768px) {
    #app-header {
        padding: 0 14px;
    }

    .brand-title {
        display: none;
    }

    .trigger-label {
        max-width: 130px;
    }

    .dropdown-menu {
        left: 0;
        min-width: 270px;
        max-width: calc(100vw - 28px);
    }

    .dock-btn span {
        display: none;
    }

    .dock-btn {
        padding: 10px;
    }

    .dock-menu-wrapper,
    .palette-menu-wrapper {
        position: static;
    }

    .arrange-popover,
    .palette-popover {
        left: 50%;
        width: min(290px, calc(100vw - 24px));
    }

    .arrange-popover:not(.hidden),
    .palette-popover:not(.hidden) {
        transform: translateX(-50%) translateY(0) scale(1);
    }

    .arrange-popover.hidden,
    .palette-popover.hidden {
        transform: translateX(-50%) translateY(8px) scale(0.97);
    }

    .help-grid, .shortcut-list {
        grid-template-columns: 1fr;
    }

    .lightbox-nav-btn.prev { left: 10px; }
    .lightbox-nav-btn.next { right: 10px; }
    .lightbox-viewport { padding: 10px 20px; }
}

/* ==========================================================================
   Lucide Icon Offline & Resilient Fallbacks
   ========================================================================== */
i[data-lucide]:empty {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-style: normal;
    font-size: 14px;
    line-height: 1;
}
i[data-lucide="zoom-in"]:empty::before { content: "🔍"; }
i[data-lucide="zoom-out"]:empty::before { content: "🔍"; }
i[data-lucide="rotate-cw"]:empty::before { content: "↻"; font-weight: bold; }
i[data-lucide="rotate-ccw"]:empty::before { content: "↺"; font-weight: bold; }
i[data-lucide="chevron-left"]:empty::before { content: "❮"; }
i[data-lucide="chevron-right"]:empty::before { content: "❯"; }
i[data-lucide="chevron-down"]:empty::before { content: "▾"; }
i[data-lucide="x"]:empty::before { content: "✕"; }
i[data-lucide="help-circle"]:empty::before { content: "?"; font-weight: bold; }
i[data-lucide="maximize"]:empty::before { content: "⛶"; }
i[data-lucide="minimize"]:empty::before { content: "🗗"; }
i[data-lucide="layout-grid"]:empty::before { content: "⊞"; }
i[data-lucide="shuffle"]:empty::before { content: "⇄"; }
i[data-lucide="focus"]:empty::before { content: "◎"; }
i[data-lucide="palette"]:empty::before { content: "🎨"; }
i[data-lucide="layers"]:empty::before { content: "❖"; }
i[data-lucide="folder-kanban"]:empty::before { content: "📁"; }
i[data-lucide="folder"]:empty::before { content: "📁"; }
i[data-lucide="folder-open"]:empty::before { content: "📂"; }
i[data-lucide="file-code-2"]:empty::before { content: "📄"; }
i[data-lucide="check"]:empty::before { content: "✓"; font-weight: bold; }
i[data-lucide="image"]:empty::before { content: "🖼"; }
i[data-lucide="square"]:empty::before { content: "⬜"; }
i[data-lucide="maximize-2"]:empty::before { content: "⤢"; }