:root {
    --bg-dark: #0f1115;
    --bg-panel: rgba(30, 34, 42, 0.85);
    --bg-accent: #2a2f3a;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --text-main: #e2e8f0;
    --text-dim: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
    --glass: backdrop-filter: blur(12px);
    --sidebar-width: 80px;
    --right-panel-width: 300px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--bg-accent);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-dim);
}

#app {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Header */
.app-header {
    height: 56px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 100;
    backdrop-filter: blur(8px);
}

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

.logo h1 {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.top-menu {
    display: flex;
    gap: 12px;
}

.btn-icon {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--bg-panel);
    min-width: 140px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.5);
    z-index: 1000;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 8px 0;
    right: 0;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.btn-filter {
    color: var(--text-main);
    padding: 8px 16px;
    text-decoration: none;
    display: block;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-size: 13px;
    transition: background 0.2s;
}

.btn-filter:hover {
    background: var(--bg-accent);
}

.btn-toggle-small {
    background: var(--bg-accent);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-toggle-small.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
}

.btn-icon:hover {
    background: var(--bg-accent);
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0 20px;
    height: 36px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

/* Editor Sub Header (Undo/Redo, Brush Size) */
.editor-sub-header {
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    padding: 6px 15px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 200;
    backdrop-filter: blur(5px);
    overflow-x: auto;
    scrollbar-width: none; /* Hide scrollbar Firefox */
}

.editor-sub-header::-webkit-scrollbar {
    display: none; /* Hide scrollbar Chrome/Safari */
}

.sub-header-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.history-controls {
    display: flex;
    gap: 8px;
}

.sub-header-divider {
    width: 1px;
    height: 16px;
    background: var(--border-color);
    flex-shrink: 0;
}

.brush-select {
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
}

.label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.current-tool-display {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
    background: var(--bg-accent);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    white-space: nowrap;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}

#current-tool-name {
    color: var(--primary);
    margin-left: 6px;
    text-shadow: 0 0 8px rgba(99, 102, 241, 0.4);
}

/* Icon Sprite Base - Now more specific to avoid global pencil icons */
.tool-btn::before, .btn-icon.has-sprite::before, .tool-btn-small.has-sprite::before, .btn-small.has-sprite::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 24px;
    background-image: url('assets/icons_sprite.png');
    background-size: 600% 600%;
    background-repeat: no-repeat;
    pointer-events: none;
}

/* Specific button overrides */
.btn-icon#btn-mobile-menu::before {
    content: none; /* Disable sprite for mobile menu button itself as it has ☰ text or use a class */
}

/* Specific Positions (6x6 Grid) */
/* Row 0 */
.tool-btn[data-tool="pen"]::before { background-position: 0% 0%; }
.tool-btn[data-tool="neon"]::before { background-position: 20% 0%; }
.tool-btn[data-tool="airbrush"]::before { background-position: 40% 0%; }
.tool-btn[data-tool="eraser"]::before { background-position: 60% 0%; }
.tool-btn[data-tool="bucket"]::before { background-position: 80% 0%; }
.tool-btn[data-tool="picker"]::before { background-position: 100% 0%; }

/* Row 1 */
.tool-btn[data-tool="move"]::before { background-position: 0% 20%; }
.tool-btn[data-tool="selection-rect"]::before { background-position: 20% 20%; }
.tool-btn[data-tool="selection-circle"]::before { background-position: 40% 20%; }
.tool-btn[data-tool="selection-lasso"]::before { background-position: 60% 20%; }
.tool-btn[data-tool="selection-wand"]::before { background-position: 80% 20%; }
.tool-btn[data-tool="line"]::before { background-position: 100% 20%; }

/* Row 2 */
.tool-btn[data-tool="rect"]::before { background-position: 0% 40%; }
.tool-btn[data-tool="circle"]::before { background-position: 20% 40%; }
.tool-btn[data-tool="dodge"]::before { background-position: 40% 40%; }
.tool-btn[data-tool="burn"]::before { background-position: 60% 40%; }
.tool-btn[data-tool="rotate"]::before { background-position: 80% 40%; }
.tool-btn[data-tool="scale"]::before { background-position: 100% 40%; }

/* UI Buttons Row 3 */
#btn-undo::before { background-position: 0% 60%; }
#btn-redo::before { background-position: 20% 60%; }
#btn-new::before { background-position: 40% 60%; }
#btn-open::before { background-position: 60% 60%; }
#btn-save::before { background-position: 80% 60%; }
/* Removed #btn-export-trigger icon as requested */

/* Special Helpers Row 4 */
#btn-rotate-ccw::before { background-position: 80% 40%; width: 20px; height: 20px; }
#btn-rotate-cw::before { background-position: 100% 40%; width: 20px; height: 20px; }
#btn-sym-v::before { background-position: 0% 80%; width: 20px; height: 20px; }
#btn-sym-h::before { background-position: 20% 80%; width: 20px; height: 20px; }
#btn-onion-skin::before { background-position: 40% 80%; width: 20px; height: 20px; }
#btn-duplicate-frame::before { background-position: 60% 80%; width: 20px; height: 20px; }
#btn-add-frame::before { background-position: 80% 80%; width: 20px; height: 20px; }
.btn-reorder-prev::before { background-position: 0% 100%; width: 16px; height: 16px; }
.btn-reorder-next::before { background-position: 20% 100%; width: 16px; height: 16px; }
#btn-play::before { background-position: 40% 100%; }
#btn-play.playing::before { background-position: 60% 100%; }
/* Main Content */
.app-content {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.sidebar {
    background: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 15px 0;
    z-index: 50;
}

.tools-sidebar {
    width: var(--sidebar-width);
    align-items: center;
    gap: 15px;
    position: relative;
}

.tool-options {
    background: var(--bg-accent);
    padding: 8px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    width: 60px;
}

.tool-options select {
    width: 100%;
    background: var(--bg-dark);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px;
    font-size: 0.8rem;
    outline: none;
}

.tool-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    align-items: center;
}

.tool-divider {
    width: 60%;
    height: 1px;
    background: var(--border-color);
    margin: 4px 0;
}

.tool-btn {
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.tool-btn:hover {
    background: var(--bg-accent);
}

.tool-btn.active {
    background: var(--primary);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.color-section {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.symmetry-controls {
    display: flex;
    gap: 8px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.tool-btn-small {
    width: 32px;
    height: 32px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    transition: all 0.2s;
}

.tool-btn-small:hover {
    color: var(--text-main);
    background: var(--bg-accent);
}

.tool-btn-small.active {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
    color: var(--primary);
}

.color-preview {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: #fff;
    border: 2px solid #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

#color-input {
    width: 0;
    height: 0;
    visibility: hidden;
    position: absolute;
}

.palette-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    padding: 0 10px;
}

.palette-color {
    aspect-ratio: 1/1;
    border-radius: 4px;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

/* Editor Viewport */
.editor-viewport {
    flex: 1;
    background-color: #1a1e26;
    background-image: radial-gradient(circle at 1px 1px, #2a2d36 1px, transparent 0);
    background-size: 32px 32px;
    display: block; /* Change from flex to block for absolute transform positioning */
    position: relative;
    overflow: hidden;
    touch-action: none;
}

.canvas-container {
    background-color: white;
    background-image:
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(-45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f0f0f0 75%),
        linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    position: absolute; /* Use absolute for reliable manual transform */
    top: 0;
    left: 0;
    box-shadow: var(--shadow-lg);
    cursor: crosshair;
    image-rendering: pixelated;
    transition: none; /* Disable transition to prevent getBoundingClientRect lag */
    transform-origin: 0 0;
}

.canvas-container canvas {
    position: absolute;
    top: 0;
    left: 0;
    image-rendering: pixelated;
}

#grid-canvas {
    pointer-events: none;
}

/* Right Sidebar */
.right-sidebar {
    width: var(--right-panel-width);
    border-left: 1px solid var(--border-color);
    padding: 0;
    border-right: none;
}

.panel {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.panel h3 {
    font-size: 0.9rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.frames-list {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 10px;
}

.frame-thumb {
    flex: 0 0 60px;
    height: 60px;
    background: #fff;
    border-radius: 6px;
    border: 2px solid transparent;
    cursor: pointer;
    overflow: hidden;
    position: relative;
}

/* 並び替えボタンのスタイリング */
.frame-reorder-controls {
    position: absolute;
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 4px;
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 20;
}

.frame-thumb.reorder-mode .frame-reorder-controls {
    opacity: 1;
    pointer-events: auto;
    bottom: 15px;
}

.frame-thumb.reorder-mode::after {
    content: "並べ替え中";
    position: absolute;
    top: 2px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    font-size: 8px;
    padding: 1px 4px;
    border-radius: 2px;
    pointer-events: none;
    white-space: nowrap;
}

.frame-reorder-controls button {
    background: var(--primary);
    border: 1px solid var(--primary-light);
    border-radius: 4px;
    color: white;
    cursor: pointer;
    font-size: 14px;
    padding: 4px 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.frame-reorder-controls button:active {
    transform: scale(0.9);
}

.mobile-close-btn {
    display: none;
}

.frame-thumb.active {
    border-color: var(--primary);
}

.frame-thumb canvas {
    width: 100%;
    height: 100%;
}

.anim-preview-container {
    margin-top: 20px;
    background: var(--bg-accent);
    border-radius: 12px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

#preview-canvas {
    width: 128px;
    height: 128px;
    background: white;
    border-radius: 8px;
    image-rendering: pixelated;
}

.anim-controls {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
}

#anim-speed {
    flex: 1;
}

/* Layers Panel */
.layers-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 200px;
    overflow-y: auto;
}

.layer-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    background: var(--bg-accent);
    border-radius: 4px;
    cursor: pointer;
    border: 1px solid transparent;
    user-select: none;
}

.layer-item.active {
    background: var(--primary);
    border-color: var(--primary-light);
}

.layer-item.clipping-mask {
    margin-left: 15px;
    border-left: 3px solid var(--primary-light);
}

.layer-item.group-child {
    margin-left: 20px;
    border-left: 2px solid var(--border-color);
}

.layer-info {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    overflow: hidden;
}

.layer-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.85rem;
}

.layer-visibility {
    cursor: pointer;
    opacity: 0.7;
}

.layer-visibility:hover {
    opacity: 1;
}

.layer-controls {
    display: flex;
    gap: 4px;
}

.layer-controls button {
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.layer-controls button:hover {
    color: var(--text-main);
    background: var(--bg-dark);
}

.layer-properties {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 10px;
    padding: 10px;
    background: var(--bg-dark);
    border-radius: 6px;
    font-size: 0.8rem;
}

.opacity-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

.opacity-icon {
    font-size: 0.9rem;
    color: var(--text-dim);
}

#layer-opacity {
    flex: 1;
    height: 4px;
    border-radius: 2px;
    appearance: none;
    background: var(--bg-accent);
}
#layer-opacity::-webkit-slider-thumb {
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
}

#layer-blend-mode {
    width: 100%;
    font-size: 0.8rem;
}

.clipping-control {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.8rem;
    color: var(--text-main);
    cursor: pointer;
    margin-top: 5px;
}

.advanced-layer-actions {
    display: flex;
    gap: 5px;
    margin-top: 5px;
    border-top: 1px solid var(--border-color);
    padding-top: 10px;
}

.advanced-layer-actions .btn-small {
    flex: 1;
    font-size: 0.75rem;
    padding: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
}

/* Filter Panel */
.filter-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.filter-controls select {
    flex: 1;
}

/* Footer */
.app-footer {
    height: 48px;
    background: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    font-size: 0.8rem;
    color: var(--text-dim);
    z-index: 100;
}

.status-bar {
    display: flex;
    gap: 20px;
}

#ai-command-center {
    display: flex;
    gap: 10px;
}

#ai-input {
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0 15px;
    border-radius: 20px;
    width: 300px;
    height: 32px;
    transition: all 0.2s ease;
}

#ai-input:focus {
    width: 450px;
    outline: none;
    border-color: var(--primary);
}

#btn-ai-generate {
    background: linear-gradient(135deg, #6366f1, #a855f7);
    color: white;
    border: none;
    padding: 0 15px;
    border-radius: 16px;
    font-weight: 600;
    font-size: 0.75rem;
    cursor: pointer;
}

/* Utility */
.hidden {
    display: none;
}

.setting-item {
    margin-top: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

select,
input[type="text"] {
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 4px 8px;
    border-radius: 4px;
}

.btn-small {
    padding: 2px 8px;
    border-radius: 4px;
    cursor: pointer;
}

/* --- Mobile Responsiveness --- */

.mobile-only {
    display: none;
}

@media (max-width: 768px) {
    .mobile-only {
        display: flex;
    }

    #ai-command-center {
        display: none !important;
    }

    /* Header adjustments */
    .app-header {
        padding: 0 10px;
    }
    
    .logo h1 {
        font-size: 1rem;
    }
    
    .btn-icon {
        width: 32px;
        height: 32px;
    }
    
    .btn-primary {
        padding: 0 10px;
        font-size: 0.85rem;
    }

    /* Main Content Layout */
    .app-content {
        flex-direction: column;
        height: calc(100vh - 56px - 48px); /* minus header and footer */
        position: relative;
    }

    /* Tools Sidebar -> Bottom Navigation */
    .tools-sidebar {
        width: 100%;
        height: auto;
        flex-direction: row;
        justify-content: space-between;
        padding: 10px 15px;
        position: absolute;
        bottom: 0;
        left: 0;
        z-index: 150;
        border-right: none;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.5);
    }
    
    .tool-group {
        flex-direction: row;
        gap: 8px;
        overflow-x: auto;
        padding-bottom: 5px;
        padding-right: 20px; /* 余白を持たせて最後のツールまで見やすく */
        -webkit-overflow-scrolling: touch;
    }
    
    .tool-group::-webkit-scrollbar {
        height: 0px; /* hide scrollbar for horizontal swipe */
    }
    
    .tool-btn {
        width: 40px;
        height: 40px;
        flex-shrink: 0;
    }

    .color-section {
        display: flex;
        align-items: center;
        padding-left: 10px;
        margin-top: 0; /* Align within toolbar */
        padding-bottom: 5px; /* Push slightly up to avoid being buried */
    }

    #current-color-preview-small {
        display: flex;
        width: 36px;
        height: 36px;
        border-radius: 8px;
        margin-bottom: 5px; /* Lift up */
    }

    .tool-divider {
        width: 1px;
        height: 24px;
        background: var(--border-color);
        margin: 0 4px;
        flex-shrink: 0;
    }

    .symmetry-controls {
        display: none; /* Hide on mobile to save space */
    }

    .tool-btn-small {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }

    /* Editor Viewport */
    .editor-viewport {
        height: calc(100% - 60px); /* minus bottom toolbar space */
        padding: 10px;
    }
    
    /* Right Sidebar -> Overlay Panel */
    .right-sidebar {
        position: absolute;
        top: 0;
        right: -300px;
        height: 100%;
        width: 280px;
        z-index: 500; /* Above everything including navigator */
        background: var(--bg-dark);
        border-left: 1px solid var(--border-color);
        box-shadow: -5px 0 25px rgba(0,0,0,0.8);
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        display: flex;
        flex-direction: column;
        overflow-y: auto;
    }
    
    .right-sidebar.open {
        right: 0;
    }

    .panel {
        padding: 15px;
    }

    /* Mobile Color Access Separation */
    .mobile-close-btn {
        display: block;
        position: absolute;
        top: 10px;
        right: 15px;
        background: none;
        border: none;
        color: var(--text-dim);
        font-size: 24px;
        cursor: pointer;
        z-index: 10;
        padding: 5px;
    }

    .color-panel {
        display: none; /* Hide in default hamburger menu on mobile */
    }

    .right-sidebar.color-only-mode .color-panel {
        display: flex; /* Show only when color-only mode is active */
    }

    .right-sidebar.color-only-mode .panel:not(.color-panel) {
        display: none; /* Hide other panels in color-only mode */
    }

    /* Footer / Status Bar */
    .app-footer {
        height: auto;
        padding: 10px;
        flex-direction: column;
        gap: 8px;
        align-items: stretch;
        z-index: 100;
    }

    .status-bar {
        justify-content: space-between;
    }

    #ai-command-center {
        width: 100%;
    }

    #ai-input {
        width: 100%;
    }

    #ai-input:focus {
        width: 100%;
    }
}

/* --- Navigator & Zoom Styles --- */
.navigator-container {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 120px;
    height: 120px;
    background: var(--bg-panel);
    border: 2px solid var(--primary);
    border-radius: 8px;
    z-index: 300;
    overflow: hidden;
    cursor: grab;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
}

#navigator-canvas {
    max-width: 100%;
    max-height: 100%;
    image-rendering: pixelated;
    background: white;
}

.navigator-view-box {
    position: absolute;
    border: 2px solid #ff4757;
    background: rgba(255, 71, 87, 0.1);
    pointer-events: none;
    box-sizing: border-box;
    z-index: 301;
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-accent);
    padding: 2px 8px;
    border-radius: 20px;
}

.zoom-controls button {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 0.8rem;
}

#zoom-display {
    min-width: 45px;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
}

@media (max-width: 768px) {
    .navigator-container {
        border: 1px solid var(--border-color);
        border-radius: 4px;
        padding: 1px 4px;
        top: 10px; /* Moved up to avoid blocking canvas center */
        right: 15px;
        width: 100px;
        height: 100px;
    }
}

/* --- Color Picker Custom UI --- */
.color-picker-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 10px;
}

.sv-picker {
    position: relative;
    width: 100%;
    aspect-ratio: 1/1;
    background: red;
    border-radius: 4px;
    cursor: crosshair;
    overflow: hidden;
}

.sv-white, .sv-black {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.sv-white {
    background: linear-gradient(to right, #fff, rgba(255,255,255,0));
}

.sv-black {
    background: linear-gradient(to top, #000, rgba(0,0,0,0));
}

.sv-cursor {
    position: absolute;
    width: 10px;
    height: 10px;
    border: 2px solid white;
    border-radius: 50%;
    box-shadow: 0 0 2px rgba(0,0,0,0.5);
    pointer-events: none;
    transform: translate(-50%, -50%);
}

.hue-slider-container {
    width: 100%;
    height: 12px;
    position: relative;
    border-radius: 6px;
    background: linear-gradient(to right, #f00 0%, #ff0 17%, #0f0 33%, #0ff 50%, #00f 67%, #f0f 83%, #f00 100%);
    cursor: pointer;
}

.hue-cursor {
    position: absolute;
    top: -2px;
    width: 4px;
    height: 16px;
    background: white;
    border: 1px solid #000;
    border-radius: 2px;
    transform: translateX(-50%);
    pointer-events: none;
}

.palette-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 10px 0 5px;
}

.palette-section-header h4 {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
}

.palette-select {
    font-size: 0.75rem;
    background: var(--bg-dark);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1px 4px;
}

.history-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
    padding: 5px 0;
}

.history-color {
    aspect-ratio: 1/1;
    border-radius: 2px;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    display: none;
    opacity: 0;
}

.modal-content {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: modal-pop 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modal-pop {
    from { transform: scale(0.95) translateY(10px); opacity: 0; }
    to { transform: scale(1) translateY(0); opacity: 1; }
}

.modal-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-body {
    padding: 20px;
}

.export-options-grid {
    display: grid;
    gap: 12px;
    margin-bottom: 20px;
}

.export-option-card {
    background: var(--bg-accent);
    border: 2px solid transparent;
    border-radius: 12px;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.export-option-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
}

.export-option-card.selected {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary);
}

.option-icon {
    font-size: 1.8rem;
}

.option-info h4 {
    margin: 0 0 4px 0;
    font-size: 1rem;
}

.option-info p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.export-settings {
    background: var(--bg-accent);
    padding: 15px;
    border-radius: 12px;
}

.export-settings .setting-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.export-settings input {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 12px;
    border-radius: 6px;
    outline: none;
}

.export-settings input:focus {
    border-color: var(--primary);
}

.modal-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

/* Custom Alert Modal Styles */
.alert-modal-content {
    max-width: 400px;
    background: rgba(30, 31, 45, 0.8) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay:not(.hidden) .alert-modal-content {
    transform: scale(1);
}

.alert-modal-content .modal-header {
    border-bottom: none;
    padding-bottom: 0;
}

.alert-modal-content .modal-footer {
    border-top: none;
    padding-top: 0;
    gap: 12px;
}

#alert-message {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-main);
}

/* Selection UI & Utility */
.hidden { display: none !important; }

.selection-only {
    display: flex;
    align-items: center;
    animation: slideInTop 0.2s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

@keyframes slideInTop {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

#btn-deselect {
    background: #ff3b30;
    color: white;
    font-weight: 700;
    font-size: 11px;
    padding: 6px 14px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(255, 59, 48, 0.4);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 6px;
}

#btn-deselect::before {
    content: "✕";
    font-size: 14px;
}

#btn-deselect:hover {
    background: #ff453a;
    box-shadow: 0 6px 16px rgba(255, 59, 48, 0.5);
    transform: translateY(-1px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}

/* --- Landing Page (For Non-Logged Users) --- */
.landing-page {
    min-height: 100vh;
    background: radial-gradient(circle at 50% 50%, #1f2937 0%, #0f172a 100%);
    color: #f8fafc;
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
}

.landing-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 80px 10%;
    min-height: 80vh;
    gap: 40px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.1;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #94a3b8;
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-image-placeholder {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
}

.mock-editor {
    width: 500px;
    height: 400px;
    background: #1a1b26;
    border-radius: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.mock-canvas {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjAiIGhlaWdodD0iMjAiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PHJlY3Qgd2lkdGg9IjEwIiBoZWlnaHQ9IjEwIiBmaWxsPSJyZ2JhKDI1NSwyNTUsMjU1LDAuMDUpIi8+PHJlY3QgeD0iMTAiIHk9IjEwIiB3aWR0aD0iMTAiIGhlaWdodD0iMTAiIGZpbGw9InJnYmEoMjU1LDI1NSwyNTUsMC4wNSkiLz48L3N2Zz4=');
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.mock-ui-floating {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--accent-main);
    color: white;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 700;
    box-shadow: 0 10px 20px rgba(58, 123, 213, 0.3);
}

/* Features */
.features {
    padding: 100px 10%;
    background: rgba(15, 23, 42, 0.3);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-5px);
    border-color: var(--accent-main);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-card h4 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.feature-card p {
    color: #94a3b8;
    line-height: 1.6;
}

/* CTA */
.bottom-cta {
    text-align: center;
    padding: 120px 10%;
    background: linear-gradient(to bottom, transparent, rgba(58, 123, 213, 0.1));
}

.bottom-cta h3 {
    font-size: 2.5rem;
    margin-bottom: 24px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
    font-weight: 700;
}

.landing-footer {
    text-align: center;
    padding: 40px;
    color: #64748b;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        padding-top: 40px;
        text-align: center;
    }
    .hero-title { font-size: 2.5rem; }
    .mock-editor { width: 90vw; height: 300px; }
    .cta-buttons { flex-direction: column; }
}

.mobile-hide { display: initial; }

/* --- Mobile Portrait Refinements (Premium UI) --- */
@media (max-width: 500px) {
    .mobile-hide { display: none !important; }
    .mobile-only { display: block !important; }
    
    .mobile-actions-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 10px;
    }

    .btn-icon-text {
        display: flex;
        align-items: center;
        gap: 10px;
        width: 100%;
        text-align: left;
    }

    .app-header {
        padding: 8px 12px;
        height: 50px;
    }

    .logo h1 { font-size: 1.1rem; }
    
    .editor-sub-header {
        padding: 5px 10px;
        gap: 8px;
        justify-content: space-between;
    }

    .sub-header-divider { margin: 0 2px; }
    
    .current-tool-display {
        font-size: 11px;
        padding: 4px 8px;
    }

    .brush-select {
        height: 28px;
        padding: 2px 4px;
        font-size: 11px;
    }

    .btn-toggle-small {
        padding: 3px 6px;
        font-size: 10px;
        min-width: 24px;
    }

    /* Glassmorphism Panels */
    .app-header, .editor-sub-header, .status-bar, .sidebar, .right-sidebar {
        background: rgba(26, 27, 38, 0.8) !important;
        backdrop-filter: blur(12px) !important;
        -webkit-backdrop-filter: blur(12px) !important;
        border-color: rgba(255, 255, 255, 0.1) !important;
    }


    /* Bottom tools (sidebar on mobile) */
    .tools-sidebar {
        height: 70px !important;
        padding: 0 10px !important;
    }

    .tool-group {
        gap: 12px !important;
    }

    .tool-btn {
        width: 36px !important;
        height: 36px !important;
    }

    /* Status Bar */
    .status-bar {
        height: 40px;
        padding: 0 10px;
        font-size: 10px;
    }

    .zoom-controls {
        gap: 10px;
    }

    .zoom-controls .btn-small {
        width: 24px;
        height: 24px;
        font-size: 14px;
    }
}