: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: 100px;
    --right-panel-width: 340px;
}
@media screen and (min-width: 1025px) {
    :root {
        --sidebar-width: 100px !important;
        --right-panel-width: 360px !important;
    }
    .app-header {
        height: 64px !important;
    }
    .sidebar.tools-sidebar {
        width: var(--sidebar-width) !important;
        padding: 10px 5px !important;
    }
    .tool-group {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px !important;
        padding: 0 4px !important;
    }
    .tool-btn {
        width: 42px !important;
        height: 42px !important;
        border-radius: 8px;
    }
    .tool-divider {
        grid-column: span 2;
        width: 100%;
        height: 1px;
        margin: 6px 0;
        background: var(--border-color);
    }
    #current-color-preview-small {
        width: 60px !important;
        height: 60px !important;
    }
    /* Right Sidebar PC Optimization */
    .right-sidebar {
        height: calc(100vh - 64px);
    }
    .right-sidebar .panel {
        border-bottom: 1px solid var(--border-color);
    }
    .right-sidebar .color-panel {
        flex-shrink: 0;
        border-bottom: 2px solid var(--primary);
    }
}
.right-sidebar-scroll-area {
    flex-grow: 1;
    overflow-y: auto;
    overflow-x: hidden;
}
@media (max-width: 768px) {
    .right-sidebar-scroll-area {
        display: block;
        overflow-y: visible;
        flex: none;
    }
}
* {
    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;
    height: 100dvh;
    min-height: -webkit-fill-available;
    display: flex;
    flex-direction: column;
}
::-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%;
}
.app-layout {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    flex: 1;
    overflow: hidden;
}
.app-header {
    height: 64px;
    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: 1.5rem;
    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: 44px;
    height: 44px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}
.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, .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    padding: 0 20px;
    height: 38px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    white-space: nowrap;
}
.btn-primary {
    background: var(--primary);
    color: white !important;
}
.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}
button:disabled {
    opacity: 0.4 !important;
    cursor: not-allowed !important;
    filter: grayscale(1) brightness(0.7);
    pointer-events: none;
}
.gradient-editor-preview {
    width: 200px;
    height: 18px;
    background: linear-gradient(to right, #000, #fff);
    border-radius: 4px;
    position: relative;
    border: 1px solid var(--border-color);
    margin: 0 10px;
    cursor: copy;
}
.gradient-stop-marker {
    position: absolute;
    top: -5px;
    width: 14px;
    height: 28px;
    background: white;
    border: 1.5px solid #000;
    transform: translateX(-50%);
    cursor: ew-resize;
    z-index: 5;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.8), 0 2px 5px rgba(0,0,0,0.4);
    border-radius: 2px;
    touch-action: none;
}
.gradient-stop-marker.active {
    border: 2px solid var(--primary);
    z-index: 10;
    box-shadow: 0 0 8px var(--primary);
}
.gradient-stop-delete {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 18px;
    background: #ef4444;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.2);
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    pointer-events: auto;
}
.gradient-stop-marker:hover .gradient-stop-delete,
.gradient-stop-marker.active .gradient-stop-delete {
    opacity: 1;
}
.gradient-stop-delete:hover {
    background: #dc2626;
    transform: translateX(-50%) scale(1.1);
}
.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;
}
.editor-sub-header::-webkit-scrollbar {
    display: none; 
}
.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);
}
.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;
}
.btn-icon#btn-mobile-menu::before {
    content: "\2630";
}
.tool-btn[data-tool="pen"]::before { background-position: 0% 0%; }
.tool-btn[data-tool="dither"]::before { 
    background-image: none; 
    content: "\25A6"; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-size: 20px; 
    color: var(--text-main); 
}
.tool-btn[data-tool="gradient"]::before {
    background-image: none;
    content: "";
    width: 22px;
    height: 16px;
    background: linear-gradient(to bottom, 
        #ff3b30 0% 16.6%, 
        #ff9500 16.6% 33.3%, 
        #ffcc00 33.3% 50%, 
        #4cd964 50% 66.6%, 
        #007aff 66.6% 83.3%, 
        #5856d6 83.3% 100%
    );
    border-radius: 2px;
    border: 1px solid rgba(0,0,0,0.3);
    box-shadow: 1px 1px 0 rgba(255,255,255,0.1);
}
.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%; }
.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%; }
.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%; }
#btn-flip-h::before, #btn-flip-v::before, #btn-transform-free::before {
    background-image: none;
    background-repeat: no-repeat;
    background-size: 20px 20px;
    background-position: center;
    width: 24px;
    height: 24px;
}
#btn-flip-h::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 7l-5 5 5 5'/%3E%3Cpath d='M16 7l5 5-5 5'/%3E%3Cline x1='12' y1='4' x2='12' y2='20'/%3E%3C/svg%3E");
}
#btn-flip-v::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M7 8l5-5 5 5'/%3E%3Cpath d='M7 16l5 5 5-5'/%3E%3Cline x1='4' y1='12' x2='20' y2='12'/%3E%3C/svg%3E");
}
#btn-transform-free::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='4' y='4' width='16' height='16' rx='2'/%3E%3Crect x='2' y='2' width='4' height='4'/%3E%3Crect x='18' y='2' width='4' height='4'/%3E%3Crect x='18' y='18' width='4' height='4'/%3E%3Crect x='2' y='18' width='4' height='4'/%3E%3C/svg%3E");
}
#btn-dot-calc::before {
    content: none;
}
.setting-item-stack {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 10px;
}
.radio-container {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-main);
    user-select: none;
}
.radio-container input {
    cursor: pointer;
    accent-color: var(--primary);
}
#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%; }
#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%; }
.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: 54px;
    height: 54px;
    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;
}
.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);
}
.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-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 {
    flex: 1;
    background-color: #1a1e26;
    background-image: radial-gradient(circle at 1px 1px, #2a2d36 1px, transparent 0);
    background-size: 32px 32px;
    display: block;
    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;
    top: 0;
    left: 0;
    box-shadow: var(--shadow-lg);
    cursor: crosshair;
    image-rendering: pixelated;
    transition: none;
    transform-origin: 0 0;
    overflow: visible;
    touch-action: none;
}

#main-canvas, #grid-canvas {
    touch-action: none;
}
.tile-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
    display: none;
}
.seamless-active .tile-grid-overlay {
    display: block;
    outline: 2px dashed rgba(79, 70, 229, 0.5);
    outline-offset: -1px;
}
.canvas-container canvas {
    position: absolute;
    top: 0;
    left: 0;
    image-rendering: pixelated;
}
#grid-canvas {
    pointer-events: none;
}
.right-sidebar {
    width: var(--right-panel-width);
    border-left: 1px solid var(--border-color);
    padding: 0;
    border-right: none;
    display: flex;
    flex-direction: column;
}
.right-sidebar-scroll-area {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}
@media (max-width: 768px) {
    .right-sidebar-scroll-area {
        overflow-y: visible;
        display: block;
        flex: none;
    }
}
.panel {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    overflow-x: hidden;
}
.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;
    max-width: 100%;
    width: calc(var(--right-panel-width) - 40px); 
}
.frame-thumb {
    flex: 0 0 60px;
    height: 60px;
    background: #fff;
    border-radius: 6px;
    border: 2px solid transparent;
    cursor: pointer;
    overflow: hidden;
    position: relative;
}
.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: "荳ｦ縺ｹ譖ｿ縺井ｸｭ";
    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;
}
.animation-controls, .layer-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}
.animation-controls button, .layer-actions button {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 6px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    transition: all 0.2s;
}
.animation-controls button:hover, .layer-actions button:hover {
    background: var(--primary-light);
    border-color: var(--primary);
}
.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-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;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.layer-visibility::before {
    content: "\2741";
}
.layer-visibility:not(.visible)::before {
    content: "\2716";
}
.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;
}
.navigator-container {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 150px;
    height: 150px;
    aspect-ratio: 1 / 1; 
    box-sizing: border-box; 
    background: #000;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    z-index: 100;
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    cursor: grab;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}
#navigator-canvas {
    width: 100% !important;
    height: 100% !important;
    object-fit: fill !important; 
    image-rendering: pixelated;
    display: block;
}
.navigator-view-box {
    position: absolute;
    border: 2px solid #ff3b30;
    box-shadow: 0 0 10px rgba(255, 59, 48, 0.5);
    pointer-events: none;
    box-sizing: border-box;
    z-index: 101;
    left: 0;
    top: 0;
}
@media screen and (max-width: 768px) {
    .right-sidebar.active {
        display: flex !important;
        transform: translateX(0);
    }
    .right-sidebar.color-only-mode .panel:not(.color-panel) {
        display: none;
    }
    .right-sidebar.color-only-mode .color-panel {
        height: 100%;
        display: flex;
        flex-direction: column;
        padding-top: 10px;
    }
    .color-picker-container {
        flex: 0 0 auto;
        padding: 5px 0;
    }
    .palette-section {
        flex: 1;
        overflow-y: auto;
        padding-bottom: 20px;
    }
    .sv-picker {
        height: 140px;
    }
}
.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-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}
.filter-controls select {
    flex: 1;
}
.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;
}
.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-only {
    display: none;
}
@media (max-width: 768px) {
    .mobile-only {
        display: flex;
    }
    #ai-command-center {
        display: none !important;
    }
    .app-header {
        padding: 0 10px;
    }
    .editor-sub-header {
        flex-wrap: wrap !important;
        height: auto !important;
        min-height: 42px;
        padding: 5px 10px !important;
        margin-bottom: 4px;
    }
    .logo h1 {
        font-size: 1rem;
    }
    .btn-icon {
        width: 32px;
        height: 32px;
    }
    .btn-primary {
        padding: 0 10px;
        font-size: 0.85rem;
    }
    .app-content {
        flex-direction: column;
        flex: 1;
        min-height: 0;
        position: relative;
    }
    .sidebar.tools-sidebar {
        width: 100% !important;
        height: auto !important;
        flex-direction: row !important;
        display: flex !important;
        justify-content: space-between !important;
        padding: 4px 15px !important;
        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-divider {
        width: 1px !important;
        height: 24px !important;
        background: var(--border-color) !important;
        margin: 0 4px !important;
        flex-shrink: 0 !important;
        align-self: center !important;
    }
    .sidebar.tools-sidebar .tool-group {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        gap: 12px !important;
        align-items: center !important;
        overflow-x: auto !important;
        padding-bottom: 5px;
        padding-right: 20px; 
        -webkit-overflow-scrolling: touch;
    }
    .tool-group::-webkit-scrollbar {
        height: 0px; 
    }
    .tool-btn {
        width: 34px !important;
        height: 34px !important;
        flex-shrink: 0;
    }
    .sidebar.tools-sidebar .color-section {
        display: flex !important;
        align-items: center !important;
        padding-left: 10px !important;
        margin-top: 0 !important;
        padding-bottom: 5px !important;
        width: auto !important;
        justify-content: flex-end !important;
        flex-shrink: 0 !important;
    }
    #current-color-preview-small {
        display: flex;
        width: 36px;
        height: 36px;
        border-radius: 8px;
        margin-bottom: 5px; 
    }
    .tool-divider {
        width: 1px;
        height: 24px;
        background: var(--border-color);
        margin: 0 4px;
        flex-shrink: 0;
    }
    .symmetry-controls {
        display: none; 
    }
    .tool-btn-small {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }
    .editor-viewport {
        height: calc(100% - 60px); 
        padding: 10px;
    }
    .right-sidebar {
        position: absolute;
        top: 0;
        right: -100%;
        height: 100% !important;
        padding-bottom: 20px !important;
        width: 280px;
        z-index: 500;
        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);
        overflow-y: auto;
        z-index: 2000; 
    }
    .right-sidebar.active {
        right: 0;
        display: flex !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    .panel {
        padding: 15px;
    }
    .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: flex;
        flex-direction: column;
    }
    .right-sidebar.color-only-mode .panel:not(.color-panel) {
        display: none !important;
    }
    .right-sidebar:not(.color-only-mode) .color-panel {
        display: none !important;
    }
    .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-container {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 120px;
    height: 120px;
    aspect-ratio: 1 / 1;
    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 {
    width: 100%;
    height: 100%;
    object-fit: contain;
    image-rendering: pixelated;
    background: white;
}
.navigator-view-box {
    position: absolute;
    border: 2px solid #ff4757;
    background: transparent;
    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; 
        right: 15px;
        width: 100px;
        height: 100px;
    }
}
.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;
}
.color-numeric-inputs {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
    padding: 0 5px;
}
.numeric-input-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.numeric-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.numeric-input-group label {
    font-size: 11px;
    color: var(--text-dim);
    font-weight: bold;
}
.numeric-input-group input[type="number"] {
    width: 50px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 4px;
    padding: 1px 4px;
    font-size: 11px;
    font-family: 'JetBrains Mono', monospace;
    text-align: right;
}
.color-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
    margin: 4px 0;
}
.color-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 4px rgba(0,0,0,0.3);
    border: 2px solid white;
}
.color-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 4px rgba(0,0,0,0.3);
    border: 2px solid white;
}
.numeric-input-group input[type="number"]::-webkit-inner-spin-button,
.numeric-input-group input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.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 {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 4px;
    padding: 2px 4px;
    font-size: 11px;
}

/* Gradient Editor Improvements */
.gradient-editor-preview {
    position: relative;
    width: 150px;
    height: 18px;
    border-radius: 4px;
    border: 1px solid rgba(255,255,255,0.2);
    cursor: crosshair;
}
.gradient-stop-marker {
    position: absolute;
    top: -4px;
    width: 12px;
    height: 24px;
    border: 2px solid #fff;
    border-radius: 2px;
    transform: translateX(-50%);
    cursor: grab;
    box-shadow: 0 0 4px rgba(0,0,0,0.5);
    z-index: 5;
}
.gradient-stop-marker.active {
    border-color: var(--primary);
    z-index: 6;
    transform: translateX(-50%) scale(1.1);
}
.gradient-stop-delete {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 14px;
    height: 14px;
    background: #ff4757;
    color: #fff;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    line-height: 1;
    cursor: pointer;
    border: 1px solid rgba(255,255,255,0.5);
}
.gradient-stop-marker:hover .gradient-stop-delete,
.gradient-stop-marker.active .gradient-stop-delete {
    display: flex;
}
.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 {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4); 
    backdrop-filter: blur(4px);    
    display: flex;
    align-items: flex-start;
    justify-content: center;
    z-index: 5000;
    transition: opacity 0.3s ease;
    padding: 20px 10px;
    overflow-y: auto;
    pointer-events: auto; 
}
.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);
    pointer-events: auto; 
}
@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 {
    border-color: var(--primary);
    background: rgba(108, 92, 231, 0.1);
}
.export-option-card.frame-thumb.active {
    border-color: var(--primary);
    background: rgba(108, 92, 231, 0.2);
}
.frame-thumb.moving-source {
    border-color: #f1c40f;
    box-shadow: 0 0 15px rgba(241, 196, 15, 0.5);
    animation: pulse-move 1.5s infinite;
    z-index: 10;
}
@keyframes pulse-move {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.05); }
    100% { opacity: 1; transform: scale(1); }
}
.export-section {
    padding: 10px 0;
}
.section-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}
.section-divider {
    height: 1px;
    background: var(--border-color);
    margin: 25px 0;
    position: relative;
}
.export-settings-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 15px;
}
.export-field {
    margin-bottom: 15px;
}
.export-field label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}
.section-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 20px;
}
.share-btn-gradient {
    background: var(--gradient-primary) !important;
    color: white !important;
    border: none !important;
    font-weight: 700 !important;
    padding: 12px 24px !important;
    border-radius: 8px !important;
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.3);
}
.share-btn-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(108, 92, 231, 0.4);
}
.modal-footer.hidden {
    display: none;
}
#export-share-message {
    width: 100%;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    color: var(--text-main);
    font-size: 1rem;
    line-height: 1.5;
    resize: vertical;
    min-height: 100px;
    transition: border-color 0.2s;
}
#export-share-message:focus {
    outline: none;
    border-color: var(--primary);
}
@media (max-width: 500px) {
    .export-settings-row {
        grid-template-columns: 1fr;
    }
    .section-actions button {
        width: 100%;
    }
}
.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;
    line-height: 1.4;
}

/* Color Replace / HSB Adjustment Modal */
.replace-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 20px 0;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: bold;
}
.replace-divider::before, .replace-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}
.replace-divider span {
    padding: 0 10px;
}
.replace-hsb-section {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 15px;
    border: 1px solid var(--border-color);
}
.replace-hsb-section h4 {
    margin: 0 0 12px 0;
    font-size: 0.9rem;
    color: var(--primary-light);
}
.hsb-controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 15px;
}
.hsb-control-item {
    display: grid;
    grid-template-columns: 80px 1fr 45px;
    align-items: center;
    gap: 10px;
}
.hsb-control-item label {
    font-size: 0.8rem;
    color: var(--text-dim);
}
.hsb-val {
    font-size: 0.8rem;
    font-family: 'JetBrains Mono', monospace;
    text-align: right;
    color: var(--text-main);
}
#btn-reset-hsb {
    width: 100%;
    padding: 6px;
    font-size: 0.8rem;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
}
#btn-reset-hsb:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}
.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;
}
.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);
}
.hidden { display: none !important; }
.selection-only {
    display: flex;
    align-items: center;
    animation: fadeInSelection 0.3s ease-out;
    flex-shrink: 0;
}
@keyframes fadeInSelection {
    from { opacity: 0; transform: translateX(-5px); }
    to { opacity: 1; transform: translateX(0); }
}
.btn-clear-selection {
    background: #ef4444;
    color: white;
    font-weight: 700;
    font-size: 11px;
    padding: 6px 12px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(239, 68, 68, 0.2);
    transition: all 0.2s ease;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}
.btn-clear-selection::before {
    font-size: 13px;
    line-height: 1;
}
#btn-select-all::before { content: "\25FB"; }
#btn-copy::before { content: "\1F4CB"; }
#btn-cut::before { content: "\2702"; }
#btn-paste::before { content: "\1F4E5"; }
#btn-deselect::before { content: "\1F6AB"; }

/* Toggle icons restoration via HEX */
.btn-toggle-small { display: flex; align-items: center; justify-content: center; gap: 4px; }
#btn-color-mode-toggle::before { content: "\1F504"; }

/* 狭い画面でのサブヘッダー最適化 */
@media (max-width: 700px) {
    .btn-clear-selection span,
    .btn-toggle-small:not(#btn-pp):not(#btn-seamless):not(#btn-replace-color):not(#btn-sym-v):not(#btn-sym-h) span {
        display: none;
    }
    .btn-clear-selection,
    .btn-toggle-small {
        padding: 8px;
        min-width: 34px;
        height: 34px;
        justify-content: center;
    }
    /* 繝・く繧ｹ繝医ｒ陦ｨ遉ｺ縺吶ｋ繝懊ち繝ｳ縺ｯ讓ｪ蟷・ｒ蜿ｯ螟峨↓ */
    #btn-pp, #btn-seamless, #btn-replace-color {
        width: auto;
        padding: 0 8px;
    }
    .btn-clear-selection::before,
    .btn-toggle-small::before {
        font-size: 16px;
    }
    .editor-sub-header {
        padding: 4px 8px;
        gap: 6px;
    }
    .sub-header-group {
        gap: 4px;
    }
    .current-tool-display {
        padding: 4px 8px;
        font-size: 11px;
    }
    .sub-header-divider {
        margin: 0 2px;
    }
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}
.badge {
    background: var(--primary);
    color: white !important;
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: 4px;
    display: inline-block;
    vertical-align: middle;
    margin-left: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    line-height: 1;
}
.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;
    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 {
    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;
}
.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: 0 48px;
    height: 60px;
    font-size: 1.15rem;
    font-weight: 800;
    border-radius: 14px;
}
.landing-footer {
    text-align: center;
    padding: 40px;
    color: #64748b;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}
@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; }
@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;
    }
    .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;
    }
    .right-sidebar.color-only-mode .mobile-actions-panel {
        display: none !important;
    }
    .tools-sidebar {
        height: 70px !important;
        padding: 0 10px !important;
    }
    .sidebar.tools-sidebar .tool-group {
        display: flex !important;
        flex-wrap: nowrap !important;
        align-items: center !important;
        gap: 12px !important;
    }
    .tool-btn {
        width: 36px !important;
    }
    .floating-selection-controls {
        bottom: 85px;
    }
    .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;
    }
    .right-sidebar {
        width: 100% !important; 
        right: -100% !important;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 20px;
    }
    .right-sidebar.active {
        right: 0 !important;
    }
    .color-panel {
        padding: 5px !important;
    }
    .color-picker-container {
        display: grid !important;
        grid-template-columns: 1fr 1.2fr !important; 
        gap: 12px !important;
        padding: 10px !important;
        align-items: start;
    }
    .sv-picker {
        grid-column: 1;
        grid-row: 1;
        height: 140px !important;
        width: 100% !important;
        aspect-ratio: auto !important;
    }
    .hue-slider-container {
        grid-column: 1;
        grid-row: 2;
        margin-top: 5px;
    }
    .picker-outputs {
        grid-column: 1;
        grid-row: 3;
        margin-top: 5px;
        flex-direction: column !important;
        gap: 8px !important;
    }
    .hex-input-group {
        width: 100% !important;
    }
    .current-color-preview {
        width: 100% !important;
        height: 30px !important;
    }
    .color-numeric-inputs {
        grid-column: 2;
        grid-row: 1 / span 3; 
        display: flex !important;
        flex-direction: column !important;
        gap: 4px !important;
        margin-top: 0 !important;
    }
    .numeric-input-group {
        gap: 1px !important;
    }
    .numeric-label-row {
        margin-bottom: 0px;
    }
    .numeric-input-group label {
        font-size: 10px !important;
    }
    .numeric-input-group input[type="number"] {
        height: 24px;
        padding: 0 4px;
        width: 45px !important;
    }
    .palette-section {
        margin-top: 10px !important;
    }
    .palette-grid, .history-grid {
        gap: 4px !important;
        grid-template-columns: repeat(10, 1fr) !important;
    }
}
.transform-controls {
    display: flex;
    gap: 4px;
    margin: 0 10px;
    padding-left: 10px;
    border-left: 1px solid var(--border-color);
}
.calc-group {
    margin-bottom: 15px;
}
.calc-group label {
    display: block;
    font-size: 11px;
    color: var(--text-dim);
    margin-bottom: 5px;
}
.calc-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
}
.calc-inputs input {
    width: 60px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 4px;
    border-radius: 4px;
    text-align: center;
}
.calc-divider {
    text-align: center;
    margin: 10px 0;
    font-size: 18px;
    color: var(--primary);
}
.calc-result {
    background: rgba(99, 102, 241, 0.1);
    border: 1px dashed var(--primary);
    padding: 10px;
    border-radius: 4px;
    text-align: center;
    font-weight: bold;
    color: var(--primary);
    margin-top: 15px;
}
#calc-ratio {
    font-size: 1.2rem;
}
:root {
    --handle-color: #ffffff;
    --handle-border: #4f46e5;
}
@media (max-width: 500px) {
    .transform-controls {
        margin: 0 5px;
        padding-left: 5px;
    }
}
.replace-modal-content {
    max-width: 400px;
}
.replace-color-selectors {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 15px;
}
.color-select-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}
.color-preview-box {
    width: 60px;
    height: 60px;
    background-color: #000;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    transition: transform 0.2s, border-color 0.2s;
}
.color-preview-box:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
}
.color-preview-box.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.4);
    transform: scale(1.1);
    animation: pulse-active 2s infinite;
}
@keyframes pulse-active {
    0% { box-shadow: 0 0 0 0px rgba(99, 102, 241, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(99, 102, 241, 0); }
    100% { box-shadow: 0 0 0 0px rgba(99, 102, 241, 0); }
}
.replace-arrow {
    font-size: 24px;
    color: var(--text-dim);
}
.replace-hint {
    text-align: center;
    font-size: 11px;
    color: var(--text-dim);
    margin-bottom: 20px;
}
.replace-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 15px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
}
.replace-preview-section {
    margin: 15px 0;
    text-align: center;
    background: rgba(0,0,0,0.3);
    padding: 15px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}
.replace-preview-canvas-wrapper {
    width: 128px;
    height: 128px;
    margin: 0 auto 10px;
    background: white;
    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%);
    background-size: 10px 10px;
    background-position: 0 0, 0 5px, 5px -5px, -5px 0px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
#replace-preview-canvas {
    image-rendering: pixelated;
    max-width: 100%;
    max-height: 100%;
}
.replace-preview-hint {
    font-size: 0.75rem;
    color: var(--text-dim);
}
.new-project-modal-content {
    max-width: 500px;
    margin: 5% auto; 
}
.new-project-section {
    margin-bottom: 25px;
}
.modal-section-title {
    font-size: 0.9rem;
    color: var(--text-dim);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.size-options-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr) auto;
    gap: 10px;
    align-items: center;
}
.size-opt-btn {
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 600;
}
.size-opt-btn:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}
.size-opt-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}
.custom-size-opt {
    display: flex;
    align-items: center;
    gap: 5px;
    background: var(--bg-dark);
    padding: 4px 8px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}
.custom-size-opt input {
    width: 60px;
    background: transparent;
    border: none;
    color: var(--text-main);
    text-align: right;
    font-weight: bold;
}
.custom-size-opt input:focus {
    outline: none;
}
.palette-options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.palette-opt-card {
    background: var(--bg-accent);
    border: 2px solid transparent;
    border-radius: 12px;
    padding: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}
.palette-opt-card:hover {
    background: rgba(255, 255, 255, 0.05);
}
.palette-opt-card.active {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}
.palette-opt-name {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
}
.palette-opt-preview {
    height: 12px;
    border-radius: 3px;
    overflow: hidden;
    background: #666;
    pointer-events: none;
}
.retro-preview { background: linear-gradient(to right, #000, #1D2B53, #7E2553, #008751, #AB5236, #5F574F, #C2C3C7, #FFF1E8); }
.gameboy-preview { background: linear-gradient(to right, #0f380f, #306230, #8bac0f, #9bbc0f); }
.win95-preview { background: linear-gradient(to right, #000000, #808080, #ffffff, #c0c0c0, #800000, #ff0000); }
.pastel-preview { background: linear-gradient(to right, #ffb7b2, #ffdac1, #e2f0cb, #b5ead7, #c7ceea); }
.default-preview { background: linear-gradient(to right, #000, #fff, #f00, #0f0, #00f, #ff0); }
.new-project-warning {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
}
.new-project-warning i {
    margin-right: 5px;
}

/* Force Desktop-ish UI when inside Studio regardless of screen size, BUT only if the screen is wide enough */
@media screen and (min-width: 769px) {
    .is-studio .mobile-hide {
        display: flex !important;
    }
    .is-studio .mobile-only, 
    .is-studio .mobile-actions-panel,
    .is-studio .mobile-close-btn {
        display: none !important;
    }
}

.is-studio .history-controls {
    display: flex !important;
}
/* Studio 騾｣謳ｺ逕ｨ霑ｽ蜉�繧ｹ繧ｿ繧､繝ｫ (index.php繧医ｊ遘ｻ陦・ */
.is-studio #canvas-wrapper {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    touch-action: none;
}

.is-studio #grid-canvas {
    z-index: 5;
    pointer-events: none;
    touch-action: none;
}

.is-studio .navigator-container {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 120px;
    height: 120px;
    z-index: 100 !important;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    pointer-events: auto;
}

.is-studio .anim-preview-container {
    width: 100%;
    aspect-ratio: 1;
    background: #111;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.is-studio #preview-canvas {
    max-width: 100%;
    max-height: 100%;
    image-rendering: pixelated;
}

/* Studio 騾｣謳ｺ逕ｨ繝｢繝舌う繝ｫ隱ｿ謨ｴ (繧ｿ繝悶Ξ繝・ヨ遲峨・讓ｪ蟷・′縺ゅｋ蝣ｴ蜷医・縺ｿ) */
@media screen and (min-width: 501px) and (max-width: 768px) {
    .is-studio .app-layout {
        height: 100vh !important;
        height: 100dvh !important;
    }
    .is-studio .app-content {
        flex-direction: row !important;
        flex: 1 !important;
        height: auto !important;
        min-height: 0 !important;
    }
    .is-studio .sidebar.tools-sidebar {
        position: relative !important;
        bottom: auto !important;
        left: auto !important;
        width: 80px !important;
        height: 100% !important;
        flex-direction: column !important;
        padding: 10px 0 !important;
        border-right: 1px solid var(--border-color) !important;
        box-shadow: none !important;
        overflow-y: auto !important;
    }
    .is-studio .sidebar.tools-sidebar .tool-group {
        flex-direction: column !important;
        overflow-x: visible !important;
    }
    .is-studio .tool-btn {
        width: 54px !important;
        height: 54px !important;
    }
    .is-studio .app-footer {
        height: 48px !important;
        flex-direction: row !important;
        padding: 0 15px !important;
    }
    .is-studio .status-bar {
        flex-direction: row !important;
        gap: 15px !important;
        width: 100% !important;

        justify-content: space-between !important;
    }
    .is-studio .editor-viewport {
        height: 100% !important;
    }
}


/* Final Mobile UI Adjustments: Corrected Separation Logic */
@media (max-width: 768px) {
    /* Mode-based Mutual Exclusion */
    
    /* 1. Color-only-mode is ACTIVE (from color icon) */
    .right-sidebar.color-only-mode .panel:not(.color-panel) {
        display: none !important;
    }
    .right-sidebar.color-only-mode .color-panel {
        display: block !important;
        height: auto !important;
    }

    /* 2. Color-only-mode is INACTIVE (from hamburger menu) */
    .right-sidebar:not(.color-only-mode) .color-panel {
        display: none !important;
    }
    .right-sidebar:not(.color-only-mode) .panel:not(.color-panel) {
        display: block !important;
        height: auto !important;
    }

    /* Common Sidebar Fixes */
    .mobile-actions-panel {
        display: block !important;
        height: auto !important;
        min-height: 120px !important;
        overflow: visible !important;
        padding-bottom: 20px !important;
        flex-shrink: 0 !important;
    }

    .mobile-actions-grid {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 12px !important;
        padding: 10px 15px 20px 15px !important;
        background: rgba(0, 0, 0, 0.2) !important;
        border-radius: 0 0 12px 12px !important;
    }

    .btn-icon-text {
        display: flex !important;
        align-items: center !important;
        gap: 15px !important;
        width: 100% !important;
        background: rgba(255, 255, 255, 0.08) !important;
        border: 1px solid var(--border-color) !important;
        color: var(--text-main) !important;
        padding: 16px 20px !important;
        border-radius: 14px !important;
        font-size: 1rem !important;
        font-weight: 500 !important;
        cursor: pointer !important;
        transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
        text-align: left !important;
        margin-bottom: 8px !important;
        box-shadow: 0 4px 10px rgba(0,0,0,0.3) !important;
    }

    .btn-icon-text:active {
        background: var(--primary) !important;
        transform: scale(0.96) !important;
    }

    .btn-icon-text .icon {
        font-size: 1.5rem !important;
        width: 32px !important;
        display: flex !important;
        justify-content: center !important;
    }
    
    .right-sidebar-scroll-area {
        display: flex !important;
        flex-direction: column !important;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch !important;
    }
}

#btn-mobile-menu::before {
    content: "\2630";
}

/* --- アクションパネル（新規・読み込み・保存）のスタイル削除 --- */
/* サイドバーからは削除されたため、ここも整理します */