/* Theme Variables - Dark */
.theme-dark {
    --sh-bg-primary: #1a1a1a;
    --sh-bg-secondary: #1e1e1e;
    --sh-bg-tertiary: #252526;
    --sh-bg-toolbar: #2a2a2a;
    --sh-bg-input: #333;
    --sh-bg-hover: #2a2d2e;
    --sh-bg-tab: #2d2d2d;
    --sh-bg-tab-hover: #323232;
    --sh-bg-active: #094771;
    --sh-bg-selection: #264f78;
    --sh-border: #333;
    --sh-border-light: #444;
    --sh-text-primary: #dadbdf;
    --sh-text-secondary: #cccccc;
    --sh-text-muted: #969696;
    --sh-text-disabled: #6e6e6e;
    --sh-text-header: #bbbbbb;
    --sh-accent: #39c;
    --sh-accent-bg: #007acc;
    --sh-error-bg: #c72e2e;
    --sh-icon-shader: #e8ab53;
    --sh-icon-vert: #6a9955;
    --sh-icon-frag: #ce9178;
    --sh-modified-dot: #c5c5c5;
    --sh-canvas-bg: #000;
    /* GLSL Syntax Highlighting */
    --glsl-comment: #6a9955;
    --glsl-preprocessor: #c586c0;
    --glsl-keyword: #569cd6;
    --glsl-type: #4ec9b0;
    --glsl-qualifier: #c586c0;
    --glsl-number: #b5cea8;
    --glsl-string: #ce9178;
    --glsl-function: #dcdcaa;
    --glsl-builtin-var: #9cdcfe;
}

/* Theme Variables - Light */
.theme-light {
    --sh-bg-primary: #f3f3f3;
    --sh-bg-secondary: #ffffff;
    --sh-bg-tertiary: #f0f0f0;
    --sh-bg-toolbar: #e8e8e8;
    --sh-bg-input: #ffffff;
    --sh-bg-hover: #e4e6e8;
    --sh-bg-tab: #ececec;
    --sh-bg-tab-hover: #e0e0e0;
    --sh-bg-active: #cce5ff;
    --sh-bg-selection: #add6ff;
    --sh-border: #d4d4d4;
    --sh-border-light: #c8c8c8;
    --sh-text-primary: #333333;
    --sh-text-secondary: #444444;
    --sh-text-muted: #666666;
    --sh-text-disabled: #999999;
    --sh-text-header: #555555;
    --sh-accent: #0066cc;
    --sh-accent-bg: #0078d4;
    --sh-error-bg: #d32f2f;
    --sh-icon-shader: #bf8803;
    --sh-icon-vert: #4e8a3e;
    --sh-icon-frag: #a45a28;
    --sh-modified-dot: #666666;
    --sh-canvas-bg: #1a1a1a;
    /* GLSL Syntax Highlighting */
    --glsl-comment: #008000;
    --glsl-preprocessor: #af00db;
    --glsl-keyword: #0000ff;
    --glsl-type: #267f99;
    --glsl-qualifier: #af00db;
    --glsl-number: #098658;
    --glsl-string: #a31515;
    --glsl-function: #795e26;
    --glsl-builtin-var: #001080;
}

/* Theme Toggle Button */
.shaders-theme-toggle, .shaders-toolbar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 1px solid var(--sh-border-light);
    border-radius: 4px;
    background: var(--sh-bg-input);
    color: var(--sh-text-primary);
    cursor: pointer;
    font-size: 14px;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

.shaders-theme-toggle:hover, .shaders-toolbar-btn:hover {
    border-color: var(--sh-accent);
    background: var(--sh-bg-hover);
}

.shaders-theme-toggle:focus, .shaders-toolbar-btn:focus {
    outline: none;
    border-color: var(--sh-accent);
    box-shadow: 0 0 0 2px rgba(51, 153, 204, 0.3);
}

.shaders-main-container {
    position: absolute;
    top: 46px;
    left: 0;
    right: 0;
    bottom: 0;
    box-sizing: border-box;
    display: flex;
    flex-direction: row;
    overflow: hidden;
}

.shaders-canvas-panel {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    background: var(--sh-bg-primary);
    position: relative;
}

.shaders-canvas-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    background: var(--sh-bg-toolbar);
    border-bottom: 1px solid var(--sh-border-light);
}

.shaders-canvas-toolbar label {
    color: var(--sh-text-primary);
    font-size: 14px;
    font-weight: 500;
}

.shaders-canvas-toolbar select {
    padding: 6px 10px;
    font-size: 14px;
    border: 1px solid var(--sh-border-light);
    border-radius: 4px;
    background: var(--sh-bg-input);
    color: var(--sh-text-primary);
    cursor: pointer;
}

.shaders-canvas-toolbar select:hover {
    border-color: var(--sh-accent);
}

.shaders-canvas-toolbar select:focus {
    outline: none;
    border-color: var(--sh-accent);
    box-shadow: 0 0 0 2px rgba(51, 153, 204, 0.3);
}

.shaders-canvas-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 10px;
}

.shaders-canvas-panel canvas {
    display: block;
    background: var(--sh-canvas-bg);
    max-width: 100%;
    max-height: 100%;
}

/* Control Panel - IDE Layout */
.shaders-control-panel {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: row;
    background: var(--sh-bg-secondary);
    border-left: 1px solid var(--sh-border);
    overflow: hidden;
}

/* File Tree Sidebar */
.shaders-file-tree {
    width: 200px;
    min-width: 150px;
    background: var(--sh-bg-tertiary);
    border-right: 1px solid var(--sh-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.shaders-file-tree-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--sh-text-header);
    background: var(--sh-bg-tertiary);
    border-bottom: 1px solid var(--sh-border);
}

.shaders-file-tree-header .shaders-theme-toggle {
    width: 22px;
    height: 22px;
    font-size: 12px;
}

.shaders-file-tree-content {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
}

.shaders-tree-folder {
    user-select: none;
}

.shaders-tree-folder-header {
    display: flex;
    align-items: center;
    padding: 4px 8px 4px 12px;
    cursor: pointer;
    color: var(--sh-text-secondary);
    font-size: 13px;
}

.shaders-tree-folder-header:hover {
    background: var(--sh-bg-hover);
}

.shaders-tree-folder-icon {
    margin-right: 6px;
    font-size: 12px;
    width: 16px;
    text-align: center;
    transition: transform 0.15s ease;
}

.shaders-tree-folder.collapsed .shaders-tree-folder-icon {
    transform: rotate(-90deg);
}

.shaders-tree-folder-items {
    display: block;
}

.shaders-tree-folder.collapsed .shaders-tree-folder-items {
    display: none;
}

.shaders-tree-item {
    display: flex;
    align-items: center;
    padding: 4px 8px 4px 32px;
    cursor: pointer;
    color: var(--sh-text-secondary);
    font-size: 13px;
}

.shaders-tree-item:hover {
    background: var(--sh-bg-hover);
}

.shaders-tree-item.active {
    background: var(--sh-bg-active);
}

.shaders-tree-item-icon {
    margin-right: 6px;
    font-size: 12px;
    color: var(--sh-icon-shader);
}

/* Editor Area */
.shaders-editor-area {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    background: var(--sh-bg-secondary);
}

/* Tab Bar */
.shaders-tab-bar {
    display: flex;
    background: var(--sh-bg-tertiary);
    border-bottom: 1px solid var(--sh-border);
    min-height: 35px;
    overflow-x: auto;
}

.shaders-tab {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    font-size: 13px;
    color: var(--sh-text-muted);
    background: var(--sh-bg-tab);
    border-right: 1px solid var(--sh-bg-tertiary);
    cursor: pointer;
    white-space: nowrap;
    min-width: 0;
}

.shaders-tab:hover {
    background: var(--sh-bg-tab-hover);
}

.shaders-tab.active {
    background: var(--sh-bg-secondary);
    color: var(--sh-text-primary);
    border-bottom: 1px solid var(--sh-bg-secondary);
    margin-bottom: -1px;
}

.shaders-tab-icon {
    margin-right: 6px;
    font-size: 12px;
}

.shaders-tab-icon.vert {
    color: var(--sh-icon-vert);
}

.shaders-tab-icon.frag {
    color: var(--sh-icon-frag);
}

.shaders-tab-label {
    overflow: hidden;
    text-overflow: ellipsis;
}

.shaders-tab-modified {
    margin-left: 6px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--sh-modified-dot);
    display: none;
}

.shaders-tab.modified .shaders-tab-modified {
    display: block;
}

/* Editor Content */
.shaders-editor-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.shaders-editor-pane {
    flex: 1;
    display: none;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.shaders-editor-pane.active {
    display: flex;
}

/* Syntax highlighting container */
.shaders-editor-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.shaders-editor-highlight {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 12px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.5;
    color: var(--sh-text-primary);
    background: var(--sh-bg-secondary);
    white-space: pre;
    overflow: auto;
    tab-size: 4;
    pointer-events: none;
    z-index: 1;
}

.shaders-editor-pane textarea {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    padding: 12px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.5;
    color: transparent;
    caret-color: var(--sh-text-primary);
    background: transparent;
    border: none;
    resize: none;
    outline: none;
    tab-size: 4;
    white-space: pre;
    overflow: auto;
    z-index: 2;
}

.shaders-editor-pane textarea::selection {
    background: var(--sh-bg-selection);
    color: var(--sh-text-primary);
}

/* GLSL Syntax Highlighting Classes */
.glsl-comment { color: var(--glsl-comment); font-style: italic; }
.glsl-preprocessor { color: var(--glsl-preprocessor); }
.glsl-keyword { color: var(--glsl-keyword); }
.glsl-type { color: var(--glsl-type); }
.glsl-qualifier { color: var(--glsl-qualifier); }
.glsl-number { color: var(--glsl-number); }
.glsl-string { color: var(--glsl-string); }
.glsl-function { color: var(--glsl-function); }
.glsl-builtin-var { color: var(--glsl-builtin-var); }

/* Status Bar */
.shaders-status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 12px;
    font-size: 12px;
    color: #ffffff;
    background: var(--sh-accent-bg);
}

.shaders-status-bar.error {
    background: var(--sh-error-bg);
}

.shaders-status-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.shaders-status-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Empty State */
.shaders-editor-empty {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sh-text-disabled);
    font-size: 14px;
}

/* Resize Handles */
.shaders-resize-handle {
    background: transparent;
    position: relative;
    flex-shrink: 0;
    z-index: 10;
}

.shaders-resize-handle::after {
    content: '';
    position: absolute;
    background: var(--sh-accent-bg);
    opacity: 0;
    transition: opacity 0.15s ease;
}

.shaders-resize-handle:hover::after,
.shaders-resize-handle.dragging::after {
    opacity: 1;
}

.shaders-resize-handle-h {
    width: 5px;
    cursor: col-resize;
    margin: 0 -2px;
}

.shaders-resize-handle-h::after {
    top: 0;
    bottom: 0;
    left: 2px;
    width: 1px;
}

.shaders-resize-handle-v {
    height: 5px;
    cursor: row-resize;
    margin: -2px 0;
}

.shaders-resize-handle-v::after {
    left: 0;
    right: 0;
    top: 2px;
    height: 1px;
}

/* Prevent text selection during resize */
.shaders-resizing {
    user-select: none;
    cursor: col-resize;
}

.shaders-resizing-v {
    user-select: none;
    cursor: row-resize;
}

.shaders-resizing iframe,
.shaders-resizing-v iframe {
    pointer-events: none;
}

/* Responsive layout */
@media (max-width: 1024px) {
    .shaders-file-tree {
        width: 160px;
        min-width: 120px;
    }
}

@media (max-width: 768px) {
    .shaders-main-container {
        flex-direction: column;
        overflow: hidden;
    }

    .shaders-canvas-panel {
        flex: 0 0 auto;
        height: 40vh;
        min-height: 200px;
        max-height: 50vh;
        overflow: hidden;
    }

    .shaders-canvas-toolbar {
        flex-shrink: 0;
    }

    .shaders-canvas-wrapper {
        min-height: 0;
        flex: 1;
    }

    #resize-main {
        display: none;
    }

    .shaders-control-panel {
        flex: 1 1 auto;
        min-height: 0;
        height: auto;
        border-left: none;
        border-top: 1px solid var(--sh-border);
    }

    .shaders-file-tree {
        width: 140px;
        min-width: 100px;
    }
}