/**
 * Lesson Editor Page Styling
 * 
 * Styles for Fluent Community lesson editor page with collapsible
 * and resizable sidebar functionality.
 * 
 * Uses FCOM CSS variables for theming/dark mode compatibility.
 */

/* CSS Variables for maintainability */
:root {
    --fca-editor-sidebar-width: 300px;
    --fca-editor-sidebar-collapsed-width: 40px;
    --fca-editor-sidebar-min-width: 200px;
    --fca-editor-sidebar-max-width: 500px;
    --fca-editor-resize-handle-width: 4px;
    --fca-editor-toggle-button-size: 32px;
    --fca-editor-transition-duration: 0.3s;
}

/* Sidebar container styling */
.fcom_full_editor_side {
    position: relative;
    transition: width var(--fca-editor-transition-duration) ease, 
                min-width var(--fca-editor-transition-duration) ease;
    overflow: visible;
}

/* Collapsed state */
.fcom_full_editor_side.fca-sidebar-collapsed {
    --el-aside-width: var(--fca-editor-sidebar-collapsed-width) !important;
    width: var(--fca-editor-sidebar-collapsed-width) !important;
    min-width: var(--fca-editor-sidebar-collapsed-width) !important;
}

/* Expanded state with custom width */
.fcom_full_editor_side:not(.fca-sidebar-collapsed) {
    width: var(--el-aside-width, var(--fca-editor-sidebar-width));
    min-width: var(--fca-editor-sidebar-min-width);
    max-width: var(--fca-editor-sidebar-max-width);
}

/* Toggle button container */
.fca-sidebar-toggle-container {
    position: absolute;
    top: 20px;
    right: -16px;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    width: var(--fca-editor-toggle-button-size);
    height: var(--fca-editor-toggle-button-size);
    background: var(--fcom-primary-bg, #ffffff);
    border: 1px solid var(--fcom-primary-border, #e5e7eb);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}

.fca-sidebar-toggle-container:hover {
    background: var(--fcom-active-bg, #f8f8f8);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    transform: scale(1.05);
}

.fca-sidebar-toggle-container:active {
    transform: scale(0.95);
}

/* Toggle button icon */
.fca-sidebar-toggle-icon {
    width: 16px;
    height: 16px;
    fill: var(--fcom-primary-text, #19283a);
    transition: transform var(--fca-editor-transition-duration) ease;
}

.fca-sidebar-collapsed .fca-sidebar-toggle-icon {
    transform: rotate(180deg);
}

/* Resize handle */
.fca-sidebar-resize-handle {
    position: absolute;
    top: 0;
    right: 0;
    width: var(--fca-editor-resize-handle-width);
    height: 100%;
    cursor: col-resize;
    background: transparent;
    z-index: 99;
    transition: background 0.2s ease;
}

.fca-sidebar-resize-handle:hover,
.fca-sidebar-resize-handle.fca-resizing {
    background: var(--fcom-primary-button, #1877F2);
}

/* Hide resize handle when collapsed */
.fca-sidebar-collapsed .fca-sidebar-resize-handle {
    display: none;
}

/* Hide sidebar content when collapsed */
.fca-sidebar-collapsed .el-scrollbar {
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--fca-editor-transition-duration) ease;
}

.fcom_full_editor_side:not(.fca-sidebar-collapsed) .el-scrollbar {
    opacity: 1;
    pointer-events: auto;
}

/* Prevent text selection during resize */
.fca-resizing,
.fca-resizing * {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* Smooth transitions for sidebar content */
.fcom_full_editor_side .el-scrollbar__view {
    transition: opacity var(--fca-editor-transition-duration) ease;
}

/* Adjust main content area when sidebar is collapsed */
.fcom_full_editor_side.fca-sidebar-collapsed ~ * {
    transition: margin var(--fca-editor-transition-duration) ease;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .fca-sidebar-toggle-container {
        right: -12px;
        width: 28px;
        height: 28px;
    }
    
    .fca-sidebar-toggle-icon {
        width: 14px;
        height: 14px;
    }
    
    /* On mobile, allow sidebar to be fully hidden */
    .fca-sidebar-collapsed {
        --el-aside-width: 0px !important;
        width: 0px !important;
        min-width: 0px !important;
        overflow: hidden;
    }
    
    .fca-sidebar-collapsed .fca-sidebar-toggle-container {
        right: 0;
        border-radius: 0 4px 4px 0;
    }
}