:root {
    --folder-gold: #d4a017;
    --folder-gold-light: #fcebb6;
    --sidebar-bg: #f8f9fa;
    --border-color: #ddd;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    margin: 0;
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: grid;
    grid-template-columns: 300px 1fr 1fr;
    height: 100vh;
}

.pane {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    overflow: hidden;
}

.pane-header {
    padding: 10px 15px;
    background: #34495e;
    color: white;
    font-size: 0.75rem;
    font-weight: bold;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* TOC Sidebar (Left) */
.toc-sidebar {
    background: var(--sidebar-bg);
}

.toc-content {
    flex: 1;
    padding: 10px;
    overflow-y: hidden;
}

#toc-tree {
    --wb-connect-line-color: #bdc3c7;
    border: none;
}

/* Windows Style Folder Icons */
#toc-tree .fa-folder,
#toc-tree .fa-folder-open {
    font-weight: 900 !important;
    font-size: 13px;
    background: linear-gradient(180deg, var(--folder-gold-light) 0%, var(--folder-gold) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    -webkit-text-stroke: 0.5px var(--folder-gold);
}

#toc-tree .fa-file {
    color: #7f8c8d !important;
    font-weight: 400 !important;
}

.wb-node-list.wb-connect-lines .wb-indent {
    border-left: 1px solid var(--wb-connect-line-color);
}

div.wunderbaum {
    height: calc(100% - 50px);
    min-height: 4px;
    background-color: transparent !important;
    margin: 0px;
    padding: 0px;
    font-family: var(--wb-font-stack);
    font-size: 14px;
    color: var(--wb-node-text-color);
    border: 0px solid var(--wb-border-color);
    border-radius: 0px;
    background-clip: content-box;
    overflow-x: hidden;
    overflow-y: auto;
}

/* Width */
div.wunderbaum::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
  
/* Track */
div.wunderbaum::-webkit-scrollbar-track {
    box-shadow: inset 0 0 5px #73b0ce;
    border-radius: 8px;
}
   
/* Handle */
div.wunderbaum::-webkit-scrollbar-thumb {
    background-color: #3a96c4;
    border-radius: 10px;
}
  
/* Handle on hover */
div.wunderbaum::-webkit-scrollbar-thumb:hover {
    background-color: #3a96c4;
    cursor: pointer;
}

div.wunderbaum span.wb-node span.wb-title {
    font-family: 'Roboto', sans-serif;
    vertical-align: middle !important;
    font-size: 12px;
    padding-left: 3px;
}

div.wunderbaum span.wb-node i.wb-expander, div.wunderbaum span.wb-node i.wb-icon {
    font-size: 12px;
    align-content: normal;
    text-align: center;
}      

/* Search Filter */
.filter-wrapper {
    margin-bottom: 15px;
}

#filterInput {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    outline: none;
}

/* Editor (Middle) - Modified to accommodate EasyMDE */
.editor-container {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.EasyMDEContainer {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.EasyMDEContainer .CodeMirror {
    flex: 1;
    border: none;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.EasyMDEContainer .editor-toolbar {
    border: none;
    border-top: 1px solid var(--border-color);
    border-radius: 0;
    padding: 5px 10px;
}

/* Preview (Right) */
#preview-area {
    flex: 1;
    padding: 25px 40px;
    overflow-y: auto;
    background: #fff;
    scroll-behavior: smooth;
}

#preview-area h1 {
    border-bottom: 2px solid #eee;
}

#preview-area h2 {
    border-bottom: 1px solid #f0f0f0;
    margin-top: 2em;
}