/* Basic layout and light theming */
:root {
  --bg: #ffffff;
  --panel: #f8f9fa;
  --panel-2: #f1f3f4;
  --text: #212529;
  --muted: #6c757d;
  --accent: #0d6efd;
  --border: #dee2e6;
  --success: #198754;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.sidebar-topbar {
  padding: 8px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}
.sidebar-topbar-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}
.sidebar-topbar-content #rootPath {
  font-size: 12px;
  word-break: break-all;
  line-height: 1.2;
}
.sidebar-status {
  font-size: 11px;
  line-height: 1.2;
}
.muted { color: var(--muted); }

.layout { display: grid; grid-template-columns: 320px 4px 1fr; height: 100vh; transition: grid-template-columns .25s ease; }
.layout.sidebar-collapsed { grid-template-columns: 0 0 1fr; }
.layout.sidebar-collapsed .sidebar { overflow: hidden; }
.layout.sidebar-collapsed .splitter { cursor: default; }
.sidebar {
  border-right: none;
  background: var(--panel-2);
  overflow: auto; /* Allow both horizontal and vertical scrolling */
}
.splitter {
  background: var(--border);
  cursor: col-resize;
  user-select: none;
}
.splitter:hover {
  background: var(--accent);
}
.sidebar-header { 
  padding: 6px 8px; 
  border-bottom: 1px solid var(--border); 
  background: var(--panel); 
  display: flex;
  gap: 4px;
}
.tree-btn {
  padding: 2px 6px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
  flex: 1;
}
.tree-btn:hover {
  filter: brightness(1.1);
}
.viewer { 
  position: relative; 
  overflow-y: auto; /* Only vertical scrolling */
  overflow-x: hidden; /* No horizontal scrolling */
}
.placeholder { padding: 16px; color: var(--muted); }

button.primary {
  padding: 6px 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
}
button.primary:hover { filter: brightness(1.07); }

.tree { padding: 4px; min-width: 0; }
.tree ul { list-style: none; margin: 0; padding-left: 14px; min-width: 0; }
.tree li { margin: 1px 0; min-width: 0; }
.tree .item { 
  display: flex; 
  align-items: center; 
  gap: 4px; 
  padding: 2px 4px; 
  border-radius: 3px; 
  cursor: pointer; 
  font-size: 13px;
  min-width: 0;
  flex-shrink: 0;
}
.tree .item:hover { background: rgba(255,255,255,0.05); }
.tree .item.active { background: rgba(13, 110, 253, 0.15); }
.tree .twisty { 
  width: 12px; 
  display: inline-flex; 
  justify-content: center; 
  font-size: 11px;
  flex-shrink: 0;
}
.tree .name { 
  white-space: nowrap; 
  overflow: visible; 
  min-width: max-content;
  flex-shrink: 0;
}
.tree .badge { color: var(--muted); font-size: 11px; flex-shrink: 0; }

.viewer .content { 
  padding: 24px; 
  max-width: 1200px; 
  margin: 0 auto;
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.viewer iframe.pdf-frame { width: 100%; height: 100vh; border: 0; background: #ffffff; }

/* Markdown content defaults */
.viewer .content :where(h1,h2,h3) { border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.viewer .content code { background: #f8f9fa; border: 1px solid var(--border); border-radius: 4px; padding: 1px 4px; word-break: break-all; }
.viewer .content pre { overflow-x: hidden; word-wrap: break-word; white-space: pre-wrap; }
.viewer .content pre code { display: block; padding: 12px; word-break: break-all; }
.viewer .content a { color: #0d6efd; }
.viewer .content blockquote { border-left: 3px solid var(--border); margin: 0; padding-left: 12px; color: var(--muted); }
.viewer .content table { max-width: 100%; table-layout: fixed; word-wrap: break-word; }
.viewer .content td, .viewer .content th { word-wrap: break-word; overflow-wrap: break-word; }

/* KaTeX tweaks for light background and no scrollbars */
.katex { color: var(--text); }
.katex-display {
  padding: 2px 1px;
  margin: 0.8em 0;
  /* Remove scrollbars but keep proper layout */
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.katex-display::-webkit-scrollbar {
  display: none;
}

/* Editor Module Styles */
.edit-button {
  transition: background-color 0.2s, transform 0.1s;
}

.edit-button:hover {
  background: #005a9e !important;
  transform: translateY(-1px);
}

.edit-button:active {
  transform: translateY(0);
}

.save-cancel-container {
  transition: opacity 0.2s;
}

.save-btn:hover {
  background: #218838 !important;
  transform: translateY(-1px);
}

.cancel-btn:hover {
  background: #c82333 !important;
  transform: translateY(-1px);
}

.save-btn, .cancel-btn {
  transition: background-color 0.2s, transform 0.1s;
}

.save-btn:active, .cancel-btn:active {
  transform: translateY(0);
}

/* Toolbar button styles */
.toolbar-done-btn, .toolbar-save-btn, .toolbar-cancel-btn {
  transition: background-color 0.2s, transform 0.1s;
}

.toolbar-done-btn:hover, .toolbar-save-btn:hover {
  background: #218838 !important;
  transform: translateY(-1px);
}

.toolbar-cancel-btn:hover {
  background: #c82333 !important;
  transform: translateY(-1px);
}

.toolbar-done-btn:active, .toolbar-save-btn:active, .toolbar-cancel-btn:active {
  transform: translateY(0);
}

.toolbar-button-container {
  gap: 8px;
}

#editor-container {
  background: #ffffff;
  border: 1px solid #ddd;
  border-radius: 4px;
  overflow: hidden;
}

.editor-toolbar {
  border-bottom: 1px solid #ddd;
  background: #f8f9fa;
}

.editor-title {
  color: #333;
  font-size: 14px;
}

.done-editing-btn:hover {
  background: #005a9e !important;
}

.done-editing-btn:active {
  background: #004785 !important;
}

/* Toast Editor Styling */
.toastui-editor-defaultUI {
  border: none;
}

.toastui-editor-toolbar {
  border-bottom: 1px solid #e0e0e0;
}

/* SunEditor Styling */
.sun-editor {
  border: none;
}

.se-toolbar {
  border-bottom: 1px solid #e0e0e0;
}

.se-wrapper {
  border: none;
}

/* Make sure editors fill the available space */
#editor-wrapper {
  min-height: 0;
}

#editor-wrapper .toastui-editor,
#editor-wrapper .sun-editor {
  height: 100% !important;
}

#editor-wrapper .toastui-editor .toastui-editor-defaultUI {
  height: 100%;
}

#editor-wrapper .toastui-editor .toastui-editor-main {
  height: calc(100% - 49px); /* Subtract toolbar height */
}

#editor-wrapper .sun-editor .se-container {
  height: 100%;
}

#editor-wrapper .sun-editor .se-wrapper {
  height: calc(100% - 49px); /* Subtract toolbar height */
}