:root {
  --bg: #ffffff;
  --fg: #222222;
  --accent: #007acc;
  --border: #e1e4e8;
  --hover: #f6f8fa;
  --success: #28a745;
  --warning: #ffc107;
  --danger: #dc3545;
  --shadow: rgba(0, 0, 0, 0.1);
  /* New variables for code highlighting */
  --code-bg: #f6f8fa;
  --code-fg: #24292e;
  --code-comment: #6a737d;
  --code-keyword: #d73a49;
  --code-string: #032f62;
  --code-function: #6f42c1;
  --code-number: #005cc5;
}

[data-theme="dark"] {
  --bg: #1e1e1e;
  --fg: #d4d4d4;
  --border: #3c3c3c;
  --hover: #2d2d30;
  --shadow: rgba(0, 0, 0, 0.3);
  /* Dark theme code colors */
  --code-bg: #2d2d30;
  --code-fg: #d4d4d4;
  --code-comment: #608b4e;
  --code-keyword: #569cd6;
  --code-string: #ce9178;
  --code-function: #dcdcaa;
  --code-number: #b5cea8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-container {
  display: flex;
  align-items: center;
}

.logo {
  height: 40px;
  width: auto;
  transition: opacity 0.3s ease;
}

.dark-logo {
  display: none;
}

.light-logo {
  display: block;
}

[data-theme="dark"] .dark-logo {
  display: block;
}

[data-theme="dark"] .light-logo {
  display: none;
}

#themeToggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

#themeToggle:hover {
  background: var(--hover);
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

#dropZone {
  text-align: center;
  padding: 4rem 2rem;
  border: 2px dashed var(--accent);
  border-radius: 12px;
  margin: 2rem 0;
  transition: all 0.3s ease;
  background: var(--hover);
}

#dropZone.drag {
  border-color: var(--success);
  background: rgba(40, 167, 69, 0.1);
  transform: scale(1.02);
}

.drop-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.drop-icon {
  font-size: 3rem;
  color: var(--accent);
  opacity: 0.7;
}

button {
  cursor: pointer;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: white;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

button:hover {
  background: #0056b3;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px var(--shadow);
}

button:active {
  transform: translateY(0);
}

#selectBtn {
  font-size: 1.1rem;
  padding: 1rem 2rem;
}

progress {
  width: 100%;
  height: 8px;
  margin-top: 1rem;
  border-radius: 4px;
  border: none;
  background: var(--border);
}

progress::-webkit-progress-bar {
  background: var(--border);
  border-radius: 4px;
}

progress::-webkit-progress-value {
  background: var(--accent);
  border-radius: 4px;
}

#treeContainer {
  margin: 2rem 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.tree-header {
  padding: 1rem;
  background: var(--hover);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

#filterTree {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
  font-size: 0.9rem;
}

#filterTree:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 122, 204, 0.2);
}

.stats {
  font-size: 0.85rem;
  color: #666;
  white-space: nowrap;
}

#tree {
  padding: 1rem;
  max-height: 400px;
  overflow-y: auto;
}

#exportBar {
  padding: 1rem;
  background: var(--hover);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

#copyBtn {
  background: var(--success);
}

#copyBtn:hover {
  background: #218838;
}

#downloadBtn {
  background: var(--accent);
}

#resetBtn {
  background: var(--warning);
  color: #000;
}

#resetBtn:hover {
  background: #e0a800;
}

#preview {
  margin: 2rem 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

#preview summary {
  padding: 1rem;
  background: var(--hover);
  cursor: pointer;
  font-weight: 500;
  border-bottom: 1px solid var(--border);
}

#preview summary:hover {
  background: var(--border);
}

#previewCode {
  margin: 0;
  padding: 1rem;
  background: var(--code-bg) !important;
  color: var(--code-fg) !important;
  font-size: 0.85rem;
  line-height: 3;
  max-height: 500px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  font-family: "Consolas", "Monaco", "Courier New", monospace;
}

/* Prism.js theme overrides - use CSS variables */
:not(pre) > code[class*="language-"],
pre[class*="language-"] {
  background: var(--hover) !important;
  color: var(--fg) !important;
}

.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
  color: var(--fg);
  opacity: 0.6;
}

.token.punctuation {
  color: var(--fg);
  opacity: 0.8;
}

.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol,
.token.deleted {
  color: var(--accent);
}

.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted {
  color: var(--success);
}

.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string {
  color: var(--fg);
  opacity: 0.9;
}

.token.atrule,
.token.attr-value,
.token.keyword {
  color: var(--accent);
  font-weight: 500;
}

.token.function,
.token.class-name {
  color: var(--warning);
}

.token.regex,
.token.important,
.token.variable {
  color: var(--danger);
}

.token.important,
.token.bold {
  font-weight: bold;
}

.token.italic {
  font-style: italic;
}

/* Dark theme specific overrides */
[data-theme="dark"] :not(pre) > code[class*="language-"],
[data-theme="dark"] pre[class*="language-"] {
  background: var(--hover) !important;
}

/* Ensure code blocks are readable */
#previewCode {
  background: var(--hover) !important;
  color: var(--fg) !important;
}

/* JSTree theme overrides */
.jstree-default .jstree-node {
  margin-left: 0;
  line-height: 1.8;
  min-height: 24px;
}

.jstree-default .jstree-icon {
  color: var(--accent);
  display: inline-block !important;
  vertical-align: middle !important;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  line-height: 18px;
  text-align: center;
  margin: 0;
  padding: 0;
}

.jstree-default .jstree-anchor {
  color: var(--fg);
  padding: 4px 8px;
  border-radius: 4px;
  display: inline-flex !important;
  flex-direction: row !important;
  align-items: center !important;
  gap: 6px;
  line-height: 1.4;
  vertical-align: middle;
}

.jstree-default .jstree-ocl {
  display: inline-block !important;
  vertical-align: middle !important;
  width: 18px;
  height: 18px;
  line-height: 18px;
  margin-right: 2px;
}

.jstree-default .jstree-anchor:hover {
  background: var(--hover);
}

.jstree-default .jstree-clicked {
  background: var(--accent) !important;
  color: white !important;
}

.jstree-default .jstree-clicked .jstree-icon {
  color: white !important;
}

/* Folder icons */
.jstree-default .bi-folder-fill {
  color: var(--warning);
}

.jstree-default .jstree-clicked .bi-folder-fill {
  color: white !important;
}

/* Hide jsTree wholerow elements */
.jstree-wholerow {
  display: none !important;
}

.jstree-wholerow-hovered {
  display: none !important;
}

.jstree-wholerow-clicked {
  display: none !important;
}

/* Responsive design */
@media (max-width: 768px) {
  header {
    padding: 1rem;
  }

  main {
    padding: 1rem;
  }

  #dropZone {
    padding: 2rem 1rem;
  }

  .tree-header {
    flex-direction: column;
    align-items: stretch;
  }

  #exportBar {
    flex-direction: column;
  }

  button {
    justify-content: center;
  }
}

/* Loading animation */
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.loading {
  animation: pulse 1.5s ease-in-out infinite;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--hover);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}