:root {
  --bg: #000000;
  --text: #ffffff;
  --panel: #0f0f0f;
  --panel-2: #161616;
  --border: #2a2a2a;
  --muted: #9a9a9a;
  --link: #7ab7ff;
  --max-width: 900px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100%; background: var(--bg); color: var(--text); }
body { font-family: var(--font); }

.app {
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--panel);
  overflow: auto;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-header,
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
}

.title {
  font-size: 18px;
  font-weight: 700;
}

.ghost-button {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
}

.ghost-button:hover { background: rgba(255,255,255,.06); }
#mobileSidebar { display: none; }

.tree {
  padding: 12px;
}

.tree details {
  margin: 4px 0;
  border-radius: 8px;
}

.tree summary {
  cursor: pointer;
  padding: 8px 10px;
  list-style: none;
  color: var(--text);
}
.tree summary::-webkit-details-marker { display: none; }
.tree summary:hover { background: rgba(255,255,255,.06); }

.tree .folder-label::before {
  content: "▸";
  display: inline-block;
  width: 16px;
}
.tree details[open] > summary .folder-label::before { content: "▾"; }

.tree .file-link {
  display: block;
  padding: 8px 10px 8px 26px;
  color: var(--text);
  text-decoration: none;
  border-radius: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tree .file-link:hover,
.tree .file-link.active { background: rgba(255,255,255,.08); }

.main { min-width: 0; }
.toolbar {
  position: sticky;
  top: 0;
  z-index: 20;
}
.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.picker-group {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}
.picker-group input[type="color"] {
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
}

.breadcrumbs {
  color: var(--muted);
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.content {
  max-width: var(--max-width);
  padding: 32px 24px 96px;
  margin: 0 auto;
  line-height: 1.6;
  word-wrap: break-word;
}

.content h1,
.content h2,
.content h3,
.content h4,
.content h5,
.content h6 {
  line-height: 1.2;
  margin-top: 1.5em;
  margin-bottom: .5em;
}
.content a { color: var(--link); }
.content p, .content ul, .content ol, .content blockquote, .content table, .content pre {
  margin: 0 0 1rem;
}
.content code {
  font-family: var(--mono);
  background: rgba(255,255,255,.08);
  padding: .15em .35em;
  border-radius: 4px;
}
.content pre {
  overflow: auto;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255,255,255,.04);
}
.content pre code {
  background: transparent;
  padding: 0;
}
.content blockquote {
  border-left: 3px solid var(--border);
  padding-left: 12px;
  color: #d0d0d0;
}
.content table {
  width: 100%;
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
}
.content th, .content td {
  border: 1px solid var(--border);
  padding: 8px;
  text-align: left;
}
.content img { max-width: 100%; }
.loading, .error {
  color: var(--muted);
}

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(85vw, 320px);
    transform: translateX(-100%);
    transition: transform .2s ease;
    z-index: 30;
  }
  .sidebar.open { transform: translateX(0); }
  #mobileSidebar { display: inline-block; }
}