:root {
  --bg: #fbfaf7; --panel: #f3f1ec; --text: #23212b; --muted: #77737f; --line: #e2dfd8;
  --accent: #5b4bc4; --accent-text: #fff; --link: #4a3bb0; --warn: #9a4b00; --code: #efece6;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16151d; --panel: #1d1b26; --text: #e8e6ef; --muted: #9b97a8; --line: #2e2b3a;
    --accent: #8b7cf0; --accent-text: #120f1f; --link: #a99cff; --warn: #f0a35a; --code: #24212f;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #16151d; --panel: #1d1b26; --text: #e8e6ef; --muted: #9b97a8; --line: #2e2b3a;
  --accent: #8b7cf0; --accent-text: #120f1f; --link: #a99cff; --warn: #f0a35a; --code: #24212f;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
button, .btn { font: inherit; font-size: 14px; padding: 6px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--text); cursor: pointer; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.small { padding: 5px 10px; }
button:disabled { opacity: .5; }
.icon-btn { border: none; background: none; font-size: 20px; padding: 4px 8px; }
.muted { color: var(--muted); }
.warn { color: var(--warn); }
code, pre { background: var(--code); border-radius: 6px; font: 13.5px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }
code { padding: 1px 5px; }
pre { padding: 12px; overflow-x: auto; white-space: pre-wrap; word-break: break-word; }
pre code { background: none; padding: 0; }

.signin { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.signin-card { text-align: center; max-width: 340px; }
.signin-card h1 { margin: 12px 0 4px; }
.signin-card button { margin-top: 16px; padding: 10px 20px; font-size: 16px; }

.topbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 8px; padding: 8px 12px; padding-top: max(8px, env(safe-area-inset-top)); background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; color: var(--text); margin-right: 4px; }
.search { flex: 1; min-width: 0; }
.search input { width: 100%; font: inherit; font-size: 15px; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--text); }
#menu-btn { display: none; }

.layout { display: grid; grid-template-columns: 270px 1fr; min-height: calc(100vh - 53px); }
.sidebar { border-right: 1px solid var(--line); padding: 12px 8px 40px; font-size: 14px; overflow-y: auto; max-height: calc(100vh - 53px); position: sticky; top: 53px; }
.sidebar ul { list-style: none; margin: 0; padding-left: 12px; }
.sidebar > div > ul { padding-left: 4px; }
.sidebar li { margin: 1px 0; }
.sidebar a { display: block; padding: 3px 6px; border-radius: 6px; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar a.current { background: var(--accent); color: var(--accent-text); }
.sidebar a.unread::after { content: " •"; color: var(--accent); }
.folder { border: none; background: none; padding: 3px 6px; font-weight: 600; font-size: 14px; }
.pending { margin: 0 4px 12px; padding: 10px; border-radius: 8px; background: var(--code); font-size: 13px; }

.main { padding: 20px 32px 80px; min-width: 0; max-width: 860px; }
.page-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 8px; }
.crumbs { color: var(--muted); font-size: 13px; word-break: break-all; }
.actions { display: flex; gap: 6px; }
.page { overflow-wrap: anywhere; }
.page h1 { font-size: 1.8em; line-height: 1.2; margin: .3em 0 .5em; }
.page img { max-width: 100%; border-radius: 8px; }
.page table { border-collapse: collapse; display: block; overflow-x: auto; }
.page th, .page td { border: 1px solid var(--line); padding: 4px 8px; }
.page blockquote { margin: 0; padding-left: 14px; border-left: 3px solid var(--line); color: var(--muted); }
.fm { font-size: 13px; color: var(--muted); margin-bottom: 16px; border-collapse: collapse; }
.fm th { text-align: left; padding-right: 10px; font-weight: 600; vertical-align: top; }
.fm td { word-break: break-all; }
.wikilink { border-bottom: 1px dotted var(--link); }
.wikilink.missing { color: var(--muted); border-bottom-color: var(--muted); cursor: default; }
.pdf { width: 100%; height: 75vh; border: 1px solid var(--line); border-radius: 8px; }
.backlinks { margin-top: 40px; padding-top: 12px; border-top: 1px solid var(--line); font-size: 14px; }
.backlinks h3 { font-size: 14px; color: var(--muted); margin: 0 0 6px; }
.results { list-style: none; padding: 0; }
.results li { margin-bottom: 14px; }
.results p { margin: 2px 0 0; font-size: 14px; color: var(--muted); }
.history { padding-left: 18px; }
.editor textarea { width: 100%; min-height: 70vh; font: 14px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; padding: 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--text); }
.graph-wrap { position: fixed; inset: 53px 0 0 270px; }
#graph { width: 100%; height: 100%; }

dialog { border: 1px solid var(--line); border-radius: 12px; background: var(--bg); color: var(--text); width: min(560px, calc(100vw - 32px)); padding: 20px; }
dialog::backdrop { background: rgba(0,0,0,.4); }
dialog h2 { margin: 0 0 4px; }
dialog label { display: block; margin: 12px 0 0; font-size: 14px; font-weight: 600; }
dialog input[type=text], dialog input[type=url], dialog textarea { display: block; width: 100%; margin-top: 4px; font: inherit; font-weight: 400; padding: 8px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--text); }
dialog input[type=file] { display: block; margin-top: 6px; font-weight: 400; max-width: 100%; }
.row { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

@media (max-width: 760px) {
  #menu-btn { display: block; }
  .brand { display: none; }
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: fixed; top: 53px; left: 0; bottom: 0; width: 85vw; max-width: 320px; max-height: none; background: var(--panel); z-index: 9; transform: translateX(-100%); transition: transform .2s; }
  body.nav-open .sidebar { transform: none; box-shadow: 0 0 40px rgba(0,0,0,.3); }
  .main { padding: 16px 16px 80px; }
  .graph-wrap { left: 0; }
}