/* ---------- Tokens ---------- */
:root {
  --bg: #f7f7f5;
  --panel: #ffffff;
  --side: #f1f1ee;
  --fg: #1d1d1b;
  --muted: #6d6d67;
  --line: #e3e3de;
  --accent: #1f5fd6;
  --accent-soft: #e7eefc;
  --code-bg: #eeeeea;
  --mark: #fff0a3;
  --danger: #c0392b;
  --side-w: 282px;
  --top-h: 52px;
  --radius: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131313;
    --panel: #1c1c1c;
    --side: #171717;
    --fg: #e9e9e4;
    --muted: #9b9b94;
    --line: #2d2d2a;
    --accent: #7aaaff;
    --accent-soft: #1c2a45;
    --code-bg: #242422;
    --mark: #5c4d00;
    --danger: #ff7b6b;
  }
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.muted { color: var(--muted); }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  height: var(--top-h);
  display: flex; align-items: center; gap: 12px;
  padding: 0 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 650; color: var(--fg); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.spacer { flex: 1; }
.logout button {
  background: none; border: 1px solid var(--line); border-radius: 6px;
  padding: 4px 10px; color: var(--muted); cursor: pointer; font-size: 13px;
}
.logout button:hover { color: var(--fg); border-color: var(--muted); }
.menu-btn {
  display: none; background: none; border: 0; color: var(--fg);
  padding: 6px; margin-left: -6px; border-radius: 6px; cursor: pointer;
}
.menu-btn:hover { background: var(--side); }

/* ---------- Layout ---------- */
.layout { display: flex; align-items: flex-start; }
.sidebar {
  width: var(--side-w); flex: 0 0 auto;
  position: sticky; top: var(--top-h);
  height: calc(100vh - var(--top-h));
  overflow-y: auto;
  padding: 14px 10px 24px;
  background: var(--side);
  border-right: 1px solid var(--line);
}
.content { flex: 1; min-width: 0; padding: 36px 40px 96px; }
.page { max-width: 760px; margin: 0 auto; }
.backdrop { display: none; }

/* ---------- Sidebar ---------- */
.search input {
  width: 100%; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 6px;
  background: var(--panel); color: var(--fg); font: inherit; font-size: 14px;
}
.search input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.tree, .tree ul { list-style: none; margin: 0; padding: 0; }
.tree { margin-top: 12px; font-size: 14px; }
.tree ul { padding-left: 14px; }
.tree li.note a, .tree summary {
  display: block; padding: 5px 8px; border-radius: 6px; color: var(--fg);
}
.tree li.note a { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tree li.note a:hover, .tree summary:hover { background: var(--panel); text-decoration: none; }
.tree li.active > a { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.tree summary {
  display: flex; align-items: center; gap: 7px;
  cursor: pointer; font-weight: 600; list-style: none; user-select: none;
}
.tree summary::-webkit-details-marker { display: none; }
.tree summary::before {
  content: ""; flex: 0 0 auto;
  border-left: 5px solid var(--muted); border-top: 4px solid transparent; border-bottom: 4px solid transparent;
  transition: transform .15s ease;
}
.tree details[open] > summary::before { transform: rotate(90deg); }
.tree .label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree .count { margin-left: auto; color: var(--muted); font-weight: 400; font-size: 12px; }
.no-match, .sidebar-foot { color: var(--muted); font-size: 12px; padding: 12px 8px 0; margin: 0; }

/* ---------- Home / lists ---------- */
h1 { font-size: 2rem; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 8px; }
.lede { color: var(--muted); margin: 0 0 32px; }
section { margin-bottom: 40px; }
section h2 {
  font-size: 12px; text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted); margin: 0 0 8px; font-weight: 600;
}
.rows { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.rows li {
  display: flex; align-items: baseline; gap: 12px;
  padding: 9px 0; border-bottom: 1px solid var(--line);
}
.rows li a { color: var(--fg); font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rows li a:hover { color: var(--accent); }
.rows .folder-link { font-weight: 600; }
.where { color: var(--muted); font-size: 13px; }
.rows time { margin-left: auto; color: var(--muted); font-size: 13px; white-space: nowrap; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.card {
  display: flex; flex-direction: column; gap: 2px;
  padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); color: var(--fg);
}
.card:hover { border-color: var(--accent); text-decoration: none; }
.card strong { font-size: 17px; letter-spacing: -0.01em; }
.card span { color: var(--muted); font-size: 13px; }
.callout { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; background: var(--panel); }
.callout pre { background: var(--code-bg); padding: 10px 12px; border-radius: 6px; overflow-x: auto; font-size: 13px; }

/* ---------- Note page ---------- */
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.crumbs span { margin: 0 7px; }
.note-meta { display: flex; flex-wrap: wrap; gap: 6px 16px; color: var(--muted); font-size: 13px; margin: 0 0 24px; }
.note-meta b { font-weight: 500; text-transform: capitalize; color: var(--fg); }
.contents {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel);
  padding: 10px 16px; margin-bottom: 28px; font-size: 14px;
}
.contents summary { cursor: pointer; font-weight: 600; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; }
.contents ul { margin: 6px 0 4px; padding-left: 18px; }
.contents li { margin: 2px 0; }

/* ---------- Rendered Markdown ---------- */
.markdown { font-size: 16.5px; }
.markdown > :first-child { margin-top: 0; }
.markdown h1, .markdown h2, .markdown h3, .markdown h4 { line-height: 1.25; letter-spacing: -0.01em; margin: 1.6em 0 .5em; scroll-margin-top: 70px; }
.markdown h1 { font-size: 1.7em; }
.markdown h2 { font-size: 1.4em; padding-bottom: .25em; border-bottom: 1px solid var(--line); }
.markdown h3 { font-size: 1.15em; }
.markdown h4 { font-size: 1em; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; font-size: .85em; }
.markdown p, .markdown ul, .markdown ol, .markdown blockquote, .markdown pre, .markdown table { margin: 0 0 1em; }
.markdown ul, .markdown ol { padding-left: 1.5em; }
.markdown li + li { margin-top: .2em; }
.markdown li.task { list-style: none; margin-left: -1.5em; padding-left: 1.5em; }
.markdown li.task input { margin: 0 .45em 0 -1.5em; vertical-align: -1px; accent-color: var(--accent); }
.markdown blockquote {
  margin-left: 0; padding: .2em 1em; color: var(--muted);
  border-left: 3px solid var(--line);
}
.markdown code {
  font-family: var(--mono); font-size: .88em;
  background: var(--code-bg); padding: .15em .4em; border-radius: 4px;
}
.markdown pre {
  background: var(--code-bg); padding: 12px 14px; border-radius: var(--radius);
  overflow-x: auto; font-size: 13.5px; line-height: 1.5;
}
.markdown pre code { background: none; padding: 0; font-size: inherit; }
.markdown table { border-collapse: collapse; display: block; overflow-x: auto; max-width: 100%; font-size: .92em; }
.markdown th, .markdown td { border: 1px solid var(--line); padding: 6px 12px; text-align: left; vertical-align: top; }
.markdown th { background: var(--side); font-weight: 600; white-space: nowrap; }
.markdown tbody tr:nth-child(even) { background: color-mix(in srgb, var(--side) 55%, transparent); }
.markdown img { max-width: 100%; height: auto; border-radius: 6px; }
.markdown hr { border: 0; border-top: 1px solid var(--line); margin: 2em 0; }
.markdown a { text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.markdown mark, .snippet mark, .result-head mark { background: var(--mark); color: inherit; padding: 0 2px; border-radius: 2px; }
.markdown .footnote { font-size: .9em; color: var(--muted); }
.markdown kbd { font-family: var(--mono); font-size: .85em; border: 1px solid var(--line); border-bottom-width: 2px; padding: 0 .35em; border-radius: 4px; }

/* ---------- Search ---------- */
.search-big { display: flex; gap: 8px; margin-bottom: 24px; }
.search-big input {
  flex: 1; padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px;
  background: var(--panel); color: var(--fg); font: inherit;
}
.search-big input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.search-big button {
  padding: 0 16px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; cursor: pointer;
}
.results { list-style: none; margin: 0; padding: 0; }
.results li { padding: 12px 0; border-bottom: 1px solid var(--line); }
.result-head { display: flex; align-items: baseline; gap: 10px; }
.result-head a { font-weight: 600; color: var(--fg); }
.result-head a:hover { color: var(--accent); }
.hits { margin-left: auto; color: var(--muted); font-size: 12px; }
.snippet { margin: 4px 0 0; color: var(--muted); font-size: 14px; }

/* ---------- Login ---------- */
.login-body { background: var(--bg); }
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card {
  width: min(360px, 100%);
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 28px 28px 24px;
  box-shadow: 0 12px 40px -20px rgba(0, 0, 0, .3);
}
.login-card h1 { font-size: 1.4rem; margin: 0 0 4px; }
.login-hint { color: var(--muted); margin: 0 0 20px; font-size: 14px; }
.login-card input[type="password"] {
  width: 100%; padding: 10px 12px; font: inherit;
  border: 1px solid var(--line); border-radius: 6px;
  background: var(--bg); color: var(--fg);
}
.login-card input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.login-card input[aria-invalid="true"] { border-color: var(--danger); }
.login-error { color: var(--danger); font-size: 14px; margin: 10px 0 0; }
.login-card button {
  width: 100%; margin-top: 16px; padding: 10px;
  border: 0; border-radius: 6px; background: var(--accent); color: #fff;
  font-weight: 600; cursor: pointer;
}
.login-card button:hover { filter: brightness(1.08); }

/* ---------- Mobile ---------- */
@media (max-width: 860px) {
  .menu-btn { display: inline-flex; }
  .content { padding: 24px 20px 80px; }
  .sidebar {
    position: fixed; left: 0; top: var(--top-h); z-index: 25;
    height: calc(100vh - var(--top-h));
    transform: translateX(-100%);
    transition: transform .2s ease;
    box-shadow: 0 0 0 rgba(0,0,0,0);
  }
  body.nav-open .sidebar { transform: none; box-shadow: 0 10px 40px rgba(0,0,0,.25); }
  .backdrop { position: fixed; inset: var(--top-h) 0 0 0; background: rgba(0,0,0,.35); z-index: 20; }
  body:not(.nav-open) .backdrop { display: none; }
  body.nav-open .backdrop { display: block; }
  body.nav-open { overflow: hidden; }
  .rows li { flex-wrap: wrap; }
}
@media print {
  .topbar, .sidebar, .backdrop, .contents { display: none !important; }
  .content { padding: 0; }
}