:root {
  --bg: #0a0e14;
  --panel: #0d1117;
  --panel-2: #11161e;
  --line: #222a35;
  --fg: #d6dde6;
  --muted: #8b949e;
  --dim: #4f5866;
  --green: #7ee787;
  --cyan: #79c0ff;
  --amber: #f2cc60;
  --purple: #b4a0ff;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 62px; }
html, body { margin: 0; background: var(--bg); color: var(--fg); }
body { font: 15px/1.7 Inter, system-ui, -apple-system, sans-serif; }

.app {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr) 320px;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

/* top bar */
.topbar {
  grid-column: 1 / -1;
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; gap: 16px;
  padding: 0 16px; height: 46px;
  background: #0d1117f0; backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  font: 12px var(--mono);
}
.dots { display: flex; gap: 7px; }
.dots i { width: 11px; height: 11px; border-radius: 50%; }
.r { background: #ff5f56; } .y { background: #ffbd2e; } .g { background: #27c93f; }
.vault { font-weight: 600; white-space: nowrap; }
.tabs { display: flex; align-self: end; gap: 2px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab {
  padding: 7px 14px; white-space: nowrap;
  color: var(--muted); text-decoration: none;
  border: 1px solid transparent; border-bottom: 0; border-radius: 8px 8px 0 0;
}
.tab:hover { color: var(--fg); }
.tab.active { color: var(--fg); background: var(--panel-2); border-color: var(--line); }
.ask {
  margin-left: auto; min-width: 240px;
  display: flex; align-items: center; gap: 12px;
  padding: 5px 10px 5px 12px;
  border: 1px solid var(--line); border-radius: 8px; background: #ffffff05;
}
.ask:focus-within { border-color: #b4a0ff88; }
.ask input { flex: 1; min-width: 0; background: none; border: 0; outline: 0; color: var(--fg); font: 12px var(--mono); }
.ask input::placeholder { color: var(--muted); }
kbd { font: 11px var(--mono); color: var(--fg); background: #ffffff10; border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; }

/* side panes */
.pane-title { font: 600 11px var(--mono); letter-spacing: 1.5px; text-transform: uppercase; color: var(--dim); margin: 0 0 10px; }
.files, .side {
  position: sticky; top: 46px; align-self: start;
  height: calc(100vh - 46px - 30px); overflow: auto;
  padding: 18px 12px;
}
.files { border-right: 1px solid var(--line); }
.side { border-left: 1px solid var(--line); padding: 18px; }

.tree { list-style: none; margin: 0; padding: 0; font: 13px/1.5 var(--mono); }
.tree li { padding: 4px 8px; border-radius: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tree .dir { color: var(--muted); }
.tree .in1 { padding-left: 22px; }
.tree .in2 { padding-left: 38px; }
.tree a { color: var(--fg); text-decoration: none; }
.tree .file:hover { background: #ffffff0a; }
.tree .file.active { background: #b4a0ff14; }
.tree .file.active a { color: var(--purple); }
.tree .ghost { color: var(--dim); }

/* notes */
.notes { padding: 28px 40px 40px; }
.note {
  max-width: 760px; margin: 0 auto 22px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
}
.note-path {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 9px 18px; font: 12px var(--mono); color: var(--muted);
  background: var(--panel-2); border-bottom: 1px solid var(--line);
}
.prompt { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ps1 { color: var(--green); font-weight: 600; }
.cwd { color: var(--cyan); }
.cmd { color: var(--fg); }
.meta { color: var(--dim); white-space: nowrap; }
.note-body { padding: 20px 26px 18px; }

.fm-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 150px; gap: 20px; align-items: start; padding: 20px 26px 0; }
.frontmatter {
  margin: 0; padding: 12px 16px; overflow-x: auto;
  font: 12.5px/1.75 var(--mono); color: var(--muted);
  background: #0a0d12; border: 1px solid var(--line); border-radius: 10px;
}
.frontmatter .dash { color: var(--dim); }
.frontmatter .k { color: var(--green); }
.frontmatter .v { color: var(--fg); }
.frontmatter .s { color: var(--amber); }
.embed { margin: 0; }
.embed img { width: 150px; height: 150px; object-fit: cover; border-radius: 10px; border: 1px solid var(--line); display: block; }
.embed figcaption { font: 11px var(--mono); color: var(--dim); margin-top: 6px; }

h2 { font: 700 30px/1.2 Inter, sans-serif; letter-spacing: -0.5px; color: #fff; margin: 0 0 14px; }
h2::before { content: "# "; color: var(--dim); font-family: var(--mono); font-weight: 400; }
h3 { font: 600 19px/1.3 Inter, sans-serif; color: #fff; margin: 0 0 12px; }
h3::before { content: "## "; color: var(--dim); font-family: var(--mono); font-weight: 400; }
p { margin: 0 0 12px; }
strong { color: #fff; font-weight: 600; }
em { color: var(--amber); font-style: normal; }
ul { margin: 0 0 12px; padding-left: 20px; }
li { margin: 7px 0; }
li::marker { color: var(--dim); }

.note-body a { color: var(--purple); text-decoration: none; border-bottom: 1px solid #b4a0ff40; }
.note-body a::before { content: "[["; color: var(--dim); font: .85em var(--mono); }
.note-body a::after { content: "]]"; color: var(--dim); font: .85em var(--mono); }
.note-body a:hover { background: #b4a0ff1a; border-bottom-color: var(--purple); }
.note.raw .note-body { font-size: 13.5px; }
.note.raw .note-body a { color: var(--cyan); border-bottom-color: #79c0ff33; }
.note.raw .note-body a::before { content: none; }
.note.raw .note-body a::after { content: " ↗"; }
.highlight, pre { background: none; }
.note-body pre { font: 12px/1.3 var(--mono); color: var(--green); overflow-x: auto; margin: 16px 0 0; }

.empty, .end-prompt { max-width: 760px; margin: 0 auto 16px; font: 13px/1.7 var(--mono); color: var(--muted); }
.empty a { color: var(--purple); }
.cursor { color: var(--green); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* graph, outline, tags */
.panel { margin-bottom: 26px; }
#graph {
  width: 100%; height: auto; display: block;
  background: radial-gradient(circle at 50% 50%, #b4a0ff12, transparent 70%);
  border: 1px solid var(--line); border-radius: 12px;
}
#graph .e1 { stroke: #b4a0ff55; stroke-width: 1.2; }
#graph .e2 { stroke: #ffffff1c; }
#graph .e3 { stroke: #79c0ff22; stroke-dasharray: 2 3; }
#graph .hub { fill: var(--purple); filter: drop-shadow(0 0 6px #b4a0ff); }
#graph .sec { fill: var(--cyan); transition: fill .2s; }
#graph .leaf { fill: #6b7280; }
#graph .lbl { fill: var(--muted); font: 9px var(--mono); }
#graph .hub-l { fill: #fff; font-weight: 600; }
#graph a.active .sec, #graph a:hover .sec { fill: var(--purple); }
#graph a.active .lbl, #graph a:hover .lbl { fill: #fff; }
.outline { list-style: none; margin: 0; padding: 0; font: 13px var(--mono); }
.outline li { padding: 3px 0 3px 12px; border-left: 1px solid var(--line); }
.outline li.active { border-left-color: var(--purple); }
.outline a { color: var(--fg); text-decoration: none; }
.outline li.active a, .outline a:hover { color: var(--purple); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tags span { font: 12px var(--mono); color: var(--purple); background: #b4a0ff12; border: 1px solid #b4a0ff30; padding: 2px 9px; border-radius: 999px; }

/* status bar */
.statusbar {
  grid-column: 1 / -1; position: sticky; bottom: 0; z-index: 5;
  display: flex; justify-content: flex-end; gap: 18px;
  height: 30px; align-items: center; padding: 0 16px;
  font: 11px var(--mono); color: var(--muted);
  background: #0d1117f0; border-top: 1px solid var(--line);
}
.statusbar .ok { color: var(--green); margin-right: auto; }

@media (max-width: 1180px) {
  .app { grid-template-columns: 220px minmax(0, 1fr); }
  .side { grid-column: 2; position: static; height: auto; border-left: 0; padding: 0 40px 40px; max-width: 840px; }
}
@media (max-width: 760px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .files, .ask, .dots { display: none; }
  .topbar { gap: 12px; padding: 0 12px; }
  .notes { padding: 16px 12px 8px; }
  .note-path { padding: 9px 14px; }
  .prompt { white-space: normal; }
  .side { grid-column: 1; padding: 8px 12px 24px; }
  .fm-wrap { grid-template-columns: minmax(0, 1fr); padding: 16px 16px 0; }
  .frontmatter { font-size: 11px; padding: 10px 12px; }
  .embed { order: -1; }
  .embed img { width: 104px; height: 104px; }
  .note-body { padding: 16px; }
  h2 { font-size: 24px; }
  .statusbar { justify-content: flex-start; overflow-x: auto; white-space: nowrap; }
  .statusbar .ok { margin-right: 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cursor { animation: none; }
}