:root {
  --bg: #fbfaf7;
  --fg: #1c1b18;
  --fg-2: #5b5852;
  --fg-3: #8d8980;
  --line: #e4e1da;
  --card: #ffffff;
  --accent: #8a4b2a;
  --accent-bg: #f5ebe4;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171614;
    --fg: #ebe8e1;
    --fg-2: #aaa59b;
    --fg-3: #77736a;
    --line: #2d2b27;
    --card: #1f1e1b;
    --accent: #d99a76;
    --accent-bg: #2a221d;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-feature-settings: 'cv11', 'ss01';
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
main { max-width: 680px; margin: 0 auto; padding: 56px 24px 80px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 500; line-height: 1.15; margin: 0; letter-spacing: -0.01em; }
h1 { font-size: 38px; }
h2 { font-size: 24px; margin: 0 0 4px; }
h3 { font-size: 18px; }
p { margin: 0 0 1em; }
ul { padding-left: 1.2em; margin: 0 0 1em; }
li { margin-bottom: 4px; }
code { font-family: var(--mono); font-size: 0.9em; }
hr { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }
.muted { color: var(--fg-2); }
.small { font-size: 14px; }

/* header */
.hdr { display: flex; gap: 24px; align-items: center; }
.photo {
  width: 104px; height: 104px; border-radius: 50%; flex-shrink: 0;
  object-fit: cover; background: var(--accent-bg); border: 1px solid var(--line);
}
.photo-fallback {
  width: 104px; height: 104px; border-radius: 50%; flex-shrink: 0;
  background: var(--accent-bg); border: 1px solid var(--line);
  display: none; align-items: center; justify-content: center; font-size: 48px;
}
.tagline { margin: 6px 0 10px; color: var(--fg-2); }
.links { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 14px; }
.links a { color: var(--fg); border-bottom: 1px solid var(--line); }
.links a:hover { text-decoration: none; border-color: var(--accent); color: var(--accent); }

/* pipeline */
.pipe {
  margin: 36px 0 8px;
  display: flex; align-items: stretch; justify-content: space-between; gap: 4px;
  font-family: var(--mono); font-size: 12px;
}
.node {
  flex: 1; display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: 12px 6px; border: 1px solid var(--line); border-radius: 10px;
  color: var(--fg-2); background: var(--card); transition: border-color .15s, color .15s;
}
.node:hover { text-decoration: none; border-color: var(--accent); color: var(--accent); }
.node .em { font-size: 26px; line-height: 1; margin-bottom: 8px; font-family: var(--sans); height: 28px; display: flex; align-items: center; }
.node .em img { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; border: 1px solid var(--line); }
.node .em.grad { font-family: var(--serif); font-size: 28px; }
.node b { font-weight: 600; color: var(--fg); }
.node:hover b { color: var(--accent); }
.node span.sub { font-size: 11px; margin-top: 2px; }
.arrow { align-self: center; color: var(--fg-3); flex: 0 0 auto; }
.voice { font-family: var(--mono); font-size: 13px; color: var(--fg-2); margin: 0; text-align: center; }
.voice .k { color: var(--fg-3); }
.more { font-family: var(--mono); font-size: 12px; text-align: center; margin: 10px 0 0; display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; }
.more a { color: var(--fg-3); }
.more a:hover { color: var(--accent); text-decoration: none; }

.logo { width: 16px; height: 16px; vertical-align: -3px; margin-right: 7px; border-radius: 3px; object-fit: contain; }
section p .logo { width: 15px; height: 15px; vertical-align: -2px; margin-right: 4px; }
.roll .tag .logo { width: 13px; height: 13px; vertical-align: -2px; margin-right: 5px; }

/* sections */
section { margin-top: 48px; scroll-margin-top: 24px; }
section a { color: inherit; text-decoration: none; border-bottom: 1px solid var(--line); }
section a:hover { color: var(--accent); border-color: var(--accent); }
.paper .meta a, .roll p a { color: var(--accent); border: 0; }
.eyebrow {
  font-family: var(--mono); font-size: 12px; color: var(--fg-3);
  letter-spacing: .04em; margin: 0 0 2px;
}
.eyebrow .em { margin-right: 6px; }
.lede { color: var(--fg-2); margin-bottom: 18px; }

.paper { margin: 0 0 22px; }
.paper h3 { margin-bottom: 4px; }
.paper .meta { font-size: 14px; color: var(--fg-3); margin-bottom: 6px; }
.paper .meta a { margin-right: 12px; }
.paper p { margin: 0; font-size: 15px; color: var(--fg-2); }

.note {
  border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0;
  padding: 12px 16px; margin-top: 8px; background: var(--card);
}
.note .lbl { font-family: var(--mono); font-size: 12px; color: var(--fg-3); margin-bottom: 4px; }
.note p { margin: 0; font-size: 15px; color: var(--fg-2); }

.roll { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.roll div { border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; background: var(--card); }
.roll b { font-weight: 600; display: block; }
.roll .tag { font-family: var(--mono); font-size: 11px; color: var(--fg-3); }
.roll p { margin: 4px 0 0; font-size: 14px; color: var(--fg-2); }

.tl { list-style: none; padding: 0; margin: 0; }
.tl li { display: grid; grid-template-columns: 130px 1fr; gap: 12px; padding: 8px 0; border-top: 1px solid var(--line); margin: 0; }
.tl li:last-child { border-bottom: 1px solid var(--line); }
.tl .d { font-family: var(--mono); font-size: 12px; color: var(--fg-3); padding-top: 4px; }
.tl b { font-weight: 600; }
.tl span { display: block; font-size: 14px; color: var(--fg-2); }

.evals { list-style: none; padding: 0; margin: 0; }
.evals li { padding: 6px 0; border-top: 1px solid var(--line); margin: 0; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.evals li:last-child { border-bottom: 1px solid var(--line); }
.evals span { color: var(--fg-2); font-size: 14px; }

/* chat */
.chat { border: 1px solid var(--line); border-radius: 12px; background: var(--card); overflow: hidden; }
.chat-log { max-height: 320px; overflow-y: auto; padding: 14px 16px; display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 88%; font-size: 14px; line-height: 1.5; padding: 8px 12px; border-radius: 10px; }
.msg.bot { background: var(--accent-bg); align-self: flex-start; }
.msg.user { background: var(--bg); border: 1px solid var(--line); align-self: flex-end; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 16px 12px; }
.chip { font-size: 12px; font-family: var(--mono); border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; cursor: pointer; color: var(--fg-2); background: none; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chat form { display: flex; border-top: 1px solid var(--line); }
.chat input { flex: 1; border: 0; background: none; padding: 12px 16px; font: inherit; font-size: 14px; color: var(--fg); outline: none; }
.chat button[type=submit] { border: 0; background: none; color: var(--accent); font-size: 18px; padding: 0 16px; cursor: pointer; }
.typing span { display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--fg-3); margin-right: 3px; animation: blink 1.2s infinite; }
.typing span:nth-child(2) { animation-delay: .2s; } .typing span:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%,80%,100% { opacity: .2 } 40% { opacity: 1 } }

footer { margin-top: 56px; font-size: 13px; color: var(--fg-3); }

/* note page */
.note-page h1 { font-size: 28px; margin-bottom: 6px; }
.note-page .byline { color: var(--fg-3); font-size: 14px; margin-bottom: 28px; }
.note-page p { font-size: 17px; font-family: var(--serif); line-height: 1.6; }
.back { font-family: var(--mono); font-size: 13px; }

@media (max-width: 560px) {
  main { padding: 36px 18px 60px; }
  h1 { font-size: 28px; }
  .hdr { gap: 16px; }
  .photo, .photo-fallback { width: 80px; height: 80px; }
  .photo-fallback { font-size: 36px; }
  .pipe { flex-wrap: wrap; }
  .node { flex: 1 1 40%; }
  .arrow { display: none; }
  .roll { grid-template-columns: 1fr; }
  .tl li { grid-template-columns: 1fr; gap: 0; }
}