:root {
  color-scheme: dark;
  --bg: #000;
  --text: #ededed;
  --muted: #a1a1a1;
  --dim: #8f8f8f;
  --line: rgba(255, 255, 255, 0.14);
  --line-strong: rgba(255, 255, 255, 0.28);
  --panel: #0a0a0a;
  --chip: #1a1a1a;
  --hover: #141414;
  --selected: #1f1f1f;
  --link: #52a8ff;
  --purple: #c792ea;
  --sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 24px;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); }
a:focus-visible,
summary:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }

.skip {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 10;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--text);
  color: var(--bg);
  text-decoration: none;
}
.skip:focus { top: 16px; }

/* layout */
.shell { display: flex; flex-wrap: wrap; align-items: flex-start; min-height: 100vh; }
.sidebar {
  flex: 1 1 240px;
  padding: 24px 16px 32px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.main { flex: 999 1 560px; min-width: 0; padding: 24px 32px 80px; }
.col { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 28px; }

/* Side-by-side layout needs 240px + 560px of room plus the scrollbar; below
   that the sidebar wraps onto its own row and must not stick. */
@media (min-width: 840px) {
  .sidebar { flex: 0 0 240px; position: sticky; top: 0; max-height: 100vh; overflow-y: auto; }
}
@media (max-width: 520px) {
  .main { padding: 16px 16px 64px; }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* sidebar */
.brand-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 0 10px; }
.brand { font-size: 22px; font-weight: 600; letter-spacing: -0.04em; color: var(--text); text-decoration: none; }
.tools { display: flex; gap: 14px; align-items: center; }
.tools a { display: flex; color: var(--muted); }
.tools a:hover { color: var(--text); }

.nav { display: flex; flex-direction: column; gap: 2px; font-size: 14px; line-height: 20px; }
.nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 7px;
  color: var(--muted);
  text-decoration: none;
}
.nav a:hover { background: var(--hover); color: var(--text); }
.nav a[aria-current="page"] { background: var(--selected); color: var(--text); }
.nav .caret { font-size: 12px; display: inline-block; transform: rotate(90deg); }
.nav .sub {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 2px 0 2px 16px;
  padding-left: 8px;
  border-left: 1px solid var(--line);
}
.nav .sub a { padding: 6px 10px; }

/* top bar + on this page */
.topbar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; min-height: 40px; }
.crumb { font-family: var(--mono); font-size: 11px; color: var(--dim); }

.toc { position: relative; width: 240px; max-width: 100%; }
.toc summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  font-size: 14px;
  line-height: 20px;
  cursor: pointer;
}
.toc summary::-webkit-details-marker { display: none; }
.toc summary span { display: flex; align-items: center; gap: 10px; }
.toc[open] summary svg:last-child { transform: rotate(180deg); }
.toc-menu {
  position: absolute;
  z-index: 5;
  top: 46px;
  left: 0;
  right: 0;
  padding: 6px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  font-size: 14px;
}
.toc-menu a { padding: 8px 10px; border-radius: 7px; color: var(--text); text-decoration: none; }
.toc-menu a:hover { background: var(--chip); }

/* logo */
.logo { display: block; width: 100%; height: auto; margin: 20px 0 28px; }
.logo-face { fill: #e6e6e6; }
.logo-dither rect { fill: #ededed; }

/* prose */
p { margin: 0; }
.intro { display: flex; flex-direction: column; gap: 18px; }
section { display: flex; flex-direction: column; gap: 18px; scroll-margin-top: 24px; }
h2 {
  margin: 12px 0 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  line-height: 32px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.anchor {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 5px;
  background: var(--chip);
  color: var(--muted);
}
.anchor:hover { color: var(--text); }
ul.plain, ol.plain { margin: 0; padding-left: 22px; display: flex; flex-direction: column; gap: 10px; }
.plain a { overflow-wrap: anywhere; }
.tip::before {
  content: "tip";
  margin-right: 10px;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--chip);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
}
.code-wrap { position: relative; }
.code.scroll { max-height: 640px; overflow: auto; }
.copy {
  position: absolute;
  top: 10px;
  right: 14px;
  z-index: 1;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--chip);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
}
.copy:hover { color: var(--text); border-color: var(--line-strong); }
.copy:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }
details.fold summary { cursor: pointer; color: var(--muted); font-size: 14px; }
details.fold[open] summary { margin-bottom: 12px; }
b { font-weight: 600; }

code.inline,
.tag {
  font-family: var(--mono);
  background: var(--chip);
  border-radius: 5px;
}
code.inline { font-size: 14.4px; padding: 2px 6px; }

/* code blocks */
.code {
  margin: 0;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 24px;
  overflow-x: auto;
  white-space: pre;
}
.code .cmd { color: var(--purple); }
.code .dim { color: var(--dim); }
.code a { text-decoration: none; }
.code a:hover { text-decoration: underline; }

/* project cards */
.cards { display: flex; flex-direction: column; gap: 12px; }
.card {
  display: block;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: inherit;
  text-decoration: none;
  scroll-margin-top: 24px;
}
a.card:hover,
.card:target { background: var(--panel); border-color: var(--line-strong); }
.card-head { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 4px 16px; }
.card-name { display: inline-flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 15px; color: var(--link); }
.app-icon { flex: none; width: 28px; height: 28px; border-radius: 7px; border: 1px solid var(--line); object-fit: cover; }
.card-name sup { margin-left: 3px; font-size: 10px; color: var(--dim); }
.card-meta { font-family: var(--mono); font-size: 12px; color: var(--dim); }
.card-desc { margin: 8px 0 14px; font-size: 15px; line-height: 22px; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-size: 12px; padding: 2px 8px; }
.card-note { margin: 14px 0 0; font-family: var(--mono); font-size: 12px; line-height: 18px; color: var(--dim); }

/* about table */
.facts { border: 1px solid var(--line); border-radius: 10px; background: var(--panel); overflow: hidden; font-size: 14px; line-height: 20px; }
.fact { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 16px; padding: 12px 20px; }
.fact + .fact { border-top: 1px solid var(--line); }
.fact dt { font-family: var(--mono); font-size: 13px; color: var(--dim); }
.fact dd { margin: 0; }
.facts dl { margin: 0; }

/* footer */
footer {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--dim);
}
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--text); }

/* lead line + badges (lat.md-style status pills) */
.lead { font-size: 20px; line-height: 30px; font-weight: 500; letter-spacing: -0.01em; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; }
.badge { display: inline-flex; font-family: var(--mono); font-size: 11px; line-height: 20px; border-radius: 4px; overflow: hidden; }
.badge span { padding: 0 8px; }
.badge .k { background: #2e2e2e; color: var(--muted); }
.badge .v { background: #3d3d3d; color: var(--text); }
.badge .dot { display: inline-block; width: 6px; height: 6px; margin-right: 6px; border-radius: 50%; background: #3fb950; vertical-align: 1px; }

/* evidence strip */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--line);
  overflow: hidden;
}
.stat { padding: 16px 20px; background: var(--panel); }
.stat b { display: block; font-family: var(--mono); font-size: 26px; line-height: 32px; font-weight: 500; letter-spacing: -0.02em; }
.stat span { display: block; margin-top: 4px; font-size: 13px; line-height: 18px; color: var(--muted); }
.note { font-family: var(--mono); font-size: 12px; line-height: 18px; color: var(--dim); }
.note a { color: var(--muted); }

/* card lists (experience) */
.card ul { margin: 12px 0 14px; padding-left: 18px; display: flex; flex-direction: column; gap: 6px; font-size: 14px; line-height: 21px; color: var(--muted); }
.card-role { margin: 6px 0 0; font-size: 15px; line-height: 22px; }

/* contact reveal */
.reveal {
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  color: var(--link);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.reveal:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }

/* case study pages */
.back { font-size: 14px; }
.nav .back-link { color: var(--muted); }
h1.title { margin: 8px 0 0; font-size: 36px; line-height: 44px; font-weight: 600; letter-spacing: -0.03em; }
h3 { margin: 8px 0 0; font-size: 18px; line-height: 26px; font-weight: 600; letter-spacing: -0.01em; }
.callout { font-size: 14px; line-height: 22px; color: var(--muted); }
.callout b { color: var(--text); font-weight: 600; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 20px; }
th, td { padding: 10px 24px 10px 0; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { font-family: var(--mono); font-size: 12px; font-weight: 400; color: var(--dim); white-space: nowrap; }
td.num { font-family: var(--mono); white-space: nowrap; }
.findings { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 18px; }
.findings li { font-size: 16px; line-height: 24px; color: var(--muted); }
.findings b { display: block; margin-bottom: 2px; color: var(--text); font-weight: 600; }