:root {
  color-scheme: light;
  --ink: #141414;
  --muted: #64625d;
  --line: #d8d2c5;
  --paper: #fbfaf6;
  --panel: #f2efe7;
  --accent: #b13d22;
  --accent-dark: #772817;
  --code: #eee8db;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.62;
}
a { color: var(--accent-dark); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.home, .skill-page {
  min-height: 100vh;
  max-width: 980px;
  margin: 0 auto;
  padding: 8vh 24px 12vh;
}
.eyebrow {
  margin: 0 0 24px;
  color: var(--accent-dark);
  font: 700 13px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0;
  text-transform: uppercase;
}
h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(56px, 11vw, 124px);
  line-height: .88;
  letter-spacing: 0;
}
.dek {
  max-width: 640px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 26px;
  line-height: 1.25;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}
.actions a, .book-actions a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  border: 1px solid var(--ink);
  padding: 8px 14px;
  color: var(--ink);
  text-decoration: none;
  font: 700 13px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-transform: uppercase;
}
.actions a:first-child {
  background: var(--ink);
  color: var(--paper);
}
.thesis {
  margin-top: 72px;
  max-width: 760px;
  border-top: 2px solid var(--ink);
  padding-top: 26px;
  font-size: 24px;
  line-height: 1.36;
}
.reader-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
}
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  border-right: 1px solid var(--line);
  background: var(--panel);
  padding: 22px;
}
.brand {
  display: block;
  margin-bottom: 20px;
  color: var(--ink);
  font: 800 15px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-transform: uppercase;
  text-decoration: none;
}
nav a {
  display: block;
  padding: 7px 0;
  color: var(--muted);
  font: 13px/1.25 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-decoration: none;
}
nav a:hover { color: var(--accent-dark); }
.toc-l1 { color: var(--ink); font-weight: 800; margin-top: 8px; }
.toc-l2 { padding-left: 10px; }
.book {
  max-width: 820px;
  padding: 48px 28px 96px;
  margin: 0 auto;
}
.book-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 44px;
}
.book h1 {
  font-size: clamp(44px, 8vw, 84px);
  line-height: .95;
  margin-bottom: 24px;
}
.book h2 {
  margin-top: 68px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 34px;
  line-height: 1.1;
}
.book h3 {
  margin-top: 34px;
  font-size: 22px;
  line-height: 1.2;
}
.book p, .book li, .skill-page p, .skill-page li {
  font-size: 19px;
}
blockquote {
  margin: 28px 0;
  border-left: 4px solid var(--accent);
  padding: 10px 0 10px 18px;
  color: var(--accent-dark);
  background: #f7f0e8;
  font-weight: 700;
}
.part {
  color: var(--accent-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 18px !important;
  text-transform: uppercase;
}
.table-wrap {
  overflow-x: auto;
  margin: 28px 0;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  background: #fffdf8;
}
th, td {
  border: 1px solid var(--line);
  padding: 9px 10px;
  vertical-align: top;
}
th {
  text-align: left;
  background: var(--code);
}
pre {
  overflow-x: auto;
  padding: 18px;
  background: var(--code);
  border: 1px solid var(--line);
}
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .9em;
}
.back {
  display: inline-block;
  margin-bottom: 34px;
  font: 800 13px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-transform: uppercase;
}
@media (max-width: 860px) {
  .reader-layout { display: block; }
  .sidebar {
    position: relative;
    height: auto;
    max-height: 42vh;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .book { padding-top: 28px; }
  .book-actions { position: sticky; top: 0; background: var(--paper); padding: 10px 0; }
}