*, *::before, *::after { box-sizing: border-box; }
body {
  font-family: Georgia, "Noto Serif", serif;
  font-size: 19px;
  line-height: 1.45;
  color: #1a1a1a;
  background: #fff;
  margin: 0;
  padding: 0;
  font-kerning: auto;
}
.layout {
  display: grid;
  grid-template-columns: 210px 1fr;
  min-height: 100vh;
}
nav {
  background: #f5f5f0;
  border-right: 1px solid #e0e0d8;
  padding: 2rem 1.25rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.5;
}
nav a { display: block; padding: 0.2rem 0; color: #444; text-decoration: none; }
nav a:hover { color: #000; text-decoration: underline; }
nav .breadcrumb { font-size: 12px; color: #888; margin-bottom: 1rem; }
main {
  padding: 3rem 4rem 4rem;
  max-width: 68ch;
}
h1 { font-size: 1.7rem; line-height: 1.2; margin-top: 0; margin-bottom: 1.5rem; font-weight: bold; }
h2 { font-size: 1.15rem; line-height: 1.3; margin-top: 2.5rem; margin-bottom: 0.5rem; font-weight: bold; }
h3 { font-size: 1rem; margin-top: 1.5rem; margin-bottom: 0.25rem; font-weight: bold; }
p { margin: 0 0 0.9rem; }
ul, ol { margin: 0 0 0.9rem; padding-left: 1.5rem; }
li { margin-bottom: 0.3rem; }
table { border-collapse: collapse; width: 100%; margin: 1.5rem 0; font-size: 0.9rem; }
th, td { border: 1px solid #ccc; padding: 0.4rem 0.75rem; text-align: left; }
th { background: #f5f5f0; font-weight: bold; }
pre { background: #f5f5f0; border: 1px solid #e0e0d8; border-radius: 3px; padding: 1rem; overflow-x: auto; margin: 1.5rem 0; }
code { font-family: "SFMono-Regular", Consolas, monospace; font-size: 0.85em; }
p code, li code { background: #f0f0ea; padding: 0.1em 0.35em; border-radius: 2px; }
a { color: #1a1a1a; }
a:hover { color: #000; }
/* Mobile drawer nav (CSS-only checkbox hack). Desktop is untouched:
   every element below is display:none outside the media query. */
.nav-toggle, .nav-toggle-label, .nav-overlay { display: none; }
@media (max-width: 720px) {
  .layout { display: block; }
  nav {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: min(260px, 85vw);
    padding-top: 3.75rem;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    z-index: 20;
  }
  .nav-toggle:checked ~ nav { transform: translateX(0); box-shadow: 2px 0 8px rgba(0,0,0,0.15); }
  .nav-toggle {
    display: block;
    position: fixed;
    top: 0.75rem; left: 0.75rem;
    width: 2.25rem; height: 2.25rem;
    margin: 0;
    opacity: 0;
    z-index: 31;
    cursor: pointer;
  }
  .nav-toggle-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    position: fixed;
    top: 0.75rem; left: 0.75rem;
    width: 2.25rem; height: 2.25rem;
    background: #f5f5f0;
    border: 1px solid #e0e0d8;
    border-radius: 3px;
    z-index: 30;
    cursor: pointer;
  }
  .nav-toggle-label span {
    display: block;
    width: 18px; height: 2px;
    background: #444;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }
  .nav-toggle:checked ~ .nav-toggle-label span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-toggle-label span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .nav-toggle-label span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-toggle:focus-visible ~ .nav-toggle-label { outline: 2px solid #1a1a1a; outline-offset: 2px; }
  .nav-overlay {
    display: block;
    position: fixed;
    top: 0; right: 0; bottom: 0; left: 0;
    background: rgba(0,0,0,0.35);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
    z-index: 10;
  }
  .nav-toggle:checked ~ .nav-overlay { opacity: 1; pointer-events: auto; }
  main { padding: 4rem 1.25rem 3rem; max-width: none; }
  table { display: block; overflow-x: auto; }
  main code { overflow-wrap: anywhere; }
  @media (prefers-reduced-motion: reduce) {
    nav, .nav-overlay, .nav-toggle-label span { transition: none; }
  }
}