:root {
  color-scheme: light;
  --bg: #f6f3eb;
  --bg-elev: #fcfbf7;
  --ink: #1c1915;
  --muted: #4a453c;
  --accent: #0d5344;
  --accent-soft: #e4f2ed;
  --line: #ddd6c8;
  --code-bg: #efeadd;
  --rail: 15rem;
  --measure: 42rem;
  --gap: 3rem;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Code", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #131311;
    --bg-elev: #1c1b18;
    --ink: #f2ece4;
    --muted: #c8bfb3;
    --accent: #8fd4c4;
    --accent-soft: #1c2c28;
    --line: #34312b;
    --code-bg: #221f1b;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background:
    radial-gradient(70rem 24rem at 0% -8%, var(--accent-soft), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.6;
}

.skip {
  position: absolute;
  left: 0.75rem;
  top: 0.75rem;
  transform: translateY(-200%);
  background: var(--ink);
  color: var(--bg);
  font-family: var(--sans);
  font-size: 0.95rem;
  padding: 0.5rem 0.75rem;
  z-index: 2;
}

.skip:focus {
  transform: none;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

.hero,
.layout,
.colophon {
  width: min(60rem, calc(100% - 2rem));
  margin-inline: auto;
}

.hero {
  padding: 2.75rem 0 1.25rem;
}

.kicker,
.step-kicker,
.label,
.toc-title,
figcaption,
th,
.colophon,
nav {
  font-family: var(--sans);
}

.kicker {
  margin: 0 0 0.4rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  text-wrap: balance;
}

h1 {
  margin: 0;
  font-size: clamp(2.1rem, 4vw, 3.15rem);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.lede {
  margin: 1rem 0 0;
  max-width: 40rem;
  font-size: 1.2rem;
  line-height: 1.45;
  color: var(--muted);
}

.layout {
  display: grid;
  gap: 1.5rem;
  padding-bottom: 4rem;
}

nav {
  border-top: 2px solid var(--accent);
  padding-top: 0.75rem;
}

.toc-title {
  margin: 0 0 0.35rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

nav ol {
  list-style: none;
  margin: 0;
  padding: 0;
  columns: 2;
  column-gap: 1.25rem;
}

nav a {
  display: inline-block;
  padding: 0.28rem 0;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
  line-height: 1.35;
}

nav a:hover,
nav a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

main {
  min-width: 0;
}

section {
  scroll-margin-top: 1.25rem;
  margin: 0 0 2.75rem;
  padding: 0.35rem 0.2rem;
}

section:target {
  background: var(--accent-soft);
}

h2 {
  margin: 0 0 0.75rem;
  font-size: 1.7rem;
  letter-spacing: -0.02em;
}

h3 {
  margin: 1.4rem 0 0.45rem;
  font-size: 1.15rem;
}

h4 {
  margin: 1.15rem 0 0.35rem;
  font-size: 1.02rem;
}

p,
ul,
ol,
figure,
.table-scroll {
  margin: 0.75rem 0;
}

ul,
ol {
  padding-left: 1.25rem;
}

li + li {
  margin-top: 0.35rem;
}

.step-kicker {
  margin: 0 0 0.2rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.why {
  background: var(--accent-soft);
  padding: 0.85rem 1rem;
  margin: 0.75rem 0 1rem;
}

.label {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--bg-elev);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 0.95rem;
  line-height: 1.4;
}

caption {
  caption-side: bottom;
  padding: 0.55rem 0.75rem 0.7rem;
  text-align: left;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.85rem;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 0.65rem 0.75rem;
}

thead th {
  border-bottom: 2px solid var(--ink);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

tbody th {
  font-weight: 700;
}

tbody tr + tr th,
tbody tr + tr td {
  border-top: 1px solid var(--line);
}

figure {
  margin: 1rem 0;
}

figcaption {
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
}

pre {
  margin: 0;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  background: var(--code-bg);
  border: 1px solid var(--line);
  line-height: 1.45;
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
}

pre code {
  font-size: 0.84rem;
}

p code,
li code,
td code {
  padding: 0.05em 0.28em;
  background: var(--code-bg);
}

.note {
  padding-left: 0.9rem;
  border-left: 3px solid var(--accent);
}

.sheet {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 0.25rem 1.1rem 1.1rem;
}

.checks {
  list-style: none;
  padding: 0;
  margin: 0.4rem 0 0.2rem;
}

.checks li {
  position: relative;
  padding: 0.4rem 0 0.4rem 1.85rem;
  border-bottom: 1px solid var(--line);
}

.checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.95rem;
  height: 0.95rem;
  border: 1.5px solid var(--accent);
  border-radius: 2px;
  background: var(--bg);
}

.colophon {
  padding: 0 0 3rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.colophon p {
  margin: 0.3rem 0;
}

@media (max-width: 24rem) {
  nav ol {
    columns: 1;
  }
}

@media (min-width: 62rem) {
  .hero {
    padding-top: 3.5rem;
  }

  .layout {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    column-gap: var(--gap);
    align-items: start;
  }

  nav {
    position: sticky;
    top: 1.25rem;
    max-height: calc(100vh - 2.5rem);
    overflow: auto;
    padding-right: 0.5rem;
  }

  nav ol {
    columns: 1;
  }
}

@page {
  margin: 0.6in;
}

@media print {
  body {
    background: #fff;
    color: #000;
    font-size: 11pt;
  }

  .skip,
  nav,
  .colophon {
    display: none;
  }

  .hero,
  .layout,
  .colophon {
    width: auto;
  }

  a {
    color: #000;
    text-decoration: none;
  }

  section:target {
    background: transparent;
    box-shadow: none;
  }

  .why,
  pre,
  .table-scroll,
  .sheet {
    background: #fff;
  }

  #checklist {
    break-before: page;
    margin: 0;
    padding: 0;
  }

  #checklist .step-kicker,
  #checklist h2 {
    margin-bottom: 0.15rem;
  }

  #checklist .why {
    margin: 0.15rem 0 0.35rem;
    padding: 0.1rem 0;
    background: transparent;
  }

  #checklist .sheet {
    padding: 0;
    border: 0;
    background: transparent;
  }

  #checklist h3 {
    margin: 0.45rem 0 0.05rem;
    font-size: 11pt;
  }

  #checklist .checks {
    margin: 0;
  }

  #checklist .checks li {
    font-size: 10pt;
    line-height: 1.25;
    padding-top: 0.08rem;
    padding-bottom: 0.08rem;
  }

  .checks li::before {
    border-color: #000;
  }
}