@import url('https://fonts.googleapis.com/css2?family=Baloo+2:wght@600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --orange: #ff6600;
  --orange-dark: #e85500;
  --indigo: #6566ff;
  --indigo-deep: #3d3ea8;
  --ink: #1b1830;
  --ink-soft: #5b5770;
  --line: #ece9f5;
  --band: #f5f3ff;
  --paper: #ffffff;
  --mono: #8b87a0;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.65;
  font-size: 17px;
}

.shell {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px 120px;
}

/* ---------- Header "cover band" ---------- */
header.masthead {
  background: var(--band);
  margin: 0 calc(50% - 50vw) 48px;
  padding: 56px calc(50vw - 50% + 24px) 40px;
  border-bottom: 3px solid var(--orange);
}
header.masthead > * {
  max-width: 712px;
  margin-left: auto;
  margin-right: auto;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-bottom: 30px;
}
.wordmark .mark { display: block; flex-shrink: 0; }
.wordmark .word {
  font-family: "Baloo 2", sans-serif;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.01em;
  color: var(--orange);
}

h1 {
  font-family: "Baloo 2", sans-serif;
  font-weight: 700;
  font-size: 36px;
  letter-spacing: -0.005em;
  margin: 0 0 14px;
  color: var(--ink);
}

.meta {
  font-family: "Inter", sans-serif;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--indigo-deep);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.lede {
  font-size: 18px;
  color: var(--ink-soft);
  margin-top: 22px;
  max-width: 62ch;
}

.pagenav {
  display: flex;
  gap: 8px;
  margin-top: 30px;
  font-family: "Inter", sans-serif;
  font-size: 13.5px;
  font-weight: 700;
}
.pagenav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1.5px solid var(--line);
  background: var(--paper);
}
.pagenav a:hover { border-color: var(--indigo); color: var(--indigo-deep); }
.pagenav a[aria-current="page"] {
  color: #ffffff;
  background: var(--orange);
  border-color: var(--orange);
}

/* ---------- Folded-corner motif (lifted from the logo's page-fold shape) ---------- */
nav.toc, .callout {
  position: relative;
  overflow: hidden;
}
nav.toc::after, .callout::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 0; height: 0;
  border-style: solid;
  border-width: 0 20px 20px 0;
  border-color: transparent var(--orange-dark) transparent transparent;
}

nav.toc {
  font-family: "Inter", sans-serif;
  background: var(--band);
  padding: 24px 28px;
  margin: 0 0 48px;
  border: 1px solid var(--line);
}
nav.toc .toc-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--indigo-deep);
  margin-bottom: 14px;
}
nav.toc ol {
  margin: 0;
  padding-left: 20px;
  columns: 2;
  column-gap: 32px;
  font-size: 14px;
}
nav.toc li { margin-bottom: 8px; break-inside: avoid; }
nav.toc a { color: var(--ink); text-decoration: none; }
nav.toc a:hover { color: var(--orange); text-decoration: underline; }

section { margin-bottom: 44px; }

h2 {
  font-family: "Inter", sans-serif;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--indigo-deep);
  margin: 0 0 4px;
}
h2 .num {
  font-family: "Baloo 2", sans-serif;
  color: var(--orange);
  margin-right: 10px;
  font-weight: 700;
  letter-spacing: 0;
}

h3 {
  font-family: "Baloo 2", sans-serif;
  font-size: 21px;
  font-weight: 700;
  margin: 0 0 16px;
  color: var(--ink);
}

p, li { color: var(--ink); }
p { margin: 0 0 16px; }

ul, ol.plain { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 8px; }

.callout {
  border-left: 3px solid var(--orange);
  background: var(--band);
  padding: 18px 22px 18px 22px;
  font-size: 15.5px;
}
.callout p:last-child { margin-bottom: 0; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 16px 0 24px;
}
th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  font-family: "Inter", sans-serif;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--indigo-deep);
  font-weight: 700;
}

code, .placeholder {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: #f4f6f7;
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--orange-dark);
}

a { color: var(--indigo-deep); text-decoration-color: var(--indigo); }
a:hover { color: var(--orange); }

footer {
  border-top: 1px solid var(--line);
  padding-top: 28px;
  margin-top: 60px;
  font-family: "Inter", sans-serif;
  font-size: 13px;
  color: var(--mono);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
footer a { color: var(--mono); }
footer a:hover { color: var(--orange); }

@media (max-width: 560px) {
  body { font-size: 16px; }
  h1 { font-size: 28px; }
  header.masthead { padding: 40px 24px 28px; }
  nav.toc ol { columns: 1; }
  footer { flex-direction: column; }
}