:root {
  --sky: #e8f0fa;
  --paper: #ffffff;
  --ink: #111d33;
  --ink-soft: #4a5a75;
  --rule: #cbd8eb;
  --yellow: #ffc61a;
  --red: #d8392b;
  --blue: #2f6fe0;

  --display: "Bowlby One", "Arial Black", Impact, sans-serif;
  --text: "Figtree", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --sky: #0e1729;
    --paper: #16233c;
    --ink: #eaf1fc;
    --ink-soft: #a2b3cf;
    --rule: #263a5c;
    --red: #ff5a47;
    --blue: #74a3ff;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --sky: #0e1729;
  --paper: #16233c;
  --ink: #eaf1fc;
  --ink-soft: #a2b3cf;
  --rule: #263a5c;
  --red: #ff5a47;
  --blue: #74a3ff;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; }

body {
  background: var(--sky);
  color: var(--ink);
  font: 17px/1.65 var(--text);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); text-underline-offset: 3px; }
a:focus-visible { outline: 3px solid var(--yellow); outline-offset: 3px; border-radius: 4px; }

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding-left: max(18px, env(safe-area-inset-left, 0px));
  padding-right: max(18px, env(safe-area-inset-right, 0px));
}

header .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-block: 18px;
}
.logo { font: 400 22px/1 var(--display); color: var(--ink); text-decoration: none; }
.logo span { color: var(--red); }
.back { font-weight: 700; font-size: 15px; text-decoration: none; }

.tape { height: 14px; background: repeating-linear-gradient(-45deg, var(--yellow) 0 14px, #111d33 14px 28px); }

main .wrap { padding-block: 48px 72px; }
h1 { font: 400 clamp(38px, 8vw, 64px)/1 var(--display); margin: 0; text-wrap: balance; }
.updated { font: 500 12.5px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); margin: 14px 0 28px; }
.intro { font-size: 19px; }

nav.toc {
  margin: 32px 0 8px;
  padding: 18px 20px;
  background: var(--paper);
  border: 1.5px solid var(--rule);
  border-radius: 16px;
}
nav.toc p { margin: 0 0 8px; font: 500 12.5px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }
nav.toc ol { margin: 0; padding-left: 20px; columns: 2 220px; column-gap: 28px; }
nav.toc li { margin: 3px 0; break-inside: avoid; }

h2 {
  font-size: 22px;
  font-weight: 800;
  margin: 44px 0 10px;
  scroll-margin-top: 20px;
}
p { margin: 0 0 12px; }
ul { margin: 8px 0 14px; padding-left: 22px; }
li { margin: 7px 0; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15.5px;
  background: var(--paper);
  border-radius: 14px;
  overflow: hidden;
}
.table { overflow-x: auto; margin: 12px 0 16px; border: 1.5px solid var(--rule); border-radius: 14px; }
th, td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--rule); }
th { font: 500 12px/1.2 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); }
tr:last-child td { border-bottom: 0; }
td:first-child { font-weight: 700; min-width: 150px; }

.contact {
  margin-top: 44px;
  padding: 22px 24px;
  background: var(--ink);
  color: var(--sky);
  border-radius: 18px;
}
.contact h2 { margin: 0 0 6px; color: var(--sky); }
.contact p { margin: 0; color: color-mix(in srgb, var(--sky) 80%, transparent); }
.email { user-select: all; overflow-wrap: anywhere; font-weight: 800; color: var(--yellow); }

footer .wrap {
  padding-block: 28px 40px;
  border-top: 1.5px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  color: var(--ink-soft);
  font-size: 15px;
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .intro { font-size: 17.5px; }
}