/* Fonts: ArialMT/ArialNarrow -> system sans (Arial/Helvetica, already the PDF's own face),
   Impact (cover title) -> system Impact, both ship on every major OS so no webfont load. */

:root {
  --ink: #000;
  --line: #6d6e71;   /* hairline rules, secondary text */
  --paper: #d1d3d4;  /* callout background, cover ground */
  --font-body: Arial, Helvetica, sans-serif;
  --font-narrow: "Arial Narrow", Arial, sans-serif;
  --font-display: Impact, "Arial Narrow Bold", "Franklin Gothic Bold", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: #fff;
  line-height: 1.4;
}

a { color: var(--ink); }

#side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 20vw;
  height: 100%;
  overflow-y: auto;
  border-right: 1px solid var(--line);
  padding: 1em;
}

#side-nav h3 {
  text-transform: uppercase;
  font-size: 0.9em;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 0.3em;
}

#side-nav h4, #side-nav h5 { font-weight: normal; font-size: 0.9em; margin: 0.5em 0; }
#side-nav h5 { margin-left: 1em; font-size: 0.85em; }
#side-nav a { color: inherit; text-decoration: none; }
#side-nav a:hover { text-decoration: underline; }

main { margin-left: 20vw; }

#masthead {
  padding: 2em 2em 2em 3em;
}

#masthead .flex-container { align-items: center; gap: 2em; }

#masthead h1 { margin: 0 0 0.2em; }
#masthead h1 img { display: block; width: 220px; height: auto; }

#masthead .title {
  font-family: var(--font-display);
  font-weight: normal;
  text-transform: uppercase;
  line-height: 1.05;
  margin: 0.6em 0 0;
}
#masthead .title strong { display: block; font-size: 2.6em; }
#masthead .title span { display: block; font-size: 1.6em; }

#masthead .photo { max-width: 260px; }
#masthead .photo img { width: 100%; height: auto; }

section { padding: 2em 2em 0 3em; }
section + section { margin-top: 1em; }
section:last-of-type { padding-bottom: 2em; }

.flex-container { display: flex; }
.half-container { width: 100%; padding: 0 1em; }
.half-container > header { column-span: all; }

.flow { columns: 2 26rem; column-gap: 3em; }
.flow.no-columns { columns: auto; }
.flow > * + * { margin-bottom: 1em; }

p, li { break-inside: avoid; }
h2, h3 { break-after: avoid; }
.keep-together { break-inside: avoid; }

h2 {
  text-transform: uppercase;
  font-weight: bold;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 0.2em;
  margin: 0 0 0.6em;
}

h3 {
  text-transform: uppercase;
  font-weight: bold;
  margin: 1em 0 0.3em;
}

.callout {
  background: var(--paper);
  padding: 1em 1.25em;
  margin: 1em 0;
}
.callout h3 { margin-top: 0; text-align: center; }

.notice {
  border: 2px solid var(--ink);
  border-radius: 10px;
  padding: 1em 1.25em;
  margin: 1em 0;
}
.notice-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  font-weight: bold;
  font-size: 1.2em;
  margin-bottom: 0.6em;
}
.notice-title img { width: 28px; height: 28px; }
.notice p { margin: 0.6em 0; }

figure { margin: 1em 0; }
figure img { width: 100%; height: auto; display: block; }
figcaption { font-family: var(--font-narrow); font-style: italic; font-size: 0.9em; margin-top: 0.4em; }

.panel-grid {
  column-span: all;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16em, 1fr));
  gap: 2em;
  margin-bottom: 1em;
}
.panel-figure {
  position: relative;
  width: 100%;
  max-width: 260px;
  margin-bottom: 0.75em;
}
.panel-figure img { position: absolute; top: 0; left: 0; width: 100%; height: auto; display: block; }
.callout-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}
.callout-svg line { stroke: var(--ink); stroke-width: 1; stroke-dasharray: 2 2; }
.callout-dot {
  position: absolute;
  transform: translate(-50%, -50%);
  width: 1.4em;
  height: 1.4em;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85em;
}
.panel-card ol {
  list-style: none;
  counter-reset: item;
  margin: 0;
  padding: 0;
}
.panel-card ol[start="4"] { counter-reset: item 3; }
.panel-card li {
  counter-increment: item;
  display: flex;
  gap: 0.6em;
  margin-bottom: 0.6em;
}
.panel-card li::before {
  content: counter(item);
  flex-shrink: 0;
  width: 1.4em;
  height: 1.4em;
  border: 1px solid var(--ink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85em;
}
.panel-card li strong { display: block; }

#toc-mobile { display: none; }

footer {
  margin-left: 20vw;
  border-top: 1px solid var(--line);
  padding: 1.5em 2em 1.5em 3em;
  font-family: var(--font-narrow);
  font-size: 0.9em;
  color: var(--line);
}

@media (max-width: 900px) {
  #side-nav { display: none; }
  main, footer { margin-left: 0; }
  #masthead .flex-container { flex-direction: column; align-items: flex-start; }
  section { padding: 1.5em 1.25em 0; }
  footer { padding: 1.5em 1.25em; }
  .flex-container { flex-direction: column; }
  .half-container { width: 100%; padding: 0; }
  #toc-mobile { display: block; }
}
@media (min-width: 901px) {
  #toc-mobile { display: none; }
}