/* FONTS
   Every word in the PDF is outlined; the only embedded face,
   NewsGothicBT-BoldExtraCondensed (700), sets the section titles and
   run-in labels. The rest judged by eye off the renders:
   NewsGothic Bold Extra Condensed -> Oswald 700 (section titles, WARNING:/CAUTION:)
   warning banner, a lighter extra-condensed cap -> Oswald 500
   NewsGothic Condensed body      -> Roboto Condensed 400 (italic for the closing line)
   NewsGothic Bold Condensed subs -> Roboto Condensed 700
   Cover lettering (NDR-5, Owner's Manual) is Helvetica Bold -> Arial/Helvetica 700 */
@import url("https://fonts.googleapis.com/css2?family=Oswald:wght@500;700&family=Roboto+Condensed:ital,wght@0,400;0,700;1,400;1,700&display=swap");

:root {
  --ink: #231f20; /* body text, rules, the cover's ground and the warning banner */
  --accent: #db5533; /* the cover's ATLANTIC circle: links, the guide note */
  --paper: #f4f2f1; /* tint behind the sources banner */
  --head: "Oswald", "Arial Narrow", sans-serif;
  --body: "Roboto Condensed", "Arial Narrow", sans-serif;
  --cover: Arial, Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
  margin-top: 0;
}

body {
  color: var(--ink);
  background: #fff;
  font-family: var(--body);
  font-size: 1.05em;
  margin: 0;
}
p,
li {
  line-height: 1.5;
}
main {
  margin-left: 20vw;
  padding-bottom: 3em;
}
img {
  max-width: 100%;
  height: auto;
}
figure {
  margin: 0;
}
a {
  color: var(--accent);
  text-decoration: none;
}
a:hover,
a:active {
  text-decoration: underline;
}

/* MASTHEAD: the cover on its own ground beside the product photo */
#masthead {
  display: flex;
  flex-wrap: wrap;
  min-height: 18em;
}
#masthead .brand-panel {
  flex: 0 0 32%;
  min-width: 16em;
  background: var(--ink);
  color: #fff;
  padding: 1.5em 2em 2em;
}
#masthead h1 {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  margin: 0;
  font-size: 1em;
}
#masthead h1 .logo {
  width: 7em;
}
#masthead h1 .series {
  font: 400 0.85em var(--cover);
  margin-top: 0.25em;
}
#masthead h1 .wordmark {
  align-self: center;
  width: min(100%, 16em);
  margin-top: 1.25em;
}
#masthead .product-panel {
  flex: 1 1 60%;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  text-align: right;
  padding: 2em 3em;
}
#masthead .photo {
  width: min(20em, 100%);
  margin-bottom: 1em;
}
#masthead .model {
  font: 700 2.6em var(--cover);
  margin: 0;
}
#masthead .doc-type {
  font: 700 1.3em var(--cover);
  margin: 0.2em 0 0;
}

/* HEADINGS: bold extra-condensed title over a hairline rule */
.flow h2 {
  font-family: var(--head);
  font-weight: 700;
  font-size: 2.1em;
  line-height: 1.15;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 0.1em;
  margin: 0 0 0.75em;
}
.flow h2.banner {
  background: var(--ink);
  color: #fff;
  border: 0;
  font-weight: 500;
  font-size: 1.45em;
  text-align: center;
  text-transform: uppercase;
  text-wrap: balance;
  padding: 0.35em 0.5em;
}
.flow h2.banner span {
  display: block;
}
.flow h3 {
  font-weight: 700;
  font-size: 1.3em;
  margin: 0 0 0.3em;
}
.flow h4 {
  font-weight: 700;
  font-size: 1em;
  margin: 0.9em 0 0.15em;
}
.flow h3,
.flow h4 {
  break-after: avoid;
}
/* set in the section-title face in print, not as a sub-head */
#features {
  font-family: var(--head);
  font-size: 1.6em;
}
.half-container > header + * {
  margin-top: 0;
}

/* SIDE NAVIGATION */
#side-nav {
  width: 20vw;
  background: #fff;
  position: fixed;
  z-index: 5;
  height: 100%;
  overflow-y: auto;
  border-right: 1px solid rgba(35, 31, 32, 0.15);
}
.nav-container {
  display: flex;
  flex-direction: column;
  margin: 1em 1em 2em;
}
.nav-container h3 {
  font-family: var(--head);
  font-size: 1.4em;
  margin-bottom: 1rem;
}
.nav-container h4,
#toc-mobile h4 {
  font-size: 1em;
  font-weight: 700;
  margin: 0.6em 0 0.2em;
}
.nav-container h5,
#toc-mobile h5 {
  font-size: 0.95em;
  font-weight: 400;
  margin: 0.2em 0 0.2em 1em;
}
.nav-container a,
#toc-mobile a {
  color: var(--ink);
}
#toc-mobile h2 {
  font-family: var(--head);
}

/* CONTAINERS */
.flex-container {
  display: flex;
  padding-left: 2em;
}
.half-container {
  padding: 0 1em;
  width: 100%;
  columns: 2 30rem;
  column-gap: 3em;
}
.half-container > header {
  column-span: all;
}
.no-columns {
  columns: auto !important;
}
.flow p,
.flow li,
.keep-together {
  break-inside: avoid;
}
section + section {
  margin-top: 2.5em;
}
.flow > * + * {
  margin-bottom: 1em;
}

.doc-update {
  background: var(--paper);
  border-left: 4px solid var(--accent);
  padding: 1em 1.25em;
  margin: 2em 1em;
  line-height: 1.5;
}
.doc-update > strong {
  display: block;
  font-family: var(--head);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* SAFETY: ruled boxes, triangle icons, numbered list */
.warn-box {
  border: 1px solid var(--ink);
  padding: 0.5em 0.75em;
}
.warn-box p {
  margin: 0;
}
.warn-box strong {
  font-family: var(--head);
  font-weight: 700;
}
.icon-note {
  display: flex;
  align-items: center;
  gap: 0.9em;
}
.icon-note img {
  width: 3em;
  flex: 0 0 auto;
}
.safety-list {
  padding-left: 1.4em;
}
.safety-list li + li {
  margin-top: 0.35em;
}
.closing {
  text-align: center;
  font-style: italic;
  font-size: 1.35em;
  line-height: 1.3;
}
.closing strong {
  display: block;
  text-transform: uppercase;
}

/* CONTROL PANEL / I/O JACKS: sticky photo beside the part descriptions */
.panel-layout {
  display: grid;
  grid-template-columns: minmax(14em, 20em) 1fr;
  gap: 2.5em;
  align-items: start;
}
.panel-layout > figure {
  position: sticky;
  top: 1em;
}
.panel-layout > figure img {
  width: 100%;
}
.parts {
  columns: 2 16em;
  column-gap: 2.5em;
}
.part {
  break-inside: avoid;
  margin-bottom: 1.5em;
}
.part.long {
  break-inside: auto;
}
.part p {
  margin: 0 0 0.6em;
}
.part-icon {
  display: block;
  margin: 0.15em 0 0.4em 1.5em;
}
.polarity {
  width: auto;
  height: 1.2em;
  vertical-align: middle;
}

/* CONNECTION METHODS */
.connection-intro {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5em 2.5em;
}
.connection-intro figure {
  flex: 0 1 26em;
}
.connection-intro p {
  flex: 1 1 16em;
}
.wide-figure {
  margin: 0.3em 0 1.75em;
}

/* INSIDE ROUTING: block diagram over three step photos */
.steps {
  counter-reset: step;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 1.5em 3.5em;
  padding: 0;
  margin: 1.25em 0 2.5em 2em;
}
.steps li {
  text-align: center;
  max-width: 12em;
}
.steps img {
  display: block;
  width: auto;
  height: 11em;
  margin: 0 auto 0.5em;
}
.steps p {
  margin: 0;
}
.steps p::before {
  counter-increment: step;
  content: counter(step) ". ";
}
.parallel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5em 3em;
  margin: 1em 0 0 2em;
}
.parallel figure {
  text-align: center;
}
.parallel figcaption {
  margin-top: 0.4em;
}
.parallel .switch {
  width: auto;
  height: 11em;
}

/* SPECIFICATIONS */
.spec-list {
  list-style-type: "- ";
  padding-left: 0.9em;
}
.fine-print {
  font-size: 0.85em;
}
.compliance {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1em 2.5em;
  margin-top: 2em;
}
.compliance p {
  margin: 0;
}

/* FIRMWARE UPGRADE: from the separate update guide */
.guide-note {
  border-left: 3px solid var(--accent);
  padding-left: 1.25em;
}
.guide-note ol ol {
  list-style-type: upper-alpha;
  padding-left: 1.4em;
}
.guide-note li {
  margin-bottom: 0.35em;
}
.guide-note a {
  overflow-wrap: anywhere;
}

footer {
  margin-left: 20vw;
  text-align: center;
  padding: 2em 1em;
  font-size: 0.9em;
}

@media (max-width: 900px) {
  .flex-container {
    flex-direction: column;
    padding-left: 0;
  }
  .half-container {
    width: 100%;
    padding: 0;
  }
  nav#side-nav {
    display: none;
  }
  main,
  footer {
    margin: 0 auto;
  }
  main {
    padding: 0 1em 3em;
  }
  #masthead {
    flex-direction: column;
    margin: 0 -1em;
  }
  #masthead .brand-panel,
  #masthead .product-panel {
    flex-basis: auto;
    width: 100%;
    align-items: center;
    text-align: center;
  }
  #masthead h1 {
    align-items: center;
  }
  .doc-update {
    margin: 1.5em 0;
  }
  .flow h2.banner {
    font-size: 1.1em;
  }
  /* cable labels stay legible: the diagram scrolls instead of shrinking */
  .wide-figure {
    overflow-x: auto;
  }
  .wide-figure img {
    min-width: 700px;
  }
  .panel-layout {
    grid-template-columns: 1fr;
  }
  .panel-layout > figure {
    position: static;
    width: 100%;
    max-width: 20em;
    margin: 0 auto;
  }
  .guide-note {
    padding-left: 1em;
  }
  .steps,
  .parallel {
    margin-left: 0;
    justify-content: center;
  }
  #toc-mobile {
    display: block;
    padding: 0 0 1em;
  }
}

@media (min-width: 901px) {
  #toc-mobile {
    display: none;
  }
}