:root {
  --bg: #0e1014;
  --panel: #161a21;
  --line: #2a303b;
  --ink: #eceef2;
  --dim: #98a2b3;
  --accent: #ffb454;
  --err: #ff8a80;
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: ui-monospace, 'Cascadia Mono', Consolas, monospace;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.65 var(--font);
}
main {
  flex: 1;
  padding: 36px 0 60px;
}
.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 22px;
}
header {
  border-bottom: 1px solid var(--line);
}
header .wrap {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding-top: 12px;
  padding-bottom: 12px;
}
header nav {
  justify-self: end;
}
.fp img {
  display: block;
  height: 96px;
  width: auto;
  filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.2));
}
@media (max-width: 640px) {
  header .wrap {
    grid-template-columns: 1fr auto;
    row-gap: 6px;
  }
  .fp {
    grid-column: 2;
    grid-row: 1;
  }
  .fp img {
    height: 64px;
  }
  header nav {
    grid-column: 1 / -1;
    justify-self: start;
  }
  nav a:first-child {
    margin-left: 0;
  }
}
.brand {
  font-weight: 800;
  font-size: 21px;
  color: var(--accent);
  text-decoration: none;
}
nav a {
  margin-left: 22px;
  color: var(--ink);
  text-decoration: none;
}
nav a:hover,
a:hover {
  text-decoration: underline;
}
a {
  color: var(--accent);
}
footer {
  border-top: 1px solid var(--line);
  padding: 20px 0;
  color: var(--dim);
  font-size: 14px;
}
h1 {
  font-size: clamp(30px, 5.5vw, 48px);
  line-height: 1.1;
  margin: 0 0 14px;
}
h2 {
  font-size: 19px;
  margin: 26px 0 6px;
}
.grid h2,
.buy h2 {
  margin-top: 0;
}
.lead {
  font-size: 20px;
  color: #cfd5e0;
  max-width: 640px;
}
.small {
  color: var(--dim);
  font-size: 14px;
}
.hero {
  padding: 28px 0 10px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin: 34px 0;
}
.grid > div,
.buy {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
}
.grid > div.wide {
  grid-column: 1 / -1;
  border-color: var(--accent, #ffb454);
}
.grid p {
  margin: 0;
  color: #cfd5e0;
  font-size: 15px;
  line-height: 1.55;
}
.buy {
  margin-top: 10px;
}
.btn {
  display: inline-block;
  padding: 10px 20px;
  margin: 0 8px 8px 0;
  font: 600 16px var(--font);
  color: var(--ink);
  background: #232a35;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1204;
}
.btn:disabled {
  opacity: 0.5;
  cursor: default;
}
label {
  display: block;
  margin: 14px 0;
  color: var(--dim);
}
input {
  display: block;
  width: 100%;
  max-width: 440px;
  margin-top: 6px;
  padding: 10px 12px;
  font: 17px var(--mono);
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.serial {
  font: 600 24px var(--mono);
  letter-spacing: 0.04em;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 18px;
  display: inline-block;
}
.code {
  width: 100%;
  font: 13px var(--mono);
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
}
code {
  font: 13px var(--mono);
  word-break: break-all;
}
.err {
  color: var(--err);
}
ul {
  padding-left: 22px;
}
li {
  margin: 6px 0;
}

/* ---------- documentation: manual, spec sheet, example setups ---------- */
.doc {
  max-width: 780px;
}
.doc h1 {
  font-size: clamp(28px, 4.5vw, 40px);
}
.doc h2 {
  font-size: 22px;
  margin: 40px 0 10px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}
.doc h3 {
  font-size: 17px;
  margin: 24px 0 6px;
  color: var(--accent);
}
.doc section {
  scroll-margin-top: 16px;
}
.doc code {
  word-break: normal;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
}
kbd {
  font: 13px var(--mono);
  background: #232a35;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 6px;
}
.toc {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 6px 20px 10px;
  margin: 24px 0;
}
.toc h2 {
  border: 0;
  margin: 10px 0 4px;
  font-size: 17px;
}
.toc ol {
  columns: 2 240px;
  margin: 0;
  padding-left: 22px;
}
.toc li {
  margin: 3px 0;
}
.note {
  background: var(--panel);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  font-size: 15px;
}
.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 10px 0 16px;
  font-size: 15px;
  line-height: 1.5;
}
.doc th,
.doc td {
  text-align: left;
  vertical-align: top;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}
.doc th {
  width: 30%;
  color: var(--ink);
  font-weight: 600;
}
.doc table.compact th {
  width: auto;
  white-space: nowrap;
}
.doc td {
  color: #cfd5e0;
}
dl.parts dt,
dl.qa dt {
  font-weight: 600;
  margin-top: 14px;
}
dl.parts dd,
dl.qa dd {
  margin: 4px 0 0;
  color: #cfd5e0;
}
ul.cards {
  list-style: none;
  padding: 0;
}
ul.cards li {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 18px;
  margin: 12px 0;
  color: #cfd5e0;
  font-size: 15px;
}
ul.cards b {
  font-size: 17px;
}
.crumb {
  margin: 0 0 6px;
  font-size: 14px;
}
.crumb a::before {
  content: '\2190\00a0';
}
.trademarks {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}
.docs-links {
  margin: 0 0 16px;
}
svg.dia {
  width: 100%;
  height: auto;
  margin: 18px 0 8px;
}
svg.dia rect {
  fill: var(--panel);
  stroke: var(--line);
  stroke-width: 1.5;
}
svg.dia text {
  fill: var(--ink);
  font: 600 15px var(--font);
}
svg.dia text.lbl {
  fill: var(--dim);
  font: 400 12px var(--font);
  paint-order: stroke;
  stroke: var(--panel);
  stroke-width: 5px;
  stroke-linejoin: round;
}
svg.dia path {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
}
svg.dia path.dash {
  stroke-dasharray: 6 5;
}
svg.dia path.ah {
  fill: var(--accent);
  stroke: none;
}

@media print {
  :root {
    --bg: #fff;
    --panel: #f4f5f7;
    --line: #c9ced6;
    --ink: #111;
    --dim: #555;
    --accent: #9a5a00;
  }
  body {
    font-size: 11pt;
    line-height: 1.45;
  }
  header nav,
  .fp,
  .noprint,
  .crumb,
  footer {
    display: none;
  }
  .toc {
    break-inside: avoid;
  }
  header {
    border-bottom: 1px solid var(--line);
  }
  main {
    padding: 12px 0;
  }
  .wrap {
    max-width: none;
    padding: 0;
  }
  .doc {
    max-width: none;
  }
  .doc td,
  .grid p,
  dl.parts dd,
  dl.qa dd,
  ul.cards li,
  .lead {
    color: #222;
  }
  a {
    color: #111;
    text-decoration: none;
  }
  kbd {
    background: #fff;
  }
  .doc h2 {
    break-after: avoid;
  }
  .doc table,
  .note,
  svg.dia,
  dl.qa dd {
    break-inside: avoid;
  }
  /* The spec sheet fits on two pages. */
  .specsheet {
    font-size: 9.5pt;
  }
  .specsheet h1 {
    font-size: 22pt;
    margin-bottom: 4px;
  }
  .specsheet .lead {
    font-size: 11pt;
    margin: 0 0 4px;
  }
  .specsheet h2 {
    font-size: 12pt;
    margin: 12px 0 4px;
    padding-top: 4px;
  }
  .specsheet table {
    margin: 2px 0 4px;
    font-size: 9.5pt;
  }
  .specsheet th,
  .specsheet td {
    padding: 3px 6px;
  }
  .specsheet th {
    width: 24%;
  }
}
@page {
  margin: 14mm 14mm 16mm;
}

/* Free and Pro, on the home page */
#free-pro table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.45;
}
#free-pro th,
#free-pro td {
  text-align: left;
  vertical-align: top;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}
#free-pro td:first-child {
  color: var(--ink);
}
#free-pro td + td {
  color: #cfd5e0;
  width: 22%;
}
#free-pro th {
  color: var(--accent);
  font-weight: 600;
}

/* bot trap on the news form: off screen, never seen or focused by a person */
.hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}