/* zmk-layer-hud landing page. Its colours are the HUD's own (hud/hud.css), which are Tokyo
   Night's: the page is the panel's surroundings, not a second design. Dark only, like the panel. */
:root {
  color-scheme: dark;
  --bg: #1a1b26;
  --surface: #1f2335;
  --surface-2: #24283b;
  --code-bg: #16161e;
  --border: rgba(255, 255, 255, 0.08);
  --text: #c0caf5;
  --muted: #9aa5ce;
  --link: #7aa2f7;
  --pressed: #ffb454;                         /* the HUD's pressed key: what to act on */
  --heat: #6366f1;                            /* the heat on the HUD's dark keys (hud.css body.dark) */
  --layer: #bb9af7;
  --insert: #9ece6a;
  --raw: #f7768e;
  --cmdline: #e0af68;
  --mono: "Hack Nerd Font", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --wide: 980px;
}
* { box-sizing: border-box; }
html { background: var(--bg); scroll-padding-top: 72px; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 var(--sans); -webkit-text-size-adjust: 100%;
}
a { color: var(--link); text-underline-offset: 3px; }
a:hover { color: #9ab8ff; }
:focus-visible { outline: 2px solid var(--pressed); outline-offset: 2px; border-radius: 4px; }
code, pre, kbd, .mark, .banner, h3 { font-family: var(--mono); }
code { font-size: 0.88em; background: var(--surface-2); padding: 1px 5px; border-radius: 5px; }
b { color: #e6e8ef; }

/* ---------- header ---------- */
.top {
  position: sticky; top: 0; z-index: 2;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px max(16px, calc((100% - var(--wide)) / 2));
  background: rgba(26, 27, 38, 0.92); border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
/* The mark is the name on a rule in a layer's colour, as the section banners and the social card
   (og.html) draw it. */
.mark {
  color: #e6e8ef; font-weight: 800; text-decoration: none; letter-spacing: 0.02em;
  padding-bottom: 2px; border-bottom: 3px solid var(--layer);
}
.top nav { display: flex; gap: 18px; flex-wrap: wrap; justify-content: flex-end; }
.top nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.top nav a:hover { color: var(--text); }

/* ---------- sections ---------- */
main { padding: 0 16px; }
section { max-width: var(--wide); margin: 0 auto; padding: 56px 0 8px; }
section > p, section > ul, section > ol, section > dl, section > pre, section > .table { max-width: 760px; }
h1 {
  font: 800 clamp(30px, 5.2vw, 50px)/1.1 var(--mono); letter-spacing: -0.01em;
  margin: 0 0 18px; color: #e6e8ef;
}
.lead { font-size: 19px; color: var(--text); max-width: 760px; margin: 0 0 28px; }
/* A section's heading is drawn like the HUD's layer banner (hud.css #layer): uppercase, heavy, on
   a rule in a layer's colour. */
.banner {
  display: inline-block; margin: 0 0 18px; padding-bottom: 6px;
  font-size: 22px; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; color: #e6e8ef;
  border-bottom: 3px solid var(--rule, var(--layer));
}
#drawer { --rule: var(--link); }
#how { --rule: var(--layer); }
#draws { --rule: var(--insert); }
#setup { --rule: var(--pressed); }
#runs { --rule: var(--cmdline); }
#hack { --rule: var(--raw); }
#faq { --rule: #565f89; }
h3 { font-size: 16px; font-weight: 800; letter-spacing: 0.02em; margin: 0 0 6px; color: #e6e8ef; }

pre {
  position: relative; margin: 14px 0 18px; padding: 14px 16px; overflow-x: auto;
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px;
  font-size: 14px; line-height: 1.55; color: #c0caf5;
}
pre code { background: none; padding: 0; font-size: inherit; white-space: pre; }
.copy {
  position: absolute; top: 8px; right: 8px; padding: 2px 9px;
  font: 700 12px/20px var(--mono); color: var(--muted);
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 6px; cursor: pointer;
}
.copy:hover { color: var(--text); }
.copy.done { color: var(--insert); }

/* ---------- the demo ---------- */
.hero { padding-top: 44px; }
.demo {
  max-width: 800px; padding: 16px; margin: 0 0 26px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 18px;
}
.demo-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
}
.boards { display: flex; gap: 0 22px; flex-wrap: wrap; }
/* The boards are tabs, and so is the heat: the chosen one bright, on a rule in a layer's colour, the
   way the HUD draws the layer it is on (hud.css #layer). */
.boards button, .heat button {
  font: 700 14px/1 var(--mono); padding: 11px 0 8px; cursor: pointer;
  color: var(--muted); background: none; border: 0; border-bottom: 3px solid transparent; border-radius: 0;
}
.boards button { margin-bottom: -1px; }   /* the rule on the bar's own */
.boards button:hover, .heat button:hover { color: var(--text); }
.boards button[aria-pressed="true"], .heat button[aria-pressed="true"] { color: #e6e8ef; border-bottom-color: var(--layer); }
.heat button[aria-pressed="true"] { border-bottom-color: var(--heat); }
/* Play is a button like the code blocks' copy. */
.play {
  min-width: 72px; padding: 5px 12px; margin: 0 0 4px auto; cursor: pointer;   /* right, even alone on a row */
  font: 700 13px/20px var(--mono); color: var(--muted);
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 6px;
}
.play:hover { color: var(--text); }
.blurb { margin: 12px 2px 12px; font-size: 15px; color: var(--muted); min-height: 1.6em; }
/* The HUD's page is transparent and declares no colour scheme, so it is light. A frame whose own
   scheme differs from its document's gets an opaque canvas behind it -- a white box here -- and a
   frame left `normal` takes this page's dark: it is said light, to match. */
.frame iframe {
  display: block; width: 100%; height: 340px; border: 0; color-scheme: light;
  pointer-events: none;                    /* every control is on this page; the frame takes no focus */
}
.frame noscript img { display: block; max-width: 100%; height: auto; border-radius: 12px; }
.try { margin-top: 10px; }
.try label[for="type"] { display: block; font: 700 14px/1.4 var(--mono); color: var(--muted); margin: 0 0 6px; }
.try textarea {
  display: block; width: 100%; resize: vertical; min-height: 58px; padding: 10px 12px;
  font: 16px/1.5 var(--mono); color: var(--text);
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px;
}
.try textarea:focus { outline: 2px solid var(--pressed); outline-offset: 1px; }
.controls { display: flex; align-items: center; justify-content: space-between; gap: 12px 20px; flex-wrap: wrap; margin: 12px 0 4px; }
.toggle { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; cursor: pointer; }
.toggle input { width: 18px; height: 18px; accent-color: var(--pressed); }
.heat { display: flex; align-items: center; gap: 16px; }
.heat button { font-size: 13px; padding: 5px 0 3px; }
.heat-label { font: 700 13px var(--mono); color: var(--muted); }
.hint { font-size: 14px; color: var(--muted); margin: 10px 0 0; }
.nojs .needs-js { display: none; }

.install { max-width: 800px; }
.install > p { margin: 0; color: var(--muted); font-size: 15px; }
.install pre { margin: 8px 0 10px; }
.more { font-size: 15px; }
.more span { color: var(--muted); margin: 0 6px; }

/* ---------- how it works ---------- */
.flow { display: flex; align-items: stretch; gap: 10px; margin: 24px 0 26px; }
.node {
  flex: 1 1 0; min-width: 0; padding: 14px; border-radius: 14px;
  background: var(--surface-2); border: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 4px;
}
.node b { font: 800 15px var(--mono); letter-spacing: 0.04em; text-transform: uppercase; }
.node span { font-size: 14px; color: var(--muted); line-height: 1.4; }
.edges { flex: 1.1 1 0; min-width: 0; display: flex; flex-direction: column; justify-content: center; gap: 10px; }
.edges.one { flex: 0.8 1 0; }
.edge {
  position: relative; padding: 4px 18px 8px 4px; font-size: 13px; line-height: 1.35;
  border-bottom: 2px solid var(--muted);
}
.edge::after {
  content: ""; position: absolute; right: -2px; bottom: -6px;
  border: 5px solid transparent; border-left: 9px solid var(--muted); border-right: 0;
}
.edge span { display: block; color: var(--text); font-weight: 600; }
.edge small { display: block; color: var(--muted); font-size: 12px; }
.edge.signal { border-color: var(--layer); }
.edge.signal::after { border-left-color: var(--layer); }
.edge.hid { border-color: var(--insert); }
.edge.hid::after { border-left-color: var(--insert); }

.facts { padding-left: 20px; }
.facts li { margin: 0 0 8px; }
.table { overflow-x: auto; margin: 18px 0; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 9px 12px; border-bottom: 1px solid var(--border); }
th { font: 700 13px var(--mono); color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; }

/* ---------- what it draws ---------- */
.grid {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px;
}
.grid li { padding: 14px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; }
.grid p { margin: 0; font-size: 15px; color: var(--muted); }

/* ---------- setup ---------- */
.steps { list-style: none; padding: 0; counter-reset: step; }
.steps > li { counter-increment: step; position: relative; padding-left: 48px; margin: 0 0 22px; }
/* The step's number is drawn like the section's banner: heavy, on the section's rule. */
.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  min-width: 26px; padding-bottom: 2px; text-align: center;
  font: 800 18px/26px var(--mono); color: #e6e8ef; border-bottom: 3px solid var(--rule);
}
.steps h3 { font-size: 17px; padding-top: 3px; }

/* ---------- lists of terms ---------- */
.hosts, .faq { margin: 0; }
.hosts > div, .faq > div { padding: 12px 0; border-bottom: 1px solid var(--border); }
dt { font: 800 15px var(--mono); color: #e6e8ef; margin-bottom: 2px; }
dd { margin: 0; color: var(--text); }

footer {
  max-width: var(--wide); margin: 56px auto 0; padding: 22px 16px 40px;
  border-top: 1px solid var(--border); font-size: 14px; color: var(--muted);
}
footer p { margin: 0 0 8px; max-width: 760px; }

/* ---------- narrow screens ---------- */
@media (max-width: 720px) {
  body { font-size: 16px; }
  .top nav a:not([href^="https"]) { display: none; }
  section { padding-top: 40px; }
  .hero { padding-top: 28px; }
  .lead { font-size: 17px; }
  .demo { padding: 10px; border-radius: 14px; margin-left: -6px; margin-right: -6px; }
  .boards { gap: 0 12px; }
  .boards button { font-size: 12px; }   /* the three on one row at 375px */
  .flow { flex-direction: column; }
  .edges, .edges.one { flex: none; padding: 0 12px; }
  .edge { border-bottom: 0; border-left: 2px solid var(--muted); padding: 4px 0 4px 12px; }
  .edge::after { display: none; }
  .edge.signal { border-left-color: var(--layer); }
  .edge.hid { border-left-color: var(--insert); }
  .steps > li { padding-left: 42px; }
  pre { font-size: 12.5px; }
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}