/* BE Voice Features: the public page of what BE Voice can do (capabilities only). */
/* Layout: sticky top bar, section menu on the left, one reading column; the menu folds above the content on phones. */
:root {
  --bg: #f6f8fa; --panel: #ffffff; --panel2: #eef2f5; --line: #dde3e9; --line2: #c9d2db;
  --ink: #1d252e; --bright: #0b1218; --muted: #5d6874; --soft: #44505c;
  --accent: #0b8db0; --accent-tint: rgba(11, 141, 176, .10);
  --ok: #1f8f4e; --warn: #a86b00;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --sans: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a0d12; --panel: #0d1117; --panel2: #10151c; --line: #1b222b; --line2: #2a333f;
    --ink: #d7dde5; --bright: #eef2f6; --muted: #7d8794; --soft: #a9b3bf;
    --accent: #5fd3f0; --accent-tint: rgba(95, 211, 240, .10);
    --ok: #43d17a; --warn: #f5b942; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0a0d12; --panel: #0d1117; --panel2: #10151c; --line: #1b222b; --line2: #2a333f;
  --ink: #d7dde5; --bright: #eef2f6; --muted: #7d8794; --soft: #a9b3bf;
  --accent: #5fd3f0; --accent-tint: rgba(95, 211, 240, .10);
  --ok: #43d17a; --warn: #f5b942; color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
img { max-width: 100%; }
body { background: var(--bg); color: var(--ink); font: 15px/1.6 var(--sans); margin: 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
code { font: 13px/1.4 var(--mono); background: var(--panel2); border: 1px solid var(--line); border-radius: 3px; padding: 1px 5px; color: var(--bright); overflow-wrap: anywhere; }
pre { margin: 0; }
pre code { display: block; padding: 12px 14px; overflow-x: auto; overflow-wrap: normal; white-space: pre; border-radius: 6px; }

.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; display: flex; align-items: center; gap: 16px;
  padding: 10px 20px; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(6px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: baseline; gap: 10px; white-space: nowrap; }
.brand b { font: 700 15px/1 var(--sans); color: var(--bright); letter-spacing: .02em; }
.brand span { font: 500 10px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.search { margin-left: auto; position: relative; width: min(340px, 50vw); }
.search input { width: 100%; font: 14px var(--sans); color: var(--bright); background: var(--panel); border: 1px solid var(--line2); border-radius: 4px; padding: 7px 10px; }
.hits { font: 500 11px/1 var(--mono); color: var(--muted); white-space: nowrap; }

.wrap { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 40px; max-width: 1180px; margin: 0 auto; padding-inline: 20px; }
.toc { position: sticky; top: 60px; align-self: start; max-height: calc(100vh - 70px); overflow-y: auto; padding-block: 24px; }
.toc a { display: block; font: 500 11.5px/1.3 var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--soft);
  padding: 8px 10px; border-left: 2px solid transparent; }
.toc a:hover { color: var(--bright); background: var(--panel); text-decoration: none; }
.toc a.on { color: var(--accent); border-left-color: var(--accent); background: var(--panel); }
.toc a.dim { opacity: .35; }
.toc .grp { font: 500 10px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); padding: 18px 10px 6px; }

main { padding-block: 24px 80px; min-width: 0; }
.hero { padding-block: 16px 8px; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
.eyebrow { font: 500 11px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
h1 { font: 700 34px/1.15 var(--sans); color: var(--bright); margin: 10px 0 12px; letter-spacing: -.015em; text-wrap: balance; }
.lead { font-size: 17px; color: var(--soft); max-width: 68ch; margin: 0 0 16px; }
section { padding-block: 28px 8px; border-bottom: 1px solid var(--line); scroll-margin-top: 60px; }
section[hidden] { display: none; }
h2 { font: 600 22px/1.25 var(--sans); color: var(--bright); margin: 0 0 6px; text-wrap: balance; }
h2 .n { font: 500 12px/1 var(--mono); color: var(--muted); margin-right: 10px; vertical-align: 3px; }
h3 { font: 600 13px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--bright); margin: 26px 0 8px; }
p, li { max-width: 72ch; }
p { margin: 8px 0; }
ul, ol { padding-left: 20px; margin: 8px 0; }
li { margin: 3px 0; }
.where { font: 12.5px/1.5 var(--mono); color: var(--muted); margin: 6px 0 2px; }
.where b { color: var(--soft); font-weight: 500; }

.tbl { overflow-x: auto; margin: 12px 0; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { font: 500 10.5px/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); text-align: left;
  padding: 9px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; background: var(--panel2); }
td { padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
td:first-child { white-space: nowrap; }
.num { font-variant-numeric: tabular-nums; }

.note { border: 1px solid var(--line2); border-radius: 6px; background: var(--panel); padding: 12px 14px; margin: 14px 0; max-width: 78ch; }
.note.dev { border-color: var(--accent); background: var(--accent-tint); }
.note b:first-child { font: 600 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); display: block; margin-bottom: 6px; }
.tag { font: 500 10px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; border: 1px solid var(--line2); border-radius: 3px; padding: 3px 6px; color: var(--soft); vertical-align: 2px; margin-left: 6px; white-space: nowrap; }
.tag.dev { color: var(--accent); border-color: var(--accent); }
.tag.lab { color: var(--warn); border-color: var(--warn); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; margin: 14px 0; }
.cards.c4 { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
.card { border: 1px solid var(--line); border-radius: 6px; background: var(--panel); padding: 12px 14px; }
.card b { display: block; color: var(--bright); font-weight: 600; margin-bottom: 2px; }
.card span { font-size: 13.5px; color: var(--soft); }
.shot { margin: 18px 0 8px; }
.shot a { display: block; cursor: zoom-in; }
.shot img { display: block; width: 100%; height: auto; border: 1px solid var(--line2); border-radius: 8px; background: #0a0d12; }
.shot figcaption { font: 12.5px/1.5 var(--sans); color: var(--muted); margin-top: 8px; }
.shot figcaption b { font: 500 10.5px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-right: 6px; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 300px); gap: 28px; align-items: start; }
.split .shot { margin-top: 4px; }
.shot-pair { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
@media (max-width: 860px) { .split, .shot-pair { grid-template-columns: minmax(0, 1fr); } }
.mermaid { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 12px; overflow-x: auto; }
mark { background: var(--accent-tint); color: inherit; outline: 1px solid var(--accent); border-radius: 2px; }
.empty { padding: 40px 0; color: var(--muted); }

@media (max-width: 860px) {
  .wrap { grid-template-columns: minmax(0, 1fr); gap: 0; padding-inline: 16px; }
  .toc { position: static; max-height: none; display: flex; flex-wrap: nowrap; overflow-x: auto; gap: 2px; padding-block: 10px; border-bottom: 1px solid var(--line); }
  .toc .grp { display: none; }
  .toc a { white-space: nowrap; border-left: 0; border-bottom: 2px solid transparent; }
  .toc a.on { border-bottom-color: var(--accent); }
  .top { padding-inline: 16px; gap: 10px; }
  .brand span { display: none; }
  h1 { font-size: 27px; }
  section { scroll-margin-top: 110px; }
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

/* Tables whose first column is running text (the developers' guide) */
.rules td:first-child { white-space: normal; }
.rules td:last-child { vertical-align: top; }