/* VHRD Tech web style: product pages, shared reports, docs. Load tokens.css first (generated from palette.typ).
   Ideas from zed.dev: serif headings, one accent used sparingly, hairline rules instead of cards and shadows,
   small dense labels, buttons that look pressed in. Colours only through tokens, never hex here. */

:root {
  --font-serif: "IBM Plex Serif", Georgia, serif;
  --font-sans: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --font-logo: "Audiowide", var(--font-sans);  /* wordmark only, until the outlined SVG logo exists */
  --radius: 3px;
  --page: 72rem;
  --gutter: clamp(1rem, 4vw, 2rem);
  /* the pressed-in look: a faint inset line at the bottom edge */
  --press: inset 0 -2px 0 0 color-mix(in oklch, var(--text) 7%, transparent);
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.55 var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.015em;
  text-wrap: balance;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(2.25rem, 6vw, 3.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.125rem; }
p { margin: 0 0 1em; text-wrap: pretty; }
a { color: inherit; text-decoration-color: var(--line-strong); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--accent); }
code, kbd, pre { font-family: var(--font-mono); font-size: 0.875em; }
pre {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  overflow-x: auto;
}

/* Hero line: serif italic in the accent, the one big splash of red on a page. */
.v-hero { font-style: italic; color: var(--accent); }
.v-lead { font-size: 1.125rem; color: var(--muted); max-width: 38rem; }
.v-muted { color: var(--muted); }

/* Small mono label above headings and in cells: "SPEC", "B153 · REV B". */
.v-label {
  font: 500 0.6875rem/1.4 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Page frame: a centred column with hairline sides, sections separated by hairlines. */
.v-page {
  max-width: var(--page);
  margin: 0 auto;
  border-inline: 1px solid var(--line);
  min-height: 100vh;
}
.v-section { padding: clamp(2rem, 6vw, 4rem) var(--gutter); border-top: 1px solid var(--line); }
.v-section:first-child { border-top: 0; }

/* Ruled grid: cells share 1px rules like a spec sheet or a schematic title block. */
.v-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.v-grid > * { background: var(--bg); padding: 1.25rem; }
.v-grid > a { text-decoration: none; transition: background-color 0.15s; }
.v-grid > a:hover { background: var(--raised); }

/* Nav bar: hairline below, small text. */
.v-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.75rem var(--gutter);
  border-bottom: 1px solid var(--line);
  font-size: 0.875rem;
}
.v-nav a { text-decoration: none; color: var(--muted); }
.v-nav a:hover { color: var(--text); }
.v-nav .v-brand { color: var(--text); margin-right: auto; }

/* Wordmark set in the logo font: <span class="v-logo">VHRD <small>TECH</small></span> */
.v-logo { font-family: var(--font-logo); font-size: 1.5rem; letter-spacing: 0.02em; }
.v-logo small { font-size: 0.55em; letter-spacing: 0.2em; color: var(--muted); margin-left: 0.2em; }
.v-footer .v-logo { font-size: 1em; color: var(--text); }

/* Buttons: primary is the accent, secondary is a hairline box; both look pressed in. */
.v-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.5rem 1rem;
  font: 500 0.875rem/1.2 var(--font-sans);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--raised);
  color: var(--text);
  box-shadow: var(--press);
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.15s, background-color 0.15s;
}
.v-btn:hover { border-color: var(--accent); }
.v-btn:active { box-shadow: none; transform: translateY(1px); }
.v-btn.v-primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.v-btn.v-primary:hover { background: color-mix(in oklch, var(--accent), var(--text) 15%); }
.v-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Box with hairline border; the border turns accent on hover when it is a link. */
.v-box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--raised);
  padding: 1.25rem;
  box-shadow: var(--press);
}
a.v-box { display: block; text-decoration: none; transition: border-color 0.15s; }
a.v-box:hover { border-color: var(--accent); }

/* Tables: black header like the datasheet template, hairline rows, mono numbers. */
.v-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.v-table th {
  background: var(--text);
  color: var(--bg);
  font-weight: 500;
  text-align: left;
  padding: 0.4rem 0.75rem;
}
.v-table td { padding: 0.4rem 0.75rem; border-bottom: 1px solid var(--line); }
.v-table td.v-num { font-family: var(--font-mono); white-space: nowrap; }
.v-table-wrap { overflow-x: auto; }

/* Badge: variant marks ("Plus"), status, versions. */
.v-badge {
  display: inline-block;
  font: 500 0.6875rem/1 var(--font-mono);
  padding: 0.25em 0.5em;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--muted);
  vertical-align: middle;
}
.v-badge.v-accent { border-color: var(--accent); color: var(--accent); }

/* Signal key, same colours as the block diagrams: <span class="v-sig" style="--sig: var(--signal-usb)">USB</span> */
.v-sig { display: inline-flex; align-items: center; gap: 0.4em; font-size: 0.8125rem; }
.v-sig::before { content: ""; width: 1.25em; height: 2px; background: var(--sig, var(--signal-ctrl)); }

.v-footer {
  padding: 2rem var(--gutter);
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  color: var(--muted);
}