/* Omnisible site. One stylesheet, system fonts, no framework.
   ponytail: tokens on :root; dark mode by prefers-color-scheme only. */

:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --bg-soft: #f3f7fc;
  --fg: #141a22;
  --fg-muted: #4b5563;
  --line: #d9e1ec;
  --accent: #0b5fd6;        /* 5.9:1 on white */
  --accent-fg: #ffffff;
  --focus: #0b5fd6;
  --max: 68rem;
  --measure: 62ch;
  --radius: 14px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.125rem);
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116;
    --bg-soft: #161b23;
    --fg: #e8edf3;
    --fg-muted: #a7b1bf;
    --line: #2a3340;
    --accent: #7ab8ff;      /* 8.9:1 on #0e1116 */
    --accent-fg: #0b1a2e;
    --focus: #7ab8ff;
  }
}

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

html { background: var(--bg); }
body {
  margin: 0;
  color: var(--fg);
  background: var(--bg);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

img, svg { display: block; max-width: 100%; height: auto; }

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.01em; margin: 0 0 0.5em; text-wrap: balance; }
h1 { font-size: clamp(2rem, 1.4rem + 2.6vw, 3.25rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.1rem); font-weight: 650; }
h3 { font-size: 1.15rem; font-weight: 650; }
p, li { max-width: var(--measure); }
p { margin: 0 0 1em; }
ul { padding-left: 1.2em; }
li + li { margin-top: 0.35em; }

.muted { color: var(--fg-muted); }
.lede { font-size: 1.2em; color: var(--fg-muted); }

.wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Skip link */
.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--accent);
  color: var(--accent-fg);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  z-index: 10;
  font-weight: 600;
}
.skip:focus { top: 1rem; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
  flex-wrap: wrap;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--fg);
  text-decoration: none;
  padding: 0.5rem 0;
}
.brand svg { width: 1.6rem; height: 1.6rem; color: var(--accent); }
.site-nav ul { list-style: none; display: flex; gap: 0.25rem; margin: 0; padding: 0; flex-wrap: wrap; }
.site-nav a {
  display: inline-block;
  padding: 0.65rem 0.8rem;       /* ≥44px target */
  min-height: 44px;
  color: var(--fg);
  text-decoration: none;
  border-radius: 8px;
}
.site-nav a:hover { background: var(--bg-soft); text-decoration: underline; }
.site-nav a[aria-current="page"] { font-weight: 650; text-decoration: underline; }

/* Sections */
main { flex: 1; }
section { padding-block: clamp(2.5rem, 2rem + 3vw, 5rem); }
section + section { border-top: 1px solid var(--line); }
.soft { background: var(--bg-soft); }

.hero { padding-block: clamp(3rem, 2rem + 6vw, 7rem); }
.hero .lede { max-width: 54ch; }
.cta-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.5rem; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  font-weight: 650;
  text-decoration: none;
  border: 2px solid var(--accent);
  color: var(--accent);
  background: transparent;
}
.button.primary { background: var(--accent); color: var(--accent-fg); }
.button:hover { text-decoration: underline; }

.grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
  margin-top: 1.5rem;
}
.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.soft .card { background: var(--bg); }
.card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }

.product {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: auto 1fr;
  align-items: start;
}
.product img { width: 5.5rem; border-radius: 22%; }
@media (max-width: 30rem) { .product { grid-template-columns: 1fr; } }

.badge {
  display: inline-block;
  font-size: 0.85em;
  font-weight: 650;
  padding: 0.15em 0.6em;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--fg-muted);
  vertical-align: middle;
}

dl.facts { display: grid; grid-template-columns: max-content 1fr; gap: 0.5rem 1.25rem; margin: 1rem 0 0; }
dl.facts dt { font-weight: 650; }
dl.facts dd { margin: 0; max-width: var(--measure); }
@media (max-width: 36rem) { dl.facts { grid-template-columns: 1fr; } dl.facts dd { margin-bottom: 0.5rem; } }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 2rem;
  color: var(--fg-muted);
  font-size: 0.95em;
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; align-items: center; }
.site-footer ul { list-style: none; display: flex; gap: 1.25rem; flex-wrap: wrap; margin: 0; padding: 0; }
.site-footer a { color: inherit; display: inline-block; padding: 0.6rem 0; min-height: 44px; }
.site-footer ul { gap: 0.25rem 1.25rem; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}