:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #101820;
  --muted: #3c4a5a;
  --accent: #0a6b2d;
  --line: #c9d1d9;
  --card: #f3f6f8;
  --focus: #d97706;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --fg: #33ff66;
    --muted: #b8ffcc;
    --accent: #33ff66;
    --line: #1f7a3a;
    --card: #071a0c;
    --focus: #ffd166;
  }
}
:root[data-theme="light"] {
  --bg: #ffffff; --fg: #101820; --muted: #3c4a5a; --accent: #0a6b2d;
  --line: #c9d1d9; --card: #f3f6f8; --focus: #d97706;
}
:root[data-theme="dark"] {
  --bg: #000000; --fg: #33ff66; --muted: #b8ffcc; --accent: #33ff66;
  --line: #1f7a3a; --card: #071a0c; --focus: #ffd166;
}

* { box-sizing: border-box; }
html { font-size: 112.5%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.55;
}
a { color: var(--accent); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 4px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--fg); color: var(--bg); }

.skip {
  position: absolute; left: -999px; top: 0;
  padding: .6rem 1rem; background: var(--bg); color: var(--fg);
  border: 2px solid var(--fg); z-index: 10;
}
.skip:focus { left: 1rem; top: 1rem; }

.wrap { max-width: 68rem; margin: 0 auto; padding: 0 1.25rem; }

header.top {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1rem 0; border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: .75rem; font-weight: 700; font-size: 1.35rem; text-decoration: none; color: var(--fg); }
.brand svg { width: 3.2rem; height: auto; }
.theme {
  font: inherit; font-size: .95rem; padding: .5rem .9rem; cursor: pointer;
  background: var(--card); color: var(--fg); border: 2px solid var(--line); border-radius: .5rem;
}
.theme:hover { border-color: var(--fg); }

.hero {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 2.5rem; align-items: center; padding: 3rem 0 2rem;
}
.hero picture, .hero img { display: block; width: 100%; max-width: 22rem; height: auto; margin: 0 auto; }
.hero h1 { font-size: clamp(2.4rem, 6vw, 3.6rem); line-height: 1.05; margin: 0 0 1rem; letter-spacing: -.01em; }
.slogan { font-size: clamp(1.35rem, 3vw, 1.75rem); font-weight: 600; line-height: 1.3; margin: 0 0 1rem; }
.sub { font-size: 1.15rem; color: var(--muted); margin: 0; }

section { padding: 2rem 0; border-top: 1px solid var(--line); }
h2 { font-size: 1.9rem; line-height: 1.15; margin: 0 0 1.25rem; }
h3 { font-size: 1.35rem; line-height: 1.2; margin: 0 0 .5rem; }

.features { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 46rem) { .features { grid-template-columns: 1fr 1fr; } }
.features > li { background: var(--card); border: 1px solid var(--line); border-radius: .75rem; padding: 1.25rem 1.4rem; }
.features > li.wide { grid-column: 1 / -1; }
.features p { margin: 0 0 .75rem; }
.features p:last-child { margin-bottom: 0; }

.examples { margin: .75rem 0; padding-left: 1.4rem; }
.examples li { margin: .25rem 0; }
q { font-style: italic; }
strong.key { text-decoration: underline; text-decoration-thickness: 3px; text-underline-offset: .18em; }

.stats { list-style: none; margin: .75rem 0 0; padding: 0; display: grid; gap: .75rem; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); }
.stats li { border: 1px solid var(--line); border-radius: .5rem; padding: .75rem .9rem; }
.stats .n { display: block; font-size: 1.8rem; font-weight: 700; line-height: 1.1; font-variant-numeric: tabular-nums; }
.stats .l { display: block; color: var(--muted); }
.stats-note { color: var(--muted); font-size: .95rem; margin: .75rem 0 0; }

.soon { background: var(--card); border: 2px solid var(--accent); border-radius: .75rem; padding: 1.5rem 1.75rem; margin: 0; }
.soon p { margin: 0 0 .75rem; font-size: 1.15rem; }
.soon p:last-child { margin-bottom: 0; }

footer { border-top: 1px solid var(--line); padding: 1.5rem 0 2.5rem; color: var(--muted); }
footer ul { list-style: none; margin: .5rem 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; }

@media (max-width: 46rem) {
  .hero { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 1.5rem; text-align: left; }
  .hero picture, .hero img { max-width: 15rem; }
  html { font-size: 106%; }
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
@media print {
  .theme, .skip { display: none; }
  body { background: #fff; color: #000; }
}