:root {
  color-scheme: dark;
  --bg: #0a0a0a;
  --surface: #111111;
  --surface-raised: #161616;
  --text: #f4f1e9;
  --muted: #aaa8a1;
  --subtle: #7f7e78;
  --line: rgba(244, 241, 233, 0.14);
  --line-strong: rgba(244, 241, 233, 0.26);
  --accent: #c8ff38;
  --accent-ink: #101400;
  --amber: #ffc53d;
  --red: #ff6b57;
  --page: min(100% - 2rem, 76rem);
  --radius: 1.25rem;
  --shadow: 0 1.5rem 5rem rgba(0, 0, 0, 0.38);
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
code, kbd, pre { font-family: var(--mono); font-size: 0.92em; }
pre { padding: 0.9rem 1.1rem; border-radius: 0.75rem; border: 1px solid var(--line); background: var(--surface-raised); overflow-x: auto; }
pre code { background: none; padding: 0; }
code { background: rgba(200, 255, 56, 0.09); padding: 0.12em 0.35em; border-radius: 0.3em; }

::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.skip-link {
  position: fixed; z-index: 100; top: 0.75rem; left: 0.75rem;
  padding: 0.65rem 0.9rem; border-radius: 0.5rem;
  background: var(--accent); color: var(--accent-ink); font-weight: 750;
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.wrap { width: var(--page); margin-inline: auto; }

/* ---------- hero ---------- */
.hero { padding-block: clamp(4rem, 10vh, 8rem) clamp(2rem, 5vh, 4rem); }
.eyebrow {
  color: var(--subtle);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  margin-block-end: 0.9rem;
}
h1 {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  letter-spacing: -0.035em;
  line-height: 1.04;
  margin: 0 0 1.1rem;
  text-wrap: balance;
  max-width: 18ch;
}
.pitch { color: var(--muted); max-width: 52ch; font-size: 1.08rem; margin-block-end: 1.2rem; }
.badges { color: var(--muted); font-size: 0.92rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-block: 1.6rem 2.4rem; }
.cta-row.center { justify-content: center; }

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 1.35rem; border-radius: 0.7rem;
  font-weight: 700; border: 1px solid transparent;
  transition: transform 120ms ease, background-color 120ms ease, border-color 120ms ease;
}
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { transform: translateY(-1px); background: #d4ff62; }
.btn.ghost { border-color: var(--line-strong); color: var(--text); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn.big { font-size: 1.05rem; padding: 0.85rem 1.7rem; }

.hero-fig { position: relative; margin: 0; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); }
.hero-fig img { width: 100%; }
.hero-fig figcaption { position: absolute; inset-inline-start: 0; inset-block-start: 0; padding: 0.55rem 0.9rem; color: var(--text); font-size: 0.82rem; background: rgba(10, 10, 10, 0.72); border-end-end-radius: 0.6rem; }

/* ---------- sections ---------- */
section { padding-block: clamp(3rem, 9vh, 6rem); }
section + section { border-block-start: 1px solid var(--line); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); letter-spacing: -0.03em; line-height: 1.15; margin: 0 0 1.6rem; text-wrap: balance; }
h3 { font-size: 1.12rem; margin: 0 0 0.45rem; letter-spacing: -0.01em; }
.section-note { color: var(--subtle); font-size: 0.88rem; margin-block: -0.8rem 1.4rem; }

/* why */
.why-grid { display: grid; gap: 2rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); }
.why-grid p { color: var(--muted); margin: 0; }
.why-grid .eyebrow { margin-block-end: 0.4rem; }

/* demo / videos */
.video-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); overflow: hidden; box-shadow: var(--shadow);
}
.video-head { padding: 0.85rem 1.1rem; border-block-end: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 0.35rem 0.6rem; align-items: baseline; }
.video-head a { color: var(--accent); }
video { width: 100%; background: #000; aspect-ratio: 16 / 9; }
.transcript { margin: 0; padding: 1.1rem 1.3rem 1.3rem; counter-reset: step; list-style: none; display: grid; gap: 0.4rem; }
.transcript li { counter-increment: step; color: var(--muted); padding-inline-start: 2rem; position: relative; font-size: 0.94rem; }
.transcript li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono); color: var(--accent); font-size: 0.8rem;
  position: absolute; left: 0; top: 0.22em;
}

/* features */
.feat-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr)); }
.feat-grid article {
  border: 1px solid var(--line); border-radius: 0.9rem;
  padding: 1.15rem 1.25rem; background: var(--surface);
}
.feat-grid h3 code { color: var(--accent); background: none; padding: 0; font-size: 1.02em; }
.feat-grid p { color: var(--muted); margin: 0; font-size: 0.95rem; }

/* trust */
.negations { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; max-width: 58ch; }
.negations li { padding-inline-start: 1.9rem; position: relative; color: var(--muted); }
.negations li::before {
  content: "✕"; position: absolute; left: 0; top: 0.05em;
  color: var(--red); font-weight: 800; font-family: var(--mono);
}

/* install */
.install-grid { display: grid; gap: 2.5rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr)); align-items: start; }
.install-grid h3 { margin-block-start: 1.6rem; }
.dim { color: var(--subtle); }
.mono { font-family: var(--mono); }

/* final */
.final { text-align: center; padding-block: clamp(4rem, 11vh, 7rem); }
.final .pitch { margin-inline: auto; }
.final h2 { max-width: none; }

footer { border-block-start: 1px solid var(--line); padding-block: 1.6rem 2.2rem; }
.foot { display: flex; flex-wrap: wrap; gap: 0.4rem 1.6rem; align-items: baseline; font-size: 0.9rem; color: var(--muted); }
.foot a:hover { color: var(--accent); }

/* reveal-on-scroll */
[data-reveal] { opacity: 0; transform: translateY(14px); }
[data-reveal].is-visible { opacity: 1; transform: none; transition: opacity 480ms ease, transform 480ms cubic-bezier(0.16, 1, 0.3, 1); }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

@media (max-width: 40rem) {
  .cta-row .btn { width: 100%; justify-content: center; }
}