:root {
  --bg: #09090b;
  --bg-alt: #111113;
  --card: #1c1c1f;
  --text: #fafafa;
  --muted: #a1a1aa;
  --orange: #ff8000;
  --orange-ink: #1a0d00;
  --line: #2a2a2e;
  --blue: #1877f2;
  --max: 1100px;
  --header: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Open Sans", "Segoe UI", sans-serif;
  line-height: 1.6;
}
img { max-width: 100%; height: auto; }
a { color: var(--orange); }
h1, h2, h3 { font-family: Montserrat, "Segoe UI", sans-serif; line-height: 1.15; }
h2 { color: var(--orange); font-size: clamp(1.8rem, 3vw, 2.4rem); }
h3 { margin-bottom: 0.4rem; }
p { color: #e4e4e7; }

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--orange);
  color: var(--orange-ink);
  padding: 0.5rem 0.8rem;
}
.skip:focus { top: 0.5rem; }

.poc-banner {
  margin: 0;
  padding: 0.45rem 1rem;
  background: #3f2a00;
  color: #ffe0b0;
  text-align: center;
  font-size: 0.85rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header);
  padding: 0.7rem 4vw;
  background: #fff;
  border-bottom: 1px solid #e4e4e7;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}
.brand img { display: block; }
.site-nav { display: flex; gap: 1.1rem; align-items: center; }
.site-nav a {
  color: #111;
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.site-nav a:hover, .site-nav a:focus-visible { color: var(--orange); }
.nav-toggle {
  display: none;
  background: transparent;
  color: #111;
  border: 1px solid #d4d4d8;
  border-radius: 0.4rem;
  padding: 0.4rem 0.7rem;
}

.hero, .section { padding: 4.5rem 4vw; }
.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
  min-height: 70vh;
  background:
    radial-gradient(circle at 70% 40%, rgba(255, 128, 0, 0.12), transparent 28%),
    var(--bg);
}
.hero h1 { font-size: clamp(2.2rem, 5vw, 4.2rem); margin: 0 0 1rem; }
.hero-art img { width: 100%; }
.section-alt { background: var(--bg-alt); }
.narrow { max-width: 820px; margin: 0 auto; }
.narrow h2, .reviews h2, .product h2, .amazon h2, .lessons h2 { text-align: center; }

.author {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 2rem;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}
.author-photo { width: 100%; border-radius: 0.4rem; filter: grayscale(1); }
blockquote {
  margin: 0 0 1rem;
  color: var(--muted);
  font-style: italic;
}

.lessons { max-width: 1200px; margin: 0 auto; }
.lessons-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}
.lessons h3, .lessons > p, .narrow h3, .narrow p { max-width: 760px; }
.lessons h3, .lessons > p { margin-left: auto; margin-right: auto; }

.review-grid, .product-grid {
  display: grid;
  gap: 1rem;
  max-width: var(--max);
  margin: 2rem auto 0;
}
.review-grid { grid-template-columns: repeat(3, 1fr); }
.product-grid { grid-template-columns: 1fr 1fr; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  padding: 1.3rem;
}
.stars { color: var(--orange); letter-spacing: 0.15em; margin: 0; }
.byline { color: var(--muted); font-size: 0.9rem; }
.lede { max-width: 720px; margin: 0 auto; text-align: center; }
.price { color: var(--orange); font-size: 2rem; font-weight: 700; margin: 0.4rem 0; }
.price-small { color: var(--orange); font-weight: 700; text-align: center; }
.file-name { text-align: center; color: var(--muted); }
.product-card ul { padding-left: 1.1rem; }
.product-card li { margin: 0.45rem 0; }
.product-card li::marker { color: var(--orange); }

.discount-row { display: flex; gap: 0.5rem; }
input {
  flex: 1;
  background: #101014;
  color: #fff;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  padding: 0.7rem 0.8rem;
  font: inherit;
}
.button, button.button {
  display: inline-block;
  background: var(--orange);
  color: var(--orange-ink);
  border: 0;
  border-radius: 0.4rem;
  padding: 0.75rem 1rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.button:disabled { opacity: 0.45; cursor: not-allowed; }
.buy, .facebook { width: 100%; text-align: center; margin-top: 0.8rem; }
.facebook { background: var(--blue); color: #fff; }
.form-message { min-height: 1.2rem; color: var(--muted); }
.fine, .community-label { color: var(--muted); font-size: 0.85rem; text-align: center; }
hr { border: 0; border-top: 1px solid var(--line); margin: 1.2rem 0; }
.download-wrap a { font-weight: 700; }

.amazon { text-align: center; }
.qr { width: 220px; background: #fff; padding: 0.4rem; }
.amazon-link { display: inline-block; margin-top: 1rem; }

.site-footer {
  padding: 2rem 1rem 2.5rem;
  text-align: center;
  background: #070708;
  color: var(--muted);
}
.site-footer nav { display: flex; justify-content: center; flex-wrap: wrap; gap: 1rem; }
.site-footer a { color: #fff; text-decoration: none; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    padding: 0.8rem 1.2rem 1rem;
    background: #fff;
    border-bottom: 1px solid #e4e4e7;
  }
  .site-nav.open { display: flex; }
  .hero, .author, .lessons-grid, .review-grid, .product-grid { grid-template-columns: 1fr; }
  .hero { min-height: 0; }
  .author-photo { max-width: 280px; }
}

@media (max-width: 640px) {
  .hero, .section { padding: 3rem 1.1rem; }
  .discount-row { flex-direction: column; }
}