:root {
  --bg: #f6f5f2; --card: #fff; --fg: #1d1f24; --muted: #5d6270; --line: #e3e1db;
  --accent: #3f51b5; --accent-fg: #fff; --hero1: #1c2156; --hero2: #2c3a8e;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --bg: #15171c; --card: #1e2128; --fg: #e9eaee; --muted: #a3a8b5; --line: #2e323b; --accent: #8c9eff; --accent-fg: #10131c; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
img { max-width: 100%; display: block; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
header.top { display: flex; align-items: center; gap: 12px; padding: 18px 0; }
header.top .brand { white-space: nowrap; display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; color: inherit; text-decoration: none; }
header.top nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
header.top nav a { color: var(--muted); text-decoration: none; }
header.top nav a:hover { color: var(--fg); }
.hero { background: linear-gradient(160deg, var(--hero1), var(--hero2)); color: #fff; padding: 56px 0 0; overflow: hidden; }
.hero h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.12; margin: 0 0 16px; max-width: 760px; }
.hero p.lead { font-size: clamp(17px, 2.2vw, 21px); color: #d5dbff; max-width: 680px; margin: 0 0 28px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 14px; }
.btn { display: inline-block; padding: 13px 22px; border-radius: 10px; font-weight: 600; text-decoration: none; font-size: 16px; }
.btn.primary { background: #fff; color: #1c2156; }
.btn.ghost { border: 1.5px solid rgba(255,255,255,.5); color: #fff; }
.btn:hover { filter: brightness(1.06); }
.hero .note { color: #b9c2f5; font-size: 14px; margin: 0 0 40px; }
.hero .shot { border-radius: 12px 12px 0 0; box-shadow: 0 -10px 40px rgba(0,0,0,.35); }
section { padding: 56px 0; }
h2 { font-size: clamp(24px, 3.2vw, 32px); margin: 0 0 22px; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; counter-reset: s; }
.steps div { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.steps div::before { counter-increment: s; content: counter(s); display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: var(--accent-fg); font-weight: 700; margin-bottom: 10px; }
.steps b { display: block; margin-bottom: 4px; }
.steps p { margin: 0; color: var(--muted); font-size: 15px; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 14px 28px; }
.features div b { display: block; }
.features div span { color: var(--muted); font-size: 15px; }
.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.gallery figure { margin: 0; }
.gallery img { border-radius: 10px; border: 1px solid var(--line); }
.gallery figcaption { color: var(--muted); font-size: 14px; margin-top: 6px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--muted); margin: 10px 0 0; }
footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer .links { display: flex; flex-wrap: wrap; gap: 18px; margin-bottom: 8px; }
.doc { max-width: 760px; padding-top: 10px; padding-bottom: 60px; }
.doc h1 { font-size: 34px; margin: 10px 0 4px; }
.doc h2 { font-size: 21px; margin: 30px 0 8px; }
.doc .updated { color: var(--muted); margin: 0 0 24px; }
@media (max-width: 560px) {
  header.top nav { gap: 12px; font-size: 14px; }
  header.top nav a[href="#how"] { display: none; }
  .hero { padding-top: 36px; }
  section { padding: 40px 0; }
}