:root {
  --bg: #090d0b;
  --surface: #111713;
  --card: #171f1b;
  --border: #2d3932;
  --green: #3ddc97;
  --green-dim: #153b2c;
  --red: #ff8e99;
  --amber: #ebc47e;
  --text: #f1f5f2;
  --text2: #b4c0b8;
  --muted: #94a399;
  --radius: 16px;
  --max: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* header */
.top { position: sticky; top: 0; z-index: 10; background: rgba(9, 13, 11, .88); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.top .wrap { display: flex; align-items: center; gap: 12px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 800; letter-spacing: .5px; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.top nav { margin-left: auto; display: flex; gap: 20px; font-size: 15px; }
.top nav a { color: var(--text2); }
@media (max-width: 720px) { .top nav { display: none; } }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 24px; border-radius: 12px; font-weight: 700; font-size: 16px; border: 1px solid transparent; }
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.btn-primary { background: var(--green); color: #07130d; }
.btn-ghost { border-color: var(--border); color: var(--text); }
.small { color: var(--muted); font-size: 14px; }

/* hero */
.hero { padding: 64px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; }
.hero h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.1; margin: 0 0 18px; letter-spacing: -.5px; }
.hero h1 span { color: var(--green); }
.hero p.lead { font-size: 19px; color: var(--text2); margin: 0 0 28px; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.hero .meta { margin-top: 14px; }
.phone { border-radius: 28px; border: 1px solid var(--border); overflow: hidden; box-shadow: 0 30px 80px rgba(61, 220, 151, .08); background: var(--surface); max-width: 360px; margin: 0 auto; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; } .hero { padding-top: 40px; } .phone { max-width: 240px; } }

/* sections */
section { padding: 56px 0; }
section h2 { font-size: clamp(26px, 3.5vw, 36px); margin: 0 0 12px; letter-spacing: -.3px; }
section .intro { color: var(--text2); max-width: 720px; margin: 0 0 32px; font-size: 17px; }
.principle { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.principle blockquote { margin: 0; font-size: clamp(20px, 2.6vw, 26px); line-height: 1.45; max-width: 820px; }
.principle blockquote b { color: var(--green); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--text2); font-size: 15px; }
.card .num { color: var(--green); font-weight: 800; }
.tag { display: inline-block; font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 99px; background: var(--green-dim); color: var(--green); margin-bottom: 10px; }
.tag.pro { background: rgba(235, 196, 126, .12); color: var(--amber); }

/* research highlight */
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 8px; }
.fact { border-left: 3px solid var(--green); padding: 4px 0 4px 16px; }
.fact b { display: block; font-size: 28px; color: var(--text); }
.fact span { color: var(--text2); font-size: 14px; }
.note { color: var(--muted); font-size: 14px; margin-top: 18px; max-width: 820px; }

/* gallery */
.gallery { display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 12px; }
.gallery figure { margin: 0; flex: 0 0 240px; scroll-snap-align: start; }
.gallery img { border-radius: 20px; border: 1px solid var(--border); }
.gallery figcaption { color: var(--text2); font-size: 14px; margin-top: 8px; }

/* steps & faq */
ol.steps { padding-left: 22px; color: var(--text2); max-width: 760px; }
ol.steps li { margin-bottom: 10px; }
details { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; margin-bottom: 10px; max-width: 820px; }
details summary { cursor: pointer; font-weight: 700; }
details p { color: var(--text2); margin: 10px 0 0; }

/* download band */
.download { text-align: center; background: linear-gradient(180deg, var(--surface), var(--bg)); border-top: 1px solid var(--border); }
.download .btn { margin-top: 8px; }

footer { border-top: 1px solid var(--border); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 18px; justify-content: space-between; }
footer nav { display: flex; gap: 18px; flex-wrap: wrap; }

/* legal pages */
.doc { max-width: 820px; padding: 40px 20px 60px; margin: 0 auto; }
.doc h1 { font-size: 32px; }
.doc h2 { font-size: 21px; margin-top: 32px; }
.doc p, .doc li { color: var(--text2); }