:root {
  --bg: #0f1115;
  --bg2: #161a21;
  --card: #1b2029;
  --line: #2a3140;
  --text: #e8ebf0;
  --muted: #9aa3b2;
  --accent: #4f8cff;
  --accent2: #36c38a;
  --warn: #ffb547;
  --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 "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* header */
.top {
  position: sticky; top: 0; z-index: 10;
  background: rgba(15, 17, 21, .85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { font-weight: 700; color: var(--text); letter-spacing: .2px; }
.logo span { color: var(--accent); }
.nav { display: flex; gap: 22px; font-size: 15px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); text-decoration: none; }
@media (max-width: 720px) { .nav { display: none; } }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; border-radius: 12px;
  background: var(--accent); color: #fff; font-weight: 600;
  border: 0; cursor: pointer; font-size: 15px;
}
.btn:hover { filter: brightness(1.1); text-decoration: none; }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--text); }
.btn.small { padding: 8px 14px; font-size: 14px; }

/* hero */
.hero { padding: 88px 0 64px; }
.hero h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.12; margin: 0 0 18px; letter-spacing: -.5px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lead { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0 0 30px; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; }
.badges { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 36px; }
.badge { font-size: 13px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; }

/* sections */
section { padding: 64px 0; }
section.alt { background: var(--bg2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { font-size: clamp(26px, 3.5vw, 34px); margin: 0 0 10px; letter-spacing: -.3px; }
.sub { color: var(--muted); margin: 0 0 36px; max-width: 640px; }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; display: flex; flex-direction: column;
}
.card h3 { margin: 0 0 8px; font-size: 19px; }
.card p { margin: 0 0 14px; color: var(--muted); font-size: 15px; }
.card .price { margin-top: auto; font-weight: 700; font-size: 18px; }
.card .price small { color: var(--muted); font-weight: 400; font-size: 13px; }
.card .ico { font-size: 28px; margin-bottom: 12px; }

/* demos */
.demo { display: grid; grid-template-columns: 1.1fr 1fr; gap: 28px; align-items: center; margin-bottom: 48px; }
.demo:last-child { margin-bottom: 0; }
.demo.rev .demo-text { order: 2; }
@media (max-width: 820px) { .demo { grid-template-columns: 1fr; } .demo.rev .demo-text { order: 0; } }
.demo h3 { font-size: 24px; margin: 0 0 10px; }
.demo ul { padding-left: 18px; color: var(--muted); margin: 0 0 20px; }
.demo li { margin: 4px 0; }
.frame {
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: #000; aspect-ratio: 4 / 3; position: relative;
}
.frame iframe { width: 100%; height: 100%; border: 0; }
.phone {
  width: 300px; height: 600px; margin: 0 auto; border-radius: 40px;
  border: 10px solid #22262e; background: #000; overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.phone iframe { width: 100%; height: 100%; border: 0; }

/* audit */
.audit { display: grid; gap: 12px; }
.audit-row {
  display: grid; grid-template-columns: 28px 1fr auto; gap: 14px; align-items: start;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px;
}
.audit-row .st { font-size: 18px; line-height: 1.4; }
.audit-row b { display: block; }
.audit-row span { color: var(--muted); font-size: 14px; }
.audit-row .fix { color: var(--accent2); font-size: 14px; white-space: nowrap; }
@media (max-width: 600px) { .audit-row { grid-template-columns: 24px 1fr; } .audit-row .fix { grid-column: 2; } }

/* steps */
.steps { counter-reset: s; display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.step { position: relative; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); }
.step::before {
  counter-increment: s; content: counter(s);
  display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 700; margin-bottom: 12px;
}
.step h4 { margin: 0 0 6px; font-size: 17px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

/* faq */
details { border-bottom: 1px solid var(--line); padding: 16px 0; }
summary { cursor: pointer; font-weight: 600; list-style: none; }
summary::after { content: "+"; float: right; color: var(--muted); }
details[open] summary::after { content: "–"; }
details p { color: var(--muted); margin: 10px 0 0; }

/* contact */
.contact { text-align: center; }
.contact .cta { justify-content: center; display: flex; gap: 12px; flex-wrap: wrap; }
footer { padding: 30px 0; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); text-align: center; }