:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --surface: #11161d;
  --surface-2: #1a212b;
  --text: #f2f5f8;
  --muted: #8b98a8;
  --blue: #0a84ff;
  --cyan: #22d3ee;
  --green: #34c759;
  --border: rgba(255, 255, 255, 0.1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(120deg, rgba(10, 132, 255, 0.22), transparent 38%),
    linear-gradient(300deg, rgba(34, 211, 238, 0.14), transparent 42%),
    linear-gradient(180deg, #0b0f14, #101b2a);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 70% 35%, #000 0%, transparent 72%);
}
a { color: inherit; }

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 15, 20, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-group { display: flex; align-items: center; gap: 12px; }
.brand { font-weight: 700; text-decoration: none; }
.crumb { font-size: 13px; color: var(--muted); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.lang-toggle {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text);
  font: inherit;
  font-size: 12px;
  border-radius: 8px;
  padding: 7px 10px;
}
.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  border-radius: 10px;
  padding: 12px 20px;
}
.button-small { padding: 8px 14px; font-size: 13px; }
.button-large { padding: 15px 28px; font-size: 16px; }
.muted { color: var(--muted); }

main { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.hero {
  padding: 64px 0 56px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}
.hero-logo { width: 84px; height: 84px; border-radius: 20px; box-shadow: 0 18px 50px rgba(34, 211, 238, 0.2); }
.hero h1 { font-size: 46px; line-height: 1.1; margin: 16px 0 10px; }
.hero .lead { font-size: 17px; color: var(--muted); margin-bottom: 24px; max-width: 520px; }
.hero-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }

.app-window {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,0.45);
}
.window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
}
.traffic { width: 12px; height: 12px; border-radius: 50%; }
.traffic-close { background: #ff5f57; }
.traffic-min { background: #febc2e; }
.traffic-full { background: #28c840; }
.window-title { margin-left: 8px; font-size: 12px; color: var(--muted); }
.app-window img { width: 100%; display: block; }

section { padding: 48px 0; border-top: 1px solid var(--border); }
h2 { font-size: 30px; text-align: center; margin-bottom: 8px; }
.section-sub { text-align: center; color: var(--muted); margin-bottom: 26px; }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.step-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
}
.step-num {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--cyan);
  color: #05121a;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}
.step-card h3 { margin-bottom: 6px; }
.step-card p { color: var(--muted); }

.demo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.demo-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
.demo-card .label {
  display: inline-block;
  margin: 14px 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 20px;
}
.demo-card img { width: 100%; display: block; margin-top: 10px; }

.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 22px; }
.chips span {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 7px 14px;
  font-size: 13px;
}

.download-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  text-align: center;
}
.download-card .button { margin: 16px 0 10px; }
.sha { display: block; color: var(--muted); font-size: 12px; }

.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.faq-item h3 { font-size: 16px; margin-bottom: 6px; }
.faq-item p { color: var(--muted); }

footer {
  border-top: 1px solid var(--border);
  padding: 26px 20px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; }
  .steps-grid, .faq-grid, .demo-grid { grid-template-columns: 1fr; }
}