:root {
  --bg: #0a0a0a;
  --panel: #141414;
  --border: #2a2a2a;
  --text: #f5f5f5;
  --muted: #a3a3a3;
  --accent: #22d3ee;
  --accent-strong: #0891b2;
  --radius: 12px;
  --max: 1080px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(100% - 40px, var(--max)); margin-inline: auto; }

header {
  position: sticky; top: 0; z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(10,10,10,.9);
  backdrop-filter: blur(10px);
}
header .container {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand { font-weight: 700; font-size: 18px; color: var(--text); display: inline-flex; align-items: center; gap: 8px; }
.brand img { border-radius: 6px; }
nav { display: flex; gap: 20px; align-items: center; }
nav a { color: var(--muted); font-size: 14px; }

.hero {
  padding: 72px 0 48px;
  background: radial-gradient(ellipse at top, rgba(34,211,238,.12), transparent 60%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  nav { display: none; }
}
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--muted); font-size: 13px;
}
h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.1; margin: 16px 0; }
.lead { color: var(--muted); font-size: 1.1rem; max-width: 52ch; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 18px; border-radius: 10px; font-weight: 600; border: 1px solid transparent;
}
.btn-primary { background: var(--accent-strong); color: white; }
.btn-secondary { border-color: var(--border); color: var(--text); background: var(--panel); }
.btn-disabled { opacity: .5; pointer-events: none; }

.preview {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--panel); overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.45);
}
.preview-bar {
  display: flex; gap: 6px; padding: 10px 12px; border-bottom: 1px solid var(--border);
}
.dot { width: 10px; height: 10px; border-radius: 50%; background: #444; }
.preview-body { padding: 16px; font-size: 13px; color: var(--muted); }
.preview-body strong { color: var(--text); }

section { padding: 56px 0; }
section h2 { font-size: 1.75rem; margin: 0 0 12px; }
.section-lead { color: var(--muted); margin-bottom: 28px; }

.grid-3 {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
@media (max-width: 860px) { .grid-3 { grid-template-columns: 1fr; } }
.card {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--panel); padding: 20px;
}
.card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

.steps { display: grid; gap: 12px; }
.step {
  display: flex; gap: 14px; align-items: flex-start;
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; background: var(--panel);
}
.step-num {
  width: 28px; height: 28px; border-radius: 8px;
  background: rgba(34,211,238,.15); color: var(--accent);
  display: grid; place-items: center; font-weight: 700; font-size: 13px; flex-shrink: 0;
}

.download-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
}
@media (max-width: 860px) { .download-grid { grid-template-columns: 1fr; } }
.download-note { color: var(--muted); font-size: 14px; margin-top: 12px; }

.faq details {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--panel); padding: 14px 16px; margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--muted); margin: 10px 0 0; font-size: 14px; }

footer {
  border-top: 1px solid var(--border);
  padding: 28px 0; color: var(--muted); font-size: 14px;
}

.site-footer .footer-inner {
  display: flex; flex-direction: column; gap: 12px;
}
.footer-tagline { margin: 0; color: var(--text); font-weight: 600; }
.footer-copy { margin: 0; font-size: 13px; }
.footer-links {
  display: flex; flex-wrap: wrap; gap: 8px 16px;
}
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--accent); text-decoration: underline; }

.prose { max-width: 720px; }
.prose h2 { margin: 28px 0 12px; font-size: 1.25rem; }
.prose p, .prose li { color: var(--muted); line-height: 1.65; font-size: 15px; }
.prose ul { padding-left: 1.25rem; margin: 12px 0; }
.prose code { font-size: 13px; color: var(--accent); }