:root {
  --bg: #fafbfc;
  --surface: #ffffff;
  --text: #1a1d21;
  --muted: #5b6470;
  --border: #e3e7ec;
  --accent: #0a66ff;
  --accent-soft: #eaf1ff;
  --code-bg: #f1f3f5;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.nav {
  position: sticky; top: 0; z-index: 10;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 960px; margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 17px; color: var(--text); }
.brand span { color: var(--accent); }
.nav-links { display: flex; gap: 16px; flex-wrap: wrap; font-size: 14.5px; }
.nav-links a { color: var(--muted); }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.wrap { max-width: 960px; margin: 0 auto; padding: 36px 20px 64px; }
.hero {
  background: linear-gradient(135deg, #0a66ff 0%, #6a3df5 100%);
  color: #fff; border-radius: 14px; padding: 44px 36px; margin-bottom: 32px;
}
.hero h1 { margin: 0 0 10px; font-size: 32px; line-height: 1.25; }
.hero p { margin: 0; opacity: .92; font-size: 16.5px; max-width: 640px; }
.badge {
  display: inline-block; font-size: 12.5px; font-weight: 600;
  background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.35);
  padding: 3px 10px; border-radius: 999px; margin-bottom: 14px;
}
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; margin: 28px 0; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; transition: box-shadow .15s ease;
}
.card:hover { box-shadow: 0 6px 20px rgba(10,102,255,.10); }
.card h3 { margin: 0 0 6px; font-size: 16.5px; }
.card p { margin: 0 0 10px; font-size: 14px; color: var(--muted); }
.card a.cta { font-size: 14px; font-weight: 600; }
h2 { margin-top: 40px; font-size: 23px; }
h3 { margin-top: 28px; font-size: 18px; }
.fact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin: 18px 0; }
.fact { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.fact .k { font-size: 12.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.fact .v { font-size: 16px; font-weight: 650; margin-top: 2px; }
table.spec { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: var(--radius); overflow: hidden; font-size: 14.5px; }
table.spec th, table.spec td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); }
table.spec th { background: #f4f6f9; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
table.spec tr:last-child td { border-bottom: none; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
code { background: var(--code-bg); padding: 2px 6px; border-radius: 5px; font-size: .92em; }
pre { background: #101418; color: #e8edf2; padding: 16px 18px; border-radius: var(--radius); overflow-x: auto; font-size: 13.5px; line-height: 1.6; }
pre code { background: transparent; padding: 0; border-radius: 0; font-size: inherit; }
pre .c { color: #8b949e; }
ol.steps { counter-reset: step; list-style: none; padding: 0; }
ol.steps > li {
  counter-increment: step; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px 18px 64px; margin-bottom: 14px; position: relative;
}
ol.steps > li::before {
  content: counter(step); position: absolute; left: 20px; top: 18px;
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent-soft);
  color: var(--accent); font-weight: 700; display: flex; align-items: center; justify-content: center;
}
ol.steps > li h4 { margin: 0 0 6px; font-size: 16px; }
ol.steps > li p { margin: 6px 0; font-size: 14.5px; color: var(--muted); }
ol.steps > li p strong { color: var(--text); }
ul.check { list-style: none; padding: 0; }
ul.check li {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 16px 12px 44px; margin-bottom: 10px; position: relative; font-size: 14.5px;
}
ul.check li::before { content: "☐"; position: absolute; left: 16px; top: 12px; color: var(--accent); font-size: 16px; }
ul.check li.done::before { content: "☑"; }
ul.check li.done { opacity: .62; text-decoration: line-through; }
ul.check li small { display: block; color: var(--muted); font-size: 13px; margin-top: 2px; }
.faq { margin: 18px 0; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 18px; margin-bottom: 10px; }
.faq summary { font-weight: 650; cursor: pointer; font-size: 15.5px; }
.faq details p { font-size: 14.5px; color: var(--muted); margin: 8px 0 2px; }
.faq details p strong { color: var(--text); }
.note {
  background: #fff8e6; border: 1px solid #f0dfae; border-radius: var(--radius);
  padding: 14px 18px; font-size: 14px; margin: 20px 0;
}
.mockup-tools { display: flex; gap: 14px; flex-wrap: wrap; align-items: end; margin: 20px 0; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }
.btn {
  display: inline-block; background: var(--accent); color: #fff; border: none; cursor: pointer;
  padding: 10px 20px; border-radius: 8px; font-size: 14.5px; font-weight: 600;
}
.btn:hover { filter: brightness(.94); text-decoration: none; }
.btn.secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
canvas#stage { max-width: 100%; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; }
.drop {
  border: 2px dashed var(--border); border-radius: var(--radius); padding: 26px;
  text-align: center; color: var(--muted); font-size: 14.5px; cursor: pointer; background: var(--surface);
}
.drop:hover { border-color: var(--accent); }
footer { border-top: 1px solid var(--border); margin-top: 56px; padding: 22px 20px; font-size: 13px; color: var(--muted); text-align: center; }
footer p { max-width: 960px; margin: 4px auto; }
@media (max-width: 640px) { .hero { padding: 32px 22px; } .hero h1 { font-size: 25px; } }