:root {
  --guide-bg: #0b0f19;
  --guide-panel: #111827;
  --guide-panel-soft: #172033;
  --guide-border: rgba(255, 255, 255, .12);
  --guide-text: #f9fafb;
  --guide-muted: #cbd5e1;
  --guide-accent: #c4b5fd;
  --guide-accent-strong: #7c3aed;
  --guide-warn: #fde68a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 15% 0%, #18213a 0, var(--guide-bg) 38rem), var(--guide-bg);
  color: var(--guide-text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  line-height: 1.7;
}

a { color: var(--guide-accent); }
a:hover, a:focus { color: #fbbf24; }

.guide-shell {
  width: min(100% - 32px, 980px);
  margin: 0 auto;
}

.guide-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--guide-border);
}

.brand {
  color: var(--guide-text);
  font-size: 18px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: .01em;
}

.header-cta {
  border: 1px solid rgba(196, 181, 253, .65);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  text-decoration: none;
}

.breadcrumbs { padding: 22px 0 8px; }
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin: 0;
  padding: 0;
  color: #94a3b8;
  font-size: 13px;
  list-style: none;
}
.breadcrumbs li:not(:last-child)::after { content: '/'; margin-left: 12px; color: #64748b; }

.guide-hero { max-width: 760px; padding: 18px 0 28px; }
.guide-hero h1 { margin: 0 0 12px; font-size: clamp(28px, 5vw, 44px); line-height: 1.15; letter-spacing: -.02em; }
.guide-hero p { margin: 0; color: var(--guide-muted); font-size: 17px; }

.guide-layout { display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: 24px; align-items: start; }
.guide-content, .guide-aside { background: rgba(17, 24, 39, .88); border: 1px solid var(--guide-border); border-radius: 16px; }
.guide-content { padding: clamp(20px, 4vw, 34px); }
.guide-content h2 { margin: 0 0 10px; color: var(--guide-text); font-size: 23px; line-height: 1.3; }
.guide-content h2:not(:first-child) { margin-top: 34px; }
.guide-content p { margin: 0 0 14px; color: var(--guide-muted); }
.guide-content ul, .guide-content ol { margin: 0 0 16px; padding-left: 22px; color: var(--guide-muted); }
.guide-content li { margin: 7px 0; }
.guide-content strong { color: var(--guide-text); }

.callout { margin: 0 0 28px; padding: 16px 18px; border-left: 4px solid var(--guide-accent-strong); background: var(--guide-panel-soft); border-radius: 10px; }
.callout p { margin: 0; }
.callout a { font-weight: 700; }

.step-list { counter-reset: guide-step; list-style: none; padding-left: 0 !important; }
.step-list li { counter-increment: guide-step; display: grid; grid-template-columns: 34px 1fr; gap: 10px; align-items: start; }
.step-list li::before { content: counter(guide-step); display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--guide-accent-strong); color: #fff; font-weight: 800; line-height: 1; }

.checklist { padding: 15px 18px; background: rgba(30, 41, 59, .7); border-radius: 10px; }
.warning { color: var(--guide-warn) !important; }
.related-links { display: grid; gap: 9px; margin-top: 20px; }
.related-links a { padding: 10px 12px; background: rgba(30, 41, 59, .65); border-radius: 9px; text-decoration: none; }

.guide-aside { position: sticky; top: 18px; padding: 20px; }
.guide-aside h2 { margin: 0 0 10px; font-size: 16px; }
.guide-aside ul { margin: 0; padding-left: 18px; color: var(--guide-muted); font-size: 14px; }
.guide-aside li { margin: 7px 0; }

.guide-footer { padding: 28px 0 36px; color: #94a3b8; font-size: 13px; }
.guide-footer p { margin: 0; }

@media (max-width: 720px) {
  .guide-layout { grid-template-columns: 1fr; }
  .guide-aside { position: static; }
  .guide-hero p { font-size: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}