:root {
  --bg: #0e1116;
  --fg: #e6edf3;
  --muted: #8b949e;
  --panel: #161b22;
  --border: rgba(240, 246, 252, 0.1);
  --accent: #2f81f7;
  --accent-2: #58a6ff;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 760px; }

header.site { border-bottom: 1px solid var(--border); }
header.site .container {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; padding-bottom: 16px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 18px; color: var(--fg);
}
.logo svg { width: 28px; height: 28px; }
nav.site a {
  margin-left: 18px; color: var(--muted); font-size: 14px;
}
nav.site a:hover { color: var(--fg); }

.breadcrumbs {
  font-size: 13px; color: var(--muted);
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.breadcrumbs a { color: var(--muted); }
.breadcrumbs a:hover { color: var(--fg); }
.breadcrumbs span[aria-current] { color: var(--fg); }
.breadcrumbs .sep { margin: 0 8px; opacity: 0.5; }

.hero { padding: 80px 0 56px; text-align: center; }
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.15; margin: 0 0 20px; letter-spacing: -0.02em;
}
.hero p.lead {
  font-size: clamp(16px, 2vw, 19px);
  max-width: 720px; margin: 0 auto 32px; color: var(--muted);
}
.cta-row { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 8px;
  font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; text-decoration: none;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { filter: brightness(1.1); text-decoration: none; }
.btn-secondary { background: transparent; color: var(--fg); border-color: var(--border); }
.btn-secondary:hover { background: var(--panel); text-decoration: none; }
.badges {
  display: flex; justify-content: center; gap: 18px;
  margin-top: 28px; font-size: 13px; color: var(--muted); flex-wrap: wrap;
}
.badges span::before { content: '✓ '; color: var(--accent); font-weight: 700; }

section { padding: 56px 0; border-top: 1px solid var(--border); }
section h2 {
  font-size: clamp(24px, 3vw, 32px);
  margin: 0 0 12px; letter-spacing: -0.01em;
}
section .lead { color: var(--muted); margin-bottom: 36px; max-width: 680px; }

.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 22px; }
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.icon { width: 28px; height: 28px; margin-bottom: 12px; color: var(--accent); }

ol.steps {
  counter-reset: step; list-style: none; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px;
}
ol.steps li {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 22px; position: relative;
}
ol.steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: 16px; right: 16px;
  font-weight: 700; color: var(--accent); font-size: 22px; opacity: 0.4;
}
ol.steps li h3 { margin: 0 0 6px; font-size: 16px; }
ol.steps li p { margin: 0; color: var(--muted); font-size: 14px; }

details.faq {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 20px; margin-bottom: 10px;
}
details.faq summary {
  cursor: pointer; font-weight: 600; font-size: 15px; list-style: none;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: '+'; float: right; color: var(--muted); font-weight: 400; font-size: 20px; }
details.faq[open] summary::after { content: '−'; }
details.faq p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }

article.post { padding: 56px 0; }
article.post .meta {
  display: flex; gap: 12px; align-items: center;
  font-size: 13px; color: var(--muted); margin-bottom: 16px;
}
article.post .meta time { color: var(--muted); }
article.post h1 {
  font-size: clamp(28px, 4vw, 40px);
  margin: 0 0 14px; letter-spacing: -0.02em; line-height: 1.2;
}
article.post p.lead-in {
  font-size: 18px; color: var(--fg); margin: 0 0 32px;
}
article.post h2 {
  font-size: 24px; margin: 36px 0 12px; letter-spacing: -0.01em;
  border-top: 1px solid var(--border); padding-top: 28px;
}
article.post h3 { font-size: 18px; margin: 24px 0 8px; }
article.post p, article.post li { color: #c9d1d9; font-size: 16px; line-height: 1.7; }
article.post ul, article.post ol { padding-left: 22px; margin: 12px 0; }
article.post li { margin: 6px 0; }
article.post code {
  background: var(--panel); border: 1px solid var(--border);
  padding: 1px 6px; border-radius: 4px; font-size: 13px;
  font-family: 'SF Mono', Menlo, Monaco, 'Courier New', monospace;
}
article.post blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 16px; margin: 18px 0; color: var(--muted); font-style: italic;
}
article.post .cta-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 22px; margin: 36px 0;
  display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap;
}
article.post .cta-card p { margin: 0; }
article.post .related { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 20px 22px; margin-top: 36px; }
article.post .related h3 { margin: 0 0 10px; font-size: 15px; }
article.post .related ul { list-style: none; padding: 0; margin: 0; }
article.post .related li { margin: 6px 0; font-size: 14px; }

ul.post-list { list-style: none; padding: 0; }
ul.post-list li {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 20px 22px; margin-bottom: 12px;
}
ul.post-list h2 { margin: 0 0 6px; font-size: 18px; border: none; padding: 0; }
ul.post-list h2 a { color: var(--fg); }
ul.post-list .meta { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
ul.post-list p { margin: 0; color: var(--muted); font-size: 14px; }

footer.site {
  border-top: 1px solid var(--border); padding: 28px 0; margin-top: 32px;
  color: var(--muted); font-size: 13px;
}
footer.site .container {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
footer.site nav a { margin-left: 14px; color: var(--muted); }

@media (max-width: 600px) {
  .hero { padding: 56px 0 32px; }
  section, article.post { padding: 40px 0; }
}