/* Blog pages for chat.letbe.ai — static HTML (real pages for crawlers), same
   B1 Soft Sky brand as the app: light, calm blue accent, dark header. */
:root {
  --acc: #3f6fb5;
  --acc-soft: #eaf1fa;
  --header-bg: #1c2839;
  --bg: #f7fafd;
  --surface: #ffffff;
  --text: #24344d;
  --dim: #5a6b84;
  --faint: #8fa0b8;
  --border: #dfe7f1;
  --radius: 14px;
}
* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16.5px;
}
a { color: var(--acc); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 780px; margin: 0 auto; padding: 0 22px; }

.site-header { background: var(--header-bg); }
.site-header .container { max-width: 1080px; display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 800; font-size: 18px; letter-spacing: -0.02em; }
.brand:hover { text-decoration: none; }
.brand img { border-radius: 8px; }
.brand span { color: #93a5c0; font-weight: 500; }
.header-cta { background: var(--acc); color: #fff; font-weight: 700; font-size: 14px; padding: 8px 16px; border-radius: 10px; }
.header-cta:hover { text-decoration: none; filter: brightness(1.08); }

.crumbs { font-size: 13px; color: var(--faint); margin: 26px 0 6px; }
.post-head { margin: 8px 0 30px; }
h1 { font-size: clamp(26px, 4.6vw, 38px); line-height: 1.2; letter-spacing: -0.03em; margin: 8px 0 12px; }
.post-meta { font-size: 14px; color: var(--faint); }
article h2 { font-size: 24px; letter-spacing: -0.02em; margin: 38px 0 12px; }
article h3 { font-size: 18.5px; margin: 26px 0 8px; }
article p, article li { color: var(--text); }
article ul, article ol { padding-left: 24px; margin: 12px 0; }
article li { margin: 6px 0; }
article p { margin: 12px 0; }
.lede { font-size: 19px; color: var(--dim); }
.stat-callout {
  border: 1px solid var(--border); border-left: 4px solid var(--acc);
  background: var(--surface); border-radius: 10px; padding: 14px 18px; margin: 18px 0;
  color: var(--dim); font-size: 15.5px;
}
.stat-callout strong { color: var(--text); }
.cta-box {
  background: var(--acc-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; margin: 42px 0; text-align: center;
}
.cta-box h2 { margin-top: 0; }
.cta-box p { color: var(--dim); max-width: 520px; margin: 10px auto 18px; }
.cta-box .btn { display: inline-block; background: var(--acc); color: #fff; font-weight: 700; padding: 12px 26px; border-radius: 12px; }
.cta-box .btn:hover { text-decoration: none; filter: brightness(1.08); }
.faq h3 { margin-top: 22px; }
.post-footer { border-top: 1px solid var(--border); margin-top: 44px; padding: 22px 0 0; font-size: 14.5px; color: var(--dim); }

.post-list { display: grid; gap: 18px; margin: 30px 0 60px; }
.post-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; display: block; }
.post-card:hover { text-decoration: none; border-color: var(--acc); }
.post-card h2 { font-size: 20px; margin: 0 0 8px; color: var(--text); }
.post-card p { color: var(--dim); font-size: 15px; margin: 0 0 10px; }
.post-card .read { font-weight: 700; font-size: 14px; }

.site-footer { border-top: 1px solid var(--border); margin-top: 70px; padding: 26px 0 40px; font-size: 14px; color: var(--faint); }
.site-footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; max-width: 1080px; }
.site-footer a { color: var(--dim); margin-left: 16px; }
main { padding-bottom: 30px; }