/* Borrowsignal — shared styles for sub-pages (blog, glossary, tools).
   Main landing (index.html) keeps its own inline CSS for performance. */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,sans-serif;color:#0f172a;background:#fff;line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}

:root{--ink:#0f172a;--ink-soft:#475569;--ink-soft-2:#64748b;--line:#e2e8f0;--bg-soft:#f8fafc;--accent:#4f46e5;--accent-dark:#4338ca;--green:#059669;--radius:12px;--container:1120px;--container-narrow:760px}

.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.container-narrow{max-width:var(--container-narrow);margin:0 auto;padding:0 24px}

/* Skip link */
.skip-link{position:absolute;top:-40px;left:0;background:var(--ink);color:#fff;padding:8px 16px;border-radius:0 0 8px 0;z-index:100;font-size:14px;font-weight:500;transition:top .15s}
.skip-link:focus{top:0;outline:2px solid var(--accent);outline-offset:2px}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

/* Header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;flex-shrink:0}
.logo-dot{width:24px;height:24px;border-radius:6px;background:linear-gradient(135deg,var(--accent),#7c3aed)}
.nav ul{display:flex;gap:28px;list-style:none}
.nav ul a{font-size:14px;color:var(--ink-soft);transition:color .15s}
.nav ul a:hover{color:var(--ink)}
.btn-primary{background:var(--ink);color:#fff;padding:10px 18px;border-radius:8px;font-weight:500;font-size:14px;transition:background .15s;display:inline-block}
.btn-primary:hover{background:#1e293b}
.btn-cta{background:var(--accent);color:#fff;padding:14px 24px;border-radius:10px;font-weight:600;font-size:15px;transition:background .15s;display:inline-flex;align-items:center;gap:8px}
.btn-cta:hover{background:var(--accent-dark)}
.btn-ghost{padding:10px 18px;border-radius:8px;font-weight:500;font-size:14px;border:1px solid var(--line);transition:border-color .15s;display:inline-block;color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink)}
@media (max-width:900px){.nav ul{display:none}}

/* Page hero */
.page-hero{padding:64px 0 32px;background:linear-gradient(180deg,#fff 0%,var(--bg-soft) 100%);border-bottom:1px solid var(--line)}
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:14px;color:var(--ink-soft);margin-bottom:16px;flex-wrap:wrap}
.breadcrumb a{color:var(--accent)}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb-sep{color:var(--ink-soft)}
.page-eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px}
h1.page-title{font-size:44px;font-weight:700;line-height:1.15;letter-spacing:-.02em;color:var(--ink);margin-bottom:16px}
@media (max-width:640px){h1.page-title{font-size:32px}}
.page-meta{display:flex;gap:20px;font-size:14px;color:var(--ink-soft);flex-wrap:wrap;margin-top:16px}
.page-meta time{font-variant-numeric:tabular-nums}

/* Article body */
.article{padding:48px 0 80px}
.article h2{font-size:30px;font-weight:700;line-height:1.25;letter-spacing:-.015em;color:var(--ink);margin:48px 0 16px}
.article h3{font-size:22px;font-weight:600;line-height:1.3;color:var(--ink);margin:36px 0 12px}
.article p{margin-bottom:20px;color:#1e293b;font-size:17px;line-height:1.7}
.article ul,.article ol{margin:0 0 24px 24px;color:#1e293b;font-size:17px;line-height:1.7}
.article li{margin-bottom:8px}
.article a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
.article a:hover{color:var(--accent-dark)}
.article blockquote{border-left:4px solid var(--accent);padding:8px 0 8px 20px;margin:24px 0;color:var(--ink-soft);font-style:italic;font-size:17px}
.article code{background:#f1f5f9;padding:2px 6px;border-radius:4px;font-size:14px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.article pre{background:#0f172a;color:#e2e8f0;padding:20px;border-radius:8px;overflow-x:auto;margin:24px 0;font-size:14px}
.article pre code{background:transparent;color:inherit;padding:0}
.article hr{border:0;border-top:1px solid var(--line);margin:48px 0}
.article-callout{background:var(--bg-soft);border:1px solid var(--line);border-left:4px solid var(--accent);padding:20px 24px;border-radius:8px;margin:24px 0;font-size:16px;color:var(--ink-soft)}
.article-callout strong{color:var(--ink)}
.article-toc{background:var(--bg-soft);border:1px solid var(--line);border-radius:8px;padding:20px 24px;margin-bottom:32px;font-size:15px}
.article-toc h2{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft);font-weight:600;margin:0 0 12px}
.article-toc ol{margin:0 0 0 20px;color:var(--ink-soft)}
.article-toc a{color:var(--accent);text-decoration:none}
.article-toc a:hover{text-decoration:underline}

/* Card grids (blog index, glossary index) */
.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px;padding:0 0 64px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:transform .2s,box-shadow .2s,border-color .2s}
.card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(15,23,42,.08);border-color:#cbd5e1}
.card-eyebrow{font-size:12px;color:var(--accent);font-weight:600;text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}
.card h3{font-size:20px;font-weight:600;line-height:1.3;color:var(--ink);margin-bottom:8px}
.card p{font-size:15px;color:var(--ink-soft);margin-bottom:12px}
.card-meta{font-size:13px;color:var(--ink-soft-2);display:flex;gap:12px;flex-wrap:wrap;margin-top:auto}

/* Footer CTA */
.footer-cta{background:var(--bg-soft);padding:64px 0;border-top:1px solid var(--line);text-align:center}
.footer-cta h2{font-size:28px;font-weight:700;margin-bottom:12px;color:var(--ink)}
.footer-cta p{font-size:17px;color:var(--ink-soft);max-width:520px;margin:0 auto 24px}

/* Footer */
footer{background:#fff;border-top:1px solid var(--line);padding:48px 0 32px;color:var(--ink-soft);font-size:14px}
footer .footer-bottom{margin-top:32px;padding-top:24px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:13px;flex-wrap:wrap;gap:12px}