/* SIERTI — site estático (marca reaproveitada de /2026) */
:root{
  --primary:#0f172e; --primary-light:#1a2847;
  --accent:#0066ff; --accent-light:#3d8fff; --accent-hover:#0052cc;
  --white:#ffffff; --g50:#f8fafc; --g100:#f1f5f9; --g200:#e2e8f0;
  --g300:#cbd5e1; --g400:#94a3b8; --g500:#64748b; --g600:#475569;
  --g700:#334155; --g800:#1e293b; --g900:#0f172e;
  --font-display:'Sora',system-ui,sans-serif;
  --font-base:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --radius:14px; --shadow:0 10px 30px rgba(15,23,46,.08);
  --maxw:820px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-base);color:var(--g800);background:var(--white);
  line-height:1.7;font-size:1.0625rem;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-hover);text-decoration:underline}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:1rem;top:1rem;background:#fff;padding:.5rem 1rem;z-index:100;border-radius:8px}

/* Header */
.site-header{border-bottom:1px solid var(--g200);background:#fff;position:sticky;top:0;z-index:50}
.site-header .wrap{max-width:1100px;margin:0 auto;padding:.85rem 1.25rem;display:flex;align-items:center;justify-content:space-between}
.logo img{height:38px;width:auto;display:block}
.header-cta a{font-family:var(--font-display);font-weight:600;font-size:.9rem;
  background:var(--accent);color:#fff;padding:.55rem 1.1rem;border-radius:10px}
.header-cta a:hover{background:var(--accent-hover);text-decoration:none}

/* Layout */
.wrap{max-width:1100px;margin:0 auto;padding:0 1.25rem}
main{min-height:60vh}
.article{max-width:var(--maxw);margin:0 auto;padding:2.5rem 1.25rem 3rem}

/* Under-construction hero */
.hero-uc{background:linear-gradient(135deg,#0f172e 0%,#1a2847 55%,#0066ff 140%);
  color:#fff;text-align:center;padding:5rem 1.25rem 5.5rem}
.hero-uc img{height:64px;margin-bottom:1.75rem}
.hero-uc h1{font-family:var(--font-display);font-weight:700;font-size:clamp(1.7rem,4.5vw,2.75rem);
  margin:0 0 1rem;line-height:1.15}
.hero-uc p{max-width:600px;margin:0 auto 2rem;color:#c7d2e6;font-size:1.15rem}
.hero-uc .actions{display:flex;gap:.9rem;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;font-family:var(--font-display);font-weight:600;font-size:1rem;
  padding:.85rem 1.6rem;border-radius:12px;border:2px solid transparent;cursor:pointer;transition:.15s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-hover);text-decoration:none;color:#fff}
.btn-outline{border-color:rgba(255,255,255,.4);color:#fff;background:transparent}
.btn-outline:hover{border-color:#fff;text-decoration:none;color:#fff}
.uc-contact{text-align:center;padding:3rem 1.25rem 1rem;color:var(--g600)}
.uc-contact a{font-family:var(--font-display);font-weight:600}

/* Faixa de clientes */
.clients{padding:3.5rem 1.25rem 4.5rem;background:var(--white);text-align:center}
.clients h2{font-family:var(--font-display);font-weight:600;color:var(--g500);
  font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;margin:0 0 2rem}
.clients-grid{max-width:1000px;margin:0 auto;display:grid;
  grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:1.75rem 1.25rem;align-items:center;justify-items:center}
.clients-grid img{max-height:52px;max-width:120px;width:auto;object-fit:contain;
  filter:grayscale(1);opacity:.55;transition:.25s ease}
.clients-grid img:hover{filter:grayscale(0);opacity:1}
@media (max-width:640px){
  .clients-grid{grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:1.4rem 1rem}
  .clients-grid img{max-height:40px;max-width:92px}
}

/* Article typography */
.article h1{font-family:var(--font-display);font-weight:700;color:var(--primary);
  font-size:clamp(1.7rem,4vw,2.4rem);line-height:1.2;margin:0 0 .75rem}
.article .meta{color:var(--g500);font-size:.9rem;margin-bottom:2rem;
  border-bottom:1px solid var(--g200);padding-bottom:1.25rem}
.article .featured{border-radius:var(--radius);margin:0 0 2rem;box-shadow:var(--shadow)}
.article h2{font-family:var(--font-display);font-weight:600;color:var(--primary);
  font-size:1.6rem;margin:2.5rem 0 .9rem;line-height:1.25}
.article h3{font-family:var(--font-display);font-weight:600;color:var(--primary-light);
  font-size:1.25rem;margin:2rem 0 .75rem}
.article p{margin:0 0 1.25rem}
.article ul,.article ol{margin:0 0 1.25rem;padding-left:1.4rem}
.article li{margin:.4rem 0}
.article img{border-radius:10px;margin:1.25rem 0}
.article blockquote{border-left:4px solid var(--accent);background:var(--g50);
  margin:1.5rem 0;padding:1rem 1.25rem;border-radius:0 10px 10px 0;color:var(--g700)}
.article pre{background:var(--primary);color:#e2e8f0;padding:1.1rem 1.25rem;border-radius:10px;
  overflow-x:auto;font-size:.9rem;line-height:1.5;margin:1.5rem 0}
.article code{background:var(--g100);color:var(--g900);padding:.15em .4em;border-radius:6px;font-size:.9em}
.article pre code{background:none;color:inherit;padding:0}
.article table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.95rem;display:block;overflow-x:auto}
.article th,.article td{border:1px solid var(--g200);padding:.6rem .8rem;text-align:left}
.article th{background:var(--g50);font-weight:600}
.article a{text-decoration:underline}

/* Attribution / AI source box */
.attribution{margin:3rem 0 0;padding:1.25rem 1.4rem;background:var(--g50);
  border:1px solid var(--g200);border-radius:var(--radius);font-size:.92rem;color:var(--g600)}
.attribution strong{color:var(--primary)}
.attribution .brand{display:inline-flex;align-items:center;gap:.5rem}
.attribution img{height:22px;margin:0}

/* Footer */
.site-footer{background:var(--primary);color:var(--g400);margin-top:4rem;padding:2.5rem 1.5rem 2rem}
.site-footer .wrap{max-width:1100px;margin:0 auto}
.footer-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1.25rem 2rem}
.footer-top img{height:26px;opacity:.92}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:.7rem;font-size:.85rem}
.footer-legal a{color:var(--g300)}
.footer-legal a:hover{color:#fff;text-decoration:none}
.footer-legal .sep{color:var(--g600);user-select:none;font-size:.8rem}
.footer-bottom{margin-top:1.75rem;padding-top:1.25rem;border-top:1px solid rgba(255,255,255,.08);
  text-align:center;font-size:.78rem;color:var(--g500)}
@media (max-width:560px){
  .footer-top{flex-direction:column;text-align:center;gap:1.25rem}
  .footer-legal{justify-content:center}
}

@media (max-width:640px){
  body{font-size:1rem}
  .article{padding:1.75rem 1.1rem 2.5rem}
}