:root{
  --ink:#161c2d; --ink-soft:#4b5468; --line:#e4e7ee; --bg:#f6f7fb; --card:#fff;
  --accent:#3b5bfd; --accent-ink:#fff;
}
*{box-sizing:border-box;}
body{margin:0; font-family:'IBM Plex Sans',system-ui,sans-serif; color:var(--ink); background:var(--bg);}
h1,h2,h3{font-family:'Manrope',system-ui,sans-serif; margin:0 0 6px;}
a{color:var(--accent);}
.site-topbar{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  background:var(--ink); color:#fff; padding:14px 24px; flex-wrap:wrap;
}
.site-brand{display:flex; align-items:center; gap:12px;}
.site-brand img{height:44px; width:44px; object-fit:contain; border-radius:8px; background:#fff;}
.site-brand-text h1{font-size:18px; color:#fff;}
.site-brand-text p{margin:0; font-size:12.5px; color:#c7cbe0;}
.topbar-actions{display:flex; align-items:center; gap:10px;}
.btn-plataforma{
  display:inline-flex; align-items:center; gap:8px; background:var(--accent); color:var(--accent-ink);
  padding:9px 16px; border-radius:8px; text-decoration:none; font-weight:600; font-size:13.5px;
}
.site-nav{
  display:flex; gap:4px; padding:0 24px; background:#fff; border-bottom:1px solid var(--line);
  overflow-x:auto;
}
.site-nav a{
  padding:12px 14px; color:var(--ink-soft); text-decoration:none; font-weight:600; font-size:13.5px; white-space:nowrap;
}
.site-nav a:hover{color:var(--accent);}
main{max-width:1080px; margin:0 auto; padding:0 24px;}
.hero{padding:48px 0 32px; max-width:640px;}
.hero h2{font-size:30px;}
.hero p{color:var(--ink-soft); font-size:15.5px; line-height:1.55;}
section{padding:32px 0; border-top:1px solid var(--line);}
.section-head h2{font-size:20px;}
.section-head p{margin:0; color:var(--ink-soft); font-size:13.5px;}
.sponsors-row{display:flex; flex-wrap:wrap; gap:18px; margin-top:16px;}
.sponsors-row a, .sponsors-row .sponsor-item{
  display:flex; align-items:center; justify-content:center; background:var(--card); border:1px solid var(--line);
  border-radius:10px; padding:14px 20px; min-width:120px;
}
.sponsors-row img{max-height:40px; max-width:140px; object-fit:contain;}
.empty-note{color:var(--ink-soft); font-size:13px; margin-top:12px;}
.contact-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:14px; margin-top:16px;}
.contact-card{background:var(--card); border:1px solid var(--line); border-radius:10px; padding:16px;}
.contact-card h3{font-size:13.5px; text-transform:uppercase; letter-spacing:.03em; color:var(--ink-soft);}
.contact-card p{margin:4px 0 0; font-size:14.5px;}
.site-footer{
  margin-top:24px; padding:24px; text-align:center; color:var(--ink-soft); font-size:12.5px;
  background:#fff; border-top:1px solid var(--line);
}
.site-footer div{margin:2px 0;}
@media (max-width:640px){
  .hero{padding:32px 0 24px;} .hero h2{font-size:24px;}
}