:root{
  --bb-blue-dark:#153A6B;
  --bb-blue:#1F4E8C;
  --bb-blue-light:#E8F1FF;
  --bb-red:#E3322B;
  --bb-white:#FFFFFF;
  --bb-ink:#0E1116;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,'Segoe UI',Roboto,Arial,'Noto Sans',sans-serif;color:var(--bb-ink);background:#fff;line-height:1.55}
.container{width:min(1120px,92vw);margin:0 auto}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
h1,h2,h3{letter-spacing:-.015em}
.btn{display:inline-block;padding:14px 22px;border-radius:12px;font-weight:800;border:0;cursor:pointer;transition:transform .05s,opacity .2s,box-shadow .2s}
.btn-primary{background:var(--bb-red);color:#fff;box-shadow:0 10px 24px rgba(227,50,43,.28)}
.btn-primary:hover{opacity:.95;transform:translateY(-1px)}
.btn-outline{color:#fff;border:2px solid #fff;background:transparent}
.btn-outline:hover{background:#fff;color:var(--bb-blue-dark)}
.badge{font-size:12px;font-weight:800;color:var(--bb-blue);background:#eef3ff;padding:6px 10px;border-radius:999px}

header.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid #e9edf5}
.nav .bar{display:flex;align-items:center;justify-content:space-between;padding:12px 0;gap:16px}
.brand img{height:44px;width:auto}
.nav ul{list-style:none;display:flex;gap:22px;margin:0;padding:0}
.nav a.menu-link{color:var(--bb-blue);font-weight:700}
.nav a.menu-link:hover{color:var(--bb-red)}

.hero{
  color:#fff;
  padding:110px 0 86px;
  position:relative;overflow:hidden;
  background:
    linear-gradient(rgba(21,58,107,.58), rgba(21,58,107,.58)),
    url('assets/sfondo-bb.jpeg') center/cover no-repeat,
    radial-gradient(1200px 600px at 20% -10%, #204880 0%, var(--bb-blue-dark) 60%);
  background-blend-mode:multiply, normal, normal;
}
.hero h1{font-size:clamp(34px,4.6vw,58px);margin:0 0 14px}
.hero p.lead{margin:0 0 26px;font-size:clamp(16px,2.3vw,20px);opacity:.98;max-width:720px}
.hero .cta-row{display:flex;gap:14px;flex-wrap:wrap}
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px;max-width:760px}
.kpi{background:rgba(0,0,0,.18);border:1px solid rgba(255,255,255,.12);padding:14px;border-radius:12px}
.kpi strong{font-size:20px}

.section{padding:78px 0}
.section.alt{background:var(--bb-blue-light)}
.section h2{color:var(--bb-blue);font-size:clamp(26px,3.4vw,38px);margin:0 0 18px}
.section p.sub{color:#343b4a;opacity:.9;max-width:760px;margin:-6px 0 30px}

.features{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid #e9edf5;border-radius:14px;padding:22px}
.card h3{margin:8px 0 8px;color:var(--bb-blue-dark)}
.card .icon{font-size:28px}

.event-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:26px}
.event-box{background:#fff;border:1px solid #e9edf5;border-radius:14px;padding:18px}
.event-box .row{display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:12px;padding:10px 0;border-bottom:1px dashed #e1e6ef}
.event-box .row:last-child{border-bottom:0}
.event-aside{background:#f9fbff;border:1px solid #e9edf5;border-radius:14px;padding:18px}

.sponsor-cta{background:linear-gradient(180deg,var(--bb-blue) 0%,var(--bb-blue-dark) 100%);color:#fff;border-radius:16px;padding:28px;display:grid;grid-template-columns:1.2fr .8fr;gap:22px}
.sponsor-cta h2{color:#fff}

.contact-cta{background:linear-gradient(180deg,var(--bb-blue) 0%,var(--bb-blue-dark) 100%);color:#fff;border-radius:16px;padding:28px;display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:center}
.contact-cta h2{color:#fff;margin:0 0 8px}
.contact-cta p{opacity:.96;margin:0 0 16px}
.contact-buttons{display:flex;gap:12px;flex-wrap:wrap}
.btn-white{background:#fff;color:var(--bb-blue-dark);border:2px solid #fff}
.btn-white:hover{opacity:.95;transform:translateY(-1px)}
.btn-ig-white{background:#fff;color:var(--bb-blue-dark);border:2px solid #fff;display:inline-flex;align-items:center;gap:8px}
.btn-ig-white img{height:18px;width:18px}
.btn-ig-white:hover{opacity:.95;transform:translateY(-1px)}

footer{background:var(--bb-blue-dark);color:#fff}
.footer-inner{display:grid;gap:14px;padding:26px 0}
.footer-meta{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;border-top:1px solid rgba(255,255,255,.12);padding:16px 0;font-size:14px;opacity:.9}

.event-card img{border:1px solid #e9edf5;border-radius:10px}

/* ===== Carousel base styles (past events) ===== */
.carousel{position:relative}
.carousel-viewport{overflow-x:auto;scroll-snap-type:x mandatory;display:flex;gap:18px;padding:6px 6px 12px;scroll-behavior:smooth}
.carousel-viewport::-webkit-scrollbar{height:8px}
.carousel-viewport::-webkit-scrollbar-thumb{background:#d1d7e6;border-radius:999px}
.carousel-track{display:flex;gap:18px}
.carousel .event-card{min-width:320px;max-width:360px;scroll-snap-align:start}
.carousel .nav{position:absolute;top:50%;transform:translateY(-50%);display:flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:999px;border:1px solid #e9edf5;background:#fff;box-shadow:0 8px 18px rgba(16,24,40,.08);cursor:pointer}
.carousel .nav:hover{opacity:.9}
.carousel .prev{left:-10px}
.carousel .next{right:-10px}
@media(max-width:640px){
  .carousel .prev{left:4px}
  .carousel .next{right:4px}
  .carousel .event-card{min-width:86vw;max-width:86vw}
}

/* ===== Carousel dots & tweaks ===== */
.carousel-dots{display:flex;gap:8px;justify-content:center;align-items:center;margin-top:10px}
.carousel-dots button{width:8px;height:8px;border-radius:999px;border:0;background:#cfd6e6;cursor:pointer;transition:transform .15s, background .2s}
.carousel-dots button[aria-current="true"]{background:#1F4E8C;transform:scale(1.2)}
.carousel-dots button:hover{background:#4b6aa4}
.carousel:hover .nav{opacity:1}

@media(max-width:980px){
 .features{grid-template-columns:1fr}
 .event-grid{grid-template-columns:1fr}
 .kpis{grid-template-columns:1fr}
 .sponsor-cta{grid-template-columns:1fr}
 .contact-cta{grid-template-columns:1fr}
}