/* ADRDN Styles (mobile-optimized, inline desktop nav) — 2025-10-15 */
:root{
  --bg:#0b132b; --card:#ffffff; --muted:#e9eef6; --accent:#2d6cdf; --accent-2:#21ba72;
  --text:#0f1a2d; --border:#e6ecf4; --max:1100px; --radius:14px; --shadow:0 8px 24px rgba(0,0,0,.16);
}
*{box-sizing:border-box} html,body{margin:0;padding:0}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:#fff;line-height:1.6}
img{max-width:100%;height:auto;display:block} a{color:inherit;text-decoration:none}
a:focus,button:focus{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:var(--max);margin:0 auto;padding:20px}

/* Header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(11,19,43,.9);backdrop-filter:saturate(180%) blur(6px);border-bottom:1px solid rgba(255,255,255,.08)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand img{height:34px;width:auto}

.menu-toggle{display:none;align-items:center;justify-content:center;width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.18);background:#ffffff14;color:#fff;cursor:pointer}
.menu-toggle svg{width:22px;height:22px}

.nav-inline ul{list-style:none;display:flex;gap:18px;margin:0;padding:0;align-items:center;flex-wrap:wrap}
.nav-inline a{opacity:.95} .nav-inline a:hover{opacity:1}
.lang-toggle{display:flex;gap:8px;align-items:center}

.btn,button{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:10px;border:1px solid rgba(255,255,255,.18);background:#ffffff14;color:#fff;cursor:pointer}
.btn.primary{background:var(--accent);border-color:var(--accent)}
.btn.secondary{background:#ffffff1f}

/* Mobile menu overlay */
.nav-links{display:none;position:fixed;inset:60px 0 0 0;background:rgba(11,19,43,.98);border-top:1px solid rgba(255,255,255,.12)}
.nav-links .wrap{padding:16px}
.nav-links ul{list-style:none;display:flex;flex-direction:column;gap:12px;margin:0;padding:0}
body.nav-open .nav-links{display:block}

/* Hero */
.hero{padding:56px 0;background:
  radial-gradient(900px 380px at 0% -10%, #3659b7 0%, rgba(54,89,183,0) 70%),
  radial-gradient(900px 500px at 100% 0%, #1fa77e 0%, rgba(31,167,126,0) 70%)}
.hero .grid{display:grid;grid-template-columns:1.2fr 1fr;gap:24px;align-items:center}
.card{background:var(--card);color:var(--text);border-radius:var(--radius);box-shadow:var(--shadow)}
.card.pad{padding:18px}
h1{font-size:clamp(26px,5vw,40px);line-height:1.15;margin:0 0 8px}
h2{font-size:clamp(20px,3.5vw,28px);margin:20px 0 10px}
p{margin:0 0 10px}
.cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.badges{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}

/* Sections */
.section{background:#f7f9fc;color:var(--text)}
.section.alt{background:#fff}
.section .wrap{padding:36px 20px}

.grid{display:grid;gap:20px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tile{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:16px}
.tile h3{margin:.2rem 0 .4rem}
.tile p{margin:0}

.list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.list .item{display:flex;gap:10px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:12px;padding:10px}

.rounded{border-radius:14px} .shadow{box-shadow:0 8px 24px rgba(0,0,0,.18)}
.hero-img{width:100%;height:auto;object-fit:cover}
.tile img{width:100%;height:180px;object-fit:cover;border-radius:10px;margin-bottom:10px}

/* Sponsors */
.sponsors h2{margin-bottom:12px}
.sponsor-logos{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:18px;align-items:center}
.sponsor-logos img{max-height:44px;width:auto;display:block;margin:0 auto;filter:grayscale(100%);opacity:.85;transition:all .2s ease}
.sponsor-logos a:hover img{filter:none;opacity:1}

/* Calendar iframe */
iframe.responsive{width:100%;min-height:520px;border:0;border-radius:12px}

/* Footer */
.site-footer{background:#0a1025;border-top:1px solid rgba(255,255,255,.1);color:#cbd5e1}
.site-footer .wrap{padding:24px 20px;display:grid;gap:8px}
.site-footer a{color:#cbd5e1;text-decoration:underline}
.muted{opacity:.85}

/* Responsive switching */
@media (max-width: 900px){
  .hero .grid{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .list{grid-template-columns:1fr}
  .menu-toggle{display:inline-flex}
  .nav-inline{display:none}
}
@media (min-width: 901px){
  .nav-links{display:none !important}
}
/* Sponsor logos */
.sponsor-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  padding: 2rem 0;
}

.sponsor-logos a img {
  height: 60px;
  width: auto;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.8;
  transition: filter 0.3s, opacity 0.3s, transform 0.3s;
}

.sponsor-logos a img:hover {
  filter: grayscale(0%);
  opacity: 1;
  transform: scale(1.05);
}