:root{
  --bg:#0b0b13; /* deep charcoal */
  --bg-elev:#121224;
  --text:#e9e7ee;
  --muted:#b9b4c7;
  --accent:#ff3cac; /* pink */
  --accent-2:#a64aff; /* purple */
  --card:#141427;
  --border:#24243a;
}

*{ box-sizing:border-box }
 html,body{ margin:0; padding:0 }
 html{ height:100% }
body{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  background-color:var(--bg);
  background-image:
    radial-gradient(1200px 600px at 20% -10%, rgba(255,60,172,.15), transparent 60%),
    radial-gradient(1000px 500px at 90% 10%, rgba(166,74,255,.12), transparent 60%);
  background-repeat:no-repeat, no-repeat;
  background-size:180% 140%, 160% 120%;
  background-attachment:fixed, fixed;
  color:var(--text);
  font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}

img{ max-width:100%; height:auto; display:block }

.container{ width:100%; max-width:1180px; margin:0 auto; padding:0 16px }

.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(11,11,19,.8); backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--border);
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; padding:12px 0; min-height:56px }
.brand{ display:inline-flex; align-items:center; gap:10px; text-decoration:none }
.site-nav ul{ list-style:none; margin:0; padding:0; display:flex; gap:14px; flex-wrap:wrap }
.site-nav a{
  color:var(--text); text-decoration:none; padding:8px 12px; border-radius:10px;
  background:linear-gradient(135deg, rgba(255,60,172,.08), rgba(166,74,255,.08));
  border:1px solid var(--border);
}
.site-nav a:hover{ background:linear-gradient(135deg, rgba(255,60,172,.18), rgba(166,74,255,.18)) }

/* Registration button */
.btn-register{
  display:inline-flex; align-items:center; justify-content:center;
  padding:10px 20px; border-radius:12px; font-weight:600; text-decoration:none;
  background:linear-gradient(120deg, var(--accent), var(--accent-2));
  color:#fff; box-shadow:0 4px 16px rgba(166,74,255,.3);
  border:1px solid rgba(255,255,255,.2); white-space:nowrap;
  transition:transform .2s ease, box-shadow .2s ease;
}
.btn-register:hover{
  transform:translateY(-1px);
  box-shadow:0 6px 20px rgba(166,74,255,.4);
}
.btn-register:focus-visible{
  outline:2px solid #fff; outline-offset:2px;
}

/* Burger */
.nav-toggle{
  display:none;
  width:44px; height:36px; border-radius:10px; border:1px solid var(--border);
  background:linear-gradient(135deg, rgba(255,60,172,.08), rgba(166,74,255,.08));
  align-items:center; justify-content:center; gap:4px; cursor:pointer; padding:6px 8px;
}
.nav-toggle .bar{ display:block; width:100%; height:2px; background:var(--text); border-radius:2px }

@media (max-width: 920px){
  .nav-toggle{ display:inline-flex; flex-direction:column; gap:4px; order:3 }
  .btn-register{ padding:8px 16px; font-size:14px; order:2 }
  .site-nav{ display:none; position:fixed; left:0; right:0; top:92px; background:rgba(11,11,19,.98); border-top:1px solid var(--border); max-height:calc(100vh - 56px); overflow:auto; z-index:60; order:4 }
  .site-nav ul{ flex-direction:column; gap:0 }
  .site-nav li{ border-bottom:1px solid var(--border) }
  .site-nav a{ display:block; padding:14px 16px; background:none; border:none }
  .site-nav.open{ display:block }
}

@media (max-width: 480px){
  .btn-register{ padding:8px 14px; font-size:13px }
}

.content{ padding:28px 0 60px }
 main.content{ flex:1 0 auto }
section{ background:var(--card); border:1px solid var(--border); border-radius:16px; padding:18px 16px; margin:16px 0 }

.banner{ overflow:hidden; border-radius:16px; border:1px solid var(--border); margin:16px 0 }
.banner-hero img{ object-fit:cover; width:100% }
.banner-mid img{ object-fit:cover; width:100% }

/* Banner carousel */
.banner-carousel{
  position:relative;
  width:100%;
  margin:16px 0;
  border-radius:16px;
  border:1px solid var(--border);
  overflow:hidden;
  aspect-ratio:1920/600;
  background:var(--bg-elev);
}
.banner-carousel-link{
  display:block;
  position:relative;
  width:100%;
  height:100%;
  text-decoration:none;
}
.banner-carousel-img{
  position:absolute;
  top:0;
  left:0;
  width:100%;
 
  object-fit:cover;
  object-position:center;
  opacity:0;
  transition:opacity 1s ease-in-out;
  display:block;
}
.banner-carousel-img.active{
  opacity:1;
}

h1,h2,h3,h4{ color:var(--text); margin:0 0 8px; line-height:1.25 }
h1{
  font-weight:800; letter-spacing:.2px;
  font-size:clamp(1.6rem, 2.2vw + 1rem, 2.4rem);
  background:linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
h2{
  font-weight:700; letter-spacing:.15px;
  font-size:clamp(1.2rem, 1.2vw + .9rem, 1.6rem);
  color:#f3f1f8;
}
p{ color:var(--muted); margin:0 0 12px; line-height:1.75; letter-spacing:.1px }
ul{ margin:0 0 10px 18px }
strong{ color:#fff }

.site-footer{
  border-top:1px solid var(--border);
  background:
    radial-gradient(600px 200px at 100% 0%, rgba(166,74,255,.12), transparent 60%),
    radial-gradient(500px 180px at 0% 0%, rgba(255,60,172,.10), transparent 60%),
    var(--bg-elev);
}
.footer-inner{ display:flex; align-items:center; justify-content:space-between; gap:16px; padding:22px 0; flex-wrap:wrap }
.site-footer nav ul{ list-style:none; margin:0; padding:0; display:flex; gap:8px; flex-wrap:wrap }
.site-footer a{ color:var(--muted); text-decoration:none; padding:8px 12px; border-radius:10px; border:1px solid var(--border); position:relative; transition:border-color .2s ease, color .2s ease }
.site-footer a:after{ content:""; position:absolute; left:12px; right:12px; bottom:6px; height:1px; background:linear-gradient(90deg, var(--accent), var(--accent-2)); opacity:0; transform:scaleX(.4); transform-origin:left; transition:opacity .2s ease, transform .2s ease }
.site-footer a:hover{ color:#fff; border-color:var(--accent) }
.site-footer a:hover:after{ opacity:1; transform:scaleX(1) }
.legal{ color:var(--muted); margin:0; opacity:.9 }

@media (max-width: 720px){
  .header-inner{ padding:10px 0 }
  .site-nav ul{ gap:8px }
  section{ padding:14px 12px }
  .footer-inner{ flex-direction:column; align-items:flex-start; gap:12px }
  .site-footer nav ul{ gap:6px }

}

/* Back to top button */
.back-to-top{
  position:fixed; right:18px; bottom:18px; z-index:70;
  width:44px; height:44px; border-radius:12px; border:1px solid var(--border);
  background:linear-gradient(135deg, rgba(255,60,172,.18), rgba(166,74,255,.18));
  color:var(--text); display:inline-flex; align-items:center; justify-content:center;
  box-shadow:0 6px 24px rgba(0,0,0,.35);
  opacity:0; pointer-events:none; transform:translateY(8px); transition:opacity .2s ease, transform .2s ease, background .2s ease;
}
.back-to-top.show{ opacity:1; pointer-events:auto; transform:translateY(0) }
.back-to-top:hover{ background:linear-gradient(135deg, rgba(255,60,172,.28), rgba(166,74,255,.28)) }
.back-to-top:focus{ outline:2px solid var(--accent); outline-offset:2px }
.back-to-top svg{ width:18px; height:18px }

/* Error page */
.error-page{ display:flex; flex-direction:column; gap:18px }
.error-hero{
  display:grid; grid-template-columns:repeat(auto-fit, minmax(260px, 1fr));
  gap:32px; align-items:center;
  background:linear-gradient(135deg, rgba(166,74,255,.14), rgba(255,60,172,.08));
  border:1px solid var(--border); border-radius:18px; padding:32px;
  position:relative; overflow:hidden;
}
.error-copy h1{ margin-bottom:12px }
.eyebrow{
  text-transform:uppercase; letter-spacing:.2em; font-size:.8rem;
  color:var(--muted); margin:0 0 10px; display:inline-block;
}
.error-actions{ display:flex; flex-wrap:wrap; gap:12px; margin-top:20px }
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 20px; border-radius:12px; font-weight:600; text-decoration:none;
  border:1px solid transparent; transition:transform .2s ease, border-color .2s ease, background .2s ease;
}
.btn-primary{
  background:linear-gradient(120deg, var(--accent), var(--accent-2));
  color:#fff; box-shadow:0 12px 30px rgba(166,74,255,.28);
}
.btn-primary:hover{ transform:translateY(-1px) }
.btn-ghost{
  border-color:var(--border); color:var(--text);
  background:rgba(255,255,255,.02);
}
.btn-ghost:hover{ border-color:var(--accent); color:#fff }
.error-visual{
  position:relative; display:flex; align-items:center; justify-content:center;
  min-height:220px;
}
.error-code{
  font-size:clamp(4rem, 20vw, 8rem); font-weight:800; letter-spacing:.1em;
  color:rgba(233,231,238,.9); text-shadow:0 10px 30px rgba(0,0,0,.5);
}
.error-glow{
  position:absolute; width:200px; height:200px; border-radius:50%;
  background:radial-gradient(circle, rgba(255,60,172,.4), transparent 65%);
  filter:blur(10px); opacity:.7;
}
.error-links{
  border:1px solid var(--border); border-radius:16px; padding:24px;
  background:rgba(255,255,255,.02);
}
.error-links ul{
  list-style:none; margin:0; padding:0; display:grid;
  grid-template-columns:repeat(auto-fit, minmax(180px, 1fr)); gap:12px;
}
.error-links a{
  display:block; padding:12px 14px; border-radius:12px;
  border:1px solid rgba(255,255,255,.08); text-decoration:none; color:var(--text);
  background:linear-gradient(135deg, rgba(255,60,172,.04), rgba(166,74,255,.04));
}
.error-links a:hover{ border-color:var(--accent); color:#fff }
.error-help{
  display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr));
  gap:18px; border:1px solid var(--border); border-radius:16px; padding:24px;
  background:var(--card);
}
.error-help h3{ margin-bottom:8px }

/* Inline promo buttons injected by JS */
.cta-promo-wrapper{
  margin:28px 0;
  display:flex;
  justify-content:center;
}
.cta-promo{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:14px 24px;
  border-radius:999px;
  background:linear-gradient(120deg, rgba(255,60,172,.9), rgba(166,74,255,.9));
  color:#fff;
  text-decoration:none;
  text-align: center;
  font-weight:600;
  letter-spacing:.02em;
  box-shadow:0 10px 30px rgba(0,0,0,.35);
  border:1px solid rgba(255,255,255,.3);
  transition:transform .2s ease, box-shadow .2s ease;
}
.cta-promo:hover{
  transform:translateY(-2px) scale(1.01);
  box-shadow:0 16px 36px rgba(255,60,172,.35);
}
.cta-promo:focus-visible{
  outline:2px solid #fff;
  outline-offset:3px;
}