:root{
  --aurora-pink: var(--accent);
  --aurora-aqua: var(--accent-2);
}

body{
  background:
    radial-gradient(at 20% 30%, color-mix(in srgb, var(--accent) 55%, transparent) 0, transparent 50%),
    radial-gradient(at 80% 20%, color-mix(in srgb, var(--accent-2) 55%, transparent) 0, transparent 50%),
    radial-gradient(at 50% 80%, color-mix(in srgb, var(--accent) 40%, var(--accent-2)) 0, transparent 50%),
    var(--bg);
  background-attachment: fixed;
  background-size: 160% 160%, 160% 160%, 160% 160%, auto;
  animation: auroraDrift 28s ease-in-out infinite alternate;
}

@keyframes auroraDrift{
  0%{ background-position: 0% 0%, 100% 0%, 50% 100%, 0 0; }
  100%{ background-position: 30% 20%, 70% 30%, 40% 70%, 0 0; }
}

/* subtle grain */
body::after{
  content:"";
  position:fixed; inset:0; pointer-events:none; z-index:0;
  opacity:.06;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.site-header{
  background: color-mix(in srgb, var(--panel) 78%, transparent);
  backdrop-filter: blur(12px) saturate(140%);
  border-bottom:1px solid var(--line);
}

.hero{
  background:
    radial-gradient(at 15% 25%, color-mix(in srgb, var(--accent) 30%, transparent) 0, transparent 55%),
    radial-gradient(at 85% 30%, color-mix(in srgb, var(--accent-2) 28%, transparent) 0, transparent 55%);
  border-radius: calc(var(--radius) * 1.4);
}

.hero-title{
  font-weight:800;
  letter-spacing:-0.01em;
  background: linear-gradient(100deg, var(--accent) 0%, var(--accent-2) 60%, var(--text) 100%);
  -webkit-background-clip:text; background-clip:text;
  color:transparent;
}

.section{
  background:
    radial-gradient(at 70% 0%, color-mix(in srgb, var(--accent-2) 10%, transparent) 0, transparent 60%);
}

.card,.feature,.faq-item,.tile,.fact{
  position:relative;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 92%, var(--accent) 8%), var(--panel-2));
  border:1px solid var(--line);
  border-radius:var(--radius);
  background-position:0 0;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease, background-position 6s ease;
  box-shadow: 0 10px 30px -18px rgba(0,0,0,.7);
}

.card::before,.feature::before{
  content:""; position:absolute; inset:0; padding:1px;
  border-radius:inherit; pointer-events:none; opacity:0;
  background:linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude;
  transition:opacity .35s ease;
}

.card:hover,.feature:hover,.tile:hover{
  transform:translateY(-5px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
  box-shadow:
    0 22px 50px -22px color-mix(in srgb, var(--accent) 45%, black),
    0 0 0 1px color-mix(in srgb, var(--accent-2) 25%, transparent);
  background-position:40px 0;
}

.card:hover::before,.feature:hover::before{ opacity:1; }

.feature .icon{
  color:var(--on-accent);
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius:calc(var(--radius) * .7);
  box-shadow:0 8px 24px -10px color-mix(in srgb, var(--accent) 60%, transparent);
}

.btn-primary{
  background:linear-gradient(100deg, var(--accent), var(--accent-2));
  color:var(--on-accent);
  border:none;
  border-radius:999px;
  font-weight:700;
  box-shadow:0 10px 28px -12px color-mix(in srgb, var(--accent) 70%, transparent);
  transition:transform .25s ease, box-shadow .25s ease, filter .25s ease;
}
.btn-primary:hover{ transform:translateY(-2px); filter:brightness(1.08); box-shadow:0 16px 36px -12px color-mix(in srgb, var(--accent-2) 65%, transparent); }

.btn-ghost{
  border:1px solid var(--line);
  border-radius:999px;
  background:color-mix(in srgb, var(--panel) 70%, transparent);
  color:var(--text);
  transition:border-color .25s ease, background .25s ease, transform .25s ease;
}
.btn-ghost:hover{ transform:translateY(-2px); border-color:var(--accent); background:color-mix(in srgb, var(--accent) 12%, var(--panel)); }

.badge{
  border:1px solid var(--line);
  border-radius:999px;
  background:color-mix(in srgb, var(--accent) 14%, var(--panel));
  color:var(--text);
  letter-spacing:.02em;
}

.tab{
  border:1px solid var(--line);
  border-radius:999px;
  background:color-mix(in srgb, var(--panel) 80%, transparent);
  transition:all .25s ease;
}
.tab.active{
  background:linear-gradient(100deg, var(--accent), var(--accent-2));
  color:var(--on-accent);
  border-color:transparent;
}

.tile .nm{ font-weight:700; color:var(--text); }
.tile .gp{ color:var(--text-2); }
.tile.noimg{
  background:
    radial-gradient(at 30% 20%, color-mix(in srgb, var(--accent) 22%, transparent) 0, transparent 60%),
    linear-gradient(180deg, var(--panel), var(--panel-2));
}

.faq-item{ overflow:hidden; }
.faq-item .faq-q{ font-weight:600; color:var(--text); }
.faq-item:hover{ border-color:color-mix(in srgb, var(--accent-2) 40%, var(--line)); }

.table{ border-radius:var(--radius); overflow:hidden; }
.table th{
  background:color-mix(in srgb, var(--accent) 16%, var(--panel));
  color:var(--text);
}
.table tr:hover td{ background:color-mix(in srgb, var(--accent-2) 8%, transparent); }

.article h2{
  font-weight:700;
  letter-spacing:-0.005em;
  color:var(--text);
}
.article h2::after{
  content:""; display:block; width:64px; height:3px; margin-top:.4rem;
  border-radius:999px;
  background:linear-gradient(90deg, var(--accent), var(--accent-2));
}

.fact b{
  background:linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip:text; background-clip:text; color:transparent;
  font-weight:800;
}

.section, .hero, .card, .feature{ position:relative; z-index:1; }