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;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  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)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.5;
}

.container { position: relative; z-index: 1; }

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

.hero {
  background:
    radial-gradient(at 15% 25%, color-mix(in srgb, var(--accent) 35%, transparent) 0, transparent 55%),
    radial-gradient(at 85% 15%, color-mix(in srgb, var(--accent-2) 35%, transparent) 0, transparent 55%),
    radial-gradient(at 55% 90%, color-mix(in srgb, var(--accent) 25%, var(--accent-2)) 0, transparent 55%);
  background-size: 200% 200%;
  animation: auroraDrift 22s ease-in-out infinite;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

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

.hero-sub { color: var(--prose); }

.fact {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-size: 200% 200%;
  animation: auroraDrift 30s ease-in-out infinite;
}
.fact b { color: var(--accent-2); }

.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 75%, transparent);
  backdrop-filter: blur(10px);
}

.card, .feature {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-size: 220% 220%;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
  animation: auroraDrift 36s ease-in-out infinite;
}
.card:hover, .feature:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
  box-shadow: 0 14px 40px -16px color-mix(in srgb, var(--accent) 60%, transparent);
}

.feature .icon {
  color: var(--on-accent);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: calc(var(--radius) * 0.7);
  box-shadow: 0 6px 18px -8px color-mix(in srgb, var(--accent-2) 70%, transparent);
}

.badge {
  background: color-mix(in srgb, var(--accent) 18%, var(--panel));
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
  color: var(--text);
  border-radius: 999px;
}

.btn {
  border-radius: 999px;
  border: 1px solid var(--line);
  transition: transform .25s ease, box-shadow .25s ease, filter .25s ease;
}
.btn-primary {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  color: var(--on-accent);
  border-color: transparent;
  font-weight: 700;
  box-shadow: 0 8px 26px -10px color-mix(in srgb, var(--accent) 70%, transparent);
}
.btn-primary:hover { transform: translateY(-2px); filter: brightness(1.06); }
.btn-ghost:hover {
  border-color: color-mix(in srgb, var(--accent-2) 50%, var(--line));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent-2) 40%, transparent);
}

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

.tile {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.tile:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  box-shadow: 0 16px 44px -18px color-mix(in srgb, var(--accent-2) 65%, transparent);
}
.tile.noimg {
  background:
    radial-gradient(at 25% 25%, color-mix(in srgb, var(--accent) 40%, transparent) 0, transparent 60%),
    radial-gradient(at 80% 80%, color-mix(in srgb, var(--accent-2) 40%, transparent) 0, transparent 60%),
    var(--panel-2);
}
.tile .gp { color: var(--accent-2); }
.tile .nm { color: var(--text); font-weight: 700; }

.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: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.table th {
  background: color-mix(in srgb, var(--accent) 14%, var(--panel));
  color: var(--text);
}
.table td { border-top: 1px solid var(--line); }

.faq-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .25s ease;
}
.faq-item:hover { border-color: color-mix(in srgb, var(--accent-2) 45%, var(--line)); }
.faq-q { color: var(--text); font-weight: 600; }
.faq-a { color: var(--prose); }

.site-footer { border-top: 1px solid var(--line); }

a { transition: color .2s ease; }
.article a { color: var(--accent-2); }
.article a:hover { color: var(--accent); }