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

/* ===== Aurora Mesh base canvas ===== */
body {
  background-color: var(--bg);
  background-image:
    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%);
  background-attachment: fixed;
  background-size: 160% 160%, 160% 160%, 160% 160%;
  background-position: 0% 0%, 100% 0%, 50% 100%;
  animation: aurora-drift 24s ease-in-out infinite alternate;
}

@keyframes aurora-drift {
  0%   { background-position: 0% 0%, 100% 0%, 50% 100%; }
  50%  { background-position: 10% 12%, 88% 8%, 42% 90%; }
  100% { background-position: 4% 6%, 96% 4%, 55% 94%; }
}

/* subtle grain overlay on hero/sections */
.hero::after,
.section::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  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='0.05'/%3E%3C/svg%3E");
}
.hero, .section { position: relative; }
.hero > *, .section > * { position: relative; z-index: 1; }

.hero {
  background-image:
    radial-gradient(at 25% 25%, color-mix(in srgb, var(--accent) 35%, transparent) 0, transparent 55%),
    radial-gradient(at 75% 30%, color-mix(in srgb, var(--accent-2) 35%, transparent) 0, transparent 55%);
}

/* ===== Panels / cards ===== */
.card, .feature, .faq-item, .tile, .article, .fact {
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-size: 200% 200%;
  background-position: 0% 50%;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease, background-position 6s ease;
  box-shadow: 0 8px 30px rgba(0,0,0,.35);
}

.card:hover, .feature:hover, .tile:hover, .fact:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
  background-position: 100% 50%;
  box-shadow:
    0 14px 44px rgba(0,0,0,.45),
    0 0 0 1px color-mix(in srgb, var(--accent-2) 40%, transparent);
}

/* accent top hairline on cards */
.card::before, .feature::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: .8;
}
.card, .feature { position: relative; overflow: hidden; }

/* ===== Feature icons ===== */
.feature .icon {
  color: var(--on-accent);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: calc(var(--radius) * .7);
  box-shadow: 0 6px 20px color-mix(in srgb, var(--accent) 35%, transparent);
}

/* ===== Buttons ===== */
.btn {
  border-radius: 999px;
  transition: transform .25s ease, box-shadow .25s ease, filter .25s ease;
}
.btn-primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: var(--on-accent);
  border: none;
  box-shadow: 0 8px 26px color-mix(in srgb, var(--accent) 40%, transparent);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 34px color-mix(in srgb, var(--accent-2) 50%, transparent);
}
.btn-ghost {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 70%, transparent);
}
.btn-ghost:hover {
  border-color: var(--accent-2);
  color: var(--text);
}

/* ===== Badges & tabs ===== */
.badge {
  border: 1px solid var(--line);
  background: linear-gradient(120deg,
    color-mix(in srgb, var(--accent) 22%, var(--panel)),
    color-mix(in srgb, var(--accent-2) 22%, var(--panel)));
  border-radius: 999px;
  color: var(--text);
}
.tab {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-2);
  transition: all .25s ease;
}
.tab.active {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: var(--on-accent);
  border-color: transparent;
}

/* ===== Tiles ===== */
.tile .gp { color: var(--text-2); }
.tile .nm { color: var(--text); font-weight: 600; }
.tile.noimg {
  background:
    radial-gradient(at 30% 20%, color-mix(in srgb, var(--accent) 30%, transparent) 0, transparent 60%),
    radial-gradient(at 80% 90%, color-mix(in srgb, var(--accent-2) 30%, transparent) 0, transparent 60%),
    var(--panel);
}

/* ===== Headings ===== */
.hero-title, .article h2 {
  letter-spacing: -0.01em;
  font-weight: 700;
}
.hero-title {
  background: linear-gradient(100deg, var(--text), var(--accent-2) 60%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.article h2 { color: var(--text); }

/* ===== Site header / FAQ ===== */
.site-header {
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.faq-item { overflow: hidden; }
.faq-q { color: var(--text); font-weight: 600; }
.faq-item:hover { border-color: color-mix(in srgb, var(--accent-2) 45%, var(--line)); }

/* ===== Table ===== */
.table th {
  background: linear-gradient(120deg,
    color-mix(in srgb, var(--accent) 18%, var(--panel)),
    color-mix(in srgb, var(--accent-2) 18%, var(--panel)));
  color: var(--text);
  border-bottom: 1px solid var(--line);
}
.table td { border-bottom: 1px solid var(--line); color: var(--prose); }