/* -----------------------------
   CCU • Hybrid Intelligence FAQ
   ----------------------------- */
:root{
  --bg:#070a0c;
  --bg-deep:#040608;
  --panel:#0b1114;
  --panel-2:#0e171b;
  --gold:#ffd57a;
  --emerald:#1de9b6;
  --blue:#4fc3f7;
  --text:#ecf3f6;
  --muted:#9fb1b8;
  --shadow:0 10px 40px rgba(0,0,0,.45);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;
  color:var(--text);
  background: radial-gradient(1200px 800px at 80% -10%, rgba(77,195,247,.06), transparent 60%),
              radial-gradient(1000px 700px at 20% 110%, rgba(29,233,182,.06), transparent 60%),
              linear-gradient(180deg, var(--bg), var(--bg-deep));
  overflow-x:hidden;
}

/* Accessibility helpers */
.visually-hidden{position:absolute!important;height:1px;width:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);}

/* Header */
.site-header{
  position:sticky; top:0; z-index:10;
  background:linear-gradient(180deg, rgba(11,17,20,.9), rgba(11,17,20,.55));
  border-bottom:1px solid rgba(255,255,255,.06);
  backdrop-filter: blur(8px);
  padding:14px 18px;
}
.brand{display:flex;gap:16px;align-items:center}
.crest{
  width:58px;height:58px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%, #0d2b2b, #020405);
  position:relative;box-shadow:0 0 40px rgba(29,233,182,.25) inset, 0 8px 28px rgba(0,0,0,.5);
}
.crest-inner{
  position:absolute;inset:8px;border-radius:50%;
  background:conic-gradient(from 180deg, #1de9b6, #ffd57a, #4fc3f7, #1de9b6);
  filter:blur(8px);opacity:.25;
}
.brand-txt h1{margin:0;font-size:1.1rem;letter-spacing:.4px}
.motto{margin:.125rem 0 0;color:var(--muted);font-size:.9rem}
.rgb-cycle{font-weight:600}

/* Header actions */
.actions{display:flex;align-items:center;gap:12px;margin-top:10px;flex-wrap:wrap}
.search{
  flex:1;min-width:220px;
  background:var(--panel);border:1px solid rgba(255,255,255,.08);
  color:var(--text);padding:10px 12px;border-radius:12px;outline:none;
  box-shadow:var(--shadow);
}
.search::placeholder{color:#7aa0a8}
.btn{
  appearance:none;border:1px solid rgba(255,255,255,.14);
  background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  color:var(--text);padding:10px 14px;border-radius:12px;
  cursor:pointer;font-weight:600;letter-spacing:.3px;
}
.btn.ghost{border-color:rgba(255,255,255,.12)}

/* Layout */
.layout{
  display:grid;grid-template-columns: minmax(260px, 420px) 1fr;
  gap:22px;max-width:1200px;margin:24px auto;padding:0 16px;
}
@media (max-width: 900px){
  .layout{grid-template-columns: 1fr}
}

/* Orb panel */
.orb-panel{
  background:linear-gradient(180deg, rgba(18,26,29,.7), rgba(6,10,12,.6));
  border:1px solid rgba(255,255,255,.06);
  border-radius:20px;padding:18px;box-shadow:var(--shadow);
  position:relative;overflow:hidden;
}
.orb-wrap{position:relative;aspect-ratio:1/1;max-width:360px;margin:4px auto 12px}
.orb-glow{
  position:absolute;inset:10%;border-radius:50%;
  background: radial-gradient(closest-side, rgba(29,233,182,.35), transparent 70%);
  filter: blur(12px);
  animation: glowPulse 5s ease-in-out infinite;
}
@keyframes glowPulse{0%,100%{opacity:.5;transform:scale(1)}50%{opacity:.9;transform:scale(1.05)}}

.orb-core{
  position:absolute;inset:0;border-radius:50%;
  background: radial-gradient(circle at 35% 30%, #0fe, #09a 25%, #013 60%, #000 100%);
  box-shadow: inset 0 0 60px rgba(0,0,0,.8), 0 20px 80px rgba(0,0,0,.6);
}
.orbit-ring{
  position:absolute;inset:-6%;border-radius:50%;
  border:2px dashed rgba(255,255,255,.08);
  animation: ringSpin 18s linear infinite;
}
@keyframes ringSpin{to{transform:rotate(360deg)}}

.thought-bubble{
  position:absolute;left:50%;top:-10px;transform:translateX(-50%);
  max-width:90%;background: linear-gradient(180deg, rgba(10,20,22,.95), rgba(6,10,12,.92));
  border:1px solid rgba(255,255,255,.14);border-radius:18px;padding:12px 14px;
  color:var(--text);font-size:.95rem;line-height:1.5;box-shadow:var(--shadow);
  opacity:0;pointer-events:none;transition:opacity .35s, transform .35s;
}
.thought-bubble.show{opacity:1;transform:translateX(-50%) translateY(0)}
.orb-hint{color:var(--muted);text-align:center;font-size:.9rem}

/* FAQ panel */
.faq-panel{
  background:linear-gradient(180deg, rgba(18,26,29,.65), rgba(6,10,12,.58));
  border:1px solid rgba(255,255,255,.06);
  border-radius:20px;padding:16px;box-shadow:var(--shadow);
}
.faq-panel h2{margin:4px 10px 12px;font-size:1.25rem}

.faq{display:grid;gap:10px}
.faq-item{
  border:1px solid rgba(255,255,255,.1);
  border-radius:16px;overflow:hidden;background: linear-gradient(180deg, rgba(12,18,21,.9), rgba(8,12,14,.88));
}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 14px;cursor:pointer;font-weight:700;letter-spacing:.2px;
}
.faq-q .q-txt{flex:1}
.faq-q .chev{width:22px;height:22px;border-radius:6px;
  display:grid;place-items:center;border:1px solid rgba(255,255,255,.15);
}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .4s ease;
  background:linear-gradient(180deg, rgba(12,18,21,1), rgba(6,10,12,.92));
  border-top:1px solid rgba(255,255,255,.06);
}
.faq-a-inner{padding:12px 14px;color:#dbe7eb}
.faq-item.open .faq-a{max-height:420px}
.faq-item.open .chev{background:rgba(255,255,255,.06)}

/* Footer */
.site-footer{max-width:1200px;margin:16px auto 48px;padding:0 16px}
.footer-grid{
  display:flex;justify-content:space-between;gap:12px;
  color:var(--muted);font-size:.9rem;border-top:1px solid rgba(255,255,255,.08);
  padding-top:12px;
}
.footer-rgb span{color:var(--emerald)}

/* Particle canvas */
#particleCanvas{
  position:fixed;inset:0;z-index:-1;
}

/* Hover / focus */
.faq-item:focus-within .faq-q,
.faq-q:focus{outline:2px solid rgba(79,195,247,.35);outline-offset:2px;border-radius:12px}
.faq-q:hover{background:rgba(255,255,255,.03)}

/* Small tweaks */
.chev svg{display:block}