:root { --bg:#000; --text:#e8eef6; --line:#2a2a2a; --pill:#171717; --accent:#cfd6df; }
*{box-sizing:border-box} html,body{height:100%}
body{margin:0; font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif; background:var(--bg); color:var(--text);}

.top-header{padding:16px 0}
.logo-top{display:block; margin:0 auto; width:min(160px,40vw); height:auto}

.hero{position:relative; min-height:92vh; display:grid; place-items:center; gap:14px; padding:56px 16px; text-align:center}
.hero::before{
  content:""; position:absolute; inset:0; z-index:0; opacity:.22;
  background:url("assets/brain_logo.png") center 18% / min(140vh,1200px) no-repeat;
}
.hero>*{position:relative; z-index:1}
.hero h1{font-size:clamp(28px,6.6vw,44px); margin:0}
.hero p{opacity:.92; margin:0 0 10px}
.pill-nav{display:flex; flex-wrap:wrap; gap:12px; justify-content:center}
.pill-nav a{display:inline-block; padding:10px 16px; border-radius:999px; background:var(--pill); color:var(--text); text-decoration:none; border:1px solid var(--line)}

section{padding:24px 16px}

/* Bubbla + panel */
.iax-root{position:fixed; right:16px; bottom:20px; z-index:9999}
.iax-bubble.iax-mini{
  width:64px; height:64px; border-radius:50%;
  background:url("assets/brain_logo.png") center/contain no-repeat transparent;
  border:0; box-shadow:0 10px 28px rgba(0,0,0,.45); cursor:pointer;
}
.iax-bubble.iax-mini:active{transform:scale(.98)}
.iax-panel{
  position:fixed; right:16px; bottom:96px; width:min(92vw,380px); max-height:min(70vh,620px);
  background:rgba(16,22,30,.92); border:1px solid rgba(255,255,255,.12);
  border-radius:14px; box-shadow:0 12px 36px rgba(0,0,0,.5);
}
[hidden].iax-panel{display:none}
.iax-head{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-bottom:1px solid rgba(255,255,255,.1)}
.iax-close{background:transparent;border:0;color:var(--text);font-size:20px;cursor:pointer}
.iax-log{padding:10px 12px;max-height:48vh;overflow:auto}
.iax-msg{margin:6px 0;padding:8px 10px;border-radius:12px;max-width:92%}
.iax-msg.user{background:rgba(255,255,255,.10);align-self:flex-end}
.iax-msg.bot{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.10)}
.iax-form{display:flex;gap:8px;padding:10px 12px;border-top:1px solid rgba(255,255,255,.1)}
.iax-input{flex:1;padding:10px;border-radius:10px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);color:var(--text)}
.iax-send{padding:10px 14px;border-radius:10px;border:1px solid transparent;background:var(--accent);color:#0b1520;font-weight:600;cursor:pointer}