:root{--hb-bg:#0f172a;--hb-user:#1f2937;--hb-accent:#16a34a;--hb-text:#e5e7eb}
.hb-launcher{position:fixed;right:18px;bottom:18px;z-index:9999;width:54px;height:54px;border-radius:999px;border:0;background:#111827;color:#fff;cursor:pointer;box-shadow:0 8px 24px rgba(0,0,0,.25);display:flex;align-items:center;justify-content:center;font-size:22px;transition:transform .15s,box-shadow .15s}
.hb-launcher:hover{transform:translateY(-1px);box-shadow:0 10px 28px rgba(0,0,0,.28)}
.hb-panel{position:fixed;right:18px;bottom:84px;z-index:9999;width:min(360px,92vw);height:480px;display:none;background:#0b1020;border:1px solid #1e293b;border-radius:16px;box-shadow:0 16px 40px rgba(0,0,0,.35);overflow:hidden;color:var(--hb-text);font-family:Outfit,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
.hb-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid #1e293b;background:#0f172a}
.hb-head .title{font-weight:800;font-size:16px}
.hb-head .actions{display:flex;gap:8px}
.hb-icon-btn{background:transparent;border:0;color:#94a3b8;cursor:pointer;font-size:18px}
.hb-icon-btn:hover{color:#cbd5e1}
.hb-body{height:calc(100% - 52px - 58px);padding:12px;overflow:auto;scroll-behavior:smooth}
.hb-msg{display:flex;margin:10px 0;gap:8px}
.hb-msg.bot .bubble{background:var(--hb-bg)}
.hb-msg.user{justify-content:flex-end}
.bubble{max-width:80%;padding:10px 12px;border-radius:12px;color:#e5e7eb;line-height:1.45;font-size:14px;white-space:pre-wrap}
.hb-quick{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.hb-chip{background:#111827;border:1px solid #1f2937;border-radius:999px;padding:6px 10px;font-size:12px;cursor:pointer}
.hb-chip:hover{background:#162033}
.hb-foot{display:flex;gap:8px;align-items:center;padding:10px;border-top:1px solid #1e293b;background:#0f172a}
.hb-input{flex:1;background:#0b1325;border:1px solid #1e293b;border-radius:12px;color:#e5e7eb;padding:10px 12px;font-size:14px}
.hb-send{background:var(--hb-accent);border:0;border-radius:12px;color:#fff;padding:10px 12px;font-weight:700;cursor:pointer}
.hb-send:hover{filter:brightness(1.04)}
.hb-links a{color:#93c5fd;text-decoration:underline}