:root{--tb-bg:#f6f8fb;--tb-card:#fff;--tb-blue:#0b4f7a;--tb-blue2:#0b3f63;--tb-text:#1f2a37;--tb-muted:#6b7280;--tb-border:rgba(15,23,42,.10)}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial; background:transparent}

.tb-chat{height:100%;display:flex;flex-direction:column;background:var(--tb-bg)}
.tb-header{display:flex;align-items:center;gap:10px;padding:12px 14px;background:linear-gradient(180deg,var(--tb-blue),var(--tb-blue2));color:#fff}
.tb-badge{width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.14);display:flex;align-items:center;justify-content:center;font-weight:700}
.tb-title{flex:1;min-width:0}
.tb-title-main{font-weight:700;line-height:1.1}
.tb-title-sub{font-size:12px;opacity:.9}
.tb-actions{display:flex;align-items:center;gap:8px}
.tb-wa{background:#25D366;color:#083b20;text-decoration:none;padding:7px 10px;border-radius:999px;font-weight:700;font-size:12px}
.tb-btn{width:32px;height:32px;border-radius:10px;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.08);color:#fff;font-size:18px;line-height:1;cursor:pointer}

.tb-body{flex:1;overflow:auto;padding:14px}
.tb-msg{display:flex;margin:10px 0}
.tb-msg-bot{justify-content:flex-start}
.tb-msg-user{justify-content:flex-end}
.tb-bubble{max-width:82%;padding:10px 12px;border-radius:14px;border:1px solid var(--tb-border);background:var(--tb-card);color:var(--tb-text);font-size:14px;line-height:1.35;white-space:pre-wrap}
.tb-msg-user .tb-bubble{background:#e8f1ff;border-color:rgba(59,130,246,.25)}

.tb-quick{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tb-pill{border:1px solid var(--tb-border);background:#fff;padding:8px 10px;border-radius:999px;cursor:pointer;font-size:13px}

.tb-footer{display:flex;gap:10px;padding:12px 14px;background:rgba(255,255,255,.9);border-top:1px solid var(--tb-border)}
.tb-input{flex:1;border:1px solid var(--tb-border);border-radius:14px;padding:12px 12px;font-size:14px;outline:none}
.tb-input:focus{border-color:rgba(11,79,122,.45)}
.tb-send{border:0;border-radius:14px;background:var(--tb-blue);color:#fff;padding:0 18px;font-weight:700;cursor:pointer}