*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,sans-serif;background:#ececec;color:#111}.bb-root{min-height:100vh;padding:16px 16px 24px;display:flex;flex-direction:column}.bb-top{display:flex;justify-content:flex-end;gap:10px}.bb-chip{border:1px solid #ddd;background:#fff;border-radius:12px;padding:10px 16px;font-weight:600;box-shadow:0 2px 6px rgba(0,0,0,.06);transition:.18s ease}.bb-chip:hover{transform:translateY(-1px);box-shadow:0 6px 14px rgba(0,0,0,.1)}.bb-center{flex:1 1;justify-content:center;flex-direction:column;gap:10px;min-height:260px}.bb-center,.bb-logo-wrap{display:flex;align-items:center}.bb-logo-wrap{gap:16px;animation:fadeIn .35s ease}.bb-logo{width:56px;height:56px;background:#111;position:relative;animation:pulse 2.2s ease-in-out infinite}.bb-logo,.bb-logo:after{-webkit-clip-path:polygon(25% 7%,75% 7%,100% 50%,75% 93%,25% 93%,0 50%);clip-path:polygon(25% 7%,75% 7%,100% 50%,75% 93%,25% 93%,0 50%)}.bb-logo:after{content:"";position:absolute;inset:10px;background:#ececec}.bb-center h1{margin:0;font-size:48px;letter-spacing:.5px}.bb-composer-wrap{display:flex;justify-content:center}.bb-composer-card{width:min(920px,100%);background:#f5f5f5;border:1px solid #d6d6d6;border-radius:26px;overflow:hidden;box-shadow:0 8px 24px rgba(0,0,0,.08);animation:fadeUp .35s ease}.bb-composer-card textarea{width:100%;height:130px;border:none;background:transparent;padding:22px;font-size:34px;resize:none;outline:none;color:#333}.bb-actions{display:flex;align-items:center;padding:0 16px 14px}.ghost{border:none;background:transparent;font-size:28px;padding:8px 10px}.ghost,.send{cursor:pointer}.send{width:52px;height:52px;border-radius:999px;border:none;background:#6b7280;color:#fff;font-size:26px}.bb-footer{border-top:1px solid #ddd;padding:12px 14px;display:flex;justify-content:space-between;align-items:center}.bb-pill{border:1px solid #d0d0d0;background:#fff;border-radius:14px;padding:10px 14px;font-size:26px}.bb-link{background:transparent;border:none;font-size:26px;cursor:pointer}.bb-output-wrap{display:flex;justify-content:center;margin-top:14px}.bb-output{width:min(920px,100%);min-height:120px;max-height:260px;overflow:auto;background:#fff;border:1px solid #d9d9d9;border-radius:14px;padding:12px;white-space:pre-wrap}.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.35);display:flex;align-items:center;justify-content:center;padding:14px;z-index:30;animation:fadeIn .16s ease}.modal{width:min(760px,100%);max-height:88vh;overflow:auto;background:#fff;border-radius:18px;padding:18px;border:1px solid #e4e4e4;animation:scaleIn .2s ease}.modal.small{width:min(520px,100%)}.modal-head{display:flex;justify-content:space-between;align-items:center}.modal-head h3{margin:0;font-size:28px}.modal-head button{border:none;background:transparent;font-size:28px;cursor:pointer}.modal-sub{color:#666;font-size:22px;line-height:1.5}.agent-list{display:grid;grid-gap:10px;gap:10px;margin:12px 0}.agent-row{display:grid;grid-template-columns:34px 1fr auto;grid-gap:12px;gap:12px;align-items:center;border:1px solid #eee;border-radius:12px;padding:12px}.agent-row input{width:22px;height:22px}.agent-name{font-size:28px;font-weight:600}.agent-name small{font-size:18px;color:#888;margin-left:8px}.agent-model{font-size:20px;color:#666}.modal-foot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #eee;padding-top:12px;font-size:20px}.bb-dark{border:none;background:#111;color:#fff;border-radius:12px;padding:10px 16px;cursor:pointer}.bb-dark.block{display:inline-block;text-decoration:none;text-align:center}input{width:100%;padding:10px;border:1px solid #ddd;border-radius:10px}button,input{font-size:18px}.toast{position:fixed;top:14px;right:14px;background:#111;color:#fff;padding:10px 12px;border-radius:10px;z-index:50}@media (max-width:900px){.bb-center h1{font-size:34px}.bb-composer-card textarea{height:110px;font-size:22px}.bb-link,.bb-pill{font-size:18px}.modal-head h3{font-size:22px}.modal-sub{font-size:16px}.agent-name{font-size:20px}.agent-model,.modal-foot{font-size:14px}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.04)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}