.trb-wrap{max-width:560px;margin:20px auto;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}
.trb-card{padding:20px;border-radius:16px;background:#f8fbff;border:1px solid rgba(37,99,235,.18);color:#000}
.trb-title{margin:0 0 14px;font-size:20px;font-weight:800;color:#000}
.trb-row{margin-bottom:12px}
.trb-label{display:block;font-size:13px;font-weight:700;margin-bottom:6px;color:#000}
.trb-input{width:100%;padding:12px;border-radius:12px;border:1px solid #c7d2fe;background:#fff;color:#000;outline:none}
.trb-input:focus{border-color:#2563eb;box-shadow:0 0 0 4px rgba(37,99,235,.15)}
.trb-btn{width:100%;padding:12px;border-radius:12px;border:0;background:#2563eb;color:#fff;font-weight:800;font-size:15px;cursor:pointer}
.trb-btn:disabled{opacity:.65;cursor:not-allowed}
.trb-result{margin-top:16px;font-size:22px;font-weight:900;color:#000;text-align:center;min-height:28px}
.trb-note{margin-top:8px;font-size:12px;color:#000;text-align:center;opacity:.7}