.bt-mode{display:inline-flex;border:1px solid rgba(255,255,255,.15);border-radius:999px;padding:3px;background:rgba(255,255,255,.04);margin:0 auto 1.25rem}.bt-mode button{border:none;background:transparent;color:var(--text-secondary);font-weight:700;font-size:.85rem;padding:.45rem 1.1rem;border-radius:999px;cursor:pointer;transition:background .15s ease,color .15s ease}.bt-mode button.active{background:var(--accent);color:#1a1a1a}.bt-mode-wrap{text-align:center}.bt-inputs{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin-bottom:1.5rem}.bt-field{display:flex;flex-direction:column;gap:.4rem}.bt-field label{font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--text-secondary);font-weight:700}.bt-field input{width:100%;padding:.55rem .7rem;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.15);border-radius:8px;color:var(--text-primary);font-size:.95rem}.bt-field input:focus{outline:none;border-color:var(--accent)}.bt-field input.bt-invalid{border-color:#e57373}.bt-hint{color:var(--text-secondary)}.bt-error,.bt-hint{font-size:.72rem;line-height:1.4}.bt-error{color:#e57373}