.node-backdrop{ position:fixed; inset:0; background:rgba(2,2,4,.75); display:none; z-index:400; }
.node-backdrop.show{ display:block; }

.stepup-modal-backdrop{ position:fixed; inset:0; background:rgba(2,2,4,.8); display:none; align-items:center; justify-content:center; z-index:500; }
.stepup-modal-backdrop.show{ display:flex; }
.stepup-modal{ background:var(--bg-card, #12161f); border:1px solid var(--border-color, rgba(255,255,255,.15)); border-radius:12px; padding:20px; width:300px; max-width:88vw; box-shadow:0 20px 60px rgba(0,0,0,.5); }
.stepup-modal h4{ margin:0 0 6px; font-size:14px; color:var(--text-primary,#e1e7ec); }
.stepup-modal-note{ font-size:11.5px; color:#999; margin:0 0 12px; line-height:1.4; }
.stepup-modal input[type=password]{ width:100%; background:#0e121a; border:1px solid rgba(255,255,255,.15); border-radius:6px; color:#fff; padding:8px 10px; font-size:13px; }
.stepup-modal #stepup-modal-error{ color:var(--danger-color,#EF4444); font-size:11px; min-height:14px; margin:6px 0 0; }
.stepup-modal-actions{ display:flex; gap:8px; margin-top:14px; }
.stepup-modal-actions button{ width:auto !important; flex:1; }