.gas-estimate-op-stack-card{display:grid;gap:16px;padding:16px;border:1px solid var(--border);border-radius:8px;background:var(--surface)}.gas-estimate-op-stack-picker{display:flex;gap:8px}.gas-estimate-op-stack-picker-button{padding:8px 12px;border:1px solid var(--border);border-radius:4px;background:var(--surface);font-family:monospace;font-size:14px;cursor:pointer}.gas-estimate-op-stack-picker-button.is-active{border:2px solid var(--text);background:var(--surface-strong)}.gas-estimate-op-stack-knob-row{display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px}.gas-estimate-op-stack-mono{font-family:monospace;font-size:14px}.gas-estimate-op-stack-input{width:80px;padding:6px 8px;border:1px solid var(--border);border-radius:4px;font-family:monospace;font-size:14px}.gas-estimate-op-stack-result-row{display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px;padding:10px 0;border-top:1px solid var(--border)}.gas-estimate-op-stack-result-value{font-family:monospace;font-size:13px;color:var(--text-muted)}.gas-estimate-op-stack-error{color:var(--danger);font-family:monospace;font-size:13px}