main{flex:1;display:flex;flex-direction:column;padding:0}.panel-left{width:45%;border-right:1px solid var(--border);background:var(--bg2);display:flex;flex-direction:column;overflow-y:auto;padding:24px;gap:16px}.panel-right{flex:1;background:var(--bg);display:flex;flex-direction:column;padding:24px;overflow-y:auto;gap:16px}@media(max-width:900px){main{flex-direction:column}.panel-left{width:100%;border-right:none;border-bottom:1px solid var(--border);padding:16px}.panel-right{padding:16px}}.panel-header{font-size:14px;font-weight:600;color:#fff;padding-bottom:12px;border-bottom:1px solid var(--border);text-transform:uppercase;letter-spacing:.5px}.control-group{display:flex;flex-direction:column;gap:8px}.control-group label{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}textarea{background:var(--bg3);border:1px solid var(--border);color:#fff;padding:14px;border-radius:var(--r);outline:none;font-family:JetBrains Mono,monospace;font-size:12px;resize:vertical;transition:border-color .2s;line-height:1.5;width:100%;box-sizing:border-box}textarea:focus{border-color:var(--accent);box-shadow:0 0 8px #00a8ff40}textarea[readonly]{color:var(--accent)}select{background:var(--bg3);border:1px solid var(--border);color:#fff;padding:10px 12px;border-radius:var(--r);outline:none;font-size:13px;cursor:pointer}select:focus{border-color:var(--accent)}.btn-row{display:flex;gap:8px}.sig-tabs{display:flex;gap:4px}.sig-tab{font-size:11px;padding:4px 10px;cursor:pointer}.sig-tab.active{background:var(--accent-dim);color:var(--accent);border-color:var(--accent)}.loading{text-align:center;color:var(--muted);font-size:13px;padding:8px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:16px;color:var(--muted);text-align:center;padding:40px}.empty-icon{font-size:48px}.verify-result{padding:12px;border-radius:var(--r);text-align:center;font-weight:600}.verify-result.valid{background:#2ea0431a;border:1px solid var(--success);color:var(--success)}.verify-result.invalid{background:#f851491a;border:1px solid var(--error);color:var(--error)}