:root{--bg: #f5f6f8;--card: #ffffff;--border: #e3e5e9;--text: #1c2128;--muted: #6b7280;--accent: #4f46e5;--accent-hover: #4338ca;--success: #15803d;--error: #b91c1c;--code-bg: #f1f3f5}@media (prefers-color-scheme: dark){:root{--bg: #12141a;--card: #1b1e26;--border: #2c303b;--text: #e6e8ec;--muted: #9aa1ad;--accent: #818cf8;--accent-hover: #a5b4fc;--success: #4ade80;--error: #f87171;--code-bg: #262a34}}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.app{max-width:1400px;margin:0 auto;padding:24px}.topbar{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;margin-bottom:20px}h1{margin:0;font-size:22px}.subtitle{margin:2px 0 0;color:var(--muted);font-size:13px}h2{margin:0 0 12px;font-size:16px}h4{margin:12px 0 4px;font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}.status-pills{display:flex;gap:8px}.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;border:1px solid var(--border);background:var(--card)}.pill .dot{width:8px;height:8px;border-radius:50%}.pill-up .dot{background:var(--success)}.pill-down{opacity:.7}.pill-down .dot{background:var(--error)}.columns{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}@media (max-width: 1000px){.columns{grid-template-columns:1fr}}.column{display:flex;flex-direction:column;gap:20px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:18px}.card-header{display:flex;justify-content:space-between;align-items:center}details.card summary{cursor:pointer;font-weight:600;font-size:16px}details.card[open] summary{margin-bottom:12px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}@media (max-width: 600px){.form-grid{grid-template-columns:1fr}}label{display:flex;flex-direction:column;gap:4px;font-size:13px;font-weight:500}input,select,textarea{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:8px 10px}input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:-1px}textarea.payload{font-family:ui-monospace,Cascadia Code,Consolas,monospace;font-size:12.5px;resize:vertical;width:100%}textarea.payload.invalid{border-color:var(--error)}.payload-label{margin-bottom:8px}.error-text{color:var(--error);font-size:12.5px;margin:4px 0}.placeholder-help{margin:8px 0 12px;font-size:12.5px}.placeholder-help summary{cursor:pointer;color:var(--muted)}.placeholder-help table{margin-top:6px;border-collapse:collapse}.placeholder-help td{padding:2px 12px 2px 0;vertical-align:top}code{background:var(--code-bg);border-radius:4px;padding:1px 5px;font-size:12px;font-family:ui-monospace,Cascadia Code,Consolas,monospace}button{font:inherit;font-weight:600;border-radius:8px;padding:8px 14px;cursor:pointer;border:1px solid transparent}button:disabled{opacity:.55;cursor:wait}button.primary{background:var(--accent);color:#fff;border:none}button.primary:hover:not(:disabled){background:var(--accent-hover)}button.ghost{background:transparent;color:var(--accent);border:1px solid var(--border)}button.ghost:hover{border-color:var(--accent)}.action-box{border:1px solid var(--border);border-radius:10px;padding:12px;margin-top:12px}.action-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.action-title{font-weight:600;font-size:13.5px;margin-right:auto}.custom-target{width:100%;margin-top:8px}.hint{color:var(--muted);font-size:12.5px;margin:8px 0 0}.muted{color:var(--muted);font-weight:400}.small{font-size:12px;margin:2px 0 0}.preview-row{margin-top:8px}.preview,.inbox-detail pre{background:var(--code-bg);border-radius:8px;padding:10px;font-size:12px;overflow-x:auto;font-family:ui-monospace,Cascadia Code,Consolas,monospace;margin:8px 0 0;white-space:pre-wrap;word-break:break-word}.scenario-list{list-style:none;margin:12px 0 0;padding:0}.scenario-list li{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 0;border-top:1px solid var(--border)}.inbox,.log{list-style:none;margin:8px 0 0;padding:0}.inbox li{border-top:1px solid var(--border)}.inbox-row{display:flex;width:100%;align-items:center;gap:10px;padding:8px 4px;background:none;border:none;text-align:left;font-weight:400;color:var(--text)}.inbox-row:hover{background:var(--code-bg)}.badge{color:#fff;font-size:10.5px;font-weight:700;padding:2px 8px;border-radius:999px;text-transform:uppercase;letter-spacing:.04em}.mono{font-family:ui-monospace,Cascadia Code,Consolas,monospace;font-size:12px;margin-right:auto;overflow:hidden;text-overflow:ellipsis}.inbox-detail{padding:0 4px 12px}.log li{font-size:12.5px;padding:5px 0;border-top:1px solid var(--border)}.log-error{color:var(--error)}.log-success{color:var(--success)}.empty{color:var(--muted);font-size:13px;text-align:center;padding:18px 0}