:root{--color-primary: #0073bb;--color-primary-hover: #005a92;--color-danger: #d13212;--color-danger-hover: #a82810;--color-success: #1d8102;--color-bg: #f9fafb;--color-surface: #ffffff;--color-border: #e1e4e8;--color-text: #16191f;--color-text-muted: #687078;--radius: 6px;--shadow: 0 1px 3px rgba(0, 0, 0, .1)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.5}.app{max-width:960px;margin:0 auto;padding:2rem 1.5rem}.app-header{margin-bottom:2rem}.app-header h1{margin:0 0 .25rem;font-size:1.75rem}.subtitle{margin:0;color:var(--color-text-muted)}.tabs{display:flex;gap:0;border-bottom:2px solid var(--color-border);margin-bottom:1.5rem}.tabs button{padding:.75rem 1.25rem;background:none;border:none;border-bottom:2px solid transparent;margin-bottom:-2px;cursor:pointer;font-size:.95rem;color:var(--color-text-muted);transition:color .15s,border-color .15s}.tabs 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a:hover{text-decoration:underline}.status-result{margin-top:1rem;padding:1rem;border-radius:var(--radius);border:1px solid var(--color-border)}.status-ok{border-color:var(--color-success);background:#f0fdf4}.status-none{border-color:var(--color-text-muted);background:#f9fafb}.status-result dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:.25rem 1rem}.status-result dt{font-weight:600;font-size:.875rem}.status-result dd{margin:0}.webhook-url{font-family:monospace;font-size:.85rem;word-break:break-all}.error-banner{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;background:#fef2f0;border:1px solid var(--color-danger);border-radius:var(--radius);margin-bottom:1rem;color:var(--color-danger)}.error-banner button{background:none;border:none;font-size:1.2rem;color:var(--color-danger);cursor:pointer;padding:0 .5rem}.empty-state{text-align:center;padding:3rem 1rem;background:var(--color-surface);border-radius:var(--radius);box-shadow:var(--shadow);color:var(--color-text-muted)}.settings{background:var(--color-surface);padding:1.5rem;border-radius:var(--radius);box-shadow:var(--shadow)}.settings h2{margin-top:0;font-size:1.25rem}.settings code{background:#f0f0f0;padding:.1em .4em;border-radius:3px;font-size:.85em}.success-banner{padding:.75rem 1rem;background:#f0fef2;border:1px solid #4caf50;border-radius:6px;color:#2e7d32;margin-bottom:1rem}.webhook-guide{max-width:700px}.webhook-guide h2{margin-bottom:1.5rem}.webhook-guide h3{margin-top:1.5rem;margin-bottom:.5rem;color:var(--color-primary, #1976d2)}.webhook-guide ol,.webhook-guide ul{padding-left:1.5rem;line-height:1.8}.webhook-guide code{background:#f5f5f5;padding:.2rem .4rem;border-radius:3px;font-size:.85rem}.webhook-example{display:block;margin:.5rem 0;padding:.5rem;word-break:break-all}.webhook-guide a{color:var(--color-primary, 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