:root{--bg:#f6f8fb;--surface:#fff;--surface-muted:#eef2f6;--border:#d9e0e7;--text:#172033;--muted:#667085;--accent:#0f766e;--accent-strong:#0b5f59;--warning:#b7791f;--danger:#b42318;--info:#2563eb}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.app-shell{grid-template-columns:248px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{border-right:1px solid var(--border);background:var(--surface);padding:24px 18px}.brand{flex-direction:column;gap:4px;margin-bottom:28px;display:flex}.brand-title{font-size:18px;font-weight:750}.brand-subtitle{color:var(--muted);font-size:13px}.nav-list{gap:6px;display:grid}.nav-link{color:var(--muted);border-radius:8px;padding:10px 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var(--border);border-radius:8px;min-height:42px;padding:10px 12px}.field textarea{border:1px solid var(--border);resize:vertical;border-radius:8px;width:100%;min-height:140px;padding:10px 12px}.field-hint{color:var(--muted);margin:0;font-size:13px}.checkbox-field{border:1px solid var(--border);border-radius:8px;align-items:center;gap:10px;min-height:42px;padding:0 12px;display:flex}.checkbox-field input{margin:0}.integration-box{background:var(--surface-muted);border:1px solid var(--border);border-radius:8px;gap:14px;padding:14px;display:grid}.inline-field{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;display:grid}.inline-field input{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace}.button-row{flex-wrap:wrap;gap:10px;display:flex}.primary-button{background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:8px;min-height:42px;padding:10px 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