:root{--bg: #f7f8fa;--bg-elev: #ffffff;--border: #e5e7eb;--border-strong: #d1d5db;--text: #111827;--text-muted: #6b7280;--text-dim: #9ca3af;--primary: #4f46e5;--primary-hover: #4338ca;--primary-soft: #eef2ff;--success: #059669;--success-soft: #d1fae5;--danger: #dc2626;--danger-soft: #fee2e2;--warning: #d97706;--warning-soft: #fef3c7;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .04);--shadow-md: 0 4px 12px rgba(15, 23, 42, .06)}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Inter,Segoe UI,system-ui,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5;min-height:100vh}button{cursor:pointer;font-family:inherit}input,textarea,select{font:inherit;color:var(--text)}code{font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:12px}h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.01em}a{color:var(--primary);text-decoration:none}.btn{background:var(--primary);color:#fff;border:0;padding:9px 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