:root{--bg: #f4f6fa;--bg-panel: #ffffff;--bg-soft: #f7f9fc;--fg: #1e2530;--fg-muted: #6b7280;--fg-faint: #9ca3af;--border: #e5e7eb;--border-strong: #d1d5db;--brand: #2563eb;--brand-hover: #1d4ed8;--brand-soft: #dbeafe;--danger: #dc2626;--danger-soft: #fee2e2;--warning: #d97706;--warning-soft: #fef3c7;--success: #16a34a;--success-soft: #dcfce7;--shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 10px rgba(16, 24, 40, .06);--radius: 10px;--radius-sm: 6px;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0;font-family:var(--font-sans);font-size:14px;background:var(--bg);color:var(--fg);line-height:1.4}a{color:var(--brand);text-decoration:none}a:hover{color:var(--brand-hover);text-decoration:underline}h1,h2,h3{margin:0 0 16px;font-weight:600;line-height:1.2}.page__title{font-size:22px;margin-bottom:20px}.app{display:grid;grid-template-columns:240px 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