:root{--bg: #f3f4f6;--surface: #ffffff;--border: #e5e7eb;--border-strong: #8a94a6;--ink: #111827;--ink-muted: #586174;--primary: #1b5fd1;--on-primary: #ffffff;--primary-soft: #e8f0fd;--success: #157347;--warning: #9a5b00;--danger: #b42318;--on-danger: #ffffff;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-6: 24px;--space-8: 32px;--control-h: 48px;--radius: 12px;--radius-lg: 16px;--font-sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;--text: var(--ink);--muted: var(--ink-muted);--accent: var(--primary);--accent-text: var(--on-primary);--ok: var(--success);--warn: var(--warning);--danger-bg: #fef3f2;--ok-bg: #ecfdf3;--warn-bg: #fff8eb;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 var(--font-sans)}button,input,select{font:inherit}.app{min-height:100vh;display:flex;flex-direction:column}.topbar{display:grid;grid-template-columns:1fr auto 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