:root{--bg: #f5f6f8;--surface: #ffffff;--border: #e3e7ec;--text: #1d2433;--text-muted: #667085;--primary: #3355d8;--primary-hover: #2743b0;--primary-soft: #eaefff;--success: #17845a;--success-soft: #e7f6ef;--danger: #c1372d;--danger-soft: #fbeae9;--warning: #b7791f;--warning-soft: #fdf3df;--info: #2563c7;--info-soft: #e8f0fe;--neutral-soft: #eef0f3;--radius: 10px;--font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased}button,input,textarea{font-family:inherit}.app-shell{display:flex;min-height:100vh}.sidebar{width:232px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:20px 14px}.sidebar-brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:15px;padding:8px 10px 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40px;max-width:1100px}.page-header{margin-bottom:24px}.page-header-row{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.header-actions{display:flex;gap:10px;flex-shrink:0}.csv-hint{font-size:12.5px;color:var(--text-muted);margin:-12px 0 18px}.csv-hint code{background:var(--neutral-soft);padding:1px 6px;border-radius:4px;font-size:12px}.page-header h1{font-size:1.5rem;font-weight:600;margin:0 0 4px}.page-subtitle{color:var(--text-muted);font-size:14px;margin:0}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:28px}@media (max-width: 900px){.stat-grid{grid-template-columns:repeat(2,1fr)}}.stat-card{background:var(--surface);border:1px solid 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