*{box-sizing:border-box;margin:0;padding:0}:root{--primary:#1e40af;--primary-light:#3b82f6;--primary-dark:#1e3a8a;--bg:#f8fafc;--bg-card:#fff;--text:#1e293b;--text-secondary:#64748b;--border:#e2e8f0;--success:#16a34a;--warning:#f59e0b;--danger:#ef4444;--radius:12px;--shadow:0 1px 3px #00000014;--shadow-lg:0 4px 12px #0000001a}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.app{flex-direction:column;min-height:100vh;display:flex}.header{background:var(--primary);color:#fff;z-index:100;align-items:center;gap:16px;height:56px;padding:0 20px;display:flex;position:sticky;top:0;box-shadow:0 2px 8px #1e40af4d}.back-to-main{color:#ffffffd9;white-space:nowrap;border-radius:8px;flex-shrink:0;padding:4px 8px;font-size:13px;font-weight:500;text-decoration:none;transition:background 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