:root{--primary:#2563eb;--primary-hover:#1d4ed8;--danger:#dc2626;--danger-hover:#b91c1c;--success:#16a34a;--warning:#f59e0b;--gray-50:#f9fafb;--gray-100:#f3f4f6;--gray-200:#e5e7eb;--gray-300:#d1d5db;--gray-500:#6b7280;--gray-700:#374151;--gray-900:#111827;--radius:8px;--shadow:0 1px 3px #0000001a}*{box-sizing:border-box;margin:0;padding:0}body{color:var(--gray-900);background:var(--gray-50);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6}.card{border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;margin-bottom:16px;padding:24px}.btn{border-radius:var(--radius);cursor:pointer;border:none;justify-content:center;align-items:center;padding:8px 16px;font-size:14px;font-weight:500;transition:background 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