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spin{to{transform:rotate(360deg)}}.loading-center{display:flex;align-items:center;justify-content:center;padding:3rem}.alert{padding:.75rem 1rem;border-radius:var(--radius-sm);font-size:.85rem;margin-bottom:1rem}.alert-danger{background:var(--color-danger-soft);color:var(--color-danger);border:1px solid var(--color-danger-border)}.alert-success{background:var(--color-success-soft);color:var(--color-success);border:1px solid var(--color-success-border)}.card{background:var(--color-surface);border-radius:var(--radius-md);border:1px solid var(--color-border);box-shadow:var(--shadow-sm);padding:1.25rem}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}.grid{display:grid;gap:1rem}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.grid-cols-3{grid-template-columns:repeat(3,1fr)}.grid-cols-4{grid-template-columns:repeat(4,1fr)}@media (max-width: 900px){.grid-cols-3,.grid-cols-4{grid-template-columns:repeat(2,1fr)}}@media (max-width: 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