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h1{font-size:2rem}.admin-actions{flex-direction:row;max-width:300px;width:auto}.admin-tabs{flex-direction:row;flex-wrap:wrap;justify-content:center}.tab-button{flex:1 1;max-width:200px;min-width:140px}.card{padding:2rem}}@media (min-width:1024px){.container{padding:2rem}.admin-header h1{font-size:2.25rem}.admin-tabs{flex-wrap:nowrap}}.books-management{width:100%}.page-header{-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);background:#ffffffe6;border-radius:20px;box-shadow:0 8px 32px #1f268733;margin-bottom:0;padding:.5rem}.page-header h2{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,#0077be,#003f7f);-webkit-background-clip:text;background-clip:text;color:#2d3748;font-size:1.8rem;font-weight:700;margin:0 0 .5rem}.page-description{color:#718096;font-size:1rem;line-height:1.5;margin:0}.books-grid{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:1fr}.book-header{border-bottom:2px solid #f7fafc}.book-header 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#0000001a;transform:translateY(2px)}.btn-download{background:linear-gradient(135deg,#58cc02,#3aba00)}.btn-verify{background:linear-gradient(135deg,#1cb0f6,#0d8bd7)}.btn-qr{background:linear-gradient(135deg,#ce82ff,#b066d8)}.verification-section{background:#fff;border-radius:20px;box-shadow:0 4px 8px #0000001a,0 1px 3px #0000000f;margin-bottom:2rem;padding:2rem}.verify-title{align-items:center;color:#333;display:flex;font-size:1.5rem;font-weight:800;gap:.5rem;margin-bottom:.5rem}.verify-icon{font-size:1.8rem}.verify-subtitle{color:#666;font-size:.95rem;margin-bottom:1.5rem}.verify-link-box{align-items:center;background:linear-gradient(135deg,#f5f7fa,#e8edf3);border:2px solid var(--duo-blue);border-radius:12px;display:flex;flex-wrap:wrap;gap:1rem;padding:1rem}.verify-link-box code{color:#333;flex:1 1;font-family:Courier 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