body{margin:0;padding:0}.main-nav{background-color:#1e3a8a;color:#fff;padding:1rem 1.5rem;display:flex;justify-content:space-between;align-items:center;font-family:Arial,sans-serif}.logo{font-size:1.25rem;font-weight:700}.nav-links{display:flex;align-items:center;gap:1.5rem}.nav-link{color:#fff;text-decoration:none;font-size:1rem;transition:border-bottom .2s ease}.nav-link:hover{border-bottom:2px solid white}.logout-BTN{background-color:#e63946;color:#fff;padding:10px 20px;border:none;border-radius:6px;font-size:16px;font-weight:500;cursor:pointer;transition:background-color .3s ease,transform .2s ease}.logout-BTN:hover{background-color:#d62839;transform:translateY(-2px)}.edit{background-color:green;color:#fff;padding:10px 20px;border:none;border-radius:6px;font-size:16px;font-weight:500;cursor:pointer;transition:background-color .3s ease,transform .2s ease}.edit:hover{background-color:#015c01;transform:translateY(-2px)}.user-email{margin-left:1rem;font-size:.875rem;color:#e5e7eb}.book-card{background-color:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:1rem;width:250px;box-shadow:0 2px 8px #0000000d;text-align:center;transition:transform .2s ease}.book-card:hover{transform:translateY(-4px)}.book-image{width:100%;height:auto;border-radius:8px;object-fit:cover;margin-bottom:1rem}.book-title{font-size:1.1rem;font-weight:700;margin-bottom:.25rem;color:#111827}.book-author{font-size:.95rem;color:#6b7280;margin-bottom:.75rem}.read-button{padding:.5rem 1rem;background-color:#2563eb;color:#fff;border:none;border-radius:8px;font-size:.9rem;cursor:pointer;transition:background-color .2s ease}.read-button:hover{background-color:#1d4ed8}.books-page{padding:2rem;background-color:#f9fafb;min-height:100vh}.page-heading{font-size:1.8rem;font-weight:700;color:#1f2937;margin-bottom:1.5rem;text-align:center}.book-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem}.auth-container{max-width:400px;margin:5rem auto;padding:2rem;background-color:#fff;border:1px solid #e5e7eb;border-radius:12px;box-shadow:0 2px 12px #0000000f}.auth-heading{font-size:1.5rem;font-weight:700;margin-bottom:1.5rem;text-align:center;color:#1f2937}.auth-form{display:flex;flex-direction:column}.auth-form label{margin-bottom:.25rem;font-weight:500;color:#374151}.auth-form input{margin-bottom:1rem;padding:.5rem;font-size:1rem;border:1px solid #d1d5db;border-radius:8px}.auth-error{display:none;color:#dc2626;font-size:.875rem;margin-bottom:1rem;text-align:center}.auth-form button{padding:.75rem;background-color:#2563eb;color:#fff;border:none;border-radius:8px;font-size:1rem;cursor:pointer}.auth-form button:hover{background-color:#1d4ed8}.auth-switch{text-align:center;margin-top:1rem;font-size:.9rem}