* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Stejné pozadí jako u původní aplikace */
body {
    background: radial-gradient(circle at center, #2e1e3e 0%, #111122 100%);
    color: #cdd6f4;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 40px 20px;
}

.library-wrapper {
    max-width: 1100px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Záhlaví */
.library-header {
    text-align: center;
    margin-bottom: 50px;
}

.library-header h1 {
    color: #f5c2e7;
    font-size: 2.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: 10px;
}

.library-header p {
    color: #a6adc8;
    font-size: 1.1rem;
}

/* Mřížka s miniatury */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
    width: 100%;
}

/* Karta knihy */
.book-card {
    background-color: #161622;
    border: 1px solid #2a2b3d;
    border-radius: 12px;
    padding: 20px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    perspective: 1000px;
}

.book-card:hover {
    transform: translateY(-8px);
    border-color: #f5c2e7;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.book-card.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* 3D Miniatura Obálky */
.book-thumb {
    width: 160px;
    height: 240px;
    margin-bottom: 20px;
    perspective: 1000px;
}

.thumb-cover {
    width: 100%;
    height: 100%;
    background-color: #0f0f1a;
    border: 1px solid #3e3f5c;
    border-radius: 4px 8px 8px 4px;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.6), inset -3px 0 6px rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 15px;
    position: relative;
    transition: transform 0.4s ease;
    transform-origin: left center;
}

/* Simulace hřbetu knihy vlevo */
.thumb-cover::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 12px;
    height: 100%;
    background: rgba(255, 255, 255, 0.07);
    border-right: 1px solid rgba(0, 0, 0, 0.3);
    border-radius: 4px 0 0 4px;
}

.book-card:hover .thumb-cover {
    transform: rotateY(-15deg);
}

.thumb-title {
    color: #f5c2e7;
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 8px;
}

.thumb-subtitle {
    color: #6c7086;
    font-size: 0.8rem;
}

/* Informace pod miniaturou */
.book-info {
    text-align: center;
    width: 100%;
}

.book-info h2 {
    font-size: 1.2rem;
    color: #cdd6f4;
    margin-bottom: 8px;
}

.book-info p {
    font-size: 0.9rem;
    color: #a6adc8;
    line-height: 1.4;
}

/* Responsivita */
@media (max-width: 600px) {
    .library-header h1 {
        font-size: 1.8rem;
    }
    .books-grid {
        grid-template-columns: 1fr;
    }
}