.compact-card {
    border-radius: 10px;
    overflow: visible;
    background-color: #fff;
    border: 1px solid #e0e0e0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    opacity: 0;
    transform: translateY(15px);
    position: relative;
    transform-origin: center;
}
.compact-card.visible {
    opacity: 1;
    transform: translateY(0);
}
.compact-card:hover {
    transform: scale(1.1);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    z-index: 10;
}

.card-img-top {
    object-fit: cover;
    width: 100%;
    max-height: 200px;
}

.compact-body {
    padding: 8px 10px;
}
.compact-body .card-title {
    font-size: 0.95rem;
    margin-bottom: 4px;
}
.compact-body .card-text {
    font-size: 0.8rem;
    margin-bottom: 3px;
}

.card-link {
    text-decoration: none;
    color: inherit;
}

.book-card-badge {
    position: absolute;
    top: 6px;
    left: 6px;
    background-color: rgba(50, 205, 50, 0.9);
    color: #fff;
    font-weight: 600;
    font-size: 0.75rem;
    padding: 2px 5px;
    border-radius: 6px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    z-index: 20;
    cursor: default;
    transition: transform 0.2s ease;
}
.book-card-badge:hover {
    transform: scale(1.05);
}

.book-card-badge[data-age="16+"] { background-color: rgba(255, 140, 0, 0.9); }
.book-card-badge[data-age="18+"] { background-color: rgba(220, 20, 60, 0.9); }
.book-card-badge[data-age="16+"] .age-tooltip { background-color: rgba(255, 140, 0, 0.9); }
.book-card-badge[data-age="18+"] .age-tooltip { background-color: rgba(220, 20, 60, 0.9); }

.age-tooltip {
    background-color: rgba(50, 205, 50, 0.9);;
    position: absolute;
    left: 50%;
    top: 115%;
    transform: translateX(-50%) translateY(8px);
    color: #fff;
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 500;
    text-align: left;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    width: max-content;
    max-width: 220px;
    z-index: 9999;
    line-height: 1.3;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.book-card-badge:hover .age-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(3px);
    pointer-events: auto;
}

.age-tooltip::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 5px;
    border-style: solid;
    border-color: transparent transparent rgba(50, 205, 50, 0.95) transparent;
}
.book-card-badge[data-age="16+"] .age-tooltip::after { border-color: transparent transparent rgba(255, 140, 0, 0.95) transparent; }
.book-card-badge[data-age="18+"] .age-tooltip::after { border-color: transparent transparent rgba(220, 20, 60, 0.95) transparent; }

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}
.container, .row, .compact-card {
    animation: fadeInUp 0.5s ease forwards;
}