.prs-loading {
    max-width: 640px;
    margin: 0 auto;
}

.prs-section {
    margin-bottom: 2rem;
}

.prs-section-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
}

.prs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.prs-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--color-bg-elevated-bright);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    color: inherit;
}

@media (hover: hover) and (pointer: fine) {
    .prs-card:hover:not(.is-disabled):not(.is-spotlight-target) {
        transform: translateY(-3px);
        box-shadow: 0 8px 16px var(--color-shadow);
        border-color: var(--color-border-control);
        color: inherit;
    }
}

.prs-card.is-disabled {
    cursor: default;
    opacity: 0.55;
}

/* Thumbnail */
.prs-thumb {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-bg-elevated);
}

.prs-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.prs-thumb.is-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-border);
}

.prs-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    color: #ffffff;
    border-radius: 50%;
    font-size: 0.85rem;
    pointer-events: none;
}

@media (hover: hover) and (pointer: fine) {
    .prs-card:hover:not(.is-disabled):not(.is-spotlight-target) .prs-play {
        background: rgba(220, 38, 38, 0.85);
    }
}

.prs-book-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-primary);
    padding: 0.6rem 0.75rem 0.5rem;
    text-align: center;
}

.prs-badge {
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0.15rem 0.45rem;
    border-radius: 999px;
    background: var(--color-bg-elevated);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    margin: 0 auto 0.5rem;
}

@media (max-width: 576px) {
    .prs-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 0.75rem;
    }

    .prs-book-name {
        font-size: 0.8rem;
        padding: 0.5rem 0.5rem 0.4rem;
    }

    .prs-play {
        width: 30px;
        height: 30px;
        font-size: 0.75rem;
    }
}

@media (min-width: 768px) {
    .prs-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

/* Spotlight overlay (상/하단 nav 보다 낮은 z-index) */
.prs-spotlight-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.55);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.prs-spotlight-overlay.is-active {
    opacity: 1;
    pointer-events: auto;
    cursor: pointer;
}

/* Spotlight target card — 다크 모드에서도 흰 배경 강조 + 가독성 위해 텍스트 다크색 강제 */
.prs-card.is-spotlight-target {
    position: relative;
    z-index: 999;
    overflow: visible;
    background: #fff;
    border-radius: 0.75rem;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 1),
                0 4px 24px rgba(0, 0, 0, 0.25);
    transition: box-shadow 0.4s ease, background 0.4s ease;
}

html[data-theme="dark"] .prs-card.is-spotlight-target .prs-book-name {
    color: #1f2933;
}