/* ===== 성경책 개요 (book-description) ===== */

.book-desc {
    --book-desc-hero-from: #eef3fb;
    --book-desc-hero-to: var(--color-bg-elevated-bright);
    --book-desc-badge-bg: rgba(13, 110, 253, 0.1);
    --book-desc-skeleton-a: #e2e8f0;
    --book-desc-skeleton-b: #f1f5f9;

    background: var(--color-bg-elevated-bright);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    box-shadow: 0 8px 24px var(--color-shadow);
    overflow: hidden;
    animation: book-desc-fade-up 0.35s ease-out both;
}

html[data-theme="dark"] .book-desc {
    --book-desc-hero-from: #20262e;
    --book-desc-hero-to: var(--color-bg-elevated-bright);
    --book-desc-badge-bg: rgba(77, 171, 247, 0.18);
    --book-desc-skeleton-a: #2a3038;
    --book-desc-skeleton-b: #181c22;
}

/* ── 히어로 ── */
.book-desc-hero {
    position: relative;
    padding: 1.75rem 1.5rem 1.5rem;
    background: linear-gradient(160deg, var(--book-desc-hero-from) 0%, var(--book-desc-hero-to) 100%);
    border-bottom: 1px solid var(--color-border);
}

.book-desc-hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 1.5rem;
    width: 48px;
    height: 4px;
    background: var(--color-accent);
    border-radius: 0 0 4px 4px;
}

.book-desc-hero-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.75rem;
    min-height: 1.6rem;
}

.book-desc-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.65rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--color-accent);
    background: var(--book-desc-badge-bg);
}

.book-desc-badge:empty {
    display: none;
}

.book-desc-badge-muted {
    color: var(--color-text-secondary);
    background: var(--color-bg-base);
    border: 1px solid var(--color-border);
}

.book-desc-title {
    margin: 0 0 0.75rem;
    font-size: 1.9rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.25;
    color: var(--color-text-primary);
    word-break: keep-all;
}

.book-desc-summary {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-text-primary);
    word-break: keep-all;
}

/* ── 핵심 정보 ── */
.book-desc-facts {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    margin: 0;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-elevated);
}

.book-desc-fact {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 1rem 1.25rem;
    min-width: 0;
}

.book-desc-fact + .book-desc-fact {
    border-left: 1px solid var(--color-border);
}

.book-desc-fact-label {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
    text-transform: uppercase;
}

.book-desc-fact-icon {
    font-size: 0.9rem;
    line-height: 1;
}

.book-desc-fact-value {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.5;
    color: var(--color-text-primary);
    word-break: keep-all;
    overflow-wrap: anywhere;
}

/* ── 본문 섹션 ── */
.book-desc-section {
    padding: 1.5rem 1.5rem 0;
}

.book-desc-section:last-child {
    padding-bottom: 1.75rem;
}

.book-desc-section-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin: 0 0 0.6rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.book-desc-section-title::before {
    content: "";
    flex: 0 0 auto;
    width: 4px;
    height: 1.1em;
    border-radius: 2px;
    background: var(--color-accent);
}

.book-desc-text {
    margin: 0;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-primary);
    white-space: pre-line;
    word-break: keep-all;
}

/* ── 로딩 스켈레톤 ── */
.book-desc.is-loading [data-skeleton] {
    display: block;
    color: transparent;
    border-radius: 6px;
    background: linear-gradient(90deg, var(--book-desc-skeleton-a) 25%, var(--book-desc-skeleton-b) 50%, var(--book-desc-skeleton-a) 75%);
    background-size: 200% 100%;
    animation: book-desc-shimmer 1.5s ease-in-out infinite;
    pointer-events: none;
    user-select: none;
}

.book-desc.is-loading [data-skeleton="chip"] {
    display: inline-block;
    width: 3.5rem;
    height: 1.6rem;
    border-radius: 999px;
}

.book-desc.is-loading [data-skeleton="title"] {
    width: 45%;
    max-width: 240px;
    height: 2.2rem;
}

.book-desc.is-loading [data-skeleton="line"] {
    width: 70%;
    height: 1.2rem;
}

.book-desc.is-loading [data-skeleton="lines"] {
    width: 100%;
    height: 4.6rem;
}

/* ── 에러 ── */
.book-desc-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2.5rem 1.5rem;
    text-align: center;
    background: var(--color-bg-elevated);
    border: 1px dashed var(--color-border-control);
    border-radius: 14px;
    color: var(--color-text-secondary);
}

.book-desc-error-message {
    margin: 0;
    font-weight: 500;
}

/* ── 애니메이션 ── */
@keyframes book-desc-fade-up {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes book-desc-shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .book-desc {
        animation: none;
    }

    .book-desc.is-loading [data-skeleton] {
        animation: none;
    }
}

/* ── 반응형 ── */
@media (max-width: 767.98px) {
    .book-desc {
        border-radius: 12px;
    }

    .book-desc-hero {
        padding: 1.4rem 1.15rem 1.25rem;
    }

    .book-desc-hero::before {
        left: 1.15rem;
    }

    .book-desc-title {
        font-size: 1.6rem;
    }

    .book-desc-summary {
        font-size: 1rem;
    }

    .book-desc-facts {
        grid-template-columns: 1fr;
    }

    .book-desc-fact {
        flex-direction: row;
        align-items: baseline;
        gap: 0.75rem;
        padding: 0.8rem 1.15rem;
    }

    .book-desc-fact + .book-desc-fact {
        border-left: none;
        border-top: 1px solid var(--color-border);
    }

    .book-desc-fact-label {
        flex: 0 0 5.25rem;
    }

    .book-desc-fact-value {
        flex: 1 1 auto;
    }

    .book-desc-section {
        padding: 1.25rem 1.15rem 0;
    }

    .book-desc-section:last-child {
        padding-bottom: 1.5rem;
    }
}

@media (min-width: 992px) {
    .book-desc {
        max-width: 860px;
        margin: 0.5rem auto 0;
    }

    .book-desc-hero {
        padding: 2.25rem 2rem 1.75rem;
    }

    .book-desc-hero::before {
        left: 2rem;
    }

    .book-desc-fact {
        padding: 1.1rem 2rem;
    }

    .book-desc-section {
        padding: 1.75rem 2rem 0;
    }

    .book-desc-section:last-child {
        padding-bottom: 2.25rem;
    }
}