/* ─── Library Grid ────────────────────────────────────────── */
.library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

/* ─── Book Card ───────────────────────────────────────────── */
.book-card {
    background: var(--app-card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--app-card-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    position: relative;
}

.book-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--app-primary-glow);
}

.book-cover-container {
    aspect-ratio: 5/6;
    background: var(--app-surface-hover);
    overflow: hidden;
    position: relative;
}

.book-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.book-card:hover .book-cover {
    transform: scale(1.05);
}

.book-info {
    padding: 0.85rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-title {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.25rem;
    color: var(--app-text);
}

.book-author {
    font-size: 0.78rem;
    color: var(--app-muted);
    margin-bottom: 0.45rem;
}

/* ─── Progress ────────────────────────────────────────────── */
.reading-progress-container {
    height: 4px;
    background: var(--app-card-border);
    border-radius: 2px;
    margin-top: auto;
}

.reading-progress-bar {
    height: 100%;
    background: var(--app-primary);
    border-radius: 2px;
    transition: width 0.3s;
}

/* ─── Badges & Tags ──────────────────────────────────────── */
.wip-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.15rem 0.55rem;
    background: var(--app-primary-glow);
    color: var(--app-primary);
    border: 1px solid var(--app-primary);
    border-radius: 20px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    animation: wip-pulse 2.5s ease-in-out infinite;
}

.footer-wip {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--app-primary);
    background: var(--app-primary-glow);
    padding: 0.18rem 0.6rem;
    border-radius: 20px;
    animation: wip-pulse 2.5s ease-in-out infinite;
}

@keyframes wip-pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.55;
    }
}

.resume-banner {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 16px;
    border: 1px solid color-mix(in srgb, var(--app-primary) 28%, var(--app-card-border));
    background: linear-gradient(135deg, color-mix(in srgb, var(--app-surface) 86%, var(--app-primary) 14%), var(--app-surface));
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.1rem;
}

.resume-banner-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--app-primary);
    background: color-mix(in srgb, var(--app-primary) 18%, transparent);
    border: 1px solid color-mix(in srgb, var(--app-primary) 36%, transparent);
    flex-shrink: 0;
}

.resume-banner-content {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.08rem;
}

.resume-banner-label {
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 0.11em;
    text-transform: uppercase;
    color: var(--app-muted);
}

.resume-banner-title {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    color: var(--app-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.resume-banner-meta {
    font-size: 0.78rem;
    color: var(--app-muted);
}

.resume-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.58rem 1rem;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--app-primary) 45%, var(--app-card-border));
    background: linear-gradient(180deg, var(--app-primary), var(--app-primary-hover));
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    box-shadow: 0 8px 18px color-mix(in srgb, var(--app-primary-glow) 85%, transparent);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

.resume-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 22px color-mix(in srgb, var(--app-primary-glow) 95%, transparent);
    filter: brightness(1.04);
}

.resume-btn:active {
    transform: translateY(0);
}

/* ─── Section Labels ──────────────────────────────────────── */
.library-section-label {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--app-muted);
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--app-card-border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.library-section-desc {
    font-size: 0.85rem;
    color: var(--app-muted);
    font-style: italic;
    margin: -0.5rem 0 1.25rem;
    line-height: 1.6;
}

.future-intro {
    display: grid;
    gap: 1rem;
    margin: 0 auto 2rem;
    max-width: 980px;
}

.future-block {
    padding: 1.25rem 1.5rem;
    border-radius: 18px;
    border: 1px solid var(--app-card-border);
    background: linear-gradient(135deg, color-mix(in srgb, var(--app-surface) 80%, var(--app-primary) 8%), var(--app-surface));
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.future-block:hover {
    border-color: var(--app-primary-glow);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.future-block p {
    color: var(--app-text);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* ─── Future Books ────────────────────────────────────────── */
.future-card {
    cursor: default;
    filter: grayscale(0.7);
    opacity: 0.75;
    box-shadow: var(--shadow-sm);
    transition: filter 0.3s, opacity 0.3s, transform 0.3s;
    position: relative;
}

.future-card:hover {
    filter: grayscale(0.3);
    opacity: 0.9;
    transform: translateY(-4px) scale(1.01);
    box-shadow: var(--shadow-md);
}

.future-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.2rem 0.55rem;
    border-radius: 4px;
    backdrop-filter: blur(4px);
}

.future-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(145deg, var(--app-surface-hover), var(--app-card-bg));
    color: var(--app-muted);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.book-genre-tag {
    display: inline-block;
    margin-top: 0.2rem;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--app-primary);
    opacity: 0.75;
}

/* Empty State */
.library-empty {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--app-card-bg);
    border-radius: 12px;
    border: 2px dashed var(--app-card-border);
    color: var(--app-muted);
}

.book-home {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 1.5rem 2rem 2.5rem;
}

.book-home-header {
    max-width: 1100px;
    margin: 0 auto 1.5rem;
}

.book-home-content {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(220px, 320px) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
}

.book-home-cover {
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid var(--app-card-border);
    background: var(--app-surface-hover);
    box-shadow: var(--shadow-lg);
}

.book-home-cover img {
    width: 100%;
    height: auto;
    display: block;
}

.book-home-meta {
    background: var(--app-card-bg);
    border-radius: 18px;
    border: 1px solid var(--app-card-border);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

.book-home-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--app-text);
}

.book-home-author {
    color: var(--app-muted);
    margin-bottom: 1.25rem;
}

.book-home-intro {
    margin-top: 1rem;
    line-height: 1.8;
    color: var(--app-text);
}

.book-home-intro hr {
    border: none;
    border-top: 1px solid var(--app-card-border);
    margin: 1rem 0;
}

/* ─── About Modal V2 ───────────────────────────────────────── */
.about-modal-v2 {
    max-width: 1100px;
    width: 90vw;
    height: 80vh;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
    border-radius: 24px;
    background: var(--app-card-bg);
    border: 1px solid var(--app-card-border);
    box-shadow: var(--shadow-2xl);
    position: relative;
}

.about-modal-glass-header {
    background: linear-gradient(135deg, color-mix(in srgb, var(--app-primary) 12%, var(--app-surface)), color-mix(in srgb, var(--app-surface-hover) 80%, var(--app-surface)));
    padding: 1.5rem 2rem 1.5rem 2rem;
    border-bottom: 1px solid color-mix(in srgb, var(--app-card-border) 40%, transparent);
    z-index: 10;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.about-modal-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.about-header-title {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.about-logo {
    width: 52px;
    height: 52px;
    background: var(--app-primary);
    color: white;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    box-shadow: 0 4px 15px var(--app-primary-glow);
}

.about-version {
    font-size: 0.8rem;
    color: var(--app-muted);
    font-weight: 500;
}

.about-tabs {
    display: flex;
    padding: 0 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--app-card-border);
    background: color-mix(in srgb, var(--app-surface) 30%, transparent);
}

.about-tab-btn {
    padding: 1.25rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--app-muted);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all var(--transition-fast);
}

.about-tab-btn:hover {
    color: var(--app-text);
    background: var(--app-surface-hover);
}

.about-tab-btn.active {
    color: var(--app-primary);
    border-bottom-color: var(--app-primary);
}

.about-scroll-content {
    flex: 1;
    overflow-y: auto;
    padding: 2.5rem;
    scrollbar-width: thin;
}

.about-tab-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-hero-text {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    line-height: 1.6;
    color: var(--app-text);
    text-align: center;
    margin-bottom: 3rem;
    padding: 0 2rem;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.about-card {
    padding: 2rem;
    border-radius: 20px;
    background: var(--app-surface);
    border: 1px solid var(--app-card-border);
    transition: all var(--transition-fast);
}

.about-card:hover {
    border-color: var(--app-primary);
    transform: translateY(-6px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about-card svg {
    color: var(--app-primary);
    margin-bottom: 1.25rem;
    width: 32px;
    height: 32px;
}

.about-card h4 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.about-card p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--app-muted);
}

.features-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    border-radius: 18px;
    background: var(--app-surface);
    border: 1px solid var(--app-card-border);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--app-primary-glow);
    color: var(--app-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-details strong {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.feature-details p {
    font-size: 0.95rem;
    color: var(--app-muted);
    line-height: 1.6;
}

.creator-profile {
    background: linear-gradient(135deg, var(--app-surface), color-mix(in srgb, var(--app-surface) 70%, var(--app-primary) 8%));
    padding: 3rem;
    border-radius: 28px;
    border: 1px solid var(--app-card-border);
}

.creator-header {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.creator-avatar-large {
    width: 100px;
    height: 100px;
    border-radius: 28px;
    background: var(--app-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-family: var(--font-serif);
    box-shadow: var(--shadow-xl);
}

.creator-info h4 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.creator-titles {
    color: var(--app-primary);
    font-weight: 700;
    font-size: 1.1rem;
}

.creator-bio {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--app-text);
    margin-bottom: 3rem;
}

.creator-links {
    display: flex;
    gap: 1.5rem;
}

.creator-link-btn {
    padding: 1rem 2rem;
    border-radius: 14px;
    background: var(--app-card-bg);
    border: 1px solid var(--app-card-border);
    color: var(--app-text);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all var(--transition-fast);
}

.creator-link-btn:hover {
    border-color: var(--app-primary);
    background: var(--app-primary);
    color: white;
}

.tips-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.tip-box {
    padding: 2rem;
    border-radius: 20px;
    background: var(--app-surface);
    border: 1px solid var(--app-card-border);
}

.tip-box.full-width {
    grid-column: span 2;
}

.tip-box h5 {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--app-primary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    font-weight: 700;
}

.tip-box ul {
    list-style: none;
    padding: 0;
}

.tip-box li {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--app-muted);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    line-height: 1.5;
}

.tip-box li::before {
    content: "•";
    color: var(--app-primary);
    font-weight: bold;
}

.tip-box code {
    background: color-mix(in srgb, var(--app-primary) 15%, transparent);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    font-family: monospace;
    font-weight: 700;
    color: var(--app-primary);
}

.about-footer {
    padding: 1.5rem 2.5rem;
    background: color-mix(in srgb, var(--app-surface) 60%, transparent);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--app-card-border);
}

.about-footer p {
    font-style: italic;
    font-size: 1rem;
    color: var(--app-muted);
}

.animate-fade-in {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 900px) {

    .about-grid,
    .features-list,
    .tips-grid {
        grid-template-columns: 1fr;
    }

    .about-tabs {
        padding: 0 1rem;
        gap: 0.25rem;
    }

    .about-tab-btn span {
        display: none;
    }

    .about-tab-btn {
        padding: 1rem;
    }

    .creator-header {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    .creator-links {
        flex-direction: column;
    }
}

/* ─── Import Zones ────────────────────────────────────────── */
.import-zone-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin: 1.5rem 0 3rem;
}

.import-zone {
    padding: 2.5rem 1.5rem;
    border-radius: 18px;
    border: 2px dashed var(--app-card-border);
    background: var(--app-card-bg);
    color: var(--app-muted);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.import-zone:hover {
    border-color: var(--app-primary);
    background: var(--app-surface-hover);
    color: var(--app-text);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.import-zone svg {
    margin-bottom: 1rem;
    width: 38px;
    height: 38px;
    opacity: 0.6;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.import-zone:hover svg {
    opacity: 1;
    transform: scale(1.1);
    color: var(--app-primary);
}

@media (max-width: 640px) {
    .import-zone-container {
        grid-template-columns: 1fr;
    }
}