/* Production styles for /Library — dựa trên ngôn ngữ thiết kế phương án A. */
.library-page {
    --lib-paper: var(--paper, #f5f1e7);
    --lib-surface: var(--surface, #fffdf7);
    --lib-ink: var(--ink, #243323);
    --lib-muted: var(--muted, #697166);
    --lib-line: var(--line, #d9d4c7);
    --lib-brass: var(--brass, #b77719);
    --lib-brass-soft: var(--brass-soft, #f1e3c7);
    --lib-sage: #6f826c;
    --lib-sage-soft: #e6ebe1;
    --lib-clay: #a7674e;
    --lib-sky: #6c8792;
    --lib-plum: #756879;
    color: var(--lib-ink);
    font-family: var(--font-body, "Be Vietnam Pro", sans-serif);
}

.library-eyebrow {
    display: block;
    color: var(--lib-brass);
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.library-topic {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    width: fit-content;
    padding: 0.25rem 0.62rem;
    border: 1px solid color-mix(in srgb, currentColor 18%, transparent);
    border-radius: 999px;
    background: color-mix(in srgb, currentColor 8%, transparent);
    color: var(--lib-brass);
    font-size: 0.64rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.library-avatar {
    display: inline-flex;
    flex: 0 0 auto;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--lib-sage-soft);
    color: var(--lib-ink);
    font-size: 0.68rem;
    font-weight: 800;
}

.library-author-row {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.library-author-row > span:last-child {
    display: grid;
    min-width: 0;
}

.library-author-row small {
    color: var(--lib-muted);
    font-size: 0.62rem;
}

.library-author-row strong {
    overflow: hidden;
    font-size: 0.76rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

.library-author-link:hover strong {
    color: var(--lib-brass);
}

.library-author-link:focus-visible {
    outline: 2px solid var(--lib-brass);
    outline-offset: 4px;
}

/* Hero + search */
.library-a {
    display: grid;
    gap: clamp(2rem, 5vw, 4.5rem);
}

.library-a-hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
    gap: clamp(1.5rem, 4vw, 3.5rem);
    align-items: end;
    overflow: hidden;
    padding: clamp(1.5rem, 4vw, 3rem);
    border-radius: 24px;
    background: var(--lib-ink);
    color: var(--lib-surface);
}

.library-a-hero::before {
    content: "";
    position: absolute;
    width: 360px;
    height: 360px;
    right: -120px;
    top: -180px;
    border: 1px solid color-mix(in srgb, var(--lib-brass) 42%, transparent);
    border-radius: 50%;
    box-shadow: 0 0 0 52px color-mix(in srgb, var(--lib-brass) 5%, transparent),
                0 0 0 104px color-mix(in srgb, var(--lib-brass) 4%, transparent);
    pointer-events: none;
}

.library-a-intro,
.library-search-panel {
    position: relative;
    z-index: 1;
}

.library-a-intro h1 {
    max-width: 560px;
    margin: 0.7rem 0 0.9rem;
    color: inherit;
    font-size: clamp(2rem, 4vw, 3.4rem);
    font-weight: 800;
    letter-spacing: -0.055em;
    line-height: 1.02;
}

.library-a-intro h1 em {
    color: #d8b06b;
    font-style: normal;
}

.library-a-intro > p {
    max-width: 620px;
    margin: 0;
    color: color-mix(in srgb, var(--lib-surface) 68%, transparent);
    font-size: clamp(0.9rem, 1.5vw, 1.05rem);
    line-height: 1.75;
}

.library-search-panel {
    display: grid;
    gap: 0.8rem;
    margin: 0;
    padding: clamp(1.2rem, 3vw, 2rem);
    border: 1px solid color-mix(in srgb, var(--lib-surface) 18%, transparent);
    border-radius: 20px;
    background: color-mix(in srgb, var(--lib-surface) 96%, transparent);
    color: var(--lib-ink);
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.2);
}

.library-search-panel > label {
    font-size: 0.76rem;
    font-weight: 800;
}

.library-search-control {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.65rem;
    min-width: 0;
    padding: 0.35rem;
    border: 1px solid var(--lib-line);
    border-radius: 13px;
    background: #fff;
}

.library-search-control > i {
    margin-left: 0.6rem;
    color: var(--lib-muted);
    font-size: 1.15rem;
}

.library-search-control input {
    min-width: 0;
    height: 44px;
    padding: 0;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--lib-ink);
    font: inherit;
    font-size: 0.82rem;
}

.library-search-control button {
    min-height: 44px;
    padding: 0 1rem;
    border: 0;
    border-radius: 9px;
    background: var(--lib-brass);
    color: #fff;
    font: inherit;
    font-size: 0.74rem;
    font-weight: 800;
    cursor: pointer;
}

.library-a-proof {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
}

.library-a-proof span {
    display: grid;
    color: var(--lib-muted);
    font-size: 0.62rem;
}

.library-a-proof strong {
    color: var(--lib-ink);
    font-size: 0.82rem;
    font-variant-numeric: tabular-nums;
}

/* Section heading + sort tabs */
.library-section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 2rem;
    padding-bottom: 1.2rem;
    border-bottom: 1px solid var(--lib-line);
}

.library-section-heading h2 {
    margin: 0.3rem 0 0;
    color: var(--lib-ink);
    font-size: clamp(1.7rem, 3vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.045em;
}

.library-section-heading p {
    margin: 0.45rem 0 0;
    color: var(--lib-muted);
    font-size: 0.76rem;
}

.library-sort-tabs {
    display: flex;
    gap: 1.1rem;
    overflow-x: auto;
}

.library-sort-tabs a {
    flex: 0 0 auto;
    padding: 0.6rem 0;
    border-bottom: 2px solid transparent;
    color: var(--lib-muted);
    font-size: 0.72rem;
    font-weight: 700;
    text-decoration: none;
}

.library-sort-tabs a.is-active {
    border-color: var(--lib-brass);
    color: var(--lib-ink);
}

/* Card grid */
.library-card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.library-set-card {
    position: relative;
    display: grid;
    min-width: 0;
    min-height: 320px;
    grid-template-rows: auto 1fr auto auto;
    gap: 1.25rem;
    overflow: hidden;
    padding: 1.25rem;
    border: 1px solid var(--lib-line);
    border-radius: 18px;
    background: var(--lib-surface);
    box-shadow: 0 12px 30px rgba(35, 48, 33, 0.05);
    transition: border-color var(--duration-fast) ease,
                box-shadow var(--duration-med) ease;
}

.library-set-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 4px;
    background: var(--card-accent, var(--lib-sage));
}

.library-set-card:hover {
    border-color: color-mix(in srgb, var(--card-accent, var(--lib-sage)) 42%, var(--lib-line));
    box-shadow: 0 18px 42px rgba(35, 48, 33, 0.09);
}

.library-accent-sage { --card-accent: var(--lib-sage); }
.library-accent-brass { --card-accent: var(--lib-brass); }
.library-accent-clay { --card-accent: var(--lib-clay); }
.library-accent-sky { --card-accent: var(--lib-sky); }
.library-accent-plum { --card-accent: var(--lib-plum); }
.library-accent-moss { --card-accent: #52664f; }

.library-set-card > header,
.library-set-card > footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.library-card-number {
    color: color-mix(in srgb, var(--card-accent) 35%, transparent);
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.06em;
}

.library-set-card h3 {
    margin: 0;
    color: var(--lib-ink);
    font-size: clamp(1.18rem, 2vw, 1.55rem);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.18;
    word-break: break-word;
}

.library-set-card-body > p {
    display: -webkit-box;
    overflow: hidden;
    margin: 0.75rem 0 0;
    color: var(--lib-muted);
    font-size: 0.76rem;
    line-height: 1.65;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.library-set-card > footer {
    padding-top: 1rem;
    border-top: 1px solid var(--lib-line);
}

.library-card-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.7rem;
    color: var(--lib-muted);
    font-size: 0.66rem;
}

.library-card-metrics span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.library-set-card > footer > a {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 0.35rem;
    color: var(--lib-ink);
    font-size: 0.7rem;
    font-weight: 800;
    text-decoration: none;
}

/* Empty states */
.library-empty {
    display: grid;
    justify-items: center;
    gap: 0.6rem;
    margin-top: 1.5rem;
    padding: clamp(2rem, 6vw, 4rem) 1.5rem;
    border: 1px dashed color-mix(in srgb, var(--lib-brass) 45%, var(--lib-line));
    border-radius: 18px;
    background: color-mix(in srgb, var(--lib-brass-soft) 40%, var(--lib-surface));
    text-align: center;
}

.library-empty > i {
    color: var(--lib-brass);
    font-size: 2rem;
}

.library-empty h3 {
    margin: 0;
    color: var(--lib-ink);
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.library-empty p {
    max-width: 420px;
    margin: 0;
    color: var(--lib-muted);
    font-size: 0.78rem;
    line-height: 1.7;
}

.library-empty a {
    color: var(--lib-brass);
    font-weight: 700;
}

/* Pager */
.library-pager {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    margin-top: 2rem;
}

.library-pager a {
    display: inline-flex;
    min-width: 40px;
    min-height: 40px;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0 0.7rem;
    border: 1px solid var(--lib-line);
    border-radius: 10px;
    background: var(--lib-surface);
    color: var(--lib-muted);
    font-size: 0.72rem;
    font-weight: 700;
    text-decoration: none;
}

.library-pager a.is-active {
    border-color: var(--lib-ink);
    background: var(--lib-ink);
    color: var(--lib-surface);
}

/* Focus styles — luôn nhìn thấy khi điều hướng bằng bàn phím */
.library-page a:focus-visible,
.library-page button:focus-visible,
.library-page input:focus-visible {
    outline: 2px solid var(--lib-brass);
    outline-offset: 2px;
}

.library-search-control:focus-within {
    border-color: var(--lib-brass);
}

@media (max-width: 900px) {
    .library-a-hero {
        grid-template-columns: 1fr;
    }

    .library-section-heading {
        align-items: stretch;
        flex-direction: column;
        gap: 0.8rem;
    }

    .library-sort-tabs {
        width: 100%;
    }

    .library-card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .library-a-hero {
        margin-inline: -0.25rem;
        grid-template-columns: minmax(0, 1fr);
        padding: 1.4rem;
        border-radius: 18px;
    }

    .library-a-intro h1 {
        font-size: clamp(1.85rem, 10vw, 2.6rem);
    }

    .library-search-panel {
        padding: 1rem;
    }

    .library-search-control {
        grid-template-columns: auto minmax(0, 1fr);
    }

    .library-search-control button {
        grid-column: 1 / -1;
        width: 100%;
    }

    .library-a-proof {
        grid-template-columns: 1fr;
    }

    .library-card-grid {
        grid-template-columns: 1fr;
    }

    .library-set-card {
        min-height: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .library-set-card {
        transition: none;
    }
}