:root {
    --books-accent: #FFA001;
    --books-accent-soft: rgba(255, 160, 1, 0.16);
    --books-ink: #1f1f1f;
    --books-muted: #5f6368;
    --books-line: rgba(0, 0, 0, 0.1);
    --books-card: #FAFAFA;
    --books-surface: #fff;
    --books-shadow: 0 10px 24px rgba(0, 0, 0, 0.07);
}

body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: clamp(12.5px, 9px + 1vw, 16px);
}

.page-header {
    max-width: 1220px;
    margin: clamp(14px, 2.2vw, 28px) auto 0;
    padding: 0 clamp(10px, 2vw, 20px);
}

.page-header h2 {
    margin: 0;
    color: var(--books-ink);
    font-family: Arial, Helvetica, sans-serif;
    font-size: clamp(1.08rem, 0.82rem + 1.05vw, 1.85rem);
    line-height: 1.18;
    letter-spacing: 0;
    text-align: left;
    word-spacing: 0;
}

/* Контейнер секции книг */
.books-section {
    max-width: 1220px;
    margin: clamp(14px, 2vw, 24px) auto 64px;
    padding: 0 clamp(8px, 1.8vw, 20px);
    transition: margin-left .2s ease, max-width .2s ease;
}

/* Тулбар по мотивам чипов конструктора навыков */
.books-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: clamp(8px, 1.8vw, 16px);
    margin-bottom: clamp(12px, 1.8vw, 18px);
    flex-wrap: wrap;
}

.books-toolbar .hint {
    display: none;
    color: var(--books-muted);
    font-size: clamp(0.66rem, 0.58rem + 0.3vw, 0.88rem);
    line-height: 1.35;
}

.books-workbench {
    display: grid;
    grid-template-columns: minmax(180px, 1fr) auto;
    column-gap: clamp(6px, 1vw, 10px);
    row-gap: 0;
    align-items: start;
    justify-content: stretch;
    margin-bottom: clamp(8px, 1.2vw, 12px);
    padding: clamp(5px, 0.9vw, 8px);
    border: 1px solid var(--books-line);
    border-radius: 8px;
    background: var(--books-card);
    transition: row-gap 0.28s ease, border-color 0.24s ease, background-color 0.24s ease;
}

.books-field {
    display: grid;
    gap: 3px;
    min-width: 0;
    align-self: start;
    color: var(--books-muted);
    font-size: clamp(0.58rem, 0.5rem + 0.26vw, 0.76rem);
    line-height: 1.2;
}

.books-field input,
.books-field select {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
    border: 1px solid var(--books-line);
    background: var(--books-surface);
    color: var(--books-ink);
    font-family: Arial, Helvetica, sans-serif;
    font-size: clamp(0.68rem, 0.58rem + 0.32vw, 0.88rem);
    line-height: 1.2;
}

.books-field input {
    height: 32px;
    display: block;
    border-radius: 6px;
    padding: clamp(5px, 0.8vw, 7px) clamp(7px, 1vw, 10px);
    font-weight: 400;
}

.books-field select {
    height: 28px;
    border-radius: 999px;
    border-color: transparent;
    background-color: rgba(100, 116, 139, 0.14);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' fill='none' stroke='%236b7280' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-position: right 11px center;
    background-repeat: no-repeat;
    background-size: 12px 8px;
    padding: 0.18rem 1.55rem 0.18rem 0.46rem;
    font-weight: 600;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
}

.books-field select:focus {
    outline: none;
    border-color: rgba(15, 23, 42, 0.16);
}

.books-field--search {
    grid-column: auto;
    max-width: none;
}

.books-field--search > span {
    display: none;
}

.books-workbench.is-open {
    grid-template-columns: minmax(180px, 1fr) auto;
    row-gap: clamp(4px, 0.7vw, 7px);
}

.books-filters {
    --books-filter-label-height: clamp(0.7rem, 0.6rem + 0.26vw, 0.92rem);
    --books-filter-control-height: 28px;
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    gap: clamp(4px, 0.7vw, 7px);
    align-items: start;
    justify-content: flex-start;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transform: translateY(-6px);
    visibility: hidden;
    pointer-events: none;
    transition: max-height 0.34s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.2s ease, transform 0.24s ease, visibility 0s linear 0.34s;
}

.books-workbench.is-open .books-filters {
    max-height: 420px;
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
    transition: max-height 0.34s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.24s ease, transform 0.24s ease;
}

.books-filters .books-field {
    width: fit-content;
    grid-template-rows: var(--books-filter-control-height);
    opacity: 0;
    transform: translateY(-5px);
    transition: opacity 0.2s ease, transform 0.22s ease;
}

.books-filters .books-field > span {
    display: none;
}

.books-field--placeholder {
    position: relative;
}

.books-field--placeholder::after {
    content: attr(data-placeholder);
    position: absolute;
    left: 0.46rem;
    right: 1.55rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
    color: var(--books-muted);
    font: inherit;
    font-weight: 600;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    pointer-events: none;
    transition: opacity 0.16s ease;
}

.books-field--placeholder.is-selected::after {
    opacity: 0;
}

.books-field--placeholder select {
    position: relative;
    z-index: 0;
    color: transparent;
    caret-color: transparent;
    -webkit-text-fill-color: transparent;
    text-indent: -9999px;
    transition: color 0.18s ease, text-indent 0s linear 0.18s;
}

.books-field--placeholder.is-selected select {
    color: var(--books-ink);
    caret-color: var(--books-ink);
    -webkit-text-fill-color: var(--books-ink);
    text-indent: 0;
    transition: color 0.18s ease, text-indent 0s;
}

.books-filter-clear {
    position: absolute;
    top: 50%;
    right: 4px;
    transform: translateY(-50%) scale(0.9);
    z-index: 2;
    width: 18px;
    height: 18px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 999px;
    background: rgba(100, 116, 139, 0.18);
    color: var(--books-ink);
    font: inherit;
    font-weight: 800;
    line-height: 1;
    padding: 0;
    display: grid;
    place-items: center;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.books-filter-clear:focus-visible {
    outline: 2px solid rgba(59, 130, 246, 0.7);
    outline-offset: 2px;
}

.books-field--placeholder.is-selected .books-filter-clear {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(-50%) scale(1);
}

.books-field--placeholder.is-selected select {
    background-image: none;
    padding-right: 1.12rem;
}

.books-workbench.is-open .books-filters .books-field,
.books-workbench.is-open .books-filters .books-filter-button-slot {
    opacity: 1;
    transform: translateY(0);
}

.books-filters .books-field select {
    height: var(--books-filter-control-height);
    width: var(--books-filter-dyn-width, auto);
    min-width: min(100%, 92px);
    max-width: min(220px, 100vw - 32px);
    transition: width 0.18s ease;
}

.books-filter-button-slot {
    display: grid;
    grid-template-rows: var(--books-filter-control-height);
    gap: 0;
    align-self: start;
    color: var(--books-muted);
    font-size: clamp(0.58rem, 0.5rem + 0.26vw, 0.76rem);
    line-height: 1.2;
    opacity: 0;
    transform: translateY(-5px);
    transition: opacity 0.2s ease, transform 0.22s ease;
}

.books-filter-button-slot > span {
    display: none;
}

.books-filter-button-slot .books-action {
    align-self: start;
    height: var(--books-filter-control-height);
}

.books-workbench__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    min-width: 0;
    align-self: start;
    align-items: center;
    height: 28px;
    margin: 0;
    padding: 0;
}

.books-workbench:not(.is-open) #books-filter-close,
.books-workbench.is-open #books-filter-toggle {
    display: none;
}

.books-action {
    border: 1px solid var(--books-line);
    border-radius: 999px;
    background: var(--books-surface);
    color: var(--books-ink);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.2rem 0.55rem;
    font-family: Arial, Helvetica, sans-serif;
    font-size: clamp(0.66rem, 0.56rem + 0.3vw, 0.84rem);
    font-weight: 600;
    line-height: 1.2;
    cursor: pointer;
    height: 28px;
    box-sizing: border-box;
    margin: 0;
}

.books-action[aria-pressed="true"] {
    background: #1e1e1e;
    color: #F1F1F1;
}

.books-action[aria-expanded="true"] {
    background: #1e1e1e;
    color: #F1F1F1;
}

.books-action--close {
    display: none;
    min-width: 28px;
    width: auto;
    padding-left: 0.72rem;
    padding-right: 0.72rem;
    font-size: clamp(0.66rem, 0.56rem + 0.3vw, 0.84rem);
    line-height: 1.2;
}

.books-workbench.is-open .books-action--close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.books-qa-panel {
    position: fixed;
    left: 16px;
    bottom: 88px;
    z-index: 1150;
    display: none;
    width: min(360px, calc(100vw - 32px));
    max-height: min(72vh, 760px);
    overflow: auto;
    gap: clamp(9px, 1.4vw, 14px);
    padding: clamp(10px, 1.7vw, 16px);
    border: 1px solid var(--books-line);
    border-radius: 8px;
    background: var(--books-surface);
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.18);
}

.books-qa-panel[aria-hidden="false"] {
    display: grid;
}

.books-qa-panel__head {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
    align-items: start;
}

.books-qa-panel h3,
.books-qa-panel h4 {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    word-spacing: 0;
    letter-spacing: 0;
    color: var(--books-ink);
}

.books-qa-panel h3 {
    font-size: clamp(0.92rem, 0.78rem + 0.45vw, 1.2rem);
}

.books-qa-panel h4 {
    font-size: clamp(0.74rem, 0.64rem + 0.34vw, 0.94rem);
}

.books-qa-panel p {
    margin: 4px 0 0;
    color: var(--books-muted);
    font-size: clamp(0.64rem, 0.56rem + 0.28vw, 0.82rem);
}

.books-qa-panel__close {
    width: 30px;
    height: 30px;
    border: 1px solid var(--books-line);
    border-radius: 8px;
    background: var(--books-card);
    color: var(--books-ink);
    font: inherit;
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
}

.books-qa-panel__stats {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
}

.books-qa-panel__stats span,
.book-meta span {
    display: inline-flex;
    align-items: center;
    min-width: 0;
    border: 1px solid var(--books-line);
    border-radius: 999px;
    color: var(--books-muted);
    background: var(--books-card);
}

.books-qa-panel__stats span {
    padding: 4px 8px;
    font-size: clamp(0.58rem, 0.5rem + 0.24vw, 0.72rem);
}

.books-qa-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(8px, 1.4vw, 14px);
}

.books-qa-block {
    min-width: 0;
}

.books-qa-block ul {
    margin: 7px 0 0;
    padding-left: 1.1em;
    color: var(--books-muted);
    font-size: clamp(0.62rem, 0.54rem + 0.28vw, 0.8rem);
    line-height: 1.35;
}

.books-qa-block li + li {
    margin-top: 5px;
}

.books-checklist-groups {
    display: grid;
    gap: 10px;
    margin-top: 8px;
}

.books-checklist-group h5 {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    font-size: clamp(0.68rem, 0.58rem + 0.3vw, 0.84rem);
    color: var(--books-ink);
    letter-spacing: 0;
    word-spacing: 0;
}

.books-checklist-group ul {
    display: grid;
    margin: 5px 0 0;
    padding-left: 0;
    list-style: none;
    color: var(--books-muted);
    font-size: clamp(0.62rem, 0.54rem + 0.28vw, 0.8rem);
    line-height: 1.32;
}

.books-checklist-group li + li {
    margin-top: 5px;
}

.books-checklist-item {
    display: grid;
    gap: 6px;
    width: 100%;
    padding: 8px;
    border: 1px solid var(--books-line);
    border-radius: 8px;
    box-sizing: border-box;
}

.books-checklist-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    align-items: start;
}

.books-checklist-text {
    min-width: 0;
    color: var(--books-ink);
}

.books-checklist-controls {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px;
}

.books-checklist-answer {
    min-width: 48px;
    padding: 4px 8px;
    border: 1px solid var(--books-line);
    border-radius: 8px;
    background: var(--books-surface);
    color: var(--books-ink);
    font: inherit;
    cursor: pointer;
}

.books-checklist-answer.is-selected {
    border-color: #8d949d;
    background: rgba(141, 148, 157, 0.14);
    color: var(--books-ink);
    box-shadow: inset 0 0 0 1px rgba(141, 148, 157, 0.28);
}

.books-checklist-badge {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    padding: 3px 8px;
    border-radius: 8px;
    font-size: clamp(0.62rem, 0.54rem + 0.28vw, 0.78rem);
    font-weight: 700;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity .28s ease, transform .32s ease, background-color .24s ease, color .24s ease;
}

.books-checklist-badge.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.books-checklist-badge.is-static {
    transition: background-color .24s ease, color .24s ease;
}

.books-checklist-badge.is-correct {
    background: rgba(46, 160, 67, 0.14);
    color: #1f7a31;
}

.books-checklist-badge.is-wrong {
    background: rgba(217, 48, 37, 0.14);
    color: #b42318;
}

.books-checklist-actions {
    position: sticky;
    bottom: 8px;
    z-index: 4;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    margin-top: 10px;
    pointer-events: none;
}

.books-checklist-actions .books-action {
    --checklist-correct-width: 0%;
    position: relative;
    display: inline-flex;
    width: 188px;
    min-width: 188px;
    min-height: 32px;
    margin: 0 auto;
    padding: 5px 10px;
    overflow: hidden;
    isolation: isolate;
    align-items: center;
    justify-content: center;
    justify-self: center;
    text-align: center;
    white-space: nowrap;
    pointer-events: auto;
    transition: border-color .24s ease, background-color .24s ease, box-shadow .24s ease, color .24s ease;
}

.books-checklist-actions .books-action::before,
.books-checklist-actions .books-action::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    opacity: 0;
}

.books-checklist-actions .books-action::before {
    z-index: -2;
    background: linear-gradient(135deg, #ff5a5f 0%, #ff7a18 52%, #ff3d54 100%);
    transition: opacity .28s ease;
}

.books-checklist-actions .books-action::after {
    z-index: -1;
    width: var(--checklist-correct-width);
    background: linear-gradient(135deg, #34d399 0%, #22c55e 48%, #14b8a6 100%);
    transition: width .7s ease, opacity .28s ease;
}

.books-checklist-actions .books-action.is-verified {
    color: #fff;
}

.books-checklist-actions .books-action.is-verified::before,
.books-checklist-actions .books-action.is-verified::after {
    opacity: 1;
}

.books-checklist-feedback {
    margin: 10px 0 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--books-ink);
    font-size: clamp(0.64rem, 0.56rem + 0.24vw, 0.8rem);
    line-height: 1.35;
    text-align: center;
    width: 100%;
}

@media (max-width: 760px) {
    .books-checklist-row {
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: center;
    }

    .books-checklist-controls {
        justify-content: flex-end;
        flex-wrap: nowrap;
    }
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(clamp(108px, 18vw, 176px), 1fr));
    gap: clamp(8px, 1.5vw, 16px);
    align-items: stretch;
}

.books-grid.books-grid--limited {
    grid-template-columns: repeat(auto-fit, minmax(clamp(108px, 18vw, 176px), clamp(108px, 18vw, 176px)));
    justify-content: start;
}

.book-card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--books-card);
    border: 1px solid var(--books-line);
    border-radius: 8px;
    overflow: visible;
    box-shadow: var(--books-shadow);
    cursor: pointer;
}

.book-cover-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 2.75 / 4;
    background: #ececec;
    border-radius: 8px 8px 0 0;
    overflow: visible;
}

.book-cover-wrap--empty::before {
    content: "Нет обложки";
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: var(--books-muted);
    font-size: clamp(0.64rem, 0.56rem + 0.28vw, 0.8rem);
    text-align: center;
    padding: 8px;
}

.book-cover-wrap--empty .book-cover {
    display: none;
}

.book-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 8px 8px 0 0;
}

.like-btn {
    position: absolute;
    top: clamp(5px, 1vw, 9px);
    right: clamp(5px, 1vw, 9px);
    border: 1px solid rgba(0, 0, 0, 0.08);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.94);
    border-radius: 999px;
    width: clamp(26px, 4vw, 34px);
    height: clamp(26px, 4vw, 34px);
    box-sizing: border-box;
    padding: 0;
    display: grid;
    place-items: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.14);
    transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

.like-btn[aria-pressed="true"] {
    background: #ffe6ea;
    border-color: rgba(231, 59, 103, 0.26);
}

.like-icon {
    width: clamp(15px, 2.4vw, 20px);
    height: clamp(15px, 2.4vw, 20px);
    display: block;
    margin: 0;
}

.like-icon path {
    fill: none;
    stroke: #e73b67;
    stroke-width: 2;
}

.like-btn[aria-pressed="true"] .like-icon path {
    fill: #e73b67;
}

.book-body {
    flex: 1;
    padding: clamp(7px, 1.4vw, 11px);
    display: grid;
    align-content: start;
    gap: clamp(4px, 0.9vw, 8px);
    min-width: 0;
}

.book-title {
    min-width: 0;
    font-weight: 600;
    font-size: clamp(0.66rem, 0.58rem + 0.28vw, 0.88rem);
    line-height: 1.28;
}

.book-title a {
    color: inherit;
    text-decoration: none;
    padding: 0;
    border-radius: 0;
    background: transparent;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color 0.18s ease;
}

.book-title a:hover,
.book-title a:focus,
.book-title a:focus-visible {
    color: #d27f00;
    background: transparent !important;
    text-decoration: none;
    outline: none;
}

:root[data-theme="dark"] .book-title a:hover,
:root[data-theme="dark"] .book-title a:focus,
:root[data-theme="dark"] .book-title a:focus-visible {
    color: #ffbd4a;
    background: transparent !important;
}

.book-authors {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 3px;
    color: var(--books-muted);
    font-size: clamp(0.56rem, 0.52rem + 0.2vw, 0.72rem);
    line-height: 1.18;
    min-width: 0;
}

.book-author-pill {
    display: inline-flex;
    align-items: center;
    min-width: 0;
    max-width: 100%;
    padding: 1px 2px;
    border-radius: 999px;
    color: var(--books-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: inherit;
    line-height: inherit;
}

.book-author-pill--more {
    border-color: transparent;
    background: transparent;
    opacity: 0.6;
    padding-left: 1px;
    padding-right: 1px;
}

.book-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 1px;
}

.book-meta span {
    padding: 1px 3px;
    font-size: clamp(0.52rem, 0.46rem + 0.2vw, 0.66rem);
    line-height: 1.2;
}

/* Скелетоны */
.skeleton {
    background: linear-gradient(90deg, rgba(0,0,0,0.06), rgba(0,0,0,0.12), rgba(0,0,0,0.06));
    background-size: 200% 100%;
    animation: shimmer 1.2s infinite;
}
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}
.book-card.skeleton .book-cover-wrap { background: #eaeaea; }
.book-card.skeleton .book-body > div { height: 14px; border-radius: 6px; }
.book-card.skeleton .book-body > div:nth-child(1) { width: 70%; }
.book-card.skeleton .book-body > div:nth-child(2) { width: 50%; }
.book-card.skeleton .book-body > div:nth-child(3) { width: 90%; }

/* Сообщение об ошибке / пустом результате */
.inline-note {
    padding: 14px 16px;
    border-radius: 8px;
    background: rgba(255,160,1,0.12);
    border: 1px solid rgba(255,160,1,0.35);
}

/* Поддержка тем */
:root[data-theme="dark"] {
    --books-ink: #F1F1F1;
    --books-muted: #c7c7c7;
    --books-line: rgba(255, 255, 255, 0.1);
    --books-card: #1f1f1f;
    --books-surface: #101010;
    --books-shadow: 0 10px 24px rgba(0, 0, 0, 0.34);
}

:root[data-theme="dark"] .book-cover-wrap { background: #20232a; }
:root[data-theme="dark"] .inline-note {
    background: rgba(255,160,1,0.16);
    border-color: rgba(255,160,1,0.45);
}

.tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: clamp(5px, 1vw, 8px);
  border-radius: 8px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

.tab-btn {
  border: 1px solid #ccc;
  padding: clamp(5px, 1.1vw, 8px) clamp(8px, 1.7vw, 12px);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: var(--tab-grow, 1) 1 0;
  cursor: pointer;
  background: #FAFAFA;
  color: #000;
  font: inherit;
  font-size: clamp(0.66rem, 0.58rem + 0.3vw, 0.9rem);
  line-height: 1.2;
  min-width: 0;
  min-height: 38px;
  font-weight: 600;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}

#tab-all {
  --tab-grow: 0.65;
}

#tab-programming {
  --tab-grow: 1.9;
}

#tab-testing {
  --tab-grow: 1.35;
}

#tab-team {
  --tab-grow: 1;
}

#tab-favorites {
  --tab-grow: 1.25;
}

.tab-btn[aria-selected="true"] {
  background: #1e1e1e;
  border-color: #1e1e1e;
  color: #F1F1F1;
}

:root[data-theme="dark"] .tab-btn {
  background: #242424;
  border-color: #3b3b3b;
  color: #F1F1F1;
}

:root[data-theme="dark"] .tab-btn[aria-selected="true"] {
  background: #fff;
  border-color: #fff;
  color: #000;
}

:root[data-theme="dark"] .books-action[aria-pressed="true"] {
  background: #fff;
  border-color: #fff;
  color: #000;
}

:root[data-theme="dark"] .books-action[aria-expanded="true"] {
  background: #fff;
  border-color: #fff;
  color: #000;
}

:root[data-theme="dark"] .books-field select {
  background-color: rgba(255, 255, 255, 0.12);
  color: #F1F1F1;
}

:root[data-theme="dark"] .books-field select:focus {
  border-color: rgba(255, 255, 255, 0.18);
}

:root[data-theme="dark"] .books-filter-clear {
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.12);
  color: #F1F1F1;
}

.books-checklist-fab {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 1160;
  width: 58px;
  height: 58px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 50%;
  background: #FFA001;
  color: #1f1f1f;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.22);
  font-size: 24px;
  font-weight: 700;
}

.books-checklist-fab[aria-expanded="true"] {
  background: #1e1e1e;
  color: #F1F1F1;
}

@media (min-width: 721px) {
  body.books-checklist-open .books-section,
  body.books-checklist-open .page-header {
    max-width: calc(1220px - 280px);
    margin-left: min(420px, 33vw);
    margin-right: 24px;
  }
}

.book-inspector {
  position: fixed;
  inset: 0;
  z-index: 1300;
  display: flex;
  align-items: stretch;
  justify-content: flex-end;
  background: rgba(0, 0, 0, 0.42);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.24s ease, visibility 0s linear 0.24s;
}

.book-inspector[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 0.24s ease;
}

.book-inspector__dialog {
  position: relative;
  width: min(560px, 100vw);
  height: 100%;
  box-sizing: border-box;
  overflow: auto;
  overscroll-behavior: contain;
  touch-action: pan-y;
  background: var(--books-surface);
  color: var(--books-ink);
  padding: clamp(14px, 2.5vw, 24px);
  box-shadow: -16px 0 40px rgba(0, 0, 0, 0.22);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.book-inspector[aria-hidden="false"] .book-inspector__dialog {
  transform: translateX(0);
}

.book-inspector__close {
  position: sticky;
  top: 0;
  float: right;
  width: 34px;
  height: 34px;
  border: 1px solid var(--books-line);
  border-radius: 8px;
  background: var(--books-card);
  color: var(--books-ink);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}

.book-inspector h3,
.book-inspector h4 {
  margin: 0 0 10px;
  font-family: Arial, Helvetica, sans-serif;
  word-spacing: 0;
  letter-spacing: 0;
}

.book-inspector h3 {
  font-size: clamp(1rem, 0.84rem + 0.52vw, 1.32rem);
}

.book-inspector h4 {
  margin-top: 16px;
  font-size: clamp(0.78rem, 0.68rem + 0.34vw, 1rem);
}

.book-inspector__rows {
  display: grid;
  grid-template-columns: minmax(90px, 0.36fr) 1fr;
  gap: 7px 12px;
  margin: 0;
  font-size: clamp(0.68rem, 0.58rem + 0.3vw, 0.88rem);
}

.book-inspector__rows dt {
  color: var(--books-muted);
}

.book-inspector__rows dd {
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
}

.book-inspector__issues {
  margin: 0;
  padding-left: 1.2em;
  color: var(--books-muted);
  font-size: clamp(0.68rem, 0.58rem + 0.3vw, 0.88rem);
}

.book-inspector pre {
  max-height: 42vh;
  overflow: auto;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--books-line);
  border-radius: 8px;
  background: var(--books-card);
  color: var(--books-ink);
  font-size: clamp(0.58rem, 0.5rem + 0.22vw, 0.76rem);
  line-height: 1.35;
  white-space: pre-wrap;
}

body.book-inspector-open {
  overflow: hidden;
}

@media (max-width: 430px) {
  .books-workbench__actions {
    display: flex;
  }

  .books-action {
    width: auto;
  }

  .books-qa-panel__head {
    display: grid;
  }

  .books-qa-panel__stats {
    justify-content: flex-start;
  }

  .book-inspector__dialog {
    width: 100vw;
  }
}

@media (max-width: 520px) {
  .tabs {
    gap: 4px;
  }

  .tab-btn {
    min-width: 0;
    padding: 5px 4px;
    font-size: clamp(0.58rem, 0.5rem + 0.28vw, 0.74rem);
    min-height: 34px;
  }

  .books-qa-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .books-workbench,
  .books-workbench.is-open {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .books-workbench__actions {
    display: flex;
  }

  .books-filters {
    display: flex;
  }

  .books-filters .books-field {
    max-width: 100%;
  }

  .books-qa-panel {
    left: 8px;
    right: 8px;
    bottom: 12px;
    width: auto;
    max-height: 36vh;
    border-radius: 8px;
    padding: 10px;
  }

  .books-checklist-fab {
    left: 12px;
    bottom: 12px;
    width: 48px;
    height: 48px;
    font-size: 20px;
  }

  body.books-checklist-open .books-checklist-fab {
    display: none;
  }
}

@media (max-width: 900px) {
  .book-inspector {
    align-items: flex-end;
    justify-content: stretch;
  }

  .book-inspector__dialog {
    width: 100vw;
    height: min(50vh, 540px);
    max-height: min(50vh, 540px);
    border-radius: 14px 14px 0 0;
    box-shadow: 0 -16px 40px rgba(0, 0, 0, 0.26);
    transform: translateY(100%);
  }

  .book-inspector[aria-hidden="false"] .book-inspector__dialog {
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .books-workbench,
  .books-filters,
  .books-filters .books-field,
  .books-filter-button-slot,
  .books-field--placeholder select,
  .books-filter-clear,
  .book-inspector,
  .book-inspector__dialog {
    transition: none;
  }
}

/* === Единая QA-панель === */
body:not(.qa-hub-ready) .qa-hub-fab,
body:not(.qa-hub-ready) .qa-hub-panel {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

body.qa-hub-no-anim .qa-hub-panel {
  transition: none !important;
}

.qa-hub-fab {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 1200;
  min-width: 52px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: #FFA001;
  color: #1f1f1f;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(0.72rem, 0.64rem + 0.24vw, 0.88rem);
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.22);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.qa-hub-fab:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.24);
}

body.qa-hub-open .qa-hub-fab {
  display: none;
}

.qa-hub-panel {
  position: fixed;
  left: 16px;
  bottom: 16px;
  z-index: 1190;
  width: min(420px, calc(100vw - 32px));
  max-height: min(74vh, 760px);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  border: 1px solid var(--books-line);
  border-radius: 12px;
  background: var(--books-surface);
  box-shadow: 0 16px 42px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.22s ease, visibility 0s linear 0.22s;
}

.qa-hub-panel[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition: opacity 0.22s ease, transform 0.24s ease;
}

@media (min-width: 721px) {
  html.qa-hub-preopen .page-header,
  html.qa-hub-preopen .books-section {
    max-width: min(1220px, calc(100vw - min(460px, 38vw) - 56px));
    margin-left: calc(min(460px, 38vw) + 36px);
    margin-right: 20px;
    transition: none !important;
  }

  .qa-hub-panel {
    left: 16px;
    top: 106px;
    bottom: 16px;
    width: min(460px, 38vw);
    max-height: none;
    transform: translateX(-10px);
    transition: opacity 0.22s ease, transform 0.24s ease, visibility 0s linear 0.24s;
  }

  .qa-hub-panel[aria-hidden="false"] {
    transform: translateX(0);
  }

  body.qa-hub-open .page-header,
  body.qa-hub-open .books-section {
    max-width: min(1220px, calc(100vw - min(460px, 38vw) - 56px));
    margin-left: calc(min(460px, 38vw) + 36px);
    margin-right: 20px;
    transition: margin-left .24s ease, max-width .24s ease;
  }
}

.qa-hub-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
  padding: 8px;
  border-bottom: 1px solid var(--books-line);
  background: var(--books-card);
}

.qa-hub-tabs {
  display: inline-flex;
  gap: 5px;
}

.qa-hub-tab {
  border: 1px solid var(--books-line);
  border-radius: 999px;
  background: var(--books-surface);
  color: var(--books-ink);
  padding: 4px 10px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(0.64rem, 0.56rem + 0.24vw, 0.78rem);
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
}

.qa-hub-tab[aria-selected="true"] {
  background: #1e1e1e;
  border-color: #1e1e1e;
  color: #F1F1F1;
}

.qa-hub-close {
  width: 28px;
  height: 28px;
  border: 1px solid var(--books-line);
  border-radius: 8px;
  background: var(--books-surface);
  color: var(--books-ink);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}

.qa-hub-body {
  min-height: 0;
  overflow: auto;
  padding: 8px;
  overscroll-behavior: contain;
  touch-action: pan-y;
}

.qa-hub-panel .bug-panel,
.qa-hub-panel .books-qa-panel {
  position: static;
  left: auto;
  right: auto;
  bottom: auto;
  width: 100%;
  max-width: none;
  max-height: none;
  display: block;
  border: none;
  border-radius: 0;
  box-shadow: none;
  background: transparent;
  padding: 0;
  margin: 0;
}

.qa-hub-panel .books-qa-panel {
  display: grid;
  overflow: visible;
}

.qa-hub-panel .bug-panel[aria-hidden="true"],
.qa-hub-panel .books-qa-panel[aria-hidden="true"] {
  display: none;
}

.bug-panel {
  display: none;
  font-size: clamp(0.64rem, 0.56rem + 0.24vw, 0.78rem);
}

.qa-hub-panel .bug-panel h4 {
  margin: 0 0 8px;
  font-size: clamp(0.8rem, 0.7rem + 0.3vw, 0.95rem);
  color: #e53935;
}

.qa-hub-panel .books-qa-panel__head {
  grid-template-columns: 1fr;
  gap: 6px;
}

.qa-hub-panel .books-qa-grid {
  grid-template-columns: 1fr;
  gap: 8px;
}

.qa-hub-panel .books-qa-block,
.qa-hub-panel .books-checklist-group ul,
.qa-hub-panel .books-checklist-group label,
.qa-hub-panel .books-qa-block ul {
  text-align: left;
  justify-items: start;
  align-items: start;
}

.qa-hub-panel .books-checklist-group label {
  justify-content: start;
}

.qa-hub-panel .books-qa-panel__stats {
  justify-content: flex-start;
}

.bug-panel h4 {
  margin: 0 0 8px;
  font-size: 16px;
  color: #e53935;
}

.bug-item {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "text actions"
    "status actions";
  gap: 6px 10px;
  padding: 10px;
  border-radius: 8px;
  border-left: 3px solid #8d949d;
  background: #fafafa;
  transition: background 0.2s, opacity 0.2s;
}

.bug-item + .bug-item {
  margin-top: 4px;
}
.bug-text { grid-area: text; }
.bug-actions { grid-area: actions; display: flex; gap: 6px; align-items: start; }
.bug-status { grid-area: status; font-size: 12px; opacity: .8; }

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.08);
  background: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
  transition: transform .15s, background .15s, box-shadow .15s, border-color .15s;
  font-size: 18px;
}
.icon-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,.12); }
.icon-btn:focus { outline: none; border-color: #FFA001; }

/* Состояния бага */
.bug-item.status-open  { background: #ffe1d2; border-left-color: #c45757; } /* баг воспроизводится */
.bug-item.status-fixed { background: #daf4e9; border-left-color: #1f6a45; opacity: 0.92; } /* баг исправлен */

/* Подсветка активной кнопки */
.icon-btn[aria-pressed="true"] { background: #ffe7c2; }
.btn-fixed[aria-pressed="true"] { background: #c9f2e4; }

/* Тёмная тема */
html[data-theme="dark"] .bug-panel { background: #101010; color: #F1F1F1; }
html[data-theme="dark"] .bug-item { background: #212121; border-left-color: #6f7780; }
html[data-theme="dark"] .bug-item.status-open  { background: #302322; border-left-color: #ce6f6f; }
html[data-theme="dark"] .bug-item.status-fixed { background: #1f2d27; border-left-color: #3f9b69; }
html[data-theme="dark"] .icon-btn { background: #16181d; color: #F1F1F1; border-color: rgba(255,255,255,0.08); }
html[data-theme="dark"] .icon-btn[aria-pressed="true"] { background: #3a2d22; }
html[data-theme="dark"] .btn-fixed[aria-pressed="true"] { background: #25433a; }
html[data-theme="dark"] .qa-hub-tab[aria-selected="true"] { background: #fff; border-color: #fff; color: #000; }
html[data-theme="dark"] .qa-hub-fab { border-color: rgba(255,255,255,0.14); box-shadow: 0 8px 22px rgba(0, 0, 0, 0.42); }
html[data-theme="dark"] .qa-hub-panel .bug-panel,
html[data-theme="dark"] .qa-hub-panel .books-qa-panel { background: transparent; }

@media (max-width: 720px) {
  .qa-hub-fab {
    left: 12px;
    bottom: 12px;
    min-width: 48px;
    height: 38px;
    padding: 0 11px;
    font-size: clamp(0.64rem, 0.56rem + 0.28vw, 0.76rem);
  }

  .qa-hub-panel {
    left: 0;
    right: 0;
    bottom: 0;
    top: auto;
    width: auto;
    max-height: 42vh;
    border-radius: 10px 10px 0 0;
    border-bottom: 0;
    transform: translateY(14px);
  }

  .qa-hub-head {
    padding: 6px;
    gap: 6px;
  }

  .qa-hub-tab {
    padding: 4px 8px;
    font-size: clamp(0.6rem, 0.54rem + 0.24vw, 0.72rem);
  }

  .qa-hub-body {
    padding: 6px;
  }
}