/* Theme variables come from Telegram WebApp; fallbacks for desktop browser dev. */
:root {
    --bg: var(--tg-theme-bg-color, #ffffff);
    --text: var(--tg-theme-text-color, #1a1a1a);
    --hint: var(--tg-theme-hint-color, #707579);
    --link: var(--tg-theme-link-color, #2481cc);
    --button: var(--tg-theme-button-color, #2481cc);
    --button-text: var(--tg-theme-button-text-color, #ffffff);
    --secondary-bg: var(--tg-theme-secondary-bg-color, #f4f4f5);
    --section-bg: var(--tg-theme-section-bg-color, var(--secondary-bg));
    --section-header-text: var(--tg-theme-section-header-text-color, var(--hint));
    --separator: var(--tg-theme-section-separator-color, rgba(0, 0, 0, 0.06));
    --destructive: var(--tg-theme-destructive-text-color, #d83a3a);
    /* Spine label font (overridable). Stage 5F.1 visual polish. */
    --spine-text-font-stack: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 15px;
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--link);
    text-decoration: none;
}

/* ---- Header ---- */

.app-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--bg);
    border-bottom: 1px solid var(--separator);
    padding: 8px 12px 0;
}

.header-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

#search-input {
    flex: 1;
    height: 36px;
    padding: 0 12px;
    border: none;
    border-radius: 18px;
    background: var(--secondary-bg);
    color: var(--text);
    font-size: 15px;
    outline: none;
}

#search-input::placeholder {
    color: var(--hint);
}

.tabs {
    display: flex;
    gap: 4px;
    margin-top: 8px;
}

.tabs a {
    flex: 1;
    text-align: center;
    padding: 10px 8px;
    color: var(--hint);
    font-weight: 500;
    border-bottom: 2px solid transparent;
}

.tabs a.active {
    color: var(--link);
    border-bottom-color: var(--link);
}

/* ---- Main / pages ---- */

.app-root {
    padding: 0;
    min-height: calc(100vh - 100px);
}

.loader, .empty, .error {
    padding: 32px 16px;
    text-align: center;
    color: var(--hint);
}

.error {
    color: var(--destructive);
}

/* ---- Filter bar (catalog page) ---- */

.filter-bar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 12px;
    background: var(--bg);
    border-bottom: 1px solid var(--separator);
}

.filter-bar select,
.filter-bar input {
    width: 100%;
    height: 34px;
    padding: 0 10px;
    border: 1px solid var(--separator);
    border-radius: 8px;
    background: var(--secondary-bg);
    color: var(--text);
    font-size: 14px;
    outline: none;
}

.filter-bar .year-range {
    display: flex;
    gap: 6px;
    grid-column: 1 / -1;
}

.filter-bar .year-range input {
    flex: 1;
    min-width: 0;
}

.filter-bar .f-reset {
    grid-column: 1 / -1;
    height: 34px;
    border: none;
    border-radius: 8px;
    background: var(--secondary-bg);
    color: var(--hint);
    font-size: 13px;
    cursor: pointer;
}

/* ---- Author list (authors page) ---- */

.author-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--separator);
}

.author-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg);
    cursor: pointer;
}

.author-row:active {
    background: var(--secondary-bg);
}

.author-row .name {
    flex: 1;
    min-width: 0;
    font-size: 15px;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.author-row .count {
    margin-left: 12px;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--secondary-bg);
    color: var(--hint);
    font-size: 12px;
}

/* ---- Book list (cards) ---- */

.book-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--separator);
}

.book-card {
    display: flex;
    align-items: stretch;
    gap: 12px;
    padding: 12px;
    background: var(--bg);
    cursor: pointer;
    transition: background 0.1s;
}

.book-card:active {
    background: var(--secondary-bg);
}

.book-card .cover {
    flex: 0 0 60px;
    width: 60px;
    height: 90px;
    background: var(--secondary-bg);
    border-radius: 6px;
    object-fit: cover;
    display: block;
}

.book-card .cover-placeholder {
    flex: 0 0 60px;
    width: 60px;
    height: 90px;
    background: var(--secondary-bg);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--hint);
    font-size: 11px;
}

.book-card .info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
}

.book-card .title {
    font-weight: 600;
    font-size: 15px;
    line-height: 1.3;
    color: var(--text);
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.book-card .authors {
    font-size: 13px;
    color: var(--hint);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-card .meta {
    font-size: 12px;
    color: var(--hint);
}

/* Pagination control at the bottom of the catalog list */
.load-more {
    padding: 16px;
    text-align: center;
    background: var(--bg);
}

.load-more button {
    background: var(--button);
    color: var(--button-text);
    border: none;
    padding: 10px 20px;
    border-radius: 18px;
    font-size: 15px;
    cursor: pointer;
}

.load-more button:disabled {
    opacity: 0.5;
}

/* ---- Book detail page ---- */

.book-detail {
    padding: 16px;
}

.book-detail .cover-large {
    display: block;
    max-width: 200px;
    width: 100%;
    margin: 0 auto 16px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.book-detail h1 {
    font-size: 20px;
    font-weight: 700;
    margin: 0 0 8px;
}

.book-detail .authors-line {
    font-size: 16px;
    color: var(--text);
    margin-bottom: 12px;
}

.book-detail .meta-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 6px 12px;
    background: var(--section-bg);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}

.book-detail .meta-grid .label {
    color: var(--hint);
}

.book-detail .meta-grid .value {
    color: var(--text);
    word-break: break-word;
}

.book-detail .recognized-line {
    font-size: 12px;
    color: var(--hint);
    text-align: right;
    margin: -10px 0 14px;
}

.book-detail .description {
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 16px;
    white-space: pre-wrap;
    word-break: break-word;
}

.book-detail .toc-section {
    background: var(--section-bg);
    border-radius: 8px;
    overflow: hidden;
}

.book-detail .toc-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: transparent;
    border: none;
    padding: 14px 12px;
    color: var(--text);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
}

.book-detail .toc-toggle .arrow {
    transition: transform 0.2s;
}

.book-detail .toc-toggle.open .arrow {
    transform: rotate(180deg);
}

.book-detail .toc-content {
    padding: 0 12px 14px;
    font-size: 14px;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text);
}

.book-detail .toc-content[hidden] {
    display: none;
}

.book-actions {
    display: flex;
    gap: 8px;
    margin-top: 24px;
    flex-wrap: wrap;
}

/* ---- Buttons ---- */

.btn-primary, .btn-secondary, .btn-destructive {
    flex: 1;
    min-width: 120px;
    height: 40px;
    padding: 0 16px;
    border: none;
    border-radius: 20px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
}

.btn-primary {
    background: var(--button);
    color: var(--button-text);
}

.btn-secondary {
    background: var(--secondary-bg);
    color: var(--text);
}

.btn-destructive {
    background: var(--secondary-bg);
    color: var(--destructive);
}

.btn-primary:disabled,
.btn-secondary:disabled,
.btn-destructive:disabled {
    opacity: 0.5;
    cursor: default;
}

/* ---- Add page ---- */

.add-page {
    padding: 16px;
}

.add-page h2 {
    margin: 0 0 8px;
    font-size: 18px;
}

.add-page .hint {
    color: var(--hint);
    font-size: 13px;
    margin: 0 0 16px;
}

.pickers {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 16px;
}

.picker {
    display: block;
    padding: 12px;
    background: var(--section-bg);
    border: 1px dashed var(--separator);
    border-radius: 10px;
    cursor: pointer;
}

.picker.required {
    border-color: var(--link);
}

.picker-label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 14px;
}

.picker-label em {
    color: var(--hint);
    font-style: normal;
    font-weight: normal;
    font-size: 12px;
    margin-left: 6px;
}

.picker input[type="file"] {
    display: block;
    margin-top: 8px;
    color: var(--text);
    font-size: 13px;
}

.picker-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    min-height: 0;
}

.picker-preview .thumb {
    width: 64px;
    height: 80px;
    object-fit: cover;
    border-radius: 6px;
    background: var(--bg);
}

.model-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 4px 0 12px;
    font-size: 13px;
    flex-wrap: wrap;
}

.model-row label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--hint);
}

.model-row select {
    height: 32px;
    padding: 0 8px;
    border: 1px solid var(--separator);
    border-radius: 6px;
    background: var(--secondary-bg);
    color: var(--text);
    font-size: 13px;
}

.model-row .reset-default {
    background: none;
    border: none;
    color: var(--link);
    font-size: 12px;
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
}

.add-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.add-status {
    padding: 12px;
    background: var(--section-bg);
    border-radius: 10px;
}

.job-status .state {
    font-weight: 600;
    margin-bottom: 8px;
}

.job-status .bar {
    height: 6px;
    background: var(--secondary-bg);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.job-status .bar-fill {
    height: 100%;
    background: var(--button);
    transition: width 0.3s ease;
}

.job-status .msg {
    font-size: 13px;
    color: var(--hint);
}

.job-status.error .state {
    color: var(--destructive);
}

.job-status .actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.job-status .actions button {
    flex: 1;
    height: 36px;
    border: none;
    border-radius: 18px;
    background: var(--secondary-bg);
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
}

.job-status .retry-row {
    margin-top: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

.job-status .retry-row label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--hint);
}

.job-status .retry-row select {
    height: 32px;
    padding: 0 8px;
    border: 1px solid var(--separator);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
}

/* ---- Edit form ---- */

.book-edit {
    padding: 16px;
}

.book-edit h2 {
    margin: 0 0 16px;
    font-size: 18px;
}

.book-edit .cover-large,
.book-edit .cover-placeholder-large {
    display: block;
    max-width: 160px;
    width: 100%;
    margin: 0 auto 16px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.book-edit .cover-placeholder-large {
    height: 200px;
    background: var(--secondary-bg);
    color: var(--hint);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    box-shadow: none;
}

.cover-replace {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin-bottom: 16px;
}

.cover-replace .cover-large,
.cover-replace .cover-placeholder-large {
    margin-bottom: 0;
}

.btn-replace-cover {
    display: inline-block;
    padding: 6px 14px;
    background: var(--secondary-bg);
    color: var(--text);
    border-radius: 14px;
    font-size: 13px;
    cursor: pointer;
}

.btn-replace-cover:hover {
    background: var(--separator);
}

.edit-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.edit-form label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
    color: var(--hint);
}

.edit-form input,
.edit-form textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--separator);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
    font-family: inherit;
    outline: none;
    resize: vertical;
}

.edit-form input:focus,
.edit-form textarea:focus {
    border-color: var(--link);
}

.edit-form .row-pair {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.edit-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.edit-error {
    color: var(--destructive);
    font-size: 13px;
    padding: 8px 0;
}

.danger-zone {
    margin-top: 40px;
    padding-top: 16px;
    border-top: 1px solid var(--separator);
}

.btn-danger-link {
    background: none;
    border: none;
    color: var(--destructive);
    font-size: 14px;
    cursor: pointer;
    padding: 8px 0;
    text-align: left;
    text-decoration: underline;
}

.btn-danger-link:disabled {
    opacity: 0.5;
    cursor: default;
}

/* ============================================================
   Stage 5C/5D — Storage (rooms / cabinets / shelves / placements)
   ============================================================ */

.btn-link {
    background: none;
    border: none;
    color: var(--link);
    font-size: 14px;
    cursor: pointer;
    padding: 4px 6px;
    text-decoration: none;
}
.btn-link:hover { text-decoration: underline; }

.storage-page,
.room-page,
.cabinet-new-page,
.cabinet-page,
.cabinet-edit-page,
.place-page {
    padding: 16px;
}

.page-actions {
    margin: 16px 0;
}
.page-actions .btn-primary,
.page-actions .btn-secondary {
    width: 100%;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    padding: 12px 16px;
}

.create-form,
.rename-form {
    background: var(--section-bg);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.create-form input,
.rename-form input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--separator);
    border-radius: 8px;
}
.form-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}
.form-error {
    color: var(--destructive);
    font-size: 13px;
}

.room-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--separator);
}
.room-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bg);
    cursor: pointer;
}
.room-row:active { background: var(--secondary-bg); }
.room-row .name { flex: 1; font-weight: 600; }
.room-row .count {
    margin-left: 12px;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--secondary-bg);
    color: var(--hint);
    font-size: 12px;
}

.page-header-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
}
.page-header-row h1 { margin: 0; font-size: 22px; }

.cabinet-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.cabinet-card {
    display: block;
    padding: 14px 16px;
    background: var(--section-bg);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text);
}
.cabinet-card:active { background: var(--secondary-bg); }
.cabinet-card .name { font-weight: 600; }
.cabinet-card .meta { font-size: 13px; color: var(--hint); margin-top: 4px; }

.cabinet-meta {
    font-size: 13px;
    color: var(--hint);
    margin-bottom: 8px;
}
.cabinet-notes {
    background: var(--section-bg);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    color: var(--hint);
    margin-bottom: 16px;
}

.cabinet-shelves {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.cabinet-shelf-block {
    background: var(--section-bg);
    border-radius: 10px;
    padding: 12px;
}
.shelf-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 8px;
}
.shelf-title { font-weight: 600; font-size: 15px; }
.shelf-count { font-size: 12px; color: var(--hint); }

.shelf-row-block { margin-top: 8px; }
.shelf-row-block .row-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--hint);
    margin-bottom: 4px;
}
.shelf-book-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.shelf-book-line {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    background: var(--bg);
    border-radius: 8px;
    cursor: pointer;
}
.shelf-book-line:active { background: var(--secondary-bg); }
.shelf-book-line.highlighted {
    outline: 2px solid #FFB300;
    animation: blinkHighlight 0.8s ease-in-out 3;
}
@keyframes blinkHighlight {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255,179,0,0); }
    50%      { box-shadow: 0 0 0 4px rgba(255,179,0,0.5); }
}
.shelf-book-line .thumb {
    width: 36px;
    height: 50px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
}
.shelf-book-line .thumb-placeholder {
    width: 36px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--secondary-bg);
    color: var(--hint);
    border-radius: 4px;
    flex-shrink: 0;
}
.shelf-book-line .title { font-size: 14px; }
.shelf-book-line .authors { font-size: 12px; color: var(--hint); }
.empty-row {
    font-size: 13px;
    color: var(--hint);
    font-style: italic;
    padding: 4px 0;
}

.edit-section { margin: 24px 0; }
.edit-section h2 { font-size: 16px; margin: 0 0 8px; }
.meta-form, .cab-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.meta-form label, .cab-form label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
    color: var(--hint);
}
.meta-form input, .meta-form textarea,
.cab-form input, .cab-form textarea {
    padding: 10px 12px;
    border: 1px solid var(--separator);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text);
    background: var(--bg);
}

.shelves-table {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.shelf-edit-row {
    display: grid;
    grid-template-columns: auto 1fr 1fr auto auto;
    gap: 8px;
    align-items: center;
    padding: 8px;
    background: var(--section-bg);
    border-radius: 8px;
    font-size: 13px;
}
.shelf-edit-row .shelf-num { font-weight: 600; min-width: 60px; }
.shelf-edit-row label.inline {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 11px;
    color: var(--hint);
}
.shelf-edit-row input, .shelf-edit-row select {
    width: 100%;
    padding: 4px 6px;
    border: 1px solid var(--separator);
    border-radius: 6px;
    font-size: 13px;
    background: var(--bg);
}
.shelf-edit-row .shelf-status {
    font-size: 12px;
    color: var(--hint);
    white-space: nowrap;
}

.placement-section {
    margin: 16px 0;
    padding: 12px;
    background: var(--section-bg);
    border-radius: 8px;
}
.placement-section h3 {
    margin: 0 0 6px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--hint);
    font-weight: 600;
}
.placement-line {
    font-size: 14px;
    line-height: 1.4;
}
.placement-section.unplaced .placement-line {
    color: var(--hint);
}
.placement-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 6px;
}

.place-book-info {
    background: var(--section-bg);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
}
.place-book-info .title { font-weight: 600; }
.place-book-info .authors { font-size: 13px; color: var(--hint); }

.place-picker {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.place-picker .form-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.place-picker label {
    font-size: 13px;
    color: var(--hint);
}
.place-picker select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--separator);
    border-radius: 8px;
    background: var(--bg);
    font-size: 14px;
}
.place-picker .hint { font-size: 13px; color: var(--hint); }

.row-radios {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.row-radio {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    background: var(--secondary-bg);
    border-radius: 16px;
    font-size: 13px;
    cursor: pointer;
}
.row-radio input { margin: 0; }

.rows-mod {
    margin-top: 6px;
    font-size: 12px;
    color: var(--hint);
    display: flex;
    align-items: center;
    gap: 6px;
}

.position-slots {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
    background: var(--bg);
    border-radius: 8px;
    border: 1px solid var(--separator);
}
.pos-gap {
    text-align: left;
    background: none;
    border: 1px dashed var(--separator);
    border-radius: 6px;
    padding: 8px 10px;
    color: var(--link);
    font-size: 13px;
    cursor: pointer;
}
.pos-gap.selected {
    background: var(--secondary-bg);
    border-style: solid;
    border-color: var(--link);
    color: var(--text);
}
.pos-existing {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 6px 8px;
    background: var(--secondary-bg);
    border-radius: 6px;
    font-size: 13px;
}
.pos-existing .pos-idx { color: var(--hint); }
.pos-existing .pos-title { font-weight: 500; flex: 1; }
.pos-existing .pos-authors { font-size: 11px; color: var(--hint); }

.submit-row {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.filter-bar .f-authors-link {
    grid-column: 1 / -1;
    text-align: center;
    padding: 8px;
    color: var(--link);
    font-size: 13px;
    text-decoration: none;
}
.filter-bar .f-authors-link:hover { text-decoration: underline; }

/* Stage 5E — hidden admin page for color back-fill. Reuses .job-status from add. */
.admin-colors-page {
    padding: 16px;
    max-width: 720px;
    margin: 0 auto;
}
.admin-colors-page h2 {
    font-size: 18px;
    margin: 0 0 12px;
}
.admin-colors-page .hint {
    color: var(--hint);
    font-size: 13px;
    margin: 0 0 16px;
    line-height: 1.5;
}
.admin-colors-page .admin-actions {
    margin: 0 0 16px;
}
.admin-colors-page .admin-status {
    margin: 0 0 16px;
}
.admin-colors-page .admin-error {
    color: var(--destructive);
    font-size: 14px;
    margin-top: 12px;
}
.admin-colors-page .admin-success {
    color: var(--link);
    font-size: 14px;
    margin-top: 12px;
}

/* ============================================================
   Stage 5F — SVG cabinet schema (parametric + rendered overlay)
   ============================================================ */

.cabinet-canvas-wrap {
    margin-top: 16px;
}
.cabinet-canvas {
    position: relative;
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    background: var(--secondary-bg);
    border-radius: 8px;
    overflow: hidden;
}
.cabinet-canvas.with-background {
    background: transparent;
}
.cabinet-canvas .cabinet-bg {
    display: block;
    width: 100%;
    height: auto;
}
.cabinet-canvas .cabinet-svg {
    display: block;
    width: 100%;
    height: auto;
    color: var(--text);
}
/* Rendered mode overlays the SVG on top of the bg image. */
.cabinet-canvas.with-background .cabinet-svg-overlay {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}
.cabinet-canvas .spine {
    /* Subtle stroke between spines so adjacent books don't blur into one rect. */
    stroke: rgba(0, 0, 0, 0.18);
    stroke-width: 0.5;
}
.cabinet-canvas .spine.highlighted {
    /* Stage 5C colour scheme reused via @keyframes blinkHighlight. */
    stroke: #FFB300;
    stroke-width: 3;
}
.cabinet-canvas .spine.blink {
    animation: blinkHighlight 0.8s ease-in-out 3;
}
/* Stage 5F.1 — decorative SVG nodes that must not steal clicks from the
   parent <g data-book-id="..."> hit target. */
.cabinet-canvas .spine-label,
.cabinet-canvas .spine-edge,
.cabinet-canvas .shelf-number,
.cabinet-canvas .shelf-empty {
    pointer-events: none;
    user-select: none;
}

.row-tabs-container {
    margin: 12px 0 4px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.row-tabs {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    font-size: 12px;
}
.row-tabs-label {
    color: var(--hint);
    flex-shrink: 0;
}
.row-tabs-buttons {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}
.row-tab {
    background: var(--secondary-bg);
    color: var(--text);
    border: 1px solid var(--separator);
    border-radius: 12px;
    padding: 4px 10px;
    font-size: 12px;
    cursor: pointer;
}
.row-tab.active {
    background: var(--link);
    color: #fff;
    border-color: var(--link);
}