/* ================================================================
   Library · 教材讲义库专用样式
   延续主样式设计语言：深墨蓝 × 温暖纸白 × 电子蓝
   ================================================================ */

/* ---------- Library Layout ---------- */
.lib-container {
    display: flex;
    flex-direction: column;
    gap: var(--s-5);
    min-height: 60vh;
}

/* ---------- Tag Filter Bar ---------- */
.lib-filters {
    display: flex;
    align-items: center;
    gap: var(--s-3);
    flex-wrap: wrap;
    padding: var(--s-3) var(--s-4);
    background: var(--c-paper-2);
    border: 1px solid var(--c-line);
    border-radius: var(--r-lg);
    box-shadow: var(--sh-1);
}
.lib-filter-group {
    display: flex;
    align-items: center;
    gap: var(--s-2);
}
.lib-filter-label {
    font-size: 10.5px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--c-ink-4);
    font-family: var(--f-mono);
    margin-right: 4px;
}
.lib-tag {
    display: inline-flex;
    align-items: center;
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid var(--c-line);
    background: var(--c-paper);
    color: var(--c-ink-3);
    cursor: pointer;
    transition: all 180ms;
    user-select: none;
}
.lib-tag:hover {
    border-color: var(--c-primary-line);
    color: var(--c-primary);
    background: var(--c-primary-soft);
}
.lib-tag.is-active {
    background: var(--c-primary);
    color: #fff;
    border-color: var(--c-primary);
    box-shadow: 0 2px 6px rgba(30, 136, 229, 0.25);
}

/* ---------- Breadcrumb ---------- */
.lib-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    color: var(--c-ink-3);
    flex-wrap: wrap;
}
.lib-breadcrumb a {
    color: var(--c-primary);
    cursor: pointer;
    transition: color 150ms;
}
.lib-breadcrumb a:hover { color: var(--c-primary-700); text-decoration: underline; }
.lib-breadcrumb .sep { color: var(--c-ink-4); font-size: 11px; }

/* ---------- Folder Grid ---------- */
.lib-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--s-4);
    flex-wrap: wrap;
}
.lib-toolbar-left {
    display: flex;
    align-items: center;
    gap: var(--s-3);
}
.lib-toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--s-3);
}
.lib-zoom-slider {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--c-ink-4);
}
.lib-zoom-slider input[type="range"] {
    width: 80px;
    accent-color: var(--c-primary);
}

.lib-folder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(var(--lib-card-w, 180px), 1fr));
    gap: var(--s-4);
}
.lib-folder-card {
    background: var(--c-paper-2);
    border: 1px solid var(--c-line);
    border-radius: var(--r-lg);
    padding: var(--s-5) var(--s-4);
    text-align: center;
    cursor: pointer;
    transition: all 260ms cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--sh-1);
}
.lib-folder-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
    opacity: 0;
    transition: opacity 200ms;
}
.lib-folder-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--sh-2);
    border-color: var(--c-primary-line);
}
.lib-folder-card:hover::before { opacity: 1; }
.lib-folder-card.is-dragover {
    border-color: var(--c-primary);
    background: var(--c-primary-soft);
    box-shadow: var(--sh-glow);
}
.lib-folder-icon {
    font-size: 36px;
    margin-bottom: var(--s-3);
    display: block;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}
.lib-folder-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--c-ink);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: 4px;
}
.lib-folder-meta {
    font-size: 11px;
    color: var(--c-ink-4);
    font-family: var(--f-mono);
}
.lib-folder-actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 180ms;
}
.lib-folder-card:hover .lib-folder-actions { opacity: 1; }
.lib-folder-actions button {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1px solid var(--c-line);
    background: var(--c-paper-2);
    color: var(--c-ink-3);
    font-size: 12px;
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: all 150ms;
}
.lib-folder-actions button:hover {
    background: var(--c-primary);
    color: #fff;
    border-color: var(--c-primary);
}
.lib-folder-actions button.btn-del:hover {
    background: var(--c-danger);
    border-color: var(--c-danger);
}

/* ---------- Document List ---------- */
.lib-doc-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.lib-doc-item {
    display: grid;
    grid-template-columns: 40px 1fr 100px 80px 100px 140px;
    align-items: center;
    gap: var(--s-3);
    padding: var(--s-3) var(--s-4);
    background: var(--c-paper-2);
    border: 1px solid var(--c-line);
    border-radius: var(--r-md);
    transition: all 180ms;
    cursor: pointer;
}
.lib-doc-item:hover {
    border-color: var(--c-primary-line);
    background: var(--c-primary-soft);
    transform: translateX(2px);
}
.lib-doc-item.is-dragging {
    opacity: 0.5;
    border-style: dashed;
}
.lib-doc-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--r-md);
    display: grid;
    place-items: center;
    font-size: 18px;
    background: var(--c-paper-3);
}
.lib-doc-info { min-width: 0; }
.lib-doc-title {
    font-size: 13.5px;
    font-weight: 500;
    color: var(--c-ink);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.lib-doc-sub {
    font-size: 11px;
    color: var(--c-ink-4);
    margin-top: 2px;
    font-family: var(--f-mono);
}
.lib-doc-status {
    font-size: 11px;
    font-family: var(--f-mono);
    padding: 3px 8px;
    border-radius: var(--r-sm);
    text-align: center;
}
.lib-doc-status.is-ready { background: rgba(22,163,74,0.1); color: #15803D; border: 1px solid rgba(22,163,74,0.22); }
.lib-doc-status.is-processing { background: rgba(245,158,11,0.1); color: #B45309; border: 1px solid rgba(245,158,11,0.22); }
.lib-doc-status.is-error { background: rgba(239,68,68,0.08); color: #B91C1C; border: 1px solid rgba(239,68,68,0.2); }
.lib-doc-status.is-queued { background: rgba(30,136,229,0.08); color: #1565C0; border: 1px solid rgba(30,136,229,0.2); }
.lib-doc-time {
    font-size: 11px;
    color: var(--c-ink-4);
    font-family: var(--f-mono);
}
.lib-doc-actions {
    display: flex;
    gap: 4px;
    justify-content: flex-end;
}

/* ---------- Upload ---------- */
.lib-upload-zone {
    border: 2px dashed var(--c-line-strong);
    border-radius: var(--r-lg);
    padding: var(--s-10) var(--s-6);
    text-align: center;
    background: var(--c-paper-2);
    transition: all 200ms;
    cursor: pointer;
}
.lib-upload-zone:hover,
.lib-upload-zone.is-dragover {
    border-color: var(--c-primary);
    background: var(--c-primary-soft);
}
.lib-upload-zone .upload-icon {
    font-size: 42px;
    margin-bottom: var(--s-3);
    display: block;
}
.lib-upload-zone .upload-text {
    font-size: 14px;
    color: var(--c-ink-2);
    margin-bottom: var(--s-2);
}
.lib-upload-zone .upload-hint {
    font-size: 12px;
    color: var(--c-ink-4);
}
.lib-progress-list {
    display: flex;
    flex-direction: column;
    gap: var(--s-3);
    margin-top: var(--s-4);
}
.lib-progress-item {
    display: grid;
    grid-template-columns: 1fr 60px;
    gap: var(--s-3);
    align-items: center;
    padding: var(--s-3) var(--s-4);
    background: var(--c-paper-2);
    border: 1px solid var(--c-line);
    border-radius: var(--r-md);
}
.lib-progress-name {
    font-size: 12.5px;
    color: var(--c-ink-2);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.lib-progress-bar {
    height: 6px;
    background: var(--c-paper-3);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 6px;
}
.lib-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--c-primary), #4EA8F5);
    border-radius: 3px;
    transition: width 200ms ease;
}
.lib-progress-pct {
    font-size: 11px;
    font-family: var(--f-mono);
    color: var(--c-ink-3);
    text-align: right;
}

/* ---------- PDF Reader ---------- */
.lib-reader {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 0;
    height: calc(100vh - var(--topbar-h) - 120px);
    min-height: 500px;
    background: var(--c-paper-2);
    border: 1px solid var(--c-line);
    border-radius: var(--r-lg);
    overflow: hidden;
    box-shadow: var(--sh-2);
}
.lib-reader.is-fullscreen {
    position: fixed;
    inset: 0;
    z-index: 9999;
    border-radius: 0;
    height: 100vh;
}
.lib-reader-sidebar {
    background: var(--c-side);
    color: var(--c-side-ink);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-right: 1px solid rgba(0,0,0,0.3);
}
.lib-reader-sidebar-head {
    padding: var(--s-4);
    border-bottom: 1px solid var(--c-side-line);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.lib-reader-sidebar-head h4 {
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-side-ink-dim);
    font-family: var(--f-mono);
}
.lib-reader-toc {
    flex: 1;
    overflow-y: auto;
    padding: var(--s-3);
}
.lib-reader-toc-item {
    padding: 8px 12px;
    border-radius: var(--r-sm);
    font-size: 12.5px;
    color: var(--c-side-ink);
    cursor: pointer;
    transition: all 150ms;
    margin-bottom: 2px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.lib-reader-toc-item:hover {
    background: rgba(255,255,255,0.05);
    color: var(--c-ink-inverse);
}
.lib-reader-toc-item.is-active {
    background: rgba(30,136,229,0.18);
    color: var(--c-ink-inverse);
    border-left: 2px solid var(--c-primary);
}
.lib-reader-toc-item .toc-type {
    font-size: 9px;
    font-family: var(--f-mono);
    letter-spacing: 0.08em;
    padding: 2px 5px;
    border-radius: 3px;
    background: rgba(255,255,255,0.06);
    color: var(--c-side-ink-dim);
    flex-shrink: 0;
}
.lib-reader-toc-item .toc-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.lib-reader-main {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #2a2a2a;
}
.lib-reader-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--s-2) var(--s-4);
    background: var(--c-paper-2);
    border-bottom: 1px solid var(--c-line);
    gap: var(--s-3);
    flex-shrink: 0;
}
.lib-reader-toolbar-group {
    display: flex;
    align-items: center;
    gap: var(--s-2);
}
.lib-reader-toolbar button {
    width: 30px;
    height: 30px;
    border-radius: var(--r-sm);
    border: 1px solid var(--c-line);
    background: var(--c-paper);
    color: var(--c-ink-2);
    font-size: 13px;
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: all 150ms;
}
.lib-reader-toolbar button:hover {
    background: var(--c-primary-soft);
    border-color: var(--c-primary-line);
    color: var(--c-primary);
}
.lib-reader-toolbar button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.lib-reader-page-info {
    font-size: 12px;
    font-family: var(--f-mono);
    color: var(--c-ink-3);
    display: flex;
    align-items: center;
    gap: 6px;
}
.lib-reader-page-info input {
    width: 44px;
    text-align: center;
    padding: 4px 6px;
    border: 1px solid var(--c-line);
    border-radius: var(--r-sm);
    font-family: var(--f-mono);
    font-size: 12px;
    background: var(--c-paper);
}
.lib-reader-canvas-wrap {
    flex: 1;
    overflow: auto;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: var(--s-4);
}
.lib-reader-canvas-wrap canvas {
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    background: #fff;
}
.lib-reader-highlight {
    position: absolute;
    border: 2px solid rgba(30,136,229,0.6);
    background: rgba(30,136,229,0.12);
    border-radius: 2px;
    pointer-events: none;
    animation: highlight-pulse 1.5s ease-in-out infinite;
}
@keyframes highlight-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ---------- Module Editor ---------- */
.lib-modules-panel {
    display: flex;
    flex-direction: column;
    gap: var(--s-4);
}
.lib-module-tree {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.lib-module-item {
    display: grid;
    grid-template-columns: 24px 80px 1fr 100px 80px;
    align-items: center;
    gap: var(--s-3);
    padding: 10px var(--s-4);
    background: var(--c-paper-2);
    border: 1px solid var(--c-line);
    border-radius: var(--r-md);
    transition: all 150ms;
    font-size: 13px;
}
.lib-module-item:hover {
    border-color: var(--c-primary-line);
    background: var(--c-primary-soft);
}
.lib-module-item.is-protected {
    border-left: 3px solid var(--c-accent);
}
.lib-module-indent {
    display: flex;
    align-items: center;
    gap: 4px;
}
.lib-module-toggle {
    width: 18px;
    height: 18px;
    border-radius: 3px;
    border: none;
    background: transparent;
    color: var(--c-ink-4);
    cursor: pointer;
    display: grid;
    place-items: center;
    font-size: 10px;
    transition: all 150ms;
}
.lib-module-toggle:hover { background: var(--c-paper-3); color: var(--c-ink); }
.lib-module-type {
    font-size: 10px;
    font-family: var(--f-mono);
    letter-spacing: 0.06em;
    padding: 3px 7px;
    border-radius: var(--r-sm);
    background: var(--c-paper-3);
    color: var(--c-ink-3);
    text-align: center;
}
.lib-module-title {
    font-weight: 500;
    color: var(--c-ink);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.lib-module-pages {
    font-size: 11px;
    font-family: var(--f-mono);
    color: var(--c-ink-4);
}
.lib-module-protected {
    font-size: 14px;
    color: var(--c-accent);
}

/* ---------- Keys Management ---------- */
.lib-keys-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--s-4);
}
.lib-key-card {
    background: var(--c-paper-2);
    border: 1px solid var(--c-line);
    border-radius: var(--r-lg);
    padding: var(--s-5);
    transition: all 200ms;
    box-shadow: var(--sh-1);
}
.lib-key-card:hover {
    box-shadow: var(--sh-2);
    border-color: var(--c-primary-line);
}
.lib-key-card.is-revoked {
    opacity: 0.6;
    border-color: rgba(239,68,68,0.3);
}
.lib-key-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--c-ink);
    margin-bottom: var(--s-2);
}
.lib-key-meta {
    font-size: 11.5px;
    color: var(--c-ink-4);
    font-family: var(--f-mono);
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.lib-key-scopes {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    margin-top: var(--s-3);
}
.lib-key-scope {
    font-size: 10px;
    font-family: var(--f-mono);
    padding: 2px 7px;
    border-radius: 999px;
    background: var(--c-primary-soft);
    color: var(--c-primary-600);
    border: 1px solid var(--c-primary-line);
}
.lib-key-actions {
    display: flex;
    gap: var(--s-2);
    margin-top: var(--s-4);
    padding-top: var(--s-3);
    border-top: 1px solid var(--c-line);
}

/* Secret reveal */
.lib-secret-reveal {
    background: var(--c-side);
    border-radius: var(--r-md);
    padding: var(--s-4);
    margin-top: var(--s-4);
}
.lib-secret-value {
    font-family: var(--f-mono);
    font-size: 13px;
    color: var(--c-accent);
    word-break: break-all;
    padding: var(--s-3);
    background: rgba(255,255,255,0.04);
    border-radius: var(--r-sm);
    border: 1px solid rgba(255,255,255,0.1);
}
.lib-secret-warn {
    font-size: 11.5px;
    color: #FCA5A5;
    margin-top: var(--s-3);
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ---------- Search Results ---------- */
.lib-search-results {
    display: flex;
    flex-direction: column;
    gap: var(--s-3);
}
.lib-search-item {
    padding: var(--s-4);
    background: var(--c-paper-2);
    border: 1px solid var(--c-line);
    border-radius: var(--r-md);
    cursor: pointer;
    transition: all 180ms;
}
.lib-search-item:hover {
    border-color: var(--c-primary-line);
    background: var(--c-primary-soft);
    transform: translateX(3px);
}
.lib-search-item-title {
    font-size: 13.5px;
    font-weight: 500;
    color: var(--c-ink);
    margin-bottom: 4px;
}
.lib-search-item-snippet {
    font-size: 12px;
    color: var(--c-ink-3);
    line-height: 1.6;
}
.lib-search-item-snippet mark {
    background: rgba(245,158,11,0.2);
    color: var(--c-ink);
    padding: 1px 3px;
    border-radius: 2px;
}
.lib-search-item-meta {
    display: flex;
    gap: var(--s-3);
    margin-top: var(--s-2);
    font-size: 11px;
    color: var(--c-ink-4);
    font-family: var(--f-mono);
}

/* ---------- Empty State ---------- */
.lib-empty {
    text-align: center;
    padding: var(--s-12) var(--s-6);
    color: var(--c-ink-4);
}
.lib-empty-icon {
    font-size: 48px;
    margin-bottom: var(--s-4);
    opacity: 0.5;
}
.lib-empty-text {
    font-size: 14px;
    margin-bottom: var(--s-2);
}
.lib-empty-hint {
    font-size: 12px;
    color: var(--c-ink-4);
}

/* ---------- Loading ---------- */
.lib-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--s-10);
    gap: var(--s-3);
    color: var(--c-ink-4);
    font-size: 13px;
}
.lib-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--c-line);
    border-top-color: var(--c-primary);
    border-radius: 50%;
    animation: spin 600ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Trash ---------- */
.lib-trash-item {
    display: grid;
    grid-template-columns: 36px 1fr 120px 140px;
    align-items: center;
    gap: var(--s-3);
    padding: var(--s-3) var(--s-4);
    background: var(--c-paper-2);
    border: 1px solid var(--c-line);
    border-radius: var(--r-md);
    opacity: 0.8;
}
.lib-trash-item:hover { opacity: 1; border-color: var(--c-primary-line); }

/* ---------- HTML Preview ---------- */
.lib-preview-frame {
    width: 100%;
    min-height: 400px;
    border: 1px solid var(--c-line);
    border-radius: var(--r-md);
    background: #fff;
    resize: vertical;
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
    .lib-reader { grid-template-columns: 1fr; }
    .lib-reader-sidebar { display: none; }
    .lib-doc-item { grid-template-columns: 36px 1fr 80px 100px; }
    .lib-doc-item .lib-doc-time { display: none; }
    .lib-doc-item .lib-doc-pages { display: none; }
}
@media (max-width: 768px) {
    .lib-folder-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
    .lib-keys-grid { grid-template-columns: 1fr; }
}