/* Case picker overlay — main app case selection */
.case-picker-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 1250;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
    padding: 1rem;
}

.case-picker-overlay.open {
    display: flex;
    opacity: 1;
}

.case-picker-modal {
    background: #fff;
    border-radius: 10px;
    width: min(1200px, calc(100vw - 2rem));
    max-height: calc(100vh - 4rem);
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.13);
    transform: translateY(12px);
    transition: transform 0.2s;
    overflow: hidden;
    border: 1px solid #e0e4ea;
}

.case-picker-overlay.open .case-picker-modal {
    transform: translateY(0);
}

.case-picker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem 0.85rem;
    border-bottom: 2px solid var(--primary-color, #0056b3);
    flex-shrink: 0;
}

.case-picker-header h2 {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-color, #0056b3);
}

.case-picker-close-btn {
    background: none;
    border: none;
    border-radius: 4px;
    color: var(--text-secondary, #5f6368);
    cursor: pointer;
    padding: 0.25rem;
}

.case-picker-close-btn:hover {
    background: #f1f3f4;
}

.case-picker-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid #e0e4ea;
    flex-shrink: 0;
    align-items: flex-end;
}

.case-picker-filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 120px;
}

.case-picker-filter-group.search-group {
    flex: 1;
    min-width: 180px;
}

.case-picker-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #64748b;
}

.case-picker-select,
.case-picker-search {
    font-size: 0.875rem;
    padding: 0.4rem 0.6rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    background: #fff;
}

.case-picker-search-wrap {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    padding: 0 0.5rem;
    background: #fff;
}

.case-picker-search-wrap input {
    border: none;
    outline: none;
    flex: 1;
    padding: 0.4rem 0;
    font-size: 0.875rem;
    min-width: 0;
}

.case-picker-body {
    overflow: auto;
    flex: 1;
    min-height: 200px;
}

.case-picker-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 3rem 1.5rem;
    color: var(--text-secondary, #5f6368);
    font-size: 0.9rem;
}

.case-picker-table-wrap {
    overflow: auto;
}

.case-picker-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

.case-picker-table th,
.case-picker-table td {
    padding: 0.6rem 0.85rem;
    text-align: left;
    border-bottom: 1px solid #e8eaed;
    vertical-align: middle;
}

.case-picker-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #495057;
    white-space: nowrap;
    position: sticky;
    top: 0;
    z-index: 1;
}

.case-picker-table th.sortable {
    cursor: pointer;
    user-select: none;
}

.case-picker-table th.sortable:hover {
    background: #eef1f5;
}

.case-picker-table tbody tr {
    cursor: pointer;
}

.case-picker-table tbody tr:hover {
    background: #f0f7ff;
}

.case-picker-case-name {
    font-weight: 600;
    color: var(--primary-color, #0056b3);
}

.case-picker-course-badge {
    display: inline-block;
    font-size: 0.7rem;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    background: #e8f0fe;
    color: #1a56db;
    margin: 0.1rem 0.15rem 0.1rem 0;
}

.case-picker-desc {
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: #64748b;
}

/* Learning context bar in tools panel */
@media (min-width: 901px) {
    #tools-panel > .panel-content-collapsible > .panel-section {
        padding-top: 0.8rem;
        padding-bottom: 0;
    }

    #tools-panel .tab-nav {
        padding-top: 0.375rem;
    }
}

#learning-context-bar {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-bottom: 1rem;
    padding: 0 0 0.875rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    font-size: 0.875rem;
    line-height: 1.4;
}

.learning-context-btn {
    display: grid;
    grid-template-columns: max-content 1fr;
    align-items: start;
    gap: 0.5rem 0.75rem;
    width: 100%;
    padding: 0.2rem 0.15rem;
    border: none;
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    font: inherit;
    text-align: left;
    transition: background 0.12s ease;
}

.learning-context-btn:hover:not(:disabled) {
    background: rgba(0, 86, 179, 0.04);
}

.learning-context-btn:focus-visible {
    outline: 2px solid rgba(0, 86, 179, 0.35);
    outline-offset: 1px;
}

.learning-context-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.learning-context-btn .ctx-label {
    font-size: inherit;
    font-weight: 600;
    color: var(--primary-color, #0056b3);
    line-height: inherit;
    white-space: nowrap;
    transition: color 0.12s ease, text-decoration-color 0.12s ease;
}

.learning-context-btn .ctx-value {
    min-width: 0;
}

.learning-context-btn .ctx-text {
    display: block;
    font-size: inherit;
    font-weight: 500;
    color: #4b5563;
    line-height: inherit;
    white-space: normal;
    word-break: break-word;
    transition: color 0.12s ease;
}

.learning-context-btn:hover:not(:disabled) .ctx-label {
    text-decoration: underline;
    text-underline-offset: 2px;
}

.learning-context-btn:hover:not(:disabled) .ctx-text {
    color: #374151;
}

.learning-context-btn:disabled .ctx-label {
    color: #9ca3af;
    text-decoration: none;
}

.learning-context-btn:disabled .ctx-text {
    color: #9ca3af;
}

#case-selection-container {
    display: none;
}

/* ── Mobile: card layout for case list (desktop table unchanged) ── */
@media (max-width: 768px) {
    .case-picker-overlay {
        padding: 0;
        align-items: stretch;
    }

    .case-picker-modal {
        width: 100%;
        max-height: 100dvh;
        border-radius: 0;
        border-left: none;
        border-right: none;
    }

    .case-picker-header {
        padding: 0.85rem 1rem;
    }

    .case-picker-header h2 {
        font-size: 1.05rem;
    }

    .case-picker-close-btn {
        padding: 0.5rem;
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .case-picker-filters {
        flex-direction: column;
        align-items: stretch;
        gap: 0.65rem;
        padding: 0.75rem 1rem;
    }

    .case-picker-filter-group,
    .case-picker-filter-group.search-group {
        width: 100%;
        min-width: 0;
        flex: none;
    }

    .case-picker-label {
        font-size: 0.75rem;
    }

    .case-picker-select,
    .case-picker-search-wrap input {
        font-size: 16px;
        padding: 0.55rem 0.65rem;
    }

    .case-picker-search-wrap {
        padding: 0 0.65rem;
    }

    .case-picker-body {
        min-height: 0;
        -webkit-overflow-scrolling: touch;
    }

    .case-picker-table-wrap {
        overflow: visible;
    }

    .case-picker-table {
        font-size: 0.9375rem;
    }

    .case-picker-table thead {
        display: none;
    }

    .case-picker-table tbody tr {
        display: block;
        margin: 0.65rem 0.75rem;
        padding: 0.25rem 0;
        border: 1px solid #e2e8f0;
        border-radius: 10px;
        background: #fff;
        box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
    }

    .case-picker-table tbody tr:hover {
        background: #f8fbff;
        border-color: #bfdbfe;
    }

    .case-picker-table td {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 0.75rem;
        padding: 0.55rem 1rem;
        border-bottom: none;
        text-align: right;
    }

    .case-picker-table td:has(.case-picker-desc) {
        flex-direction: column;
        align-items: stretch;
        gap: 0.35rem;
        text-align: left;
    }

    .case-picker-table td:has(.case-picker-course-badge) {
        flex-wrap: wrap;
    }

    .case-picker-table td::before {
        content: attr(data-label);
        font-size: 0.7rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.03em;
        color: #64748b;
        text-align: left;
        flex: 0 0 38%;
        max-width: 9rem;
        padding-top: 0.1rem;
    }

    .case-picker-table td.case-picker-row-num {
        display: none;
    }

    /* Case name: prominent card title, no field label */
    .case-picker-table td[data-label]:nth-child(2) {
        display: block;
        text-align: left;
        padding: 0.75rem 1rem 0.5rem;
        border-bottom: 1px solid #e8eaed;
        margin-bottom: 0.15rem;
    }

    .case-picker-table td[data-label]:nth-child(2)::before {
        display: none;
    }

    .case-picker-table td[data-label]:nth-child(2) .case-picker-case-name {
        font-size: 1rem;
        line-height: 1.35;
        word-break: break-word;
    }

    .case-picker-desc {
        max-width: none;
        white-space: normal;
        text-align: left;
        line-height: 1.4;
    }

    .case-picker-course-badge {
        font-size: 0.75rem;
        padding: 0.2rem 0.5rem;
    }

    /* Empty / no-match state row */
    .case-picker-table tbody tr:only-child td[colspan] {
        display: block;
        text-align: center;
        padding: 2rem 1rem;
    }

    .case-picker-table tbody tr:only-child td[colspan]::before {
        display: none;
    }

    /* Learning context bar in tools panel */
    .learning-context-btn {
        grid-template-columns: max-content 1fr;
        padding: 0.55rem 0.25rem;
        min-height: 44px;
    }

    .learning-context-btn .ctx-label {
        font-size: 0.8rem;
    }

    .learning-context-btn .ctx-text {
        line-height: 1.35;
    }
}