/* My Sets - Styles for user's personal study sets */
.my-sets-container {
    animation: fadeIn var(--transition-speed);
    max-width: none;
    width: 100%;
}

/* Folder Management */
.create-folder-btn-content {
    margin-bottom: var(--spacing-md);
}

/* Folders table - Full width layout */
.folders-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: 0;
    table-layout: fixed;
    grid-column: 1 / -1;
}

/* Table headers - consistent styling */
.folders-table th {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 600;
    border-bottom: 1px solid var(--color-border);
    height: 50px;
    font-size: var(--font-size-md);
    vertical-align: middle;
}

/* Column width definitions - using percentages for predictable layout */
.folders-table th:nth-child(1),
.folders-table td:nth-child(1) {
    width: 8%;
    text-align: center;
}

.folders-table th:nth-child(2),
.folders-table td:nth-child(2) {
    width: 42%;
    text-align: left;
}

.folders-table th:nth-child(3),
.folders-table td:nth-child(3) {
    width: 25%;
    text-align: center;
}

.folders-table th:nth-child(4),
.folders-table td:nth-child(4) {
    width: 25%;
    text-align: center;
}

/* Table cells - consistent styling */
.folders-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-secondary);
    height: 50px;
    vertical-align: middle;
    font-size: var(--font-size-md);
}

/* Row states */
.folder-main-row {
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.folder-main-row:hover {
    background: rgba(255, 255, 255, 0.05);
}

.folder-main-row.expanded {
    background: rgba(255, 255, 255, 0.08);
}

/* Cell-specific styling */
.folder-expand-icon {
    color: var(--color-secondary);
    font-size: var(--font-size-md);
    transition: transform 0.2s ease;
    user-select: none;
}

.folder-name-cell {
    font-weight: 500;
    font-size: var(--font-size-lg);
}

.folder-count-cell {
    color: #999;
}

.folder-actions-cell .btn {
    margin: 0 var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.folder-set-row {
    background: rgba(255, 255, 255, 0.02);
}

.folder-set-row td {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    height: 45px;
}

.folder-set-name {
    color: var(--color-secondary);
    font-size: var(--font-size-md);
    font-weight: 400;
    padding-left: var(--spacing-xl);
}

.folder-set-actions {
    text-align: center;
}

.folder-set-actions .btn {
    margin: 0 var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.btn-xs {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.empty-folder {
    text-align: center;
    padding: var(--spacing-xl);
    color: #999;
    font-style: italic;
}

/* Responsive design for folders table */
@media (max-width: 768px) {
    .folders-table th:nth-child(3),
    .folders-table td.folder-count-cell {
        display: none;
    }
    
    .folder-actions-cell .btn {
        margin: 0 2px;
        padding: 4px 8px;
        font-size: 12px;
    }
    
    .folders-table th:last-child,
    .folders-table td.folder-actions-cell {
        width: 120px;
    }
}

.btn-danger {
    background: #dc3545;
    color: white;
    border: 1px solid #dc3545;
}

.btn-danger:hover {
    background: #c82333;
    border-color: #c82333;
}

.btn-danger-outline {
    background: transparent;
    color: #f44336;
    border: 1px solid #f44336;
}

.btn-danger-outline:hover {
    background: rgba(244, 67, 54, 0.12);
}

/* Modal styles for folder creation */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

.modal-content {
    background: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    min-width: 400px;
    max-width: 90vw;
    animation: slideIn 0.3s ease;
}

.modal-content--narrow {
    min-width: 0;
    width: 280px;
    max-width: 45vw;
}

.modal-title {
    color: var(--color-secondary);
    margin: 0 0 var(--spacing-lg) 0;
    font-size: var(--font-size-xl);
}

.modal-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    justify-content: flex-end;
}

.modal-buttons .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Rename folder modal */
.rename-folder-field {
    margin: var(--spacing-md) 0 var(--spacing-xs);
}

.rename-folder-input {
    width: 100%;
    box-sizing: border-box;
}

.rename-folder-error,
.modal-input-error {
    font-size: var(--font-size-sm);
    color: var(--color-danger, #ef4444);
    margin-bottom: var(--spacing-sm);
}

/* Folder selection modal */
.folder-selection-list {
    max-height: 300px;
    overflow-y: auto;
    margin: var(--spacing-md) 0;
}

.folder-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
}

.folder-option:hover {
    background: rgba(255, 255, 255, 0.05);
}

.folder-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-secondary);
    cursor: pointer;
}

.folder-option label {
    color: var(--color-secondary);
    font-size: var(--font-size-md);
    cursor: pointer;
    flex: 1;
}

.my-sets-header {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.my-sets-header .search-input {
    flex: 1;
    max-width: 600px;
    padding: var(--spacing-md);
}

.results-counter {
    color: var(--color-secondary);
    font-size: var(--font-size-md);
    font-weight: 500;
    white-space: nowrap;
    min-width: 100px;
}

.separator {
    width: 100%;
    height: 1px;
    background-color: var(--color-secondary);
    margin-bottom: var(--spacing-xl);
}

.sets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.sets-grid--block {
    display: block !important;
}

.sets-folder-section {
    margin-bottom: var(--spacing-xl, 32px);
}

.sets-folder-section:last-child {
    margin-bottom: 0;
}

.sets-folder-heading {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-secondary);
    margin: 0 0 var(--spacing-md) 0;
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
    text-align: left;
}

.sets-subgrid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.set-card {
    background-color: var(--color-active);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-speed);
    display: flex;
    flex-direction: column;
}

.set-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-secondary);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.1);
}

.set-card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
}

.set-card-creator {
    font-size: var(--font-size-sm);
    color: #999999;
    margin-bottom: var(--spacing-sm);
}

.set-card-count {
    font-size: var(--font-size-md);
    color: #cccccc;
    margin-bottom: var(--spacing-xs);
}

.set-card-date {
    font-size: var(--font-size-sm);
    color: #999999;
}

.set-card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.set-card-actions .btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* Delete Set spans the full width below Edit / Study */
.set-card-actions .btn-danger-outline {
    flex: 0 0 100%;
}

/* Pagination Section */
.pagination-container {
    margin: var(--spacing-lg) 0;
}

.pagination-tabs {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.pagination-tab {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-secondary);
    font-size: var(--font-size-md);
    cursor: pointer;
    transition: all var(--transition-speed);
}

.pagination-tab:hover {
    border-color: var(--color-secondary);
    background-color: rgba(255, 255, 255, 0.05);
}

.pagination-tab.active:hover {
    background-color: rgba(255, 255, 255, 0.07);
    border-color: #ffffff;
}

.pagination-tab.active {
    background-color: transparent;
    color: #ffffff;
    border-color: #ffffff;
    box-shadow: 0 0 0 1px #ffffff;
}

.pagination-divider {
    height: 1px;
    background-color: var(--color-border);
    margin: var(--spacing-md) 0;
}

.recently-viewed-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.recently-viewed-filter-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.recently-viewed-filter-dropdown {
    min-width: 150px;
}

.control-label {
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
    white-space: nowrap;
}

.limit-dropdown {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

.limit-dropdown:focus {
    outline: none;
    border-color: var(--color-secondary);
}

.empty-state {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    text-align: center;
}

.empty-state-content h3 {
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
}

.empty-state-content p {
    color: #999;
    font-size: var(--font-size-md);
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .pagination-tabs {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .pagination-tab {
        padding: var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
    
    .recently-viewed-controls {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl);
    color: #999999;
    font-size: var(--font-size-md);
}

/* ── Pagination controls ─────────────────────────────────────── */
.page-nav-wrapper {
    display: flex;
    justify-content: center;
    padding: var(--spacing-lg) 0 var(--spacing-xl);
}

.page-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.page-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-sm);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-secondary);
    font-size: var(--font-size-md);
    cursor: pointer;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
    line-height: 1;
}

.page-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--color-secondary);
}

.page-btn:disabled {
    opacity: 0.35;
    cursor: default;
}

.page-btn-active {
    background: var(--color-secondary);
    color: var(--color-primary);
    border-color: var(--color-secondary);
    font-weight: 700;
    cursor: default;
}

.page-prev,
.page-next {
    font-size: var(--font-size-lg);
}

.page-ellipsis {
    color: #888;
    font-size: var(--font-size-md);
    padding: 0 4px;
    user-select: none;
}

.my-sets-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.my-sets-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.my-set-item {
    background-color: var(--color-active);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: border-color var(--transition-speed);
}

.my-set-item:hover {
    border-color: var(--color-secondary);
}

.my-set-info {
    flex: 1;
}

.my-set-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.my-set-meta {
    color: #999999;
    font-size: var(--font-size-sm);
}

.my-set-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-icon {
    padding: var(--spacing-sm);
    color: var(--color-secondary);
    transition: opacity var(--transition-speed);
}

.btn-icon:hover {
    opacity: 0.7;
}

/* ── Exam date badge on set cards ─────────────────────────────────────────── */

.exam-date-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border: none;
    border-top: 1px solid var(--color-border);
    width: 100%;
    box-sizing: border-box;
}

.exam-badge--upcoming {
    background: rgba(33, 150, 243, 0.12);
    border-color: rgba(33, 150, 243, 0.35);
    color: #90caf9;
}

.exam-badge--week {
    background: rgba(255, 152, 0, 0.12);
    border-color: rgba(255, 152, 0, 0.35);
    color: #ffcc80;
}

.exam-badge--soon {
    background: rgba(255, 87, 34, 0.12);
    border-color: rgba(255, 87, 34, 0.35);
    color: #ffab91;
}

.exam-badge--critical {
    background: rgba(229, 57, 53, 0.15);
    border-color: rgba(229, 57, 53, 0.5);
    color: #ef9a9a;
    animation: pulse-exam 1.5s ease-in-out infinite;
}

.exam-badge--none {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.08);
    color: #555;
}

.exam-badge--completed {
    background: rgba(76, 175, 80, 0.1);
    border-color: rgba(76, 175, 80, 0.3);
    color: #a5d6a7;
}

@keyframes pulse-exam {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.65; }
}

/* ── Combine Set modal ───────────────────────────────────────────────────── */
.combine-modal-content {
    min-width: 360px;
    max-width: min(480px, 92vw);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.combine-modal-subtitle {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
    margin: calc(-1 * var(--spacing-sm)) 0 0;
}

.combine-modal-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.combine-modal-select {
    width: 100%;
    padding: 8px 10px;
    background: var(--color-active, #1e1e1e);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

.combine-modal-select:focus {
    outline: none;
    border-color: var(--color-accent, #2196f3);
}

.combine-section-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 220px;
    overflow-y: auto;
    padding-right: 2px;
}

.combine-section-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background var(--transition-speed);
    font-size: var(--font-size-sm);
    color: var(--color-secondary);
}

.combine-section-row:hover {
    background: rgba(255, 255, 255, 0.08);
}

.combine-section-cb {
    flex-shrink: 0;
    cursor: pointer;
    accent-color: var(--color-accent, #2196f3);
}

.combine-section-count {
    margin-left: auto;
    font-size: var(--font-size-xs, 11px);
    color: rgba(255, 255, 255, 0.4);
    white-space: nowrap;
}

.combine-radio-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.combine-radio-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--font-size-sm);
    color: var(--color-secondary);
    cursor: pointer;
}

.combine-radio-row input[type="radio"] {
    accent-color: var(--color-accent, #2196f3);
    cursor: pointer;
}

.combine-validation-msg {
    font-size: var(--font-size-sm);
    color: #ef4444;
    margin: 0;
}