/* ==========================================================================
   section-shared.css — shared cross-section design-system components.
   (Section-shell refactor Phase 2-Б. See SECTION_SHELL_REFACTOR_PLAN.md and the
   "CSS ownership contract" in design-system.md.)

   Changing anything here affects EVERY section by design: the section
   home/welcome + task-card + task-menu + task-icon system, the question browser,
   and the attempts panel. These are shared even where classes are still
   `reading-*`/`question-*` named for historical reasons — the name does NOT
   imply Reading-only ownership.

   Loaded right after app-shell.css so the cascade is unchanged as rules are
   relocated here from app-shell.css.
   ========================================================================== */

/* ---- Relocated from app-shell.css (Phase 2-Б R1): question browser (shared). ---- */
/* ==========================================================================
   Question browser drawer — shared by Reading and Writing
   Single source of truth for the "Question list" slide-in panel. Both sections
   reuse these generic classes; there are no per-section visual overrides.
   ========================================================================== */

.question-browser-backdrop {
    position: fixed;
    inset: 0;
    z-index: 60;
    background: var(--bg-overlay-subtle);
    opacity: 0;
    transition: opacity var(--question-browser-transition-duration, var(--motion-duration-panel-open)) var(--motion-ease-micro);
}

.question-browser-backdrop.is-open {
    opacity: 1;
}

.question-browser-backdrop[hidden],
.question-browser-drawer[hidden] {
    display: none !important;
}

body.question-browser-open {
    overflow: hidden;
}

.question-browser-drawer {
    position: fixed;
    top: 0;
    right: 0;
    width: min(100%, var(--size-question-browser-width));
    height: 100vh;
    z-index: 61;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    padding: 0;
    gap: 0;
    background: var(--bg-page);
    border-left: var(--border-width-default) solid var(--border-subtle);
    box-shadow: var(--shadow-panel-separator);
    transform: translateX(100%);
    transition:
        transform var(--question-browser-transition-duration, var(--motion-duration-panel-open)) var(--motion-ease-micro),
        box-shadow var(--motion-duration-fast) var(--motion-ease-standard);
    overflow: hidden;
}

.question-browser-drawer.is-open {
    transform: translateX(0);
}

.question-browser-drawer .question-browser-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-12);
    padding: var(--space-18) var(--space-24) var(--space-16);
    border-bottom: var(--border-width-default) solid var(--border-subtle);
}

.question-browser-drawer .question-browser-header h2 {
    margin: 0;
    font-size: var(--font-size-100);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    letter-spacing: var(--tracking-soft-tight);
}

.question-browser-drawer .question-browser-close-button {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition:
        background-color var(--motion-duration-fast) ease,
        color var(--motion-duration-fast) ease;
}

.question-browser-drawer .question-browser-close-button:hover {
    background: var(--warm-gray-soft);
    color: var(--text-secondary);
}

.question-browser-drawer .question-browser-close-button:active {
    background: var(--border-subtle);
    color: var(--text-secondary);
}

.question-browser-drawer .question-browser-close-button-icon,
.question-browser-drawer .question-browser-open-button-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.question-browser-drawer .question-browser-close-button-icon svg {
    width: 15px;
    height: 15px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

.question-browser-drawer .question-browser-context {
    padding: var(--space-14) var(--space-24) 0;
}

.question-browser-drawer .question-browser-task-row {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    margin-bottom: var(--space-14);
}

.question-browser-drawer .question-browser-task-icon {
    width: var(--space-22);
    height: var(--space-22);
    border-radius: var(--space-5);
    border: var(--border-width-default) solid var(--border-subtle);
    background: var(--bg-page);
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.question-browser-drawer .question-browser-task-icon .reading-task-icon-svg {
    width: var(--space-12);
    height: var(--space-12);
}

.question-browser-drawer .question-browser-scope {
    margin: 0;
    font-size: var(--font-size-084375);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.question-browser-drawer .question-browser-meta {
    margin: 0;
    margin-left: auto;
    font-size: var(--font-size-0719);
    color: var(--text-muted);
}

.question-browser-drawer .question-browser-meta:empty {
    display: none;
}

.question-browser-drawer .question-browser-filters {
    width: auto;
    max-width: none;
    padding: 0 var(--space-24) var(--space-14);
    border: 0;
    border-bottom: var(--border-width-default) solid var(--border-subtle);
    border-radius: 0;
    background: transparent;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.question-browser-drawer .question-browser-filter {
    display: inline-flex;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-5) var(--space-10);
    border: var(--border-width-default) solid transparent;
    border-radius: var(--space-6);
    background: transparent;
    color: var(--text-secondary);
    font-size: var(--font-size-078125);
    font-weight: var(--font-weight-regular);
    cursor: pointer;
    transition:
        background-color var(--motion-duration-fast) ease,
        color var(--motion-duration-fast) ease;
}

.question-browser-drawer .question-browser-filter:hover,
.question-browser-drawer .question-browser-filter.active {
    background: var(--warm-gray-soft);
    color: var(--text-primary);
}

.question-browser-drawer .question-browser-filter.active {
    font-weight: var(--font-weight-medium);
}

.question-browser-drawer .question-browser-filter-count {
    font-size: var(--font-size-0719);
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

.question-browser-drawer .question-browser-filter.active .question-browser-filter-count {
    color: var(--text-secondary);
}

.question-browser-drawer .question-browser-status {
    margin: 0;
    color: var(--text-muted);
    font-size: var(--font-size-08125);
}

.question-browser-drawer .question-browser-list-section {
    flex: 1 1 auto;
    min-height: 0;
    overflow: hidden;
}

.question-browser-drawer .question-browser-list {
    list-style: none;
    height: 100%;
    margin: 0;
    padding: var(--space-8) var(--space-12);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    overflow-y: auto;
    scrollbar-gutter: stable;
}

.question-browser-drawer .question-browser-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-11);
    padding: var(--space-9) var(--space-12);
    margin: 0;
    border: var(--border-width-default) solid transparent;
    border-radius: var(--space-8);
    background: transparent;
    cursor: pointer;
    transition: background-color var(--motion-duration-fast) ease;
}

.question-browser-drawer .question-browser-item:hover {
    background: var(--warm-gray-soft);
}

.question-browser-drawer .question-browser-item.current,
.question-browser-drawer .question-browser-item.selected {
    background: var(--accent-action-soft-bg);
    border-color: var(--accent-action-soft-border);
}

.question-browser-drawer .qbi-status {
    display: flex;
    align-items: center;
    gap: var(--space-7);
    flex-shrink: 0;
    margin-top: var(--space-2);
}

.question-browser-drawer .qbi-num {
    min-width: 14px;
    font-size: var(--font-size-075);
    font-weight: var(--font-weight-medium);
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

.question-browser-drawer .question-browser-item.current .qbi-num,
.question-browser-drawer .question-browser-item.selected .qbi-num {
    color: var(--accent-action-dark);
}

.question-browser-drawer .qbi-dot {
    width: var(--space-7);
    height: var(--space-7);
    border-radius: 50%;
    flex-shrink: 0;
}

.question-browser-drawer .qbi-dot--new {
    background: var(--border-strong);
}

.question-browser-drawer .qbi-dot--done {
    background: var(--text-muted);
}

.question-browser-drawer .qbi-dot--correct {
    background: var(--success-text);
}

.question-browser-drawer .qbi-dot--incorrect {
    background: var(--danger-text);
}

.question-browser-drawer .qbi-dot--partial {
    background: var(--warning-accent);
}

.question-browser-drawer .qbi-bookmark {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    color: var(--accent-action);
    flex-shrink: 0;
}

.question-browser-drawer .qbi-title {
    flex: 1 1 auto;
    min-width: 0;
    font-size: var(--font-size-08125);
    line-height: var(--line-height-145);
    color: var(--text-primary);
    letter-spacing: var(--tracking-soft-tightest);
    /* Titles can be a passage/topic excerpt (SWT/Essay); clamp to two lines with an
       ellipsis so long text stays tidy instead of pushing the row tall. */
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

.question-browser-drawer .question-browser-item.current .qbi-title,
.question-browser-drawer .question-browser-item.selected .qbi-title {
    font-weight: var(--font-weight-medium);
}

.question-browser-drawer .qbi-bookmark-button {
    margin-top: var(--space-2);
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    cursor: pointer;
}

.question-browser-drawer .qbi-bookmark-button svg {
    width: var(--space-13);
    height: var(--space-13);
}

.question-browser-drawer .qbi-bookmark-button.bookmarked {
    color: var(--success-text);
}

.question-browser-drawer .question-browser-item:hover .qbi-bookmark-button:not(.bookmarked) {
    color: var(--text-secondary);
}

.question-browser-drawer .qbi-bookmark-button:disabled {
    cursor: default;
    opacity: 0.72;
}

.question-browser-drawer .question-browser-progress {
    display: grid;
    gap: var(--space-10);
    padding: var(--space-14) var(--space-24);
    border-top: var(--border-width-default) solid var(--border-subtle);
}

.question-browser-drawer .qbp-title {
    margin-bottom: 0;
    font-size: var(--font-size-065625);
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.question-browser-drawer .qbp-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
    text-align: left;
}

.question-browser-drawer .qbp-stat {
    display: inline-flex;
    align-items: baseline;
    gap: var(--space-4);
}

.question-browser-drawer .qbp-value {
    font-size: 0.84375rem;
    font-weight: var(--font-weight-medium);
    line-height: 1.2;
    letter-spacing: 0;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.question-browser-drawer .qbp-value--done {
    color: var(--text-secondary);
}

.question-browser-drawer .qbp-value--correct {
    color: var(--success-text);
}

.question-browser-drawer .qbp-value--incorrect {
    color: var(--danger-text);
}

.question-browser-drawer .qbp-value--bookmarked {
    color: var(--color-brand-violet-600);
}

.question-browser-drawer .qbp-label {
    margin-top: 0;
    font-size: 0.8125rem;
    font-weight: var(--font-weight-regular);
    color: var(--text-secondary);
    letter-spacing: 0;
}

.question-browser-drawer .question-browser-footer {
    display: block;
    padding: 0 var(--space-24) var(--space-18);
    border-top: 0;
}

.question-browser-drawer .question-browser-open-button {
    width: 100%;
    border: 0;
    border-radius: var(--radius-button-compact);
    padding: var(--space-9) var(--space-16);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-7);
    background: var(--accent-action);
    color: var(--text-on-emphasis);
    font-size: var(--font-size-084375);
    font-weight: var(--font-weight-medium);
}

.question-browser-drawer .question-browser-open-button:hover:not(:disabled) {
    background: var(--accent-action-hover);
}

.question-browser-drawer .question-browser-open-button-icon svg {
    width: var(--space-13);
    height: var(--space-13);
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    transition: transform var(--motion-duration-fast) var(--motion-ease-micro);
}

.question-browser-drawer .question-browser-open-button:hover:not(:disabled) .question-browser-open-button-icon svg {
    transform: translateX(var(--space-2));
}

.question-browser-drawer .question-browser-open-button:disabled {
    background: var(--warm-gray-soft);
    color: var(--text-muted);
    cursor: not-allowed;
}

.question-browser-drawer .question-browser-empty-state {
    flex: 1 1 auto;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-24);
    text-align: center;
}

.question-browser-drawer .question-browser-empty-state-icon {
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.question-browser-drawer .question-browser-empty-state-icon svg {
    width: var(--space-32);
    height: var(--space-32);
    stroke: currentColor;
    stroke-width: 1.6;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.question-browser-drawer .question-browser-empty-state-title {
    margin-top: var(--space-12);
    font-size: var(--space-14);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

.question-browser-drawer .question-browser-empty-state-copy {
    max-width: 280px;
    margin-top: var(--space-6);
    font-size: var(--font-size-078125);
    line-height: 1.5;
    color: var(--text-muted);
}

@media (prefers-reduced-motion: reduce) {
    .question-browser-backdrop,
    .question-browser-drawer,
    .question-browser-drawer .question-browser-open-button-icon svg,
    .question-browser-drawer .question-browser-item,
    .question-browser-drawer .question-browser-filter {
        transition-duration: 1ms !important;
        animation-duration: 1ms !important;
    }
}

/* ---- Relocated from app-shell.css (Phase 2-Б R2): attempts history panel (shared). ---- */
/* ==========================================================================
   Attempts history panel — shared by Reading and Writing
   ========================================================================== */

.question-attempts-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.question-attempts-panel-heading {
    display: inline-flex;
    align-items: center;
    gap: var(--space-8);
    min-width: 0;
}

.question-attempts-heading-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    flex: 0 0 auto;
}

.question-attempts-heading-icon svg {
    display: block;
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.45;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.question-attempts-title {
    margin: 0;
    color: var(--text-secondary);
    font-size: var(--space-15);
    font-weight: var(--font-weight-regular);
    line-height: 1.5;
}

.question-attempts-meta {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.8125rem;
    font-weight: var(--font-weight-regular);
    line-height: 1.4;
    white-space: nowrap;
}

.question-attempts-header-controls {
    display: inline-flex;
    align-items: center;
    gap: var(--space-10);
}

.question-attempts-pagination {
    display: inline-flex;
    align-items: center;
    gap: var(--space-6);
}

.question-attempts-page-button {
    min-width: 28px;
    min-height: 24px;
    padding: 0 8px;
    justify-content: center;
    text-decoration: none !important;
    border: var(--border-width-default) solid var(--border-subtle) !important;
    border-radius: 6px !important;
    background: transparent !important;
    color: var(--text-muted) !important;
    box-shadow: none !important;
    font-size: 0.875rem;
    line-height: 1;
}

.question-attempts-page-button:hover:not(:disabled),
.question-attempts-page-button:focus-visible:not(:disabled) {
    background: var(--warm-gray-soft) !important;
    color: var(--text-secondary) !important;
}

.question-attempts-page-button:disabled {
    opacity: 0.5;
    cursor: default;
}

.question-attempts-empty {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.5;
}

.question-attempts-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.question-attempts-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-10);
    padding: var(--space-10) var(--space-12);
    border: 0;
    border-bottom: var(--border-width-default) solid var(--border-subtle);
    border-radius: 6px;
    background: transparent;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
}

.question-attempts-item:hover {
    background: var(--warm-gray-soft);
}

.question-attempts-item.is-active {
    background: var(--warm-gray-soft);
}

.question-attempts-delete {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--motion-duration-fast) var(--motion-ease-standard),
        background-color var(--motion-duration-fast) var(--motion-ease-standard);
}

.question-attempts-delete svg {
    width: 15px;
    height: 15px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.9;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.question-attempts-delete:hover {
    /* The row itself hovers to --warm-gray-soft, so the circle must be darker to read. */
    background: var(--border-strong);
    color: var(--text-secondary);
}

.question-attempts-delete:active {
    background: var(--warm-gray-strong);
    color: var(--text-secondary);
}

.question-attempts-delete:focus-visible {
    /* No thick ring — focus just takes the hover fill (e.g. when focus returns here after cancelling
       the delete dialog). */
    outline: none;
    background: var(--border-strong);
    color: var(--text-secondary);
}

.question-attempts-indicator {
    flex: 0 0 auto;
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.question-attempts-item-content {
    min-width: 0;
    display: flex;
    align-items: center;
    flex: 1 1 auto;
}

.question-attempts-item-meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-12);
    min-width: 0;
    width: 100%;
}

.question-attempts-status {
    font-size: 0.875rem;
    line-height: 1.4;
    font-weight: var(--font-weight-medium);
}

.question-attempts-date {
    color: var(--text-muted);
    font-size: 0.8125rem;
    line-height: 1.4;
    white-space: nowrap;
}

.question-attempts-meta-right {
    min-width: 0;
    display: inline-flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-12);
    flex-wrap: wrap;
}

.question-attempts-score {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    padding: 2px 10px;
    border-radius: 999px;
    background: var(--bg-surface-alt, var(--warm-gray-soft));
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    line-height: 1.35;
}

/* Reading outcomes — correct / partial / incorrect */
.question-attempts-item.outcome-correct .question-attempts-status {
    color: var(--success-text);
}

.question-attempts-item.outcome-partial .question-attempts-status {
    color: var(--warning-accent);
}

.question-attempts-item.outcome-incorrect .question-attempts-status {
    color: var(--danger-text);
}

.question-attempts-item.outcome-correct .question-attempts-score {
    background: var(--success-fill);
    color: var(--success-text-dark);
}

.question-attempts-item.outcome-partial .question-attempts-score {
    background: var(--warning-fill);
    color: var(--warning-text-dark);
}

.question-attempts-item.outcome-incorrect .question-attempts-score {
    background: var(--danger-fill);
    color: var(--danger-text-dark);
}

.question-attempts-indicator .result-summary-icon {
    width: 18px;
    height: 18px;
}

.question-attempts-indicator .result-summary-icon--correct {
    color: var(--success-text);
}

.question-attempts-indicator .result-summary-icon--partial {
    color: var(--warning-accent);
}

.question-attempts-indicator .result-summary-icon--incorrect {
    color: var(--danger-text);
}

/* Writing outcomes — within-range / out-of-range */
.question-attempts-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.question-attempts-item.outcome-within-range .question-attempts-status {
    color: var(--accent-success);
}

.question-attempts-item.outcome-within-range .question-attempts-dot {
    background: var(--accent-success);
}

.question-attempts-item.outcome-out-of-range .question-attempts-status {
    color: var(--accent-danger);
}

.question-attempts-item.outcome-out-of-range .question-attempts-dot {
    background: var(--accent-danger);
}