/**
 * Multi-Part Question Styles - F-030 Phase 4A
 *
 * Styles for multi-part questions with:
 * - Tab navigation (desktop ≥768px)
 * - Accordion navigation (mobile <768px)
 * - Progress indicators
 * - Part badges (pending, partial, complete)
 */

/* ==================== MULTI-PART CONTAINER ==================== */
/* Note: Container frame comes from parent .question-display */

.quiz-multipart {
    width: 100%;
    min-height: 550px; /* Consistent with unified container */
    animation: multipartContentFadeIn 300ms ease-out;
}

@keyframes multipartContentFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Question stem for multi-part - uses unified badge layout */
.quiz-multipart .quiz-question-stem {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* ==================== TAB NAVIGATION (DESKTOP) ==================== */

.multi-part-navigation-wrapper {
    margin-bottom: var(--space-lg);
}

.multi-part-navigation {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid rgba(59, 130, 246, 0.2);
    overflow-x: auto;
    scrollbar-width: thin;
    position: relative;
}

.multi-part-navigation::-webkit-scrollbar {
    height: 6px;
}

.multi-part-navigation::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.multi-part-tab {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    font-size: var(--font-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    flex-shrink: 0;
    min-height: 36px;
}

.multi-part-tab:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.multi-part-tab:focus {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.multi-part-tab-active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.multi-part-tab .part-label {
    font-size: var(--font-base);
    font-weight: 700;
    color: var(--accent);
}

.multi-part-tab .part-marks {
    padding: 2px 6px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    border-radius: var(--radius-sm);
    font-size: var(--font-xs);
    font-weight: 600;
}

.multi-part-tab-active .part-marks {
    background: var(--accent);
    color: white;
}

.multi-part-tab .part-badge {
    font-size: var(--font-lg);
    line-height: 1;
}

/* ==================== PART PANELS ==================== */

.multi-part-panel {
    display: none;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    backdrop-filter: blur(8px);
}

.multi-part-panel-content {
    padding: var(--space-lg);
    min-height: 450px;
    display: flex;
    flex-direction: column;
}

/* Ensure submit container is part of the actions */
.multi-part-panel .quiz-submit-container {
    margin: 0;
    padding: 0;
    border: none;
}

.multi-part-panel-content {
    /* Wrapper for part content */
}

.multi-part-panel.multi-part-active {
    display: block;
    animation: fadeIn 0.2s ease-in;
}

/* Keyword components inside multi-part panels */
.multi-part-panel .quiz-keyword-textarea,
.multi-part-panel .spell-highlight-container textarea {
    min-height: 200px; /* Smaller for parts */
    background: rgba(255, 255, 255, 0.02);
}

.multi-part-panel .hint-checklist-container {
    margin-top: var(--space-sm);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.multi-part-panel /* Part stem */
.part-stem {
    font-size: var(--font-base);
    font-weight: 600;
    color: var(--accent);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid rgba(59, 130, 246, 0.2);
}

/* Part question content */
.part-question-content {
    flex: 1;
    min-height: 300px;
}

/* Keyword layout adjustments for multi-part */
.multi-part-panel .quiz-keyword-layout {
    display: flex;
    gap: var(--space-md);
    height: 100%;
}

.multi-part-panel .quiz-keyword-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.multi-part-panel .quiz-keyword-sidebar {
    width: 320px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

/* Enlarge the text area */
.multi-part-panel .quiz-keyword-textarea,
.multi-part-panel .spell-highlight-container textarea {
    min-height: 370px;
    height: 370px;
}

/* Submit container - align to bottom left */
.multi-part-panel .quiz-submit-container {
    margin-top: auto;
    padding: 10px 0 0 0;
    border: none;
    display: flex;
    justify-content: flex-start;
    align-self: flex-start;
}

/* Submit button styling - fixed width on left */
.multi-part-panel .quiz-btn-submit {
    width: 140px;
}

/* Skip button */
.part-skip-btn {
    padding: var(--space-sm) var(--space-lg);
    background: transparent;
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    font-size: var(--font-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    opacity: 0.8;
}

.part-skip-btn:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Inside multi-part panels, keyword questions should work seamlessly */
.multi-part-panel .quiz-keyword {
    /* Keyword questions inside parts use full space */
    min-height: auto;
}

/* Adjust keyword layout in multi-part */
.multi-part-panel .quiz-keyword-layout {
    gap: var(--space-md);
}

.multi-part-panel .quiz-keyword-sidebar {
    position: sticky;
    top: var(--space-md);
    align-self: flex-start;
}

/* Hide nested question stems (already shown in part-stem) */
.multi-part-panel .quiz-question-stem {
    display: none;
}

/* ==================== ACCORDION NAVIGATION (MOBILE) ==================== */

.multi-part-accordion-header {
    display: none; /* Hidden on desktop */
}

@media (max-width: 768px) {
    /* Hide tab navigation on mobile */
    .multi-part-navigation {
        display: none;
    }

    /* Show accordion headers */
    .multi-part-accordion-header {
        display: flex;
        align-items: center;
        gap: var(--space-sm);
        padding: var(--space-md);
        background: var(--bg-secondary);
        border: 2px solid var(--border);
        border-radius: var(--radius-md);
        cursor: pointer;
        transition: all var(--transition-fast);
        margin-bottom: 0;
    }

    .multi-part-accordion-header:hover {
        background: var(--bg-hover);
        border-color: var(--border-light);
    }

    .multi-part-accordion-header:focus {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
    }

    .multi-part-accordion-header .accordion-label {
        font-size: var(--font-lg);
        font-weight: 700;
        color: var(--text-primary);
    }

    .multi-part-accordion-header .accordion-marks {
        padding: 2px 6px;
        background: rgba(59, 130, 246, 0.1);
        color: var(--accent);
        border-radius: var(--radius-sm);
        font-size: var(--font-xs);
        font-weight: 600;
    }

    .multi-part-accordion-header .accordion-badge {
        margin-left: auto;
        font-size: var(--font-lg);
    }

    .multi-part-accordion-header .accordion-icon {
        font-size: var(--font-sm);
        color: var(--text-muted);
        transition: transform var(--transition-fast);
    }

    /* Panel always visible but content hidden via accordion */
    .multi-part-panel {
        display: block;
        padding: 0;
        border: none;
        background: transparent;
        margin-bottom: var(--space-md);
    }

    .multi-part-panel-content {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .multi-part-panel.multi-part-active .multi-part-panel-content {
        max-height: 2000px; /* Large enough for content */
        padding: var(--space-md);
        background: var(--bg-card);
        border: 2px solid var(--border);
        border-top: none;
        border-radius: 0 0 var(--radius-md) var(--radius-md);
        margin-top: -8px;
    }

    .multi-part-panel.multi-part-active .multi-part-accordion-header {
        background: var(--bg-card);
        border-color: var(--accent);
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
    }

    .multi-part-panel.multi-part-active .multi-part-accordion-header .accordion-icon {
        transform: rotate(0deg);
    }
}

/* ==================== PROGRESS INLINE ==================== */

.multi-part-progress-inline {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0 var(--space-md);
    flex-shrink: 0;
}

.progress-text-compact {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--accent);
    white-space: nowrap;
}

/* ==================== SUBMIT CONTAINER IN PARTS ==================== */

.multi-part-panel .quiz-submit-container {
    flex: 1;
    display: flex;
    justify-content: flex-start;
}

.part-actions .quiz-submit-container + .part-skip-btn {
    margin-left: auto;
}

/* ==================== AGGREGATED SCORE ==================== */

.multi-part-total-score {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: rgba(59, 130, 246, 0.1);
    border: 2px solid var(--accent);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.multi-part-total-score .label {
    font-size: var(--font-base);
    font-weight: 600;
    color: var(--text-secondary);
}

.multi-part-total-score .value {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--accent);
}

/* ==================== BADGE STATES ==================== */

.part-badge,
.accordion-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

/* Pending: ○ */
.part-badge:contains("○"),
.accordion-badge:contains("○") {
    color: var(--text-muted);
}

/* Partial: ⦿ */
.part-badge:contains("⦿"),
.accordion-badge:contains("⦿") {
    color: var(--warning);
}

/* Complete: ✓ */
.part-badge:contains("✓"),
.accordion-badge:contains("✓") {
    color: var(--success);
}

/* Skipped: ⊘ */
.part-badge:contains("⊘"),
.accordion-badge:contains("⊘") {
    color: var(--error);
}

/* ==================== ACCESSIBILITY ==================== */

.multi-part-announcer {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ==================== SUBMIT BUTTON ==================== */

.quiz-multipart .quiz-submit-container {
    margin-top: var(--space-lg);
}

.quiz-multipart .quiz-btn-submit {
    width: 100%;
    padding: var(--space-md) var(--space-xl);
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quiz-multipart .quiz-btn-submit:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-accent);
}

.quiz-multipart .quiz-btn-submit:active {
    transform: translateY(0);
}

/* ==================== FEEDBACK ==================== */

.quiz-multipart .quiz-feedback {
    margin-top: var(--space-lg);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--font-sm);
    display: none;
}

.quiz-multipart .quiz-feedback.show {
    display: block;
}

.quiz-multipart .quiz-feedback.success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.quiz-multipart .quiz-feedback.warning {
    background: rgba(234, 179, 8, 0.1);
    border: 1px solid var(--warning);
    color: var(--warning);
}

/* ==================== RESPONSIVE ADJUSTMENTS ==================== */

@media (max-width: 640px) {
    .multi-part-tab {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-sm);
    }

    .multi-part-tab .part-label {
        font-size: var(--font-base);
    }

    .multi-part-panel {
        padding: var(--space-md);
    }

    .multi-part-progress {
        padding: var(--space-sm);
    }

    .multi-part-total-score {
        flex-direction: column;
        gap: var(--space-xs);
    }

    .multi-part-total-score .value {
        font-size: var(--font-lg);
    }
}

/* ==================== PRINT STYLES ==================== */

@media print {
    .multi-part-navigation,
    .multi-part-accordion-header {
        display: none;
    }

    .multi-part-panel {
        display: block !important;
        page-break-inside: avoid;
        border: 1px solid #000;
        padding: 1em;
        margin-bottom: 1em;
    }

    .multi-part-panel-content {
        max-height: none !important;
    }

    .progress-bar,
    .multi-part-total-score {
        display: none;
    }
}