/**
 * Enterprise Question Engine Styles v1.0
 * Premium exam interface for all question types
 */

/* ===================================
   QUESTION TYPE BADGES
   =================================== */
.question-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.question-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.question-number {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 10px;
    border-radius: 6px;
}

.badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.badge-type {
    background: var(--bg-glass-strong);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.badge-marks {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-negative {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.1));
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-easy {
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
}

.badge-medium {
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
}

.badge-hard {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.question-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.question-text p {
    margin-bottom: 12px;
}

.question-text img {
    max-width: 100%;
    border-radius: 8px;
}

.question-hint {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.question-hint i {
    color: var(--warning);
    font-size: 1.2rem;
    margin-top: 2px;
}

.question-diagram {
    margin: 20px 0;
    text-align: center;
}

.question-diagram img {
    max-width: 100%;
    max-height: 400px;
    border-radius: 12px;
    border: 1px solid var(--border);
    cursor: zoom-in;
    transition: transform 0.3s ease;
}

.question-diagram img:hover {
    transform: scale(1.02);
}

/* ===================================
   MCQ OPTIONS
   =================================== */
.options-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-glass);
    border: 2px solid var(--border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.25s ease;
    user-select: none;
}

.option-card:hover {
    background: var(--bg-glass-strong);
    border-color: var(--primary);
    transform: translateX(4px);
}

.option-card.selected {
    background: linear-gradient(135deg, var(--primary-light), rgba(139, 92, 246, 0.1));
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
}

.option-letter {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border: 2px solid var(--border-strong);
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-secondary);
    flex-shrink: 0;
    transition: all 0.25s ease;
}

.option-card.selected .option-letter {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.option-text {
    flex: 1;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-primary);
}

.option-check {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: transparent;
    border: 2px solid var(--border);
    color: transparent;
    transition: all 0.25s ease;
}

.option-card.selected .option-check {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

/* Multi-Select Checkbox */
.option-card.checkbox .option-checkbox {
    font-size: 1.4rem;
    color: var(--text-tertiary);
}

.option-card.checkbox.selected .option-checkbox {
    color: var(--primary);
}

.selection-info {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-bottom: 12px;
    font-style: italic;
}

/* ===================================
   TRUE / FALSE
   =================================== */
.true-false-options {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.tf-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 40px;
    background: var(--bg-glass);
    border: 2px solid var(--border);
    border-radius: 16px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tf-btn:hover {
    background: var(--bg-glass-strong);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.tf-btn.selected {
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.tf-btn.selected:first-child {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
    border-color: var(--success);
    color: var(--success);
}

.tf-btn.selected:last-child {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.1));
    border-color: var(--danger);
    color: var(--danger);
}

.tf-btn i {
    font-size: 1.5rem;
}

/* ===================================
   FILL IN THE BLANK
   =================================== */
.fill-blank-text {
    font-size: 1.1rem;
    line-height: 2.5;
    color: var(--text-primary);
}

.inline-blank {
    display: inline-block;
    width: auto;
    min-width: 120px;
    max-width: 250px;
    padding: 6px 12px;
    background: var(--bg-elevated);
    border: 2px solid var(--primary);
    border-radius: 8px;
    font-size: 1rem;
    color: var(--text-primary);
    text-align: center;
    margin: 0 4px;
    vertical-align: middle;
}

.inline-blank:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-light);
}

.blanks-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.blank-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.blank-item label {
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 80px;
}

.blank-input {
    flex: 1;
    max-width: 400px;
    padding: 12px 16px;
    background: var(--bg-elevated);
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.blank-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* ===================================
   TEXT INPUTS (One Word, Short, Long)
   =================================== */
.one-word-input,
.short-answer-input,
.long-answer-input,
.numerical-input,
.formula-input {
    width: 100%;
}

.answer-input {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-elevated);
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.answer-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.answer-input.one-word {
    max-width: 400px;
}

.answer-input.numerical {
    max-width: 300px;
    font-family: 'JetBrains Mono', monospace;
    text-align: center;
    font-size: 1.2rem;
}

.tolerance-info {
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.answer-textarea {
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-elevated);
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
    transition: all 0.2s ease;
}

.answer-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.answer-textarea.short {
    min-height: 120px;
}

.answer-textarea.long {
    min-height: 250px;
}

.answer-textarea.formula {
    font-family: 'JetBrains Mono', monospace;
    min-height: 80px;
}

.word-counter {
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    text-align: right;
}

.formula-preview {
    margin-top: 16px;
    padding: 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 10px;
}

.formula-preview .preview-label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-right: 12px;
}

.formula-preview .preview-content {
    font-size: 1.2rem;
    color: var(--text-primary);
}

/* ===================================
   MATCH THE FOLLOWING
   =================================== */
.match-following {
    width: 100%;
}

.match-instructions {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-bottom: 16px;
    font-style: italic;
}

.match-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.match-column {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
}

.column-header {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.match-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-elevated);
    border-radius: 8px;
    margin-bottom: 8px;
}

.match-item:last-child {
    margin-bottom: 0;
}

.match-label {
    font-weight: 700;
    color: var(--primary);
    min-width: 24px;
}

.match-text {
    flex: 1;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.match-select {
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
    min-width: 150px;
}

.match-select:focus {
    outline: none;
    border-color: var(--primary);
}

/* ===================================
   ASSERTION & REASON
   =================================== */
.assertion-reason {
    width: 100%;
}

.ar-statement {
    padding: 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 16px;
}

.ar-statement.assertion {
    border-left: 4px solid var(--primary);
}

.ar-statement.reason {
    border-left: 4px solid var(--secondary);
}

.ar-label {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: block;
}

.ar-text {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.ar-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
}

.ar-option {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 18px;
    background: var(--bg-glass);
    border: 2px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.ar-option:hover {
    background: var(--bg-glass-strong);
    border-color: var(--primary);
}

.ar-option.selected {
    background: linear-gradient(135deg, var(--primary-light), rgba(139, 92, 246, 0.1));
    border-color: var(--primary);
}

.ar-option input[type="radio"] {
    margin-top: 3px;
    accent-color: var(--primary);
}

.ar-option-text {
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.5;
}

/* ===================================
   SEQUENCE / ORDERING
   =================================== */
.sequence-container {
    width: 100%;
}

.sequence-instructions {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-bottom: 16px;
    font-style: italic;
}

.sequence-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sequence-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: var(--bg-glass);
    border: 2px solid var(--border);
    border-radius: 10px;
    cursor: grab;
    transition: all 0.2s ease;
    user-select: none;
}

.sequence-item:hover {
    background: var(--bg-glass-strong);
    border-color: var(--primary);
}

.sequence-item.dragging {
    opacity: 0.5;
    transform: scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.sequence-item:active {
    cursor: grabbing;
}

.sequence-handle {
    color: var(--text-tertiary);
    font-size: 1.2rem;
}

.sequence-number {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: white;
    font-weight: 700;
    font-size: 0.9rem;
    border-radius: 8px;
}

.sequence-text {
    flex: 1;
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* ===================================
   CASE STUDY
   =================================== */
.case-study {
    width: 100%;
}

.case-study-passage {
    padding: 24px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
    max-height: 400px;
    overflow-y: auto;
}

.sub-questions {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sub-question {
    padding: 20px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.sub-q-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.sub-q-number {
    font-weight: 700;
    color: var(--primary);
}

.sub-q-marks {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.sub-q-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.sub-q-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sub-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sub-option:hover {
    border-color: var(--primary);
}

.sub-option.selected {
    background: var(--primary-light);
    border-color: var(--primary);
}

.sub-q-answer {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-glass);
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 0.95rem;
    color: var(--text-primary);
    resize: vertical;
    min-height: 80px;
    font-family: inherit;
}

.sub-q-answer:focus {
    outline: none;
    border-color: var(--primary);
}

/* ===================================
   DIAGRAM BASED
   =================================== */
.diagram-based {
    width: 100%;
}

.diagram-container {
    position: relative;
    text-align: center;
    margin-bottom: 20px;
}

.diagram-image {
    max-width: 100%;
    max-height: 500px;
    border-radius: 12px;
    border: 1px solid var(--border);
    cursor: zoom-in;
}

.zoom-btn {
    position: absolute;
    bottom: 16px;
    right: 16px;
    padding: 8px 16px;
    background: rgba(0, 0, 0, 0.7);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: background 0.2s ease;
}

.zoom-btn:hover {
    background: var(--primary);
}

.diagram-answer {
    margin-top: 20px;
}

/* ===================================
   IMAGE ZOOM MODAL
   =================================== */
.image-zoom-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.zoom-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
}

.zoom-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
}

.zoom-content img {
    max-width: 100%;
    max-height: 90vh;
    border-radius: 12px;
}

.zoom-close {
    position: absolute;
    top: -40px;
    right: 0;
    width: 36px;
    height: 36px;
    background: var(--danger);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===================================
   ANSWER AREA
   =================================== */
.answer-area {
    padding: 24px;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border);
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 768px) {
    .match-grid {
        grid-template-columns: 1fr;
    }

    .true-false-options {
        flex-direction: column;
    }

    .tf-btn {
        width: 100%;
        justify-content: center;
    }

    .option-card {
        padding: 14px 16px;
    }
}

/* ===================================
   AI DIAGRAM GENERATION
   =================================== */
.ai-diagram-container {
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 2px dashed var(--border);
    border-radius: 16px;
    position: relative;
}

.diagram-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.diagram-loading i {
    font-size: 1.2rem;
    color: var(--primary);
}

.diagram-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: ai-spin 1s linear infinite;
}

@keyframes ai-spin {
    to {
        transform: rotate(360deg);
    }
}

.ai-diagram-badge {
    position: absolute;
    bottom: 12px;
    left: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.9), rgba(139, 92, 246, 0.9));
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.4);
}

.ai-diagram-badge i {
    font-size: 1rem;
}

.ai-generated-diagram {
    max-width: 100%;
    max-height: 500px;
    border-radius: 12px;
    border: 1px solid var(--border);
    cursor: zoom-in;
    transition: transform 0.3s ease;
}

.ai-generated-diagram:hover {
    transform: scale(1.02);
}

.diagram-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

.diagram-error i {
    font-size: 2.5rem;
    color: var(--warning);
}

.retry-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--primary);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.retry-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}