/* ============================================================================
   KNOWLEDGE BASE - NDT Quizzes
   WordPress Integrated Styles (Light Theme — matches testinspect.com)
   ============================================================================ */

.kb-app {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #333;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.kb-main {
    min-height: 60vh;
    padding: 40px 0 60px;
}

.kb-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================================================
   HERO
   ============================================================================ */

.kb-hero {
    text-align: center;
    margin-bottom: 40px;
}

.kb-hero h1 {
    font-size: 32px;
    font-weight: 700;
    color: #1a365d;
    margin: 0 0 12px 0;
}

.kb-hero-sub {
    font-size: 16px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================================================
   QUIZ CARDS GRID
   ============================================================================ */

.kb-quiz-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

@media (min-width: 600px) {
    .kb-quiz-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .kb-quiz-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.kb-quiz-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 24px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.kb-quiz-card:hover {
    border-color: #17B8DA;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(23, 184, 218, 0.12);
    text-decoration: none;
    color: inherit;
}

.kb-card-icon {
    color: #17B8DA;
    margin-bottom: 16px;
}

.kb-card-title {
    font-size: 18px;
    font-weight: 600;
    color: #1a365d;
    margin: 0 0 8px 0;
}

.kb-card-desc {
    font-size: 13px;
    color: #666;
    margin: 0 0 16px 0;
    flex: 1;
}

.kb-card-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.kb-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #0d8ba8;
    background: rgba(23, 184, 218, 0.08);
    border: 1px solid rgba(23, 184, 218, 0.2);
    border-radius: 4px;
    padding: 3px 8px;
}

.kb-card-btn {
    display: inline-block;
    text-align: center;
    padding: 10px 20px;
    background: linear-gradient(135deg, #17B8DA, #0d8ba8);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    transition: box-shadow 0.2s;
}

.kb-quiz-card:hover .kb-card-btn {
    box-shadow: 0 4px 15px rgba(23, 184, 218, 0.3);
}

/* ============================================================================
   BACK LINK
   ============================================================================ */

.kb-back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #17B8DA;
    font-size: 14px;
    text-decoration: none;
    margin-bottom: 24px;
}

.kb-back-link:hover {
    color: #0d8ba8;
    text-decoration: none;
}

/* ============================================================================
   QUIZ SETUP
   ============================================================================ */

.kb-setup {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.kb-setup h1 {
    font-size: 28px;
    font-weight: 700;
    color: #1a365d;
    margin: 0 0 12px 0;
}

.kb-setup-desc {
    font-size: 15px;
    color: #666;
    margin: 0 0 8px 0;
}

.kb-setup-info {
    font-size: 13px;
    color: #999;
    margin: 0 0 32px 0;
}

.kb-setup-options h3 {
    font-size: 16px;
    font-weight: 600;
    color: #444;
    margin: 0 0 16px 0;
}

.kb-count-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.kb-count-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 20px 32px;
    background: #fff;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    color: #333;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.2s, background 0.2s;
    min-width: 140px;
}

.kb-count-btn span {
    font-size: 12px;
    font-weight: 400;
    color: #999;
}

.kb-count-btn:hover {
    border-color: #17B8DA;
    background: rgba(23, 184, 218, 0.04);
    transform: translateY(-2px);
}

/* ============================================================================
   PROGRESS BAR
   ============================================================================ */

.kb-progress-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #f8f9fa;
    padding: 12px 0;
    margin-bottom: 20px;
    border-bottom: 1px solid #e0e0e0;
}

.kb-progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: #777;
    margin-bottom: 6px;
}

.kb-progress-track {
    height: 4px;
    background: #e0e0e0;
    border-radius: 2px;
    overflow: hidden;
}

.kb-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #17B8DA, #4dd4ec);
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 0;
}

/* ============================================================================
   QUESTION CARDS
   ============================================================================ */

.kb-question-card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
}

.kb-q-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.kb-q-number {
    font-size: 13px;
    font-weight: 700;
    color: #17B8DA;
}

.kb-q-category {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #777;
    background: #f0f0f0;
    padding: 2px 8px;
    border-radius: 4px;
}

.kb-q-level {
    font-size: 11px;
    font-weight: 600;
    color: #0d8ba8;
    background: rgba(23, 184, 218, 0.08);
    padding: 2px 8px;
    border-radius: 4px;
}

.kb-q-text {
    font-size: 15px;
    color: #333;
    margin: 0 0 16px 0;
    line-height: 1.5;
}

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

.kb-option-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 16px;
    background: #fafafa;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    color: #333;
    font-size: 14px;
    text-align: left;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.kb-option-btn:hover {
    border-color: #17B8DA;
    background: rgba(23, 184, 218, 0.04);
}

.kb-option-btn.selected {
    border-color: #17B8DA;
    background: rgba(23, 184, 218, 0.08);
}

.kb-option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    background: #e8e8e8;
    color: #777;
    font-size: 12px;
    font-weight: 700;
}

.kb-option-btn.selected .kb-option-letter {
    background: #17B8DA;
    color: #fff;
}

.kb-option-text {
    flex: 1;
}

.kb-option-icon {
    font-size: 16px;
    font-weight: 700;
    margin-left: auto;
}

/* ============================================================================
   SUBMIT BAR
   ============================================================================ */

.kb-submit-bar {
    position: sticky;
    bottom: 0;
    background: #f8f9fa;
    border-top: 1px solid #e0e0e0;
    padding: 16px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 20px;
}

.kb-status-ready {
    color: #4caf50;
    font-size: 13px;
    font-weight: 600;
}

.kb-status-pending {
    color: #999;
    font-size: 13px;
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.kb-btn-primary {
    padding: 12px 28px;
    background: linear-gradient(135deg, #17B8DA, #0d8ba8);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.kb-btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(23, 184, 218, 0.3);
}

.kb-btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.kb-btn-outline {
    padding: 12px 28px;
    background: transparent;
    color: #17B8DA;
    font-size: 14px;
    font-weight: 600;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: border-color 0.2s;
}

.kb-btn-outline:hover {
    border-color: #17B8DA;
}

/* ============================================================================
   RESULTS
   ============================================================================ */

.kb-result-card {
    text-align: center;
    padding: 40px 24px;
    border-radius: 12px;
    margin-bottom: 24px;
}

.kb-result-card.pass {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.08), rgba(76, 175, 80, 0.03));
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.kb-result-card.fail {
    background: linear-gradient(135deg, rgba(244, 67, 54, 0.08), rgba(244, 67, 54, 0.03));
    border: 1px solid rgba(244, 67, 54, 0.3);
}

.kb-result-score {
    font-size: 64px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 12px;
}

.kb-result-card.pass .kb-result-score { color: #4caf50; }
.kb-result-card.fail .kb-result-score { color: #f44336; }

.kb-result-badge {
    display: inline-block;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.kb-result-badge.pass {
    background: rgba(76, 175, 80, 0.15);
    color: #388e3c;
}

.kb-result-badge.fail {
    background: rgba(244, 67, 54, 0.15);
    color: #d32f2f;
}

.kb-result-detail {
    font-size: 16px;
    color: #666;
}

/* Category Breakdown */
.kb-category-breakdown {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
}

.kb-category-breakdown h3 {
    font-size: 16px;
    font-weight: 600;
    color: #1a365d;
    margin: 0 0 16px 0;
}

.kb-cat-row {
    margin-bottom: 12px;
}

.kb-cat-row:last-child {
    margin-bottom: 0;
}

.kb-cat-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}

.kb-cat-name {
    font-size: 13px;
    color: #444;
}

.kb-cat-score {
    font-size: 13px;
    color: #777;
    font-variant-numeric: tabular-nums;
}

.kb-cat-bar-track {
    height: 6px;
    background: #e8e8e8;
    border-radius: 3px;
    overflow: hidden;
}

.kb-cat-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.5s ease;
}

.kb-cat-bar-fill.good { background: #4caf50; }
.kb-cat-bar-fill.medium { background: #ff9800; }
.kb-cat-bar-fill.poor { background: #f44336; }

.kb-result-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 24px;
    flex-wrap: wrap;
}

/* ============================================================================
   REVIEW
   ============================================================================ */

.kb-review-header {
    margin-bottom: 24px;
}

.kb-review-filters {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.kb-filter-btn {
    padding: 8px 16px;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    color: #777;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
}

.kb-filter-btn.active {
    border-color: #17B8DA;
    color: #0d8ba8;
}

.kb-review-cats {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.kb-cat-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 20px;
    color: #666;
    font-size: 12px;
    text-decoration: none;
    transition: border-color 0.2s;
}

.kb-cat-pill:hover {
    border-color: #17B8DA;
    color: #333;
    text-decoration: none;
}

.kb-cat-pill span {
    color: #999;
    font-weight: 600;
}

.kb-all-correct {
    background: rgba(76, 175, 80, 0.08);
    border: 1px solid rgba(76, 175, 80, 0.3);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    color: #388e3c;
    font-weight: 600;
    margin-bottom: 20px;
}

.kb-review-cat-title {
    font-size: 16px;
    font-weight: 600;
    color: #1a365d;
    margin: 24px 0 12px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid #e0e0e0;
}

/* Review question card states */
.kb-question-card.review.correct {
    border-color: rgba(76, 175, 80, 0.4);
    background: rgba(76, 175, 80, 0.04);
}

.kb-question-card.review.wrong {
    border-color: rgba(244, 67, 54, 0.4);
    background: rgba(244, 67, 54, 0.04);
}

.kb-question-card.review.correct .kb-q-number { color: #4caf50; }
.kb-question-card.review.wrong .kb-q-number { color: #f44336; }

/* Review option states */
.kb-q-options.review .kb-option-btn {
    cursor: default;
    pointer-events: none;
}

.kb-option-btn.review-option.correct-answer {
    border-color: rgba(76, 175, 80, 0.5);
    background: rgba(76, 175, 80, 0.08);
}

.kb-option-btn.review-option.correct-answer .kb-option-letter {
    background: #4caf50;
    color: #fff;
}

.kb-option-btn.review-option.correct-answer .kb-option-icon {
    color: #4caf50;
}

.kb-option-btn.review-option.wrong-answer {
    border-color: rgba(244, 67, 54, 0.5);
    background: rgba(244, 67, 54, 0.08);
}

.kb-option-btn.review-option.wrong-answer .kb-option-letter {
    background: #f44336;
    color: #fff;
}

.kb-option-btn.review-option.wrong-answer .kb-option-icon {
    color: #f44336;
}

/* Explanation */
.kb-explanation {
    margin-top: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.5;
}

.kb-explanation.correct {
    background: rgba(76, 175, 80, 0.06);
    color: #2e7d32;
}

.kb-explanation.wrong {
    background: rgba(244, 67, 54, 0.06);
    color: #c62828;
}

.kb-explanation strong {
    display: block;
    margin-bottom: 4px;
}

/* ============================================================================
   SHARE BAR
   ============================================================================ */

.kb-share-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 20px;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.kb-share-label {
    font-size: 13px;
    color: #777;
}

.kb-share-buttons {
    display: flex;
    gap: 8px;
}

.kb-share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: #f5f5f5;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    color: #777;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
}

.kb-share-btn:hover {
    border-color: #17B8DA;
    color: #17B8DA;
}

/* ============================================================================
   DISCLAIMER
   ============================================================================ */

.kb-disclaimer {
    padding: 16px 20px;
    border-top: 1px solid #e0e0e0;
    font-size: 12px;
    color: #999;
    line-height: 1.6;
}

.kb-disclaimer p {
    margin: 0 0 8px 0;
}

.kb-disclaimer p:last-child {
    margin-bottom: 0;
}

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

@media (max-width: 600px) {
    .kb-hero h1 { font-size: 24px; }
    .kb-setup h1 { font-size: 22px; }
    .kb-result-score { font-size: 48px; }
    .kb-count-btn { min-width: 100px; padding: 16px 20px; }
    .kb-submit-bar { flex-direction: column; text-align: center; }
    .kb-share-bar { flex-direction: column; }
}