/* Calibration Test Styles */
.cts-container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

.cts-screen {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Cards */
.cts-card {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
}

.cts-info-box {
    background: #f8f9fa;
    border-left: 4px solid #002654;
    padding: 20px;
    margin: 30px 0;
    border-radius: 4px;
}

.cts-info-box h3 {
    margin-top: 0;
    color: #002654;
}

.cts-info-box ul {
    margin: 15px 0 0 0;
    padding-left: 20px;
}

.cts-info-box li {
    margin: 8px 0;
    line-height: 1.6;
}

/* Buttons */
.cts-button {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.cts-button-primary {
    background: #C8102E;
    color: white;
}

.cts-button-primary:hover {
    background: #a00d25;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(200, 16, 46, 0.3);
}

.cts-button-secondary {
    background: #002654;
    color: white;
}

.cts-button-secondary:hover {
    background: #001a3d;
}

/* Progress Bar */
.cts-progress-bar {
    position: relative;
    width: 100%;
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    margin-bottom: 30px;
    overflow: hidden;
}

.cts-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #002654, #C8102E);
    transition: width 0.4s ease;
    border-radius: 4px;
}

.cts-progress-text {
    display: block;
    text-align: center;
    margin-top: 8px;
    font-size: 14px;
    color: #6c757d;
    font-weight: 500;
}

/* Question Card */
.cts-question-card {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
}

.cts-category {
    display: inline-block;
    background: #002654;
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.cts-question {
    font-size: 24px;
    line-height: 1.5;
    color: #212529;
    margin: 20px 0 30px;
    font-weight: 500;
}

/* Answer Buttons */
.cts-answer-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 30px 0;
}

.cts-answer-btn {
    padding: 24px;
    background: white;
    border: 3px solid #dee2e6;
    border-radius: 12px;
    font-size: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.cts-answer-btn:hover {
    border-color: #002654;
    background: #f8f9fa;
    transform: translateY(-2px);
}

.cts-answer-btn.selected {
    border-color: #C8102E;
    background: #fff5f5;
}

.cts-answer-icon {
    font-size: 32px;
    font-weight: bold;
}

/* Confidence Section */
.cts-confidence-section {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid #e9ecef;
}

.cts-confidence-label {
    display: block;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #212529;
}

#cts-confidence-value {
    color: #C8102E;
    font-size: 22px;
}

#cts-confidence-slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    outline: none;
    -webkit-appearance: none;
    background: linear-gradient(to right, #ffc107 0%, #28a745 100%);
    margin: 20px 0;
}

#cts-confidence-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #002654;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

#cts-confidence-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #002654;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.cts-slider-marks {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: #6c757d;
    margin: 8px 0 20px;
    padding: 0 2px;
}

.cts-slider-marks span {
    font-weight: 600;
}

.cts-confidence-guide {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: #6c757d;
    margin-bottom: 25px;
}

/* Results */
.cts-results-container {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
}

.cts-results-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.cts-result-card {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    border: 2px solid #e9ecef;
}

.cts-result-label {
    font-size: 14px;
    color: #6c757d;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cts-result-value {
    font-size: 48px;
    font-weight: 700;
    color: #002654;
    margin: 15px 0;
}

.cts-result-value.excellent {
    color: #28a745;
}

.cts-result-value.good {
    color: #17a2b8;
}

.cts-result-desc {
    font-size: 13px;
    color: #6c757d;
    margin-top: 8px;
}

.cts-result-reference {
    font-size: 11px;
    color: #28a745;
    font-weight: 600;
    margin-top: 8px;
    font-style: italic;
}

/* Chart */
.cts-chart-container {
    margin: 40px 0;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 8px;
}

.cts-chart-container h3 {
    margin-top: 0;
    color: #002654;
}

.cts-chart-goal {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: 4px;
    font-size: 15px;
    line-height: 1.6;
}

.cts-chart-goal strong {
    color: #856404;
}

.cts-personalized-feedback {
    background: #e7f3ff;
    border-left: 4px solid #0066cc;
    padding: 20px;
    margin: 20px 0;
    border-radius: 4px;
    font-size: 15px;
    line-height: 1.7;
}

.cts-personalized-feedback strong {
    color: #002654;
}

#cts-calibration-chart {
    max-height: 400px;
    margin-bottom: 30px;
}

.cts-historical-chart-container {
    margin: 40px 0;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 8px;
    display: none;
}

.cts-historical-chart-container h3 {
    margin-top: 0;
    color: #002654;
}

#cts-historical-chart {
    max-height: 400px;
    margin-bottom: 20px;
}

.cts-chart-explanation {
    background: white;
    padding: 30px;
    border-radius: 8px;
    margin-top: 30px;
    border-left: 4px solid #C8102E;
}

.cts-chart-explanation h4 {
    margin-top: 0;
    color: #002654;
    font-size: 20px;
    margin-bottom: 20px;
}

.cts-chart-explanation p {
    line-height: 1.8;
    color: #333;
    margin-bottom: 20px;
    font-size: 15px;
}

.cts-chart-explanation p:last-child {
    margin-bottom: 0;
}

.cts-chart-explanation strong {
    color: #002654;
    font-weight: 700;
}

.cts-explanation-list {
    margin: 20px 0;
    padding-left: 0;
    list-style: none;
}

.cts-explanation-list li {
    margin: 15px 0;
    padding-left: 25px;
    position: relative;
    line-height: 1.7;
}

.cts-explanation-list li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: #C8102E;
    font-weight: bold;
    font-size: 18px;
}

.cts-chart-note {
    margin-top: 20px;
    font-size: 14px;
    color: #6c757d;
    text-align: center;
    line-height: 1.6;
}

/* Comparison Section */
.cts-comparison-section {
    margin: 40px 0;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 8px;
}

.cts-comparison-section h3 {
    margin-top: 0;
    color: #002654;
}

.cts-filter-buttons {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.cts-filter-btn {
    padding: 10px 20px;
    background: white;
    border: 2px solid #dee2e6;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.cts-filter-btn:hover {
    border-color: #002654;
}

.cts-filter-btn.active {
    background: #002654;
    color: white;
    border-color: #002654;
}

.cts-comparison-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 25px;
}

.cts-comparison-card {
    background: white;
    padding: 20px;
    border-radius: 6px;
    text-align: center;
}

.cts-comparison-label {
    font-size: 13px;
    color: #6c757d;
    font-weight: 600;
    text-transform: uppercase;
}

.cts-comparison-value {
    font-size: 28px;
    font-weight: 700;
    color: #002654;
    margin-top: 10px;
}

.cts-comparison-value.excellent {
    color: #28a745;
}

.cts-comparison-value.good {
    color: #17a2b8;
}

.cts-context {
    display: block;
    font-size: 12px;
    font-weight: 500;
    margin-top: 4px;
}

/* Action Buttons */
.cts-action-buttons {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Social Sharing */
.cts-social-sharing {
    margin: 40px 0 0;
    padding: 30px;
    background: white;
    border-radius: 8px;
    border: 2px solid #e9ecef;
    text-align: center;
}

.cts-social-sharing h3 {
    margin-top: 0;
    color: #002654;
    font-size: 20px;
}

.cts-social-sharing p {
    color: #6c757d;
    margin-bottom: 25px;
}

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

.cts-share-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
}

.cts-share-icon {
    font-size: 18px;
    font-weight: bold;
}

.cts-share-linkedin {
    background: #0077B5;
}

.cts-share-linkedin:hover {
    background: #006399;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 119, 181, 0.3);
}

.cts-share-twitter {
    background: #000000;
}

.cts-share-twitter:hover {
    background: #333333;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.cts-share-facebook {
    background: #1877F2;
}

.cts-share-facebook:hover {
    background: #145dbf;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(24, 119, 242, 0.3);
}

.cts-share-copy {
    background: #6c757d;
}

.cts-share-copy:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

.cts-share-copy.copied {
    background: #28a745;
}

/* Action Buttons */
.cts-action-buttons {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Social Sharing */
.cts-social-sharing {
    margin: 40px 0;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 8px;
    text-align: center;
}

.cts-social-sharing h3 {
    margin-top: 0;
    color: #002654;
}

.cts-social-sharing p {
    color: #6c757d;
    margin-bottom: 25px;
}

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

.cts-share-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
}

.cts-share-btn svg {
    flex-shrink: 0;
}

.cts-share-linkedin {
    background: #0077B5;
}

.cts-share-linkedin:hover {
    background: #006399;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 119, 181, 0.3);
}

.cts-share-twitter {
    background: #000000;
}

.cts-share-twitter:hover {
    background: #333333;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.cts-share-facebook {
    background: #1877F2;
}

.cts-share-facebook:hover {
    background: #0d65d9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(24, 119, 242, 0.3);
}

.cts-share-copy {
    background: #6c757d;
}

.cts-share-copy:hover {
    background: #5a6268;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(108, 117, 125, 0.3);
}

.cts-share-copy.copied {
    background: #28a745;
}

/* Loading */
.cts-loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    color: white;
}

.cts-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.cts-loading p {
    margin-top: 20px;
    font-size: 18px;
}

/* No Credits */
.cts-no-credits {
    background: white;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
}

.cts-no-credits h3 {
    color: #002654;
    margin-top: 0;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .cts-container {
        padding: 0 15px;
        margin: 20px auto;
    }
    
    .cts-card,
    .cts-question-card,
    .cts-results-container {
        padding: 20px;
    }
    
    .cts-question {
        font-size: 18px;
    }
    
    .cts-answer-buttons {
        grid-template-columns: 1fr;
    }
    
    .cts-results-summary {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .cts-result-value {
        font-size: 32px;
    }
    
    .cts-result-label {
        font-size: 12px;
    }
    
    /* Chart fixes for mobile */
    .cts-chart-container {
        padding: 20px 15px;
        margin: 30px 0;
    }
    
    .cts-chart-container h3 {
        font-size: 18px;
    }
    
    #cts-calibration-chart {
        max-height: 300px;
        width: 100% !important;
        height: auto !important;
    }
    
    #cts-historical-chart {
        max-height: 300px;
        width: 100% !important;
        height: auto !important;
    }
    
    .cts-chart-explanation {
        padding: 20px 15px;
    }
    
    .cts-chart-explanation h4 {
        font-size: 16px;
    }
    
    .cts-chart-explanation p,
    .cts-chart-explanation li {
        font-size: 14px;
        line-height: 1.6;
    }
    
    .cts-personalized-feedback {
        padding: 15px;
        font-size: 14px;
    }
    
    /* Comparison section mobile */
    .cts-comparison-section {
        padding: 20px 15px;
    }
    
    .cts-comparison-results {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    
    .cts-comparison-card {
        padding: 15px 10px;
    }
    
    .cts-comparison-value {
        font-size: 22px;
    }
    
    /* Action buttons */
    .cts-action-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .cts-action-buttons .cts-button {
        width: 100%;
        padding: 12px 20px;
        font-size: 15px;
    }
    
    /* Social sharing mobile */
    .cts-social-sharing {
        padding: 20px 15px;
    }
    
    .cts-share-buttons {
        flex-direction: column;
        gap: 8px;
    }
    
    .cts-share-btn {
        width: 100%;
        justify-content: center;
        font-size: 14px;
        padding: 12px 20px;
    }
}

/* Extra small devices (phones in portrait) */
@media (max-width: 480px) {
    .cts-result-card {
        padding: 20px 15px;
    }
    
    .cts-result-value {
        font-size: 28px;
    }
    
    .cts-comparison-results {
        grid-template-columns: 1fr;
    }
    
    .cts-chart-goal,
    .cts-personalized-feedback {
        padding: 12px 15px;
        font-size: 13px;
    }
}

/* ── Multi-format question button layouts ───────────────────────────── */

/* A/B: two columns, same as T/F but with lettered buttons */
.cts-answer-buttons--ab {
    grid-template-columns: 1fr 1fr;
}

/* A/B/C/D: 2x2 grid */
.cts-answer-buttons--abcd {
    grid-template-columns: 1fr 1fr;
}

/* Lettered button style */
.cts-answer-btn--lettered {
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    gap: 14px;
    padding: 18px 20px;
    font-size: 16px;
    text-align: left;
}

.cts-answer-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    min-width: 36px;
    background: #f0f3f7;
    border: 2px solid #dee2e6;
    border-radius: 50%;
    font-size: 15px;
    font-weight: 800;
    color: #002654;
    transition: all 0.2s;
}

.cts-answer-btn--lettered:hover .cts-answer-letter {
    background: #002654;
    border-color: #002654;
    color: #fff;
}

.cts-answer-btn--lettered.selected .cts-answer-letter {
    background: #C8102E;
    border-color: #C8102E;
    color: #fff;
}

/* Responsive: stack to single column on small screens for abcd */
@media (max-width: 480px) {
    .cts-answer-buttons--abcd {
        grid-template-columns: 1fr;
    }
    .cts-answer-buttons--ab {
        grid-template-columns: 1fr 1fr;
    }
}

/* ============================================================
   Quiz Set Selector — v6.0
   Add to: wp-content/plugins/calibration-test-pro/assets/css/style.css
   ============================================================ */

/* ── Selector wrapper ──────────────────────────────────────── */
.cts-quiz-selector {
    margin: 0 auto 32px;
    max-width: 760px;
}

.cts-quiz-selector__title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 6px;
    text-align: center;
}

.cts-quiz-selector__subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 24px;
}

/* ── Quiz cards grid ───────────────────────────────────────── */
.cts-quiz-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

.cts-quiz-card {
    border: 2px solid #ddd;
    border-radius: 10px;
    padding: 18px 20px;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.1s;
    background: #fff;
    user-select: none;
}

.cts-quiz-card:hover:not(.cts-quiz-card--disabled) {
    border-color: #4a90e2;
    box-shadow: 0 2px 10px rgba(74,144,226,0.2);
    transform: translateY(-2px);
}

.cts-quiz-card--selected {
    border-color: #4a90e2 !important;
    background: #f0f7ff !important;
    box-shadow: 0 2px 12px rgba(74,144,226,0.25);
}

.cts-quiz-card--disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.cts-quiz-card__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
}

.cts-quiz-card__name {
    font-weight: 700;
    font-size: 1rem;
    line-height: 1.3;
}

.cts-quiz-card__badge {
    flex-shrink: 0;
    background: #4a90e2;
    color: #fff;
    font-size: 0.72rem;
    font-weight: 600;
    border-radius: 20px;
    padding: 3px 9px;
    white-space: nowrap;
}

.cts-quiz-card__desc {
    font-size: 0.85rem;
    color: #555;
    margin: 0 0 12px;
    line-height: 1.5;
}

.cts-quiz-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.82rem;
}

.cts-quiz-card__cost {
    color: #4a90e2;
    font-weight: 600;
}

.cts-quiz-card__no-credits {
    color: #c0392b;
    font-size: 0.78rem;
}

/* ── Credits info ──────────────────────────────────────────── */
.cts-credits-info {
    text-align: center;
    font-size: 0.9rem;
    color: #555;
    margin-top: 12px;
}

.cts-credits-info--zero {
    color: #c0392b;
}

/* ── Start note (shows selected quiz name) ─────────────────── */
.cts-start-note {
    text-align: center;
    color: #666;
    font-size: 0.85rem;
    margin-top: 8px;
    min-height: 1.2em;
}

/* ── Academic note ─────────────────────────────────────────── */
.cts-academic-note {
    font-size: 0.8rem;
    color: #888;
    margin-top: 12px;
    border-left: 3px solid #ddd;
    padding-left: 10px;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 500px) {
    .cts-quiz-cards {
        grid-template-columns: 1fr;
    }
    .cts-quiz-card__header {
        flex-direction: column;
    }
}