/* Adaptive Zero - Modern Design System */
:root {
    --az-primary: #0073aa;
    --az-primary-dark: #005177;
    --az-accent: #00a0d2;
    --az-success: #46b450;
    --az-warning: #ffb900;
    --az-danger: #dc3232;
    --az-surface: #ffffff;
    --az-bg: #f8f9fa;
    --az-text-main: #2c3338;
    --az-text-mute: #646970;
    --az-border: #dcdcde;
    --az-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --az-shadow-hover: 0 8px 16px rgba(0, 0, 0, 0.1);
    --az-radius: 12px;
    --az-spacing: 20px;
    --az-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

/* === Global Wrappers === */
.az-wrapper {
    font-family: var(--az-font);
    color: var(--az-text-main);
    line-height: 1.6;
    max-width: 1000px;
    margin: 0 auto;
}

/* === Cards === */
.az-card {
    background: var(--az-surface);
    border-radius: var(--az-radius);
    padding: var(--az-spacing);
    box-shadow: var(--az-shadow);
    border: 1px solid var(--az-border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-bottom: var(--az-spacing);
}
.az-card:hover {
    box-shadow: var(--az-shadow-hover);
    transform: translateY(-2px);
}

/* === Buttons === */
.az-btn {
    display: inline-block;
    padding: 10px 20px;
    background: var(--az-primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s;
}
.az-btn:hover {
    background: var(--az-primary-dark);
    color: #fff;
}
.az-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* === Dashboard === */
.az-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--az-spacing);
}
.az-dashboard-wide {
    grid-column: 1 / -1;
}

.az-mastery-map {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}
.az-mastery-item {
    padding: 14px;
    border: 1px solid var(--az-border);
    border-radius: 8px;
    background: var(--az-bg);
}
.az-mastery-item-header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}
.az-mastery-score {
    color: var(--az-primary-dark);
    font-weight: 700;
}
.az-mastery-track {
    height: 10px;
    overflow: hidden;
    background: #e5e7eb;
    border-radius: 999px;
}
.az-mastery-fill {
    display: block;
    height: 100%;
    border-radius: inherit;
}
.az-mastery-mastered { background: var(--az-success); }
.az-mastery-developing { background: var(--az-primary); }
.az-mastery-practice { background: var(--az-warning); }
.az-mastery-meta {
    display: block;
    margin-top: 8px;
    color: var(--az-text-mute);
}

.az-stat-card {
    text-align: center;
    padding: 30px;
}

.az-stat-value {
    font-size: 2.5em;
    font-weight: 800;
    color: var(--az-primary);
    margin: 10px 0;
}

#az-final-results .az-step-chart {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 8px;
    min-height: 76px;
    margin: 18px auto 4px;
    padding: 0 12px 8px;
    border-bottom: 1px solid var(--az-border);
}

#az-final-results .az-chart-bar {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    flex: 1 1 32px;
    max-width: 48px;
    min-width: 24px;
    padding-bottom: 2px;
    border-radius: 5px 5px 0 0;
    background: var(--az-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
}

.az-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}
.az-table th {
    text-align: left;
    padding: 12px;
    background: var(--az-bg);
    border-bottom: 2px solid var(--az-border);
    font-weight: 600;
}
.az-table td {
    padding: 12px;
    border-bottom: 1px solid var(--az-border);
}

/* === Quiz Interface === */
.az-quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--az-spacing);
    border-bottom: 1px solid var(--az-border);
    padding-bottom: 15px;
}

.az-score-badge {
    background: var(--az-bg);
    padding: 5px 12px;
    border-radius: 20px;
    font-weight: bold;
    color: var(--az-primary-dark);
    border: 1px solid var(--az-border);
}

.az-option-label {
    display: flex;
    align-items: center;
    padding: 15px;
    margin-bottom: 10px;
    background: var(--az-bg);
    border: 1px solid var(--az-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}
.az-option-label:hover {
    background: #fff;
    border-color: var(--az-primary);
    box-shadow: 0 2px 8px rgba(0,115,170,0.15);
}
.az-option-label input {
    margin-right: 12px;
}

/* === Reviewed solution tabs and Recovery Results === */
.az-review-tabs {
    margin-top: 16px;
    border: 1px solid var(--az-border);
    border-radius: 10px;
    overflow: hidden;
    background: #fff;
    text-align: left;
}
.az-review-tablist {
    display: flex;
    gap: 4px;
    padding: 8px;
    overflow-x: auto;
    background: var(--az-bg);
    border-bottom: 1px solid var(--az-border);
}
.az-review-tab {
    flex: 1 0 auto;
    padding: 9px 12px;
    border: 1px solid transparent;
    border-radius: 7px;
    background: transparent;
    color: var(--az-text-main);
    font-weight: 700;
    cursor: pointer;
}
.az-review-tab:hover:not(:disabled),
.az-review-tab.is-active {
    color: var(--az-primary-dark);
    background: #fff;
    border-color: var(--az-primary);
}
.az-review-tab:disabled {
    color: var(--az-text-mute);
    cursor: not-allowed;
    opacity: .6;
}
.az-review-panel {
    padding: 16px;
    line-height: 1.65;
    overflow-wrap: anywhere;
}
.az-review-unavailable {
    margin: 12px 0 0;
    color: var(--az-text-mute);
    font-size: .92em;
}
.az-completed-review {
    margin: 30px 0;
    text-align: left;
}
.az-review-item {
    margin-top: 14px;
    padding: 18px;
    border: 1px solid var(--az-border);
    border-left: 5px solid var(--az-danger);
    border-radius: 10px;
    background: #fff;
}
.az-review-item.is-correct { border-left-color: var(--az-success); }
.az-review-item-heading,
.az-review-answer-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}
.az-review-item-heading span {
    font-weight: 700;
    color: var(--az-danger);
}
.az-review-item.is-correct .az-review-item-heading span { color: var(--az-success); }
.az-review-answer-row {
    padding: 10px 12px;
    border-radius: 8px;
    background: var(--az-bg);
    font-size: .92em;
}
.az-recovery-results {
    margin: 26px 0;
    padding: 22px;
    border: 1px solid #a7f3d0;
    border-radius: 12px;
    background: linear-gradient(145deg, #f0fdf4, #ecfeff);
    text-align: left;
}
.az-recovery-results h3 { margin: 10px 0 16px; }
.az-recovery-comparison {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 16px;
}
.az-recovery-comparison > div:not(.az-recovery-arrow) {
    display: grid;
    gap: 3px;
    padding: 15px;
    border-radius: 9px;
    background: #fff;
    text-align: center;
}
.az-recovery-comparison strong { font-size: 1.65em; color: var(--az-primary-dark); }
.az-recovery-arrow { display: grid; justify-items: center; color: var(--az-primary); }
.az-recovery-arrow strong { font-size: .8em; white-space: nowrap; }
.az-recovery-note { display: block; margin-top: 10px; color: var(--az-text-mute); }

.az-ai-tutor-tools {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 18px;
    padding: 14px;
    border: 1px solid #bae6d3;
    border-radius: 10px;
    background: #f0fdf7;
}
.az-ai-tutor-tools[hidden],
.az-ai-tutor-response[hidden] { display: none !important; }
.az-ai-tutor-tools span,
.az-ai-tutor-response small { color: var(--az-text-mute); }
.az-ai-tutor-response {
    margin-top: 12px;
    padding: 15px 17px;
    border-left: 4px solid var(--az-primary);
    border-radius: 8px;
    background: #f8fafc;
}
.az-ai-tutor-response p { margin: 7px 0; line-height: 1.55; }
.az-btn-secondary { background: var(--az-primary-dark); }

/* Editor-only R&W Teaching Preview topic picker. */
.az-rw-preview-quiz #az-start-screen { padding: 20px 0 8px !important; }
.az-rw-preview-quiz #az-question-container,
.az-rw-preview-quiz #az-end-screen { max-width: 820px; margin-inline: auto; }
.az-rw-selected-topic { display: block; color: var(--az-primary-dark); font-weight: 600; }
.az-rw-selected-topic[hidden] { display: none; }
.az-rw-current-topic { margin-left: 7px; background: #e8f6ef; color: #0f6244; }
.az-rw-current-topic[hidden] { display: none; }
.az-rw-topic-picker { margin: 0 0 24px; text-align: left; }
.az-rw-topic-intro { display: flex; align-items: start; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.az-rw-topic-intro h4 { margin: 0 0 4px; font-size: clamp(1.2rem, 2.4vw, 1.65rem); line-height: 1.25; }
.az-rw-topic-intro h4 small { display: block; color: var(--az-text-mute); font-size: .62em; font-weight: 500; }
.az-rw-topic-intro p { margin: 0; color: var(--az-text-mute); }
.az-rw-topic-total { white-space: nowrap; color: var(--az-primary-dark); font-weight: 700; }
.az-rw-topic-domains { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 12px; }
.az-rw-topic-domain { border: 1px solid var(--az-border); border-radius: 12px; background: #fff; min-width: 0; }
.az-rw-topic-domain[open] { grid-column: 1 / -1; }
.az-rw-topic-domain summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 15px 18px; cursor: pointer; }
.az-rw-topic-domain summary::-webkit-details-marker { display: none; }
.az-rw-topic-domain summary::before { content: '+'; color: var(--az-primary); font-size: 1.3rem; line-height: 1; }
.az-rw-topic-domain[open] summary::before { content: '−'; }
.az-rw-topic-domain summary > span { flex: 1; }
.az-rw-topic-domain summary strong,
.az-rw-topic-domain summary small { display: block; }
.az-rw-topic-domain summary small { color: var(--az-text-mute); font-size: .84em; }
.az-rw-topic-domain summary em,
.az-rw-topic-choice em { color: var(--az-primary-dark); font-size: .82em; font-style: normal; font-weight: 700; white-space: nowrap; }
.az-rw-topic-domain-body { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; padding: 0 16px 16px; }
.az-rw-topic-skill { min-width: 0; }
.az-rw-topic-skill h5 { margin: 10px 0 8px; font-size: 1rem; }
.az-rw-topic-skill h5 small { display: block; color: var(--az-text-mute); font-size: .82em; font-weight: 500; }
.az-rw-topic-list { display: grid; gap: 7px; }
.az-rw-topic-choice { display: flex; align-items: center; gap: 10px; padding: 11px 13px; border: 1px solid var(--az-border); border-radius: 9px; cursor: pointer; background: #fff; }
.az-rw-topic-choice:hover,
.az-rw-topic-choice:focus-within { border-color: var(--az-primary); background: #f5fbff; }
.az-rw-topic-choice:has(input:checked) { border-color: var(--az-primary); background: #ecf7fc; box-shadow: inset 0 0 0 1px var(--az-primary); }
.az-rw-topic-choice input { flex: none; accent-color: var(--az-primary); }
.az-rw-topic-choice span { flex: 1; min-width: 0; }
.az-rw-topic-choice strong,
.az-rw-topic-choice small { display: block; }
.az-rw-topic-choice small { color: var(--az-text-mute); font-size: .78em; }
.az-rw-topic-all { background: #f7fbfd; }
.az-rw-topic-start { min-width: 220px; }

@media (max-width: 640px) {
    .az-review-item-heading,
    .az-review-answer-row { align-items: flex-start; flex-direction: column; }
    .az-recovery-comparison { grid-template-columns: 1fr; }
    .az-recovery-arrow { transform: rotate(90deg); }
    .az-recovery-arrow strong { display: none; }
    .az-rw-topic-intro { flex-direction: column; }
    .az-rw-topic-domains,
    .az-rw-topic-domain-body { grid-template-columns: 1fr; }
    .az-rw-topic-domain[open] { grid-column: auto; }
    .az-rw-preview-quiz { padding: 16px; }
}

/* === Course & Lesson === */
.az-course-header {
    background: linear-gradient(135deg, var(--az-primary), var(--az-primary-dark));
    color: #fff;
    padding: 40px;
    border-radius: var(--az-radius);
    margin-bottom: 30px;
    text-align: center;
}
.az-course-header h2 {
    color: #fff;
    margin: 0;
    font-size: 2em;
}

.az-lesson-list li {
    background: #fff;
    border-bottom: 1px solid var(--az-border);
    padding: 0;
    transition: background 0.2s;
}
.az-lesson-list li:last-child {
    border-bottom: none;
}
.az-lesson-list a {
    display: block;
    padding: 20px;
    color: var(--az-text-main);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.az-lesson-list a:hover {
    background: var(--az-bg);
    color: var(--az-primary);
}
.az-lesson-list a::after {
    content: '→';
    opacity: 0.5;
}

/* === Lesson Page === */
.az-lesson-content {
    font-size: 1.1em;
    margin-bottom: 40px;
}
.az-lesson-footer {
    display: flex;
    justify-content: space-between;
    border-top: 1px solid var(--az-border);
    padding-top: 20px;
}

/* === Utility === */
.az-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85em;
    font-weight: 600;
    text-transform: uppercase;
}
.az-badge-success { background: #e0f5e1; color: var(--az-success); }
.az-badge-warning { background: #fff8e1; color: var(--az-warning); }
.az-badge-blue { background: #e1f0fa; color: var(--az-primary); }

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.az-animate-fade {
    animation: fadeIn 0.4s ease-out;
}
.az-topic-result{margin:20px 0;padding:20px;border:1px solid #c6e7df;border-radius:14px;background:#f2fbf8;text-align:left}.az-topic-result-kicker{margin:0;color:#14665b;font-size:.84rem;font-weight:700}.az-topic-result h3{margin:7px 0 5px;color:#123c39}.az-topic-result p{line-height:1.55}.az-topic-result-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:15px}.az-topic-result-actions a{display:inline-block;padding:9px 13px;border-radius:9px;background:#116c69;color:#fff;text-decoration:none;font-weight:700}.az-topic-result-actions a:hover,.az-topic-result-actions a:focus{background:#0a4f4d;color:#fff}