/* 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-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;
}

/* === 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;
}