/* ===== Quiz Pages ===== */

.quiz-page {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.quiz-message {
    text-align: center;
    padding: 3rem 1.5rem;
}

.quiz-message h2 {
    margin-bottom: 0.75rem;
}

.quiz-message p {
    color: var(--text-secondary, #6b7280);
    margin-bottom: 0.5rem;
}

/* Quiz Container — Taking a quiz */
.quiz-container {
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #e1e4e8);
    border-radius: 12px;
    overflow: hidden;
}

.quiz-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color, #e1e4e8);
}

.quiz-header h1 {
    font-size: 1.5rem;
    margin: 0 0 0.25rem;
}

.quiz-meta {
    color: var(--text-secondary, #6b7280);
    font-size: 0.875rem;
    margin: 0;
}

/* Individual Question */
.quiz-question {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color, #e1e4e8);
}

.quiz-question:last-of-type {
    border-bottom: none;
}

.quiz-question-number {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary, #6b7280);
    margin-bottom: 0.5rem;
}

.quiz-question-text {
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 1rem;
}

/* Options */
.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.quiz-option {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color, #e1e4e8);
    border-radius: 8px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

.quiz-option:hover {
    border-color: var(--accent-color, #2563eb);
    background: var(--bg-hover, rgba(37, 99, 235, 0.04));
}

.quiz-option.selected {
    border-color: var(--accent-color, #2563eb);
    background: var(--bg-hover, rgba(37, 99, 235, 0.08));
}

.quiz-option input[type="radio"] {
    margin-top: 2px;
    flex-shrink: 0;
}

.quiz-option-label {
    font-weight: 600;
    min-width: 20px;
    color: var(--text-secondary, #6b7280);
}

.quiz-option-text {
    flex: 1;
    line-height: 1.4;
}

/* Submit Section */
.quiz-submit-section {
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color, #e1e4e8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.quiz-answered-count {
    color: var(--text-secondary, #6b7280);
    font-size: 0.875rem;
    margin: 0;
}

/* ===== Quiz Result ===== */

.quiz-result-container {
    max-width: 500px;
    margin: 0 auto;
}

.quiz-result-card {
    text-align: center;
    padding: 3rem 2rem;
    border-radius: 12px;
    border: 2px solid var(--border-color, #e1e4e8);
}

.quiz-result-card.result-passed {
    border-color: #22c55e;
    background: rgba(34, 197, 94, 0.04);
}

.quiz-result-card.result-failed {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.04);
}

.quiz-result-icon {
    margin-bottom: 1rem;
}

.result-passed .quiz-result-icon { color: #22c55e; }
.result-failed .quiz-result-icon { color: #ef4444; }

.quiz-result-status {
    font-size: 1.75rem;
    margin: 0 0 1.5rem;
}

.result-passed .quiz-result-status { color: #16a34a; }
.result-failed .quiz-result-status { color: #dc2626; }

.quiz-result-score {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.score-big {
    font-size: 2.5rem;
    font-weight: 700;
}

.score-percent {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary, #6b7280);
}

.quiz-result-attempt {
    color: var(--text-secondary, #6b7280);
    font-size: 0.875rem;
    margin-bottom: 2rem;
}

.quiz-result-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
}

/* Attempt History */
.quiz-history {
    margin-top: 2rem;
}

.quiz-history h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.quiz-attempt-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color, #e1e4e8);
    border-radius: 8px;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.quiz-attempt-summary.current {
    border-color: var(--accent-color, #2563eb);
    background: var(--bg-hover, rgba(37, 99, 235, 0.04));
}

.quiz-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
}

.badge-pass {
    background: #dcfce7;
    color: #16a34a;
}

.badge-fail {
    background: #fef2f2;
    color: #dc2626;
}

/* ===== Sidebar Quiz Link ===== */

.quiz-link-item {
    border-top: 1px dashed var(--border-color, #e1e4e8);
    margin-top: 0.25rem;
    padding-top: 0.25rem;
}

.quiz-link {
    font-weight: 500 !important;
}

.quiz-sidebar-badge {
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0 0.35rem;
    border-radius: 3px;
    background: #fef2f2;
    color: #dc2626;
    margin-left: 0.5rem;
}

/* Locked chapter styles */
.chapter-item.locked .chapter-toggle {
    opacity: 0.5;
}

.lesson-item.locked .lesson-link.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== Status Styles ===== */

.quiz-status-passed {
    color: #16a34a;
    font-weight: 600;
}

.quiz-status-failed {
    color: #dc2626;
    font-weight: 600;
}

.quiz-result-quiz-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary, #6b7280);
    margin: 0 0 0.5rem;
}

/* ===== Responsive — Tablet & Mobile ===== */

@media (max-width: 768px) {
    .quiz-page {
        margin: 1rem auto;
        padding: 0 1rem;
    }

    .quiz-header,
    .quiz-question {
        padding: 1.25rem;
    }

    .quiz-header h1 {
        font-size: 1.25rem;
    }

    .quiz-option {
        min-height: 48px;
        padding: 0.75rem;
    }

    .quiz-option input[type="radio"] {
        width: 20px;
        height: 20px;
    }

    .quiz-submit-section {
        flex-direction: column;
        padding: 1.25rem;
    }

    .quiz-submit-section .btn-lg {
        width: 100%;
    }

    .quiz-result-container {
        max-width: 100%;
    }

    .quiz-result-card {
        padding: 2rem 1.5rem;
    }

    .score-big {
        font-size: 2rem;
    }

    .quiz-result-actions .btn-lg {
        width: 100%;
    }

    .quiz-attempt-summary {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    .quiz-message {
        padding: 2rem 1rem;
    }
}

@media (max-width: 640px) {
    .quiz-header h1 {
        font-size: 1.125rem;
    }

    .quiz-question-text {
        font-size: 0.9375rem;
    }

    .quiz-option-text {
        font-size: 0.875rem;
    }

    .quiz-result-score {
        flex-direction: column;
        gap: 0.25rem;
    }

    .score-big {
        font-size: 1.75rem;
    }

    .score-percent {
        font-size: 1.25rem;
    }

    .quiz-result-status {
        font-size: 1.5rem;
    }
}

/* ===== Dark mode overrides ===== */
.dark .badge-pass {
    background: rgba(34, 197, 94, 0.15);
}

.dark .badge-fail {
    background: rgba(239, 68, 68, 0.15);
}

.dark .quiz-sidebar-badge {
    background: rgba(239, 68, 68, 0.15);
}