/* css/review-manager.css */

/* Review Page Styles */
.review-page {
    background: rgba(255, 255, 255, 0.9);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-sizing: border-box;
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color-light);
}

.review-header h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin: 0;
}

.review-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

/* Filters Panel */
.filters-panel {
    margin-bottom: 25px;
    background: #f8fafc;
    padding: 20px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color-light);
    box-sizing: border-box;
}

.filters-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.filter-group {
    display: flex;
    flex-direction: column;
}

.filter-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.filter-group select {
    padding: 10px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color-light);
    font-size: 0.9rem;
    background: white;
    box-sizing: border-box;
    width: 100%;
}

/* Review Statistics */
.review-stats {
    margin-bottom: 25px;
}

.stats-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.stat-item {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(240, 147, 251, 0.03));
    padding: 15px;
    border-radius: var(--border-radius-md);
    text-align: center;
    border: 1px solid rgba(102, 126, 234, 0.1);
    box-sizing: border-box;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Incorrect Questions List */
.incorrect-questions-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.incorrect-question-card {
    background: white;
    border-radius: var(--border-radius-md);
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    border: 1px solid var(--border-color-light);
    transition: var(--transition);
    box-sizing: border-box;
}

.incorrect-question-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}

.question-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.question-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.8rem;
}
.question-source {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    padding: 3px 8px;
    border-radius: 4px;
}
.question-section {
    background: rgba(0,0,0,0.05);
    color: var(--text-muted);
    padding: 3px 8px;
    border-radius: 4px;
}

.question-actions button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 5px;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}
.question-actions button:hover { background: rgba(0,0,0,0.05); }
.mark-btn.marked { color: var(--warning-color); }

.question-content .question-text {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 15px;
}
.question-options {
    margin: 15px 0;
}
.question-options .option {
    padding: 8px 12px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.option.correct { background: rgba(72, 187, 120, 0.1); }
.option.user-choice:not(.correct) { background: rgba(229, 62, 62, 0.1); }
.option-label { font-weight: 500; }
.correct-mark, .wrong-mark { margin-left: auto; font-weight: bold; }
.correct-mark { color: var(--success-color); }
.wrong-mark { color: var(--error-color); }

.question-explanation {
    margin-top: 10px;
    padding: 10px;
    background: #f8fafc;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-left: 3px solid var(--primary-color);
}
.question-explanation strong { color: var(--text-primary); }

.question-card-footer {
    margin-top: 15px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color-light);
}

.question-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
}
.mastery-level { color: var(--warning-color); }

/* Review Container (Modal) */
.review-container {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-body);
    z-index: 1500;
    padding: 0;
    overflow: hidden;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                right 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* MODIFIED: When HTML has sidebar-active class, shift the review container */
html.sidebar-active .review-container {
    /* right: var(--sidebar-width-desktop); <-- JS 会直接更新 */
    /* left: 0; */ /* left 保持为0 */
    /* width: calc(100% - var(--sidebar-width-desktop)); <-- JS 会直接更新 */
}

.review-wrapper {
    display: flex;
    flex-direction: column;
    width: 100%; height: 100vh;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    box-sizing: border-box;
}
.review-header {
    text-align: center;
    padding: 20px 25px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-bottom: 1px solid var(--border-color-light);
    position: relative;
    flex-shrink: 0;
    box-sizing: border-box;
}
.review-close-btn {
    position: absolute;
    top: 15px; right: 15px;
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    border: none;
    border-radius: 50%;
    width: 36px; height: 36px;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    z-index: 1;
}
.review-close-btn:hover { background: rgba(255, 255, 255, 0.4); }

.review-progress-container {
    width: calc(100% - 50px); margin: 15px auto;
    background: #f7fafc; border-radius: 50px; height: 18px;
    overflow: hidden; box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
    flex-shrink: 0;
    box-sizing: border-box;
}
.review-progress-bar {
    width: 0%; height: 100%;
    background: linear-gradient(90deg, var(--success-color), var(--primary-color));
    text-align: center; line-height: 18px; color: white;
    transition: width 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
    font-size: 0.75em; font-weight: 600;
}

.review-content-area {
    flex-grow: 1; overflow-y: auto; padding: 0 25px 15px 25px;
    box-sizing: border-box;
}
#reviewQuestionArea {
    margin: 15px auto;
    max-width: 800px;
}

.review-question-block {
    background: var(--bg-card); padding: 20px; border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-card);
    position: relative;
}
.review-question-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(180deg, var(--warning-color) 0%, var(--primary-color) 100%);
    border-top-left-radius: var(--border-radius-md);
    border-bottom-left-radius: var(--border-radius-md);
}

.review-question-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 15px; padding-bottom: 10px; border-bottom: 1px solid var(--border-color-light);
}
.question-source-info { font-size: 0.8rem; color: var(--text-muted); }
.question-mastery { font-size: 0.9rem; color: var(--warning-color); }

.review-question-content .question-text {
    font-size: 1.15rem;
    line-height: 1.6;
    margin-bottom: 15px;
}
.review-options {
    display: grid; gap: 10px; margin: 15px 0;
}
.review-options .review-option {
    display: flex; align-items: center; padding: 12px 15px;
    border-radius: var(--border-radius-sm); background: #f7fafc; cursor: pointer;
    border: 2px solid transparent; color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    box-sizing: border-box;
}
.review-options .review-option.view-mode { cursor: default; }

/* Custom radio/checkbox for review options */
.review-options .review-option .custom-radio,
.review-options .review-option .custom-checkbox {
    width: 18px; height: 18px;
    border: 2px solid var(--border-color-light);
    margin-right: 12px; flex-shrink: 0; position: relative;
    transition: var(--transition);
}
.review-options .review-option .custom-radio { border-radius: 50%; }
.review-options .review-option .custom-checkbox { border-radius: 3px; }

/* Checked states for custom radio/checkbox in review mode */
.review-options input[type="radio"]:checked + .custom-radio { border-color: var(--primary-color); }
.review-options input[type="radio"]:checked + .custom-radio::after {
    content: ''; width: 10px; height: 10px; background: var(--primary-color);
    border-radius: 50%; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
}
.review-options input[type="checkbox"]:checked + .custom-checkbox { border-color: var(--primary-color); background-color: var(--primary-color); }
.review-options input[type="checkbox"]:checked + .custom-checkbox::after {
    content: ''; width: 5px; height: 10px; border: solid white; border-width: 0 3px 3px 0;
    position: absolute; top: 45%; left: 50%; transform: translate(-50%, -50%) rotate(45deg);
}
.review-options .review-option.selected-option {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15), rgba(240, 147, 251, 0.1));
    border-color: var(--primary-color);
    color: var(--text-primary);
    font-weight: 600;
}


/* Highlight after submission (or in view mode) */
.review-options .review-option.correct-highlight {
    background: rgba(72, 187, 120, 0.1) !important;
    border-color: var(--success-color) !important;
    color: var(--text-primary) !important;
    font-weight: 600;
}
.review-options .review-option.incorrect-highlight {
    background: rgba(229, 62, 62, 0.1) !important;
    border-color: var(--error-color) !important;
    color: var(--text-primary) !important;
}
.review-options .review-option.missed-correct-highlight {
    background: var(--missed-correct-bg) !important;
    border-color: var(--missed-correct-color) !important;
    color: var(--text-primary) !important;
}


.review-explanation, .review-history {
    margin-top: 15px; padding: 12px; background: #f8fafc;
    border-radius: var(--border-radius-sm); font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    box-sizing: border-box;
}
.review-explanation h4 {
    font-size: 1em;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.review-history p {
    margin: 5px 0;
}


.review-result {
    margin-top: 15px; padding: 15px; border-radius: var(--border-radius-md);
    box-sizing: border-box;
    animation: fadeInExplanation 0.4s ease-out 0.2s forwards;
    opacity: 0;
}
.review-result.correct { background: rgba(72, 187, 120, 0.1); border-left: 3px solid var(--success-color); }
.review-result.incorrect { background: rgba(229, 62, 62, 0.1); border-left: 3px solid var(--error-color); }
.result-header { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 1.1rem; margin-bottom: 10px; }
.result-header .result-icon { font-size: 1.3rem; }
.result-details, .result-explanation {
    margin-top: 10px;
    font-size: 0.9em;
    color: var(--text-secondary);
    line-height: 1.6;
}
.result-details strong, .result-explanation strong {
    color: var(--text-primary);
}


.review-navigation-controls {
    padding: 15px 25px; border-top: 1px solid var(--border-color-light);
    background: linear-gradient(135deg, rgba(255,255,255,0.7), rgba(250,250,252,0.8));
    backdrop-filter: blur(10px);
    flex-shrink: 0;
    box-sizing: border-box;
}
.review-navigation-buttons {
    display: flex; justify-content: space-between; gap: 10px;
}
#reviewSubmitBtn {
    background: linear-gradient(135deg, var(--success-color), #38a169);
    color: white;
    box-shadow: 0 4px 15px rgba(var(--success-rgb), 0.3);
}
#reviewSubmitBtn:hover:not([disabled]) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(var(--success-rgb), 0.4);
}


/* Responsive Design for Review Manager */
@media (max-width: 768px) {
    /* On mobile, sidebar is an overlay, so review-container remains full screen */
    html.sidebar-active .review-container {
        left: 0;
        right: 0;
        width: 100%;
    }

    .review-page {
        padding: 20px;
    }
    .review-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    .review-header h2 {
        font-size: 1.5rem;
    }
    .review-actions {
        width: 100%;
        justify-content: space-between;
    }
    .action-btn {
        flex-grow: 1;
        justify-content: center;
        padding: 8px 15px;
        font-size: 0.85rem;
    }
    .filters-panel {
        padding: 15px;
    }
    .filters-row {
        grid-template-columns: 1fr;
    }
    .review-stats .stats-summary {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .stat-item {
        padding: 12px;
    }
    .stat-value {
        font-size: 1.3rem;
    }
    .stat-label {
        font-size: 0.8rem;
    }
    .incorrect-question-card {
        padding: 15px;
    }
    .question-content .question-text {
        font-size: 1rem;
    }
    .question-meta {
        font-size: 0.75rem;
    }
    .question-actions button {
        width: 28px;
        height: 28px;
        font-size: 1rem;
    }

    .review-container {
        padding: 0;
    }
    .review-header {
        padding: 15px 20px;
    }
    .review-close-btn {
        top: 10px;
        right: 10px;
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
    .review-progress-container {
        width: calc(100% - 30px);
        margin: 10px auto;
    }
    .review-content-area {
        padding: 0 15px 10px 15px;
    }
    .review-question-block {
        padding: 15px;
    }
    .review-question-content .question-text {
        font-size: 1.05rem;
    }
    .review-options .review-option {
        padding: 10px 12px;
        font-size: 0.9rem;
    }
    .review-navigation-controls {
        padding: 12px 15px;
    }
    .review-navigation-buttons {
        flex-direction: column;
        gap: 8px;
    }
    .nav-btn, #reviewSubmitBtn {
        width: 100%;
        min-width: unset;
        padding: 8px 12px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .review-page, .statistics-page {
        padding: 15px;
    }
    .review-header h2, .statistics-header h2 {
        font-size: 1.3rem;
    }
    .stats-summary {
        grid-template-columns: 1fr;
    }
    .stat-item {
        padding: 10px;
    }
    .stat-value {
        font-size: 1.1rem;
    }
    .stat-label {
        font-size: 0.75rem;
    }
    .incorrect-question-card {
        padding: 12px;
    }
    .question-content .question-text {
        font-size: 0.95rem;
    }
    .question-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    .question-actions button {
        width: 24px;
        height: 24px;
        font-size: 0.9rem;
    }
    .review-progress-container {
        height: 16px;
    }
    .review-progress-bar {
        line-height: 16px;
        font-size: 0.7rem;
    }
    .review-question-block {
        padding: 12px;
    }
    .review-question-content .question-text {
        font-size: 0.95rem;
    }
    .review-options .review-option {
        padding: 8px 10px;
        font-size: 0.8rem;
    }
    .review-navigation-controls {
        padding: 10px 12px;
    }
    .nav-btn, #reviewSubmitBtn {
        padding: 6px 10px;
        font-size: 0.75rem;
    }
}