/* Chapter Container */
.chapter-container {
    padding: 20px;
    
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    margin: 0 auto;

}
.page-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 50px;  
    margin: 0px;         
    margin-top: 20px;
    
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    
}

/* Header */
.chapter-header {
    margin-bottom: 30px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.breadcrumb {
    color: #6c757d;
    margin-bottom: 10px;
}

.breadcrumb a {
    color: #667eea;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.chapter-header h1 {
    color: #2d3748;
    font-weight: 700;
    margin-bottom: 15px;
}

.chapter-meta {
    display: flex;
    gap: 20px;
    align-items: center;
}

.chapter-meta .badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.chapter-meta .progress {
    color: #4a5568;
}

/* Content Cards */
.content-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    font-size: 20px;
    margin-bottom: 30px;
    padding: 40px;
    
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
}

.card-header h2 {
    margin: 0;
    font-size: 1.5rem;
}

.card-body {
    padding: 30px;
}

.card-body .lead {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #4a5568;
    margin-bottom: 25px;
}

/* Important Note */
.important-note {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 20px;
    border-radius: 5px;
    margin: 25px 0;
}

.important-note h4 {
    color: #856404;
    margin-bottom: 10px;
}

.important-note p {
    color: #856404;
    margin-bottom: 10px;
}

/* Principles List */
.principles-list {
    list-style: none;
    padding: 0;
}

.principles-list li {
    margin-bottom: 25px;
    padding-left: 30px;
    position: relative;
}

.principles-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #48bb78;
    font-size: 1.2rem;
    font-weight: bold;
}

.principles-list li strong {
    display: block;
    color: #2d3748;
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.principles-list li p {
    color: #4a5568;
    margin: 0;
}

/* Citizenship Pledge */
.citizenship-pledge {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    margin: 30px 0;
}

.pledge-box blockquote {
    font-style: italic;
    color: #2d3748;
    border-left: 4px solid #667eea;
    padding-left: 20px;
    margin: 15px 0;
    font-size: 1.1rem;
    line-height: 1.6;
}

/* Responsibility Cards */
.responsibility-card, .freedom-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    height: 100%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.responsibility-card {
    border-top: 4px solid #e53e3e;
}

.freedom-card {
    border-top: 4px solid #48bb78;
}

.responsibility-card h4, .freedom-card h4 {
    color: #2d3748;
    margin-bottom: 15px;
}

.responsibility-card ul, .freedom-card ul {
    list-style: none;
    padding: 0;
}

.responsibility-card li, .freedom-card li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: #4a5568;
}

.responsibility-card li:before, .freedom-card li:before {
    content: "•";
    position: absolute;
    left: 10px;
    color: #e53e3e;
    font-size: 1.2rem;
}

.freedom-card li:before {
    color: #48bb78;
}

/* Requirements */
.requirements-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 25px;
    border-radius: 10px;
    margin: 25px 0;
    color: white;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.requirement-item {
    background: rgba(255,255,255,0.1);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    backdrop-filter: blur(10px);
}

.requirement-icon {
    font-size: 2rem;
    margin-bottom: 10px;
}

.requirement-item h5 {
    margin: 10px 0 5px;
    font-size: 1.1rem;
}

.requirement-item p {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Test Requirements */
.test-requirements {
    margin: 30px 0;
}

.and-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.requirement-card {
    display: flex;
    align-items: center;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    width: 100%;
}

.requirement-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 15px;
    flex-shrink: 0;
}

.requirement-content h5 {
    color: #2d3748;
    margin-bottom: 5px;
}

.requirement-content p {
    color: #4a5568;
    margin: 0;
}

.connector {
    background: #48bb78;
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: bold;
}

/* Important Notice */
.important-notice {
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 10px;
    padding: 20px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin: 25px 0;
}

.notice-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.notice-content h5 {
    color: #856404;
    margin-bottom: 8px;
}

.notice-content p {
    color: #856404;
    margin: 0;
}

/* Test Details */
.test-details, .handbook-info {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
}

.test-details ul, .handbook-info ul {
    list-style: none;
    padding: 0;
}

.test-details li, .handbook-info li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.test-details li:before, .handbook-info li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: #667eea;
}

/* Warning Box */
.warning-box {
    background: #f8d7da;
    border-left: 4px solid #e53e3e;
    padding: 15px;
    border-radius: 5px;
    margin: 20px 0;
}

.warning-box h5 {
    color: #721c24;
    margin-bottom: 5px;
}

.warning-box p {
    color: #721c24;
    margin: 0;
}

/* Important Warning */
.important-warning {
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 10px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    margin: 20px 0;
}

.warning-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.warning-content h5 {
    color: #856404;
    margin-bottom: 5px;
}

.warning-content p {
    color: #856404;
    margin: 0;
}

/* Info Sources */
.info-sources {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-source {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.info-source h4 {
    color: #2d3748;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-source p {
    color: #4a5568;
    margin: 0;
}

/* Check Section */
.check-section {
    border: 3px solid #48bb78;
}

.checkpoints {
    margin-bottom: 25px;
}

.checkpoint {
    margin-bottom: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.checkpoint input[type="checkbox"] {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.checkpoint label {
    color: #2d3748;
    font-weight: 500;
    cursor: pointer;
    flex-grow: 1;
}

.mark-complete {
    text-align: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.completion-status {
    display: block;
    margin-top: 10px;
    color: #6c757d;
}

.completion-status.completed {
    color: #48bb78;
    font-weight: bold;
}

/* Sidebar Cards */
.support-card, .test-card, .navigation-card, .download-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 25px;
    overflow: hidden;
}

.support-card {
    border-top: 4px solid #667eea;
    margin-top: 40px;
}

.support-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.support-header h3 {
    margin: 0;
    font-size: 1.3rem;
}

.heart-icon {
    color: #e53e3e;
    font-size: 1.8rem;
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.support-body {
    padding: 25px;
}

.support-body p {
    color: #4a5568;
    line-height: 1.6;
    margin-bottom: 20px;
}

.thank-you {
    text-align: center;
    color: #48bb78;
    margin-bottom: 25px;
    padding: 10px;
    background: #f0fff4;
    border-radius: 8px;
}

/* Donate Section in Sidebar */
.donate-section {
    background: #f7fafc;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.donate-section h4 {
    color: #2d3748;
    margin-bottom: 15px;
    text-align: center;
}

.donate-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.donate-option {
    padding: 12px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.donate-option:hover {
    border-color: #667eea;
    background: #667eea;
    color: white;
}

.custom-amount {
    grid-column: span 2;
}

.donate-button {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
}

.donate-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* Test Card */
.test-card {
    border-top: 4px solid #48bb78;
    padding: 25px;
    text-align: center;
}

.test-card h3 {
    color: #2d3748;
    margin-bottom: 10px;
}

.test-card p {
    color: #4a5568;
    margin-bottom: 20px;
}

.quiz-stats {
    display: flex;
    justify-content: space-around;
    margin: 20px 0;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: bold;
    color: #667eea;
}

.stat-label {
    font-size: 0.9rem;
    color: #718096;
}

.start-quiz-btn {
    display: inline-block;
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    width: 100%;
    border: none;
    cursor: pointer;
}

.start-quiz-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(72, 187, 120, 0.4);
    color: white;
}

/* Navigation Card */
.navigation-card {
    padding: 25px;
}

.navigation-card h4 {
    color: #2d3748;
    margin-bottom: 20px;
    text-align: center;
}

.chapter-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chapter-link {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    background: #f8f9fa;
    border-radius: 8px;
    text-decoration: none;
    color: #4a5568;
    transition: all 0.3s ease;
}

.chapter-link:hover {
    background: #667eea;
    color: white;
    transform: translateX(5px);
}

.chapter-link.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.chapter-number {
    width: 30px;
    height: 30px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-weight: bold;
}

.chapter-title {
    flex-grow: 1;
}

/* Download Card */
.download-card {
    padding: 25px;
}

.download-card h4 {
    color: #2d3748;
    margin-bottom: 20px;
    text-align: center;
}

.download-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.download-link {
    padding: 12px 15px;
    background: #f8f9fa;
    border-radius: 8px;
    text-decoration: none;
    color: #4a5568;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.download-link:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 992px) {
    .requirements-grid {
        grid-template-columns: 1fr;
    }
    
    .and-connector {
        flex-direction: column;
    }
    
    .connector {
        transform: rotate(90deg);
        padding: 15px 8px;
    }
    .content-card {
        width: 80%;
        padding: 15px;
        
    }
}

@media (max-width: 768px) {
    .chapter-container {
        padding: 10px;
        margin: 0px;
        
        
    }
    
    .chapter-header {
        padding: 15px;
    }
    
    .chapter-header h1 {
        font-size: 1.5rem;
    }
    
    .card-body {
        padding: 20px;
    }
    
    .requirements-grid {
        grid-template-columns: 1fr;
    }
    
    .donate-options {
        grid-template-columns: 1fr;
    }
    
    .custom-amount {
        grid-column: span 1;
    }
    .content-card {
        width: 100%;
        padding: 15px;
        margin: 0px;
       
    }

}

img {
    max-width: 80%;
    height: 10%;
    display: block;
    margin: 20px 0;
    border: 1px solid #ddd;
}

img + span {
    display: block;
    text-align: center;
    font-style: italic;
    color: #505a5f;
    font-size: 18px;
    margin-top: 5px;
    margin-bottom: 20px;
}
b, strong {
    color: #0b0c0c;
}

.section1, .section2, .section3, .section4,
.section5, .section6, .early_britain,
.early_britain2, .early_britain3, .the_romans,
.the_romans2, .the_romans3, .the_anglo,
.the_anglo2, .the_vikings, .the_vikings2,
.the_vikings3, .the_norman, .the_norman2,
.the_norman3, .war_at_home, .war_at_home2,
.war_at_home3, .war_at_home4, .war_at_home5,
.black_death, .black_death2, .black_death3,
.legal_political, .legal_political2,
.legal_political3, .legal_political4,
.legal_political5, .identity, .identity2,
.identity3, .identity4, .identity5,
.war_of_rose, .relegious, .relegious2,
.six_wives, .six_wives2, .six_wives3,
.six_wives4, .six_wives5, .six_wives6,
.six_wives7, .six_wives8, .six_wives9,
.six_wives10, .six_wives11, .queen_elizabeth,
.reformation, .reformation2, .exploration,
.exploration2, .williams, .williams2,
.williams3, .ireland, .ireland2 {
    text-indent: 0;
    margin-left: 0;
}



#check_that {
    border: 2px solid #1d70b8; /* 蓝色边框 */
    background-color: #f8f8f8;
    border-radius: 0;
    padding: 20px;
    margin: 20px 0;
}

#check_that h2 {
    color: #0b0c0c;
    font-size: 24px;
    margin-top: 0;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #1d70b8;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
}

#check_that ul {
    margin: 15px 0;
    padding-left: 20px;
}

#check_that li {
    margin-bottom: 8px;
    color: #0b0c0c;
}

#check_that h5 {
    color: #505a5f;
    font-size: 16px;
    margin-top: 20px;
    margin-bottom: 0;
    font-weight: bold;
}

/* Roald Dahl  */
#roald {
    border-left: 4px solid #912b88; 
    background-color: #f3f2f1;
    padding: 20px;
    margin: 20px 0;
}

#roald h2 {
    color: #0b0c0c;
    font-size: 24px;
    margin-top: 0;
    margin-bottom: 15px;
}

#roald p.roald {
    color: #0b0c0c;
    margin: 0;
    font-size: 20px;
}


@media (max-width: 768px) {
    #check_that, #roald {
        padding: 15px;
        margin: 15px 0;
    }
    
    #check_that h2, #roald h2 {
        font-size: 20px;
    }
    .page-wrapper{
        flex-direction: column;
    }
    img {
        max-width: 80% !important;
    }
}