/* Chapter intro styles */
.chapter-intro {
    margin-bottom: 2rem;
}

.lead-text {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.subtitle {
    font-size: 1.25rem;
    color: #666;
    font-weight: 300;
    margin-bottom: 1rem;
}

/* Strategy cards */
.strategy-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.strategy-card {
    background-color: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.strategy-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.strategy-card.danger-strategy:hover {
    border: 2px solid var(--error-color);
}

.strategy-card.success-strategy:hover {
    border: 2px solid var(--success-color);
}

.strategy-icon {
    width: 80px;
    height: 80px;
    background-color: #f5f5f5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.strategy-icon .material-icons {
    font-size: 3rem;
    color: #666;
}

.danger-strategy .strategy-icon {
    background-color: #ffebee;
}

.danger-strategy .strategy-icon .material-icons {
    color: var(--error-color);
}

.success-strategy .strategy-icon {
    background-color: #e8f5e9;
}

.success-strategy .strategy-icon .material-icons {
    color: var(--success-color);
}

.strategy-card h3 {
    margin-bottom: 1rem;
    color: #333;
}

.strategy-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.strategy-button {
    width: 100%;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.strategy-button.danger {
    background-color: var(--error-color);
    color: white;
}

.strategy-button.danger:hover {
    background-color: #b71c1c;
}

.strategy-button.success {
    background-color: var(--success-color);
    color: white;
}

.strategy-button.success:hover {
    background-color: #388e3c;
}

/* Demo container */
.demo-container {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

/* Deploy buttons */
.deploy-button {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    margin-bottom: 1rem;
}

.deploy-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.deploy-button.danger {
    background-color: var(--error-color);
    color: white;
}

.deploy-button.danger:hover:not(:disabled) {
    background-color: #b71c1c;
}

.deploy-button.primary {
    background-color: var(--primary-color);
    color: white;
}

.deploy-button.primary:hover:not(:disabled) {
    background-color: var(--primary-variant-color);
}

.rollback-button {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--error-color);
    background-color: white;
    color: var(--error-color);
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.rollback-button:hover {
    background-color: var(--error-color);
    color: white;
}

.hotfix-button {
    width: 100%;
    padding: 0.75rem;
    border: none;
    background-color: var(--warning-color);
    color: white;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.hotfix-button:hover:not(:disabled) {
    background-color: #e65100;
}

/* Action button */
.action-button {
    padding: 0.75rem 1.5rem;
    border: none;
    background-color: var(--primary-color);
    color: white;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.action-button:hover {
    background-color: var(--primary-variant-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Nudge hint styling */
.nudge-hint {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background-color: #E3F2FD;
    border: 1px solid #1976D2;
    border-radius: 8px;
    color: #1565C0;
    font-weight: 500;
    animation: gentle-pulse 2s ease-in-out infinite;
}

.nudge-hint .pulse-icon {
    color: #1976D2;
    animation: icon-pulse 1.5s ease-in-out infinite;
}

@keyframes gentle-pulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 2px 4px rgba(25, 118, 210, 0.2);
    }
    50% { 
        transform: scale(1.02);
        box-shadow: 0 4px 8px rgba(25, 118, 210, 0.3);
    }
}

@keyframes icon-pulse {
    0%, 100% { 
        opacity: 0.7;
    }
    50% { 
        opacity: 1;
    }
}

/* Technical content */
.technical-content {
    margin-top: 2rem;
}

.code-section {
    margin-bottom: 3rem;
}

.code-section h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.code-block {
    background-color: #263238;
    color: #aed581;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    line-height: 1.5;
}

.code-block .keyword {
    color: #ce93d8;
}

.code-block .string {
    color: #ffcc80;
}

.code-block .comment {
    color: #546e7a;
    font-style: italic;
}

/* Architecture section */
.architecture-section {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.architecture-section h3 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.architecture-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin: 2rem 0;
    padding: 2rem;
    background-color: #f5f5f5;
    border-radius: 8px;
}

.arch-component {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.arch-component .material-icons {
    font-size: 3rem;
    color: var(--primary-color);
}

.arch-component p {
    font-weight: 500;
    color: #666;
}

.arch-arrow {
    font-size: 2rem;
    color: #999;
}

.architecture-description {
    margin-top: 2rem;
    color: #666;
    line-height: 1.6;
}

.segment-examples {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background-color: #e8f5e9;
    border-radius: 8px;
}

.segment-examples h4 {
    margin-bottom: 1rem;
    color: #2e7d32;
}

.segment-examples ul {
    list-style: none;
    padding: 0;
}

.segment-examples li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: #555;
}

.segment-examples .material-icons {
    font-size: 1.25rem;
    color: #4caf50;
}

/* Concept cards */
.concept-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.concept-card {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.concept-icon {
    width: 80px;
    height: 80px;
    background-color: #f5f5f5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.concept-icon .material-icons {
    font-size: 3rem;
}

.deploy-card .concept-icon {
    background-color: #e3f2fd;
}

.deploy-card .concept-icon .material-icons {
    color: #1976d2;
}

.release-card .concept-icon {
    background-color: #fce4ec;
}

.release-card .concept-icon .material-icons {
    color: #c2185b;
}

.concept-card h3 {
    margin-bottom: 0.5rem;
    color: #333;
}

.concept-card p {
    color: #666;
    line-height: 1.5;
}

/* Power section */
.power-section {
    background-color: #f5f5f5;
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
}

.power-section h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Quiz section */
.quiz-section {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin: 2rem 0;
}

.quiz-section h3 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.quiz-question {
    background-color: #f5f5f5;
    padding: 1.5rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
}

.quiz-question p {
    color: #333;
    line-height: 1.6;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.quiz-option {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    background-color: #f5f5f5;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quiz-option:hover {
    background-color: #e0e0e0;
}

.quiz-option input[type="radio"] {
    margin-top: 0.25rem;
}

.quiz-option span {
    flex: 1;
    line-height: 1.5;
}

.quiz-submit {
    padding: 0.75rem 2rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quiz-submit:hover {
    background-color: var(--primary-variant-color);
}

.quiz-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quiz-feedback.success {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.quiz-feedback.error {
    background-color: #ffebee;
    color: #c62828;
}

/* Completion section */
.completion-section {
    margin-top: 2rem;
    text-align: center;
}

.completion-message {
    background-color: #fff8e1;
    padding: 2rem;
    border-radius: 8px;
    display: inline-block;
}

.completion-message .material-icons {
    font-size: 4rem;
    color: #ffc107;
    margin-bottom: 1rem;
}

.completion-message h3 {
    color: #f57c00;
    margin-bottom: 0.5rem;
}

.completion-message p {
    color: #666;
}

/* Navigation buttons */
.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e0e0e0;
}

.navigation-buttons .nav-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: white;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.navigation-buttons .nav-button:hover {
    background-color: var(--primary-color);
    color: white;
}

.navigation-buttons .nav-button.success {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.navigation-buttons .nav-button.success:hover {
    background-color: #388e3c;
}