:root {
    /* Primary Colors - Blue theme for Credit Card Validator */
    --cc-primary: #1976d2;
    --cc-primary-dark: #1565c0;
    --cc-primary-light: #e3f2fd;
    --cc-primary-hover: #1565c0;
    --cc-primary-shadow: rgb(25 118 210 / 25%);
    
    /* Semantic Colors */
    --cc-success: #4caf50;
    --cc-warning: #ff9800;
    --cc-danger: #f44336;
    --cc-info: #2196f3;
    --cc-accent: #42a5f5;
    
    /* Surface Colors */
    --cc-surface: #ffffff;
    --cc-surface-muted: #f8f9fa;
    --cc-surface-elevated: #ffffff;
    --cc-background: #f8f9fa;
    --cc-secondary-bg: #e0e0e0;
    
    /* Border Colors */
    --cc-border: #e0e0e0;
    --cc-border-light: #f5f5f5;
    --cc-border-dark: #bdbdbd;
    
    /* Text Colors */
    --cc-text-main: #1a1a1a;
    --cc-text-muted: #666;
    --cc-text-light: #999;
    --cc-text-inverse: #ffffff;
    
    /* Shadow System */
    --cc-shadow-soft: 0 20px 45px rgba(26, 26, 26, 0.08);
    --cc-shadow-sm: 0 1px 2px rgb(26 26 26 / 0.08);
    --cc-shadow-md: 0 4px 12px rgb(26 26 26 / 0.08);
    --cc-shadow-lg: 0 12px 24px rgb(26 26 26 / 0.12);
    --cc-shadow-xl: 0 20px 25px rgb(26 26 26 / 0.1);
    
    /* Border Radius */
    --cc-radius-sm: 0.375rem;
    --cc-radius-md: 0.75rem;
    --cc-radius-lg: 1.5rem;
    --cc-radius-xl: 2rem;
    --cc-radius-full: 9999px;
    
    /* Spacing */
    --cc-spacing-xs: 0.25rem;
    --cc-spacing-sm: 0.5rem;
    --cc-spacing-md: 1rem;
    --cc-spacing-lg: 1.5rem;
    --cc-spacing-xl: 2rem;
    
    /* Legacy Variables */
    --primary-color: var(--cc-primary);
    --primary-color-light: var(--cc-primary-light);
    --surface-color: var(--cc-surface);
    --light-bg: var(--cc-background);
    --border-color: var(--cc-border);
    --text-primary: var(--cc-text-main);
    --text-secondary: var(--cc-text-muted);
    --secondary-color: var(--cc-text-muted);
    --success-color: var(--cc-success);
    --info-color: var(--cc-info);
    --warning-color: var(--cc-warning);
    --danger-color: var(--cc-danger);
    --dark-text: var(--cc-text-main);
    --border-radius: var(--cc-radius-lg);
    --shadow: var(--cc-shadow-md);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);

    
    /* related to and faqs component variables */
    --primary: var(--cc-primary);
    --primary-dark: var(--cc-primary-dark);
    --border: var(--cc-border);
    --surface: var(--cc-surface);
    --shadow-soft: var(--cc-shadow-soft);
    --surface-muted: var(--cc-surface-muted);
    --text-main: var(--cc-text-main);
    --text-muted: var(--cc-text-muted);
}

/* Credit Card Validator Styles */
.cc-validator-wrapper {
    padding: 1rem 0 2rem;
}

.cc-validator-intro {
    margin-bottom: 2rem;
    text-align: left;
}

.cc-validator-heading {
    font-size: clamp(2rem, 5vw, 2.5rem);
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.cc-validator-subheading {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--cc-text-muted);
    max-width: 960px;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.cc-validator-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    list-style: none;
    padding: 0;
    margin: 0;
    justify-content: flex-start;
}

.cc-badge-item {
    background: var(--cc-primary-light);
    color: var(--cc-primary-dark);
    padding: 0.5rem 1rem;
    border-radius: var(--cc-radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--cc-border);
}

.cc-validator-main {
    margin-bottom: 2rem;
}

.cc-validator-card {
    background: var(--cc-surface);
    border-radius: var(--cc-radius-lg);
    box-shadow: var(--cc-shadow-lg);
    padding: 2rem;
    overflow: hidden;
}

.cc-info-banner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--cc-primary-light);
    color: var(--cc-primary-dark);
    padding: 0.875rem 1rem;
    border-radius: var(--cc-radius-md);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.cc-info-banner svg {
    flex-shrink: 0;
}

.cc-input-group {
    margin-bottom: 1.5rem;
}

.cc-input-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--cc-text-main);
    font-size: 0.9375rem;
}

.cc-label-text {
    flex: 1;
}

.cc-help-tooltip {
    position: relative;
    display: inline-flex;
    margin-left: 0.5rem;
}

.cc-help-trigger {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--cc-secondary-bg);
    color: var(--cc-text-muted);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    transition: var(--transition);
}

.cc-help-trigger:hover {
    background: var(--cc-primary);
    color: var(--cc-text-inverse);
}

.cc-help-text {
    position: absolute;
    bottom: 100%;
    right: 0;
    margin-bottom: 0.5rem;
    background: #333;
    color: #fff;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8125rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transform: translateY(5px);
    transition: var(--transition);
    z-index: 10;
    max-width: 250px;
    white-space: normal;
    width: max-content;
}

.cc-help-trigger:hover + .cc-help-text,
.cc-help-trigger:focus + .cc-help-text {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.cc-input-wrapper {
    position: relative;
}

.cc-card-input {
    width: 100%;
    padding: 1rem 3rem 1rem 1rem;
    font-size: 1.125rem;
    border: 2px solid var(--cc-border);
    border-radius: var(--cc-radius-md);
    transition: var(--transition);
    letter-spacing: 0.1em;
    
    background: var(--cc-surface);
    color: var(--cc-text-main);
}

.cc-card-input:focus {
    outline: none;
    border-color: var(--cc-primary);
    box-shadow: 0 0 0 3px var(--cc-primary-shadow);
}

.cc-card-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 24px;
    background: var(--cc-secondary-bg);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--cc-text-muted);
}

.cc-card-icon.visa {
    background: #1a1f71;
    color: #fff;
}

.cc-card-icon.mastercard {
    background: #eb001b;
    color: #fff;
}

.cc-card-icon.amex {
    background: #006fcf;
    color: #fff;
}

.cc-card-icon.discover {
    background: #ff6000;
    color: #fff;
}

.cc-form-actions {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.cc-validate-button,
.cc-secondary-button {
    flex: 1;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--cc-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.cc-validate-button {
    background: var(--cc-primary);
    color: var(--cc-text-inverse);
}

.cc-validate-button:hover {
    background: var(--cc-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--cc-primary-shadow);
}

.cc-secondary-button {
    background: var(--cc-surface-muted);
    color: var(--cc-text-muted);
}

.cc-secondary-button:hover {
    background: var(--cc-secondary-bg);
}

.cc-test-cards-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--cc-border);
}

.cc-test-cards-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--cc-text-muted);
    margin-bottom: 1rem;
}

.cc-test-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(196px, 1fr));
    gap: 1.5rem;
}

.cc-test-card-item {
    background: var(--cc-surface-muted);
    border: 1px solid var(--cc-border);
    border-radius: var(--cc-radius-md);
    padding: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.cc-test-card-item:hover {
    background: var(--cc-primary-light);
    border-color: var(--cc-primary);
    transform: translateY(-2px);
    box-shadow: var(--cc-shadow-md);
}

.cc-test-card-brand {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--cc-primary);
    text-transform: uppercase;
}

.cc-test-card-number {
    font-size: 0.85rem;
    color: var(--cc-text-muted);
    
}

.cc-results-panel {
    background: var(--cc-surface);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.cc-results-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--cc-border);
}

.cc-results-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 0.75rem;
}

.cc-results-metrics {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.cc-metric-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.cc-metric-label {
    font-size: 0.75rem;
    color: var(--cc-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.cc-metric-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cc-text-main);
}

.cc-result-body {
    flex: 1;
    overflow-y: auto;
}

.cc-validation-display {
    min-height: 200px;
}

.cc-validation-success {
    background: #e8f5e9;
    border: 2px solid var(--cc-success);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    color: #2e7d32;
}

.cc-validation-error {
    background: #ffebee;
    border: 2px solid var(--cc-danger);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    color: #c62828;
}

.cc-validation-info {
    background: #fff3e0;
    border: 2px solid var(--cc-warning);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    color: #e65100;
}

.cc-result-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cc-card-details-box {
    background: rgba(255, 255, 255, 0.7);
    border-radius: 6px;
    padding: 1rem;
    margin-top: 1rem;
}

.cc-detail-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.cc-detail-row:last-child {
    border-bottom: none;
}

.cc-detail-label {
    font-weight: 600;
    color: var(--cc-text-muted);
}

.cc-detail-value {
    color: var(--cc-text-main);
    
}

.cc-error-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
}

.cc-error-item {
    padding: 0.5rem 0;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.cc-error-item::before {
    content: "•";
    color: var(--cc-danger);
    font-weight: 700;
    font-size: 1.25rem;
}

.cc-result-footer {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--cc-border);
}

.cc-action-row {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.cc-action-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--cc-surface-muted);
    border: 1px solid var(--cc-border);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--cc-text-muted);
    transition: var(--transition);
}

.cc-action-btn:hover {
    background: var(--cc-secondary-bg);
    border-color: var(--cc-border-dark);
}

.cc-copy-btn.copied {
    background: #e8f5e9;
    border-color: var(--cc-success);
    color: #2e7d32;
}

.cc-share-panel {
    margin-top: 1rem;
}

.cc-share-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--cc-text-muted);
    margin-bottom: 0.75rem;
}

.cc-share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.cc-share-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: var(--transition);
    color: #fff;
}

.cc-share-x {
    background: #000;
}

.cc-share-x:hover {
    background: #333;
}

.cc-share-facebook {
    background: #1877f2;
}

.cc-share-facebook:hover {
    background: #1565c0;
}

.cc-share-linkedin {
    background: #0a66c2;
}

.cc-share-linkedin:hover {
    background: #084d94;
}

.cc-share-reddit {
    background: #ff4500;
}

.cc-share-reddit:hover {
    background: #e63900;
}

.cc-share-telegram {
    background: #0088cc;
}

.cc-share-telegram:hover {
    background: #006ba3;
}

.cc-share-whatsapp {
    background: #25d366;
}

.cc-share-whatsapp:hover {
    background: #1da851;
}

.cc-empty-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    text-align: center;
    color: var(--cc-text-light);
}

.cc-empty-icon {
    margin-bottom: 1rem;
    opacity: 0.5;
}

.cc-empty-content p {
    max-width: 400px;
    line-height: 1.6;
}

/* Content Section Styles - Educational Content */
.cc-educational-content {
    padding: 2rem 0;
}

.cc-knowledge-article {
    background: var(--cc-surface);
    border: 1px solid var(--cc-border);
    border-radius: 18px;
    padding: 32px;
    box-shadow: var(--cc-shadow-soft);
}

.cc-edu-header {
    margin-bottom: 3rem;
    text-align: left;
}

.cc-edu-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.cc-edu-header p {
    font-size: 1.125rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
}

/* Section Spacing */
.cc-luhn-explanation-box,
.cc-issuer-patterns-grid,
.cc-practical-examples-section,
.cc-validation-process-diagram,
.cc-audience-explanation,
.cc-understanding-limitations,
.cc-common-mistakes-guide,
.cc-technical-explanation,
.cc-boundaries-explained,
.cc-team-info {
    margin-bottom: 3rem;
}

.cc-luhn-explanation-box h3,
.cc-issuer-patterns-grid h3,
.cc-practical-examples-section h3,
.cc-validation-process-diagram h3,
.cc-audience-explanation h3,
.cc-understanding-limitations h3,
.cc-common-mistakes-guide h3,
.cc-technical-explanation h3,
.cc-boundaries-explained h3,
.cc-team-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

/* Luhn Algorithm Explanation */
.cc-luhn-explanation-box {
    background: var(--cc-surface-muted);
    border-radius: var(--cc-radius-lg);
    padding: 2rem;
}

.cc-luhn-explanation-box p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.cc-luhn-visual-demo {
    margin-top: 2rem;
}

.cc-luhn-example-card {
    background: var(--cc-surface);
    border-radius: var(--cc-radius-md);
    padding: 2rem;
    border: 2px solid var(--cc-border);
}

.cc-luhn-number-display {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    
    font-size: 1.5rem;
    font-weight: 600;
}

.cc-luhn-digit {
    display: inline-block;
    padding: 0.5rem 0.75rem;
    background: var(--cc-background);
    border-radius: 6px;
    color: var(--cc-text-main);
    min-width: 2.5rem;
    text-align: center;
}

.cc-luhn-digit.cc-luhn-check {
    background: var(--cc-primary);
    color: var(--cc-text-inverse);
    font-weight: 700;
}

.cc-luhn-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.cc-luhn-step-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--cc-background);
    border-radius: var(--cc-radius-md);
}

.cc-step-num {
    width: 32px;
    height: 32px;
    background: var(--cc-primary);
    color: var(--cc-text-inverse);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.cc-step-desc {
    color: var(--cc-text-muted);
    line-height: 1.5;
    font-size: 0.9375rem;
}

/* Issuer Patterns Grid */
.cc-issuer-patterns-grid p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 0;
}

.cc-issuer-cards-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.cc-issuer-item {
    background: var(--cc-surface);
    border: 1px solid var(--cc-border);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    display: flex;
    gap: 1rem;
    transition: var(--transition);
}

.cc-issuer-item:hover {
    border-color: var(--cc-primary);
    box-shadow: var(--cc-shadow-md);
    transform: translateY(-2px);
}

.cc-issuer-badge {
    width: 56px;
    height: 56px;
    border-radius: var(--cc-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--cc-text-inverse);
}

.cc-visa-badge {
    background: #1a1f71;
}

.cc-mastercard-badge {
    background: linear-gradient(135deg, #eb001b 0%, #f79e1b 100%);
}

.cc-amex-badge {
    background: #006fcf;
}

.cc-discover-badge {
    background: #ff6000;
}

.cc-diners-badge {
    background: #0079be;
}

.cc-jcb-badge {
    background: #0c4da2;
}

.cc-issuer-info {
    flex: 1;
}

.cc-issuer-info h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 0.75rem;
}

.cc-prefix-info {
    font-size: 0.9375rem;
    color: var(--cc-text-main);
    font-weight: 600;
    margin-bottom: 0.25rem;
    
}

.cc-length-info {
    font-size: 0.9375rem;
    color: var(--cc-text-main);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.cc-issuer-note {
    font-size: 0.875rem;
    color: var(--cc-text-muted);
    line-height: 1.6;
}

/* Practical Examples Section */
.cc-practical-examples-section p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.cc-example-block {
    background: var(--cc-surface);
    border: 1px solid var(--cc-border);
    border-radius: var(--cc-radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
}

.cc-example-header {
    margin-bottom: 1.5rem;
}

.cc-example-tag {
    display: inline-block;
    background: var(--cc-primary);
    color: var(--cc-text-inverse);
    padding: 0.375rem 0.875rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.cc-example-block h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 1rem;
}

.cc-example-block p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.cc-example-detail {
    background: var(--cc-background);
    border-radius: var(--cc-radius-md);
    padding: 1rem;
    margin-top: 1rem;
}

.cc-detail-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--cc-text-muted);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.cc-detail-content {
    font-size: 0.9375rem;
    color: var(--cc-text-main);
    line-height: 1.6;
    
}

/* Validation Process Diagram */
.cc-validation-process-diagram {
    background: var(--cc-surface-muted);
    border-radius: var(--cc-radius-lg);
    padding: 2rem;
}

.cc-validation-process-diagram p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.cc-process-stages {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.cc-stage-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    background: var(--cc-surface);
    padding: 1.5rem;
    border-radius: var(--cc-radius-md);
    border-left: 4px solid var(--cc-primary);
}

.cc-stage-number {
    width: 40px;
    height: 40px;
    background: var(--cc-primary);
    color: var(--cc-text-inverse);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.cc-stage-content {
    flex: 1;
}

.cc-stage-content h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 0.5rem;
}

.cc-stage-content p {
    font-size: 0.9375rem;
    color: var(--cc-text-muted);
    line-height: 1.6;
    margin: 0;
}

.cc-process-note {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--cc-surface);
    border-left: 4px solid var(--cc-warning);
    border-radius: 4px;
}

.cc-process-note p {
    font-size: 0.9375rem;
    color: var(--cc-text-muted);
    line-height: 1.6;
    margin: 0;
}

/* Audience Explanation */
.cc-audience-explanation p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.cc-audience-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.cc-audience-entry {
    background: var(--cc-surface);
    border: 1px solid var(--cc-border);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
}

.cc-audience-entry h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 0.75rem;
}

.cc-audience-entry p {
    font-size: 0.9375rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin: 0;
}

/* Understanding Limitations */
.cc-understanding-limitations p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.cc-limits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.cc-limit-item {
    background: var(--cc-surface);
    border: 1px solid var(--cc-border);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
}

.cc-limit-what {
    border-left: 4px solid var(--cc-success);
}

.cc-limit-whatnot {
    border-left: 4px solid var(--cc-warning);
}

.cc-limit-item h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 1rem;
}

.cc-limit-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.cc-limit-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.9375rem;
    color: var(--cc-text-muted);
    line-height: 1.6;
}

.cc-limit-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--cc-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.cc-why-this-matters {
    background: var(--cc-surface-muted);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.cc-why-this-matters h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 1rem;
}

.cc-why-this-matters p {
    font-size: 0.9375rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.cc-why-this-matters p:last-child {
    margin-bottom: 0;
}

/* Common Mistakes Guide */
.cc-common-mistakes-guide p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.cc-mistake-examples {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.cc-mistake-item {
    background: var(--cc-surface);
    border: 1px solid var(--cc-border);
    border-left: 4px solid var(--cc-danger);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
}

.cc-mistake-item h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 0.75rem;
}

.cc-mistake-item p {
    font-size: 0.9375rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin: 0;
}

.cc-validation-tips {
    background: var(--cc-surface-muted);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.cc-validation-tips h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 1rem;
}

.cc-validation-tips p {
    font-size: 0.9375rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.cc-validation-tips p:last-child {
    margin-bottom: 0;
}

.cc-validation-tips a {
    color: var(--cc-primary);
    text-decoration: none;
    font-weight: 500;
}

.cc-validation-tips a:hover {
    text-decoration: underline;
}

/* Technical Explanation */
.cc-technical-explanation p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.cc-tech-steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.cc-tech-step {
    background: var(--cc-surface);
    border: 1px solid var(--cc-border);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
}

.cc-tech-step h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 0.75rem;
}

.cc-tech-step p {
    font-size: 0.9375rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin: 0;
}

/* Boundaries Explained */
.cc-boundaries-explained p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.cc-boundary-item {
    background: var(--cc-surface);
    border: 1px solid var(--cc-border);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.cc-boundary-item:last-child {
    margin-bottom: 0;
}

.cc-boundary-item h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 0.75rem;
}

.cc-boundary-item p {
    font-size: 0.9375rem;
    color: var(--cc-text-muted);
    line-height: 1.7;
    margin: 0;
}

/* Team Info */
.cc-team-info {
    background: var(--cc-surface-muted);
    border-radius: var(--cc-radius-lg);
    padding: 2rem;
}

.cc-team-info h3 {
    margin-bottom: 1.5rem;
}

.cc-team-info p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.cc-team-info p:last-child {
    margin-bottom: 0;
}

.cc-team-info a {
    color: var(--cc-primary);
    text-decoration: none;
    font-weight: 500;
}

.cc-team-info a:hover {
    text-decoration: underline;
}

.flow-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 2rem;
    background: var(--cc-background);
    border-radius: var(--cc-radius-lg);
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 150px;
}

.flow-icon {
    width: 64px;
    height: 64px;
    background: var(--cc-primary);
    color: var(--cc-text-inverse);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flow-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cc-text-main);
    margin-bottom: 0.25rem;
}

.flow-content p {
    font-size: 0.875rem;
    color: var(--cc-text-muted);
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--cc-text-light);
    font-weight: 700;
}

.error-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.error-type-card {
    background: var(--cc-surface-muted);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition);
}

.error-type-card:hover {
    background: var(--cc-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--cc-shadow-md);
}

.error-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    border-radius: var(--cc-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.error-syntax {
    background: var(--cc-danger);
    color: var(--cc-text-inverse);
}

.error-structure {
    background: var(--cc-warning);
    color: var(--cc-text-inverse);
}

.error-attribute {
    background: var(--cc-info);
    color: var(--cc-text-inverse);
}

.error-encoding {
    background: var(--cc-primary);
    color: var(--cc-text-inverse);
}

.error-type-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cc-text-main);
    margin-bottom: 0.5rem;
}

.error-type-card p {
    font-size: 0.875rem;
    color: var(--cc-text-muted);
}

.cc-scenario-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.scenario-card {
    background: var(--cc-surface-muted);
    border-radius: var(--cc-radius-lg);
    padding: 2rem;
}

.scenario-badge {
    display: inline-block;
    background: var(--cc-primary);
    color: var(--cc-text-inverse);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.scenario-card h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cc-text-main);
    margin-bottom: 1rem;
}

.scenario-card p {
    color: var(--cc-text-muted);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.scenario-example {
    background: var(--cc-surface);
    border-radius: var(--cc-radius-md);
    padding: 1rem;
    margin-bottom: 1rem;
}

.example-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--cc-text-muted);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.scenario-snippet {
    background: #1a1a1a;
    color: #fff;
    padding: 1rem;
    border-radius: 6px;
    
    font-size: 0.875rem;
    overflow-x: auto;
    margin: 0;
}

.scenario-outcome {
    background: #e8f5e9;
    border-left: 4px solid var(--cc-success);
    padding: 1rem;
    border-radius: 4px;
    color: #2e7d32;
}

.cc-quick-guide-box {
    background: var(--cc-primary-light);
    border-radius: var(--cc-radius-lg);
    padding: 2rem;
}

.quick-guide-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.quick-guide-header h3 {
    margin: 0;
}

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

.quick-step {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.step-number {
    width: 32px;
    height: 32px;
    background: var(--cc-primary);
    color: var(--cc-text-inverse);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.step-text {
    color: var(--cc-text-main);
    line-height: 1.5;
}

.quick-tip {
    background: var(--cc-surface);
    border-left: 4px solid var(--cc-primary);
    padding: 1rem;
    border-radius: 4px;
    color: var(--cc-text-muted);
}

.usecase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.usecase-item {
    background: var(--cc-surface-muted);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    text-align: center;
}

.usecase-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.usecase-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cc-text-main);
    margin-bottom: 0.5rem;
}

.usecase-item p {
    font-size: 0.875rem;
    color: var(--cc-text-muted);
    line-height: 1.5;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--cc-surface-muted);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
}

.feature-positive {
    border-left: 4px solid var(--cc-success);
}

.feature-neutral {
    border-left: 4px solid var(--cc-warning);
}

.feature-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.feature-header h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cc-text-main);
}

.feature-card p {
    font-size: 0.875rem;
    color: var(--cc-text-muted);
    line-height: 1.5;
}

.practices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.practice-item {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: var(--cc-radius-md);
}

.practice-good {
    background: #e8f5e9;
    border-left: 4px solid var(--cc-success);
}

.practice-bad {
    background: #ffebee;
    border-left: 4px solid var(--cc-danger);
}

.practice-icon {
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.practice-good .practice-icon {
    color: #2e7d32;
}

.practice-bad .practice-icon {
    color: #c62828;
}

.practice-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cc-text-main);
    margin-bottom: 0.5rem;
}

.practice-content p {
    font-size: 0.875rem;
    color: var(--cc-text-muted);
    line-height: 1.5;
}

.related-tools-callout {
    background: var(--cc-surface);
    border-radius: var(--cc-radius-md);
    padding: 1.5rem;
    border: 1px solid var(--cc-border);
}

.related-tools-callout h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cc-text-main);
    margin-bottom: 0.75rem;
}

.related-tools-callout p {
    font-size: 0.875rem;
    color: var(--cc-text-muted);
    line-height: 1.6;
}

.related-tools-callout a {
    color: var(--cc-primary);
    text-decoration: none;
    font-weight: 500;
}

.related-tools-callout a:hover {
    text-decoration: underline;
}

.cc-how-tool-works p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.8;
}

.cc-accuracy ul {
    list-style: none;
    padding: 0;
}

.cc-accuracy li {
    padding: 0.75rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--cc-text-muted);
    line-height: 1.6;
}

.cc-accuracy li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--cc-primary);
    font-weight: 700;
}

.cc-team-card {
    background: var(--cc-surface-muted);
    border-radius: var(--cc-radius-lg);
    padding: 2rem;
}

.cc-team-card p {
    font-size: 1rem;
    color: var(--cc-text-muted);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.cc-team-card a {
    color: var(--cc-primary);
    text-decoration: none;
    font-weight: 500;
}

.cc-team-card a:hover {
    text-decoration: underline;
}

.trust-note {
    background: var(--cc-surface);
    border-left: 4px solid var(--cc-primary);
    padding: 1rem;
    border-radius: 4px;
    font-size: 0.875rem;
    color: var(--cc-text-muted);
    margin-top: 1rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .cc-validator-heading {
        font-size: 1.5rem;
    }

    .cc-validator-subheading {
        font-size: 1rem;
    }

    .cc-validator-card {
        padding: 1rem;
    }

    .cc-results-panel {
        padding: 1rem;
    }

    .cc-form-actions {
        flex-direction: column;
    }

    .cc-test-cards-grid {
        grid-template-columns: 1fr;
    }

    .flow-diagram {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .error-types-grid,
    .usecase-grid,
    .features-grid,
    .practices-grid,
    .cc-issuer-cards-layout,
    .cc-limits-grid {
        grid-template-columns: 1fr;
    }

    .cc-luhn-number-display {
        font-size: 1.25rem;
    }

    .cc-luhn-digit {
        min-width: 2rem;
        padding: 0.375rem 0.5rem;
    }

    .cc-stage-item {
        flex-direction: column;
        gap: 1rem;
    }

    .cc-issuer-item {
        flex-direction: column;
        text-align: center;
    }

    .cc-issuer-badge {
        margin: 0 auto;
    }

    .cc-share-buttons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .cc-validator-intro {
        margin: 1rem 0 2rem;
    }

    .cc-validator-heading {
        font-size: 1.25rem;
    }

    .cc-card-input {
        font-size: 1rem;
        padding: 0.875rem 2.5rem 0.875rem 0.875rem;
    }

    .cc-card-icon {
        width: 28px;
        height: 20px;
        right: 0.75rem;
    }
}