/* ================================
   AI Fluency Blog - Article Styles
   Beautiful, readable long-form content
   ================================ */

/* Reading Progress Bar */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--bg-secondary);
    z-index: 1001;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--accent-gradient);
    transition: width 0.1s ease-out;
}

/* Article Navigation */
.article-nav {
    background: rgba(10, 10, 11, 0.95);
}

[data-theme="light"] .article-nav {
    background: rgba(250, 250, 250, 0.95);
}

/* ================================
   Article Hero
   ================================ */
.article-hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 140px 40px 80px;
    overflow: hidden;
}

.article-hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    text-align: center;
}

.article-series {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.2s forwards;
}

.series-badge {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--bg-primary);
    background: var(--accent-primary);
    padding: 4px 10px;
    border-radius: 4px;
}

.series-title {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.series-part {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-left: 16px;
    border-left: 1px solid var(--border-medium);
}

.article-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 48px;
}

.article-title .title-line {
    display: block;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) forwards;
}

.article-title .title-line:nth-child(1) { animation-delay: 0.3s; }
.article-title .title-line:nth-child(2) { animation-delay: 0.4s; }
.article-title .title-line:nth-child(3) { animation-delay: 0.5s; }

.title-emphasis {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.article-meta-hero {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.7s forwards;
}

.meta-author {
    display: flex;
    align-items: center;
    gap: 14px;
}

.author-avatar-lg {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--bg-primary);
}

.author-details {
    display: flex;
    flex-direction: column;
    text-align: left;
    gap: 2px;
}

.author-details .author-name {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 600;
}

.author-details .author-title {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.meta-stats {
    display: flex;
    gap: 24px;
}

.meta-stats .stat {
    display: flex;
    align-items: center;
    gap: 8px;
}

.stat-icon {
    color: var(--accent-primary);
    font-size: 0.875rem;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 1s forwards;
}

.scroll-hint span {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-muted);
}

.scroll-arrow {
    font-size: 1.25rem;
    color: var(--accent-primary);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

/* ================================
   Article Container
   ================================ */
.article-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 80px 40px 120px;
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 80px;
}

/* ================================
   Sidebar
   ================================ */
.article-sidebar {
    position: relative;
}

.sidebar-sticky {
    position: sticky;
    top: 120px;
}

.toc {
    margin-bottom: 40px;
}

.toc-title {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.toc-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toc-link {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    padding: 8px 0;
    padding-left: 16px;
    border-left: 2px solid transparent;
    transition: all 0.3s ease;
}

.toc-link:hover {
    color: var(--text-secondary);
}

.toc-link.active {
    color: var(--text-primary);
    border-left-color: var(--accent-primary);
}

.share-widget {
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
}

.share-label {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    display: block;
    margin-bottom: 12px;
}

.share-buttons {
    display: flex;
    gap: 8px;
}

.share-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-medium);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.share-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ================================
   Article Main Content
   ================================ */
.article-main {
    max-width: 720px;
}

/* Opening Quote */
.article-opening {
    margin-bottom: 64px;
}

.opening-quote {
    position: relative;
    padding: 40px;
    background: var(--bg-secondary);
    border-radius: 16px;
    border-left: 4px solid var(--accent-primary);
}

.opening-quote .quote-icon {
    font-family: var(--font-serif);
    font-size: 4rem;
    line-height: 0;
    color: var(--accent-primary);
    opacity: 0.3;
    position: absolute;
    top: 30px;
    left: 20px;
}

.opening-quote p {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-style: italic;
    line-height: 1.5;
    margin-bottom: 16px;
    padding-left: 40px;
}

.opening-quote cite {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-style: normal;
    color: var(--text-muted);
    padding-left: 40px;
}

/* Section Headings */
.article-section {
    margin-bottom: 80px;
    scroll-margin-top: 120px;
}

.section-heading {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-subtle);
}

.heading-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.heading-text {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Content Blocks */
.content-block {
    margin-bottom: 40px;
}

.content-block p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.content-block strong {
    color: var(--text-primary);
    font-weight: 600;
}

.content-block em {
    font-style: italic;
}

.lead-paragraph {
    font-size: 1.3125rem !important;
    line-height: 1.7;
    color: var(--text-primary) !important;
}

/* Section Divider */
.section-divider {
    display: flex;
    justify-content: center;
    padding: 48px 0;
}

.divider-icon {
    color: var(--accent-primary);
    font-size: 1.25rem;
    opacity: 0.5;
}

/* ================================
   Special Content Elements
   ================================ */

/* Highlight Stat */
.highlight-stat {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 32px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08) 0%, rgba(124, 58, 237, 0.05) 100%);
    border-radius: 16px;
    margin: 32px 0;
    border: 1px solid var(--border-subtle);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-description {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    max-width: 300px;
}

/* Callout Boxes */
.callout {
    display: flex;
    gap: 16px;
    padding: 24px;
    border-radius: 12px;
    margin: 32px 0;
    border: 1px solid var(--border-subtle);
}

.callout-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.callout-content h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.callout-content p {
    font-size: 0.9375rem !important;
    margin-bottom: 0 !important;
}

.callout-warning {
    background: rgba(245, 158, 11, 0.08);
    border-color: rgba(245, 158, 11, 0.3);
}

.callout-warning .callout-icon {
    color: var(--accent-tertiary);
}

.callout-critical {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.3);
}

.callout-critical .callout-icon {
    color: #ef4444;
}

.callout-action {
    background: rgba(0, 212, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.3);
}

.callout-action .callout-icon {
    color: var(--accent-primary);
}

/* Data Visualization */
.data-visualization {
    padding: 32px;
    background: var(--bg-secondary);
    border-radius: 16px;
    margin: 40px 0;
    border: 1px solid var(--border-subtle);
}

.viz-header {
    margin-bottom: 24px;
}

.viz-label {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    display: block;
    margin-bottom: 4px;
}

.viz-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
}

.viz-range {
    text-align: center;
}

.range-bar {
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 12px;
}

.range-fill {
    height: 100%;
    width: 70%;
    background: var(--accent-gradient);
    border-radius: 12px;
    animation: fillRange 1.5s var(--ease-out-expo) forwards;
}

@keyframes fillRange {
    from { width: 0%; }
    to { width: 70%; }
}

.range-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.range-min, .range-max {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.range-context {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Pull Quote */
.pull-quote {
    position: relative;
    padding: 32px 0 32px 32px;
    margin: 48px 0;
    border-left: 3px solid var(--accent-primary);
}

.pull-quote p {
    font-family: var(--font-serif);
    font-size: 1.5rem !important;
    font-style: italic;
    line-height: 1.5 !important;
    color: var(--text-primary) !important;
    margin-bottom: 0 !important;
}

.pull-quote-accent {
    border-left-color: var(--accent-tertiary);
}

/* Analogy Box */
.analogy-box {
    background: var(--bg-secondary);
    border-radius: 16px;
    overflow: hidden;
    margin: 32px 0;
}

.analogy-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-subtle);
}

.analogy-icon {
    font-size: 1.25rem;
}

.analogy-label {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-primary);
}

.analogy-content {
    padding: 24px;
}

.analogy-content p {
    margin-bottom: 16px !important;
}

.analogy-punchline {
    font-weight: 500;
    color: var(--text-primary) !important;
    padding: 16px;
    background: rgba(0, 212, 255, 0.05);
    border-radius: 8px;
    margin-bottom: 0 !important;
}

/* Comparison Grid */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 24px;
    margin: 40px 0;
    align-items: start;
}

.comparison-item {
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
}

.comparison-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-subtle);
}

.comparison-icon {
    font-size: 1.5rem;
}

.comparison-label {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 600;
}

.comparison-list {
    list-style: none;
}

.comparison-list li {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
}

.comparison-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--text-muted);
}

.comparison-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 0;
}

.comparison-divider span {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Concept Cards */
.concept-card {
    background: var(--bg-secondary);
    border-radius: 16px;
    overflow: hidden;
    margin: 32px 0;
    border: 1px solid var(--border-subtle);
}

.concept-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-subtle);
    flex-wrap: wrap;
}

.concept-icon {
    font-size: 1.5rem;
}

.concept-header h3 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    flex-grow: 1;
}

.concept-badge {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-tertiary);
    background: rgba(245, 158, 11, 0.15);
    padding: 4px 10px;
    border-radius: 4px;
}

.concept-body {
    padding: 24px;
}

.concept-body p {
    margin-bottom: 16px !important;
}

.concept-body p:last-child {
    margin-bottom: 0 !important;
}

.concept-highlight {
    border-color: var(--accent-primary);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.1);
}

.concept-highlight .concept-header {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, var(--bg-tertiary) 100%);
}

/* Key Insight */
.key-insight {
    padding: 24px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08) 0%, rgba(124, 58, 237, 0.05) 100%);
    border-radius: 12px;
    border-left: 4px solid var(--accent-primary);
    margin: 24px 0;
}

.key-insight p {
    font-size: 1.0625rem !important;
    margin-bottom: 0 !important;
    color: var(--text-primary) !important;
}

/* Spectrum Visual */
.spectrum-visual {
    padding: 32px;
    background: var(--bg-secondary);
    border-radius: 16px;
    margin: 40px 0;
    border: 1px solid var(--border-subtle);
}

.spectrum-header {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 24px;
}

.spectrum-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.spectrum-point {
    flex: 1;
    padding: 20px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-subtle);
}

.point-label {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    display: block;
    margin-bottom: 8px;
}

.point-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 8px;
}

.point-trait {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-primary);
}

.spectrum-arrow {
    font-size: 1.5rem;
    color: var(--text-muted);
}

/* Limitation Cards */
.limitation-card {
    background: var(--bg-secondary);
    border-radius: 16px;
    overflow: hidden;
    margin: 32px 0;
    border: 1px solid var(--border-subtle);
}

.limitation-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-subtle);
}

.limitation-icon {
    font-size: 1.5rem;
}

.limitation-header h3 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
}

.limitation-body {
    padding: 24px;
}

.limitation-critical {
    border-color: rgba(239, 68, 68, 0.3);
}

.limitation-critical .limitation-header {
    background: rgba(239, 68, 68, 0.08);
}

/* Check Lists */
.check-list {
    list-style: none;
    margin: 20px 0;
}

.check-list li {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 28px;
    position: relative;
}

.check-list.negative li::before {
    content: '✕';
    position: absolute;
    left: 0;
    color: #ef4444;
    font-size: 0.75rem;
}

.check-list li:last-child {
    color: var(--text-primary);
    font-weight: 500;
}

/* Example Box */
.example-box {
    padding: 20px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    margin: 20px 0;
    border-left: 3px solid var(--accent-secondary);
}

.example-label {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-secondary);
    display: block;
    margin-bottom: 8px;
}

.example-box p {
    font-size: 0.9375rem !important;
    margin-bottom: 0 !important;
}

.example-warning {
    border-left-color: var(--accent-tertiary);
}

.example-warning .example-label {
    color: var(--accent-tertiary);
}

/* Cannot Grid */
.cannot-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 24px 0;
}

.cannot-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.cannot-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.cannot-item span:last-child {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footnote {
    font-size: 0.875rem !important;
    color: var(--text-muted) !important;
    font-style: italic;
    margin-top: 16px !important;
}

/* Risk Cascade */
.risk-cascade {
    margin: 40px 0;
}

.cascade-step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
}

.cascade-step.step-danger {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.3);
}

.step-number {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-primary);
    color: var(--bg-primary);
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 700;
    border-radius: 50%;
    flex-shrink: 0;
}

.step-danger .step-number {
    background: #ef4444;
}

.step-content h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.step-content p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin: 0;
}

.cascade-arrow {
    text-align: center;
    padding: 8px 0;
    color: var(--text-muted);
    font-size: 1.25rem;
}

/* Learning Methods */
.learning-methods {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin: 40px 0;
}

.method-card {
    padding: 28px;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
    transition: all 0.3s ease;
}

.method-card:hover {
    border-color: var(--accent-primary);
    transform: translateX(8px);
}

.method-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.method-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.method-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.method-analogy {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.analogy-tag {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.method-analogy span:last-child {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent-primary);
}

/* Takeaways */
.takeaways-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.takeaway-card {
    display: flex;
    gap: 24px;
    padding: 28px;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
    transition: all 0.3s ease;
}

.takeaway-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 8px 32px rgba(0, 212, 255, 0.1);
}

.takeaway-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-primary);
    opacity: 0.5;
    line-height: 1;
}

.takeaway-content h4 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

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

/* Next Article CTA */
.next-article {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 40px;
    padding: 48px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08) 0%, rgba(124, 58, 237, 0.05) 100%);
    border-radius: 20px;
    border: 1px solid var(--border-medium);
    margin: 80px 0 60px;
    align-items: center;
}

.next-label {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-primary);
    display: block;
    margin-bottom: 12px;
}

.next-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.next-subtitle {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.next-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.next-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.next-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3);
}

.next-article-visual {
    width: 160px;
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-decoration {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--border-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.visual-decoration::before {
    content: '';
    position: absolute;
    inset: 10px;
    border-radius: 50%;
    border: 1px solid var(--border-subtle);
}

.deco-text {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Article Footer */
.article-footer {
    padding: 40px;
    background: var(--bg-secondary);
    border-radius: 16px;
    text-align: center;
}

.series-info {
    margin-bottom: 32px;
}

.series-info p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

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

.article-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 10px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.action-btn.primary {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.action-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3);
}

.action-btn.secondary {
    background: transparent;
    border: 1px solid var(--border-medium);
    color: var(--text-primary);
}

.action-btn.secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* References */
.article-references {
    padding: 32px;
    background: var(--bg-secondary);
    border-radius: 16px;
    margin: 48px 0 60px;
    border: 1px solid var(--border-subtle);
}

.references-title {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.references-list {
    list-style: none;
}

.references-list li {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    line-height: 1.6;
}

.references-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--text-muted);
}

.references-list li em {
    font-style: italic;
    color: var(--text-secondary);
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 1024px) {
    .article-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .article-sidebar {
        display: none;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .comparison-divider {
        padding: 16px 0;
    }

    .cannot-grid {
        grid-template-columns: 1fr;
    }

    .next-article {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .next-article-visual {
        display: none;
    }
}

@media (max-width: 768px) {
    .article-hero {
        padding: 120px 24px 60px;
    }

    .article-meta-hero {
        flex-direction: column;
        gap: 24px;
    }

    .article-container {
        padding: 60px 24px 80px;
    }

    .section-heading {
        flex-direction: column;
        gap: 8px;
    }

    .heading-text {
        font-size: 1.5rem;
    }

    .highlight-stat {
        flex-direction: column;
        text-align: center;
    }

    .stat-number {
        font-size: 3rem;
    }

    .spectrum-bar {
        flex-direction: column;
    }

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

    .next-article {
        padding: 32px;
    }

    .article-actions {
        flex-direction: column;
    }

    .action-btn {
        justify-content: center;
    }
}