/* ================================
   Modern Blog Article Design System
   Premium Reading Experience with Perfect Mobile Responsiveness
   ================================ */

:root {
    /* Colors - Primary Palette */
    --navy-900: #0A1628;
    --navy-800: #1E293B;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748B;
    
    /* Colors - Cyan/Teal Accent */
    --cyan-600: #0891B2;
    --cyan-500: #06B6D4;
    --cyan-400: #22D3EE;
    --cyan-50: #ECFEFF;
    --cyan-100: #CFFAFE;
    
    /* Colors - Neutral Background */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    
    /* Colors - Accent */
    --green-500: #10B981;
    --amber-500: #F59E0B;
    --blue-500: #3B82F6;
    --yellow-50: #FEF3C7;
    --green-50: #D1FAE5;
    --blue-50: #EFF6FF;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Plus Jakarta Sans', 'Inter', sans-serif;
    --font-mono: 'Fira Code', 'Consolas', 'Monaco', monospace;
    
    /* Fluid Typography - Responsive Font Sizes */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
    --text-sm: clamp(0.8125rem, 0.775rem + 0.25vw, 0.875rem);
    --text-base: clamp(0.9375rem, 0.875rem + 0.3vw, 1rem);
    --text-md: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
    --text-lg: clamp(1.0625rem, 1rem + 0.3vw, 1.125rem);
    --text-xl: clamp(1.125rem, 1.05rem + 0.4vw, 1.25rem);
    --text-2xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --text-3xl: clamp(1.5rem, 1.25rem + 1.25vw, 1.875rem);
    --text-4xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.25rem);
    --text-5xl: clamp(2rem, 1.5rem + 2.5vw, 2.75rem);
    
    /* Spacing Scale - Responsive */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Layout */
    --max-width-article: 780px;
    --max-width-sidebar: 340px;
    --max-width-container: 1280px;
    
    /* Border Radius */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15), 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.6, 1);
}

/* ================================
   Base Styles & Reset
   ================================ */

.article-page {
    font-family: var(--font-primary);
    background: linear-gradient(to bottom, var(--white), var(--gray-50));
    color: var(--navy-800);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

* {
    box-sizing: border-box;
}

::selection {
    background-color: var(--cyan-100);
    color: var(--navy-900);
}

/* Hide scrollbar for cleaner look */
body::-webkit-scrollbar {
    width: 8px;
}

body::-webkit-scrollbar-track {
    background: var(--gray-100);
}

body::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
}

body::-webkit-scrollbar-thumb:hover {
    background: var(--cyan-500);
}

/* ================================
   Reading Progress Bar
   ================================ */

.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, var(--cyan-500), var(--cyan-400), var(--blue-500));
    z-index: 200;
    transition: width 150ms ease-out;
    box-shadow: 0 2px 8px rgba(6, 182, 212, 0.3);
}

/* ================================
   Navigation - Enhanced & Responsive
   ================================ */

.article-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: all var(--transition-smooth);
}

.article-nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 4vw, 1.5rem);
}

.article-nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: clamp(56px, 10vw, 68px);
}

.nav-left {
    flex-shrink: 0;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: all var(--transition-base);
    gap: var(--space-2);
}

.logo-link:hover {
    opacity: 0.8;
    transform: translateY(-1px);
}

.logo-icon {
    width: clamp(24px, 5vw, 32px);
    height: clamp(24px, 5vw, 32px);
    color: var(--cyan-500);
    filter: drop-shadow(0 2px 4px rgba(6, 182, 212, 0.2));
}

.logo-text {
    font-size: clamp(1.125rem, 3vw, 1.375rem);
    font-weight: 700;
    color: var(--navy-900);
    font-family: var(--font-display);
    letter-spacing: -0.02em;
}

.nav-center {
    display: none;
}

@media (min-width: 768px) {
    .nav-center {
        display: block;
    }
}

.nav-links {
    display: flex;
    gap: clamp(1.5rem, 4vw, 2.5rem);
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--slate-600);
    text-decoration: none;
    position: relative;
    transition: color var(--transition-base);
    padding: var(--space-2) 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--cyan-500);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--cyan-500), var(--cyan-400));
    border-radius: var(--radius-full);
}

.nav-right {
    flex-shrink: 0;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: clamp(0.5rem, 2vw, 0.625rem) clamp(0.875rem, 3vw, 1.25rem);
    background: linear-gradient(135deg, var(--cyan-500), var(--cyan-600));
    color: var(--white);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    box-shadow: 0 2px 8px rgba(6, 182, 212, 0.25);
    white-space: nowrap;
}

.nav-cta:hover {
    background: linear-gradient(135deg, var(--cyan-600), var(--cyan-500));
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(6, 182, 212, 0.35);
}

/* Mobile Menu Toggle (if needed later) */
@media (max-width: 767px) {
    .nav-link {
        font-size: 0.8125rem;
    }
}

/* ================================
   Breadcrumbs - Responsive
   ================================ */

.breadcrumbs-wrapper {
    position: sticky;
    top: clamp(56px, 10vw, 68px);
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.breadcrumbs-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: clamp(0.625rem, 2vw, 0.875rem) clamp(1rem, 4vw, 1.5rem);
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    flex-wrap: wrap;
}

.breadcrumb-item {
    color: var(--slate-500);
    text-decoration: none;
    transition: color var(--transition-base);
}

.breadcrumb-item:hover {
    color: var(--cyan-500);
}

.breadcrumb-current {
    color: var(--navy-900);
    font-weight: 500;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@media (min-width: 640px) {
    .breadcrumb-current {
        max-width: 400px;
    }
}

.breadcrumb-separator {
    color: var(--gray-300);
    user-select: none;
}

/* ================================
   Loading State - Enhanced
   ================================ */

.loading-state {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-20) clamp(1rem, 4vw, 1.5rem);
}

.loading-container {
    text-align: center;
}

.loading-spinner {
    width: clamp(40px, 8vw, 56px);
    height: clamp(40px, 8vw, 56px);
    border: 3px solid var(--gray-200);
    border-top-color: var(--cyan-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--space-4);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    color: var(--slate-500);
    font-size: var(--text-base);
    font-weight: 500;
}

.hidden {
    display: none !important;
}

/* ================================
   Error State - Responsive
   ================================ */

.error-state {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-20) clamp(1rem, 4vw, 1.5rem);
}

.error-container {
    text-align: center;
    max-width: 600px;
    padding: 0 var(--space-4);
}

.error-title {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--navy-900);
    margin: 0 0 var(--space-4);
    line-height: 1.2;
}

.error-description {
    font-size: var(--text-lg);
    color: var(--slate-600);
    line-height: 1.6;
    margin: 0 0 var(--space-8);
}

.error-button {
    display: inline-block;
    padding: var(--space-3) var(--space-8);
    background: linear-gradient(135deg, var(--cyan-500), var(--cyan-600));
    color: var(--white);
    text-decoration: none;
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.error-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ================================
   Article Header - Responsive & Beautiful
   ================================ */

.article-header {
    background: linear-gradient(to bottom, var(--white), var(--gray-50));
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    margin-top: clamp(96px, 18vw, 136px);
}

.article-header-container {
    max-width: var(--max-width-article);
    margin: 0 auto;
    padding: clamp(2rem, 6vw, 4rem) clamp(1rem, 4vw, 1.5rem);
}

.article-categories {
    margin-bottom: var(--space-5);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.category-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-4);
    background: linear-gradient(135deg, var(--cyan-500), var(--cyan-600));
    color: var(--white);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-radius: var(--radius-full);
    box-shadow: 0 2px 8px rgba(6, 182, 212, 0.25);
}

.article-title {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.025em;
    color: var(--navy-900);
    margin: 0 0 var(--space-6);
    text-wrap: balance;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: clamp(0.5rem, 2vw, 0.75rem);
    flex-wrap: wrap;
    font-size: var(--text-sm);
    color: var(--slate-500);
}

.article-author {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.author-avatar {
    width: clamp(36px, 8vw, 44px);
    height: clamp(36px, 8vw, 44px);
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--white);
    box-shadow: var(--shadow-sm);
}

.author-name {
    font-weight: 600;
    color: var(--navy-900);
}

.meta-separator {
    color: var(--gray-300);
    user-select: none;
}

.article-date,
.article-reading-time {
    color: var(--slate-500);
    font-weight: 500;
}

/* ================================
   Featured Image - Responsive
   ================================ */

.featured-image-wrapper {
    background-color: var(--gray-50);
}

.featured-image-container {
    max-width: var(--max-width-article);
    margin: 0 auto;
    padding: 0 clamp(1rem, 4vw, 1.5rem);
}

.featured-image {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: var(--radius-xl);
    margin: clamp(1.5rem, 4vw, 2rem) 0;
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-smooth);
}

@media (max-width: 640px) {
    .featured-image {
        border-radius: var(--radius-lg);
        aspect-ratio: 4 / 3;
    }
}

/* Article Body & Layout - Responsive Grid
   ================================ */

.article-body-section {
    background-color: var(--white);
    padding: clamp(2rem, 6vw, 4rem) 0 clamp(3rem, 8vw, 5rem);
}

.article-body-container {
    max-width: var(--max-width-container);
    margin: 0 auto;
    padding: 0 clamp(1rem, 4vw, 1.5rem);
    overflow-x: hidden;
}

@media (max-width: 767px) {
    .article-body-container {
        padding: 0 1rem;
    }
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2rem, 6vw, 4rem);
}

@media (min-width: 1024px) {
    .article-layout {
        grid-template-columns: minmax(0, 1fr) var(--max-width-sidebar);
        gap: 4rem;
    }
}

/* ================================
   Article Content - Perfect Typography
   ================================ */

.article-content {
    font-size: var(--text-lg);
    line-height: 1.8;
    color: var(--slate-700);
    max-width: 100%;
}

.article-content > * {
    margin-bottom: clamp(1.25rem, 3vw, 1.75rem);
}

.article-content > *:last-child {
    margin-bottom: 0;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
    font-family: var(--font-display);
    color: var(--navy-900);
    font-weight: 700;
    line-height: 1.3;
    margin-top: clamp(2rem, 5vw, 3rem);
    margin-bottom: clamp(0.875rem, 2vw, 1.25rem);
    scroll-margin-top: 140px;
    text-wrap: balance;
}

.article-content h1 {
    font-size: var(--text-4xl);
    font-weight: 800;
}

.article-content h2 {
    font-size: var(--text-3xl);
    font-weight: 800;
    margin-top: clamp(2.5rem, 6vw, 4rem);
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--gray-200);
}

.article-content h3 {
    font-size: var(--text-2xl);
    margin-top: clamp(2rem, 4vw, 3rem);
}

.article-content h4 {
    font-size: var(--text-xl);
    margin-top: clamp(1.5rem, 3vw, 2.5rem);
}

.article-content p {
    margin-bottom: clamp(1.25rem, 3vw, 1.5rem);
    line-height: 1.8;
    text-align: justify;
    text-justify: inter-word;
    hyphens: auto;
    -webkit-hyphens: auto;
    -moz-hyphens: auto;
    word-spacing: -0.05em;
}

@media (max-width: 767px) {
    .article-content p {
        text-align: justify;
        text-justify: inter-word;
        hyphens: auto;
        -webkit-hyphens: auto;
        -moz-hyphens: auto;
    }
}

.article-content p:first-of-type {
    font-size: var(--text-xl);
    line-height: 1.85;
    color: var(--slate-600);
    font-weight: 400;
}

.article-content a {
    color: var(--cyan-600);
    text-decoration: none;
    border-bottom: 2px solid var(--cyan-200);
    transition: all var(--transition-base);
    padding-bottom: 1px;
}

.article-content a:hover {
    color: var(--cyan-700);
    border-bottom-color: var(--cyan-500);
    background-color: var(--cyan-50);
}

.article-content strong {
    font-weight: 700;
    color: var(--navy-900);
}

.article-content em {
    font-style: italic;
    color: var(--slate-600);
}

/* Lists - Enhanced */
.article-content ul,
.article-content ol {
    padding-left: clamp(1.25rem, 4vw, 1.75rem);
    margin-bottom: clamp(1.25rem, 3vw, 1.75rem);
}

.article-content li {
    margin-bottom: clamp(0.625rem, 2vw, 0.875rem);
    line-height: 1.8;
    padding-left: var(--space-2);
}

.article-content ul > li {
    list-style-type: none;
    position: relative;
}

.article-content ul > li::before {
    content: '';
    position: absolute;
    left: calc(-1 * clamp(1.25rem, 4vw, 1.75rem));
    top: 0.7em;
    width: 7px;
    height: 7px;
    background: linear-gradient(135deg, var(--cyan-500), var(--cyan-600));
    border-radius: 50%;
    box-shadow: 0 0 0 2px var(--cyan-100);
}

.article-content ol {
    counter-reset: list-counter;
}

.article-content ol > li {
    counter-increment: list-counter;
}

.article-content ol > li::marker {
    color: var(--cyan-600);
    font-weight: 700;
}

/* Blockquotes - Premium Style */
.article-content blockquote {
    border-left: 4px solid var(--cyan-500);
    padding: clamp(1rem, 3vw, 1.5rem) clamp(1.25rem, 4vw, 2rem);
    margin: clamp(1.5rem, 4vw, 2.5rem) 0;
    background: linear-gradient(to right, var(--cyan-50), transparent);
    border-radius: var(--radius-md);
    font-style: italic;
    color: var(--slate-700);
    position: relative;
    box-shadow: var(--shadow-sm);
}

@media (max-width: 767px) {
    .article-content blockquote {
        padding: 1rem;
        margin-left: 0;
        margin-right: 0;
    }
}

.article-content blockquote::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 10px;
    font-size: 4rem;
    color: var(--cyan-200);
    font-family: Georgia, serif;
    line-height: 1;
}

.article-content blockquote p {
    margin-bottom: 0.75rem;
}

.article-content blockquote p:last-child {
    margin-bottom: 0;
}

/* Code Blocks - Modern */
.article-content pre {
    background-color: var(--navy-900);
    color: var(--cyan-100);
    padding: clamp(1rem, 3vw, 1.5rem);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: clamp(1.5rem, 4vw, 2rem) 0;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    max-width: 100%;
    word-wrap: break-word;
    white-space: pre-wrap;
}

@media (max-width: 767px) {
    .article-content pre {
        padding: 0.875rem;
        border-radius: var(--radius-md);
        font-size: 0.8125rem;
        margin-left: -1rem;
        margin-right: -1rem;
        border-radius: 0;
    }
}

.article-content pre code {
    background: none;
    padding: 0;
    font-size: clamp(0.8125rem, 2vw, 0.875rem);
    color: inherit;
    border-radius: 0;
    word-break: break-word;
    white-space: pre-wrap;
}

.article-content code {
    background-color: var(--gray-100);
    color: var(--cyan-700);
    padding: 0.2em 0.5em;
    border-radius: var(--radius-xs);
    font-size: 0.9em;
    font-family: var(--font-mono);
    font-weight: 500;
    word-break: break-word;
}

@media (max-width: 767px) {
    .article-content code {
        font-size: 0.85em;
        padding: 0.15em 0.4em;
    }
}

/* Images - Responsive */
.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    margin: clamp(1.5rem, 4vw, 2.5rem) 0;
    box-shadow: var(--shadow-md);
}

@media (max-width: 767px) {
    .article-content img {
        border-radius: var(--radius-md);
        margin-left: -1rem;
        margin-right: -1rem;
        width: calc(100% + 2rem);
        max-width: calc(100% + 2rem);
    }
}

/* Horizontal Rule */
.article-content hr {
    border: none;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--gray-300), transparent);
    margin: clamp(2rem, 5vw, 3rem) 0;
}

/* Tables - Responsive */
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: clamp(1.5rem, 4vw, 2rem) 0;
    font-size: var(--text-sm);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-md);
    overflow: hidden;
}

@media (max-width: 767px) {
    .article-content table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        max-width: 100%;
    }
}

.article-content th {
    background: linear-gradient(135deg, var(--cyan-500), var(--cyan-600));
    color: var(--white);
    padding: var(--space-3) var(--space-4);
    text-align: left;
    font-weight: 600;
    font-size: 14px;
}

.article-content td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--gray-200);
    font-size: 14px;
}

.article-content tr:last-child td {
    border-bottom: none;
}

.article-content tr:nth-child(even) {
    background-color: var(--gray-50);
}

.article-content tr:hover {
    background-color: rgba(6, 182, 212, 0.05);
    transition: background-color 0.2s ease;
}

/* Table cell text formatting */
.article-content td strong,
.article-content th strong {
    color: var(--cyan-700);
    font-weight: 700;
}

/* Task Lists / Checkboxes */
.article-content .task-item {
    list-style: none;
    padding-left: 0;
    margin-left: -1.5rem;
}

.article-content .task-item input[type="checkbox"] {
    margin-right: 0.5rem;
    cursor: default;
}

/* Strikethrough text */
.article-content del {
    color: var(--gray-500);
    text-decoration: line-through;
}

/* Horizontal Rules */
.article-content hr {
    margin: 2rem 0;
    border: none;
    border-top: 2px solid var(--gray-200);
}

/* Enhanced Blockquotes */
.article-content blockquote {
    border-left: 4px solid var(--cyan-500);
    padding-left: 1rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--gray-700);
    background: linear-gradient(to right, rgba(6, 182, 212, 0.05), transparent);
    padding: 1rem 1rem 1rem 1.5rem;
    border-radius: 0 8px 8px 0;
}

/* ================================
   Info Boxes - Enhanced
   ================================ */

.article-content .info-box,
.article-content .warning-box,
.article-content .success-box,
.article-content .tip-box {
    padding: clamp(1rem, 3vw, 1.25rem) clamp(1.25rem, 4vw, 1.5rem);
    border-radius: var(--radius-lg);
    margin: clamp(1.5rem, 4vw, 2rem) 0;
    border-left: 4px solid;
    box-shadow: var(--shadow-sm);
}

.article-content .info-box {
    background-color: var(--blue-50);
    border-left-color: var(--blue-500);
    color: #1e40af;
}

.article-content .warning-box {
    background-color: var(--yellow-50);
    border-left-color: var(--amber-500);
    color: #92400e;
}

.article-content .success-box {
    background-color: var(--green-50);
    border-left-color: var(--green-500);
    color: #065f46;
}

.article-content .tip-box {
    background-color: var(--cyan-50);
    border-left-color: var(--cyan-500);
    color: #164e63;
}

/* ================================
   Internal Links Box - Responsive
   ================================ */

.internal-links-box {
    background: linear-gradient(135deg, var(--gray-50), var(--cyan-50));
    padding: clamp(1.5rem, 4vw, 2rem);
    border-radius: var(--radius-xl);
    margin: clamp(2rem, 5vw, 3rem) 0;
    border: 2px solid var(--cyan-100);
    box-shadow: var(--shadow-md);
}

.internal-links-title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--navy-900);
    margin-bottom: var(--space-5);
    font-family: var(--font-display);
}

.internal-links-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
}

@media (min-width: 640px) {
    .internal-links-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.internal-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background-color: var(--white);
    color: var(--cyan-600);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    font-weight: 600;
    border: 1px solid var(--gray-200);
}

.internal-link:hover {
    background-color: var(--cyan-500);
    color: var(--white);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.internal-link-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ================================
   Tags Section - Responsive
   ================================ */

.article-tags-section {
    margin: clamp(2rem, 5vw, 3rem) 0;
    padding-top: clamp(1.5rem, 4vw, 2rem);
    border-top: 2px solid var(--gray-200);
}

.tags-section-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--navy-900);
    margin-bottom: var(--space-4);
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.article-tag {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    background-color: var(--gray-100);
    color: var(--slate-600);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.article-tag:hover {
    background: linear-gradient(135deg, var(--cyan-500), var(--cyan-600));
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* ================================
   Author Bio Card - Responsive
   ================================ */

.author-bio-card {
    margin: clamp(2rem, 5vw, 3rem) 0;
    padding: clamp(1.5rem, 4vw, 2rem);
    background: linear-gradient(135deg, var(--gray-50), var(--white));
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
}

.author-bio-content {
    display: flex;
    gap: clamp(1rem, 3vw, 1.5rem);
    align-items: flex-start;
    flex-direction: column;
}

@media (min-width: 640px) {
    .author-bio-content {
        flex-direction: row;
    }
}

.author-bio-avatar {
    width: clamp(64px, 15vw, 80px);
    height: clamp(64px, 15vw, 80px);
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--white);
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.author-bio-text {
    flex: 1;
}

.author-bio-name {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--navy-900);
    margin-bottom: var(--space-2);
}

.author-bio-description {
    font-size: var(--text-base);
    color: var(--slate-600);
    line-height: 1.6;
}

/* ================================
   Sidebar - Responsive (Hidden on Mobile)
   ================================ */

.article-sidebar {
    position: sticky;
    top: 160px;
    align-self: flex-start;
    display: none;
}

@media (min-width: 1024px) {
    .article-sidebar {
        display: block;
    }
}

.sidebar-card {
    background-color: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base);
}

.sidebar-card:hover {
    box-shadow: var(--shadow-md);
}

.sidebar-card-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--navy-900);
    margin-bottom: var(--space-4);
    font-family: var(--font-display);
}

/* Table of Contents */
.toc-nav {
    display: flex;
    flex-direction: column;
}

.toc-item {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: var(--slate-600);
    text-decoration: none;
    font-size: var(--text-sm);
    border-left: 2px solid var(--gray-200);
    transition: all var(--transition-base);
    margin-bottom: var(--space-1);
}

.toc-item:hover {
    color: var(--cyan-600);
    border-left-color: var(--cyan-500);
    background-color: var(--cyan-50);
}

.toc-item.active {
    color: var(--cyan-600);
    font-weight: 600;
    border-left-color: var(--cyan-500);
    background-color: var(--cyan-50);
}

.toc-item-sub {
    padding-left: var(--space-6);
    font-size: var(--text-xs);
}

/* Newsletter Card */
.newsletter-card {
    background: linear-gradient(135deg, var(--cyan-500), var(--cyan-600));
    color: var(--white);
}

.newsletter-title {
    color: var(--white);
    margin-bottom: var(--space-3);
}

.newsletter-description {
    font-size: var(--text-sm);
    color: var(--cyan-50);
    margin-bottom: var(--space-5);
    line-height: 1.6;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.newsletter-input {
    padding: var(--space-3);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--navy-900);
    transition: all var(--transition-base);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--white);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.newsletter-button {
    padding: var(--space-3);
    background-color: var(--white);
    color: var(--cyan-600);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.newsletter-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Author Card */
.sidebar-author {
    text-align: center;
}

.sidebar-author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto var(--space-4);
    border: 3px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.sidebar-author-name {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--navy-900);
    margin-bottom: var(--space-1);
}

.sidebar-author-title {
    font-size: var(--text-sm);
    color: var(--cyan-600);
    margin-bottom: var(--space-3);
}

.sidebar-author-bio {
    font-size: var(--text-sm);
    color: var(--slate-600);
    line-height: 1.6;
}

/* ================================
   Share Sidebar (Desktop Only)
   ================================ */

.share-sidebar {
    position: fixed;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    display: none;
    flex-direction: column;
    gap: var(--space-3);
    z-index: 50;
}

@media (min-width: 1280px) {
    .share-sidebar {
        display: flex;
    }
}

.share-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--white);
    color: var(--slate-600);
    border: 1px solid var(--gray-200);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.share-twitter:hover {
    background-color: #1DA1F2;
    color: var(--white);
    border-color: #1DA1F2;
}

.share-linkedin:hover {
    background-color: #0A66C2;
    color: var(--white);
    border-color: #0A66C2;
}

.share-facebook:hover {
    background-color: #1877F2;
    color: var(--white);
    border-color: #1877F2;
}

.share-copy:hover {
    background-color: var(--cyan-500);
    color: var(--white);
    border-color: var(--cyan-500);
}

.share-icon {
    width: 20px;
    height: 20px;
}

/* ================================
   Mobile Share Bar
   ================================ */

.mobile-share-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    border-top: 1px solid var(--gray-200);
    padding: var(--space-3) var(--space-4);
    display: flex;
    justify-content: space-around;
    gap: var(--space-2);
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
}

@media (min-width: 768px) {
    .mobile-share-bar {
        display: none;
    }
}

.mobile-share-btn {
    flex: 1;
    max-width: 80px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-100);
    color: var(--slate-600);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.mobile-share-btn:active {
    transform: scale(0.95);
}

.mobile-share-icon {
    width: 22px;
    height: 22px;
}

/* ================================
   CTA Section - Responsive
   ================================ */

.article-cta-section {
    background: linear-gradient(135deg, var(--cyan-500), var(--cyan-600));
    padding: clamp(3rem, 8vw, 5rem) 0;
    margin: clamp(3rem, 8vw, 5rem) 0 0;
}

.article-cta-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 4vw, 1.5rem);
}

.article-cta-content {
    text-align: center;
    color: var(--white);
}

.cta-title {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
    line-height: 1.2;
}

.cta-description {
    font-size: var(--text-xl);
    color: var(--cyan-50);
    margin-bottom: var(--space-8);
    line-height: 1.6;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-8);
    background-color: var(--white);
    color: var(--cyan-600);
    text-decoration: none;
    font-size: var(--text-lg);
    font-weight: 700;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.cta-button-icon {
    width: 20px;
    height: 20px;
}

/* ================================
   Related Posts - Responsive Grid
   ================================ */

.related-posts-section {
    padding: clamp(3rem, 8vw, 5rem) 0;
    background-color: var(--gray-50);
}

.related-posts-container {
    max-width: var(--max-width-container);
    margin: 0 auto;
    padding: 0 clamp(1rem, 4vw, 1.5rem);
}

.related-posts-title {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 800;
    color: var(--navy-900);
    margin-bottom: clamp(2rem, 5vw, 3rem);
    text-align: center;
}

.related-posts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(1.5rem, 4vw, 2rem);
}

@media (min-width: 640px) {
    .related-posts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .related-posts-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.related-post-card {
    background-color: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-smooth);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.related-post-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.related-post-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.related-post-image-wrapper {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background-color: var(--gray-100);
}

.related-post-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.related-post-card:hover .related-post-image {
    transform: scale(1.05);
}

.related-post-content {
    padding: clamp(1rem, 3vw, 1.5rem);
}

.related-post-title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--navy-900);
    margin-bottom: var(--space-3);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-post-excerpt {
    font-size: var(--text-sm);
    color: var(--slate-600);
    line-height: 1.6;
    margin-bottom: var(--space-3);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-post-meta {
    font-size: var(--text-xs);
    color: var(--slate-500);
    font-weight: 500;
}

/* ================================
   Footer - Responsive
   ================================ */

.article-footer {
    background-color: var(--navy-900);
    color: var(--gray-300);
    padding: clamp(2rem, 5vw, 3rem) 0;
}

.article-footer-container {
    max-width: var(--max-width-container);
    margin: 0 auto;
    padding: 0 clamp(1rem, 4vw, 1.5rem);
}

.article-footer-content {
    text-align: center;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    margin-bottom: var(--space-4);
    transition: opacity var(--transition-base);
}

.footer-logo:hover {
    opacity: 0.8;
}

.footer-logo-icon {
    width: 32px;
    height: 32px;
    color: var(--cyan-400);
}

.footer-logo-text {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--white);
    font-family: var(--font-display);
}

.footer-copyright {
    font-size: var(--text-sm);
    color: var(--gray-400);
}

/* ================================
   Copy Toast Notification
   ================================ */

.copy-toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background-color: var(--navy-900);
    color: var(--white);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    opacity: 0;
    transition: all var(--transition-smooth);
    z-index: 150;
    box-shadow: var(--shadow-xl);
    pointer-events: none;
}

.copy-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ================================
   Responsive Utilities
   ================================ */

@media (max-width: 767px) {
    .article-header {
        margin-top: 100px;
    }
    
    .article-body-section {
        padding-bottom: 80px; /* Space for mobile share bar */
    }
    
    .share-sidebar {
        display: none !important;
    }
    
    /* Justify text content on mobile */
    .article-content h1,
    .article-content h2,
    .article-content h3,
    .article-content h4,
    .article-content h5,
    .article-content h6 {
        text-align: left;
    }
    
    .article-content blockquote {
        text-align: justify;
        text-justify: inter-word;
    }
    
    .article-content blockquote p {
        text-align: justify;
        text-justify: inter-word;
    }
    
    .article-content ul,
    .article-content ol {
        text-align: left;
        margin-left: auto;
        margin-right: auto;
        max-width: 100%;
    }
    
    .article-content li {
        text-align: justify;
        text-justify: inter-word;
    }
    
    /* Prevent horizontal overflow */
    .article-content {
        overflow-x: hidden;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    .article-content * {
        max-width: 100%;
    }
}

/* ================================
   Print Styles
   ================================ */

@media print {
    .article-nav,
    .breadcrumbs-wrapper,
    .share-sidebar,
    .mobile-share-bar,
    .article-sidebar,
    .article-cta-section,
    .related-posts-section,
    .article-footer,
    .reading-progress-bar {
        display: none !important;
    }
    
    .article-page {
        background: white;
    }
    
    .article-content {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    .article-content a {
        text-decoration: underline;
        color: black;
    }
}

/* ================================
   Accessibility Enhancements
   ================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible styles for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 3px solid var(--cyan-500);
    outline-offset: 2px;
}