/* ============================================
           PROXIMA — Universal Article Design System
           v1.0 | Enterprise Publishing Platform
           
           Design: Apple Editorial × Stripe Blog × Linear
           Architecture: Fully reusable, infinitely scalable
           No content changes — Pure design system
           ============================================ */

        /* --------------------------------------------
           1. DESIGN TOKENS (Global Variables)
        -------------------------------------------- */
        :root {
            /* Color — Neutral foundation, accent optional */
            --prox-bg: #ffffff;
            --prox-bg-subtle: #fafafa;
            --prox-bg-muted: #f5f5f5;
            --prox-bg-elevated: #ffffff;
            
            --prox-text: #111111;
            --prox-text-light: #3a3a3a;
            --prox-text-muted: #6b6b6b;
            --prox-text-disabled: #9a9a9a;
            
            --prox-border: #e5e5e5;
            --prox-border-strong: #cccccc;
            
            --prox-accent: #c41e3a;
            --prox-accent-subtle: rgba(196, 30, 58, 0.1);
            --prox-info: #1a5f7a;
            --prox-success: #2c5f2d;
            --prox-warning: #d47c2a;
            
            /* Typography Scale */
            --prox-font-sans: -apple-system, 'Inter', 'SF Pro Text', system-ui, sans-serif;
            --prox-font-serif: 'Georgia', 'Times New Roman', 'Charter', serif;
            --prox-font-mono: 'SF Mono', 'Monaco', monospace;
            
            --prox-text-xs: 0.75rem;
            --prox-text-sm: 0.875rem;
            --prox-text-base: 1rem;
            --prox-text-md: 1.125rem;
            --prox-text-lg: 1.25rem;
            --prox-text-xl: 1.5rem;
            --prox-text-2xl: 1.875rem;
            --prox-text-3xl: 2.25rem;
            --prox-text-4xl: 3rem;
            
            /* Spacing Scale (8px rhythm) */
            --prox-space-0: 0;
            --prox-space-1: 0.25rem;
            --prox-space-2: 0.5rem;
            --prox-space-3: 0.75rem;
            --prox-space-4: 1rem;
            --prox-space-5: 1.5rem;
            --prox-space-6: 2rem;
            --prox-space-7: 2.5rem;
            --prox-space-8: 3rem;
            --prox-space-9: 4rem;
            --prox-space-10: 5rem;
            --prox-space-11: 6rem;
            --prox-space-12: 8rem;
            
            /* Line Heights */
            --prox-leading-tight: 1.2;
            --prox-leading-snug: 1.3;
            --prox-leading-normal: 1.45;
            --prox-leading-relaxed: 1.65;
            --prox-leading-loose: 1.75;
            
            /* Layout */
            --prox-max-width-measure: 48rem;
            --prox-max-width-normal: 64rem;
            --prox-gutter: 1.5rem;
            
            /* Effects */
            --prox-radius-sm: 0.5rem;
            --prox-radius-md: 0.75rem;
            --prox-radius-lg: 1rem;
            --prox-radius-xl: 1.5rem;
            
            --prox-shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --prox-shadow-sm: 0 1px 4px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
            --prox-shadow-md: 0 8px 20px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.03);
            --prox-shadow-lg: 0 20px 40px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
            
            /* Transitions */
            --prox-transition: 0.2s ease;
            
            /* Z-index */
            --prox-z-base: 1;
            --prox-z-sticky: 10;
            --prox-z-overlay: 100;
        }

        /* Dark mode — Automatic */
        @media (prefers-color-scheme: dark) {
            :root {
                --prox-bg: #0a0a0a;
                --prox-bg-subtle: #141414;
                --prox-bg-muted: #1c1c1c;
                --prox-bg-elevated: #141414;
                --prox-text: #ededed;
                --prox-text-light: #b0b0b0;
                --prox-text-muted: #7a7a7a;
                --prox-border: #2a2a2a;
                --prox-border-strong: #3a3a3a;
                --prox-accent-subtle: rgba(196, 30, 58, 0.15);
            }
        }

        /* --------------------------------------------
           2. BASE & RESET (Minimal, Non-intrusive)
        -------------------------------------------- */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        /* --------------------------------------------
           3. MAIN CONTAINER (Semantic)
        -------------------------------------------- */
        .prox-container {
            max-width: var(--prox-max-width-normal);
            margin: 0 auto;
            padding: 0 var(--prox-gutter);
            background: var(--prox-bg);
        }

        /* Article wrapper — typography foundation */
        .prox-article {
            font-family: var(--prox-font-serif);
            font-size: var(--prox-text-base);
            line-height: var(--prox-leading-relaxed);
            color: var(--prox-text);
            background: var(--prox-bg);
            -webkit-font-smoothing: antialiased;
        }

        /* --------------------------------------------
           4. TYPOGRAPHY (Semantic, Hierarchical)
        -------------------------------------------- */
        .prox-article h1 {
            font-family: var(--prox-font-sans);
            font-size: clamp(var(--prox-text-3xl), 8vw, var(--prox-text-4xl));
            font-weight: 700;
            line-height: var(--prox-leading-tight);
            letter-spacing: -0.02em;
            margin-top: var(--prox-space-9);
            margin-bottom: var(--prox-space-5);
            color: var(--prox-text);
        }

        .prox-article h2 {
            font-family: var(--prox-font-sans);
            font-size: clamp(var(--prox-text-xl), 5vw, var(--prox-text-3xl));
            font-weight: 650;
            line-height: var(--prox-leading-snug);
            letter-spacing: -0.01em;
            margin-top: var(--prox-space-10);
            margin-bottom: var(--prox-space-4);
            padding-top: var(--prox-space-4);
            color: var(--prox-text);
            border-top: 1px solid var(--prox-border);
        }

        .prox-article h3 {
            font-family: var(--prox-font-sans);
            font-size: clamp(var(--prox-text-lg), 4vw, var(--prox-text-xl));
            font-weight: 600;
            line-height: var(--prox-leading-snug);
            margin-top: var(--prox-space-8);
            margin-bottom: var(--prox-space-3);
            color: var(--prox-text);
        }

        .prox-article h4 {
            font-family: var(--prox-font-sans);
            font-size: var(--prox-text-md);
            font-weight: 600;
            margin-top: var(--prox-space-6);
            margin-bottom: var(--prox-space-2);
            color: var(--prox-text-light);
        }

        .prox-article p {
            margin-bottom: var(--prox-space-5);
            font-size: var(--prox-text-md);
            line-height: var(--prox-leading-relaxed);
        }

        /* First paragraph after heading — visual emphasis */
        .prox-article h2 + p,
        .prox-article h3 + p {
            font-size: var(--prox-text-lg);
            line-height: var(--prox-leading-normal);
            color: var(--prox-text-light);
        }

        /* Links */
        .prox-article a {
            color: var(--prox-accent);
            text-decoration: none;
            border-bottom: 1px solid var(--prox-accent-subtle);
            transition: all var(--prox-transition);
        }

        .prox-article a:hover {
            border-bottom-color: var(--prox-accent);
        }

        /* Strong & Emphasis */
        .prox-article strong {
            font-weight: 650;
            color: var(--prox-text);
        }

        .prox-article em {
            font-style: italic;
            color: var(--prox-text-light);
        }
        /* --------------------------------------------
           5. LISTS (Clean, Intentional)
        -------------------------------------------- */
        .prox-article ul,
        .prox-article ol {
            margin: var(--prox-space-5) 0;
            padding-left: var(--prox-space-6);
        }

        .prox-article li {
            margin-bottom: var(--prox-space-2);
            line-height: var(--prox-leading-relaxed);
        }

        .prox-article ul li {
            list-style-type: none;
            position: relative;
            padding-left: var(--prox-space-5);
        }

        .prox-article ul li::before {
            content: "—";
            position: absolute;
            left: 0;
            color: var(--prox-accent);
        }

        .prox-article ol {
            counter-reset: prox-counter;
        }

        .prox-article ol li {
            list-style-type: none;
            counter-increment: prox-counter;
            position: relative;
            padding-left: var(--prox-space-6);
        }

        .prox-article ol li::before {
            content: counter(prox-counter) ".";
            position: absolute;
            left: 0;
            color: var(--prox-accent);
            font-weight: 600;
        }

        /* --------------------------------------------
           6. IMAGES & FIGURES (Universal, Flexible)
           One common image system for ALL use cases
        -------------------------------------------- */

        /* Base figure — universal container */
        .prox-figure {
            margin: var(--prox-space-8) 0;
            text-align: center;
        }

        /* Universal image — works everywhere, always responsive */
        .prox-image {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 0 auto;
            border-radius: var(--prox-radius-xl);
            box-shadow: var(--prox-shadow-md);
            transition: transform var(--prox-transition), box-shadow var(--prox-transition);
        }

        .prox-image:hover {
            transform: scale(1.005);
            box-shadow: var(--prox-shadow-lg);
        }

        /* Caption — universal, always consistent */
        .prox-caption {
            margin-top: var(--prox-space-3);
            font-size: var(--prox-text-sm);
            color: var(--prox-text-muted);
            font-family: var(--prox-font-sans);
            text-align: center;
            letter-spacing: 0.01em;
            line-height: var(--prox-leading-normal);
        }

        /* COMPARISON IMAGES — Two-up layout (fully responsive, same size) */
        .prox-comparison {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--prox-space-5);
            margin: var(--prox-space-8) 0;
        }

        .prox-comparison .prox-figure {
            margin: 0;
        }

        .prox-comparison .prox-image {
            border-radius: var(--prox-radius-lg);
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }

        /* Responsive comparison */
        @media (max-width: 768px) {
            .prox-comparison {
                grid-template-columns: 1fr;
                gap: var(--prox-space-6);
            }
            
            .prox-comparison .prox-figure:first-child {
                margin-bottom: 0;
            }
        }

        /* GALLERY — Multiple images (flexible grid) */
        .prox-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: var(--prox-space-5);
            margin: var(--prox-space-8) 0;
        }

        .prox-gallery .prox-figure {
            margin: 0;
        }

        .prox-gallery .prox-image {
            border-radius: var(--prox-radius-lg);
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }

        @media (max-width: 640px) {
            .prox-gallery {
                grid-template-columns: 1fr !important;
                gap: var(--prox-space-4);
            }
        }

        /* IMAGE PLACEHOLDER — Universal, Industry Standard */
        .prox-image-placeholder {
            width: 100%;
            background: var(--prox-bg-muted);
            border: 2px dashed var(--prox-border-strong);
            border-radius: var(--prox-radius-xl);
            padding: var(--prox-space-8);
            text-align: center;
            color: var(--prox-text-muted);
            font-family: var(--prox-font-sans);
            font-size: var(--prox-text-sm);
            min-height: 300px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: var(--prox-space-3);
            aspect-ratio: 16/9;
        }

        .prox-image-placeholder .prox-icon {
            font-size: 3.5rem;
            opacity: 0.6;
            margin-bottom: var(--prox-space-2);
        }

        .prox-image-placeholder .prox-label {
            font-weight: 500;
            font-size: var(--prox-text-base);
            color: var(--prox-text-light);
        }

        .prox-image-placeholder .prox-sub {
            font-size: var(--prox-text-sm);
            color: var(--prox-text-disabled);
        }

        /* COMPARISON PLACEHOLDER — Same size, consistent */
        .prox-comparison .prox-image-placeholder {
            min-height: 200px;
            aspect-ratio: 16/9;
            padding: var(--prox-space-6);
        }

        .prox-comparison .prox-image-placeholder .prox-icon {
            font-size: 2.5rem;
        }

        /* Responsive placeholders */
        @media (max-width: 768px) {
            .prox-image-placeholder {
                min-height: 200px;
                padding: var(--prox-space-6);
            }
            
            .prox-image-placeholder .prox-icon {
                font-size: 2.5rem;
            }
        }

        @media (max-width: 480px) {
            .prox-image-placeholder {
                min-height: 150px;
                padding: var(--prox-space-4);
            }
            
            .prox-image-placeholder .prox-icon {
                font-size: 2rem;
            }
            
            .prox-image-placeholder .prox-label {
                font-size: var(--prox-text-sm);
            }
            
            .prox-image-placeholder .prox-sub {
                font-size: var(--prox-text-xs);
            }
        }

        /* --------------------------------------------
           7. TABLES (Enterprise-grade, Responsive)
        -------------------------------------------- */
        .prox-table-wrapper {
            margin: var(--prox-space-8) 0;
            overflow-x: auto;
            border-radius: var(--prox-radius-lg);
            border: 1px solid var(--prox-border);
            background: var(--prox-bg);
            -webkit-overflow-scrolling: touch;
        }

        .prox-table {
            width: 100%;
            border-collapse: collapse;
            font-family: var(--prox-font-sans);
            font-size: var(--prox-text-sm);
        }

        .prox-table thead th {
            background: var(--prox-bg-subtle);
            padding: var(--prox-space-4) var(--prox-space-5);
            text-align: left;
            font-weight: 650;
            font-size: var(--prox-text-xs);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--prox-text-muted);
            border-bottom: 2px solid var(--prox-border-strong);
        }

        .prox-table tbody td {
            padding: var(--prox-space-4) var(--prox-space-5);
            border-bottom: 1px solid var(--prox-border);
            color: var(--prox-text);
        }

        .prox-table tbody tr:last-child td {
            border-bottom: none;
        }

        .prox-table tbody tr:hover td {
            background: var(--prox-bg-muted);
        }

        .prox-table td:first-child,
        .prox-table th:first-child {
            font-weight: 600;
        }

        .prox-table th:not(:first-child),
        .prox-table td:not(:first-child) {
            text-align: center;
        }

        .prox-badge-check {
            color: var(--prox-success);
            font-weight: 600;
        }
        .prox-badge-check::before {
            content: "✓ ";
        }

        .prox-badge-cross {
            color: var(--prox-accent);
            font-weight: 600;
        }
        .prox-badge-cross::before {
            content: "✗ ";
        }

        @media (max-width: 768px) {
            .prox-table thead th,
            .prox-table tbody td {
                padding: var(--prox-space-3);
                font-size: var(--prox-text-xs);
            }
        }

        /* --------------------------------------------
           8. CARD GRID (Universal — 1 system, infinite use)
        -------------------------------------------- */
        .prox-card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--prox-space-6);
            margin: var(--prox-space-8) 0;
        }

        .prox-card {
            background: var(--prox-bg-elevated);
            border: 1px solid var(--prox-border);
            border-radius: var(--prox-radius-xl);
            padding: var(--prox-space-6);
            transition: all var(--prox-transition);
            position: relative;
            overflow: hidden;
        }

        .prox-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--prox-accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.25s ease;
        }

        .prox-card:hover {
            transform: translateY(-4px);
            border-color: var(--prox-border-strong);
            box-shadow: var(--prox-shadow-md);
        }

        .prox-card:hover::before {
            transform: scaleX(1);
        }

        .prox-card-icon {
            width: 52px;
            height: 52px;
            background: var(--prox-bg-muted);
            border-radius: var(--prox-radius-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: var(--prox-space-4);
        }

        .prox-card h3 {
            margin-top: 0;
            margin-bottom: var(--prox-space-2);
            font-size: var(--prox-text-lg);
        }

        .prox-card p {
            margin-bottom: 0;
            color: var(--prox-text-muted);
            font-size: var(--prox-text-sm);
            line-height: var(--prox-leading-normal);
        }

        .prox-card--featured {
            background: var(--prox-bg-subtle);
            border-color: var(--prox-accent);
        }

        /* --------------------------------------------
           9. CALLOUTS (Semantic, Accessible)
        -------------------------------------------- */
        .prox-callout {
            margin: var(--prox-space-7) 0;
            padding: var(--prox-space-6) var(--prox-space-7);
            border-left: 4px solid;
            border-radius: var(--prox-radius-lg);
            background: var(--prox-bg-subtle);
        }

        .prox-callout-title {
            font-family: var(--prox-font-sans);
            font-weight: 700;
            font-size: var(--prox-text-sm);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: var(--prox-space-3);
            display: flex;
            align-items: center;
            gap: var(--prox-space-2);
        }

        .prox-callout p {
            margin-bottom: 0;
            font-size: var(--prox-text-base);
        }

        .prox-callout p:not(:last-child) {
            margin-bottom: var(--prox-space-4);
        }

        .prox-callout--info {
            border-left-color: var(--prox-info);
            background: var(--prox-info-bg, rgba(26, 95, 122, 0.05));
        }
        .prox-callout--info .prox-callout-title { color: var(--prox-info); }

        .prox-callout--warning {
            border-left-color: var(--prox-warning);
            background: rgba(212, 124, 42, 0.05);
        }
        .prox-callout--warning .prox-callout-title { color: var(--prox-warning); }

        .prox-callout--success {
            border-left-color: var(--prox-success);
            background: rgba(44, 95, 45, 0.05);
        }
        .prox-callout--success .prox-callout-title { color: var(--prox-success); }

        /* --------------------------------------------
           10. BLOCKQUOTES (Editorial, Memorable)
        -------------------------------------------- */
        .prox-article blockquote {
            margin: var(--prox-space-8) 0;
            padding: var(--prox-space-5) 0 var(--prox-space-5) var(--prox-space-7);
            font-family: var(--prox-font-serif);
            font-size: var(--prox-text-lg);
            line-height: var(--prox-leading-snug);
            font-style: italic;
            color: var(--prox-text-light);
            border-left: 3px solid var(--prox-accent);
            position: relative;
        }

        .prox-article blockquote::before {
            content: '"';
            position: absolute;
            left: -0.5rem;
            top: -1rem;
            font-size: 4rem;
            color: var(--prox-accent);
            opacity: 0.2;
            font-family: var(--prox-font-serif);
        }

        /* --------------------------------------------
           11. FAQ (Accordion — Accessible, Native)
        -------------------------------------------- */
        .prox-faq {
            margin: var(--prox-space-8) 0;
        }

        .prox-faq details {
            margin-bottom: var(--prox-space-3);
            border: 1px solid var(--prox-border);
            border-radius: var(--prox-radius-lg);
            background: var(--prox-bg);
            transition: all var(--prox-transition);
        }

        .prox-faq details:hover {
            border-color: var(--prox-border-strong);
        }

        .prox-faq summary {
            padding: var(--prox-space-5) var(--prox-space-6);
            font-weight: 600;
            font-family: var(--prox-font-sans);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: var(--prox-space-4);
            color: var(--prox-text);
        }

        .prox-faq summary::-webkit-details-marker {
            display: none;
        }

        .prox-faq summary::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 400;
            color: var(--prox-accent);
            transition: transform 0.2s ease;
        }

        .prox-faq details[open] summary::after {
            transform: rotate(45deg);
        }

        .prox-faq details[open] {
            background: var(--prox-bg-subtle);
        }

        .prox-faq details[open] summary {
            border-bottom: 1px solid var(--prox-border);
            margin-bottom: 0;
        }

        .prox-faq-answer {
            padding: var(--prox-space-5) var(--prox-space-6);
            padding-top: var(--prox-space-4);
            color: var(--prox-text-muted);
            line-height: var(--prox-leading-relaxed);
        }

        /* --------------------------------------------
           12. CODE (Inline & Blocks)
        -------------------------------------------- */
        .prox-article code {
            font-family: var(--prox-font-mono);
            font-size: 0.9em;
            padding: 0.2em 0.4em;
            background: var(--prox-bg-muted);
            border-radius: var(--prox-radius-sm);
            color: var(--prox-text);
        }

        .prox-article pre {
            margin: var(--prox-space-7) 0;
            padding: var(--prox-space-5);
            background: var(--prox-bg-subtle);
            border: 1px solid var(--prox-border);
            border-radius: var(--prox-radius-lg);
            overflow-x: auto;
            font-family: var(--prox-font-mono);
            font-size: var(--prox-text-sm);
            line-height: var(--prox-leading-normal);
        }

        .prox-article pre code {
            background: none;
            padding: 0;
        }

        /* --------------------------------------------
           13. DIVIDERS
        -------------------------------------------- */
        .prox-divider {
            margin: var(--prox-space-9) 0;
            border: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--prox-border), transparent);
        }

/* ===========================
   Premium CTA Buttons
=========================== */

.prox-button-group{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:18px;
}

.prox-button{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;

    padding:13px 22px;
    min-height:46px;

    background:#ffffff;
    color:#111827;

    border:1px solid #dbe2ea;
    border-radius:12px;

    font-size:15px;
    font-weight:600;
    line-height:1;

    text-decoration:none;
    white-space:nowrap;

    box-shadow:
        0 1px 2px rgba(16,24,40,.04),
        0 4px 10px rgba(16,24,40,.05);

    transition:
        background .25s ease,
        border-color .25s ease,
        box-shadow .25s ease,
        transform .2s ease,
        color .25s ease;
}

.prox-button:hover{
    background:#f8fafc;
    border-color:#cbd5e1;
    color:#0f172a;

    transform:translateY(-2px);

    box-shadow:
        0 8px 20px rgba(16,24,40,.08),
        0 2px 6px rgba(16,24,40,.05);
}

.prox-button:active{
    transform:translateY(0);
}

.prox-button::after{
    content:"→";
    font-size:16px;
    transition:transform .25s ease;
}

.prox-button:hover::after{
    transform:translateX(4px);
}

/* Secondary Button */

.prox-button-secondary{
    background:transparent;
    color:#475467;
    border-color:#e4e7ec;
    box-shadow:none;
}

.prox-button-secondary:hover{
    background:#f9fafb;
    color:#111827;
    border-color:#d0d5dd;
    box-shadow:none;
}

.prox-button:focus-visible{
    outline:none;
    border-color:#94a3b8;
    box-shadow:
        0 0 0 4px rgba(148,163,184,.18);
}

@media (max-width:640px){

    .prox-button-group{
        flex-direction:column;
    }

    .prox-button{
        width:100%;
    }

}
        /* --------------------------------------------
           14. PROX-STEP SYSTEM — Premium Visual Steps
        -------------------------------------------- */
        .prox-steps {
            display: flex;
            flex-direction: column;
            gap: var(--prox-space-5);
            margin: var(--prox-space-7) 0;
            counter-reset: step-counter;
        }

        .prox-step {
            display: flex;
            gap: var(--prox-space-5);
            align-items: flex-start;
            padding: var(--prox-space-5);
            background: var(--prox-bg-subtle);
            border-radius: var(--prox-radius-xl);
            border: 1px solid var(--prox-border);
            transition: all var(--prox-transition);
            position: relative;
        }

        .prox-step:hover {
            background: var(--prox-bg-muted);
            border-color: var(--prox-accent);
            transform: translateX(4px);
            box-shadow: var(--prox-shadow-sm);
        }

        .prox-step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: var(--prox-accent);
            color: #ffffff;
            font-family: var(--prox-font-sans);
            font-weight: 700;
            font-size: var(--prox-text-lg);
            border-radius: var(--prox-radius-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(196, 30, 58, 0.25);
            position: relative;
            counter-increment: step-counter;
        }

        .prox-step-number::before {
            content: counter(step-counter);
        }

        .prox-step-content {
            flex: 1;
            min-width: 0;
        }

        .prox-step-content h4 {
            margin: 0 0 var(--prox-space-2) 0;
            font-size: var(--prox-text-lg);
            font-weight: 650;
            color: var(--prox-text);
            font-family: var(--prox-font-sans);
        }

        .prox-step-content p {
            margin: 0;
            font-size: var(--prox-text-base);
            line-height: var(--prox-leading-relaxed);
            color: var(--prox-text-light);
        }

        .prox-step-content ul {
            margin: var(--prox-space-3) 0 0 0;
            padding-left: var(--prox-space-5);
        }

        .prox-step-content ul li {
            font-size: var(--prox-text-base);
            color: var(--prox-text-light);
        }

        .prox-step--featured {
            background: var(--prox-bg-elevated);
            border-color: var(--prox-accent);
            box-shadow: var(--prox-shadow-sm);
        }

        .prox-step--featured .prox-step-number {
            background: var(--prox-accent);
            box-shadow: 0 4px 16px rgba(196, 30, 58, 0.35);
        }

        @media (max-width: 640px) {
            .prox-step {
                flex-direction: column;
                align-items: stretch;
                padding: var(--prox-space-4);
            }

            .prox-step-number {
                width: 40px;
                height: 40px;
                font-size: var(--prox-text-base);
            }
        }

        /* --------------------------------------------
           15. UTILITIES (Layout & Spacing)
        -------------------------------------------- */
        .prox-text-small { font-size: var(--prox-text-sm); color: var(--prox-text-muted); }
        .prox-text-muted { color: var(--prox-text-muted); }
        .prox-text-accent { color: var(--prox-accent); }
        .prox-mt-8 { margin-top: var(--prox-space-8); }
        .prox-mb-8 { margin-bottom: var(--prox-space-8); }
        .prox-text-center { text-align: center; }

/* ==========================================
  16. ARTICLE META CARDS
========================================== */

.article-header{
    margin-bottom:32px;
}

.article-meta-grid{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:12px;
    margin-top:20px;
}

.meta-card{
    display:flex;
    align-items:center;
    gap:12px;
    padding:14px 16px;
    background:var(--prox-bg-elevated);
    border:1px solid var(--prox-border);
    border-radius:14px;
    transition:all .2s ease;
    min-width:0;
}

.meta-card:hover{
    border-color:var(--prox-border-strong);
    box-shadow:var(--prox-shadow-sm);
    transform:translateY(-2px);
}

.meta-icon{
    display:flex;
    align-items:center;
    justify-content:center;
    width:38px;
    height:38px;
    border-radius:10px;
    background:var(--prox-bg-muted);
    color:var(--prox-text-light);
    flex-shrink:0;
}

.meta-icon svg{
    width:18px;
    height:18px;
}

.meta-content{
    display:flex;
    flex-direction:column;
    gap:2px;
    min-width:0;
}

.meta-label{
    font-family:var(--prox-font-sans);
    font-size:11px;
    font-weight:600;
    text-transform:uppercase;
    letter-spacing:.06em;
    color:var(--prox-text-muted);
}

.meta-value{
    font-family:var(--prox-font-sans);
    font-size:14px;
    font-weight:600;
    line-height:1.3;
    color:var(--prox-text);
    word-break:break-word;
}

/* Fix article link styling */

.meta-value,
.meta-value:link,
.meta-value:visited,
.meta-value:hover,
.meta-value:active{
    text-decoration:none !important;
    border-bottom:none !important;
}

a.meta-value{
    color:var(--prox-text);
}

a.meta-value:hover{
    color:var(--prox-accent);
}

/* Small Tablets */

@media (max-width:992px){

    .article-meta-grid{
        grid-template-columns:repeat(3,minmax(0,1fr));
    }
}

/* Mobile */

@media (max-width:640px){

    .article-meta-grid{
        grid-template-columns:repeat(2,minmax(0,1fr));
        gap:10px;
    }

    .meta-card{
        padding:12px;
        gap:10px;
    }

    .meta-icon{
        width:34px;
        height:34px;
    }

    .meta-icon svg{
        width:16px;
        height:16px;
    }

    .meta-label{
        font-size:10px;
    }

    .meta-value{
        font-size:13px;
    }
}
/* ==========================================
  17. TABLE OF CONTENTS - Clean Version (No Numbers)
========================================== */

/* Main TOC Container */
.prox-toc {
    margin: 2rem 0;
    border: 1px solid var(--prox-border, #e5e5e5);
    border-radius: 1rem;
    background: var(--prox-bg-elevated, #ffffff);
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    transition: all 0.2s ease;
}

.prox-toc:hover {
    border-color: var(--prox-border-strong, #cccccc);
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .prox-toc {
        background: #141414;
        border-color: #2a2a2a;
    }
    
    .prox-toc:hover {
        border-color: #3a3a3a;
    }
}

/* ==========================================
   TOC HEADER / SUMMARY
========================================== */

.prox-toc summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    font-family: var(--prox-font-sans, -apple-system, 'Inter', system-ui, sans-serif);
    font-size: 1.125rem;
    font-weight: 650;
    color: var(--prox-text, #111111);
    user-select: none;
    transition: background 0.2s ease;
    border-radius: 1rem 1rem 0 0;
}

/* Hide default arrow */
.prox-toc summary::-webkit-details-marker {
    display: none;
}

.prox-toc summary:hover {
    background: var(--prox-bg-subtle, #fafafa);
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    .prox-toc summary {
        color: #ededed;
    }
    .prox-toc summary:hover {
        background: #1c1c1c;
    }
}

/* ==========================================
   TOC TITLE WRAPPER
========================================== */

.prox-toc-title-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.prox-toc-icon {
    width: 22px;
    height: 22px;
    color: var(--prox-accent, #c41e3a);
    flex-shrink: 0;
}

.prox-toc-title {
    font-size: 1.125rem;
    font-weight: 650;
    letter-spacing: -0.01em;
}

/* ==========================================
   TOC TOGGLE ARROW
========================================== */

.prox-toc-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 999px;
    background: var(--prox-bg-muted, #f5f5f5);
    color: var(--prox-text-muted, #6b6b6b);
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.prox-toc summary:hover .prox-toc-toggle {
    background: var(--prox-accent-subtle, rgba(196, 30, 58, 0.1));
    color: var(--prox-accent, #c41e3a);
}

.prox-toc-toggle svg {
    width: 18px;
    height: 18px;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Rotate arrow when open */
.prox-toc[open] .prox-toc-toggle svg {
    transform: rotate(180deg);
}

/* Dark mode toggle */
@media (prefers-color-scheme: dark) {
    .prox-toc-toggle {
        background: #1c1c1c;
        color: #7a7a7a;
    }
    .prox-toc summary:hover .prox-toc-toggle {
        background: rgba(196, 30, 58, 0.15);
        color: #c41e3a;
    }
}

/* ==========================================
   TOC NAVIGATION
========================================== */

.prox-toc-nav {
    border-top: 1px solid var(--prox-border, #e5e5e5);
    padding: 1.25rem 1.5rem;
    max-height: 500px;
    overflow-y: auto;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    .prox-toc-nav {
        border-top-color: #2a2a2a;
    }
}

/* ==========================================
   TOC SCROLLBAR
========================================== */

.prox-toc-nav::-webkit-scrollbar {
    width: 4px;
}

.prox-toc-nav::-webkit-scrollbar-track {
    background: transparent;
}

.prox-toc-nav::-webkit-scrollbar-thumb {
    background: var(--prox-border-strong, #cccccc);
    border-radius: 999px;
}

.prox-toc-nav::-webkit-scrollbar-thumb:hover {
    background: var(--prox-text-muted, #6b6b6b);
}

/* ==========================================
   TOC LIST STYLES
========================================== */

.prox-toc-nav > ol {
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: toc-counter;
}

.prox-toc-nav > ol > li {
    list-style: none;
    counter-increment: toc-counter;
    position: relative;
    margin: 0;
    padding-left: 2.25rem;
}

.prox-toc-nav > ol > li::before {
    content: counter(toc-counter) ".";
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 1.75rem;
    text-align: right;
    color: var(--prox-accent, #c41e3a);
    font-weight: 700;
    font-size: 0.95rem;
    font-family: var(--prox-font-sans, -apple-system, 'Inter', system-ui, sans-serif);
    line-height: 1.45;
}

.prox-toc-nav > ol > li + li {
    margin-top: 0.75rem;
}

/* ==========================================
   H3 SUB-LIST
========================================== */

.prox-toc-nav ol ol {
    margin-top: 0.35rem;
    padding-left: 1.5rem;
    list-style: none;
}

.prox-toc-nav ol ol li {
    list-style: none;
    margin: 0;
    padding: 0;
}

.prox-toc-nav ol ol li + li {
    margin-top: 0.25rem;
}

/* ==========================================
   TOC LINKS
========================================== */

.prox-toc-nav a {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    color: var(--prox-text-light, #3a3a3a);
    text-decoration: none !important;
    border: none !important;
    line-height: 1.45;
    transition: all 0.2s ease;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: var(--prox-font-sans, -apple-system, 'Inter', system-ui, sans-serif);
}

/* ==========================================
   H2 LINKS
========================================== */

.prox-toc-nav > ol > li > a {
    font-weight: 600;
    color: var(--prox-text, #111111);
    padding-left: 0;
}

/* ==========================================
   H3 LINKS
========================================== */

.prox-toc-nav ol ol a {
    font-weight: 400;
    color: var(--prox-text-muted, #6b6b6b);
    font-size: 0.875rem;
    padding-left: 0.5rem;
}
.prox-toc-nav ol ol a::before {
    content: "";
    width: 16px;
    display: inline-block;
    flex-shrink: 0;
}
/* ==========================================
   DARK MODE LINKS
========================================== */

@media (prefers-color-scheme: dark) {
    .prox-toc-nav a {
        color: #b0b0b0;
    }
    
    .prox-toc-nav > ol > li > a {
        color: #ededed;
    }
    
    .prox-toc-nav ol ol a {
        color: #7a7a7a;
    }
    
    .prox-toc-nav ol ol a::before {
        color: #3a3a3a;
    }
}

/* ==========================================
   TOC LINK HOVER STATES
========================================== */

.prox-toc-nav a:hover {
    color: var(--prox-accent, #c41e3a);
    background: var(--prox-accent-subtle, rgba(196, 30, 58, 0.1));
    transform: translateX(4px);
}

/* ==========================================
   TOC ACTIVE STATE (Current Section)
========================================== */

.prox-toc-nav a.active {
    color: var(--prox-accent, #c41e3a);
    background: var(--prox-accent-subtle, rgba(196, 30, 58, 0.1));
}

/* ==========================================
   RESPONSIVE DESIGN
========================================== */

/* Tablets */
@media (max-width: 768px) {
    .prox-toc summary {
        padding: 1rem;
        font-size: 1rem;
    }
    
    .prox-toc-nav {
        padding: 1rem;
        max-height: 400px;
    }
    
    .prox-toc-nav a {
        font-size: 0.875rem;
        padding: 0.4rem 0.5rem;
    }
 
    .prox-toc-nav > ol > li {
        padding-left: 2rem;
    }

    .prox-toc-nav > ol    > li::before {
        width: 1.5rem;
        font-size: 0.875rem;
    }
 
    .prox-toc-nav > ol > li + li {
        margin-top: 0.5rem;
    }
    
    .prox-toc-nav ol ol {
        padding-left: 1rem;
    }
    
    .prox-toc-title {
        font-size: 1rem;
    }
    
    .prox-toc-toggle {
        width: 28px;
        height: 28px;
    }
    
    .prox-toc-toggle svg {
        width: 16px;
        height: 16px;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .prox-toc summary {
        padding: 0.75rem 1rem;
    }
    
    .prox-toc-nav {
        padding: 0.75rem 1rem;
        max-height: 300px;
    }
    
    .prox-toc-nav ol ol {
        padding-left: 0.75rem;
    }
    
    .prox-toc-nav ol ol a {
        font-size: 0.75rem;
    }
 
     .prox-toc-nav > ol > li {
        padding-left: 1.75rem;
    }

    .prox-toc-nav > ol > li::before {
        width: 1.25rem;
        font-size: 0.8125rem;
    }
 
    .prox-toc-nav > ol > li > a {
        font-size: 0.8125rem;
    }
    
    .prox-toc-icon {
        width: 18px;
        height: 18px;
    }
    
    .prox-toc-title {
        font-size: 0.875rem;
    }
}

/* ==========================================
   ACCESSIBILITY - Reduced Motion
========================================== */

@media (prefers-reduced-motion: reduce) {
    .prox-toc-toggle svg {
        transition: none;
    }
    
    .prox-toc-nav a {
        transition: none;
    }
    
    .prox-toc-nav a:hover {
        transform: none;
    }
}

/* ==========================================
   ACCESSIBILITY - Focus States
========================================== */

.prox-toc-nav a:focus-visible {
    outline: 2px solid var(--prox-accent, #c41e3a);
    outline-offset: 2px;
    border-radius: 0.5rem;
}

.prox-toc summary:focus-visible {
    outline: 2px solid var(--prox-accent, #c41e3a);
    outline-offset: -2px;
    border-radius: 1rem;
}

/* ==========================================
   PRINT STYLES
========================================== */

@media print {
    .prox-toc {
        border: 1px solid #ccc;
        box-shadow: none;
        break-inside: avoid;
    }
    
    .prox-toc-toggle {
        display: none;
    }
    
    .prox-toc-nav {
        max-height: none;
        overflow-y: visible;
    }
    
    .prox-toc-nav a {
        color: #000 !important;
        text-decoration: none !important;
    }
    
    .prox-toc-nav a:hover {
        transform: none !important;
        background: none !important;
    }
}
        /* --------------------------------------------
           18. RESPONSIVE (All Breakpoints)
        -------------------------------------------- */
        @media (max-width: 1024px) {
            .prox-article {
                font-size: var(--prox-text-base);
            }
            .prox-card {
                padding: var(--prox-space-5);
            }
        }

        @media (max-width: 768px) {
            .prox-container {
                padding: 0 1rem;
            }
            .prox-article h1 {
                margin-top: var(--prox-space-7);
            }
            .prox-article h2 {
                margin-top: var(--prox-space-8);
            }
            .prox-callout {
                padding: var(--prox-space-5);
            }
            .prox-card-grid {
                gap: var(--prox-space-4);
            }
        }

        @media (max-width: 480px) {
            .prox-article h1 {
                font-size: var(--prox-text-2xl);
            }
            .prox-article h2 {
                font-size: var(--prox-text-xl);
            }
            .prox-card-grid {
                grid-template-columns: 1fr;
            }
            .prox-table-wrapper {
                border-radius: var(--prox-radius-md);
            }
            .prox-step {
                padding: var(--prox-space-4);
            }
        }

        /* --------------------------------------------
           19. ACCESSIBILITY & PERFORMANCE
        -------------------------------------------- */
        .prox-article :focus-visible {
            outline: 2px solid var(--prox-accent);
            outline-offset: 2px;
            border-radius: var(--prox-radius-sm);
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
            .prox-card:hover {
                transform: none;
            }
            .prox-step:hover {
                transform: none;
            }
            .prox-image:hover {
                transform: none;
            }
        }

        .prox-article ::selection {
            background: var(--prox-accent-subtle);
            color: var(--prox-text);
        }

        @media print {
            .prox-container {
                margin: 0 auto;
                max-width: 680px;
            }
            .prox-card {
                break-inside: avoid;
                box-shadow: none;
                border: 1px solid #ccc;
            }
            .prox-table-wrapper {
                overflow: visible;
                border: 1px solid #ccc;
            }
            .prox-article a {
                text-decoration: none;
                color: #000;
            }
            .prox-step {
                break-inside: avoid;
                background: #f9f9f9;
                border: 1px solid #ccc;
            }
            .prox-step-number {
                background: #000;
                color: #fff;
            }
            .prox-image {
                box-shadow: none;
                border: 1px solid #ccc;
            }
            .prox-comparison {
                break-inside: avoid;
            }
            .prox-image-placeholder {
                border: 1px solid #ccc;
                background: #f9f9f9;
            }
        }
/* =====================================================
  Related article 
===================================================== */
 /* --- Category Shelf --- */
        .shelf-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 24px;
        }

        .shelf-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #111111;
        }

        .view-all {
            color: #4F46E5;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: transform 200ms ease;
        }

        .view-all:hover {
            transform: translateX(4px);
        }

        .carousel-wrapper {
            position: relative;
        }

        .carousel {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            scrollbar-width: none; /* Firefox */
            -ms-overflow-style: none; /* IE and Edge */
            scroll-padding-left: 32px;
            padding-bottom: 2rem; /* Spacing for drag */
        }

        .carousel::-webkit-scrollbar {
            display: none;
        }

        .carousel.dragging {
            cursor: grabbing;
            user-select: none;
        }


        /* --- Article Card --- */
        .card {
            flex: 0 0 auto;
            width: clamp(260px, 25vw, 340px);
            background: #FFFFFF;
            border-radius: 16px;
            border: 1px solid #E4E7EC;
            overflow: hidden;
            scroll-snap-align: start;
            transition: transform 250ms ease, box-shadow 250ms ease;
            display: flex;
            flex-direction: column;
            text-decoration: none;
        }

        .card:hover {
            transform: translateY(-6px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        .card-img-wrapper {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            flex-shrink: 0;
        }

        .card-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .card:hover .card-img-wrapper img {
            transform: scale(1.05);
        }

        .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .card-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            color: #111111;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 16px;
        }

        .card-link {
            margin-top: auto;
            color: #4F46E5;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: transform 200ms ease;
        }

        .card:hover .card-link {
            transform: translateX(4px);
        }

        /* --- Carousel Controls --- */
        .controls {
            display: flex;
            justify-content: center;
            gap: 5rem;
            margin: 32px;
        }

        .arrow-btn {
            width: 52px;
            height: 52px;
            border-radius: 999px;
            background: #FFFFFF;
            border: 1px solid #E4E7EC;
            box-shadow: 0 6px 16px rgba(0,0,0,0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #111111;
            transition: all 250ms ease;
        }

        .arrow-btn:hover:not(:disabled) {
            transform: translateY(-2px) scale(1.05);
            box-shadow: 0 10px 24px rgba(0,0,0,0.1);
            border-color: #4F46E5;
            color: #4F46E5;
        }

        .arrow-btn:active:not(:disabled) {
            transform: scale(0.98);
        }

        .arrow-btn:disabled {
            opacity: 0.4;
            cursor: not-allowed;
        }

      
/* =====================================================
   BLOG SKELETON UI PRE-FLIGHT (ZERO CLS SHIMMER)
===================================================== */
.blog-skeleton {
    pointer-events: none;
    position: relative;
    overflow: hidden;
    background: #FFFFFF !important;
}

.blog-skeleton::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(0, 0, 0, 0.03),
        transparent
    );
    transform: translateX(-100%);
    animation: blog-shimmer 1.5s infinite linear;
    z-index: 5;
}

@keyframes blog-shimmer {
    100% {
        transform: translateX(100%);
    }
}

.skeleton-media {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #E4E7EC;
}

.skeleton-line {
    background: #E4E7EC;
    border-radius: 6px;
}

.skeleton-line.title {
    width: 90%;
    height: 22px;
    margin-bottom: 12px;
}

.skeleton-line.link {
    width: 35%;
    height: 16px;
    margin-top: auto;
}