:root {
    --bg-primary: #0e0e0e;
    --bg-secondary: #181818;
    --bg-card: #1e1e1e;
    --bg-card-hover: #252525;
    --accent: #FFBA00;
    --accent-soft: rgba(255, 186, 0, 0.12);
    --accent-hover: #e6a800;
    --text-primary: #f0ece4;
    --text-secondary: #a8a49c;
    --text-muted: #6b6860;
    --border: rgba(255, 186, 0, 0.08);
    --border-hover: rgba(255, 186, 0, 0.2);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Poppins', sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
    --article-width: 780px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    font-weight: 300;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-hover);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== HEADER / NAV ===== */
.blog-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(14, 14, 14, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.blog-header .container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.blog-logo img {
    height: 36px;
    width: auto;
}

.blog-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.blog-nav a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    transition: color var(--transition);
    position: relative;
}

.blog-nav a:hover,
.blog-nav a.active {
    color: var(--text-primary);
}

.blog-nav a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.blog-nav .btn-cta {
    background: var(--accent);
    color: #0e0e0e;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.8125rem;
    letter-spacing: 0.02em;
    transition: all var(--transition);
}

.blog-nav .btn-cta:hover {
    background: var(--accent-hover);
    color: #0e0e0e;
    transform: translateY(-1px);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    margin: 5px 0;
    transition: all var(--transition);
    border-radius: 2px;
}

/* ===== HERO BLOG INDEX ===== */
.blog-hero {
    padding: 140px 2rem 60px;
    text-align: center;
    position: relative;
}

.blog-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.blog-hero .label {
    display: inline-block;
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.blog-hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 600;
    line-height: 1.15;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.blog-hero p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 560px;
    margin: 0 auto;
}

/* ===== ARTICLE GRID ===== */
.blog-grid-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 4rem 2rem;
}

.blog-grid-section h2 {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
}

/* ===== ARTICLE CARD ===== */
.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
}

.article-card .card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
}

.article-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.article-card .card-image .tag {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(14, 14, 14, 0.8);
    backdrop-filter: blur(10px);
    color: var(--accent);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.3rem 0.75rem;
    border-radius: 50px;
    border: 1px solid rgba(255, 186, 0, 0.15);
}

.article-card .card-body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-card .card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.article-card .card-meta .dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--text-muted);
}

.article-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    transition: color var(--transition);
}

.article-card:hover h3 {
    color: var(--accent);
}

.article-card .card-excerpt {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    flex: 1;
    margin-bottom: 1.25rem;
}

.article-card .read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: gap var(--transition);
}

.article-card:hover .read-more {
    gap: 0.75rem;
}

.read-more svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition);
}

.article-card:hover .read-more svg {
    transform: translateX(2px);
}

/* ===== ARTICLE PAGE ===== */
.article-hero {
    padding: 120px 2rem 3rem;
    text-align: center;
    max-width: var(--article-width);
    margin: 0 auto;
}

.article-hero .breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.article-hero .breadcrumb a {
    color: var(--text-muted);
}

.article-hero .breadcrumb a:hover {
    color: var(--accent);
}

.article-hero .breadcrumb .sep {
    font-size: 0.625rem;
}

.article-hero .article-tag {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.35rem 1rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
}

.article-hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1.25rem;
}

.article-hero .article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.article-hero .article-meta img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-hover);
}

.article-hero .article-meta .author-name {
    color: var(--text-primary);
    font-weight: 400;
}

.article-cover {
    max-width: 960px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.article-cover img {
    width: 100%;
    border-radius: var(--radius-lg);
    aspect-ratio: 21 / 9;
    object-fit: cover;
}

/* ===== ARTICLE CONTENT ===== */
.article-content {
    max-width: var(--article-width);
    margin: 0 auto;
    padding: 2rem 2rem 4rem;
}

.article-content h2 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem;
    color: var(--text-primary);
    position: relative;
    padding-left: 1rem;
    border-left: 3px solid var(--accent);
}

.article-content h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 500;
    margin: 2rem 0 0.75rem;
    color: var(--text-primary);
}

.article-content p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.0625rem;
    line-height: 1.8;
}

.article-content strong {
    color: var(--text-primary);
    font-weight: 500;
}

.article-content ul,
.article-content ol {
    margin: 1rem 0 1.5rem 1.5rem;
    color: var(--text-secondary);
}

.article-content li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
    font-size: 1.0625rem;
}

.article-content li::marker {
    color: var(--accent);
}

.article-content blockquote {
    border-left: 3px solid var(--accent);
    background: var(--accent-soft);
    padding: 1.25rem 1.5rem;
    margin: 2rem 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--text-primary);
}

.article-content img {
    border-radius: var(--radius-md);
    margin: 2rem 0;
    width: 100%;
}

.article-content figcaption {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: -1.25rem;
    margin-bottom: 2rem;
}

.article-content a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-color: rgba(255, 186, 0, 0.3);
    text-underline-offset: 3px;
    transition: text-decoration-color var(--transition);
}

.article-content a:hover {
    text-decoration-color: var(--accent);
}

/* Callout box */
.callout {
    background: var(--bg-card);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
}

.callout .callout-title {
    font-weight: 500;
    color: var(--accent);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.callout p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Table of contents */
.toc {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
}

.toc .toc-title {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

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

.toc li {
    counter-increment: toc;
    margin-bottom: 0.5rem;
    font-size: 0.9375rem;
}

.toc li::before {
    content: counter(toc, decimal-leading-zero) ".";
    color: var(--accent);
    font-weight: 500;
    margin-right: 0.75rem;
    font-size: 0.8125rem;
}

.toc a {
    color: var(--text-secondary);
    text-decoration: none;
}

.toc a:hover {
    color: var(--text-primary);
}

/* ===== CTA BANNER ===== */
.cta-banner {
    background: var(--bg-card);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-lg);
    padding: 3rem;
    text-align: center;
    margin: 3rem 0;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.cta-banner h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.cta-banner p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.cta-banner .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent);
    color: #0e0e0e;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
}

.cta-banner .btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    color: #0e0e0e;
}

/* ===== RELATED ARTICLES ===== */
.related-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 3rem 2rem 4rem;
    border-top: 1px solid var(--border);
}

.related-section h2 {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* ===== FOOTER ===== */
.blog-footer {
    border-top: 1px solid var(--border);
    padding: 3rem 2rem;
    text-align: center;
}

.blog-footer .container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.blog-footer .footer-brand img {
    height: 32px;
    margin: 0 auto 1rem;
}

.blog-footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.blog-footer .footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.blog-footer .footer-links a {
    color: var(--text-secondary);
    font-size: 0.8125rem;
}

.blog-footer .footer-links a:hover {
    color: var(--text-primary);
}

.blog-footer .footer-social {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.blog-footer .footer-social a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: all var(--transition);
}

.blog-footer .footer-social a:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
}

.blog-footer .copyright {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== SHARE BUTTONS (article) ===== */
.share-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    margin: 2rem 0;
}

.share-bar .share-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.share-bar a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    transition: all var(--transition);
}

.share-bar a:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
}

/* ===== BACK TO TOP ===== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 50;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--accent);
    color: #0e0e0e;
    border-color: var(--accent);
    transform: translateY(-3px);
}

/* ===== READING PROGRESS ===== */
.reading-progress {
    position: fixed;
    top: 72px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--accent);
    z-index: 101;
    transition: width 0.1s linear;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .blog-nav {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(14, 14, 14, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1.5rem 2rem 2rem;
        gap: 1.25rem;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        opacity: 0;
        transition: all var(--transition);
    }

    .blog-nav.open {
        transform: translateY(0);
        opacity: 1;
    }

    .menu-toggle {
        display: block;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

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

    .cta-banner {
        padding: 2rem 1.5rem;
    }

    .article-hero h1 {
        font-size: 1.75rem;
    }

    .article-content h2 {
        font-size: 1.35rem;
    }

    .share-bar {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .blog-header .container {
        padding: 0 1rem;
    }

    .blog-hero {
        padding: 120px 1rem 40px;
    }

    .blog-grid-section {
        padding: 2rem 1rem;
    }

    .article-content {
        padding: 1.5rem 1rem 3rem;
    }
}