/* ============================================
   ES Designs Blog — standalone article styling
   Loaded ONLY by /blog/ pages (not the SPA).
   Pairs with css/variables.css for brand tokens.
   Carries its own minimal reset (reset.css is
   not loaded on blog pages).
   Target: WCAG 2.2 AA — landmarks, heading order,
   4.5:1 contrast, visible focus, reduced motion.
   ============================================ */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body.blog-shell {
    margin: 0;
    background: var(--color-white);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.7;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

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

/* --- Skip link --- */
.blog-skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 100;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-sm) var(--space-md);
    border-radius: 0 0 var(--radius-md) 0;
    text-decoration: none;
    font-weight: 600;
}
.blog-skip-link:focus {
    left: 0;
}

/* --- Visible focus everywhere --- */
.blog-shell a:focus-visible,
.blog-shell button:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* --- Header --- */
.blog-header {
    border-bottom: 1px solid var(--color-border);
    background: var(--color-white);
}
.blog-header-inner {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}
.blog-brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
    text-decoration: none;
    white-space: nowrap;
}
.blog-brand:hover { color: var(--color-primary-hover); }
.blog-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    align-items: center;
}
.blog-nav a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
}
.blog-nav a:hover { color: var(--color-accent); text-decoration: underline; }
.blog-nav a.blog-nav-cta {
    color: var(--color-accent);
    font-weight: 600;
}

/* --- Main wrapper --- */
.blog-main {
    display: block;
}

/* --- Breadcrumb --- */
.blog-breadcrumb {
    max-width: 68ch;
    margin: var(--space-xl) auto 0;
    padding: 0 var(--space-lg);
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}
.blog-breadcrumb ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}
.blog-breadcrumb li::after {
    content: "/";
    margin-left: var(--space-xs);
    color: var(--color-border);
}
.blog-breadcrumb li:last-child::after { content: ""; }
.blog-breadcrumb a { color: var(--color-accent); text-decoration: none; }
.blog-breadcrumb a:hover { text-decoration: underline; }
.blog-breadcrumb li[aria-current] { color: var(--color-text-muted); }

/* --- Article --- */
.blog-article {
    max-width: 68ch;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg) var(--space-4xl);
}
.blog-article h1 {
    font-family: var(--font-display);
    font-size: clamp(1.875rem, 5vw, 2.75rem);
    line-height: 1.2;
    color: var(--color-primary);
    margin: var(--space-md) 0 var(--space-md);
    letter-spacing: -0.01em;
}
.blog-byline {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    margin: 0 0 var(--space-2xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}
.blog-byline strong { color: var(--color-text); }

.blog-article h2 {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 3.5vw, 1.875rem);
    line-height: 1.25;
    color: var(--color-primary);
    margin: var(--space-3xl) 0 var(--space-md);
}
.blog-article h3 {
    font-family: var(--font-display);
    font-size: clamp(1.15rem, 2.5vw, 1.375rem);
    line-height: 1.3;
    color: var(--color-primary);
    margin: var(--space-2xl) 0 var(--space-sm);
}
.blog-article h4 {
    font-family: var(--font-display);
    font-size: 1.0625rem;
    color: var(--color-text);
    margin: var(--space-xl) 0 var(--space-sm);
}
.blog-article p { margin: 0 0 var(--space-lg); }
.blog-article a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.blog-article a:hover { color: var(--color-accent-hover); }
.blog-article strong { font-weight: 700; color: var(--color-text); }
.blog-article ul,
.blog-article ol {
    margin: 0 0 var(--space-lg);
    padding-left: var(--space-xl);
}
.blog-article li { margin-bottom: var(--space-sm); }
.blog-article li > ul,
.blog-article li > ol { margin: var(--space-sm) 0 0; }

.blog-article blockquote {
    margin: var(--space-xl) 0;
    padding: var(--space-md) var(--space-lg);
    border-left: 4px solid var(--color-accent);
    background: var(--color-surface);
    color: var(--color-text);
    font-style: italic;
}
.blog-article blockquote p:last-child { margin-bottom: 0; }

.blog-article code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.1em 0.35em;
}
.blog-article pre {
    margin: var(--space-xl) 0;
    padding: var(--space-lg);
    background: #0f1b2a;
    color: #e8eef5;
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-size: 0.9375rem;
    line-height: 1.6;
}
.blog-article pre code {
    background: none;
    border: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

.blog-article hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--space-3xl) 0;
}

.blog-article figure { margin: var(--space-xl) 0; }
.blog-article figcaption {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    margin-top: var(--space-sm);
    text-align: center;
}

.blog-article table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-xl) 0;
    font-size: 1rem;
}
.blog-article th,
.blog-article td {
    border: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    vertical-align: top;
}
.blog-article th {
    background: var(--color-surface);
    color: var(--color-primary);
    font-weight: 700;
}

/* --- In-article CTA --- */
.blog-cta {
    max-width: 68ch;
    margin: var(--space-2xl) auto;
    padding: var(--space-xl) var(--space-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}
.blog-cta h2 {
    font-family: var(--font-display);
    color: var(--color-primary);
    font-size: 1.375rem;
    margin: 0 0 var(--space-sm);
}
.blog-cta p {
    margin: 0 0 var(--space-lg);
    color: var(--color-text);
}
.blog-btn {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-white);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}
.blog-btn:hover { background: var(--color-accent-hover); }

/* --- Newsletter --- */
.blog-newsletter {
    max-width: 68ch;
    margin: var(--space-2xl) auto;
    padding: var(--space-xl) var(--space-lg);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
}
.blog-newsletter h2 {
    font-family: var(--font-display);
    color: var(--color-primary);
    font-size: 1.375rem;
    margin: 0 0 var(--space-sm);
}
.blog-newsletter p {
    margin: 0 0 var(--space-md);
    color: var(--color-text-muted);
}
.blog-newsletter a { color: var(--color-accent); }
.blog-newsletter-embed { margin-top: var(--space-md); }

/* --- Index listing --- */
.blog-index-header {
    max-width: 68ch;
    margin: var(--space-4xl) auto var(--space-2xl);
    padding: 0 var(--space-lg);
}
.blog-index-header h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--color-primary);
    margin: 0 0 var(--space-md);
}
.blog-index-header p {
    color: var(--color-text-muted);
    font-size: 1.125rem;
    margin: 0;
}
.blog-list {
    max-width: 68ch;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    list-style: none;
}
.blog-card {
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-border);
}
.blog-card:last-child { border-bottom: none; }
.blog-card h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    line-height: 1.3;
    margin: 0 0 var(--space-xs);
}
.blog-card h2 a {
    color: var(--color-primary);
    text-decoration: none;
}
.blog-card h2 a:hover { color: var(--color-accent); text-decoration: underline; }
.blog-card-date {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    margin: 0 0 var(--space-sm);
}
.blog-card-excerpt {
    margin: 0 0 var(--space-sm);
    color: var(--color-text);
}
.blog-card-more {
    color: var(--color-accent);
    font-weight: 600;
    text-decoration: none;
}
.blog-card-more:hover { text-decoration: underline; }

/* --- Footer --- */
.blog-footer {
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
    margin-top: var(--space-4xl);
}
.blog-footer-inner {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
}
.blog-footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
}
.blog-footer-links a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.9375rem;
}
.blog-footer-links a:hover { color: var(--color-accent); text-decoration: underline; }
.blog-footer-copy {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin: 0;
}

/* --- Responsive --- */
@media (max-width: 640px) {
    body.blog-shell { font-size: 1.0625rem; }
    .blog-header-inner { flex-direction: column; align-items: flex-start; }
    .blog-nav { gap: var(--space-md); }
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
    .blog-shell * {
        transition: none !important;
        animation: none !important;
        scroll-behavior: auto !important;
    }
}