/* =========================================================================
   analog — Ghost theme
   Color & layout tokens ported from the landing-page project.
   Fonts: Google DM Sans / DM Mono (theme decision, replaces GT America).
   Light only. No gradients, no heavy shadows.
   ========================================================================= */

:root {
    /* Neutral scale (from landing project) */
    --neutral-50:  #FAFAFA; --neutral-100: #F5F5F5; --neutral-200: #E5E5E5; --neutral-300: #D4D4D4;
    --neutral-400: #A3A3A3; --neutral-500: #737373; --neutral-700: #404040; --neutral-800: #1F1F1F;
    --neutral-850: #171717; --neutral-900: #121212; --neutral-1000: #000000;
    --blue-400: #4D8EFF; --blue-500: #1E6FEB; --blue-600: #1868CE;
    --blue: #003CEB; /* brand base blue */

    /* Semantic */
    --background: #FFFFFF;
    --foreground: var(--neutral-900);
    --muted: var(--neutral-100);
    --muted-foreground: var(--neutral-500);
    --border: var(--neutral-200);
    /* Accent maps onto Ghost's native accent colour, falling back to the landing token */
    --accent: var(--ghost-accent-color, var(--neutral-900));
    --accent-hover: var(--neutral-1000);

    /* Fonts — DM Sans / DM Mono, overridable via Ghost's native custom-fonts (Brand settings) */
    --font-sans: var(--gh-font-body, "DM Sans", ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif);
    --font-heading: var(--gh-font-heading, "DM Sans", ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif);
    --font-mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    /* Type scale (from landing project) */
    --body-lg:    400 18px/29px var(--font-sans);
    --body-base:  400 16px/26px var(--font-sans);
    --body-sm:    400 14px/21px var(--font-sans);
    --label-md:   500 14px/20px var(--font-sans);
    --label-sm:   500 12px/16px var(--font-sans);
    --meta-caps:  400 12px/17px var(--font-sans);
    --meta-caps-tracking: 0.04em;
    --mono-sm:    400 14px/21px var(--font-mono);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
    font: var(--body-base);
    color: var(--foreground);
    background: var(--background);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
h1, h2, h3, h4, h5, h6, p { color: var(--foreground); margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
::selection { background: var(--blue); color: #fff; }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* ---------- Utilities ---------- */
.gutter {
    padding-left: max(96px, calc((100% - 1440px) / 2));
    padding-right: max(96px, calc((100% - 1440px) / 2));
}
@media (max-width: 960px) { .gutter { padding-left: 48px; padding-right: 48px; } }
@media (max-width: 640px) { .gutter { padding-left: 24px; padding-right: 24px; } }

.mono { font: var(--mono-sm); }
.meta {
    font: var(--meta-caps);
    letter-spacing: var(--meta-caps-tracking);
    text-transform: uppercase;
    color: var(--muted-foreground);
}
.arrow { display: inline-block; transition: transform 160ms ease-out; }
.empty { color: var(--muted-foreground); }

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--accent);
    color: #fff;
    padding: 12px 20px;
    z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- Header ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: var(--background);
    border-bottom: 1px solid var(--border);
}
.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    gap: 24px;
}
.site-brand {
    font: var(--mono-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--foreground);
}
.site-logo { max-height: 28px; width: auto; }

.site-nav .nav {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 24px;
    align-items: center;
}
.site-nav .nav li a {
    font: var(--label-md);
    color: var(--foreground);
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
    transition: border-color 120ms ease-out;
}
.site-nav .nav li a:hover { border-bottom-color: var(--foreground); }

/* Burger — hidden by default; enabled on mobile only when JS is present */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 0;
    margin: 0;
    background: none;
    border: 0;
    cursor: pointer;
}
.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--foreground);
    transition: transform 160ms ease-out, opacity 160ms ease-out;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 640px) {
    /* Progressive enhancement: without JS the nav is simply visible (stacked). */
    html.js .nav-toggle { display: inline-flex; }
    html.js .site-nav { display: none; width: 100%; }
    html.js .nav-toggle[aria-expanded="true"] ~ .site-nav { display: block; }
    .site-header-inner { flex-wrap: wrap; padding-top: 16px; padding-bottom: 16px; min-height: 0; }
    .site-nav .nav { flex-direction: column; align-items: flex-start; gap: 16px; padding: 16px 0 8px; }
}

/* ---------- Hero ---------- */
.hero {
    padding-top: 96px;
    padding-bottom: 128px;
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: flex-start;
}
.hero-text {
    margin: 48px 0 0;
    font: 500 clamp(40px, 6vw, 88px) / 1.05 var(--font-sans);
    letter-spacing: -0.045em;
    text-wrap: balance;
    max-width: 18ch;
}
.hero-cta {
    font: 500 16px/1 var(--font-sans);
    color: var(--accent);
    border-bottom: 1px solid var(--accent);
    padding-bottom: 4px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.hero-cta:hover .arrow { transform: translateX(4px); }
@media (max-width: 640px) {
    .hero { padding-top: 48px; padding-bottom: 64px; gap: 32px; }
    .hero-text { margin-top: 24px; max-width: none; }
}

/* ---------- Offerings ---------- */
/* Bento grid of light tiles on a darker-grey block; the heading shares that block. */
.offerings { background: var(--border); }
.offerings-head {
    background: var(--border);
    padding-top: 96px;
    padding-bottom: 0;
}
.offerings-head h2 {
    font: 500 clamp(32px, 4vw, 56px) / 1.05 var(--font-heading);
    letter-spacing: -0.045em;
}
.offerings-inner {
    counter-reset: offering;
    padding-top: 96px;
    padding-bottom: 96px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}
.offerings-head + .offerings-inner { padding-top: 48px; }
.offering-card {
    counter-increment: offering;
    background: var(--muted);
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.offering-index { color: var(--muted-foreground); font-weight: 500; letter-spacing: 0.04em; }
.offering-index::before { content: counter(offering, decimal-leading-zero); }
.offering-title {
    font: 500 clamp(22px, 2.4vw, 30px) / 1.15 var(--font-sans);
    letter-spacing: -0.02em;
}
.offering-body { font: var(--body-lg); color: var(--neutral-700); text-wrap: pretty; }
.offering-body p { margin: 0 0 12px; }

/* Blue variant: blue block, white text, inner blocks at 10% white */
.offerings--blue,
.offerings--blue .offerings-head,
.offerings--blue .offerings-inner { background: var(--blue); }
.offerings--blue .offerings-inner { border-color: var(--blue); }
.offerings--blue .offering-card { background: rgba(255, 255, 255, 0.10); }
.offerings--blue .offerings-head h2,
.offerings--blue .offering-title { color: #fff; }
.offerings--blue .offering-index { color: rgba(255, 255, 255, 0.70); }
.offerings--blue .offering-body { color: rgba(255, 255, 255, 0.90); }
@media (max-width: 760px) {
    .offerings-head { padding-top: 64px; }
    .offerings-inner { grid-template-columns: 1fr; padding-top: 64px; padding-bottom: 64px; }
    .offerings-head + .offerings-inner { padding-top: 32px; }
    .offering-card { padding: 32px 24px; }
}

/* ---------- Tagline ---------- */
.tagline { padding-top: 96px; padding-bottom: 96px; }
.tagline-text {
    font: 500 clamp(28px, 4vw, 48px) / 1.1 var(--font-sans);
    letter-spacing: -0.03em;
    max-width: 24ch;
    text-wrap: balance;
}
@media (max-width: 640px) { .tagline { padding-top: 64px; padding-bottom: 64px; } }

/* ---------- Section head ---------- */
.section-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}
.section-head h1, .section-head h2 {
    font: 500 clamp(32px, 4vw, 56px) / 1.05 var(--font-sans);
    letter-spacing: -0.045em;
}
.show-all {
    font: var(--label-md);
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
}
.show-all:hover { border-bottom-color: var(--accent); }
.show-all:hover .arrow { transform: translateX(4px); }

/* ---------- Post list / cards ---------- */
.writing, .archive { padding-top: 96px; padding-bottom: 96px; }
@media (max-width: 640px) { .writing, .archive { padding-top: 64px; padding-bottom: 64px; } }

/* Homepage writing background (configurable). Light grey is lighter than the offerings block. */
.writing--grey { background: var(--muted); }
.writing--white { background: var(--background); }

.post-list { border-top: 1px solid var(--border); }
.post-card { border-bottom: 1px solid var(--border); }
.post-card-link {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 24px;
    align-items: baseline;
    padding: 28px 0;
}
.post-card-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.post-card-title {
    font: 500 clamp(20px, 2vw, 28px) / 1.2 var(--font-sans);
    letter-spacing: -0.02em;
    transition: color 120ms ease-out;
}
.post-card-link:hover .post-card-title { color: var(--muted-foreground); }
@media (max-width: 640px) {
    .post-card-link { grid-template-columns: 1fr; gap: 10px; padding: 24px 0; }
}

/* ---------- Post / page content ---------- */
.post, .page {
    /* Override the wide site gutter for reading width.
       max-width 800 minus 2x24 padding ≈ 752px ≈ ~73 characters/line
       (optimal measure is 50-75 cpl, WCAG max 80). */
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    padding-top: 64px;
    padding-bottom: 96px;
    padding-left: 24px;
    padding-right: 24px;
}
.post-header, .page-header { margin-bottom: 40px; }
.post-meta { display: flex; gap: 16px; align-items: center; margin-bottom: 24px; }
.post-meta .post-tag { color: var(--accent); }
.post-title, .page-title {
    font: 500 clamp(32px, 5vw, 60px) / 1.05 var(--font-sans);
    letter-spacing: -0.045em;
    text-wrap: balance;
}
.post-excerpt, .page-lede {
    font: var(--body-lg);
    color: var(--neutral-700);
    margin-top: 20px;
}
.post-image, .page-image { margin: 0 0 40px; }
.post-image figcaption { font: var(--body-sm); color: var(--muted-foreground); margin-top: 12px; }

/* Koenig / prose content */
.gh-content > * { margin: 0 0 1.5em; }
.gh-content { font: var(--body-lg); color: var(--foreground); }
.gh-content p { text-wrap: pretty; }
.gh-content h2 { font: 500 clamp(24px, 3vw, 36px)/1.15 var(--font-sans); letter-spacing: -0.03em; margin-top: 1.6em; }
.gh-content h3 { font: 500 22px/1.25 var(--font-sans); letter-spacing: -0.02em; margin-top: 1.4em; }
.gh-content a { color: var(--accent); border-bottom: 1px solid var(--border); transition: border-color 120ms ease-out; }
.gh-content a:hover { border-bottom-color: var(--accent); }
.gh-content ul, .gh-content ol { padding-left: 1.2em; }
.gh-content li { margin-bottom: 0.5em; }
.gh-content blockquote {
    border-left: 2px solid var(--accent);
    padding-left: 24px;
    margin-left: 0;
    font: 500 clamp(20px, 2.4vw, 26px)/1.4 var(--font-sans);
    letter-spacing: -0.01em;
}
.gh-content :not(pre) > code {
    font: var(--mono-sm);
    background: var(--muted);
    padding: 2px 6px;
    border-radius: 0;
}
.gh-content pre {
    font: var(--mono-sm);
    background: var(--neutral-900);
    color: var(--neutral-50);
    padding: 24px;
    overflow-x: auto;
}
.gh-content hr { border: 0; border-top: 1px solid var(--border); }
.gh-content figcaption { font: var(--body-sm); color: var(--muted-foreground); text-align: center; margin-top: 12px; }

/* Tools page: GitHub links read as a clean list */
.tools-content h2, .tools-content h3 { margin-top: 1.8em; }

/* ---------- Related ---------- */
.related {
    padding-top: 64px;
    padding-bottom: 96px;
    border-top: 1px solid var(--border);
}

/* ---------- Pagination ---------- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-top: 48px;
    font: var(--label-md);
}
.pagination a { border-bottom: 1px solid transparent; padding-bottom: 2px; }
.pagination a:hover { border-bottom-color: var(--foreground); }
.pagination .page-number { color: var(--muted-foreground); }

/* ---------- Archive head ---------- */
.archive-head { flex-direction: column; align-items: flex-start; }
.archive-description { font: var(--body-lg); color: var(--neutral-700); max-width: 60ch; margin-top: 12px; }

/* ---------- Error ---------- */
.error {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 24px;
    padding-top: 96px;
    padding-bottom: 96px;
}
.error-code { color: var(--muted-foreground); }
.error-title { font: 500 clamp(32px, 5vw, 64px)/1.05 var(--font-sans); letter-spacing: -0.045em; }
.error-home {
    color: var(--accent);
    border-bottom: 1px solid var(--accent);
    padding-bottom: 4px;
    display: inline-flex;
    gap: 8px;
    align-items: center;
}
.error-home:hover .arrow { transform: translateX(4px); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); margin-top: 0; }
.footer-recommendations { padding-top: 64px; }
.site-footer-inner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    padding-top: 48px;
    padding-bottom: 24px;
}
.footer-nav .nav {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}
.footer-nav .nav li a {
    font: var(--label-md);
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
    transition: border-color 120ms ease-out;
}
.footer-nav .nav li a:hover { border-bottom-color: var(--foreground); }
.footer-contacts { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-contacts a {
    font: var(--label-md);
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
    transition: border-color 120ms ease-out;
}
.footer-contacts a:hover { border-bottom-color: var(--foreground); }
.footer-credit {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding-top: 24px;
    padding-bottom: 48px;
    color: var(--muted-foreground);
}
.footer-credit .mono { font: var(--mono-sm); text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted-foreground); }
.footer-credit a { border-bottom: 1px solid transparent; }
.footer-credit a:hover { border-bottom-color: var(--muted-foreground); }

@media (max-width: 640px) {
    .site-footer-inner, .footer-credit { flex-direction: column; }
}

/* ---------- Koenig image width breakouts (required by Ghost) ---------- */
.gh-content .kg-width-wide {
    width: min(1040px, 92vw);
    margin-left: calc(50% - min(520px, 46vw));
    max-width: none;
}
.gh-content .kg-width-full {
    width: 100vw;
    margin-left: calc(50% - 50vw);
    max-width: none;
}
.gh-content .kg-width-full img { width: 100%; }

/* ---------- Headings use the heading font (overridable via Ghost custom fonts) ---------- */
h1, h2, h3, h4, h5, h6,
.hero-text, .tagline-text, .section-head h1, .section-head h2,
.offering-title, .post-card-title, .post-title, .page-title,
.error-title, .gh-content h2, .gh-content h3, .gh-content blockquote {
    font-family: var(--font-heading);
}

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