/* ==========================================================================
   Baseline layout + components. Tokens only — see tokens.css / DESIGN.md.
   ========================================================================== */

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

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

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-body);
    overflow-wrap: break-word;
}

a { color: var(--color-accent); text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; border-radius: var(--radius-sm); }
img { max-width: 100%; height: auto; display: block; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: var(--space-4); top: var(--space-4); background: var(--color-bg); padding: var(--space-2) var(--space-3); z-index: 10; }

.container { width: 100%; max-width: var(--width-wide); margin: 0 auto; padding: 0 var(--gutter); }
.container.narrow { max-width: calc(var(--width-narrow) + 2 * var(--gutter)); }
.muted { color: var(--color-muted); }

/* Header ------------------------------------------------------------------ */
.site-header { border-bottom: 1px solid var(--color-border); color: var(--color-text); }
.site-header-inner { display: flex; align-items: center; gap: var(--space-4); min-height: var(--header-height); flex-wrap: wrap; }
.site-header--overlay { position: absolute; top: 0; left: 0; right: 0; z-index: 3; border-bottom-color: transparent; }
.site-brand { display: inline-flex; align-items: center; color: var(--color-text); text-decoration: none; }
.site-nav { flex: 1; }
.site-nav ul { display: flex; gap: var(--space-4); list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
.site-nav a { color: var(--color-muted); text-decoration: none; font-size: var(--text-sm); transition: color var(--transition); }
.site-nav a:hover, .site-nav .nav-current a { color: var(--color-text); }
.site-actions { display: flex; align-items: center; gap: var(--space-2); }
.icon-btn { background: none; border: 1px solid transparent; color: var(--color-muted); padding: var(--space-2); border-radius: var(--radius-sm); cursor: pointer; line-height: 0; transition: color var(--transition), border-color var(--transition); }
.icon-btn:hover { color: var(--color-text); border-color: var(--color-border); }
.btn-small { background: var(--color-accent); color: var(--color-accent-contrast); padding: var(--space-1) var(--space-3); border-radius: var(--radius-sm); font-size: var(--text-sm); font-weight: 600; text-decoration: none; }

/* Signature logo ---------------------------------------------------------- */
.signature { display: block; width: auto; color: var(--color-text); }
.signature--header { height: var(--logo-header-height); }
.signature--hero { width: var(--logo-hero-width); height: auto; filter: var(--logo-glow); }

.eyebrow { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: var(--tracking-eyebrow); color: var(--color-accent); margin: 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* Home hero --------------------------------------------------------------- */
.home-hero { position: relative; display: flex; align-items: flex-end; min-height: var(--hero-min-height); background: var(--color-bg); color: var(--color-text); overflow: hidden; isolation: isolate; margin-bottom: var(--space-7); }
.home-hero.no-cover { min-height: auto; padding-top: calc(var(--header-height) + var(--space-7)); }
.home-hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 74% center; z-index: -2; }
.home-hero::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
    background: linear-gradient(to top, rgba(var(--hero-shade), 1) 0%, rgba(var(--hero-shade), 0.85) 35%, rgba(var(--hero-shade), 0.15) 70%, rgba(var(--hero-shade), 0.45) 100%); }
.home-hero-content { display: flex; flex-direction: column; gap: var(--space-2); padding-top: calc(var(--header-height) + var(--space-6)); padding-bottom: var(--space-7); }
.home-hero-title { margin: 0; line-height: 1; }
.home-hero-lead { font-size: var(--text-lg); color: var(--color-text); margin: var(--space-3) 0 0; max-width: 34ch; }
.home-hero-tagline { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-accent); margin: 0; }

@media (min-width: 800px) {
    .home-hero { align-items: center; }
    .home-hero-image { object-position: center; }
    .home-hero::after { background:
        linear-gradient(to right, rgba(var(--hero-shade), 0.95) 0%, rgba(var(--hero-shade), 0.8) 28%, rgba(var(--hero-shade), 0) 60%),
        linear-gradient(to top, rgba(var(--hero-shade), 1) 0%, rgba(var(--hero-shade), 0) 22%); }
    .home-hero-content { padding-bottom: var(--space-6); }
}

/* Archive / feed ---------------------------------------------------------- */
.archive-header { padding: var(--space-7) var(--gutter) var(--space-5); }
.home-title { font-family: var(--font-heading); font-size: var(--text-3xl); line-height: var(--leading-tight); margin: 0 0 var(--space-2); }
.home-description { color: var(--color-muted); font-size: var(--text-lg); margin: 0; max-width: 60ch; }

.post-feed { display: grid; align-items: start; gap: var(--space-5); grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); padding-bottom: var(--space-7); }

.post-card { display: flex; flex-direction: column; border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; background: var(--color-surface); transition: border-color var(--transition); }
.post-card:hover, .post-card:focus-within { border-color: var(--color-glow); }
.post-card-image img { aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }
.post-card-body { padding: var(--space-4) var(--space-5) var(--space-5); display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.post-card.no-image .post-card-body { border-top: 3px solid var(--color-accent); }
.post-card-title { font-family: var(--font-heading); font-size: var(--text-lg); line-height: var(--leading-tight); margin: 0; }
.post-card-title a { color: var(--color-text); text-decoration: none; }
.post-card-title a:hover { color: var(--color-accent); }
.post-card-excerpt { color: var(--color-muted); font-size: var(--text-sm); margin: 0; }
.post-card .post-meta { margin-top: auto; font-family: var(--font-mono); font-size: var(--text-xs); }

.post-kicker { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: var(--tracking-eyebrow); color: var(--color-accent); text-decoration: none; }
.post-meta { color: var(--color-muted); font-size: var(--text-sm); margin: 0; }
.post-meta a { color: inherit; }

/* Post -------------------------------------------------------------------- */
.post-header { padding-top: var(--space-7); padding-bottom: var(--space-5); }
.post-title { font-family: var(--font-heading); font-size: var(--text-3xl); line-height: var(--leading-tight); margin: var(--space-2) 0 var(--space-3); }
.post-excerpt { font-size: var(--text-lg); color: var(--color-muted); margin: 0 0 var(--space-3); }
.post-image { margin: 0 auto var(--space-6); }
.post-image img { width: 100%; border-radius: var(--radius-md); }
.post-image figcaption { color: var(--color-muted); font-size: var(--text-sm); text-align: center; padding-top: var(--space-2); }

.gh-content > * + * { margin-top: var(--space-5); margin-bottom: 0; }
.gh-content h2, .gh-content h3 { font-family: var(--font-heading); }
.gh-content h2 { font-size: var(--text-2xl); line-height: var(--leading-tight); margin-top: var(--space-7); }
.gh-content h3 { font-size: var(--text-xl); line-height: var(--leading-tight); margin-top: var(--space-6); }
.gh-content blockquote { border-left: 3px solid var(--color-accent); margin-left: 0; padding-left: var(--space-4); color: var(--color-muted); }
.gh-content hr { border: 0; border-top: 1px solid var(--color-border); }
.gh-content table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); display: block; overflow-x: auto; }
.gh-content th, .gh-content td { border-bottom: 1px solid var(--color-border); padding: var(--space-2) var(--space-3); text-align: left; }
.gh-content th { font-weight: 600; }

.post-footer { padding-top: var(--space-6); }
.tag-list { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.tag-list a { border: 1px solid var(--color-border); font-family: var(--font-mono); font-size: var(--text-sm); background: var(--color-surface); color: var(--color-text); padding: var(--space-1) var(--space-3); border-radius: var(--radius-sm); text-decoration: none; }

.post-nav { display: grid; gap: var(--space-4); grid-template-columns: 1fr; padding-top: var(--space-6); padding-bottom: var(--space-7); }
@media (min-width: 640px) { .post-nav { grid-template-columns: 1fr 1fr; } .post-nav .next { text-align: right; grid-column: 2; } }
.post-nav-link { display: block; border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); color: var(--color-text); text-decoration: none; }
.post-nav-link span { display: block; color: var(--color-muted); font-size: var(--text-sm); }

/* Koenig cards (required by Ghost) --------------------------------------- */
.kg-width-wide { position: relative; width: min(var(--width-wide), 100vw - 2 * var(--gutter)); left: 50%; transform: translateX(-50%); }
.kg-width-full { position: relative; width: 100vw; left: 50%; transform: translateX(-50%); }
.kg-width-full img { border-radius: 0; }
.kg-image-card img, .kg-gallery-image img { margin: 0 auto; }
.kg-card figcaption { color: var(--color-muted); font-size: var(--text-sm); text-align: center; padding-top: var(--space-2); }

/* Pagination / footer / misc --------------------------------------------- */
.pagination { display: flex; justify-content: space-between; align-items: center; padding-bottom: var(--space-7); color: var(--color-muted); font-size: var(--text-sm); }
.site-footer { border-top: 1px solid var(--color-border); padding: var(--space-6) 0; font-size: var(--text-sm); }
.site-footer-inner { display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: space-between; }
.site-footer ul { display: flex; gap: var(--space-4); list-style: none; margin: 0; padding: 0; }
.site-footer p { margin: 0; }
.error { padding: var(--space-8) var(--gutter); }

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

/* Comments ---------------------------------------------------------------- */
/* Ghost renders comments in an iframe. If the iframe's color-scheme differs
   from the page's, browsers paint it with an opaque white background.
   Matching it to the embedded document keeps it transparent. */
.post-comments { padding-top: var(--space-6); padding-bottom: var(--space-7); }
.post-comments iframe { color-scheme: light; background: transparent; }