/* Pinova Lab Blog — shared stylesheet (same design tokens as index.html) */
:root {
  --ink: #1f2d3d; --ink-soft: #4a5a6a; --ground: #f6f8f9; --surface: #ffffff;
  --line: #dde4e8; --mint: #6dd5d5; --mint-ink: #1d7f80; --mint-tint: #eafbfb;
  --slate-a: #3a4a5a; --slate-b: #1f2d3d; --on-slate: #eef5f6; --on-slate-soft: #b9c9cf;
  --focus: #1d7f80;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #e6eef1; --ink-soft: #a6b6bd; --ground: #131b22; --surface: #1b252e;
    --line: #2b3843; --mint-ink: #6dd5d5; --mint-tint: #16292a;
    --slate-a: #26333f; --slate-b: #0f161c; --focus: #6dd5d5;
  }
}
:root[data-theme="dark"] {
  --ink: #e6eef1; --ink-soft: #a6b6bd; --ground: #131b22; --surface: #1b252e;
  --line: #2b3843; --mint-ink: #6dd5d5; --mint-tint: #16292a;
  --slate-a: #26333f; --slate-b: #0f161c; --focus: #6dd5d5;
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--ground); color: var(--ink);
  font: 400 1rem/1.65 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}
h1, h2, h3 { font-family: 'Poppins', system-ui, sans-serif; line-height: 1.25; text-wrap: balance; margin: 0; }
p { margin: 0; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--mint-ink); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); color: var(--ink); padding: 8px 14px; z-index: 20; }
.skip:focus { left: 16px; }

.wrap { width: 100%; max-width: 1160px; margin-inline: auto; padding-inline: 20px; }
.wrap-narrow { width: 100%; max-width: 760px; margin-inline: auto; padding-inline: 20px; }

/* Logo / brand */
.brand { display: inline-flex; align-items: center; gap: .5em; color: inherit; text-decoration: none; line-height: 1; }
.brand svg { height: 1.9em; width: auto; flex: none; }
.brand span { font-family: 'Poppins', sans-serif; font-weight: 500; font-size: .62em; letter-spacing: .2em; margin-right: -.2em; white-space: nowrap; }
.brand span span { font-size: 1em; margin-right: 0; }
.brand .lab { color: var(--mint); }

/* Header */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
  background: color-mix(in srgb, var(--slate-b) 92%, transparent);
  backdrop-filter: blur(10px); color: var(--on-slate);
  border-bottom: 1px solid rgba(109,213,213,.18);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.site-header .brand { font-size: 22px; color: var(--mint); }
.site-header .brand span { color: var(--on-slate); }
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a { color: var(--on-slate); text-decoration: none; font-weight: 500; padding: 10px 12px; border-radius: 6px; font-size: .95rem; }
.nav a:hover, .nav a[aria-current="page"] { background: rgba(109,213,213,.12); }
.nav .nav-cta { background: var(--mint); color: #12303a; }
.nav .nav-cta:hover { background: #8be0e0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 26px; border-radius: 8px;
  font: 600 1rem/1 'Poppins', sans-serif; text-decoration: none; cursor: pointer;
  border: 2px solid transparent; transition: background .2s, transform .2s;
}
.btn-mint { background: var(--mint); color: #12303a; }
.btn-mint:hover { background: #8be0e0; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { background: var(--surface); }

/* Breadcrumb */
.breadcrumb { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 18px 0 0; margin: 0; font-size: .85rem; color: var(--ink-soft); }
.breadcrumb li::after { content: "/"; margin-left: 6px; color: var(--ink-soft); }
.breadcrumb li:last-child::after { content: ""; }
.breadcrumb a { color: var(--ink-soft); text-decoration: none; }
.breadcrumb a:hover { color: var(--mint-ink); text-decoration: underline; }
.breadcrumb li:last-child { color: var(--ink); font-weight: 500; }

/* Blog index hero */
.blog-hero { padding-block: 30px 8px; }
.blog-hero .eyebrow { font-size: .8rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--mint-ink); margin-bottom: 12px; }
.blog-hero h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); margin-bottom: 14px; }
.blog-hero .lede { color: var(--ink-soft); max-width: 60ch; font-size: 1.06rem; }

/* Post cards (blog index + related) */
.post-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; padding-block: 32px 64px; }
.post-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; display: flex; flex-direction: column; text-decoration: none; color: inherit; transition: transform .15s, box-shadow .15s; }
.post-card:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(0,0,0,.1); }
.post-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.post-card-body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.post-card .eyebrow { font-size: .72rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--mint-ink); }
.post-card h2, .post-card h3 { font-size: 1.15rem; }
.post-card p { color: var(--ink-soft); font-size: .93rem; }
.post-card .read-more { margin-top: auto; padding-top: 10px; font: 600 .9rem 'Poppins', sans-serif; color: var(--mint-ink); }

/* Article layout */
.article-header { padding-block: 22px 10px; }
.article-header .eyebrow { font-size: .8rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--mint-ink); margin-bottom: 12px; }
.article-header h1 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); margin-bottom: 14px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 16px; color: var(--ink-soft); font-size: .88rem; margin-bottom: 4px; }
.article-figure { margin: 20px 0 8px; }
.article-figure img { border-radius: 14px; box-shadow: 0 20px 40px rgba(0,0,0,.16); width: 100%; }
.article-figure figcaption { margin-top: 10px; font-size: .82rem; color: var(--ink-soft); }

.article-body { max-width: 720px; padding-block: 12px 8px; }
.article-body > * + * { margin-top: 1.1em; }
.article-body h2 { font-size: clamp(1.25rem, 2.4vw, 1.55rem); margin-top: 2em; }
.article-body h3 { font-size: 1.1rem; margin-top: 1.6em; }
.article-body p, .article-body li { color: var(--ink); }
.article-body ul, .article-body ol { padding-left: 1.3em; display: grid; gap: .5em; }
.article-body strong { color: var(--ink); }
.article-body a { font-weight: 500; }

.callout { background: var(--mint-tint); border: 1px solid var(--mint-ink); border-radius: 14px; padding: 22px 24px; }
.callout p + p { margin-top: .6em; }
.callout-label { display: block; font: 600 .78rem 'Poppins', sans-serif; letter-spacing: .08em; text-transform: uppercase; color: var(--mint-ink); margin-bottom: 8px; }

.table-wrap { overflow-x: auto; }
.article-body table { width: 100%; min-width: 480px; border-collapse: collapse; font-size: .92rem; }
.article-body th, .article-body td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.article-body th { color: var(--ink-soft); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; background: var(--surface); }
.article-body tbody tr:nth-child(odd) { background: color-mix(in srgb, var(--surface) 60%, transparent); }

.article-faq { display: grid; gap: 10px; margin-top: 1.4em; }
.article-faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.article-faq summary { cursor: pointer; list-style: none; padding: 16px 48px 16px 18px; font-weight: 600; position: relative; min-height: 48px; font-family: 'Poppins', sans-serif; font-size: .98rem; }
.article-faq summary::-webkit-details-marker { display: none; }
.article-faq summary::after { content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); font: 500 1.4rem 'Poppins', sans-serif; color: var(--mint-ink); }
.article-faq details[open] summary::after { content: "–"; }
.article-faq details p { padding: 0 18px 18px; color: var(--ink-soft); margin: 0; }

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 1.6em; }
.tag { font: 500 .8rem 'Poppins', sans-serif; color: var(--ink-soft); background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px; }

.article-cta { background: linear-gradient(135deg, var(--slate-a), var(--slate-b)); color: var(--on-slate); border-radius: 16px; padding: 32px 30px; margin-top: 2.4em; display: grid; gap: 14px; }
.article-cta h2 { color: #fff; font-size: 1.35rem; margin: 0; }
.article-cta p { color: var(--on-slate-soft); margin: 0; }
.article-cta .btn-row { display: flex; gap: 12px; flex-wrap: wrap; }

.related-heading { padding-top: 56px; }
.related-heading h2 { font-size: 1.5rem; margin-bottom: 6px; }
.related-heading p { color: var(--ink-soft); }

footer { padding-block: 40px; color: var(--ink-soft); font-size: .9rem; border-top: 1px solid var(--line); margin-top: 24px; }
footer .wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center; }
footer .brand { font-size: 20px; color: var(--ink); }
footer .brand svg { color: var(--mint-ink); }
footer nav { display: flex; gap: 16px; flex-wrap: wrap; }
footer nav a { color: var(--ink-soft); text-decoration: none; }
footer nav a:hover { color: var(--mint-ink); }

@media (max-width: 640px) {
  .nav a:not(.nav-cta) { display: none; }
  .article-cta { padding: 26px 22px; }
}

@media print {
  body { background: #fff; color: #000; }
  .site-header, .breadcrumb, .related-heading, .post-grid, footer, .skip { display: none; }
  .wrap-narrow { max-width: 100%; padding-inline: 0; }
  .article-figure img { max-height: 320px; width: auto; margin-inline: auto; }
  .article-cta { background: none; color: #000; border: 1px solid #999; }
  .article-cta h2, .article-cta p { color: #000; }
  .article-cta .btn-row { display: none; }
  .callout { border: 1px solid #999; background: #f4f4f4; }
  .article-body a { color: #000; text-decoration: underline; }
  .article-faq details { border: 1px solid #ccc; break-inside: avoid; }
  .article-faq details p { display: block !important; }
  .article-faq summary::after { display: none; }
  h2, h3 { break-after: avoid; }
  p, li { orphans: 3; widows: 3; }
}