/* The Kostrix blog (www.kostrix.com/blog/), served by the application
   (internal/web/blog.go). The palette, type and header/footer are the
   marketing site's (website/app/globals.css, components/site-header.tsx,
   site-footer.tsx) written out as plain CSS, so the blog reads as a section
   of the site rather than as a page of the application. Keep the tokens in
   step with globals.css when the site's change.

   Theme: an explicit .dark / .light class on <html> (blog.js, from the
   kostrix_theme cookie the site's toggle writes) wins; without one the
   operating system decides.

   Fonts (V3, 15 Oct 2026): the very files the site's next/font build
   serves - IBM Plex Sans as one variable font (wght 100-700), Serif 600
   and Mono 400, each in a latin and a latin-ext subset with the same
   unicode ranges - embedded in the application (blogsite/fonts) and
   served at /blog/fonts/. The application's own static Plex files are
   the fontsource builds, which set the same CSS several pixels narrower
   in Chrome (the header's links sat 3-12px left of the site's, and "Start
   free trial" was 8px narrower), so the header jumped between the site
   and the blog. Each url() written with the "@font" prefix is replaced
   with that font's content-versioned /blog/fonts/ URL when the stylesheet
   is built. */

@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:100 700;font-stretch:100%;font-display:swap;src:url("/blog/fonts/ibm-plex-sans-latin.056e4e2459f57a00.woff2") format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:100 700;font-stretch:100%;font-display:swap;src:url("/blog/fonts/ibm-plex-sans-latin-ext.ae1d854fefa1167a.woff2") format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C4,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'IBM Plex Serif';font-style:normal;font-weight:600;font-display:swap;src:url("/blog/fonts/ibm-plex-serif-600-latin.d8bf89a58f34027c.woff2") format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Serif';font-style:normal;font-weight:600;font-display:swap;src:url("/blog/fonts/ibm-plex-serif-600-latin-ext.af27611d0c9c0298.woff2") format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C4,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url("/blog/fonts/ibm-plex-mono-400-latin.c36f509c0a8f9f85.woff2") format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url("/blog/fonts/ibm-plex-mono-400-latin-ext.f1050dc5317b4343.woff2") format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C4,U+2113,U+2C60-2C7F,U+A720-A7FF}

:root{
  color-scheme:light;
  --paper:#ffffff; --paper-2:#f4f6f8; --surface:#ffffff; --surface-2:#f5f7f9;
  --ink:#0b1114; --wordmark:#000000; --ink-2:#384147; --ink-3:#4d565d;
  --rule:#dfe3e7; --rule-2:#bec6cd;
  --primary:#0e4a51; --primary-2:#0a373d; --on-primary:#f7f5f0;
  --accent:#8f530d; --accent-soft:#f3e6d0;
  --positive:#2b6440; --positive-soft:#e0ebe1;
  --focus:#0e4a51;
  --code-bg:#f2f4f6;
  --shadow:0 1px 2px rgb(18 23 26 / .06), 0 10px 28px -14px rgb(18 23 26 / .2);
  --sans:'IBM Plex Sans', ui-sans-serif, system-ui, sans-serif;
  --serif:'IBM Plex Serif', ui-serif, Georgia, serif;
  --mono:'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}
@media (prefers-color-scheme: dark){
  :root:not(.light){
    color-scheme:dark;
    --paper:#0e1113; --paper-2:#121618; --surface:#171c1f; --surface-2:#1e2529;
    --ink:#e9e6df; --wordmark:#ffffff; --ink-2:#a7afb5; --ink-3:#98a1a8;
    --rule:#262d32; --rule-2:#3b444b;
    --primary:#74c2c6; --primary-2:#a6dcdf; --on-primary:#06262a;
    --accent:#d9a25a; --accent-soft:#322619;
    --positive:#82c08f; --positive-soft:#16271b;
    --focus:#74c2c6; --code-bg:#151a1d;
    --shadow:0 1px 2px rgb(0 0 0 / .4), 0 10px 30px -14px rgb(0 0 0 / .7);
  }
}
:root.dark{
  color-scheme:dark;
  --paper:#0e1113; --paper-2:#121618; --surface:#171c1f; --surface-2:#1e2529;
  --ink:#e9e6df; --wordmark:#ffffff; --ink-2:#a7afb5; --ink-3:#98a1a8;
  --rule:#262d32; --rule-2:#3b444b;
  --primary:#74c2c6; --primary-2:#a6dcdf; --on-primary:#06262a;
  --accent:#d9a25a; --accent-soft:#322619;
  --positive:#82c08f; --positive-soft:#16271b;
  --focus:#74c2c6; --code-bg:#151a1d;
  --shadow:0 1px 2px rgb(0 0 0 / .4), 0 10px 30px -14px rgb(0 0 0 / .7);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms !important}}
body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.5;font-feature-settings:"cv05" 1;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
main{flex:1}
img,svg{display:block;max-width:100%}
a{color:inherit}
h1,h2,h3{font-family:var(--serif);font-weight:600;letter-spacing:-.015em;text-wrap:balance;margin:0}
p{text-wrap:pretty}
::selection{background:var(--primary);color:var(--on-primary)}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:2px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:-9999px;top:12px;z-index:50;background:var(--primary);color:var(--on-primary);padding:8px 12px;border-radius:4px;font-size:14px;text-decoration:none}
.skip:focus{left:12px}
.wrap{width:100%;max-width:72rem;margin:0 auto;padding:0 20px}
@media (min-width:640px){.wrap{padding:0 32px}}
.label{font-family:var(--mono);font-size:.75rem;line-height:1.45;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);margin:0}

/* ------------------------------------------------------------ buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:8px 14px;border-radius:4px;font-size:.875rem;font-weight:500;line-height:1.25rem;text-decoration:none;white-space:nowrap;transition:background-color .15s,color .15s,border-color .15s}
@media (min-width:640px){.btn{min-height:0}}
.btn-primary{background:var(--primary);color:var(--on-primary);border:0}
.btn-primary:hover{background:var(--primary-2)}
.btn-ghost{border:1px solid var(--rule-2);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--surface-2)}
.btn-lg{padding:10px 16px;min-height:44px}
@media (min-width:640px){.btn-lg{min-height:0}}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;flex-shrink:0;border:1px solid var(--rule);border-radius:4px;background:transparent;color:var(--ink-2);cursor:pointer;padding:0}
.icon-btn:hover{border-color:var(--rule-2);color:var(--ink)}
.icon-btn svg{width:16px;height:16px}
@media (min-width:640px){.icon-btn{width:36px;height:36px}}

/* ------------------------------------------------------------ header */
.site-header{position:sticky;top:0;z-index:40;border-bottom:1px solid var(--rule);background:color-mix(in srgb, var(--paper) 85%, transparent);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}
.bar{display:flex;align-items:center;gap:12px;height:64px;padding:0 16px}
@media (min-width:640px){.bar{gap:24px;padding:0 32px}}
.brand{display:inline-flex;align-items:center;min-height:44px;flex-shrink:0;text-decoration:none;border-radius:4px}
.wordmark{display:inline-flex;align-items:center;gap:12px}
.wordmark .mark{height:32px;width:auto;flex-shrink:0}
.wm{display:flex;flex-direction:column;line-height:1}
.wm-name{font-family:var(--serif);font-size:1.3125rem;font-weight:600;letter-spacing:-.025em;color:var(--wordmark)}
.wm-beta{margin-top:3px;font-family:var(--mono);font-size:.6875rem;font-weight:500;text-transform:uppercase;letter-spacing:.18em;color:var(--ink-3)}
.nav{display:none}
.nav ul{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav a{position:relative;display:inline-flex;align-items:center;height:36px;padding:0 12px;border-radius:4px;font-size:.9375rem;color:var(--ink-2);text-decoration:none;transition:color .15s}
.nav a:hover{color:var(--ink)}
.nav a[aria-current="page"]{color:var(--ink);font-weight:500}
.nav a[aria-current="page"]::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:1px;background:var(--primary)}
@media (min-width:1024px){.nav{display:block}}
.actions{margin-left:auto;display:flex;align-items:center;gap:6px}
@media (min-width:640px){.actions{gap:8px}}
.actions .btn{min-height:44px;padding:0 10px;font-size:.8125rem}
@media (min-width:640px){.actions .btn{min-height:0;padding:8px 14px;font-size:.875rem;line-height:1.25rem}}
.hide-sm{display:none !important}
@media (min-width:640px){.hide-sm{display:inline-flex !important}}
/* The theme button needs blog.js; without it, it would do nothing. */
html:not([data-theme-choice]) .theme-toggle{display:none}
@media (max-width:379px){.theme-toggle{display:none}}
.theme-toggle .ico-screen,.theme-toggle .ico-half{display:none}
html[data-theme-choice="system"] .theme-toggle .ico-screen{display:block}
html[data-theme-choice="system"] .theme-toggle .ico-sun{display:none}
html[data-theme-choice="dark"] .theme-toggle .ico-half{display:inline}
.menu{position:static}
.menu summary{list-style:none}
.menu summary::-webkit-details-marker{display:none}
.menu .ico-close{display:none}
.menu[open] .ico-close{display:block}
.menu[open] .ico-open{display:none}
.menu-panel{position:absolute;left:0;right:0;top:64px;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);background:var(--surface);padding:8px 20px;box-shadow:var(--shadow)}
.menu-panel ul{list-style:none;margin:0 auto;padding:0;max-width:72rem}
.menu-panel li+li{border-top:1px solid var(--rule)}
.menu-panel a{display:block;padding:12px 0;font-size:.875rem;color:var(--ink-2);text-decoration:none}
.menu-panel a[aria-current="page"],.menu-panel a.strong{color:var(--ink);font-weight:500}
@media (min-width:640px){.menu-panel{padding:8px 32px}}
@media (min-width:1024px){.menu{display:none}}

/* ------------------------------------------------------------ page head */
.page-head{border-bottom:1px solid var(--rule)}
.page-head .wrap{padding-top:40px;padding-bottom:40px}
@media (min-width:640px){.page-head .wrap{padding-top:64px;padding-bottom:56px}}
.page-head h1{max-width:48rem;font-size:2rem;line-height:1.1;letter-spacing:-.025em}
@media (min-width:640px){.page-head h1{font-size:2.75rem}}
.lede{max-width:42rem;margin:20px 0 0;font-size:1.0625rem;line-height:1.65;color:var(--ink-2)}
.section{padding-top:40px;padding-bottom:56px}
@media (min-width:640px){.section{padding-top:56px;padding-bottom:80px}}
.section-title{font-size:1.5rem;margin-bottom:20px}
.crumbs ol{display:flex;flex-wrap:wrap;gap:4px 0;list-style:none;margin:0 0 16px;padding:0;font-family:var(--mono);font-size:.75rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3)}
.crumbs li+li::before{content:"/";margin:0 8px;color:var(--rule-2)}
.crumbs a{color:var(--ink-3);text-decoration:none}
.crumbs a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px}

/* ------------------------------------------------------------ tags */
.tags{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:16px 0 0;padding:0}
.tags a{display:inline-flex;align-items:center;min-height:28px;padding:2px 10px;border:1px solid var(--rule);border-radius:999px;background:var(--surface);font-size:.8125rem;color:var(--ink-2);text-decoration:none;transition:border-color .15s,color .15s}
.tags a:hover{border-color:var(--primary);color:var(--ink)}
.tags-filter{margin-top:28px;gap:8px}
.tags-filter a{min-height:36px;padding:4px 14px}
.tags-filter a[aria-current="page"]{background:var(--primary);border-color:var(--primary);color:var(--on-primary)}

/* ------------------------------------------------------------ cards */
.card{position:relative;display:flex;flex-direction:column;border:1px solid var(--rule);border-radius:4px;background:var(--surface);padding:20px;transition:border-color .15s,box-shadow .15s}
.card:hover{border-color:var(--rule-2);box-shadow:var(--shadow)}
.card .meta{display:flex;flex-wrap:wrap;align-items:center;gap:0 4px;margin:0;font-family:var(--mono);font-size:.75rem;letter-spacing:.04em;color:var(--ink-3)}
.card h2,.card h3{margin-top:10px;font-size:1.25rem;line-height:1.25}
.card h2 a,.card h3 a{text-decoration:none}
.card h2 a::after,.card h3 a::after{content:"";position:absolute;inset:0}
.card h2 a:hover,.card h3 a:hover{color:var(--primary)}
.card .desc{margin:10px 0 0;font-size:.9375rem;line-height:1.6;color:var(--ink-2)}
.card .tags{margin-top:auto;padding-top:16px}
.card .tags a{position:relative;z-index:1}
.card-lead{padding:24px;background:var(--paper-2);border-color:var(--rule)}
@media (min-width:640px){.card-lead{padding:36px 40px}}
.card-lead h2{font-size:1.625rem;line-height:1.2;max-width:44rem}
@media (min-width:640px){.card-lead h2{font-size:2rem}}
.card-lead .desc{font-size:1.0625rem;max-width:44rem}
.card-lead .tags{margin-top:20px;padding-top:0}
.card-lead .more{margin:20px 0 0;font-size:.9375rem;font-weight:500;color:var(--primary)}
.card-lead .more a{text-decoration:none}
.badge{display:inline-flex;align-items:center;margin-right:8px;padding:1px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-family:var(--mono);font-size:.6875rem;letter-spacing:.08em;text-transform:uppercase}
.grid{display:grid;gap:16px;margin-top:16px}
@media (min-width:768px){.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:20px}}
@media (min-width:1024px){.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.empty{color:var(--ink-2)}

/* ------------------------------------------------------------ article */
.col{max-width:46rem;margin:0 auto;padding:0 20px}
@media (min-width:640px){.col{padding:0 32px;max-width:49rem}}
.article-head{border-bottom:1px solid var(--rule);background:var(--paper-2)}
.article-head .col{padding-top:32px;padding-bottom:32px}
@media (min-width:640px){.article-head .col{padding-top:56px;padding-bottom:44px}}
.article-head h1{font-size:2rem;line-height:1.12;letter-spacing:-.025em}
@media (min-width:640px){.article-head h1{font-size:2.625rem}}
.article-head .lede{font-size:1.125rem}
.byline{display:flex;flex-wrap:wrap;gap:2px 6px;margin:24px 0 0;font-size:.875rem;color:var(--ink-3)}
.byline .author{color:var(--ink);font-weight:500}
.article .wrap .col,.wrap>.col{padding:0}

.prose{padding-top:32px;padding-bottom:8px;font-size:1.0625rem;line-height:1.75;color:var(--ink)}
@media (min-width:640px){.prose{padding-top:48px;font-size:1.125rem}}
.prose>*:first-child{margin-top:0}
.prose p,.prose ul,.prose ol,.prose blockquote,.prose pre,.prose table{margin:0 0 1.25em}
.prose h2{margin:2em 0 .6em;font-size:1.5rem;line-height:1.25}
@media (min-width:640px){.prose h2{font-size:1.75rem}}
.prose h3{margin:1.6em 0 .5em;font-size:1.25rem;line-height:1.3}
.prose h4{margin:1.4em 0 .4em;font-family:var(--sans);font-size:1.0625rem;font-weight:600}
.prose h2,.prose h3,.prose h4{scroll-margin-top:80px}
.prose a{color:var(--primary);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.prose a:hover{text-decoration-thickness:2px}
.prose strong{font-weight:600}
.prose ul,.prose ol{padding-left:1.4em}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--ink-3)}
.prose hr{border:0;border-top:1px solid var(--rule);margin:2.5em 0}
.prose blockquote{margin-left:0;padding:4px 0 4px 20px;border-left:3px solid var(--primary);color:var(--ink-2)}
.prose blockquote p:last-child{margin-bottom:0}
.prose code{font-family:var(--mono);font-size:.875em;background:var(--code-bg);border:1px solid var(--rule);border-radius:3px;padding:.1em .35em}
.prose pre{overflow-x:auto;background:var(--code-bg);border:1px solid var(--rule);border-radius:4px;padding:16px 18px;font-size:.875rem;line-height:1.6}
.prose pre code{background:none;border:0;padding:0;font-size:inherit}
.prose table{display:table;width:100%;border-collapse:collapse;font-size:.9375rem;line-height:1.5;font-variant-numeric:tabular-nums}
/* On a phone a wide table scrolls inside itself rather than widening the page. */
@media (max-width:639px){.prose table{display:block;overflow-x:auto}}
.prose th,.prose td{padding:10px 14px;border-bottom:1px solid var(--rule);text-align:left;vertical-align:top}
.prose thead th{font-family:var(--mono);font-size:.75rem;font-weight:400;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);border-bottom:1px solid var(--rule-2);white-space:nowrap}
.prose tbody tr:nth-child(even){background:var(--paper-2)}
.prose img{height:auto;border:1px solid var(--rule);border-radius:4px}
.tags-foot{margin:24px 0 0;padding-top:24px;border-top:1px solid var(--rule)}

/* ------------------------------------------------------------ CTA */
.cta{display:grid;gap:20px;margin:48px 0 0;padding:28px 24px;border:1px solid var(--rule);border-left:3px solid var(--primary);border-radius:4px;background:var(--paper-2);box-shadow:var(--shadow)}
@media (min-width:640px){.cta{padding:36px 40px;margin-top:56px}}
.cta h2{font-size:1.375rem;line-height:1.25;max-width:40rem}
@media (min-width:640px){.cta h2{font-size:1.625rem}}
.cta p{margin:12px 0 0;max-width:40rem;font-size:1rem;line-height:1.6;color:var(--ink-2)}
.cta-actions{display:flex;flex-wrap:wrap;gap:10px;margin:0}
.page-head .cta-actions{margin-top:28px}
.cta .cta-actions{margin:0}

/* ------------------------------------------------------------ related */
.related{margin-top:64px;border-top:1px solid var(--rule);background:var(--paper-2)}
.related .wrap{padding-top:48px;padding-bottom:56px}
@media (min-width:640px){.related .wrap{padding-top:64px;padding-bottom:72px}}
.related h2{font-size:1.5rem}
@media (min-width:640px){.related h2{font-size:1.75rem}}
.all{margin:24px 0 0;font-size:.9375rem;font-weight:500}
.all a{color:var(--primary);text-decoration:none}
.all a:hover{text-decoration:underline;text-underline-offset:3px}

/* ------------------------------------------------------------ footer */
.site-footer{border-top:1px solid var(--rule);background:var(--paper-2);margin-top:auto}
main+.site-footer{margin-top:0}
.foot{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;padding-top:48px;padding-bottom:96px}
@media (min-width:640px){.foot{gap:32px 24px}}
@media (min-width:768px){.foot{grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:40px}}
.foot-brand{grid-column:span 2}
@media (min-width:768px){.foot-brand{grid-column:span 1}}
.foot-brand p{margin:12px 0 0;max-width:20rem;font-size:.875rem;line-height:1.625;color:var(--ink-2)}
.foot-brand p+p{margin-top:8px;line-height:1.25rem}
@media (min-width:640px){.foot-brand p+p{margin-top:12px}}
.foot .tall{grid-row:span 2}
@media (min-width:768px){.foot .tall{grid-row:auto}}
.foot ul{list-style:none;margin:8px 0 0;padding:0}
@media (min-width:640px){.foot ul{margin-top:12px}}
.foot nav a{display:flex;align-items:center;min-height:44px;border-radius:4px;font-size:.875rem;line-height:1.25rem;color:var(--ink-2);text-decoration:none;transition:color .15s}
.foot nav a:hover{color:var(--ink)}
@media (min-width:640px){.foot nav a{display:inline-block;min-height:0;padding:6px 0}.foot li+li{margin-top:4px}}
a.ul{display:inline-flex;align-items:center;min-height:44px;border-radius:4px;text-decoration:underline;text-decoration-color:var(--rule-2);text-underline-offset:4px}
a.ul:hover{text-decoration-color:var(--primary)}
@media (min-width:640px){a.ul{display:inline-block;min-height:0;padding:6px 0}}