/* =========================================================
   FOCUZ — Blog & Article stylesheet
   Shared by blog.html and blog/*.html
   Brand tokens mirror the main site (index.html).
   Palette: Orioles Orange / Black / Sonic Silver / White / Outer Space
   Type: Roboto Mono (body/UI) · Inter (display) · Pixelify Sans (titles)
   ========================================================= */
:root{
  --bg:           #e4e4e4;
  --surface:      #ffffff;
  --surface-2:    #d4d4d4;
  --text:         #1b1b1b;
  --text-2:       #636363;
  --text-3:       #9e9e9e;
  --border:       #9e9e9e;
  --border-soft:  #d4d4d4;
  --accent:       #FF481E;
  --accent-2:     #E03A14;
  --glass:        rgba(246,246,246,.82);
  --glass-strong: rgba(255,255,255,.74);
  --glass-hover:  rgba(0,0,0,.06);
  --scrim:        rgba(255,255,255,.55);

  --pad-x: 75px;
  --tick: 10px;
  --r: 0px;
  --r-md: 6px;

  --f: "Roboto Mono", ui-monospace, monospace;
  --f-display: "Inter", system-ui, -apple-system, sans-serif;
  --f-pixel: "Pixelify Sans", ui-monospace, monospace;

  color-scheme: light;
}
[data-theme="dark"]{
  --bg:           #000000;
  --surface:      #15171A;
  --surface-2:    #484D53;
  --text:         #FFFFFF;
  --text-2:       #6C747C;
  --text-3:       #484D53;
  --border:       #6C747C;
  --border-soft:  #2A2D32;
  --accent:       #FF481E;
  --accent-2:     #E03A14;
  --glass:        rgba(0,0,0,.85);
  --glass-strong: rgba(0,0,0,.62);
  --glass-hover:  rgba(255,255,255,.07);
  --scrim:        rgba(0,0,0,.5);
  color-scheme: dark;
}

/* ============ RESET ============ */
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--bg)}
body{
  font-family:var(--f);
  background:var(--bg);
  color:var(--text);
  font-size:18px;font-weight:400;line-height:1.5;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{border:0;background:none;cursor:pointer;color:inherit;font:inherit}
input{font:inherit;color:inherit}
::selection{background:var(--accent);color:var(--bg)}

/* ============ UTILITIES ============ */
.container{max-width:1770px;margin:0 auto;padding:0 var(--pad-x);position:relative}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--f);font-weight:500;font-size:14px;line-height:1;
  letter-spacing:.04em;text-transform:uppercase;color:var(--text-2);
}
.eyebrow::before{content:"";width:10px;height:10px;background:var(--accent);display:block;flex:0 0 auto}
.h3-eyebrow{font-family:var(--f);font-weight:600;font-size:34px;line-height:1.15;letter-spacing:-.01em;margin:8px 0 0;color:var(--text)}
.body-sm{font-family:var(--f);font-weight:400;font-size:15px;line-height:1.55;color:var(--text-2)}
.body-md{font-family:var(--f);font-weight:400;font-size:18px;line-height:1.55;color:var(--text)}
.mono{font-family:var(--f);font-weight:500;font-size:13px;line-height:1.2;letter-spacing:.06em;text-transform:uppercase;color:var(--text-2)}
.section-title{font-family:var(--f-pixel);font-weight:700;font-size:84px;line-height:.95;letter-spacing:-.03em;text-transform:uppercase;margin:0;color:var(--text)}

/* Corner ticks */
.tick-frame{position:relative}
.tick-frame::before,.tick-frame::after,
.tick-frame > .tick-tl,.tick-frame > .tick-tr{
  content:"";position:absolute;width:var(--tick);height:var(--tick);
  background:var(--accent);pointer-events:none;
}
.tick-frame::before{top:0;left:0}
.tick-frame::after{bottom:0;right:0}
.tick-frame > .tick-tl{top:0;right:0}
.tick-frame > .tick-tr{bottom:0;left:0}

/* Buttons */
.btn{
  position:relative;display:inline-flex;align-items:center;gap:14px;
  height:56px;padding:0 24px;background:var(--accent);color:var(--bg);
  border-radius:var(--r);font-family:var(--f);font-weight:600;font-size:16px;
  letter-spacing:.02em;text-transform:uppercase;overflow:hidden;isolation:isolate;
  transition:background .2s ease,color .2s ease;
}
.btn::after{content:"";position:absolute;inset:0;background:var(--text);transform:translateX(-101%);transition:transform .25s ease;z-index:-1}
.btn:hover{color:var(--bg)}
.btn:hover::after{transform:translateX(0)}
.btn .arr{display:inline-flex;align-items:center;font-weight:700}
.btn-ghost{background:transparent;color:var(--text);border:1.5px solid var(--text)}
.btn-ghost::after{background:var(--accent)}
.btn-ghost:hover{color:var(--bg)}

/* ============ NAVBAR ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;height:80px;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  border-bottom:1px solid var(--border-soft);
}
.nav-inner{
  height:100%;display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;gap:32px;padding:0 var(--pad-x);max-width:1920px;margin:0 auto;
}
.nav-brand{display:flex;align-items:center;height:40px;color:var(--text);transition:opacity .2s ease}
.nav-brand:hover{opacity:.85}
.brand-wordmark{height:30px;width:auto;display:block;color:var(--text)}
.brand-wordmark .accent{fill:var(--accent)}
.nav-list{display:flex;gap:36px;list-style:none;margin:0;padding:0;font-family:var(--f);font-weight:500;font-size:16px;line-height:1}
.nav-list a{position:relative;padding:10px 0;transition:color .2s ease}
.nav-list a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
.nav-list a:hover,.nav-list a.is-current{color:var(--accent)}
.nav-list a:hover::after,.nav-list a.is-current::after{transform:scaleX(1)}
.nav-right{display:flex;justify-content:flex-end;align-items:center;gap:18px}

.lang-switch{display:inline-flex;align-items:stretch;height:40px;border:1.5px solid var(--border);flex:0 0 auto}
.lang-opt{padding:0 13px;display:grid;place-items:center;font-family:var(--f);font-weight:600;font-size:13px;line-height:1;letter-spacing:.06em;color:var(--text-2);transition:background .2s ease,color .2s ease}
.lang-opt + .lang-opt{border-left:1.5px solid var(--border)}
.lang-opt:hover{color:var(--text)}
.lang-opt.is-active{background:var(--accent);color:var(--bg)}
.theme-toggle{width:40px;height:40px;flex:0 0 auto;display:grid;place-items:center;border:1.5px solid var(--border);color:var(--text-2);transition:background .2s ease,color .2s ease,border-color .2s ease}
.theme-toggle:hover{color:var(--text);background:var(--glass-hover)}
.theme-toggle svg{width:18px;height:18px}
.theme-toggle .ico-sun{display:none}
.theme-toggle .ico-moon{display:block}
[data-theme="dark"] .theme-toggle .ico-sun{display:block}
[data-theme="dark"] .theme-toggle .ico-moon{display:none}

/* ============ PAGE SCAFFOLD ============ */
.page{padding-top:80px}

/* breadcrumb / kicker bar above hero */
.crumb{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:20px var(--pad-x);
  border-bottom:1px solid var(--border-soft);
  font-family:var(--f);font-weight:500;font-size:13px;letter-spacing:.04em;
  text-transform:uppercase;color:var(--text-2);
}
.crumb a{transition:color .2s ease}
.crumb a:hover{color:var(--accent)}
.crumb .sep{color:var(--text-3)}
.crumb .here{color:var(--text)}

/* ============ BLOG INDEX — HERO ============ */
.blog-hero{
  display:grid;grid-template-columns:1.1fr .9fr;
  border-bottom:1px solid var(--border-soft);
}
.blog-hero-l{
  padding:72px var(--pad-x) 64px;
  display:flex;flex-direction:column;justify-content:center;gap:24px;
  border-right:1px solid var(--border-soft);
}
.blog-hero-l .section-title{font-size:120px}
.blog-hero-lead{font-family:var(--f);font-weight:400;font-size:18px;line-height:1.6;color:var(--text-2);max-width:520px}
.blog-hero-r{
  position:relative;display:grid;place-items:center;padding:40px;min-height:340px;
  background:radial-gradient(75% 75% at 60% 35%, rgba(255,72,30,.16), transparent 64%);
  overflow:hidden;
}
.blog-hero-r .star{
  font-family:var(--f-pixel);font-weight:700;color:var(--accent);
  font-size:160px;line-height:1;opacity:.92;
}
.blog-hero-r .ghost{
  position:absolute;inset:auto 24px 18px auto;
  font-family:var(--f);font-weight:500;font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--text-3);
}

/* section bar */
.bar{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  padding:26px var(--pad-x);border-bottom:1px solid var(--border-soft);
}
.bar .mono{color:var(--text-2)}

/* ============ BLOG LIST (cards) ============ */
.blog-list{border-bottom:1px solid var(--border-soft)}
.blog-post{
  display:grid;grid-template-columns:240px 1fr 188px;
  border-top:1px solid var(--border-soft);transition:background .25s ease;
}
.blog-post:first-child{border-top:0}
.blog-post:hover{background:var(--surface)}
.blog-cover{
  border-right:1px solid var(--border-soft);
  display:grid;place-items:center;padding:26px;
  background:radial-gradient(80% 80% at 32% 28%, rgba(255,72,30,.16), transparent 62%);
}
.blog-cover svg{width:104px;height:104px;color:var(--text)}
.blog-cover-photo{padding:0;overflow:hidden;position:relative}
.blog-cover-photo img{width:100%;height:100%;max-height:180px;object-fit:cover}
.blog-main{padding:34px 38px;display:flex;flex-direction:column;gap:12px;justify-content:center}
.blog-cat{font-family:var(--f);font-weight:500;font-size:12px;line-height:1;letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
.blog-title{font-family:var(--f);font-weight:600;font-size:28px;line-height:1.22;letter-spacing:-.01em;color:var(--text);margin:0}
.blog-post:hover .blog-title{color:var(--accent)}
.blog-excerpt{font-family:var(--f);font-weight:400;font-size:15px;line-height:1.55;color:var(--text-2);margin:0;max-width:640px}
.blog-meta{border-left:1px solid var(--border-soft);padding:34px 28px;display:flex;flex-direction:column;justify-content:space-between;gap:18px}
.blog-date{font-family:var(--f);font-weight:500;font-size:12px;line-height:1.4;letter-spacing:.06em;color:var(--text-2)}
.blog-read{display:inline-flex;align-items:center;gap:9px;font-family:var(--f);font-weight:600;font-size:13px;line-height:1;letter-spacing:.04em;text-transform:uppercase;color:var(--text);transition:color .2s ease}
.blog-read .arr{font-weight:700;transition:transform .2s ease}
.blog-post:hover .blog-read{color:var(--accent)}
.blog-post:hover .blog-read .arr{transform:translateX(3px)}

/* ============ ARTICLE ============ */
.art-head{
  border-bottom:1px solid var(--border-soft);
  padding:56px var(--pad-x) 48px;
  display:flex;flex-direction:column;gap:22px;
}
.art-cat{font-family:var(--f);font-weight:600;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
.art-title{
  font-family:var(--f-display);font-weight:800;
  font-size:clamp(34px,5.4vw,76px);line-height:1.02;letter-spacing:-.025em;
  margin:0;max-width:16ch;color:var(--text);
}
.art-standfirst{font-family:var(--f);font-weight:400;font-size:clamp(17px,1.5vw,21px);line-height:1.6;color:var(--text-2);max-width:760px}
.art-byline{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  padding-top:6px;font-family:var(--f);font-weight:500;font-size:13px;
  letter-spacing:.04em;text-transform:uppercase;color:var(--text-2);
}
.art-byline .dot{width:5px;height:5px;background:var(--accent);border-radius:50%}
.art-byline .who{color:var(--text)}

/* hero image band — orange blueprint renders, shown full-bleed */
.art-hero{
  position:relative;border-bottom:1px solid var(--border-soft);
  background:var(--accent);overflow:hidden;
}
.art-hero img{width:100%;max-height:520px;object-fit:cover;display:block}
.art-hero .cap{
  position:absolute;left:var(--pad-x);bottom:18px;
  font-family:var(--f);font-weight:500;font-size:12px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--text-2);
  background:var(--glass);padding:7px 12px;backdrop-filter:blur(8px);
}

/* article body grid: rail + prose */
.art-body{
  display:grid;grid-template-columns:1fr minmax(0,760px) 1fr;
  padding:0 var(--pad-x);
}
.art-prose{grid-column:2;padding:64px 0 72px;min-width:0}
.art-prose > *{max-width:720px}
.art-prose p{font-family:var(--f);font-weight:400;font-size:18px;line-height:1.72;color:var(--text);margin:0 0 26px}
.art-prose p.lead{font-size:21px;line-height:1.6;color:var(--text)}
.art-prose h2{
  font-family:var(--f-display);font-weight:700;font-size:clamp(26px,2.6vw,36px);
  line-height:1.15;letter-spacing:-.02em;color:var(--text);
  margin:52px 0 8px;padding-top:30px;border-top:1px solid var(--border-soft);
}
.art-prose h2 .idx{color:var(--accent);font-family:var(--f);font-weight:600;font-size:14px;letter-spacing:.1em;display:block;margin-bottom:14px}
.art-prose h3{font-family:var(--f);font-weight:600;font-size:21px;line-height:1.3;color:var(--text);margin:34px 0 12px}
.art-prose a.link{color:var(--accent);border-bottom:1px solid rgba(255,72,30,.4);transition:border-color .2s ease}
.art-prose a.link:hover{border-color:var(--accent)}
.art-prose strong{font-weight:700;color:var(--text)}
.art-prose em{font-style:italic}
.art-prose ul{margin:0 0 26px;padding:0;list-style:none}
.art-prose ul li{
  position:relative;padding:0 0 0 26px;margin:0 0 13px;
  font-family:var(--f);font-weight:400;font-size:17px;line-height:1.62;color:var(--text);
}
.art-prose ul li::before{content:"";position:absolute;left:0;top:11px;width:9px;height:9px;background:var(--accent)}
.art-prose ul li strong{font-weight:700}

/* pull quote */
.art-prose blockquote{
  margin:44px 0;padding:30px 0 30px 34px;border-left:3px solid var(--accent);
  font-family:var(--f-display);font-weight:600;font-size:clamp(22px,2.5vw,30px);
  line-height:1.32;letter-spacing:-.01em;color:var(--text);max-width:720px;
}

/* callout box */
.callout{
  max-width:720px;margin:40px 0;padding:28px 30px;
  background:var(--surface);border:1px solid var(--border-soft);position:relative;
}
.callout .k{font-family:var(--f);font-weight:600;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.callout p{font-size:16px;line-height:1.66;color:var(--text-2);margin:0}

/* spec grid */
.specs{
  max-width:720px;margin:40px 0;border:1px solid var(--border-soft);
  display:grid;grid-template-columns:1fr 1fr;
}
.specs .row{padding:20px 24px;border-bottom:1px solid var(--border-soft);border-right:1px solid var(--border-soft)}
.specs .row:nth-child(2n){border-right:0}
.specs .row:nth-last-child(-n+2){border-bottom:0}
.specs .k{font-family:var(--f);font-weight:500;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-2);margin-bottom:8px}
.specs .v{font-family:var(--f);font-weight:600;font-size:19px;line-height:1.25;color:var(--text)}

/* inline diagram figure */
.figure{
  max-width:720px;margin:44px 0;border:1px solid var(--border-soft);background:var(--surface);
}
.figure .art{
  padding:34px;display:grid;place-items:center;
  background:radial-gradient(80% 90% at 50% 30%, rgba(255,72,30,.10), transparent 66%);
  border-bottom:1px solid var(--border-soft);
}
.figure .art svg{width:100%;max-width:560px;height:auto;color:var(--text)}
.figure figcaption{padding:16px 24px;font-family:var(--f);font-weight:500;font-size:13px;line-height:1.5;letter-spacing:.02em;color:var(--text-2)}
.figure figcaption b{color:var(--accent);font-weight:600}

/* article CTA */
.art-cta{
  max-width:720px;margin:52px 0 8px;padding:36px 34px;
  background:var(--accent);color:var(--bg);position:relative;overflow:hidden;
}
.art-cta h3{font-family:var(--f-display);font-weight:800;font-size:30px;line-height:1.08;letter-spacing:-.02em;margin:0 0 10px;color:var(--bg)}
.art-cta p{font-family:var(--f);font-weight:400;font-size:15px;line-height:1.6;color:var(--bg);opacity:.86;margin:0 0 22px;max-width:46ch}
.art-cta .btn{background:var(--bg);color:var(--text)}
.art-cta .btn::after{background:#000}
[data-theme="dark"] .art-cta .btn::after{background:#fff}
.art-cta .btn:hover{color:var(--bg)}

/* next / prev nav */
.art-next{
  border-top:1px solid var(--border-soft);border-bottom:1px solid var(--border-soft);
  display:grid;grid-template-columns:1fr 1fr;
}
.art-next a{
  padding:38px var(--pad-x);transition:background .2s ease;
  display:flex;flex-direction:column;gap:10px;
}
.art-next a:hover{background:var(--surface)}
.art-next a + a{border-left:1px solid var(--border-soft);text-align:right;align-items:flex-end}
.art-next .lbl{font-family:var(--f);font-weight:500;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-2)}
.art-next .ttl{font-family:var(--f);font-weight:600;font-size:21px;line-height:1.25;color:var(--text);max-width:30ch}
.art-next a:hover .ttl{color:var(--accent)}

/* ============ FOOTER (compact) ============ */
.foot{background:var(--bg)}
.foot-links{
  display:flex;align-items:center;gap:30px;flex-wrap:wrap;
  padding:34px var(--pad-x);border-top:1px solid var(--border-soft);
  border-bottom:1px solid var(--border-soft);
}
.foot-links a{
  font-family:var(--f);font-weight:500;font-size:16px;letter-spacing:.01em;color:var(--text);
  display:inline-flex;align-items:center;gap:7px;transition:color .2s ease;
}
.foot-links a svg{width:13px;height:13px;color:var(--text-2);transition:transform .2s ease,color .2s ease}
.foot-links a:hover{color:var(--accent)}
.foot-links a:hover svg{transform:translate(2px,-2px);color:var(--accent)}
.foot-links .spacer{flex:1}
.copyright{
  padding:30px var(--pad-x);display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-family:var(--f);font-weight:500;font-size:13px;line-height:1;letter-spacing:.08em;
  color:var(--text-2);text-transform:uppercase;border-bottom:1px solid var(--border-soft);
}
.copyright span:last-child{color:var(--accent)}
.labs-block{padding:70px var(--pad-x) 54px;position:relative;background:var(--bg)}
.labs-svg{width:100%;height:auto;color:var(--text)}

/* ============ RESPONSIVE ============ */
@media (max-width:1280px){
  :root{--pad-x:32px}
  .blog-hero-l .section-title{font-size:84px}
}
@media (max-width:900px){
  :root{--pad-x:20px}
  body{font-size:16px}
  .nav-list{display:none}
  .section-title{font-size:48px}
  .blog-hero{grid-template-columns:1fr}
  .blog-hero-l{border-right:0;border-bottom:1px solid var(--border-soft);padding:48px var(--pad-x) 40px}
  .blog-hero-l .section-title{font-size:64px}
  .blog-hero-r{min-height:220px}
  .blog-hero-r .star{font-size:108px}
  .blog-post{grid-template-columns:1fr}
  .blog-cover{border-right:0;border-bottom:1px solid var(--border-soft)}
  .blog-cover-photo img{max-height:220px}
  .blog-meta{border-left:0;border-top:1px solid var(--border-soft);flex-direction:row;align-items:center}
  .art-body{grid-template-columns:1fr}
  .art-prose{grid-column:1;padding:44px 0 52px}
  .art-prose > *,.art-prose p,.specs,.figure,.callout,.art-cta,.art-prose blockquote,.art-prose ul li{max-width:none}
  .specs{grid-template-columns:1fr}
  .specs .row{border-right:0}
  .specs .row:nth-last-child(2){border-bottom:1px solid var(--border-soft)}
  .art-next{grid-template-columns:1fr}
  .art-next a + a{border-left:0;border-top:1px solid var(--border-soft);text-align:left;align-items:flex-start}
  .art-hero img{max-height:300px}
  .foot-links{gap:18px}
  .foot-links .spacer{display:none;flex:0}
}
@media (max-width:560px){
  .art-byline{gap:10px}
  .copyright{flex-direction:column;align-items:flex-start;gap:10px}
}