/* blog.css — single source of truth for all blog page chrome.
   Edit here, never copy into the HTML files. */

:root{
  --bg:#020811;--bg-deep:#010f1f;--panel:rgba(5,20,36,.6);
  --line:rgba(148,180,212,.10);--line-bright:rgba(22,135,245,.22);
  --blue:#1687f5;--blue-bright:#3a9af5;
  --text:#F2F7FF;--text-2:#A9B8CC;--text-3:#7E92A8;
  --font-display:"Space Grotesk",system-ui,sans-serif;
  --font-body:"Inter",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
body{
  background:linear-gradient(180deg,var(--bg) 0%,var(--bg-deep) 100%) fixed,var(--bg-deep);
  background-color:var(--bg-deep);color:var(--text);font-family:var(--font-body);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--blue-bright);outline-offset:3px;border-radius:4px}

/* starfield */
.stars{position:fixed;inset:0;z-index:0;pointer-events:none}
.stars::before{
  content:"";position:absolute;inset:0;background-repeat:repeat;
  background-image:radial-gradient(1px 1px at 22px 38px,rgba(216,233,255,.5) 50%,transparent 51%),
    radial-gradient(1px 1px at 140px 96px,rgba(190,216,246,.32) 50%,transparent 51%),
    radial-gradient(1px 1px at 252px 184px,rgba(216,233,255,.4) 50%,transparent 51%);
  background-size:360px 250px;
}

/* nav */
.wrap{max-width:1120px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.nav{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(2,8,17,.85);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1120px;margin:0 auto;padding:0 24px;height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:16px}
.nav-right{display:flex;align-items:center;gap:14px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-display);
  font-weight:600;letter-spacing:.22em;font-size:.95rem;text-decoration:none;color:inherit}
.nav-link{font-size:.85rem;color:var(--text-2);transition:color .2s;
  min-height:34px;display:inline-flex;align-items:center}
.nav-link:hover{color:var(--text)}
.lang{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.lang a{
  font-family:var(--font-mono);font-size:.64rem;letter-spacing:.08em;
  color:var(--text-3);display:inline-flex;align-items:center;padding:0 10px;min-height:34px;
  transition:color .2s,background .2s;
}
.lang a.on{color:var(--blue-bright);background:rgba(22,135,245,.07)}
.lang a:hover{color:var(--text)}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;font-weight:600;
  font-size:.84rem;padding:9px 18px;border-radius:14px;background:var(--blue);color:#fff;
  transition:background .2s;
}
.nav-cta:hover{background:var(--blue-bright)}

/* blog index */
main.wrap{margin-top:150px;margin-bottom:80px}
.hero-head{max-width:640px;margin-bottom:56px}
.eyebrow{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;color:var(--blue-bright);
  text-transform:uppercase;margin-bottom:14px;display:block}
h1{font-family:var(--font-display);font-weight:500;font-size:clamp(2rem,4.4vw,2.9rem);margin-bottom:14px}
.hero-head p{color:var(--text-2);font-size:1.05rem}
.post-list{display:grid;gap:20px;max-width:760px}
.post-card{
  display:block;padding:28px 30px;border:1px solid var(--line);border-radius:18px;
  background:var(--panel);transition:border-color .2s;
}
.post-card:hover{border-color:var(--line-bright)}
.post-card .tag{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.16em;
  color:var(--blue-bright);text-transform:uppercase;margin-bottom:10px;display:block}
.post-card h2{font-family:var(--font-display);font-weight:500;font-size:1.35rem;margin-bottom:8px;color:var(--text)}
.post-card p{color:var(--text-2);font-size:.95rem;margin-bottom:10px}
.post-card .meta{font-family:var(--font-mono);font-size:.7rem;color:var(--text-3);text-transform:uppercase}

/* article */
article.post{
  max-width:760px;margin:130px auto 60px;padding:0 24px;position:relative;z-index:1;
  line-height:1.7;
}
article h1{font-size:clamp(1.9rem,4vw,2.7rem);line-height:1.18}
article a{color:var(--blue-bright)}
article a:hover{text-decoration:underline}
.meta{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;color:var(--text-3);
  text-transform:uppercase;margin-bottom:40px}
.lede{font-size:1.15rem;color:var(--text-2);margin-bottom:32px}
article h2{font-family:var(--font-display);font-weight:500;font-size:1.5rem;margin:40px 0 14px;color:var(--text)}
article p{color:var(--text-2);font-size:1rem;margin-bottom:18px}
article strong{color:var(--text)}
article ul{margin:0 0 18px 22px;color:var(--text-2)}
article li{margin-bottom:8px}
blockquote{
  border-left:3px solid var(--blue);padding:4px 0 4px 20px;margin:28px 0;
  color:var(--text);font-style:italic;font-size:1.05rem;
}
.back-link{display:inline-block;margin-bottom:28px;font-family:var(--font-mono);
  font-size:.78rem;letter-spacing:.05em;color:var(--text-3)}
.back-link:hover{color:var(--text-2);text-decoration:none}
.cta-box{
  margin-top:52px;padding:32px;border:1px solid var(--line-bright);border-radius:20px;
  background:var(--panel);text-align:center;
}
.cta-box h3{font-family:var(--font-display);font-weight:500;font-size:1.3rem;margin-bottom:10px;color:var(--text)}
.cta-box p{margin-bottom:20px}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;font-weight:600;
  font-size:.95rem;padding:13px 28px;border-radius:16px;background:var(--blue);color:#fff;
  transition:background .2s;
}
.btn-primary:hover{background:var(--blue-bright);text-decoration:none}

/* footer */
footer{border-top:1px solid var(--line);padding:24px 0;margin-top:60px;position:relative;z-index:1}
.foot{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  color:var(--text-3);font-size:.85rem}
.foot-links a{color:var(--text-3);text-decoration:underline;margin-left:14px}
.foot-links a:hover{color:var(--text-2)}

@media (max-width:640px){
  main.wrap{margin-top:110px}
  article.post{margin-top:100px}
  .foot{flex-direction:column;align-items:flex-start;gap:10px}
  .foot-links a{margin-left:0;margin-right:14px}
}