/* ============================================================
   Crystal Bitcoin — Blog styles (dark crystalline theme)
   Shared tokens with landing (/assets/css/style.css)
   ============================================================ */
:root{
  --bg:#05121a;
  --bg-2:#081d28;
  --panel:#0b2330;
  --panel-2:#0e2c3b;
  --line:#15394a;
  --line-2:#1d4a5e;
  --ink:#eaf7fb;
  --muted:#8fb6c4;
  --muted-2:#5e8493;
  --cyan:#23d3ef;
  --cyan-2:#5ee6ff;
  --ice:#bff3ff;
  --shadow:0 18px 50px rgba(0,0,0,.45);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:
    radial-gradient(1200px 700px at 80% -10%, rgba(35,211,239,.10), transparent 60%),
    radial-gradient(900px 600px at -10% 20%, rgba(94,230,255,.06), transparent 55%),
    var(--bg);
  color:var(--ink);
  font-family:"Inter","Segoe UI",system-ui,-apple-system,sans-serif;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--cyan-2);text-decoration:none;}
a:hover{color:var(--ice);}
img{max-width:100%;display:block;}
.container{max-width:1080px;margin:0 auto;padding:0 22px;}

/* ---- Header / nav ---- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(5,18,26,.78);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:.3px;color:#fff;font-size:18px;}
.brand .gem{
  width:26px;height:26px;flex:0 0 26px;
  background:linear-gradient(135deg,var(--cyan-2),var(--cyan) 55%,#0bb6d6);
  clip-path:polygon(50% 0,100% 35%,82% 100%,18% 100%,0 35%);
  box-shadow:0 0 18px rgba(35,211,239,.55);
}
.nav-links{display:flex;align-items:center;gap:26px;list-style:none;margin:0;padding:0;}
.nav-links a{color:var(--muted);font-size:14px;font-weight:600;}
.nav-links a:hover{color:#fff;}
.lang-switch{display:flex;gap:6px;align-items:center;}
.lang-switch a{
  font-size:12px;font-weight:700;color:var(--muted-2);
  padding:5px 9px;border:1px solid var(--line);border-radius:7px;
}
.lang-switch a.active{color:#04141c;background:var(--cyan);border-color:var(--cyan);}

/* ---- Blog hero ---- */
.blog-hero{padding:54px 0 26px;border-bottom:1px solid var(--line);}
.blog-hero .eyebrow{color:var(--cyan);font-size:12px;font-weight:800;letter-spacing:2px;text-transform:uppercase;}
.blog-hero h1{font-size:38px;line-height:1.15;margin:12px 0 10px;color:#fff;letter-spacing:-.4px;}
.blog-hero p{color:var(--muted);max-width:640px;margin:0;font-size:16px;}

/* ---- Article grid ---- */
.post-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:24px;padding:40px 0;
}
.post-card{
  background:linear-gradient(180deg,var(--panel),var(--bg-2));
  border:1px solid var(--line);border-radius:16px;overflow:hidden;
  display:flex;flex-direction:column;transition:transform .2s,border-color .2s,box-shadow .2s;
}
.post-card:hover{transform:translateY(-4px);border-color:var(--line-2);box-shadow:var(--shadow);}
.post-card .thumb{aspect-ratio:16/9;width:100%;object-fit:cover;background:#0a2230;}
.post-card .pc-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-meta{display:flex;align-items:center;gap:8px;color:var(--muted-2);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;}
.post-card h2{font-size:19px;line-height:1.3;margin:0;color:#fff;}
.post-card h2 a{color:#fff;}
.post-card h2 a:hover{color:var(--cyan-2);}
.post-card p{color:var(--muted);font-size:14px;margin:0;flex:1;}
.post-card .read{color:var(--cyan-2);font-size:13px;font-weight:700;}
.lang-chip{font-size:10px;font-weight:800;color:var(--cyan);border:1px solid var(--line-2);border-radius:5px;padding:2px 6px;letter-spacing:1px;}

.empty{padding:60px 0;text-align:center;color:var(--muted);}

/* ---- Pagination ---- */
.pagination{display:flex;justify-content:center;align-items:center;gap:6px;padding:10px 0 60px;flex-wrap:wrap;}
.pagination a,.pagination span{padding:9px 14px;border-radius:9px;font-size:14px;font-weight:600;color:var(--muted);border:1px solid var(--line);}
.pagination a:hover{color:#fff;border-color:var(--line-2);}
.pagination .current{background:var(--cyan);color:#04141c;border-color:var(--cyan);}
.pagination .dots{border:none;}

/* ---- Single article ---- */
.article-wrap{max-width:780px;margin:0 auto;padding:40px 0 60px;}
.crumbs{color:var(--muted-2);font-size:13px;font-weight:600;margin-bottom:18px;}
.crumbs a{color:var(--muted);}
.article-wrap h1{font-size:34px;line-height:1.2;margin:0 0 16px;color:#fff;letter-spacing:-.4px;}
.article-meta{display:flex;align-items:center;gap:10px;color:var(--muted-2);font-size:13px;font-weight:600;margin-bottom:22px;}
.hero-img{width:100%;max-height:420px;object-fit:cover;border-radius:16px;border:1px solid var(--line);margin:0 0 26px;}
.article-body{font-size:17px;line-height:1.85;color:#d6e9f0;}
.article-body h2{font-size:25px;margin:34px 0 14px;color:#fff;line-height:1.25;}
.article-body h3{font-size:20px;margin:26px 0 10px;color:#fff;}
.article-body p{margin:0 0 18px;}
.article-body a{text-decoration:underline;}
.article-body ul,.article-body ol{margin:0 0 18px 22px;}
.article-body li{margin:6px 0;}
.article-body img{border-radius:12px;margin:20px 0;border:1px solid var(--line);}
.article-body strong{color:#fff;}
.article-body blockquote{margin:22px 0;padding:14px 20px;border-left:3px solid var(--cyan);background:var(--panel);border-radius:0 10px 10px 0;color:var(--ice);}

.expert-block{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;margin:32px 0;}
.expert-header{display:flex;align-items:center;gap:14px;margin-bottom:12px;}
.expert-photo{width:56px;height:56px;border-radius:50%;object-fit:cover;border:2px solid var(--cyan);}
.expert-name{font-weight:800;color:#fff;}
.expert-position{font-size:12px;color:var(--muted-2);}

.faq-section{margin:36px 0;}
.faq-section>h2{font-size:24px;color:#fff;margin-bottom:16px;}
.faq-item{margin-bottom:12px;padding:16px 20px;background:var(--panel);border:1px solid var(--line);border-radius:12px;}
.faq-item h3{margin:0 0 8px;font-size:16px;color:var(--cyan-2);}
.faq-item p{margin:0;font-size:14px;color:var(--muted);}

.related{margin-top:48px;}
.related>h2{font-size:22px;color:#fff;margin-bottom:18px;}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;}
.related-card{background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:transform .2s,border-color .2s;}
.related-card:hover{transform:translateY(-3px);border-color:var(--line-2);}
.related-card img{width:100%;height:130px;object-fit:cover;}
.related-card .rc-body{padding:13px 15px;}
.related-card h3{font-size:15px;margin:0;color:#fff;line-height:1.35;}

/* ---- Footer ---- */
.site-footer{border-top:1px solid var(--line);padding:34px 0;color:var(--muted-2);font-size:13px;}
.site-footer .container{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;}
.site-footer a{color:var(--muted);}

@media(max-width:640px){
  .nav-links{gap:16px;}
  .nav-links a{font-size:13px;}
  .blog-hero h1{font-size:30px;}
  .article-wrap h1{font-size:27px;}
  .article-body{font-size:16px;}
}