:root{
  --bg:#05060b;
  --bg2:#0a0d18;
  --surface:rgba(255,255,255,.045);
  --surface2:rgba(255,255,255,.08);
  --border:rgba(255,255,255,.09);
  --text:#eaedf6;
  --dim:#8b92a8;
  --dim2:#737c96;
  --accent:#7c5cff;
  --accent2:#00e0ff;
  --accent3:#ff3fa4;
  --grad: linear-gradient(120deg,var(--accent),var(--accent2));
  --ff-h:'Space Grotesk',sans-serif;
  --ff-b:'Inter',sans-serif;
  --ease:cubic-bezier(.16,1,.3,1);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;overflow-x:hidden;}
body{background:var(--bg);color:var(--text);font-family:var(--ff-b);line-height:1.65;overflow-x:hidden;}
.wrap{max-width:900px;margin:0 auto;padding:0 24px;}
a{color:inherit;}
img{display:block;max-width:100%;}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(5,6,11,.75);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:76px;}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--ff-h);font-size:19px;font-weight:600;text-decoration:none;}
.logo-icon{width:28px;height:28px;flex-shrink:0;}
.logo-icon .sat{fill:var(--accent2);filter:drop-shadow(0 0 5px var(--accent2));}
.i-dot{display:inline-flex;flex-direction:column;align-items:center;justify-content:flex-end;height:.75em;position:relative;top:2px;margin:0 1px;}
.i-dot .dot{width:4px;height:4px;border-radius:50%;background:var(--accent2);box-shadow:0 0 8px 2px var(--accent2);margin-bottom:3px;}
.i-dot .stem{width:2.5px;height:11px;border-radius:1px;background:var(--grad);}
.nav-links{display:flex;gap:28px;font-size:14.5px;}
.nav-links a{text-decoration:none;color:var(--dim);transition:color .25s;}
.nav-links a:hover,.nav-links a.active{color:var(--text);}

/* ---------- article ---------- */
main{padding:64px 0 100px;}
.post-tag{display:inline-block;font-size:12.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--accent2);margin-bottom:18px;}
.post-title{font-family:var(--ff-h);font-size:clamp(28px,4.5vw,44px);font-weight:700;line-height:1.15;margin-bottom:18px;}
.post-meta{color:var(--dim2);font-size:14px;margin-bottom:40px;}
.post-body{font-size:17px;color:var(--text);}
.post-body p{margin-bottom:20px;}
.post-body h2{font-family:var(--ff-h);font-size:26px;font-weight:600;margin:44px 0 16px;}
.post-body h3{font-family:var(--ff-h);font-size:20px;font-weight:600;margin:32px 0 12px;}
.post-body ul,.post-body ol{margin:0 0 20px 22px;}
.post-body li{margin-bottom:8px;}
.post-body strong{color:var(--text);font-weight:600;}
.post-body a{color:var(--accent2);text-decoration:underline;text-underline-offset:3px;}
.post-table{width:100%;border-collapse:collapse;margin:20px 0 28px;font-size:15px;}
.post-table th,.post-table td{padding:12px 14px;border:1px solid var(--border);text-align:left;}
.post-table th{background:var(--surface);font-family:var(--ff-h);font-weight:600;}

.cta-box{
  margin-top:56px;padding:36px;border-radius:20px;border:1px solid var(--border);
  background:linear-gradient(160deg,rgba(124,92,255,.08),rgba(0,224,255,.05));
  text-align:center;
}
.cta-box h3{font-family:var(--ff-h);font-size:22px;margin-bottom:10px;}
.cta-box p{color:var(--dim);margin-bottom:22px;}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:999px;
  font-family:var(--ff-h);font-weight:600;font-size:14.5px;text-decoration:none;
  background:var(--grad);color:#04050a;transition:transform .25s var(--ease);
}
.btn:hover{transform:translateY(-2px);}
.btn-ghost{background:transparent;border:1px solid var(--border);color:var(--text);margin-left:10px;}

.back-link{display:inline-block;margin-bottom:28px;color:var(--dim);font-size:14px;text-decoration:none;}
.back-link:hover{color:var(--text);}

/* ---------- blog index ---------- */
.post-list{display:flex;flex-direction:column;gap:24px;margin-top:36px;}
.post-card{
  display:block;padding:28px;border-radius:18px;border:1px solid var(--border);background:var(--surface);
  text-decoration:none;transition:border-color .25s,transform .25s var(--ease);
}
.post-card:hover{border-color:var(--surface2);transform:translateY(-2px);}
.post-card .post-tag{margin-bottom:12px;}
.post-card h2{font-family:var(--ff-h);font-size:22px;font-weight:600;color:var(--text);margin-bottom:10px;}
.post-card p{color:var(--dim);font-size:15px;margin-bottom:14px;}
.post-card .post-meta{margin-bottom:0;}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--border);padding:44px 0;}
.foot-row{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px;}
.foot-links{display:flex;gap:26px;}
.foot-links a{color:var(--dim);font-size:13.5px;text-decoration:none;transition:color .25s;}
.foot-links a:hover{color:var(--accent2);}
.foot-copy{color:var(--dim2);font-size:13px;margin-top:26px;}

@media (max-width:640px){
  .nav-links{gap:16px;font-size:13px;}
  main{padding:44px 0 70px;}
  .cta-box{padding:28px 22px;}
}