:root{
  --navy:#0a0f24;
  --navy-2:#111a3a;
  --blue:#3b82f6;
  --purple:#8b5cf6;
  --cyan:#22d3ee;
  --text-dark:#0f172a;
  --text-muted:#5b6478;
  --bg-light:#f7f8fc;
  --white:#ffffff;
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  color:var(--text-dark);
  background:var(--bg-light);
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}
h1,h2,h3{font-weight:800;line-height:1.15;}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:999px;
  font-weight:700;font-size:15px;cursor:pointer;border:none;transition:transform .25s ease,box-shadow .25s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;
  box-shadow:0 8px 24px rgba(59,130,246,.35);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(59,130,246,.45);}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.25);backdrop-filter:blur(6px);}
.btn-ghost:hover{background:rgba(255,255,255,.16);transform:translateY(-3px);}

/* NAV (shared with main site) */
header{position:fixed;top:0;left:0;right:0;z-index:1000;padding:20px 0;transition:all .3s ease;background:rgba(10,15,36,.85);backdrop-filter:blur(14px);}
header.scrolled{padding:12px 0;box-shadow:0 4px 24px rgba(0,0,0,.15);}
nav{display:flex;align-items:center;justify-content:space-between;}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:#fff;letter-spacing:-.02em;}
.logo span{background:linear-gradient(135deg,var(--cyan),var(--purple));-webkit-background-clip:text;background-clip:text;color:transparent;}
.logo-mark{width:34px;height:34px;border-radius:9px;flex-shrink:0;}
.nav-links{display:flex;gap:34px;}
.nav-links a{color:rgba(255,255,255,.85);font-weight:600;font-size:14.5px;transition:color .2s;}
.nav-links a:hover,.nav-links a.active{color:var(--cyan);}
.nav-cta{display:none;}
@media(min-width:860px){.nav-cta{display:inline-flex;}}
@media(max-width:859px){.nav-links{display:none;}}

/* BLOG HERO */
.blog-hero{
  position:relative;padding:170px 0 80px;
  background-image:linear-gradient(180deg,rgba(10,15,36,.55) 0%,rgba(17,26,58,.8) 100%),var(--hero-img,none);
  background-size:cover;background-position:center;background-color:var(--navy);
  color:#fff;overflow:hidden;
}
.blog-hero::before{
  content:'';position:absolute;inset:0;
  background-image:radial-gradient(circle,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:34px 34px;opacity:.5;
}
.hero-index{--hero-img:url('/blog/banner-index.png');}
.hero-platform{--hero-img:url('/blog/banner-platform.png');}
.hero-ai{--hero-img:url('/blog/banner-ai.png');}
.hero-performance{--hero-img:url('/blog/banner-performance.png');}
.hero-pos{--hero-img:url('/blog/banner-pos-printer.png');}
.hero-sportsleague{--hero-img:url('https://images.unsplash.com/photo-1601332053592-13e8ce5ea88a?w=1600&h=420&fit=crop&q=75&fm=jpg');}
.hero-networking{--hero-img:url('https://images.unsplash.com/photo-1521791136064-7986c2920216?w=1600&h=420&fit=crop&q=75&fm=jpg');}
.hero-relay{--hero-img:url('https://images.unsplash.com/photo-1461897104016-0b3b00cc81ee?w=1600&h=420&fit=crop&q=75&fm=jpg');}

/* architecture diagram (case study) */
.flow-diagram{width:100%;height:auto;margin:28px 0;}
.flow-diagram .box{fill:#f1f4fb;stroke:#dfe4f2;stroke-width:1.5;}
.flow-diagram .box-dark{fill:#0a0f24;stroke:#0a0f24;}
.flow-diagram text{font-family:Arial,Helvetica,sans-serif;}
.flow-diagram .label{font-size:13px;font-weight:700;fill:#0f172a;}
.flow-diagram .label-light{font-size:13px;font-weight:700;fill:#ffffff;}
.flow-diagram .sublabel{font-size:11px;fill:#5b6478;}
.flow-diagram .arrow{stroke:url(#flowgrad);stroke-width:2.5;fill:none;marker-end:url(#arrowhead);}
.blog-hero .container{position:relative;z-index:2;}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--cyan);margin-bottom:14px;}
.blog-hero h1{font-size:clamp(30px,4.5vw,46px);letter-spacing:-.02em;margin-bottom:16px;}
.blog-hero p{color:rgba(255,255,255,.75);font-size:17px;max-width:600px;line-height:1.6;}
.breadcrumb{font-size:13px;color:rgba(255,255,255,.55);margin-bottom:18px;}
.breadcrumb a{color:rgba(255,255,255,.85);font-weight:600;}
.breadcrumb a:hover{color:var(--cyan);}

/* BLOG LISTING */
.blog-section{padding:80px 0 110px;}
.blog-grid{display:grid;gap:28px;grid-template-columns:1fr;}
@media(min-width:720px){.blog-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1080px){.blog-grid{grid-template-columns:repeat(3,1fr);}}
.post-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid #eef0f6;transition:transform .3s ease,box-shadow .3s ease;display:flex;flex-direction:column;}
.post-card:hover{transform:translateY(-8px);box-shadow:0 22px 44px rgba(15,23,42,.1);}
.post-thumb{height:150px;position:relative;display:flex;align-items:center;justify-content:center;font-size:34px;color:#fff;}
.post-thumb::after{content:'';position:absolute;inset:0;background-image:radial-gradient(circle,rgba(255,255,255,.18) 1px,transparent 1px);background-size:16px 16px;}
.post-thumb svg{width:36px;height:36px;position:relative;z-index:2;}
.pt1{background:linear-gradient(135deg,#3b82f6,#2563eb);}
.pt2{background:linear-gradient(135deg,var(--purple),#6d28d9);}
.pt3{background:linear-gradient(135deg,#f97316,#c2410c);}
.pt4{background:linear-gradient(135deg,#10b981,#047857);}
.pt5{background:linear-gradient(135deg,#eab308,#b45309);}
.pt6{background:linear-gradient(135deg,#6366f1,#4338ca);}
.pt7{background:linear-gradient(135deg,#ef4444,#b91c1c);}
.post-thumb.has-photo{background-size:cover;background-position:center;}
.post-thumb.has-photo::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,15,36,.55),rgba(10,15,36,.35));}
.post-body{padding:24px 24px 28px;display:flex;flex-direction:column;flex:1;}
.post-meta{display:flex;gap:10px;align-items:center;font-size:12.5px;color:var(--text-muted);margin-bottom:12px;flex-wrap:wrap;}
.cat-tag{background:#f1f4fb;color:var(--blue);font-size:11.5px;font-weight:700;padding:5px 11px;border-radius:999px;text-transform:uppercase;letter-spacing:.03em;}
.post-body h3{font-size:18px;margin-bottom:10px;line-height:1.35;}
.post-body p{color:var(--text-muted);font-size:14.5px;line-height:1.65;margin-bottom:16px;flex:1;}
.post-link{font-weight:700;font-size:14px;color:var(--blue);display:inline-flex;align-items:center;gap:6px;}
.post-link svg{width:14px;height:14px;transition:transform .2s ease;}
.post-card:hover .post-link svg{transform:translateX(3px);}

/* ARTICLE */
.article-section{padding:70px 0 100px;}
.article-wrap{max-width:760px;margin:0 auto;}
.article-body{background:#fff;border-radius:var(--radius);padding:44px;border:1px solid #eef0f6;margin-top:-90px;position:relative;z-index:3;box-shadow:0 24px 60px rgba(15,23,42,.08);}
@media(max-width:640px){.article-body{padding:28px 22px;}}
.article-body h2{font-size:clamp(22px,3vw,28px);margin:38px 0 16px;color:var(--text-dark);}
.article-body h2:first-child{margin-top:0;}
.article-body h3{font-size:19px;margin:26px 0 12px;color:var(--text-dark);}
.article-body p{font-size:16px;line-height:1.8;color:#334155;margin-bottom:18px;}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:0;}
.article-body li{font-size:15.5px;line-height:1.75;color:#334155;padding:6px 0 6px 26px;position:relative;}
.article-body ul li::before{content:'';position:absolute;left:0;top:15px;width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--purple));}
.article-body ol{counter-reset:ol-count;}
.article-body ol li{counter-increment:ol-count;}
.article-body ol li::before{content:counter(ol-count);position:absolute;left:0;top:5px;width:20px;height:20px;border-radius:6px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;font-size:11px;font-weight:800;display:flex;align-items:center;justify-content:center;}
.article-body blockquote{border-left:4px solid var(--blue);background:#f1f4fb;padding:18px 22px;border-radius:0 10px 10px 0;font-size:15.5px;color:var(--text-dark);font-weight:600;margin:24px 0;line-height:1.7;}
.article-body strong{color:var(--text-dark);}
.article-cta{margin-top:38px;padding:30px;border-radius:var(--radius);background:linear-gradient(135deg,#0a0f24,#1e1b4b 60%,#312e81);color:#fff;text-align:center;}
.article-cta h3{color:#fff;font-size:20px;margin-bottom:10px;}
.article-cta p{color:rgba(255,255,255,.75);font-size:14.5px;margin-bottom:20px;}

.related-section{padding:20px 0 100px;}
.related-title{font-size:22px;margin-bottom:26px;}

footer{background:var(--navy);color:rgba(255,255,255,.6);padding:40px 0;font-size:14px;}
.footer-row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;align-items:center;}
.social-links{display:flex;gap:12px;align-items:center;}
.social-links a{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.08);color:rgba(255,255,255,.75);transition:background .2s ease,color .2s ease,transform .2s ease;}
.social-links a:hover{background:var(--blue);color:#fff;transform:translateY(-2px);}
.social-links svg{width:18px;height:18px;fill:currentColor;}

::selection{background:var(--purple);color:#fff;}