:root{
  --bg:#0a0e27;
  --bg-2:#0f1729;
  --text:#e8eef7;
  --muted:#a8b8d8;
  --accent:#00e5ff;
  --accent-soft:rgba(0, 229, 255, 0.08);
  --accent-glow:rgba(0, 229, 255, 0.25);
  --card:#0f1729;
  --border:#1a2847;
  --surface:#141e35;
  --gradient-1:#00e5ff;
  --gradient-2:#0099ff;
  --gradient-3:#00ffcc;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--accent);text-decoration:none;transition:color 0.3s ease}
a:hover{color:#00f0ff;text-decoration:none}
img{max-width:100%;display:block}
main{padding:0 20px 48px}
.container{max-width:1100px;margin:0 auto;padding:24px 0}

/* Expertise Section */
.expertise-section {
  padding: 60px 0;
  border-top: 1px solid rgba(0, 229, 255, 0.1);
  border-bottom: 1px solid rgba(0, 229, 255, 0.1);
  background: linear-gradient(180deg, rgba(0, 229, 255, 0.02) 0%, transparent 50%, rgba(0, 153, 255, 0.01) 100%);
  margin: 40px auto;
}

.expertise-content {
  max-width: 900px;
  margin: 0 auto;
}

.expertise-content p {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 20px;
  color: #d8e5ff;
  text-align: justify;
  font-weight: 400;
}

.expertise-content p:last-child {
  margin-bottom: 0;
}

.expertise-content strong {
  color: var(--accent);
  font-weight: 700;
  transition: color 0.3s ease;
}

.expertise-content p:hover strong {
  color: #00f0ff;
}
.btn{display:inline-flex;gap:8px;align-items:center;padding:13px 28px;border-radius:10px;background:linear-gradient(135deg, var(--accent), #00b8e6);color:#000814;
  font-weight:700;border:0;transition:all .25s cubic-bezier(0.4,0,0.2,1);box-shadow:0 4px 15px rgba(0,229,255,0.25)}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(0,229,255,0.35),0 0 20px rgba(0,229,255,0.2)}
.btn.ghost{background:transparent;color:var(--accent);border:1.5px solid var(--accent);box-shadow:inset 0 0 20px rgba(0,229,255,0.1)}
.btn.ghost:hover{background:rgba(0,229,255,0.08);box-shadow:inset 0 0 20px rgba(0,229,255,0.15),0 0 20px rgba(0,229,255,0.2)}

/* Header & Nav */
header {
  padding: 18px 22px;
  border-bottom: 1px solid rgba(0, 229, 255, 0.1);
  background: linear-gradient(180deg, rgba(10, 14, 39, 0.95), rgba(10, 14, 39, 0.85));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 8px 32px rgba(0, 229, 255, 0.08);
}
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 12px;
  text-align: center;
}
.brand {
  font-family: "Fira Code", monospace;
  font-weight: 700;
  color: var(--accent);
  font-size: 1rem;
}
nav { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
nav a {
  font-size: 0.9rem;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid transparent;
  color: var(--text);
  transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  position: relative;
}
nav a:hover { 
  border-color: var(--accent);
  background: rgba(0, 229, 255, 0.1);
  color: var(--accent);
  text-decoration: none;
  box-shadow: inset 0 0 12px rgba(0, 229, 255, 0.08);
}

.hero{
  min-height:85vh;
  display:grid;
  place-items:center;
  position:relative;
  overflow:hidden;
  text-align:center;
  padding:60px 16px;
  background:linear-gradient(135deg, rgba(0,229,255,0.03) 0%, rgba(0,153,255,0.02) 50%, rgba(0,229,255,0.01) 100%)
}
.hero::before{
  content:'';
  position:absolute;
  top:-50%;
  right:-10%;
  width:500px;
  height:500px;
  background:radial-gradient(circle, rgba(0,229,255,0.1) 0%, transparent 70%);
  border-radius:50%;
  filter:blur(40px);
  z-index:0;
}
.hero::after{
  content:'';
  position:absolute;
  bottom:-20%;
  left:-5%;
  width:400px;
  height:400px;
  background:radial-gradient(circle, rgba(0,153,255,0.08) 0%, transparent 70%);
  border-radius:50%;
  filter:blur(40px);
  z-index:0;
}
.hero h1{font-size:clamp(32px,7vw,62px);margin:0 0 12px;position:relative;z-index:1;font-weight:800;letter-spacing:-0.02em;background:linear-gradient(135deg, #e8eef7 0%, var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{max-width:760px;margin:0 auto;color:var(--muted);font-size:clamp(15px,2.2vw,19px);position:relative;z-index:1;font-weight:500}
.hero .cta{margin-top:32px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap;position:relative;z-index:1}
canvas.bg{position:fixed;inset:0;z-index:-1;background:linear-gradient(135deg, #0a0e27 0%, #0f1729 50%, #0a0e27 100%)}
.footer, body > footer{opacity:.85;text-align:center;padding:32px 20px;border-top:1px solid rgba(0,229,255,0.1);background:linear-gradient(180deg, rgba(10,14,39,0.5), rgba(10,14,39,0.3));margin-top:60px;font-size:0.95rem;color:var(--muted)}

/* Card Grid & Flip Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 40px;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}
.card-link { text-decoration: none; color: inherit; perspective: 1200px; display: block; }
.flip-card {
  position: relative;
  width: 100%;
  height: 280px;
  border-radius: 16px;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 8px 24px rgba(0, 229, 255, 0.12), 0 4px 12px rgba(0, 0, 0, 0.2);
}
.card-link:hover .flip-card { transform: rotateY(180deg); }
.flip-face {
  position: absolute;
  inset: 0;
  border-radius: 16px;
  backface-visibility: hidden;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1.5px solid var(--border);
  background: var(--bg-2);
}
.flip-front { 
  background: linear-gradient(135deg, rgba(15, 23, 41, 0.9) 0%, rgba(10, 14, 39, 0.7) 100%);
  border-color: rgba(0, 229, 255, 0.15);
}
.flip-back {
  background: linear-gradient(135deg, rgba(0, 100, 100, 0.3) 0%, rgba(0, 51, 102, 0.2) 100%);
  transform: rotateY(180deg);
  border-color: var(--accent);
}
.card-title { font-size: 1.2rem; font-weight: 800; margin-bottom: 10px; color: #fff; letter-spacing:-0.01em; }
.card-subtitle { font-size: 0.95rem; color: var(--muted); line-height: 1.6; font-weight:500; }
.card-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: auto; }
.meta-pill {
  font-size: 0.75rem;
  padding: 6px 12px;
  border-radius: 6px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--accent);
  font-family: "Fira Code", monospace;
  font-weight:600;
  transition:all 0.3s ease;
}
.meta-pill:hover { background: rgba(0, 229, 255, 0.15); box-shadow: 0 0 12px rgba(0, 229, 255, 0.2); }
.back-body { font-size: 0.98rem; color: #e8eef7; font-weight:500; }
.back-footer { display: flex; justify-content: space-between; align-items: center; color: var(--accent); font-size: 0.9rem; font-weight: 700; }

/* Blog layout */
.blog-header{max-width:900px;margin:0 auto;padding:32px 0 12px;text-align:center}
.blog-header h1{margin:0 0 10px;font-size:clamp(28px,4vw,40px)}
.blog-meta{margin:0;color:var(--muted);font-size:0.95rem}
.blog-content{max-width:900px;margin:0 auto;padding:12px 0 36px;font-size:1.02rem;color:#d8e5ff}
.blog-content section{margin-bottom:28px}
.blog-content h2{margin:20px 0 12px;font-size:1.35rem}
.blog-content h3{margin:16px 0 10px;font-size:1.15rem}
.blog-content p{margin:12px 0;color:#d8e5ff}
.blog-content ul, .blog-content ol{padding-left:24px;margin:12px 0}
.blog-content li{margin:6px 0;color:#d8e5ff}
.blog-content blockquote{
  margin:18px 0;
  padding:14px 16px;
  border-left:4px solid var(--accent);
  background:linear-gradient(145deg, rgba(15,21,35,0.9), rgba(8,12,20,0.9));
  border-radius:12px;
  color:#e6f4ff;
}
.blog-content .takeaway-box,
.blog-content .checklist-box,
.blog-content .faq-box{
  margin:20px 0;
  padding:18px 20px;
  border:1px solid rgba(0,229,255,0.18);
  border-radius:12px;
  background:linear-gradient(145deg, rgba(15,23,41,0.88), rgba(8,12,20,0.92));
  box-shadow:0 8px 18px rgba(0,0,0,0.2);
}
.blog-content .takeaway-box strong,
.blog-content .checklist-box strong,
.blog-content .faq-box strong{color:var(--accent)}
.blog-content .toc{
  display:grid;
  gap:8px;
  margin:18px 0 24px;
  padding:16px 18px;
  border:1px solid rgba(38,52,71,0.9);
  border-radius:12px;
  background:rgba(12,18,32,0.78);
}
.blog-content .toc a{font-weight:600}
.blog-content table{
  width:100%;
  border-collapse:collapse;
  margin:20px 0;
  color:#e6eef8;
  font-size:0.95rem;
}
.blog-content th,
.blog-content td{
  padding:10px;
  border-bottom:1px solid rgba(155,177,201,0.24);
  vertical-align:top;
}
.blog-content th{text-align:left;color:#fff;background:rgba(0,229,255,0.06)}
.blog-content hr{border:0;border-top:1px solid rgba(155,177,201,0.4);margin:24px 0}
.blog-content img{border-radius:14px;border:1px solid rgba(38,52,71,0.8);box-shadow:0 10px 24px rgba(0,0,0,0.25);margin:16px auto}
.blog-content code{font-family:"Fira Code", "SFMono-Regular", Menlo, monospace;background:#0c1220;padding:2px 6px;border-radius:6px;color:#b6eaff;font-size:0.95rem}
.blog-content pre{background:#0c1220;border:1px solid rgba(38,52,71,0.9);border-radius:14px;padding:14px;overflow-x:auto;font-family:"Fira Code","SFMono-Regular",Menlo,monospace;font-size:0.95rem;color:#d5e8ff;box-shadow:0 8px 18px rgba(0,0,0,0.25)}

/* ASCII diagram styling for blog posts */
.diagram-card{margin:22px 0;background:linear-gradient(145deg, #0f1b30, #0a1324);border:1px solid #12233d;border-radius:12px;box-shadow:0 10px 24px rgba(0,0,0,0.18);overflow:hidden}
.diagram-card figcaption{margin:0;padding:12px 16px;background:rgba(255,255,255,0.04);color:#dfe7f5;font-weight:600;letter-spacing:0.02em;border-bottom:1px solid #12233d;text-align:center}
pre.diagram{margin:0;padding:16px 18px 18px;background:transparent;color:#f5f8ff;font-family:"SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;font-size:clamp(0.85rem, 0.8vw + 0.5rem, 1.02rem);line-height:1.65;letter-spacing:0.01em;white-space:pre;overflow-x:auto}

@media (max-width:900px){
  .container{padding:18px 0}
  .blog-content{padding:4px 0 28px;font-size:1rem}
  .blog-header{padding:26px 0 8px}
  .blog-content pre{font-size:0.92rem}
}
@media (max-width:640px){
  main{padding:0 16px 40px}
  .blog-header h1{font-size:clamp(24px,6vw,32px)}
  .blog-content{padding:0 0 24px}
  .diagram-card{border-radius:10px}
  pre.diagram{font-size:clamp(0.82rem, 1.4vw + 0.46rem, 0.98rem);padding:14px 14px 16px}
}
@media (prefers-reduced-motion: reduce){
  .btn{transition:none}
}