@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg:      #050c14;
  --bg2:     #081220;
  --bg3:     #0b1a2e;
  --surface: #0e2140;
  --border:  rgba(0,200,220,.12);
  --accent:  #00c8dc;
  --accent2: #00e5a0;
  --accent3: #5f8fff;
  --text:    #d4e8f0;
  --muted:   #5a7e94;
  --white:   #f0faff;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 1000; opacity: .6;
}

.bg-glow  { position:fixed; top:-20vh; left:-10vw; width:70vw; height:70vh; background:radial-gradient(ellipse,rgba(0,200,220,.06) 0%,transparent 70%); pointer-events:none; z-index:0; }
.bg-glow2 { position:fixed; bottom:-20vh; right:-10vw; width:60vw; height:60vh; background:radial-gradient(ellipse,rgba(0,229,160,.04) 0%,transparent 70%); pointer-events:none; z-index:0; }

/* ── NAV ── */
nav {
  position: fixed; top:0; left:0; right:0; z-index:999;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 4rem;
  background: rgba(5,12,20,.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
.nav-logo { font-family:'Syne',sans-serif; font-weight:800; font-size:1.1rem; color:var(--white); letter-spacing:-.02em; text-decoration:none; }
.nav-logo span { color:var(--accent); }
.nav-links { display:flex; gap:2.2rem; list-style:none; }
.nav-links a { font-family:'JetBrains Mono',monospace; font-size:.72rem; letter-spacing:.08em; text-transform:uppercase; color:var(--muted); text-decoration:none; transition:color .2s; padding-bottom:2px; border-bottom:1px solid transparent; }
.nav-links a:hover, .nav-links a.active { color:var(--accent); border-bottom-color:var(--accent); }
.nav-menu-btn { display:none; background:none; border:1px solid var(--border); color:var(--muted); padding:.4rem .7rem; border-radius:2px; cursor:pointer; font-size:1rem; }

/* ── PAGE HEADER ── */
.page-header {
  position:relative; z-index:1;
  padding: 9rem 4rem 4rem;
  border-bottom: 1px solid var(--border);
}
.page-header-inner { max-width:1140px; margin:0 auto; }
.page-tag { font-family:'JetBrains Mono',monospace; font-size:.7rem; letter-spacing:.14em; text-transform:uppercase; color:var(--accent); display:flex; align-items:center; gap:.5rem; margin-bottom:.8rem; }
.page-tag::before { content:''; display:block; width:22px; height:1px; background:var(--accent); }
.page-title { font-family:'Syne',sans-serif; font-weight:800; font-size:clamp(2.2rem,4vw,3.8rem); color:var(--white); letter-spacing:-.04em; line-height:1; }

/* ── SECTION ── */
section { position:relative; z-index:1; }
.section-inner { max-width:1140px; margin:0 auto; padding:4rem 4rem; }
.section-tag { font-family:'JetBrains Mono',monospace; font-size:.68rem; letter-spacing:.14em; text-transform:uppercase; color:var(--accent); display:flex; align-items:center; gap:.5rem; margin-bottom:.7rem; }
.section-tag::before { content:''; display:block; width:18px; height:1px; background:var(--accent); }
.section-title { font-family:'Syne',sans-serif; font-weight:700; font-size:clamp(1.5rem,2.5vw,2.2rem); color:var(--white); letter-spacing:-.03em; margin-bottom:2rem; }
.divider { border:none; border-top:1px solid var(--border); }

/* ── BUTTONS ── */
.btn-primary { display:inline-block; padding:.75rem 1.8rem; background:var(--accent); color:var(--bg); font-weight:600; font-size:.85rem; border-radius:2px; text-decoration:none; transition:background .2s,transform .15s; font-family:'DM Sans',sans-serif; }
.btn-primary:hover { background:#00e0f5; transform:translateY(-2px); }
.btn-outline { display:inline-block; padding:.75rem 1.8rem; border:1px solid var(--border); color:var(--text); font-size:.85rem; border-radius:2px; text-decoration:none; transition:border-color .2s,color .2s,transform .15s; font-family:'DM Sans',sans-serif; }
.btn-outline:hover { border-color:var(--accent); color:var(--accent); transform:translateY(-2px); }

/* ── TOOL BADGE ── */
.tool-badge { font-family:'JetBrains Mono',monospace; font-size:.72rem; padding:.3rem .8rem; border:1px solid var(--border); border-radius:2px; color:var(--muted); transition:border-color .2s,color .2s; display:inline-block; }
.tool-badge:hover { border-color:var(--accent); color:var(--accent); }

/* ── FOOTER ── */
footer {
  position:relative; z-index:1;
  background:var(--bg);
  border-top:1px solid var(--border);
  padding:2rem 4rem;
  display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:1rem;
}
.footer-logo { font-family:'Syne',sans-serif; font-weight:800; font-size:.95rem; color:var(--white); }
.footer-logo span { color:var(--accent); }
.footer-copy { font-family:'JetBrains Mono',monospace; font-size:.65rem; color:var(--muted); letter-spacing:.05em; }
.footer-links { display:flex; gap:1.5rem; }
.footer-links a { font-family:'JetBrains Mono',monospace; font-size:.65rem; color:var(--muted); text-decoration:none; letter-spacing:.06em; text-transform:uppercase; transition:color .2s; }
.footer-links a:hover { color:var(--accent); }

/* ── RESPONSIVE ── */
@media (max-width:900px) {
  nav { padding:1rem 1.5rem; }
  .nav-links { display:none; flex-direction:column; position:absolute; top:100%; left:0; right:0; background:rgba(5,12,20,.98); border-bottom:1px solid var(--border); padding:1.5rem; gap:1.2rem; }
  .nav-links.open { display:flex; }
  .nav-menu-btn { display:block; }
  .page-header { padding:7rem 1.5rem 3rem; }
  .section-inner { padding:3rem 1.5rem; }
  footer { padding:1.5rem; }
}

/* ══════════════════════════════════════════════
   FANCY SOCIAL BUTTONS (badge-style)
══════════════════════════════════════════════ */
.social-badges { display:flex; flex-wrap:wrap; gap:.6rem; margin-top:1.2rem; }
.social-badge {
  display:inline-flex; align-items:center; gap:.5rem;
  padding:.45rem 1rem .45rem .65rem;
  border-radius:30px;
  font-family:'JetBrains Mono',monospace;
  font-size:.7rem; letter-spacing:.04em;
  text-decoration:none;
  border:1px solid transparent;
  transition:transform .18s, box-shadow .18s, filter .18s;
  font-weight:500;
  white-space:nowrap;
}
.social-badge:hover { transform:translateY(-2px); box-shadow:0 6px 20px rgba(0,0,0,.35); filter:brightness(1.1); }
.social-badge svg, .social-badge .b-icon { width:16px; height:16px; fill:currentColor; flex-shrink:0; }
.social-badge .b-label { font-size:.68rem; }

.badge-scholar  { background:#4285f4; color:#fff; border-color:rgba(255,255,255,.15); }
.badge-rg       { background:#00ccbb; color:#fff; border-color:rgba(255,255,255,.15); }
.badge-linkedin { background:#0a66c2; color:#fff; border-color:rgba(255,255,255,.15); }
.badge-orcid    { background:#a6ce39; color:#1a1a1a; border-color:rgba(0,0,0,.1); }
.badge-github   { background:#24292e; color:#fff; border-color:rgba(255,255,255,.15); }
.badge-twitter  { background:#000; color:#fff; border-color:rgba(255,255,255,.12); }

/* ── BLOG CARDS ── */
.blog-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:1.4rem; }
.blog-card {
  border:1px solid var(--border); border-radius:6px;
  background:var(--bg2); overflow:hidden;
  display:flex; flex-direction:column;
  transition:border-color .25s, transform .22s, box-shadow .22s;
  text-decoration:none;
}
.blog-card:hover { border-color:var(--accent); transform:translateY(-5px); box-shadow:0 12px 40px rgba(0,200,220,.1); }
.blog-card-top { padding:1.5rem 1.5rem .8rem; flex:1; }
.blog-card-meta { display:flex; justify-content:space-between; align-items:center; margin-bottom:1rem; }
.blog-date { font-family:'JetBrains Mono',monospace; font-size:.65rem; color:var(--muted); }
.blog-read-time {
  font-family:'JetBrains Mono',monospace; font-size:.62rem;
  padding:.2rem .55rem; border-radius:20px;
  background:rgba(0,200,220,.1); color:var(--accent); border:1px solid rgba(0,200,220,.2);
}
.blog-tags { display:flex; flex-wrap:wrap; gap:.4rem; margin-bottom:.9rem; }
.blog-tag {
  font-family:'JetBrains Mono',monospace; font-size:.62rem; letter-spacing:.04em;
  padding:.18rem .6rem; border-radius:20px;
  background:rgba(0,200,220,.06); color:var(--muted); border:1px solid var(--border);
}
.blog-card-title { font-family:'Syne',sans-serif; font-weight:700; font-size:1rem; color:var(--white); line-height:1.35; margin-bottom:.6rem; }
.blog-card-excerpt { font-size:.84rem; color:var(--muted); line-height:1.65; }
.blog-card-footer {
  padding:.9rem 1.5rem; border-top:1px solid var(--border);
  display:flex; align-items:center; justify-content:space-between;
}
.blog-author { display:flex; align-items:center; gap:.6rem; }
.blog-avatar { width:28px; height:28px; border-radius:50%; background:var(--accent); display:flex; align-items:center; justify-content:center; font-family:'Syne',sans-serif; font-weight:800; font-size:.65rem; color:var(--bg); flex-shrink:0; }
.blog-author-name { font-size:.8rem; color:var(--muted); }
.blog-read-link { font-family:'JetBrains Mono',monospace; font-size:.68rem; color:var(--accent); display:flex; align-items:center; gap:.3rem; transition:gap .15s; }
.blog-card:hover .blog-read-link { gap:.55rem; }

/* ── BLOG POST PAGE ── */
.blog-post-header { padding:9rem 4rem 3rem; }
.blog-post-inner { max-width:740px; margin:0 auto; padding:3rem 4rem 5rem; }
.blog-post-inner h2 { font-family:'Syne',sans-serif; font-weight:700; font-size:1.3rem; color:var(--white); margin:2rem 0 .7rem; }
.blog-post-inner p { font-size:.95rem; color:var(--text); line-height:1.85; margin-bottom:1.2rem; opacity:.9; }
.blog-post-inner ul, .blog-post-inner ol { margin:0 0 1.2rem 1.5rem; }
.blog-post-inner li { font-size:.93rem; color:var(--text); line-height:1.8; opacity:.88; }
.blog-callout { border-left:3px solid var(--accent); padding:.8rem 1.2rem; background:rgba(0,200,220,.05); border-radius:0 4px 4px 0; margin:1.5rem 0; font-size:.9rem; color:var(--text); }

@media(max-width:900px) { .blog-grid { grid-template-columns:1fr 1fr; } }
@media(max-width:600px) { .blog-grid { grid-template-columns:1fr; } }

.filter-btn { font-family:'JetBrains Mono',monospace; font-size:.7rem; letter-spacing:.08em; text-transform:uppercase; padding:.45rem 1.1rem; border-radius:2px; cursor:pointer; border:1px solid var(--border); background:transparent; color:var(--muted); transition:all .2s; }
.filter-btn.active, .filter-btn:hover { border-color:var(--accent); color:var(--accent); background:rgba(0,200,220,.06); }