/* ============================================================
   DIGITAL NEO — a neon/cyber theme for AI4Good
   ============================================================ */

:root{
  --bg:#05060b;
  --bg-2:#080b14;
  --panel:rgba(13,19,33,.55);
  --border:rgba(120,160,255,.16);
  --border-strong:rgba(130,180,255,.38);
  --text:#e8f0ff;
  --muted:#93a4c6;
  --cyan:#22e0ff;
  --magenta:#ff36d0;
  --violet:#9b6bff;
  --grad:linear-gradient(90deg,var(--cyan),var(--violet) 45%,var(--magenta));
  --radius:16px;
  --wrap:1080px;
  --mono:'JetBrains Mono',ui-monospace,'Courier New',monospace;
  --sans:'Inter',system-ui,-apple-system,sans-serif;
  --display:'Space Grotesk',var(--sans);
  --brandfont:'Orbitron',var(--display);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:var(--cyan);text-decoration:none}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 22px}

/* ---------- animated background ---------- */
.bg-fx{
  position:fixed;inset:0;z-index:-1;overflow:hidden;
  background:
    radial-gradient(1200px 800px at 12% -10%, rgba(34,224,255,.10), transparent 60%),
    radial-gradient(1000px 700px at 100% 0%, rgba(255,54,208,.10), transparent 55%),
    linear-gradient(180deg,var(--bg),var(--bg-2));
}
.grid{
  position:absolute;inset:-2px;
  background-image:
    linear-gradient(rgba(120,160,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,.05) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(circle at 50% 25%,#000 0%,transparent 78%);
  mask-image:radial-gradient(circle at 50% 25%,#000 0%,transparent 78%);
}
.blob{
  position:absolute;width:520px;height:520px;border-radius:50%;
  filter:blur(80px);opacity:.35;animation:float 18s ease-in-out infinite;
}
.blob-1{background:radial-gradient(circle,var(--cyan),transparent 65%);top:-120px;left:-80px}
.blob-2{background:radial-gradient(circle,var(--magenta),transparent 65%);bottom:-160px;right:-100px;animation-delay:-9s}
.scanline{
  position:absolute;inset:0;opacity:.22;mix-blend-mode:overlay;
  background:repeating-linear-gradient(0deg,transparent 0 3px,rgba(0,0,0,.18) 3px 4px);
}
@keyframes float{0%,100%{transform:translate(0,0)}50%{transform:translate(40px,30px)}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(14px);background:rgba(6,9,17,.6);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--brandfont);font-weight:800;letter-spacing:2px;font-size:18px;color:var(--text)}
.brand-mark{color:var(--cyan);filter:drop-shadow(0 0 8px var(--cyan))}
.brand .accent{color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text}
.site-nav{display:flex;gap:6px}
.nav-link{
  font-family:var(--mono);font-size:13px;text-transform:uppercase;letter-spacing:1px;
  color:var(--muted);padding:8px 12px;border-radius:10px;border:1px solid transparent;transition:.2s;
}
.nav-link:hover{color:var(--text);border-color:var(--border);box-shadow:inset 0 0 18px rgba(34,224,255,.15)}
.nav-link.active{color:var(--text);border-color:var(--border-strong);background:rgba(34,224,255,.06)}

.site-main{padding:56px 22px 40px;min-height:60vh}

/* ---------- hero ---------- */
.hero{text-align:center;padding:56px 0 30px}
.kicker{
  display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:3px;text-transform:uppercase;
  color:var(--cyan);border:1px solid var(--border-strong);padding:6px 14px;border-radius:999px;
  background:rgba(34,224,255,.05);box-shadow:0 0 24px rgba(34,224,255,.12);
}
.hero-title{
  font-family:var(--display);font-weight:700;font-size:clamp(38px,7vw,74px);line-height:1.02;
  margin:22px auto 14px;max-width:14ch;letter-spacing:-1px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 60px rgba(155,107,255,.25);
}
.hero-sub{max-width:640px;margin:0 auto;color:var(--muted);font-size:clamp(16px,2.2vw,19px)}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:28px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:14px;letter-spacing:.5px;
  padding:12px 20px;border-radius:12px;border:1px solid var(--border-strong);transition:.2s;cursor:pointer;
}
.btn-primary{color:#04121a;background:var(--grad);border:none;font-weight:700;box-shadow:0 0 26px rgba(34,224,255,.35)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 8px 34px rgba(255,54,208,.4)}
.btn-ghost{color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 22px rgba(34,224,255,.2);transform:translateY(-2px)}

/* ---------- sections / glass ---------- */
.glass{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);backdrop-filter:blur(10px)}
.intro{padding:20px 24px;margin:8px 0 44px;color:var(--muted)}
.intro strong{color:var(--text)}
.intro p{margin:0}
.section-title{font-family:var(--display);font-size:22px;letter-spacing:.5px;margin:10px 0 22px;color:var(--text)}
.section-title .hash{color:var(--magenta);filter:drop-shadow(0 0 8px var(--magenta))}

/* ---------- post grid / cards ---------- */
.post-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.card{position:relative;border-radius:var(--radius);border:1px solid var(--border);background:var(--panel);backdrop-filter:blur(10px);overflow:hidden;transition:.25s}
.card::before{
  content:'';position:absolute;inset:0;padding:1px;border-radius:inherit;background:var(--grad);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:.25s;pointer-events:none;
}
.card:hover{transform:translateY(-4px);border-color:transparent;box-shadow:0 12px 40px rgba(34,224,255,.14)}
.card:hover::before{opacity:1}
.card-link{display:block;padding:22px;color:inherit}
.card-media{display:block;height:190px;margin:-22px -22px 6px;background-size:cover;background-position:50% 14%;position:relative;transition:transform .35s ease}
.card-media::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,6,11,0) 30%,rgba(5,6,11,.55) 66%,var(--bg) 100%)}
.card:hover .card-media{transform:scale(1.05)}
.card.has-media .card-top{position:relative;z-index:1;margin-top:-32px}
.card-top{display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.5px}
.card-cat{color:var(--cyan);text-transform:uppercase}
.card-title{font-family:var(--display);font-size:20px;line-height:1.25;margin:12px 0 8px;color:var(--text);transition:.2s}
.card:hover .card-title{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.card-excerpt{color:var(--muted);font-size:14.5px;margin:0 0 14px}
.card-more{font-family:var(--mono);font-size:13px;color:var(--cyan)}

/* ---------- chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 14px}
.chip{font-family:var(--mono);font-size:11px;letter-spacing:.5px;color:var(--muted);border:1px solid var(--border);padding:4px 10px;border-radius:999px;background:rgba(255,255,255,.02)}

/* ---------- post / page ---------- */
.post,.page-doc{max-width:820px;margin:0 auto}
.post-header{margin-bottom:34px;padding-bottom:26px;border-bottom:1px solid var(--border)}
.post-meta{font-family:var(--mono);font-size:13px;color:var(--muted);display:flex;gap:10px;align-items:center}
.post-meta .dot{color:var(--magenta)}
.post-title,.page-title{
  font-family:var(--display);font-weight:700;font-size:clamp(30px,5vw,46px);line-height:1.08;letter-spacing:-.5px;margin:14px 0 12px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.post-lede{color:var(--muted);font-size:18px;margin:0 0 14px}
.page-head{margin-bottom:22px}

/* ---------- markdown content typography ---------- */
.content{font-size:16.5px}
.content h2{font-family:var(--display);font-size:26px;margin:38px 0 14px;padding-left:14px;border-left:3px solid var(--cyan);box-shadow:-1px 0 20px rgba(34,224,255,.22);color:var(--text)}
.content h3{font-family:var(--display);font-size:20px;margin:26px 0 10px;color:var(--text)}
.content h4{font-family:var(--mono);text-transform:uppercase;letter-spacing:1px;font-size:14px;color:var(--cyan);margin:22px 0 8px}
.content p{margin:14px 0}
.content a{color:var(--cyan);border-bottom:1px solid rgba(34,224,255,.35)}
.content a:hover{color:#fff;background:rgba(34,224,255,.12);border-bottom-color:var(--cyan)}
.content ul,.content ol{padding-left:22px}
.content li{margin:6px 0}
.content li::marker{color:var(--magenta)}
.content strong{color:#fff}
.content hr{border:none;height:1px;background:var(--grad);opacity:.5;margin:34px 0}
.content blockquote{margin:22px 0;padding:14px 20px;border-left:3px solid var(--magenta);background:rgba(255,54,208,.06);border-radius:0 12px 12px 0;color:var(--muted)}
.content blockquote strong{color:var(--magenta)}
.content code{font-family:var(--mono);font-size:.9em;background:rgba(120,160,255,.1);border:1px solid var(--border);padding:2px 6px;border-radius:6px;color:#bfe8ff}
.content pre{position:relative;background:#070b15;border:1px solid var(--border);border-radius:14px;padding:18px;overflow-x:auto;box-shadow:0 0 30px rgba(0,0,0,.4)}
.content pre code{background:none;border:none;padding:0;color:#d6e6ff;font-size:13.5px;line-height:1.6}
.content pre::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:.7}
.content img{max-width:100%;border-radius:12px;border:1px solid var(--border)}

/* ---------- tables ---------- */
.content table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14px;border:1px solid var(--border);border-radius:12px;overflow:hidden}
.content thead th{background:linear-gradient(90deg,rgba(34,224,255,.12),rgba(255,54,208,.12));font-family:var(--mono);text-transform:uppercase;letter-spacing:.5px;font-size:12px;color:var(--text);text-align:left;padding:12px 14px}
.content tbody td{padding:11px 14px;border-top:1px solid var(--border);color:var(--muted)}
.content tbody tr:hover td{background:rgba(120,160,255,.05);color:var(--text)}

.post-footer{margin-top:40px;padding-top:24px;border-top:1px solid var(--border)}

/* ---------- footer ---------- */
.site-footer{margin-top:60px;border-top:1px solid var(--border);background:rgba(6,9,17,.5);backdrop-filter:blur(10px)}
.footer-inner{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;padding-top:26px;padding-bottom:8px}
.foot-brand{font-family:var(--brandfont);letter-spacing:2px;color:var(--cyan)}
.foot-meta{color:var(--muted);font-size:14px;flex:1;min-width:200px;text-align:center}
.foot-links{display:flex;gap:16px}
.foot-links a{font-family:var(--mono);font-size:13px;color:var(--muted)}
.foot-links a:hover{color:var(--cyan)}
.foot-copy{color:#5b6b8c;font-family:var(--mono);font-size:12px;padding-bottom:26px}

/* ---------- misc ---------- */
::selection{background:rgba(255,54,208,.35);color:#fff}
::-webkit-scrollbar{width:12px;height:12px}
::-webkit-scrollbar-track{background:var(--bg-2)}
::-webkit-scrollbar-thumb{background:linear-gradient(var(--cyan),var(--violet));border-radius:10px;border:3px solid var(--bg-2)}

@media (max-width:640px){
  .header-inner{height:auto;flex-direction:column;gap:8px;padding:12px 0}
  .site-nav{flex-wrap:wrap;justify-content:center}
  .foot-meta{order:3;text-align:left}
  .content table{display:block;overflow-x:auto;white-space:nowrap}
}
@media (prefers-reduced-motion:reduce){.blob{animation:none}html{scroll-behavior:auto}}