:root{
  --bg:#07070d;
  --bg-2:#0b0b16;
  --fg:#e8ecf8;
  --muted:#9aa3bf;
  --line:rgba(255,255,255,.08);
  --cyan:#00e5ff;
  --violet:#a855f7;
  --pink:#ff4ecd;
  --grad: linear-gradient(120deg,#00e5ff 0%,#a855f7 55%,#ff4ecd 100%);
  --grad2: linear-gradient(120deg,#7cf9ff,#c084fc);
  --card: rgba(255,255,255,.03);
  --card-bd: rgba(255,255,255,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: "Inter","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background: radial-gradient(1200px 800px at 80% -10%, rgba(168,85,247,.18), transparent 60%),
              radial-gradient(1000px 700px at -10% 30%, rgba(0,229,255,.14), transparent 60%),
              var(--bg);
  color:var(--fg);
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
canvas#bg{position:fixed;inset:0;z-index:0;opacity:.55}
.grid-overlay{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(1200px 700px at 50% 10%, #000 30%, transparent 75%);
}

/* nav */
.nav{
  position:sticky;top:0;z-index:10;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 44px;
  backdrop-filter: blur(14px);
  background: linear-gradient(180deg, rgba(7,7,13,.75), rgba(7,7,13,.25));
  border-bottom:1px solid var(--line);
}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--fg);font-weight:700;letter-spacing:.3px}
.logo b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo-mark{
  width:26px;height:26px;border-radius:8px;
  background: conic-gradient(from 210deg,#00e5ff,#a855f7,#ff4ecd,#00e5ff);
  box-shadow: 0 0 24px rgba(168,85,247,.55), inset 0 0 10px rgba(255,255,255,.35);
  animation: spin 8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.nav nav{display:flex;gap:26px}
.nav nav a{color:var(--muted);text-decoration:none;font-size:14px;transition:color .2s}
.nav nav a:hover{color:var(--fg)}
.nav-right{display:flex;align-items:center;gap:14px}
.cta{
  text-decoration:none;color:#0b0b16;font-weight:700;font-size:14px;
  padding:10px 16px;border-radius:999px;background:var(--grad);
  box-shadow: 0 10px 30px -10px rgba(168,85,247,.6);
  transition: transform .15s ease;
}
.cta:hover{transform:translateY(-1px)}

/* hamburger */
.hamburger{
  display:none;background:none;border:none;cursor:pointer;
  width:36px;height:36px;padding:6px;
  flex-direction:column;justify-content:center;gap:5px;
}
.hamburger span{
  display:block;height:2px;width:100%;border-radius:2px;
  background:var(--fg);transition:transform .3s,opacity .2s;
}
.hamburger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger[aria-expanded="true"] span:nth-child(2){opacity:0}
.hamburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* mobile menu overlay */
.mobile-menu{
  position:fixed;inset:0;z-index:9;
  background:rgba(7,7,13,.92);backdrop-filter:blur(20px);
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .3s ease,visibility .3s ease;
}
.mobile-menu.open{opacity:1;visibility:visible;pointer-events:auto}
.mobile-menu nav{display:flex;flex-direction:column;align-items:center;gap:28px}
.mobile-menu nav a{
  color:var(--fg);text-decoration:none;font-size:24px;font-weight:600;
  opacity:0;transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,color .2s;
}
.mobile-menu.open nav a{opacity:1;transform:none}
.mobile-menu.open nav a:nth-child(1){transition-delay:.05s}
.mobile-menu.open nav a:nth-child(2){transition-delay:.1s}
.mobile-menu.open nav a:nth-child(3){transition-delay:.15s}
.mobile-menu.open nav a:nth-child(4){transition-delay:.2s}
.mobile-menu.open nav a:nth-child(5){transition-delay:.25s}
.mobile-menu nav a:hover{color:var(--cyan)}

/* layout */
main{position:relative;z-index:1;max-width:1180px;margin:0 auto;padding:0 28px}
.section{padding:96px 0;position:relative}
.section-title{
  font-size:32px;letter-spacing:.3px;margin:0 0 32px;
  background: var(--grad2);-webkit-background-clip:text;background-clip:text;color:transparent;
}

/* hero */
.hero{padding:110px 0 60px;text-align:left}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border:1px solid var(--card-bd);border-radius:999px;
  color:var(--muted);font-size:12.5px;background:rgba(255,255,255,.02);
}
.badge .dot{width:8px;height:8px;border-radius:50%;background:#00e5ff;box-shadow:0 0 12px #00e5ff}
h1{
  font-size: clamp(44px, 7vw, 88px);
  line-height:1.02;margin:22px 0 20px;letter-spacing:-.02em;font-weight:800;
}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.grad2{background:var(--grad2);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{color:var(--muted);font-size:18px;max-width:720px;line-height:1.7}
.lede.center{text-align:center;margin:0 auto}
.hero-actions{display:flex;gap:14px;margin:32px 0 44px;flex-wrap:wrap}
.btn{
  text-decoration:none;padding:14px 22px;border-radius:12px;font-weight:600;font-size:15px;
  transition: transform .15s ease, box-shadow .2s ease, background .2s;
}
.btn.primary{color:#0b0b16;background:var(--grad);box-shadow:0 14px 40px -14px rgba(0,229,255,.55)}
.btn.primary:hover{transform:translateY(-2px)}
.btn.ghost{color:var(--fg);border:1px solid var(--card-bd);background:rgba(255,255,255,.02)}
.btn.ghost:hover{background:rgba(255,255,255,.06)}
.stats{display:flex;gap:44px;flex-wrap:wrap;margin-top:12px}
.stats>div{display:flex;flex-direction:column}
.stats b{font-size:28px;background:var(--grad2);-webkit-background-clip:text;background-clip:text;color:transparent}
.stats span{color:var(--muted);font-size:13px;margin-top:4px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{
  position:relative;padding:22px;border-radius:16px;
  background:var(--card);border:1px solid var(--card-bd);
  transition: transform .2s ease, border-color .2s;
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:-1px;border-radius:16px;
  background: linear-gradient(120deg, transparent, rgba(168,85,247,.35), transparent);
  opacity:0;transition:opacity .3s;z-index:0;
}
.card:hover{transform:translateY(-4px);border-color:rgba(168,85,247,.35)}
.card:hover::before{opacity:.6}
.card>*{position:relative;z-index:1}
.card h3{margin:14px 0 8px;font-size:17px}
.card p{color:var(--muted);font-size:14px;line-height:1.6;margin:0}
.icon{width:38px;height:38px;border-radius:10px;background:var(--grad);opacity:.9;box-shadow:0 8px 24px -8px rgba(0,229,255,.6)}
.i2{background: conic-gradient(from 120deg,#00e5ff,#a855f7,#00e5ff)}
.i3{background: linear-gradient(135deg,#a855f7,#ff4ecd)}
.i4{background: linear-gradient(135deg,#7cf9ff,#a855f7)}

/* posts */
.posts{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.post{
  display:block;padding:22px;border-radius:16px;text-decoration:none;color:var(--fg);
  background:var(--card);border:1px solid var(--card-bd);
  transition: transform .2s, border-color .2s, background .2s;
}
.post:hover{transform:translateY(-3px);border-color:rgba(0,229,255,.35);background:rgba(0,229,255,.04)}
.post h3{margin:12px 0 8px;font-size:19px;line-height:1.35}
.post p{color:var(--muted);font-size:14px;margin:0 0 14px}
.tag{
  display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;
  color:#0b0b16;background:var(--grad2);font-weight:700;letter-spacing:.3px
}
.meta{color:#7cf9ff;font-size:13px}

/* projects */
.projects{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.proj{padding:22px;border-radius:16px;background:var(--card);border:1px solid var(--card-bd)}
.proj h3{margin:0 0 8px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.proj p{color:var(--muted);font-size:14px;line-height:1.6}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chips span{
  font-size:12px;padding:4px 10px;border-radius:999px;
  border:1px solid var(--card-bd);color:var(--muted);background:rgba(255,255,255,.02)
}

/* contact */
.contact{text-align:center}
.socials{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:28px}
.socials a{
  padding:18px;border-radius:14px;text-decoration:none;
  background:var(--card);border:1px solid var(--card-bd);
  display:flex;flex-direction:column;gap:6px;transition:transform .2s,border-color .2s;
}
.socials a:hover{transform:translateY(-3px);border-color:rgba(255,78,205,.4)}
.socials span{color:var(--muted);font-size:12.5px}
.socials b{color:var(--fg);font-size:14px}

/* footer */
footer{
  position:relative;z-index:1;
  border-top:1px solid var(--line);margin-top:60px;padding:26px 44px;
  display:flex;justify-content:space-between;color:var(--muted);font-size:13px;
}
.foot-links a{color:var(--muted);text-decoration:none;margin-left:14px}
.foot-links a:hover{color:var(--fg)}

/* responsive */
@media (max-width: 960px){
  .nav{padding:14px 20px}
  .nav nav{display:none}
  .cta{display:none}
  .hamburger{display:flex}
  .cards{grid-template-columns:repeat(2,1fr)}
  .posts{grid-template-columns:1fr}
  .projects{grid-template-columns:1fr}
  .socials{grid-template-columns:repeat(2,1fr)}
  footer{padding:20px}
}

/* now / learning cards */
.now-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.now-card{
  padding:22px;border-radius:16px;
  background:var(--card);border:1px solid var(--card-bd);
  transition:transform .2s, border-color .2s;
}
.now-card:hover{transform:translateY(-3px);border-color:rgba(0,229,255,.35)}
.now-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.now-card h3{margin:6px 0 8px;font-size:17px}
.now-card p{color:var(--muted);font-size:14px;line-height:1.65;margin:0 0 16px}
.pill{
  display:inline-block;padding:3px 10px;border-radius:999px;font-size:11.5px;font-weight:700;
  border:1px solid var(--card-bd);color:var(--muted);background:rgba(255,255,255,.03);
  letter-spacing:.4px;
}
.pill.live{color:#0b0b16;background:var(--grad);border-color:transparent}
.date{color:var(--muted);font-size:12px}
.progress{height:6px;border-radius:999px;background:rgba(255,255,255,.06);overflow:hidden}
.progress>span{display:block;height:100%;background:var(--grad);box-shadow:0 0 12px rgba(0,229,255,.5)}

/* book shelf */
.books{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.book{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  padding:18px 14px;border-radius:14px;
  background:var(--card);border:1px solid var(--card-bd);
  transition:transform .2s,border-color .2s;text-align:center;
}
.book:hover{transform:translateY(-3px);border-color:rgba(168,85,247,.4)}
.book b{font-size:14px;color:var(--fg)}
.book span{font-size:12px;color:var(--muted)}
.cover{
  width:100%;aspect-ratio: 2 / 3;border-radius:10px;
  box-shadow:inset 0 0 30px rgba(0,0,0,.35), 0 12px 30px -14px rgba(0,0,0,.6);
  position:relative;overflow:hidden;
}
.cover::after{
  content:"";position:absolute;left:8%;top:0;bottom:0;width:2px;
  background:rgba(0,0,0,.35);
}
.c1{background:linear-gradient(135deg,#0f172a,#1e293b 60%,#0ea5e9)}
.c2{background:linear-gradient(135deg,#1a1b3a,#4c1d95 60%,#a855f7)}
.c3{background:linear-gradient(135deg,#3b0764,#7c3aed 60%,#ff4ecd)}
.c4{background:linear-gradient(135deg,#0b3d2e,#059669 60%,#a7f3d0)}
.c5{background:linear-gradient(135deg,#1a1a1a,#374151 60%,#9ca3af)}

@media (max-width: 960px){
  .now-grid{grid-template-columns:1fr}
  .books{grid-template-columns:repeat(2,1fr)}
}

/* about section socials override to 4 columns */
.about .socials{grid-template-columns:repeat(4,1fr)}
@media (max-width: 960px){ .about .socials{grid-template-columns:repeat(2,1fr)} }

/* subtle entrance */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .8s ease, transform .8s ease}
.reveal.show{opacity:1;transform:none}