/* ===== Theme ===== */
:root {
  --bg: #050505;
  --bg-2: #0e0e10;
  --card: rgba(255, 255, 255, 0.035);
  --card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --text: #f4f4f5;
  --muted: #8b8b93;
  --accent: #ffffff;
  --accent-2: #a1a1aa;
  --accent-3: #52525b;
  --radius: 18px;
  --max: 1120px;
  --font: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ===== Animated background ===== */
.bg-glow { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.bg-glow span {
  position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.06;
  animation: float 22s ease-in-out infinite alternate;
}
.bg-glow span:nth-child(1) { width: 520px; height: 520px; background: var(--accent); top: -160px; left: -120px; }
.bg-glow span:nth-child(2) { width: 460px; height: 460px; background: var(--accent-2); bottom: -180px; right: -100px; animation-delay: -7s; }
.bg-glow span:nth-child(3) { width: 340px; height: 340px; background: var(--accent-3); top: 40%; left: 55%; opacity: 0.18; animation-delay: -14s; }
.bg-grid {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}
@keyframes float {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(80px, 60px) scale(1.15); }
}

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(5, 5, 5, 0.6);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 14px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.logo { font-family: var(--mono); font-weight: 700; font-size: 1.1rem; letter-spacing: -0.02em; }
.logo .dot { color: var(--accent); }
.tabs { display: flex; gap: 4px; padding: 4px; border: 1px solid var(--border); border-radius: 999px; background: var(--card); }
.tabs a {
  padding: 7px 16px; border-radius: 999px; font-size: 0.92rem; color: var(--muted);
  transition: color .2s, background .2s;
}
.tabs a:hover { color: var(--text); }
.tabs a.active { color: #050505; background: #fff; font-weight: 600; }

/* ===== Layout ===== */
main { flex: 1; width: 100%; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
section { padding: 72px 0; }
.eyebrow {
  font-family: var(--mono); font-size: 0.8rem; color: var(--muted);
  letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 12px;
}
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 14px; }
.lead { color: var(--muted); font-size: 1.08rem; max-width: 640px; }
.gradient-text {
  background: linear-gradient(180deg, #ffffff 20%, #71717a 120%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ===== Hero ===== */
.hero {
  min-height: calc(100vh - 66px);
  display: flex; align-items: center; justify-content: center; text-align: center;
  padding: 40px 16px;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--card); color: var(--muted); font-size: 0.85rem; margin-bottom: 28px;
}
.hero-badge .pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-3); box-shadow: 0 0 0 0 rgba(255,255,255,.6); animation: pulse 2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px rgba(255,255,255,0); } 100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); } }
.hero h1 { font-size: clamp(3rem, 10vw, 6.5rem); font-weight: 800; letter-spacing: -0.05em; }
.hero h1 .wave { display: inline-block; animation: wave 2.4s ease-in-out infinite; transform-origin: 70% 70%; }
@keyframes wave { 0%,60%,100% { transform: rotate(0); } 10%,30% { transform: rotate(14deg); } 20% { transform: rotate(-8deg); } 40% { transform: rotate(-4deg); } 50% { transform: rotate(10deg); } }
.typing-line {
  margin-top: 18px; font-size: clamp(1.3rem, 4vw, 2.2rem); font-weight: 500; color: var(--muted);
  min-height: 1.4em;
}
.typed { font-family: var(--mono); font-weight: 600; }
.cursor {
  display: inline-block; width: 3px; height: 1.05em; margin-left: 4px; vertical-align: -0.12em;
  background: var(--accent); border-radius: 2px; animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.socials { display: flex; justify-content: center; gap: 14px; margin-top: 44px; flex-wrap: wrap; }
.social {
  width: 54px; height: 54px; border-radius: 16px; display: grid; place-items: center;
  border: 1px solid var(--border); background: var(--card); color: var(--muted);
  transition: transform .25s, color .25s, border-color .25s, background .25s, box-shadow .25s;
}
.social svg { width: 22px; height: 22px; fill: currentColor; }
.social:hover {
  transform: translateY(-4px); color: var(--text); border-color: rgba(255,255,255,.5);
  background: var(--card-hover); box-shadow: 0 10px 30px -10px rgba(255,255,255,.5);
}
.hero-cta { display: flex; gap: 12px; justify-content: center; margin-top: 36px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 12px;
  font-weight: 600; font-size: 0.95rem; transition: transform .2s, box-shadow .2s, background .2s;
  border: 1px solid var(--border);
}
.btn svg { width: 16px; height: 16px; fill: currentColor; }
.btn-primary { background: #fff; color: #050505; border: none; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -10px rgba(255,255,255,.6); }
.btn-ghost { background: var(--card); color: var(--text); }
.btn-ghost:hover { background: var(--card-hover); transform: translateY(-2px); }

.scroll-hint { margin-top: 64px; color: var(--muted); font-size: .8rem; font-family: var(--mono); opacity: .7; }

/* ===== Page header ===== */
.page-head { padding: 88px 0 24px; }
.page-head h1 { font-size: clamp(2.4rem, 7vw, 4.2rem); font-weight: 800; margin-bottom: 16px; }

/* ===== Cards ===== */
.grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.card {
  position: relative; padding: 26px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--card);
  transition: transform .25s, border-color .25s, background .25s;
  display: flex; flex-direction: column; gap: 12px;
}
.card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,.35); background: var(--card-hover); }
.card h3 { font-size: 1.2rem; }
.card p { color: var(--muted); font-size: 0.95rem; flex: 1; }
.card-icon {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-family: var(--mono); font-size: .85rem; color: var(--muted);
  background: linear-gradient(135deg, rgba(255,255,255,.18), rgba(255,255,255,.18));
  border: 1px solid var(--border);
}
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-family: var(--mono); font-size: 0.72rem; padding: 3px 9px; border-radius: 999px;
  color: #d4d4d8; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
}
.tag.alt { color: #a1a1aa; background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.2); }
.tag.pink { color: #a1a1aa; background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.2); }
.card-link { display: inline-flex; align-items: center; gap: 6px; font-size: .9rem; color: var(--text); font-weight: 600; }
.card-link svg { width: 16px; height: 16px; fill: currentColor; }
.card-link:hover { color: var(--accent); }

.feature {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 28px; align-items: center;
  padding: 32px; border-radius: 24px; border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.05));
}
.feature + .feature { margin-top: 20px; }
.feature h3 { font-size: 1.6rem; margin-bottom: 10px; }
.feature p { color: var(--muted); margin-bottom: 16px; }
.code {
  font-family: var(--mono); font-size: .85rem; background: #000; border: 1px solid var(--border);
  border-radius: 14px; padding: 20px; overflow-x: auto; color: #c9d1e6; line-height: 1.7;
}
.code .c { color: #52525b; } .code .k { color: #fff; font-weight: 700; } .code .s { color: #a1a1aa; } .code .f { color: #d4d4d8; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 40px; }
.stat { padding: 20px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card); }
.stat b { display: block; font-size: 2rem; letter-spacing: -0.03em; }
.stat span { color: var(--muted); font-size: .85rem; }

/* Skills */
.skills { display: flex; flex-wrap: wrap; gap: 10px; }
.skill { padding: 9px 16px; border-radius: 12px; border: 1px solid var(--border); background: var(--card); font-size: .92rem; }

/* Publications */
.pub { padding: 22px 0; border-bottom: 1px solid var(--border); display: grid; grid-template-columns: 80px 1fr; gap: 18px; }
.pub:first-child { border-top: 1px solid var(--border); }
.pub .year { font-family: var(--mono); color: var(--muted); }
.pub h4 { font-size: 1.05rem; margin-bottom: 4px; }
.pub p { color: var(--muted); font-size: .92rem; }
.placeholder-note { color: var(--muted); font-size: .85rem; font-style: italic; }

/* ===== YouTube ===== */
.channel {
  display: flex; align-items: center; gap: 22px; padding: 26px; border-radius: 24px;
  border: 1px solid var(--border); background: var(--card); flex-wrap: wrap;
}
.channel-avatar {
  width: 84px; height: 84px; border-radius: 50%; flex-shrink: 0;
  background: #fff; color: #000 !important; display: grid; place-items: center;
  font-size: 2rem; font-weight: 800; color: #fff;
}
.channel-info { flex: 1; min-width: 200px; }
.channel-info h3 { font-size: 1.4rem; }
.channel-info p { color: var(--muted); font-size: .95rem; }
.btn-yt { background: #ff0033; color: #fff; border: none; }
.btn-yt:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -10px rgba(255,0,51,.6); }

.featured-video { margin-top: 28px; }
.video-frame {
  position: relative; aspect-ratio: 16/9; border-radius: 20px; overflow: hidden;
  border: 1px solid var(--border); background: var(--bg-2);
}
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.thumb-ph {
  position: absolute; inset: 0; display: grid; place-items: center;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,.25), transparent 55%),
    radial-gradient(circle at 75% 70%, rgba(255,255,255,.22), transparent 55%),
    var(--bg-2);
}
.play {
  width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2); backdrop-filter: blur(6px);
  transition: transform .25s, background .25s;
}
.play svg { width: 24px; height: 24px; fill: #fff; margin-left: 3px; }
.ph-label { position: absolute; bottom: 14px; left: 14px; font-family: var(--mono); font-size: .72rem; color: var(--muted); }

.filters { display: flex; gap: 8px; flex-wrap: wrap; margin: 28px 0 22px; }
.filter {
  padding: 7px 16px; border-radius: 999px; border: 1px solid var(--border); background: var(--card);
  color: var(--muted); font: inherit; font-size: .88rem; cursor: pointer; transition: all .2s;
}
.filter:hover { color: var(--text); }
.filter.active { color: #050505; background: var(--text); border-color: var(--text); font-weight: 600; }

.video-card { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: var(--card); transition: transform .25s, border-color .25s; display: block; }
.video-card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,.35); }
.video-card:hover .play { transform: scale(1.1); background: #ff0033; border-color: #ff0033; }
.video-thumb { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.video-thumb img { width: 100%; height: 100%; object-fit: cover; }
.video-thumb .duration {
  position: absolute; right: 10px; bottom: 10px; font-family: var(--mono); font-size: .72rem;
  background: rgba(0,0,0,.75); padding: 2px 7px; border-radius: 6px;
}
.video-body { padding: 16px 18px 20px; }
.video-body h3 { font-size: 1.02rem; margin: 8px 0 4px; letter-spacing: -0.01em; }
.video-body p { color: var(--muted); font-size: .85rem; }

/* ===== Footer ===== */
footer { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: .85rem; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-inner .socials { margin: 0; gap: 8px; }
.footer-inner .social { width: 38px; height: 38px; border-radius: 10px; }
.footer-inner .social svg { width: 16px; height: 16px; }

/* ===== Reveal on scroll ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 820px) {
  .feature { grid-template-columns: 1fr; padding: 22px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .nav-inner { flex-direction: column; gap: 10px; padding: 10px 16px; }
  .tabs a { padding: 6px 12px; font-size: .85rem; }
  .hero { min-height: calc(100vh - 100px); }
  .grid { grid-template-columns: 1fr; }
  .pub { grid-template-columns: 1fr; gap: 4px; }
  section { padding: 52px 0; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* =========================================================
   FX LAYER
   ========================================================= */
html.fine, html.fine * { cursor: none !important; }
body { opacity: 0; animation: pageIn .6s ease forwards; }
body.leaving { animation: pageOut .35s ease forwards; }
@keyframes pageIn { to { opacity: 1; } }
@keyframes pageOut { from { opacity: 1; } to { opacity: 0; transform: translateY(-8px); } }

/* Cursor-lit grid + spotlight */
.bg-grid-lit {
  background-image:
    linear-gradient(rgba(255,255,255,0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.13) 1px, transparent 1px);
  mask-image: radial-gradient(240px circle at var(--mx, -500px) var(--my, -500px), #000, transparent 70%);
  -webkit-mask-image: radial-gradient(240px circle at var(--mx, -500px) var(--my, -500px), #000, transparent 70%);
}
.spotlight {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(700px circle at var(--mx, -999px) var(--my, -999px), rgba(255,255,255,0.06), transparent 45%);
}
#trail { position: fixed; inset: 0; z-index: 9998; pointer-events: none; }
.cursor-dot, .cursor-ring {
  position: fixed; top: 0; left: 0; z-index: 9999; pointer-events: none; border-radius: 50%;
  mix-blend-mode: difference; will-change: transform;
}
.cursor-dot { width: 6px; height: 6px; margin: -3px 0 0 -3px; background: #fff; }
.cursor-ring {
  width: 36px; height: 36px; margin: -18px 0 0 -18px; border: 1.5px solid #fff;
  transition: width .25s, height .25s, margin .25s, background .25s;
}
.cursor-ring.hover { width: 64px; height: 64px; margin: -32px 0 0 -32px; background: #fff; }
.cursor-ring.down { width: 24px; height: 24px; margin: -12px 0 0 -12px; }
.ripple {
  position: fixed; z-index: 9997; pointer-events: none; width: 10px; height: 10px; margin: -5px 0 0 -5px;
  border: 1px solid rgba(255,255,255,.7); border-radius: 50%; animation: ripple .7s ease-out forwards;
}
@keyframes ripple { to { transform: scale(14); opacity: 0; } }

/* Scroll progress */
.progress { position: fixed; top: 0; left: 0; height: 2px; width: 100%; z-index: 100; background: #fff; transform-origin: 0 50%; transform: scaleX(var(--p, 0)); }

/* Hero network */
.hero { position: relative; overflow: hidden; }
.hero > div:not(.hint) { position: relative; z-index: 1; }
#network { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; opacity: .9;
  mask-image: radial-gradient(ellipse at center, #000 35%, transparent 80%); -webkit-mask-image: radial-gradient(ellipse at center, #000 35%, transparent 80%); }
.hero-badge .pulse { background: #fff; box-shadow: 0 0 0 0 rgba(255,255,255,.6); }
.hint { position: absolute; bottom: 28px; left: 0; right: 0; text-align: center; font-family: var(--mono); font-size: .75rem; color: var(--muted); z-index: 1; opacity: .7; }
kbd { font-family: var(--mono); font-size: .72rem; padding: 2px 6px; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 6px; background: var(--card); color: var(--text); }

/* Card spotlight border + tilt */
.card, .video-card, .feature, .stat, .channel { position: relative; transform-style: preserve-3d; }
.card::before, .video-card::before, .feature::before, .stat::before, .channel::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none;
  background: radial-gradient(320px circle at var(--x, -999px) var(--y, -999px), rgba(255,255,255,.55), transparent 45%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .3s;
}
.card::after, .video-card::after, .feature::after, .stat::after, .channel::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(400px circle at var(--x, -999px) var(--y, -999px), rgba(255,255,255,.06), transparent 40%);
  opacity: 0; transition: opacity .3s;
}
.card:hover::before, .video-card:hover::before, .feature:hover::before, .stat:hover::before, .channel:hover::before,
.card:hover::after, .video-card:hover::after, .feature:hover::after, .stat:hover::after, .channel:hover::after { opacity: 1; }
.tilt { transition: transform .15s ease-out, border-color .25s, background .25s !important; }

/* Command palette */
.kbd-btn {
  margin-left: auto; font-family: var(--mono); font-size: .78rem; color: var(--muted);
  border: 1px solid var(--border); background: var(--card); border-radius: 10px; padding: 7px 10px; cursor: pointer;
  transition: color .2s, border-color .2s;
}
.kbd-btn:hover { color: var(--text); border-color: rgba(255,255,255,.3); }
.cmdk-backdrop {
  position: fixed; inset: 0; z-index: 200; background: rgba(0,0,0,.6); backdrop-filter: blur(6px);
  display: none; align-items: flex-start; justify-content: center; padding: 14vh 16px 0;
}
.cmdk-backdrop.open { display: flex; animation: pageIn .15s ease; }
.cmdk {
  width: 100%; max-width: 560px; border-radius: 16px; overflow: hidden;
  border: 1px solid rgba(255,255,255,.14); background: #0c0c0e; box-shadow: 0 30px 80px -20px #000;
  animation: pop .2s ease;
}
@keyframes pop { from { transform: scale(.96); opacity: 0; } }
.cmdk input {
  width: 100%; padding: 18px 20px; background: transparent; border: 0; border-bottom: 1px solid var(--border);
  color: var(--text); font: inherit; font-size: 1rem; outline: none;
}
.cmdk ul { list-style: none; max-height: 340px; overflow-y: auto; padding: 8px; }
.cmdk li { display: flex; justify-content: space-between; align-items: center; padding: 11px 12px; border-radius: 10px; color: var(--muted); font-size: .93rem; }
.cmdk li small { font-family: var(--mono); font-size: .72rem; opacity: .6; }
.cmdk li.sel { background: rgba(255,255,255,.08); color: var(--text); }
.cmdk .foot { display: flex; gap: 14px; padding: 10px 16px; border-top: 1px solid var(--border); font-size: .72rem; color: var(--muted); }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translate(-50%, 20px); z-index: 300; opacity: 0;
  padding: 10px 18px; border-radius: 12px; background: #fff; color: #000; font-weight: 600; font-size: .9rem;
  transition: opacity .3s, transform .3s; pointer-events: none;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Easter-egg rain */
#rain { position: fixed; inset: 0; z-index: 150; pointer-events: none; }

@media (max-width: 560px) { .kbd-btn, .hint { display: none; } }
@media (hover: none) { .cursor-dot, .cursor-ring, #trail { display: none; } }

/* Marquee */
.marquee { overflow: hidden; border-block: 1px solid var(--border); padding: 18px 0; mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent); }
.marquee-track { display: flex; gap: 48px; width: max-content; animation: marquee 32s linear infinite; }
.marquee-track span { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.02em; color: #3f3f46; white-space: nowrap; }
.marquee-track span:nth-child(odd) { color: #a1a1aa; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* CLT simulation */
#clt { width: 100%; aspect-ratio: 16/10; border-radius: 14px; background: #000; border: 1px solid var(--border); }
.clt-stats { display: flex; gap: 28px; margin-top: 6px; }
.clt-stats b { display: block; font-family: var(--mono); font-size: 1.5rem; }
.clt-stats span { color: var(--muted); font-size: .8rem; }