:root{
  --paper:#101217;
  --card:#181b22;
  --card-strong:#1e222b;
  --ink:#edf0f4;
  --muted:#98a1b0;
  --line:#282d38;
  --trace:#e08a4f;
  --trace-dim:rgba(224,138,79,0.16);
  --teal:#4fb6a2;
  --ok:#5fbf88;
}
body.light{
  --paper:#f3f5f7;
  --card:#ffffff;
  --card-strong:#eaeef2;
  --ink:#161a22;
  --muted:#5c6675;
  --line:#dde2e8;
  --trace:#b85a22;
  --trace-dim:rgba(184,90,34,0.12);
  --teal:#2f8f7a;
  --ok:#2f7a4f;
}
html{scroll-behavior:smooth;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:'Inter',system-ui,sans-serif;
  line-height:1.5;
  overflow-x:hidden;
}
h1,h2,h3{font-family:'Space Grotesk',sans-serif;font-weight:600;letter-spacing:-0.01em;}
.mono{font-family:'JetBrains Mono',monospace;}
a{color:inherit;}
::selection{background:var(--trace-dim);color:var(--ink);}

/* pipeline */
.pipeline{
  position:fixed;
  left:40px;
  top:0;
  bottom:0;
  width:2px;
  z-index:50;
  display:flex;
  flex-direction:column;
  align-items:center;
}
.pipeline-track{
  position:absolute;
  left:0; top:0; bottom:0;
  width:2px;
  background:var(--line);
}
.pipeline-fill{
  position:absolute;
  left:0; top:0;
  width:2px;
  height:0%;
  background:var(--trace);
  transition:height .1s linear;
}
.node{
  position:absolute;
  left:50%;
  transform:translateX(-50%);
  width:11px; height:11px;
  border-radius:50%;
  background:var(--paper);
  border:2px solid var(--line);
  cursor:pointer;
  transition:border-color .3s ease, background .3s ease, transform .2s ease;
}
.node:hover{transform:translateX(-50%) scale(1.25);}
.node.active{border-color:var(--trace);background:var(--trace);}
.node-label{
  position:absolute;
  left:22px;
  top:50%;
  transform:translateY(-50%);
  font-size:11px;
  white-space:nowrap;
  color:var(--muted);
  opacity:0;
  transition:opacity .25s ease;
  pointer-events:none;
}
.node:hover .node-label{opacity:1;}

@media (max-width:900px){
  .pipeline{display:none;}
}

.aurora{
  position:fixed;
  inset:0;
  z-index:0;
  overflow:hidden;
  pointer-events:none;
  background:var(--paper);
}
.aurora .grid{
  position:absolute;
  inset:-50px;
  background-image:radial-gradient(var(--line) 1px, transparent 1px);
  background-size:36px 36px;
  opacity:0.22;
  animation:gridpan 60s linear infinite;
}
.glow{
  position:absolute;
  top:-10%;
  left:50%;
  width:900px;
  height:900px;
  transform:translateX(-50%);
  border-radius:50%;
  background:radial-gradient(circle, var(--trace) 0%, transparent 68%);
  opacity:0.08;
  filter:blur(20px);
  animation:breathe2 14s ease-in-out infinite;
}
@keyframes gridpan{from{transform:translate(0,0);}to{transform:translate(36px,36px);}}
@keyframes breathe2{0%,100%{opacity:0.06;}50%{opacity:0.11;}}

main{position:relative;z-index:1;}
.top-progress, .pipeline{z-index:50;}

.theme-toggle{
  position:fixed;
  top:24px;
  right:24px;
  z-index:55;
  width:38px;height:38px;
  border-radius:50%;
  border:1px solid var(--line);
  background:var(--card);
  color:var(--ink);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  transition:border-color .2s ease, transform .15s ease;
}
.theme-toggle:hover{border-color:var(--trace);transform:scale(1.06);}
.theme-toggle svg{width:17px;height:17px;}
.theme-toggle .icon-sun{display:none;}
body.light .theme-toggle .icon-moon{display:none;}
body.light .theme-toggle .icon-sun{display:block;}
main{max-width:760px;margin:0 auto;padding:0 32px 0 100px;}
@media (max-width:900px){main{padding:0 24px;}}

/* mobile top progress bar */
.top-progress{
  display:none;
  position:fixed;top:0;left:0;right:0;height:3px;background:var(--line);z-index:60;
}
.top-progress-fill{height:100%;width:0%;background:var(--trace);transition:width .1s linear;}
@media (max-width:900px){.top-progress{display:block;}}

section{padding:110px 0;border-bottom:1px solid var(--line);}
section:last-of-type{border-bottom:none;}

.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease;}
.reveal.in-view{opacity:1;transform:translateY(0);}
.reveal.d1{transition-delay:.08s;}
.reveal.d2{transition-delay:.16s;}
.reveal.d3{transition-delay:.24s;}

/* stagger groups: container stays visible, children animate individually */
.reveal-group > *{opacity:0;transform:translateY(14px) scale(.97);transition:opacity .45s ease, transform .45s ease, border-color .2s ease, background .2s ease;}
.reveal-group.in-view > *{opacity:1;transform:translateY(0) scale(1);}
.reveal-group.in-view > *:nth-child(1){transition-delay:.02s;}
.reveal-group.in-view > *:nth-child(2){transition-delay:.08s;}
.reveal-group.in-view > *:nth-child(3){transition-delay:.14s;}
.reveal-group.in-view > *:nth-child(4){transition-delay:.20s;}
.reveal-group.in-view > *:nth-child(5){transition-delay:.26s;}
.reveal-group.in-view > *:nth-child(6){transition-delay:.32s;}
.reveal-group.in-view > *:nth-child(7){transition-delay:.38s;}
.reveal-group.in-view > *:nth-child(8){transition-delay:.44s;}
.cert-list.reveal-group ul{opacity:1;transform:none;transition:none;}
.cert-list.reveal-group li{opacity:0;transform:translateY(12px);transition:opacity .45s ease, transform .45s ease;}
.cert-list.reveal-group.in-view li{opacity:1;transform:translateY(0);}
.cert-list.reveal-group.in-view li:nth-child(1){transition-delay:.02s;}
.cert-list.reveal-group.in-view li:nth-child(2){transition-delay:.1s;}
.cert-list.reveal-group.in-view li:nth-child(3){transition-delay:.18s;}
.cert-list.reveal-group.in-view li:nth-child(4){transition-delay:.26s;}

/* node ping when it becomes active */
.node.pulse::after{
  content:"";
  position:absolute;
  inset:-6px;
  border-radius:50%;
  border:1.5px solid var(--trace);
  animation:ping .7s ease-out;
}
@keyframes ping{from{opacity:.8;transform:scale(.6);}to{opacity:0;transform:scale(1.9);}}

/* HERO */
.hero{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  justify-content:center;
  border-bottom:1px solid var(--line);
  padding:110px 0;
}
.author-row{display:flex;align-items:center;gap:14px;margin-bottom:22px;}
.avatar{width:56px;height:56px;border-radius:50%;object-fit:cover;border:1px solid var(--line);}
.terminal-line{font-size:14px;color:var(--muted);margin-bottom:0;}
.terminal-line .prompt{color:var(--trace);}
.cursor{display:inline-block;width:8px;height:16px;background:var(--ink);vertical-align:-3px;animation:blink 1s step-end infinite;}
@keyframes blink{50%{opacity:0;}}
.hero h1{font-size:clamp(48px,9vw,88px);line-height:0.98;margin-bottom:18px;}
.hero .role{font-size:18px;color:var(--muted);max-width:480px;margin-bottom:36px;}
.hero .role strong{color:var(--ink);font-weight:500;}
.scroll-cue{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:8px;}
.scroll-cue svg{animation:down 1.6s ease-in-out infinite;}
@keyframes down{0%,100%{transform:translateY(0);}50%{transform:translateY(5px);}}

/* eyebrow / section labels */
.eyebrow{font-size:12px;color:var(--trace);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.eyebrow::before{content:"";width:16px;height:1px;background:var(--trace);display:inline-block;}

/* ABOUT */
.about p{font-size:17px;color:var(--muted);max-width:560px;margin-bottom:14px;}
.about p strong{color:var(--ink);font-weight:500;}
.badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px;}
.badge{
  display:flex;align-items:center;gap:8px;
  border:1px solid var(--line);
  background:var(--card);
  border-radius:8px;
  padding:8px 12px;
  font-size:12px;
  transition:border-color .25s ease, transform .25s ease, background .25s ease;
}
.badge:hover{border-color:var(--trace);transform:translateY(-3px);background:var(--card-strong);}
.badge svg{width:16px;height:16px;flex-shrink:0;color:var(--trace);transition:transform .3s ease;}
.badge:hover svg{transform:scale(1.15) rotate(-4deg);}
.badge span{color:var(--muted);}

/* PROJECTS */
.project-meta{font-size:12px;color:var(--muted);}
.project-meta .status{color:var(--ok);}
.car-slide p.desc{color:var(--muted);font-size:15px;max-width:560px;margin-bottom:20px;}
.project-links{display:flex;gap:16px;margin-bottom:22px;font-size:13px;}
.project-links a{color:var(--trace);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s ease;}
.project-links a:hover{border-bottom-color:var(--trace);}
.tags{display:flex;flex-wrap:wrap;gap:6px;}
.tag{font-size:11px;font-family:'JetBrains Mono',monospace;color:var(--muted);background:var(--card);border:1px solid var(--line);border-radius:5px;padding:3px 8px;transition:border-color .2s ease, color .2s ease, transform .2s ease;}
.tag:hover{border-color:var(--trace);color:var(--ink);transform:translateY(-2px);}

/* CAROUSEL */
.carousel{display:flex;align-items:center;gap:14px;}
.car-window{
  flex:1;
  position:relative;
  height:460px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
}
.car-track{position:relative;width:100%;height:100%;}
.car-slide{
  position:absolute;
  inset:0;
  padding:32px;
  opacity:0;
  pointer-events:none;
  transform:translateX(24px);
  transition:opacity .45s ease, transform .45s ease;
  overflow-y:auto;
  scrollbar-width:thin;
  scrollbar-color:var(--line) transparent;
}
.car-slide::-webkit-scrollbar{width:4px;}
.car-slide::-webkit-scrollbar-track{background:transparent;}
.car-slide::-webkit-scrollbar-thumb{background:var(--line);border-radius:10px;}
.car-slide::-webkit-scrollbar-thumb:hover{background:var(--muted);}
.car-slide.active{opacity:1;pointer-events:auto;transform:translateX(0);}
.car-slide h3{font-size:28px;margin:6px 0 16px;}

.car-arrow{
  flex-shrink:0;
  width:40px;height:40px;
  border-radius:50%;
  border:1px solid var(--line);
  background:var(--card);
  color:var(--ink);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  transition:border-color .2s ease, transform .15s ease, background .2s ease;
}
.car-arrow svg{width:18px;height:18px;}
.car-arrow:hover{border-color:var(--trace);background:var(--card-strong);transform:scale(1.06);}
.car-arrow:active{transform:scale(0.94);}

.visual{margin:18px 0;display:flex;gap:14px;align-items:flex-end;}
.visual .main-shot{width:100%;border-radius:10px;border:1px solid var(--line);display:block;}
.visual.phones-only{justify-content:center;padding:12px 0;}
.visual.phones-only .phones{gap:clamp(10px, 4vw, 22px);}
.visual.phones-only .phone{width:clamp(72px, 22vw, 150px);}
.phones{display:flex;gap:10px;flex-shrink:0;}
.phone{
  width:78px;
  aspect-ratio:9/19.5;
  border-radius:20px;
  border:2px solid var(--line);
  background:var(--paper);
  overflow:hidden;
  flex-shrink:0;
}
.phone img{width:100%;height:100%;object-fit:cover;display:block;}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:100%;}
.pair img{width:100%;border-radius:10px;border:1px solid var(--line);display:block;}

@media (max-width:640px){
  .car-window{height:560px;}
  .car-slide{padding:20px;}
  .visual{flex-direction:column;align-items:stretch;}
  .phones{align-self:center;}
  .car-arrow{width:32px;height:32px;}
  .car-arrow svg{width:15px;height:15px;}
  .carousel{gap:8px;}
}

/* bowed scrubber */
.car-scrub{
  display:flex;
  justify-content:center;
  align-items:flex-start;
  gap:22px;
  height:44px;
  margin-top:18px;
  cursor:grab;
  user-select:none;
}
.scrub-tick{
  width:9px;height:9px;
  border-radius:50%;
  background:var(--line);
  border:none;
  cursor:pointer;
  transition:background .25s ease, transform .25s ease;
  flex-shrink:0;
}
.scrub-tick:hover{background:var(--muted);}
.scrub-tick.active{background:var(--trace);transform:scale(1.35);}

/* CERTS */
.certs-wrap{display:flex;gap:32px;align-items:flex-start;flex-wrap:wrap;}
.cert-shot img{width:100%;max-width:340px;border-radius:10px;border:1px solid var(--line);display:block;}
.cert-list{flex:1;min-width:220px;}
.cert-list ul{list-style:none;font-size:14px;color:var(--muted);}
.cert-list li{padding:10px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;}
.cert-list li strong{color:var(--ink);font-weight:500;}
.cert-list li .status{font-size:11px;font-family:'JetBrains Mono',monospace;flex-shrink:0;}
.cert-list li .status.live{color:var(--ok);}
.cert-list li .status.pending{color:var(--muted);}

/* CONTACT */
.contact h2{font-size:clamp(34px,6vw,56px);margin-bottom:16px;max-width:560px;}
.contact p{color:var(--muted);font-size:16px;margin-bottom:36px;max-width:480px;}
.contact-links{display:flex;flex-wrap:wrap;gap:12px;}
.contact-links a{
  display:flex;align-items:center;gap:8px;
  border:1px solid var(--line);
  background:var(--card);
  border-radius:8px;
  padding:12px 18px;
  font-size:14px;
  text-decoration:none;
  transition:border-color .2s ease, transform .15s ease;
}
.contact-links a:hover{border-color:var(--trace);transform:translateY(-2px);}
.contact-links svg{width:16px;height:16px;color:var(--trace);}
.foot{margin-top:64px;font-size:12px;color:var(--muted);font-family:'JetBrains Mono',monospace;}
.foot .dot{color:var(--ok);}

a:focus-visible, .node:focus-visible{
  outline:2px solid var(--trace);
  outline-offset:3px;
  border-radius:3px;
}
.project-links a, .contact-links a, .node{cursor:pointer;}

@media (prefers-reduced-motion:reduce){
  .grid, .glow{animation:none;}
  html{scroll-behavior:auto;}
  .reveal{transition:none;opacity:1;transform:none;}
  .cursor{animation:none;}
  .scroll-cue svg{animation:none;}
}