:root{
  --bg:#0a0a14;
  --surface:#131320;
  --surface-2:#191929;
  --border:#26263c;
  --border-strong:#3d3d5c;
  --fg:#f4f3fb;
  --fg-dim:#aaa7c9;
  --fg-faint:#6f6c92;
  --accent:#8b5cf6;
  --accent-ink:#140a2b;
  --accent-soft:rgba(139,92,246,.18);
  --accent-2:#22d3ee;
  --accent-2-soft:rgba(34,211,238,.16);
  --gradient:linear-gradient(90deg,var(--accent),var(--accent-2));
  --shadow:0 24px 60px -24px rgba(0,0,0,.65);
  --radius-s:6px;
  --radius-m:12px;
  --mx:50%;
  --my:50%;
  --font-head:'Ubuntu',ui-sans-serif,system-ui,sans-serif;
  --font-body:'IBM Plex Sans',ui-sans-serif,system-ui,sans-serif;
  --font-mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#faf9ff;
    --surface:#ffffff;
    --surface-2:#f1eefc;
    --border:#e6e0f7;
    --border-strong:#cfc4ec;
    --fg:#1b1830;
    --fg-dim:#57517e;
    --fg-faint:#8b84ab;
    --accent:#6d28d9;
    --accent-ink:#fbf7ff;
    --accent-soft:rgba(109,40,217,.10);
    --accent-2:#0891b2;
    --accent-2-soft:rgba(8,145,178,.10);
    --shadow:0 24px 60px -30px rgba(40,20,80,.20);
  }
}
:root[data-theme="light"]{
  --bg:#faf9ff;
  --surface:#ffffff;
  --surface-2:#f1eefc;
  --border:#e6e0f7;
  --border-strong:#cfc4ec;
  --fg:#1b1830;
  --fg-dim:#57517e;
  --fg-faint:#8b84ab;
  --accent:#6d28d9;
  --accent-ink:#fbf7ff;
  --accent-soft:rgba(109,40,217,.10);
  --accent-2:#0891b2;
  --accent-2-soft:rgba(8,145,178,.10);
  --shadow:0 24px 60px -30px rgba(40,20,80,.20);
}
:root[data-theme="dark"]{
  --bg:#0a0a14;
  --surface:#131320;
  --surface-2:#191929;
  --border:#26263c;
  --border-strong:#3d3d5c;
  --fg:#f4f3fb;
  --fg-dim:#aaa7c9;
  --fg-faint:#6f6c92;
  --accent:#8b5cf6;
  --accent-ink:#140a2b;
  --accent-soft:rgba(139,92,246,.18);
  --accent-2:#22d3ee;
  --accent-2-soft:rgba(34,211,238,.16);
  --shadow:0 24px 60px -24px rgba(0,0,0,.65);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  position:relative;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;inset:-15%;
  z-index:-2;
  background:
    radial-gradient(560px circle at 12% 15%, var(--accent-soft), transparent 60%),
    radial-gradient(520px circle at 88% 4%, var(--accent-2-soft), transparent 58%),
    radial-gradient(480px circle at 30% 92%, var(--accent-2-soft), transparent 55%);
  filter:blur(50px);
  animation:drift 26s ease-in-out infinite alternate;
  pointer-events:none;
}
body::after{
  content:"";
  position:fixed;inset:0;z-index:-1;
  background-image:radial-gradient(var(--border-strong) 1px, transparent 1px);
  background-size:26px 26px;
  opacity:.35;
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  pointer-events:none;
}
@keyframes drift{ from{transform:translate3d(0,0,0) scale(1);} to{transform:translate3d(-3%,3%,0) scale(1.06);} }
@media (prefers-reduced-motion: reduce){ body::before{animation:none;} }

/* ---------- cursor-reactive glow ---------- */
.cursor-glow{
  position:fixed;inset:0;z-index:-1;
  background:radial-gradient(560px circle at var(--mx) var(--my), var(--accent-soft), transparent 62%);
  opacity:0;transition:opacity .4s ease;
  pointer-events:none;
}
.cursor-glow.active{opacity:1;}
@media (hover:none), (prefers-reduced-motion: reduce){ .cursor-glow{display:none;} }

::selection{background:var(--accent-soft);color:var(--accent);}
img,svg{max-width:100%;}

a{color:inherit;text-decoration:none;}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}

h1,h2,h3{font-family:var(--font-head);font-weight:700;margin:0;text-wrap:balance;color:var(--fg);}
p{margin:0;}

.wrap{max-width:1080px;margin:0 auto;padding:0 24px;}
.eyebrow{
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.09em;
  text-transform:uppercase;
  color:var(--accent);
  margin:0 0 12px;
  display:flex;align-items:center;gap:8px;
}
section{scroll-margin-top:84px;}

.cursor{
  display:inline-block;width:2px;height:1em;background:var(--accent);
  vertical-align:-.15em;animation:blink 1.1s step-end infinite;
}
@keyframes blink{50%{opacity:0;}}
@media (prefers-reduced-motion: reduce){ .cursor{animation:none;} }

/* ---------- scroll progress ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;height:3px;width:0%;
  background:var(--gradient);
  z-index:70;
  transition:width .12s linear;
}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:40;
  background:color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;}
.brand{font-family:var(--font-head);font-weight:700;font-size:1.05rem;color:var(--fg);display:flex;align-items:baseline;gap:2px;}
.brand span{color:var(--accent);}
.nav-links{display:flex;gap:28px;list-style:none;margin:0;padding:0;}
.nav-links a{position:relative;font-size:.92rem;color:var(--fg-dim);padding:4px 0;transition:color .15s ease;}
.nav-links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:-1px;height:2px;
  background:var(--gradient);transition:right .25s ease;
}
.nav-links a:hover{color:var(--fg);}
.nav-links a:hover::after{right:0;}
.nav-links a.active{color:var(--fg);}
.nav-links a.active::after{right:0;}
.nav-toggle{display:none;background:none;border:1px solid var(--border-strong);border-radius:var(--radius-s);width:38px;height:38px;color:var(--fg);font-size:1.1rem;cursor:pointer;}

@media (max-width:760px){
  .nav-links{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;gap:0;
    background:var(--surface);
    border-bottom:1px solid var(--border);
    max-height:0;overflow:hidden;
    transition:max-height .25s ease;
  }
  .nav-links.open{max-height:360px;}
  .nav-links a{display:block;padding:16px 24px;border-bottom:1px solid var(--border);}
  .nav-toggle{display:block;}

  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .hero{padding:44px 0 36px;gap:36px;}
  .repo-card{padding:18px 20px;}
  .proj-card{padding:24px 22px 22px;}
  .stat-row{row-gap:18px;}
  .bot-list li{padding:10px 6px;}
  .tag{padding:4px 10px;}
  .footer-links{gap:14px 20px;}
}

/* ---------- hero ---------- */
.hero{
  padding:88px 0 70px;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:48px;
  align-items:center;
}
.avatar{
  width:52px;height:52px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--gradient);color:var(--accent-ink);
  font-family:var(--font-head);font-weight:700;font-size:1.1rem;
  margin-bottom:18px;
  box-shadow:0 10px 24px -10px var(--accent-soft);
}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.4rem);line-height:1.08;margin-bottom:18px;}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(90deg,var(--accent),var(--accent-2),var(--accent));
  background-size:200% auto;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:shimmer 5s linear infinite;
}
@keyframes shimmer{ to{background-position:-200% center;} }
@media (prefers-reduced-motion: reduce){ .hero h1 em{animation:none;} }
.hero .lede{font-size:1.08rem;color:var(--fg-dim);max-width:52ch;margin-bottom:18px;}
.hero .note{font-size:.92rem;color:var(--fg-dim);font-style:italic;max-width:52ch;margin-bottom:30px;}
.hero .note b{font-style:normal;color:var(--fg);}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px;}
.btn{
  position:relative;overflow:hidden;
  font-family:var(--font-body);font-weight:500;font-size:.94rem;
  padding:12px 20px;border-radius:var(--radius-s);
  border:1px solid var(--border-strong);
  transition:transform .18s ease, border-color .18s ease, box-shadow .18s ease;
  display:inline-flex;align-items:center;gap:8px;
}
.btn-primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:600;}
.btn-primary::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,transparent,rgba(255,255,255,.4),transparent);
  transform:translateX(-130%);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px -12px var(--accent-soft);}
.btn-primary:hover::after{transform:translateX(130%);transition:transform .6s ease;}
.btn-ghost{color:var(--fg);}
.btn-ghost:hover{border-color:var(--accent-2);color:var(--accent-2);transform:translateY(-2px);}

.stat-row{display:flex;gap:32px;flex-wrap:wrap;}
.stat b{display:block;font-family:var(--font-head);font-size:1.5rem;font-variant-numeric:tabular-nums;color:var(--fg);}
.stat span{font-size:.78rem;color:var(--fg-faint);text-transform:uppercase;letter-spacing:.06em;}

.hero-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-m);
  box-shadow:var(--shadow);
  overflow:hidden;
  transition:transform .2s ease, box-shadow .2s ease;
  transform-style:preserve-3d;
  will-change:transform;
}
.hero-card:hover{box-shadow:0 30px 70px -24px var(--accent-2-soft);}
.hero-card-bar{display:flex;gap:6px;padding:12px 14px;border-bottom:1px solid var(--border);background:var(--surface-2);}
.hero-card-bar span{width:9px;height:9px;border-radius:50%;background:var(--border-strong);}
.hero-card-body{padding:20px 22px 24px;font-family:var(--font-mono);font-size:.86rem;line-height:1.9;color:var(--fg-dim);}
.hero-card-body .k{color:var(--accent-2);}
.hero-card-body .v{color:var(--fg);}

@media (max-width:820px){
  .hero{grid-template-columns:1fr;padding-top:48px;}
}

/* ---------- generic section ---------- */
.section{padding:76px 0;border-top:1px solid var(--border);}
.section-head{max-width:640px;margin-bottom:44px;}
.section-head h2{font-size:clamp(1.5rem,3vw,2rem);}
.page-hero{padding:56px 0 12px;}
.page-hero h1{font-size:clamp(1.8rem,3.6vw,2.6rem);margin-bottom:14px;}
.page-hero .lede{font-size:1.02rem;color:var(--fg-dim);max-width:60ch;}

/* ---------- parcours timeline ---------- */
.timeline{position:relative;max-width:760px;padding-left:28px;}
.timeline::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:1px;background:var(--border-strong);}
.tl-item{position:relative;padding-bottom:36px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-28px;top:5px;
  width:11px;height:11px;border-radius:50%;
  background:var(--surface);border:2px solid var(--accent-2);
  transition:transform .2s ease;
}
.tl-item:hover::before{transform:scale(1.3);}
.tl-item.now::before{background:var(--accent);border-color:var(--accent);animation:pulse 2s ease-out infinite;}
@keyframes pulse{0%{box-shadow:0 0 0 0 var(--accent-soft);}70%{box-shadow:0 0 0 10px transparent;}100%{box-shadow:0 0 0 0 transparent;}}
@media (prefers-reduced-motion: reduce){ .tl-item.now::before{animation:none;} }
.tl-tag{font-family:var(--font-mono);font-size:.72rem;color:var(--fg-faint);text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px;}
.tl-item h3{font-size:1.08rem;margin-bottom:6px;}
.tl-item p{color:var(--fg-dim);font-size:.95rem;max-width:56ch;}

/* ---------- stacks ---------- */
.stack-group{margin-bottom:28px;}
.stack-group:last-child{margin-bottom:0;}
.stack-group h3{font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:var(--fg-faint);font-weight:500;margin-bottom:14px;}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;}
.pill{
  font-family:var(--font-mono);font-size:.85rem;color:var(--fg);
  background:var(--surface);border:1px solid var(--border);
  border-radius:999px;padding:7px 15px;
  transition:border-color .18s ease, transform .18s ease, color .18s ease;
}
.pill:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);}

/* ---------- shared lift/glow card ---------- */
.liftcard{transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;}
.liftcard:hover{transform:translateY(-4px);border-color:var(--accent-2);box-shadow:0 20px 45px -22px var(--accent-2-soft);}

/* ---------- spotlight-on-hover (follows cursor) ---------- */
.spot{position:relative;overflow:hidden;}
.spot::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:radial-gradient(220px circle at var(--sx,50%) var(--sy,50%), var(--accent-soft), transparent 72%);
  opacity:0;transition:opacity .35s ease;
  pointer-events:none;
}
.spot:hover::before{opacity:1;}
.spot > *{position:relative;z-index:1;}

/* ---------- repo grid ---------- */
.stat-line{color:var(--fg-faint);font-size:.85rem;margin:-24px 0 28px;}
.repo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;}
.repo-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-s);
  padding:16px 18px;
}
.repo-card .path{font-family:var(--font-mono);font-size:.72rem;color:var(--fg-faint);margin-bottom:6px;display:block;}
.repo-card a{font-weight:600;font-size:.95rem;color:var(--fg);}
.repo-card:hover a{color:var(--accent-2);}
.repo-card p{color:var(--fg-dim);font-size:.83rem;margin-top:6px;line-height:1.5;}

/* ---------- featured projects ---------- */
.proj-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
@media (max-width:760px){.proj-grid{grid-template-columns:1fr;}}
.proj-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-m);
  padding:26px 26px 24px;display:flex;flex-direction:column;gap:14px;
}
.proj-card.wide{grid-column:1 / -1;}
.proj-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;}
.proj-top h3{font-size:1.15rem;}
.proj-status{font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.05em;color:var(--accent-2);white-space:nowrap;padding-top:4px;}
.proj-card p.desc{color:var(--fg-dim);font-size:.92rem;line-height:1.65;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{font-family:var(--font-mono);font-size:.72rem;color:var(--fg-dim);background:var(--surface-2);border:1px solid var(--border);border-radius:4px;padding:3px 8px;}
.proj-link{margin-top:auto;font-size:.88rem;font-weight:500;color:var(--accent-2);display:inline-flex;align-items:center;gap:6px;transition:gap .18s ease, color .18s ease;}
.proj-link:hover{color:var(--accent);gap:10px;}

.bot-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px 18px;}
.bot-list li{font-size:.85rem;color:var(--fg-dim);padding:9px 6px;border-top:1px solid var(--border);border-radius:4px;transition:background .18s ease,padding-left .18s ease;}
.bot-list li:hover{background:var(--surface-2);padding-left:12px;}
.bot-list li b{font-family:var(--font-mono);font-weight:500;color:var(--fg);display:block;font-size:.82rem;margin-bottom:2px;}

/* ---------- home: explore grid ---------- */
.home-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;}
.home-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-m);
  padding:22px 22px 20px;
}
.home-card .hc-num{font-family:var(--font-mono);font-size:.75rem;color:var(--fg-faint);}
.home-card h3{font-size:1.05rem;}
.home-card p{color:var(--fg-dim);font-size:.88rem;line-height:1.55;flex:1;}
.home-card .hc-link{font-size:.85rem;font-weight:500;color:var(--accent-2);display:inline-flex;align-items:center;gap:6px;transition:gap .18s ease, color .18s ease;}
.home-card:hover .hc-link{color:var(--accent);gap:10px;}

/* ---------- contact page ---------- */
.contact-grid{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:32px;}
.contact-links{display:flex;flex-wrap:wrap;gap:10px 28px;list-style:none;margin:14px 0 0;padding:0;}
.contact-links a{font-size:.94rem;color:var(--fg-dim);position:relative;}
.contact-links a:not(.plain)::after{
  content:"";position:absolute;left:0;right:100%;bottom:-2px;height:1px;
  background:var(--accent-2);transition:right .2s ease;
}
.contact-links a:hover{color:var(--accent-2);}
.contact-links a:hover::after{right:0;}
.sig{font-family:var(--font-mono);font-size:.82rem;color:var(--fg-faint);}
.sig b{color:var(--accent-2);font-weight:500;}

/* ---------- site footer (every page) ---------- */
.site-footer{border-top:1px solid var(--border);padding:40px 0 36px;}
.site-footer .tagline{color:var(--fg-faint);font-size:.85rem;margin-top:10px;max-width:46ch;}
.footer-links{display:flex;flex-wrap:wrap;gap:10px 22px;list-style:none;margin:16px 0 0;padding:0;}
.footer-links a{font-size:.88rem;color:var(--fg-dim);position:relative;}
.footer-links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:-2px;height:1px;
  background:var(--accent-2);transition:right .2s ease;
}
.footer-links a:hover{color:var(--accent-2);}
.footer-links a:hover::after{right:0;}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease, transform .55s ease;}
.reveal.visible{opacity:1;transform:translateY(0);}
.stagger-item{opacity:0;transform:translateY(12px) scale(.98);transition:opacity .5s ease, transform .5s ease;transition-delay:var(--d,0ms);}
.reveal.visible .stagger-item{opacity:1;transform:translateY(0) scale(1);}
@media (prefers-reduced-motion: reduce){
  .reveal, .stagger-item{opacity:1;transform:none;transition:none;}
}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:50;
  width:44px;height:44px;border-radius:50%;
  background:var(--surface);border:1px solid var(--border-strong);color:var(--fg);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow);cursor:pointer;
  opacity:0;transform:translateY(10px) scale(.9);pointer-events:none;
  transition:opacity .25s ease, transform .25s ease, border-color .2s ease, color .2s ease;
}
.to-top svg{width:13px;height:13px;}
.to-top.visible{opacity:1;transform:translateY(0) scale(1);pointer-events:auto;}
.to-top:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-3px);}
@media (prefers-reduced-motion: reduce){ .to-top{transition:opacity .15s linear;} }