/* ===== Sabir Oussaoui - portfolio (CodeBucks-style template, plain CSS) ===== */
@import url("https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap");

:root{
  --light:#f5f5f5;
  --dark:#1b1b1b;
  --primary:#0b7f82;        /* cyan, darkened for contrast on light */
  --primary-dark:#55dde0;   /* cyan on dark */
  --veg:#8fcb9b;
  --amber:#e6ad63;
  --bg:var(--light);
  --fg:var(--dark);
  --accent:var(--primary);
  --muted:rgba(27,27,27,.65);
  --line:rgba(27,27,27,.15);
  --card:#ffffff;
  --font:"Montserrat",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;
}
html.dark{
  --bg:var(--dark);
  --fg:var(--light);
  --accent:var(--primary-dark);
  --muted:rgba(245,245,245,.7);
  --line:rgba(245,245,245,.18);
  --card:#111111;
}
/* Black hole background (js/space-bg.js), dark mode only */
#spaceBg{position:fixed;inset:0;width:100%;height:100%;z-index:-1;display:none;pointer-events:none;opacity:.8}
html.dark.has-space{background:#030307}
html.dark.has-space #spaceBg{display:block}
html.dark.has-space body{background:transparent}
html.dark.has-space main :is(h1,h2,h3,p,span,li,a.link):not(article *):not(.btn){text-shadow:0 1px 3px rgba(0,0,0,.9),0 0 14px rgba(0,0,0,.75)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--fg);line-height:1.5;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}
h1,h2,h3,h4{margin:0;line-height:1.1;font-weight:800;letter-spacing:-.02em}
.mono{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.wrap{width:100%;max-width:1400px;margin:0 auto;padding:0 64px}
section{padding:96px 0}
.title{font-size:64px;text-align:center;margin-bottom:64px}
.btn{display:inline-flex;align-items:center;gap:10px;min-height:48px;padding:0 26px;border-radius:999px;border:2px solid var(--fg);background:var(--fg);color:var(--bg);font:600 15px var(--font);text-decoration:none;cursor:pointer;transition:background .2s,color .2s,transform .15s}
.btn:hover{background:var(--bg);color:var(--fg)}
.btn:active{transform:scale(.98)}
.btn.ghost{background:transparent;color:var(--fg)}
.btn.ghost:hover{background:var(--fg);color:var(--bg)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.rule{height:1px;background:var(--line)}

/* ---------- page transition ---------- */
.transition{position:fixed;inset:0;z-index:100;pointer-events:none}
.transition span{position:absolute;inset:0;transform:scaleX(1);transform-origin:left;animation:wipe .8s cubic-bezier(.76,0,.24,1) forwards}
.transition span:nth-child(1){background:var(--accent)}
.transition span:nth-child(2){background:var(--fg);animation-delay:.12s}
.transition span:nth-child(3){background:var(--bg);animation-delay:.24s}
@keyframes wipe{to{transform:scaleX(0)}}

/* ---------- nav ---------- */
header.nav{position:fixed;left:0;right:0;top:0;z-index:50;box-sizing:border-box;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:20px 64px;font-weight:500;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .3s,padding .3s}
header.nav.scrolled{border-bottom-color:var(--line)}
.nav-links{display:flex;gap:28px;flex:1;justify-content:center}
.nl{position:relative;text-decoration:none;padding-bottom:2px}
.nl::after{content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--fg);transition:width .3s}
.nl:hover::after,.nl[aria-current="page"]::after{width:100%}
.logo{position:static;transform:none;order:-1;flex:none;height:52px;padding:4px 18px 4px 4px;border-radius:999px;background:var(--dark);color:var(--light);display:flex;align-items:center;gap:12px;font-weight:700;font-size:15px;letter-spacing:.01em;white-space:nowrap;text-decoration:none;border:2px solid transparent;transition:background .3s,border-color .3s}
.logo img{width:48px;height:48px;border-radius:50%;object-fit:cover;background:var(--light)}
html.dark .logo img{background:var(--dark)}
html.dark .logo{background:var(--light);color:var(--dark)}
.logo:hover{background:var(--accent);border-color:var(--fg)}
.socials{display:flex;align-items:center;gap:14px}
.soc{width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;color:var(--fg);transition:transform .2s,color .2s}
.soc:hover{transform:translateY(-3px);color:var(--accent)}
.theme{width:34px;height:34px;border-radius:50%;border:0;background:var(--dark);color:var(--light);display:inline-flex;align-items:center;justify-content:center;cursor:pointer}
html.dark .theme{background:var(--light);color:var(--dark)}
.lang{border:1px solid var(--line);background:transparent;color:var(--fg);border-radius:999px;padding:6px 12px;font:600 12px var(--mono);cursor:pointer}
.burger{display:none;flex-direction:column;gap:6px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:30px;height:2px;background:var(--fg);transition:transform .3s,opacity .3s}
.mobile-menu{display:none}

/* ---------- hero (index) ---------- */
.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:48px;min-height:calc(100vh - 130px);padding:24px 0 64px}
.hero-img{position:relative}
.hero-img img{width:100%;max-width:520px;max-height:calc(100vh - 200px);object-fit:cover;object-position:top;aspect-ratio:4/5;margin:0 auto;border-radius:24px}
.hero-txt h1{font-size:56px;text-align:left;margin-bottom:24px}
.hero-txt p{font-size:17px;color:var(--muted);max-width:620px;margin:0 0 20px}
.hero-txt p b{color:var(--fg);font-weight:800}
.hero-aff{display:flex;flex-direction:column;gap:4px;font-size:14px;color:var(--muted);margin-bottom:28px}
.hero-cta{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.hero-cta .link{font-size:15px;font-weight:600;text-decoration:underline;text-underline-offset:4px}
/* animated headline words */
.anim-word{display:inline-block;opacity:0;transform:translateY(40px);animation:word .55s ease-out forwards}
@keyframes word{to{opacity:1;transform:none}}

/* rotating badge */
.hireme{position:fixed;left:40px;bottom:40px;width:160px;height:160px;z-index:40;display:flex;align-items:center;justify-content:center}
.hireme svg.ring{position:absolute;inset:0;width:100%;height:100%;animation:spin 14s linear infinite;fill:var(--fg)}
.hireme a{position:relative;width:64px;height:64px;border-radius:50%;background:var(--dark);color:var(--light);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:13px;text-decoration:none;border:2px solid transparent;transition:.3s}
html.dark .hireme a{background:var(--light);color:var(--dark)}
.hireme a:hover{background:var(--accent);border-color:var(--fg);color:var(--dark)}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:5fr 2.6fr 2.2fr;gap:48px;align-items:start}
.bio h3{font-size:14px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:700;margin-bottom:16px}
.bio p{margin:0 0 16px;font-size:15px;font-weight:500}
.frame{position:relative;box-shadow:14px 14px 0 var(--fg);padding:16px;max-width:360px;margin:0 auto;width:100%;border:2px solid var(--fg);border-radius:24px;background:var(--bg)}
.frame img{border-radius:16px;width:100%;height:auto;aspect-ratio:4/5;max-height:400px;object-fit:contain;object-position:50% 100%;background:linear-gradient(180deg,var(--card),var(--bg));display:block}
.stats{display:flex;flex-direction:column;gap:40px;align-items:flex-end;text-align:right}
.stats>div{display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.stats .num{font-size:64px;font-weight:800;letter-spacing:-.03em;line-height:1}
.stats .lbl{font-size:14px;font-weight:600;color:var(--muted)}

/* skills map: 3D-looking globe with skills orbiting like satellites */
.skills{--k:1;position:relative;height:920px;max-width:1200px;margin:0 auto;overflow:hidden;border-radius:28px;background:radial-gradient(circle at 50% 50%, #0b1a2e 0, #060b14 55%, #04070d 100%);isolation:isolate}
.skills::before{content:"";position:absolute;inset:0;background-image:radial-gradient(1px 1px at 20% 30%,rgba(255,255,255,.5) 50%,transparent 51%),radial-gradient(1px 1px at 70% 20%,rgba(255,255,255,.4) 50%,transparent 51%),radial-gradient(1px 1px at 85% 65%,rgba(255,255,255,.5) 50%,transparent 51%),radial-gradient(1px 1px at 35% 80%,rgba(255,255,255,.35) 50%,transparent 51%),radial-gradient(1.5px 1.5px at 55% 90%,rgba(255,255,255,.45) 50%,transparent 51%),radial-gradient(1px 1px at 10% 60%,rgba(255,255,255,.4) 50%,transparent 51%),radial-gradient(1px 1px at 92% 35%,rgba(255,255,255,.35) 50%,transparent 51%),radial-gradient(1.5px 1.5px at 45% 12%,rgba(255,255,255,.5) 50%,transparent 51%);pointer-events:none}
.ring{position:absolute;left:50%;top:50%;width:calc(var(--r)*2*var(--k));height:calc(var(--r)*2*var(--k));margin:calc(var(--r)*-1*var(--k)) 0 0 calc(var(--r)*-1*var(--k));border-radius:50%;border:1px dashed rgba(85,221,224,.22);pointer-events:none}
.globe{position:absolute;left:50%;top:50%;width:calc(230px*var(--k));height:calc(230px*var(--k));margin:calc(-115px*var(--k)) 0 0 calc(-115px*var(--k));display:flex;align-items:center;justify-content:center;filter:drop-shadow(0 0 28px rgba(85,221,224,.35))}
.globe img{width:100%;height:100%;object-fit:contain;display:block}
.globe-label{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);color:#edf2f7;font:700 13px var(--font);letter-spacing:.04em;white-space:nowrap;text-align:center;text-shadow:0 2px 8px rgba(0,0,0,.8)}
.orbit{position:absolute;left:50%;top:50%;width:0;height:0;animation:orbit var(--d) linear infinite;animation-delay:var(--delay)}
.sat-pos{position:absolute;left:0;top:0;transform:translate(calc(var(--r)*var(--k)),0)}
.skill{position:absolute;left:0;top:0;translate:-50% -50%;width:calc(var(--s)*var(--k));height:calc(var(--s)*var(--k));display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;text-align:center;border-radius:50%;padding:8px;box-sizing:border-box;font-weight:600;font-size:12px;line-height:1.2;background:#f5f5f5;color:#1b1b1b;box-shadow:0 0 0 2px rgba(255,255,255,.12),0 8px 24px rgba(0,0,0,.45);animation:orbit var(--d) linear infinite reverse;animation-delay:var(--delay);cursor:default;transition:box-shadow .25s}
.skill svg{opacity:.75}
.skill:hover{box-shadow:0 0 0 3px #55dde0,0 8px 24px rgba(0,0,0,.45);z-index:2}
.skill.sat{background:#55dde0;color:#06202a}
.skill.prod{background:#8fcb9b;color:#0f2a17}
.skill.meth{background:#e6ad63;color:#2d1a05}
.skill.soft{background:#edf2f7;color:#1b1b1b}
@keyframes orbit{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.orbit,.skill{animation-play-state:paused}}
.legend{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;margin-top:20px}

/* timelines */
.timeline{position:relative;width:75%;margin:0 auto}
.timeline .rail{position:absolute;left:36px;top:0;width:4px;height:100%;background:var(--line);border-radius:2px}
.timeline .rail i{display:block;width:100%;height:0;background:var(--fg);border-radius:2px}
.timeline ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:48px}
.timeline li{position:relative;padding-left:96px;opacity:0;transform:translateY(24px);transition:opacity .6s,transform .6s}
.timeline li.in{opacity:1;transform:none}
.timeline li::before{content:"";position:absolute;left:28px;top:4px;width:20px;height:20px;border-radius:50%;background:var(--accent);border:5px solid var(--bg);box-shadow:0 0 0 2px var(--fg)}
.timeline h3{font-size:22px}.timeline h3 span{color:var(--accent)}
.timeline .meta{font-weight:500;color:var(--muted);margin:4px 0 8px}
.timeline p{margin:0;font-size:15px;font-weight:500}

/* ---------- projects ---------- */
.proj-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:48px 32px}
.proj{position:relative;box-shadow:16px 16px 0 var(--fg);border:2px solid var(--fg);border-radius:28px;background:var(--bg);padding:24px;display:flex;flex-direction:column;gap:12px}
.proj.featured{grid-column:span 12;flex-direction:row;gap:40px;padding:40px}
.proj.half{grid-column:span 6}
.proj .fig{flex:1;border-radius:18px;overflow:hidden;background:#071526;min-height:260px;position:relative}
.proj .fig svg{width:100%;height:100%;display:block}
.proj .fig-btn{all:unset;cursor:pointer;flex:1;border-radius:18px;overflow:hidden;background:#fff;position:relative;display:flex;flex-direction:column;border:1px solid var(--line)}
.proj .fig-btn img{width:100%;flex:1;min-height:0;object-fit:contain;object-position:center;display:block;background:#fff;transition:transform .4s}
.proj .fig-btn:hover img{transform:scale(1.03)}
.proj .fig-btn:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.proj .fig-btn .cap{position:static;background:var(--dark);color:var(--light);padding:8px 14px;font-size:10px;line-height:1.4}
.proj.featured .fig-btn{min-height:380px}
.proj.half .fig-btn{aspect-ratio:4/3}
.proj .fig .cap{position:absolute;left:14px;bottom:12px;color:#9fb0c4}
.proj .body{flex:1;display:flex;flex-direction:column;gap:10px}
.proj .kind{color:var(--accent);font-weight:600;font-size:14px}
.proj h3{font-size:30px}.proj.half h3{font-size:22px}
.proj dl{margin:0;display:grid;grid-template-columns:120px minmax(0,1fr);gap:6px 12px;font-size:14px}
.proj dt{font-weight:700}.proj dd{margin:0;color:var(--muted);font-weight:500}
.status{display:inline-block;font:500 11px var(--mono);letter-spacing:.06em;text-transform:uppercase;padding:3px 8px;border-radius:6px;border:1px solid var(--line)}
.status.s-pub{color:#2e7d4a;border-color:#2e7d4a}html.dark .status.s-pub{color:var(--veg);border-color:var(--veg)}
.status.s-rev{color:#9a6420;border-color:#9a6420}html.dark .status.s-rev{color:var(--amber);border-color:var(--amber)}
.status.s-chk{color:var(--accent);border-color:var(--accent)}

/* ---------- publications ---------- */
.filters{display:flex;flex-direction:column;gap:10px;margin-bottom:32px}
.filters .row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.filters .row > span{width:70px;font-weight:700;font-size:13px}
.chip{min-height:36px;padding:0 14px;border-radius:999px;border:1px solid var(--fg);background:transparent;color:var(--fg);font:600 13px var(--font);cursor:pointer}
.chip[aria-pressed="true"]{background:var(--fg);color:var(--bg)}
.feat-pubs{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-bottom:48px}
.feat-pubs.cols3{grid-template-columns:repeat(3,minmax(0,1fr))}
.about-grid>*{min-width:0}
.proj dd,.pub,.pv,.feat-pub,.talk,.cert-body,table.sup td{overflow-wrap:anywhere}
.feat-pub{position:relative;box-shadow:14px 14px 0 var(--fg);border:2px solid var(--fg);border-radius:24px;padding:28px;background:var(--bg);display:flex;flex-direction:column;gap:10px}
.feat-pub h3{font-size:22px;line-height:1.3}
.pub-list{list-style:none;margin:0;padding:0}
.pub{display:grid;grid-template-columns:70px minmax(0,1fr) 180px;gap:24px;padding:22px 0;border-top:1px solid var(--line);align-items:start}
.pub.has-img{grid-template-columns:70px 150px minmax(0,1fr) 180px}
.pub-thumb{all:unset;cursor:pointer;display:block;border:2px solid var(--fg);border-radius:12px;overflow:hidden;aspect-ratio:1;background:#fff;transition:transform .2s,box-shadow .2s}
.pub-thumb img{width:100%;height:100%;object-fit:cover;object-position:top;display:block}
.pub-thumb:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--fg)}
.pub-thumb:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.pub-thumb.feat{aspect-ratio:16/10;margin:-8px -8px 6px;border-radius:14px}
.pub:hover .pt{color:var(--accent)}
.pt{font-weight:700;font-size:17px;line-height:1.35;transition:color .2s}
.pa{font-size:14px;color:var(--muted);font-weight:500;margin-top:6px}
.pa b{color:var(--fg);border-bottom:2px solid var(--accent)}
.pv{font-size:14px;font-style:italic;color:var(--muted);margin-top:4px}
.pub .side{display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.pub .yr{font:500 14px var(--mono)}
.talks{list-style:none;margin:0;padding:0}
.talk{display:grid;grid-template-columns:minmax(0,1fr) 180px;gap:24px;padding:18px 0;border-top:1px solid var(--line)}
.talk .tt{font-weight:700;font-size:15px}.talk .tv{font-size:13px;color:var(--muted);margin-top:4px}
.talk .tk{font:500 12px var(--mono);text-align:right;color:var(--muted)}

/* ---------- supervision table ---------- */
.table-wrap{overflow-x:auto;border:2px solid var(--fg);border-radius:18px;box-shadow:12px 12px 0 var(--fg);background:var(--bg)}
table.sup{width:100%;border-collapse:collapse;font-size:14px;min-width:860px}
table.sup th{text-align:left;font-size:12px;letter-spacing:.06em;text-transform:uppercase;padding:14px 16px;border-bottom:2px solid var(--fg);background:var(--card)}
table.sup td{padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top;font-weight:500}
table.sup tr:last-child td{border-bottom:0}
table.sup tr:hover td{background:var(--card)}
table.sup td:nth-child(2){min-width:320px}

/* ---------- certificates ---------- */
.ref-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;max-width:1000px;margin:0 auto}
.ref{display:flex;flex-direction:column;gap:6px;border:2px solid var(--fg);border-radius:20px;background:var(--bg);padding:28px 30px;box-shadow:10px 10px 0 var(--fg);transition:transform .2s,box-shadow .2s}
.ref:hover{transform:translate(-3px,-3px);box-shadow:13px 13px 0 var(--fg)}
.ref-head{display:flex;align-items:center;gap:18px;margin-bottom:6px}
.ref-photo{width:88px;height:88px;border-radius:50%;object-fit:cover;border:2px solid var(--fg);flex:none}
.ref h3{margin:0;font-size:22px;line-height:1.2}
.ref-status{margin:4px 0 0;font-weight:600}
.ref-inst{margin:0 0 14px;font-size:12px;color:var(--muted)}
.ref-contact{display:flex;flex-direction:column;gap:10px;border-top:1px solid var(--line);padding-top:16px}
.ref-contact a{display:flex;align-items:center;gap:10px;font-weight:500;color:inherit;text-decoration:none;overflow-wrap:anywhere}
.ref-contact a:hover span{text-decoration:underline}
.ref-contact svg{flex:none}
.cert-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}
.cert{all:unset;cursor:pointer;display:flex;flex-direction:column;border:2px solid var(--fg);border-radius:20px;background:var(--bg);overflow:hidden;box-shadow:10px 10px 0 var(--fg);transition:transform .2s,box-shadow .2s}
.cert:hover{transform:translate(-3px,-3px);box-shadow:14px 14px 0 var(--fg)}
.cert:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.cert-img{display:block;aspect-ratio:4/3;background:#e9e9e9;overflow:hidden;border-bottom:2px solid var(--fg)}
.cert-img img{width:100%;height:100%;object-fit:cover;object-position:top;transition:transform .4s}
.cert:hover .cert-img img{transform:scale(1.04)}
.cert-body{display:flex;flex-direction:column;gap:8px;padding:18px 20px 20px}
.cert-meta{display:flex;justify-content:space-between;align-items:center;gap:8px}
.cert-title{font-weight:700;font-size:15px;line-height:1.35}
.cert-org{font-size:13px;color:var(--muted);font-weight:500}
.lightbox{position:fixed;inset:0;z-index:200;background:rgba(10,10,10,.92);display:none;align-items:center;justify-content:center;padding:24px;flex-direction:column;gap:16px}
.lightbox.open{display:flex}
.lightbox img{max-width:min(1200px,100%);max-height:78vh;border-radius:8px;background:#fff}
.lb-stage{display:flex;align-items:center;gap:12px;max-width:100%}
.lb-nav{width:48px;height:48px;border-radius:50%;border:0;background:#f5f5f5;color:#1b1b1b;font-size:30px;line-height:1;cursor:pointer;flex:none}
.lb-nav:hover{background:var(--primary-dark)}
.cert-img{position:relative}
.cert-more{position:absolute;right:10px;bottom:10px;background:var(--fg);color:var(--bg);font:700 12px var(--mono);padding:4px 8px;border-radius:999px}
.lightbox figcaption{color:#f5f5f5;font-weight:500;text-align:center;max-width:900px;font-size:14px}
.lightbox .btn{background:#f5f5f5;color:#1b1b1b;border-color:#f5f5f5}

/* ---------- events ---------- */
.event-list{display:flex;flex-direction:column;gap:56px}
.event{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:44px;align-items:center}
.event.flip .event-img{order:2}
.event.noimg{grid-template-columns:1fr;max-width:860px;margin-inline:auto}
.event-img{all:unset;cursor:pointer;position:relative;display:block;border:2px solid var(--fg);border-radius:22px;overflow:hidden;box-shadow:14px 14px 0 var(--fg);aspect-ratio:4/3;background:var(--card);transition:transform .2s,box-shadow .2s}
.event-img:hover{transform:translate(-3px,-3px);box-shadow:18px 18px 0 var(--fg)}
.event-img:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
.event-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}
.event-img:hover img{transform:scale(1.04)}
.event-body{display:flex;flex-direction:column;gap:14px}
.event-meta{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.event-body h3{font-size:28px;line-height:1.2}
.event-body p{margin:0;font-weight:500;color:var(--muted);line-height:1.6}

/* ---------- reveal / footer ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
footer{position:relative;z-index:45;background:var(--bg);border-top:2px solid var(--fg);padding:32px 64px;display:flex;justify-content:space-between;align-items:center;font-weight:500;flex-wrap:wrap;gap:12px}
footer a{text-decoration:underline;text-underline-offset:3px}

@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}.anim-word{opacity:1;transform:none}}

/* ---------- responsive ---------- */
.cert-grid-wrap{}
@media (max-width:1100px){.cert-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.feat-pubs.cols3{grid-template-columns:repeat(2,minmax(0,1fr))}.wrap{padding:0 32px}header.nav{padding:18px 32px}.title{font-size:48px}.hero-txt h1{font-size:44px}.about-grid{grid-template-columns:1fr 1fr}.stats{grid-column:span 2;flex-direction:row;justify-content:space-around;text-align:center;align-items:center}.proj.half{grid-column:span 12}.skills{height:700px;--k:.78}}
@media (max-width:1180px){
  header .nav-links,header .socials{display:none}
  .burger{display:flex;order:2;margin-left:auto}
  .mobile-menu{display:none;position:fixed;inset:0;z-index:70;padding:0;background:rgba(27,27,27,.9);color:var(--light);backdrop-filter:blur(6px);flex-direction:column;align-items:center;justify-content:center;gap:28px;font-size:22px;font-weight:600}
  html.dark .mobile-menu{background:rgba(245,245,245,.9);color:var(--dark)}
  .mobile-menu.open{display:flex}
  .menu-close{position:absolute;top:18px;right:20px;width:44px;height:44px;border-radius:50%;border:0;background:var(--light);color:var(--dark);font-size:28px;line-height:1;cursor:pointer}
  html.dark .menu-close{background:var(--dark);color:var(--light)}
  .mobile-menu .nl{color:inherit}.mobile-menu .nl::after{background:currentColor}
  .mobile-menu .soc{color:inherit}.mobile-menu .lang{color:inherit;border-color:currentColor}
}
@media (max-width:800px){
  .ref-grid{grid-template-columns:1fr;gap:24px}.ref{padding:22px}
  .logo{position:static;transform:none;height:48px;font-size:13px;padding-right:14px}.logo img{width:40px;height:40px}
  .hero{grid-template-columns:1fr;text-align:center}.hero-txt h1{text-align:center;font-size:36px}.hero-cta{justify-content:center}
  .title{font-size:36px;margin-bottom:40px}section{padding:64px 0}.wrap{padding:0 20px}header.nav{padding:14px 20px}
  .about-grid{grid-template-columns:1fr}.stats{grid-column:auto}
  .skills{height:460px;--k:.44;border-radius:16px}.skill{width:calc(var(--s)*.62);height:calc(var(--s)*.62);font-size:8px;padding:3px;gap:0}.skill svg{width:9px;height:9px}.globe-label{font-size:10px;bottom:8px}
  .timeline{width:100%}.timeline li{padding-left:64px}.timeline .rail{left:20px}.timeline li::before{left:12px}
  .proj.featured{flex-direction:column;padding:24px}.proj h3{font-size:24px}
  .event{grid-template-columns:1fr;gap:24px}.event.flip .event-img{order:0}.event-body h3{font-size:22px}
  .cert-grid{grid-template-columns:1fr}.feat-pubs,.feat-pubs.cols3{grid-template-columns:1fr}
  .stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;text-align:center}.stats>div{align-items:center}.stats .num{font-size:36px}.stats .lbl{font-size:12px}
  .frame{max-width:280px}
  .table-wrap{border:0;box-shadow:none;background:transparent;overflow:visible}
  table.sup,table.sup tbody,table.sup tr,table.sup td{display:block;min-width:0;width:100%;box-sizing:border-box}
  table.sup thead{display:none}
  table.sup tr{border:2px solid var(--fg);border-radius:16px;background:var(--bg);box-shadow:8px 8px 0 var(--fg);margin-bottom:22px;padding:6px 0}
  table.sup td{padding:8px 16px;border:0}table.sup tr:hover td{background:transparent}
  table.sup td::before{content:attr(data-l);display:block;font:600 10px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:2px}
  table.sup td:nth-child(2){min-width:0}
  .lb-nav{width:40px;height:40px;font-size:24px}.lightbox{padding:12px}.lightbox img{max-height:70vh}
  .hero-aff{font-size:13px}.hero-txt h1{font-size:34px}.title{font-size:34px}.pub,.pub.has-img{grid-template-columns:1fr}.pub-thumb{max-width:220px}.talk{grid-template-columns:1fr}.talk .tk{text-align:left}
  .hireme{position:relative;left:auto;bottom:auto;margin:24px auto 0;width:140px;height:140px}  footer{padding:24px 20px}
}

/* ---------- opening screen (js/intro.js, home page, once per session) ---------- */
html.hg-lock,html.hg-lock body{overflow:hidden}
.hg-intro{position:fixed;inset:0;z-index:1000;background:#050505;color:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden;perspective:1200px;font-family:var(--font);transition:opacity .8s ease,filter .8s ease}
.hg-intro.hg-out{opacity:0;filter:blur(8px);pointer-events:none}
.hg-noise{position:absolute;inset:0;opacity:.15;mix-blend-mode:overlay;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E")}
.hg-orbs{position:absolute;inset:0;opacity:.5;pointer-events:none}
.hg-orbs i{position:absolute;width:70%;height:70%;border-radius:50%;filter:blur(150px);animation:hgPulse 6s ease-in-out infinite}
.hg-orbs i:first-child{top:-20%;left:-10%;background:rgba(30,58,138,.3)}
.hg-orbs i:last-child{bottom:-20%;right:-10%;background:rgba(49,46,129,.2);animation-delay:2s}
@keyframes hgPulse{0%,100%{opacity:1}50%{opacity:.5}}
.hg-grid{position:absolute;inset:0;pointer-events:none;will-change:transform;transform-origin:center bottom;transform:rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg)) scale(.01) rotateZ(45deg);opacity:0;transition:transform 1.8s cubic-bezier(.16,1,.3,1),opacity 1.8s cubic-bezier(.16,1,.3,1)}
.hg-in .hg-grid{transform:rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg)) scale(1) rotateZ(0deg);opacity:1}
.hg-in.hg-ready .hg-grid{transition:none}
.hg-layer{position:absolute;inset:0;width:100%;height:100%;display:block}
.hg-mask,.hg-warp-grid{position:absolute;inset:0}
.hg-warp-grid{opacity:0}
.hg-mask{-webkit-mask-image:radial-gradient(400px circle at 50% 50%,#8c8c8c,transparent);mask-image:radial-gradient(400px circle at 50% 50%,#8c8c8c,transparent)}
.hg-flash,.hg-dodge{position:absolute;inset:0;pointer-events:none;opacity:0;z-index:3}
.hg-flash{background:#fff;mix-blend-mode:overlay}
.hg-dodge{background:#3b82f6;mix-blend-mode:color-dodge}
.hg-content{position:relative;z-index:4;width:100%;max-width:1320px;height:100%;padding:0 64px;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);align-items:center;gap:24px}
.hg-text{display:flex;flex-direction:column;align-items:flex-start;gap:28px;text-align:left}
.hg-figure{position:relative;align-self:stretch;min-height:0}
.hg-globe{position:absolute;inset:4% -6% 0 -6%;width:112%;height:96%;-webkit-mask-image:radial-gradient(closest-side,#000 82%,transparent);mask-image:radial-gradient(closest-side,#000 82%,transparent)}
.hg-photo{position:absolute;left:50%;bottom:0;transform:translateX(-50%);height:min(82vh,900px);width:auto;max-width:none;filter:drop-shadow(0 30px 40px rgba(0,0,0,.55));-webkit-mask-image:linear-gradient(to bottom,#000 78%,transparent);mask-image:linear-gradient(to bottom,#000 78%,transparent)}
.hg-item{opacity:0;transform:translateY(40px);filter:blur(10px);transition:opacity .9s ease,transform 1s cubic-bezier(.2,.8,.2,1),filter .9s ease}
.hg-in .hg-item{opacity:1;transform:none;filter:blur(0)}
.hg-in .hg-item:nth-child(1){transition-delay:.3s}.hg-in .hg-item:nth-child(2){transition-delay:.5s}.hg-in .hg-item:nth-child(3){transition-delay:.7s}.hg-in .hg-item:nth-child(4){transition-delay:.9s}
.hg-badge{display:inline-flex;align-items:center;gap:10px;padding:7px 16px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);backdrop-filter:blur(12px);box-shadow:inset 0 1px 0 rgba(255,255,255,.1);font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:#dbeafe}
.hg-dot{position:relative;width:10px;height:10px;display:inline-flex}
.hg-dot i,.hg-dot b{position:absolute;inset:0;border-radius:50%;background:#60a5fa}
.hg-dot i{animation:hgPing 1.4s cubic-bezier(0,0,.2,1) infinite;opacity:.75}
.hg-dot b{background:#3b82f6}
@keyframes hgPing{75%,100%{transform:scale(2.2);opacity:0}}
.hg-name{margin:0;font-size:clamp(48px,8.2vw,132px);line-height:1;font-weight:800;letter-spacing:-.045em;padding-bottom:8px;background:linear-gradient(to bottom,#fff,#e5e5e5 50%,#737373);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 20px 30px rgba(0,0,0,.6))}
.hg-name span{display:inline-block}
.hg-sub{margin:0;max-width:560px;font-size:clamp(16px,2vw,22px);font-weight:400;line-height:1.6;color:#a3a3a3}
.hg-cta{padding-top:12px;display:flex;flex-direction:column;align-items:center;gap:16px}
.hg-btn{position:relative;display:inline-flex;align-items:center;gap:12px;padding:18px 36px;border-radius:999px;border:1px solid rgba(255,255,255,.2);background:rgba(10,10,10,.7);backdrop-filter:blur(20px);color:#fff;font:600 19px var(--font);letter-spacing:-.01em;cursor:pointer;overflow:hidden;box-shadow:0 0 60px rgba(79,70,229,.35),0 25px 50px rgba(0,0,0,.5);transition:transform .2s,box-shadow .3s}
.hg-btn:hover{transform:scale(1.03);box-shadow:0 0 80px rgba(79,70,229,.55),0 25px 50px rgba(0,0,0,.5)}
.hg-btn:active{transform:scale(.97)}
.hg-btn:focus-visible{outline:2px solid #93c5fd;outline-offset:4px}
.hg-btn span{position:relative;z-index:1}
.hg-btn svg{position:relative;z-index:1;width:22px;height:22px;color:#93c5fd;transition:transform .3s}
.hg-btn:hover svg{transform:translateX(4px)}
.hg-btn em{position:absolute;inset:0;transform:translateX(-100%);background:linear-gradient(90deg,transparent,rgba(255,255,255,.25),transparent);animation:hgShimmer 2.2s infinite}
@keyframes hgShimmer{100%{transform:translateX(100%)}}
.hg-hint{margin:0;font:500 11px var(--mono);letter-spacing:.2em;text-transform:uppercase;color:#525252}
.hg-in .hg-figure{transition-delay:.6s}
@media (max-width:900px){.hg-content{grid-template-columns:1fr;grid-template-rows:minmax(0,46%) auto;padding:0 22px 28px;gap:0}.hg-figure{order:-1}.hg-photo{height:100%}.hg-text{gap:16px;align-items:center;text-align:center}.hg-name br{display:none}.hg-name span{display:inline}.hg-name{font-size:clamp(38px,11vw,72px)}.hg-sub{font-size:15px}.hg-badge{font-size:10px}.hg-btn{padding:15px 26px;font-size:16px}.hg-hint{display:none}}
@media (prefers-reduced-motion:reduce){.hg-grid,.hg-item{transition:none!important}.hg-orbs i,.hg-dot i,.hg-btn em{animation:none}}

/* fluid ink cursor (js/splash-cursor.js) */
.splash-cursor{position:fixed;inset:0;pointer-events:none;z-index:1100}
.splash-cursor__canvas{display:block;width:100%;height:100%}

/* soft navigation fade (js/main.js) */
main{transition:opacity .2s ease,transform .25s ease}
main.page-leave{opacity:0;transform:translateY(8px)}
main.page-enter{opacity:0;transform:translateY(-8px);transition:none}