:root{
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"URW Palladio L",P052,"Book Antiqua",Georgia,"Times New Roman",serif;
  --sans:"Avenir Next","Segoe UI Variable Text","Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono","Cascadia Code","JetBrains Mono",Menlo,Consolas,monospace;
  /* pastel palette, red first */
  --bg:#fff6f3; --surface:#ffffff; --alt:#ffe8e3; --text:#2b1517; --muted:#7a5a5c; --border:#f4cfc9;
  --c1:#ffc7b6; --c2:#ff9fb3; --c3:#ff6b70; --lilac:#e8dcff;
  --accent:#c8353d; --btn:#ff8f8a; --btn-ink:#2b1517; --glow:255,107,112;
  --shadow:0 18px 40px -18px rgba(200,53,61,.30); --radius:22px; color-scheme:only light;
}
*{box-sizing:border-box} html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;background:transparent;color:var(--text);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:90;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>")}
html[data-lang="es"] [lang="en"], html[data-lang="en"] [lang="es"]{display:none}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
em{font-family:var(--serif);font-style:italic}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:8px}
.mono{font-family:var(--mono);letter-spacing:.02em}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-999px;top:8px;background:var(--btn);color:var(--btn-ink);padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:12px}
.progress{position:fixed;left:0;top:0;height:3px;width:100%;transform:scaleX(0);transform-origin:left;z-index:120;background:linear-gradient(90deg,#ffffff,#ffd9d3)}
/* nav: solid red header */
.nav{position:sticky;top:0;z-index:60;background:linear-gradient(180deg,#c4161f,#9f0f1a);border-bottom:1px solid rgba(255,255,255,.16);box-shadow:0 10px 28px -14px rgba(110,8,18,.65)}
.nav-in{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;text-decoration:none!important}
.logo{display:block;width:38px;height:38px;border-radius:50%;padding:2px;background:conic-gradient(#fff,#ffd6d0,#fff,#ffd6d0,#fff)}
.logo img{width:100%;height:100%;border-radius:50%;object-fit:cover;border:2px solid #b3131d}
.nav nav{margin-left:auto;display:flex;gap:2px}
.nav nav a{position:relative;color:rgba(255,255,255,.86);padding:8px 11px;border-radius:8px;font-size:.92rem}
.nav nav a:hover{color:#fff;background:rgba(255,255,255,.14);text-decoration:none}
.nav nav a[aria-current="true"]{color:#fff}
.nav nav a[aria-current="true"]::after{content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;border-radius:2px;background:#fff}
.lang{border:1px solid rgba(255,255,255,.55);background:rgba(255,255,255,.16);color:#fff;border-radius:999px;padding:6px 13px;font:700 .78rem var(--mono);cursor:pointer}
.lang:hover{background:rgba(255,255,255,.3)}
.nav :focus-visible{outline-color:#fff}
@media (max-width:760px){.nav nav{display:none}.lang{margin-left:auto}}
/* hero */
.hero{position:relative;padding:70px 0 90px;overflow:hidden;isolation:isolate}
#flow{position:absolute;inset:0;width:100%;height:100%;z-index:-1}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(60% 70% at 78% 40%,rgba(var(--glow),.16),transparent 70%),radial-gradient(50% 60% at 5% 90%,color-mix(in srgb,var(--lilac) 40%,transparent),transparent 70%)}
.hero-in{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:center}
.eyebrow{margin:0 0 10px;color:var(--accent);font-weight:700;font-size:.9rem}
h1{font-family:var(--serif);font-weight:700;font-size:clamp(3.2rem,9.5vw,6.6rem);line-height:.95;margin:0;letter-spacing:-.035em}
h1 .w{display:inline-block}
h1 em{font-weight:400;background:linear-gradient(100deg,var(--c3),var(--c2) 55%,var(--c1));-webkit-background-clip:text;background-clip:text;color:transparent;padding-right:.06em}
.role{margin:16px 0 0;font:600 clamp(1.15rem,2.6vw,1.55rem)/1.3 var(--mono);color:var(--text);min-height:1.5em}
.rotor{display:inline-block;transition:opacity .35s,transform .35s}
.rotor.out{opacity:0;transform:translateY(8px)}
.caret{display:inline-block;width:.55ch;height:1.05em;margin-left:4px;vertical-align:-.15em;background:var(--c3);animation:blink 1s steps(2,start) infinite}
@keyframes blink{to{visibility:hidden}}
.lead{font-size:1.15rem;color:var(--muted);max-width:33em;margin:20px 0}
.chips{list-style:none;margin:0 0 24px;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.chips li{border:1px solid var(--border);background:color-mix(in srgb,var(--surface) 85%,transparent);padding:6px 13px;border-radius:999px;font-size:.86rem;font-weight:600;backdrop-filter:blur(6px)}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin:0}
.btn{display:inline-flex;align-items:center;gap:4px;padding:12px 19px;border-radius:14px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-weight:700;font-size:.95rem;text-decoration:none!important;transition:box-shadow .2s,border-color .2s,background .2s;will-change:transform}
.btn .ico{flex:none;margin-right:2px}
.btn:hover{box-shadow:var(--shadow);border-color:var(--c3)}
.btn.primary{background:var(--btn);color:var(--btn-ink);border-color:var(--btn)}
.portrait{position:relative;margin:0;justify-self:center;width:min(360px,82%);aspect-ratio:1}
.portrait picture,.portrait img{position:absolute;inset:11px;width:calc(100% - 22px);height:calc(100% - 22px);border-radius:50%;object-fit:cover}
.ring{position:absolute;inset:0;border-radius:50%;background:conic-gradient(from 0deg,var(--c1),var(--c2),var(--c3),var(--c2),var(--c1));animation:spin 14s linear infinite;box-shadow:0 0 80px -10px rgba(var(--glow),.5)}
.ring::after{content:"";position:absolute;inset:3px;border-radius:50%;background:var(--bg)}
@keyframes spin{to{transform:rotate(360deg)}}
@media (max-width:820px){.hero-in{grid-template-columns:1fr}.portrait{order:-1;width:min(230px,58%);justify-self:start}}
/* entrance */
@keyframes rise{from{opacity:0;transform:translateY(34px) rotate(1.2deg)}to{opacity:1;transform:none}}
.w1{animation:rise .9s cubic-bezier(.2,.8,.2,1) .05s both}.w2{animation:rise .9s cubic-bezier(.2,.8,.2,1) .2s both}
.hero-text>*:not(h1){animation:rise .9s cubic-bezier(.2,.8,.2,1) .4s both}
.portrait{animation:rise 1s cubic-bezier(.2,.8,.2,1) .3s both}
/* sections */
.sec{padding:96px 0}
.label{margin:0 0 8px;color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:.14em;font-size:.74rem}
h2{font-family:var(--serif);font-size:clamp(2rem,5vw,3.2rem);line-height:1.05;margin:0 0 34px;letter-spacing:-.025em}
h2.huge{font-size:clamp(2.6rem,8vw,5.6rem)}
h3{margin:0 0 6px;font-size:1.15rem}
.muted{color:var(--muted)}.small{font-size:.9rem}
.js .rv{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.8,.2,1),transform .8s cubic-bezier(.2,.8,.2,1);transition-delay:var(--d,0s)}
.js .rv.in{opacity:1;transform:none}
/* spotlight */
.spot{position:relative;overflow:hidden}
.spot::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .3s;z-index:2;background:radial-gradient(260px circle at var(--mx,50%) var(--my,50%),rgba(var(--glow),.16),transparent 65%)}
.spot:hover::before{opacity:1}
/* bento */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.tile{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.t-about{grid-column:span 4;grid-row:span 2}
.t-about .big{font-family:var(--serif);font-size:clamp(1.25rem,2.4vw,1.7rem);line-height:1.35;margin:0 0 16px;letter-spacing:-.01em}
.t-about p{margin:0 0 12px;color:var(--muted)}.t-about .big{color:var(--text)}
.t-stat{grid-column:span 2;display:flex;flex-direction:column;justify-content:center;gap:4px}
.t-stat .num{font-family:var(--serif);font-size:clamp(2.4rem,6vw,3.8rem);line-height:1;letter-spacing:-.03em;background:linear-gradient(120deg,var(--c3),var(--c2));-webkit-background-clip:text;background-clip:text;color:transparent}
.t-stat.alt{grid-column:span 3}
.t-stat.alt .num{background:linear-gradient(120deg,var(--c2),var(--c1));-webkit-background-clip:text;background-clip:text}
.t-stat span{color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.08em}
.t-stack{grid-column:span 6;padding:18px 0 20px;overflow:hidden}
.t-stack .mini{margin:0 0 12px 24px;color:var(--muted);font-size:.74rem;text-transform:uppercase;letter-spacing:.14em}
.marquee{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee ul{list-style:none;margin:0;padding:0;display:flex;gap:10px;width:max-content;animation:scroll 46s linear infinite}
.marquee:hover ul{animation-play-state:paused}
.marquee li{border:1px solid var(--border);background:var(--alt);padding:6px 14px;border-radius:999px;font:600 .85rem var(--mono);white-space:nowrap}
@keyframes scroll{to{transform:translateX(-50%)}}
@media (max-width:820px){.bento{grid-template-columns:repeat(2,1fr)}.t-about{grid-column:span 2;grid-row:auto}.t-stat,.t-stat.alt{grid-column:span 1}.t-stack{grid-column:span 2}}
/* course */
.course{display:grid;grid-template-columns:auto 1fr;gap:34px;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:28px;padding:34px;box-shadow:var(--shadow)}
.course-num{font-family:var(--serif);font-size:clamp(6rem,16vw,11rem);line-height:.8;font-weight:700;color:transparent;-webkit-text-stroke:2px var(--c3);opacity:.9;letter-spacing:-.04em}
.course h3{font-size:clamp(1.3rem,3vw,1.8rem);margin:12px 0 6px;font-family:var(--serif);line-height:1.15}
.pill{display:inline-block;margin:0;padding:4px 12px;border-radius:999px;background:rgba(var(--glow),.16);color:var(--accent);font-weight:700;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase}
.steps{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:14px 0;padding:0}
.steps li{border:1px dashed var(--border);padding:4px 11px;border-radius:8px;font-size:.78rem;color:var(--muted)}
@media (max-width:760px){.course{grid-template-columns:1fr;gap:6px;padding:24px}.course-num{font-size:5.5rem}}
/* filters + badges */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 24px}
.chip{border:1px solid var(--border);background:var(--surface);color:var(--text);padding:7px 15px;border-radius:999px;font:700 .82rem var(--mono);cursor:pointer;transition:background .2s,color .2s,border-color .2s}
.chip:hover{border-color:var(--c3)}
.chip.on{background:var(--btn);color:var(--btn-ink);border-color:var(--btn)}
.badges{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(158px,1fr));gap:16px}
.badges li[hidden]{display:none}
.tilt{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 12px 14px;text-align:center;transform:perspective(700px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));transition:transform .18s ease-out,border-color .2s,box-shadow .2s;overflow:hidden}
.tilt:hover{border-color:var(--c3);box-shadow:var(--shadow)}
.tilt::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .25s;background:radial-gradient(180px circle at var(--mx,50%) var(--my,50%),rgba(255,255,255,.24),transparent 60%);mix-blend-mode:soft-light}
.tilt:hover::after{opacity:1}
.badges img{height:132px;width:auto;margin:0 auto 10px;object-fit:contain;filter:drop-shadow(0 8px 12px rgba(120,30,40,.22))}
.cap{display:block;font-size:.84rem;line-height:1.3}.cap small{display:block;color:var(--muted);margin-top:2px;font-family:var(--mono);font-size:.72rem}
/* projects */
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);transition:border-color .2s,box-shadow .2s}
.card:hover{border-color:var(--c3);box-shadow:var(--shadow)}
.project{grid-column:span 3;display:flex;flex-direction:column;padding:0}
.project.feat{grid-column:span 6}
.cover{display:block;aspect-ratio:16/9;background:var(--alt);overflow:hidden;border-bottom:1px solid var(--border)}
.cover img{width:100%;height:100%;object-fit:contain;padding:6%;transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.cover.art img{object-fit:cover;padding:0}
.project:hover .cover img{transform:scale(1.05)}
.pbody{padding:20px 24px 24px;display:flex;flex-direction:column;gap:6px}
.project h3{font-family:var(--serif);font-size:1.5rem;margin:2px 0 2px}.project h3 a{color:var(--text)}
.project .ext{color:var(--accent);margin-left:6px;display:inline-block;transition:transform .2s}
.project:hover .ext{transform:translate(3px,-3px)}
.project p{margin:0;color:var(--muted);font-size:.96rem}.project .tag-line{color:var(--accent);font:700 .72rem var(--mono);text-transform:uppercase;letter-spacing:.08em}
.feat-tag{background:rgba(var(--glow),.18);padding:2px 8px;border-radius:6px;margin-right:6px}
.more{margin:26px 0 0}
@media (max-width:900px){.project,.project.feat{grid-column:span 12}}
@media (min-width:901px) and (max-width:1100px){.project{grid-column:span 6}}
.cover.c-pinevision{background:#faf8f6}
.cover.c-pinecount-ai{background:#f0f0f0}
.cover.c-optimml{background:#efefef}
.cover.c-aiedu{background:#eeeeef}

/* contact + footer */
.contact{text-align:center}.contact .cta{justify-content:center;margin-top:22px}
.contact h2{margin-bottom:12px}.contact h2 em{background:linear-gradient(100deg,var(--c3),var(--c2) 55%,var(--c1));-webkit-background-clip:text;background-clip:text;color:transparent;padding-right:.08em}
.contact-sec{padding-bottom:110px}
.foot{border-top:1px solid var(--border);padding:22px 0;color:var(--muted);font-size:.9rem}
.foot-in{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.foot p{margin:0}
/* teaching */
.program{background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:28px 30px;box-shadow:var(--shadow);margin-bottom:18px}
.program h3{font-family:var(--serif);font-size:clamp(1.4rem,3.2vw,2rem);line-height:1.15;margin:12px 0 8px}
.program p.muted{margin:0;max-width:62ch}
.mods{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:18px}
.mod{background:var(--surface);border:1px solid var(--border);border-radius:22px;padding:22px 20px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.mod:nth-child(2){--d:.08s}.mod:nth-child(3){--d:.16s}.mod:nth-child(4){--d:.24s}
.mod-n{font-family:var(--serif);font-size:3.6rem;line-height:.9;font-weight:700;color:transparent;-webkit-text-stroke:1.5px var(--c3);letter-spacing:-.04em;margin-bottom:10px}
.mod h4{font-family:var(--serif);font-size:1.08rem;line-height:1.25;margin:0 0 10px}
.mod ul{margin:0;padding-left:18px;color:var(--muted);font-size:.9rem;display:grid;gap:5px}
.mod .now{margin:auto 0 0;padding-top:14px;font-size:.72rem;color:var(--accent);font-weight:700}
.mod:last-child{border-color:var(--c3)}
.yt-player{position:relative;width:min(260px,64vw);aspect-ratio:9/16;border-radius:20px;overflow:hidden;background:#0a0d18;box-shadow:0 18px 44px -18px rgba(110,8,18,.55)}
.yt-play,.yt-player iframe{position:absolute;inset:0;width:100%;height:100%;border:0;padding:0;margin:0}
.yt-play{cursor:pointer;background:none}
.yt-play img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}
.yt-play:hover img{transform:scale(1.04)}
.yt-btn{position:absolute;left:50%;top:50%;width:64px;height:64px;margin:-32px 0 0 -32px;border-radius:50%;background:#c4161f;box-shadow:0 8px 24px rgba(0,0,0,.4);transition:transform .2s}
.yt-btn::after{content:"";position:absolute;left:25px;top:19px;border-style:solid;border-width:13px 0 13px 22px;border-color:transparent transparent transparent #fff}
.yt-play:hover .yt-btn{transform:scale(1.1)}
@media (max-width:980px){.mods{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.mods{grid-template-columns:1fr}.program{padding:22px}}
/* about v2 + research */
.t-about .big mark{color:inherit;background:linear-gradient(transparent 60%,rgba(var(--glow),.3) 60%);padding:0 .12em;border-radius:3px}
/* youtube stage */
.yt2{position:relative;overflow:hidden;display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center;padding:40px 48px;border-radius:30px;color:#fff;background:radial-gradient(120% 140% at 85% 20%,#d4202b 0%,#a30f1b 42%,#5e0812 100%);box-shadow:0 30px 60px -28px rgba(110,8,18,.7)}
.yt2-sky{position:absolute;inset:0;pointer-events:none}
.yt2-sky i{position:absolute;width:var(--s,14px);height:var(--s,14px);background:rgba(255,255,255,.75);clip-path:polygon(50% 0,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%);animation:twinkle 3.2s ease-in-out infinite;animation-delay:var(--dl,0s)}
.yt2-sky i:nth-child(1){left:6%;top:14%;--s:12px}.yt2-sky i:nth-child(2){left:42%;top:8%;--s:18px;--dl:.7s}.yt2-sky i:nth-child(3){left:30%;top:80%;--s:10px;--dl:1.3s}.yt2-sky i:nth-child(4){left:52%;top:62%;--s:14px;--dl:.3s}.yt2-sky i:nth-child(5){left:90%;top:10%;--s:10px;--dl:1.9s}.yt2-sky i:nth-child(6){left:4%;top:68%;--s:16px;--dl:1s}.yt2-sky i:nth-child(7){left:95%;top:78%;--s:12px;--dl:2.3s}
@keyframes twinkle{0%,100%{opacity:.25;transform:scale(.7) rotate(0)}50%{opacity:1;transform:scale(1.15) rotate(18deg)}}
.yt2-text{position:relative;z-index:1}
.yt2-kicker{margin:0 0 12px;font-size:.74rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:#ffd0cc}
.yt2 h3{font-family:var(--serif);font-size:clamp(2rem,5vw,3.2rem);line-height:1.02;margin:0 0 12px;letter-spacing:-.02em}
.yt2-d{margin:0 0 18px;max-width:34ch;font-size:1.05rem;line-height:1.5;color:#ffe3e0}
.yt2-chips{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0 0 24px;padding:0}
.yt2-chips li{padding:5px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.12);font-size:.74rem;letter-spacing:.04em}
.yt2-cta{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;border-radius:999px;background:#fff;color:#a30f1b;font-weight:800;text-decoration:none!important;box-shadow:0 12px 26px -10px rgba(0,0,0,.45);transition:transform .2s,box-shadow .2s}
.yt2-cta:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 18px 30px -10px rgba(0,0,0,.5)}
.yt2-cta b{width:0;height:0;border-style:solid;border-width:7px 0 7px 12px;border-color:transparent transparent transparent #c4161f}
.phone{position:relative;justify-self:center;padding:9px;border-radius:40px;background:linear-gradient(145deg,#3a0c14,#14070a);box-shadow:0 30px 50px -18px rgba(0,0,0,.55),inset 0 0 0 1px rgba(255,255,255,.12);transform:rotate(3deg);animation:bob 6s ease-in-out infinite}
.phone::before{content:"";position:absolute;left:50%;top:15px;width:54px;height:6px;margin-left:-27px;border-radius:6px;background:rgba(0,0,0,.65);z-index:3}
.phone-glow{position:absolute;inset:-26px;border-radius:60px;background:radial-gradient(closest-side,rgba(255,190,180,.55),transparent);filter:blur(14px);z-index:-1}
.phone .yt-player{border-radius:32px;box-shadow:none;width:min(250px,60vw)}
@keyframes bob{0%,100%{transform:translateY(0) rotate(3deg)}50%{transform:translateY(-10px) rotate(1deg)}}
.yt-btn::before{content:"";position:absolute;inset:-8px;border-radius:50%;border:2px solid rgba(255,255,255,.7);animation:ring 2s ease-out infinite}
@keyframes ring{0%{transform:scale(.85);opacity:.9}100%{transform:scale(1.5);opacity:0}}
@media (max-width:760px){.yt2{grid-template-columns:1fr;padding:28px 24px;gap:26px}.yt2-d{max-width:none}}
/* papers timeline */
.tl{--p:0;list-style:none;margin:0;padding:6px 0;position:relative;display:grid;gap:40px}
.tl::before,.tl::after{content:"";position:absolute;left:50%;top:0;width:3px;margin-left:-1.5px;border-radius:3px}
.tl::before{bottom:0;background:var(--border)}
.tl::after{height:calc(var(--p) * 100%);background:linear-gradient(180deg,#ff6b70,#c4161f);transition:height .15s linear}
.tl-item{position:relative;display:grid;grid-template-columns:1fr 1fr;column-gap:76px;align-items:center}
.tl-node{position:absolute;left:50%;top:50%;width:30px;height:30px;margin:-15px 0 0 -15px;background:var(--border);clip-path:polygon(50% 0,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%);transition:background .4s,transform .5s cubic-bezier(.3,1.6,.5,1);transform:scale(.7);z-index:2}
.tl-item.on .tl-node{background:#c4161f;transform:scale(1.25)}
.tl-item.left .tl-card{grid-column:1;grid-row:1}.tl-item.left .tl-when{grid-column:2;grid-row:1;text-align:left}
.tl-item.right .tl-card{grid-column:2;grid-row:1}.tl-item.right .tl-when{grid-column:1;grid-row:1;text-align:right}
.tl-when{display:flex;flex-direction:column;gap:4px}
.tl-item.right .tl-when{align-items:flex-end}
.tl-when time{font-family:var(--serif);font-size:clamp(1.8rem,4vw,2.8rem);font-weight:700;line-height:1;color:transparent;-webkit-text-stroke:1.5px var(--c3);letter-spacing:-.02em}
.tl-when>span{font-size:.74rem;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.tl-card{background:var(--surface);border:1px solid var(--border);border-radius:22px;padding:22px 24px;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s,border-color .3s}
.tl-card:hover{transform:translateY(-4px);border-color:var(--c3);box-shadow:0 22px 40px -22px rgba(196,22,31,.45)}
.tl-card h3{font-family:var(--serif);font-size:clamp(1.05rem,2vw,1.3rem);line-height:1.25;margin:0 0 8px}
.tl-card p{margin:0 0 14px;color:var(--muted);font-size:.95rem;line-height:1.5}
.tl-link{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:.9rem;color:var(--accent);text-decoration:none!important;border-bottom:2px solid rgba(var(--glow),.4);padding-bottom:1px}
.tl-link i{font-style:normal;transition:transform .2s}.tl-link:hover i{transform:translate(2px,-2px)}
@media (max-width:760px){
  .tl::before,.tl::after{left:15px}
  .tl-item{grid-template-columns:1fr;padding-left:44px;row-gap:10px}
  .tl-node{left:15px;top:30px;margin-top:0}
  .tl-item .tl-when,.tl-item.left .tl-when,.tl-item.right .tl-when{grid-column:1;grid-row:1;text-align:left;align-items:flex-start;flex-direction:row;align-items:baseline;gap:10px;flex-wrap:wrap}
  .tl-item .tl-card,.tl-item.left .tl-card,.tl-item.right .tl-card{grid-column:1;grid-row:2}
  .tl-when time{font-size:1.7rem}
}
/* bg-v5: layered background */
html{background:var(--bg)}
html::before{content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30'%3E%3Ccircle cx='2' cy='2' r='1.2' fill='%23c4161f' opacity='.16'/%3E%3C/svg%3E") 0 0/30px 30px;-webkit-mask-image:radial-gradient(120% 90% at 50% 0%,#000 25%,transparent 80%);mask-image:radial-gradient(120% 90% at 50% 0%,#000 25%,transparent 80%)}
body{background:transparent}
body::before{content:"";position:fixed;inset:-25%;z-index:-1;pointer-events:none;will-change:transform;
  background:
    radial-gradient(34% 30% at 14% 18%,rgba(255,107,112,.30),transparent 70%),
    radial-gradient(30% 28% at 86% 12%,rgba(255,159,179,.34),transparent 70%),
    radial-gradient(36% 32% at 78% 62%,rgba(255,199,182,.46),transparent 70%),
    radial-gradient(32% 30% at 10% 74%,rgba(228,190,255,.30),transparent 70%),
    radial-gradient(28% 26% at 52% 94%,rgba(255,107,112,.22),transparent 70%);
  animation:aurora 34s ease-in-out infinite alternate}
@keyframes aurora{0%{transform:translate3d(-2%,-1%,0) scale(1)}50%{transform:translate3d(3%,2%,0) scale(1.08)}100%{transform:translate3d(-1%,3%,0) scale(1.02)}}
.sec{position:relative;overflow:hidden;isolation:isolate}
.sec>.wrap{position:relative;z-index:1}
.sec::before{content:"";position:absolute;z-index:0;pointer-events:none;width:420px;height:420px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpolygon points='50.0,6.0 62.2,35.3 93.7,37.8 69.7,58.4 77.0,89.2 50.0,72.7 23.0,89.2 30.3,58.4 6.3,37.8 37.8,35.3' fill='none' stroke='%23ff6b70' stroke-width='1.1' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;opacity:.34;animation:spin 90s linear infinite}
.sec::after{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='340' height='340'%3E%3Cpolygon points='42.1,43.3 42.5,48.1 47.0,49.9 42.6,51.8 42.3,56.6 39.1,53.0 34.4,54.2 36.9,50.0 34.3,46.0 39.0,47.0' fill='%23ff9fb3' opacity='.55'/%3E%3Cpolygon points='210.0,31.0 211.3,34.2 214.8,34.5 212.1,36.7 212.9,40.0 210.0,38.2 207.1,40.0 207.9,36.7 205.2,34.5 208.7,34.2' fill='%23ff6b70' opacity='.38'/%3E%3Cpolygon points='290.1,122.6 288.8,128.6 293.6,132.5 287.5,133.2 285.3,139.0 282.7,133.3 276.5,133.0 281.1,128.9 279.5,122.9 284.9,126.0' fill='%23ffc7b6' opacity='.8'/%3E%3Cpolygon points='121.2,184.1 122.0,188.2 126.0,189.3 122.4,191.3 122.5,195.5 119.5,192.6 115.6,194.1 117.3,190.3 114.8,187.0 118.9,187.5' fill='%23ff6b70' opacity='.28'/%3E%3Cpolygon points='66.3,275.0 63.6,279.8 66.7,284.4 61.3,283.4 57.9,287.7 57.2,282.2 52.0,280.3 57.0,278.0 57.2,272.5 61.0,276.5' fill='%23ff9fb3' opacity='.5'/%3E%3Cpolygon points='251.9,275.4 251.9,278.8 255.0,280.4 251.7,281.5 251.1,284.9 249.1,282.1 245.7,282.6 247.8,279.8 246.2,276.7 249.5,277.8' fill='%23c4161f' opacity='.16'/%3E%3C/svg%3E") 0 0/340px 340px;opacity:.7;-webkit-mask-image:linear-gradient(180deg,transparent,#000 18%,#000 82%,transparent);mask-image:linear-gradient(180deg,transparent,#000 18%,#000 82%,transparent)}
#about::before{right:-110px;top:30px}#teaching::before{left:-140px;bottom:40px}#research::before{right:-120px;top:120px;width:360px;height:360px}#certs::before{left:-120px;top:40px}#projects::before{right:-130px;bottom:50px}#contact::before{left:50%;top:10px;margin-left:-210px}
@keyframes spin{to{transform:rotate(360deg)}}
.alt{background:linear-gradient(180deg,transparent 0,rgba(255,226,220,.92) 110px,rgba(255,222,214,.92) calc(100% - 110px),transparent 100%)}
.hero::before{opacity:.9;-webkit-mask-image:linear-gradient(180deg,#000 60%,transparent);mask-image:linear-gradient(180deg,#000 60%,transparent)}
.t-about{display:flex;flex-direction:column;justify-content:center}
.t-about .big{font-size:clamp(1.4rem,2.8vw,2rem);margin:0}
.foot{background:linear-gradient(180deg,transparent,rgba(255,226,220,.7))}
@media (max-width:760px){.sec::before{width:260px;height:260px}.alt{background:linear-gradient(180deg,transparent 0,rgba(255,226,220,.94) 70px,rgba(255,222,214,.94) calc(100% - 70px),transparent 100%)}}
.chips li,.chip-a{display:inline-flex;align-items:center;gap:8px}
.chips li{padding-left:9px}
.co{height:26px;width:auto;flex:none;display:block}
.chip-a{color:inherit;text-decoration:none!important}.chip-a i{font-style:normal;color:var(--accent);margin-left:2px}
.chips li:has(.chip-a){transition:border-color .2s,box-shadow .2s,transform .2s}.chips li:has(.chip-a):hover{border-color:var(--c3);box-shadow:var(--shadow);transform:translateY(-2px)}
.program-link{margin:14px 0 0}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}
  .js .rv{opacity:1;transform:none}.marquee ul{flex-wrap:wrap;width:auto;padding:0 24px}.marquee{mask-image:none;-webkit-mask-image:none}
}