/* ------------------------------------------------------------------ fonts */
@font-face{font-family:Geist;font-style:normal;font-weight:400;font-display:swap;
  src:url(fonts/Geist-400-latin.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Geist;font-style:normal;font-weight:400;font-display:swap;
  src:url(fonts/Geist-400-cyrillic.woff2) format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:Geist;font-style:normal;font-weight:500;font-display:swap;
  src:url(fonts/Geist-500-latin.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Geist;font-style:normal;font-weight:500;font-display:swap;
  src:url(fonts/Geist-500-cyrillic.woff2) format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:Geist;font-style:normal;font-weight:600;font-display:swap;
  src:url(fonts/Geist-600-latin.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Geist;font-style:normal;font-weight:600;font-display:swap;
  src:url(fonts/Geist-600-cyrillic.woff2) format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:Geist;font-style:normal;font-weight:700;font-display:swap;
  src:url(fonts/Geist-700-latin.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Geist;font-style:normal;font-weight:700;font-display:swap;
  src:url(fonts/Geist-700-cyrillic.woff2) format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Geist Mono';font-style:normal;font-weight:500;font-display:swap;
  src:url(fonts/GeistMono-500-latin.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Geist Mono';font-style:normal;font-weight:500;font-display:swap;
  src:url(fonts/GeistMono-500-cyrillic.woff2) format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}

/* ----------------------------------------------------------------- tokens */
:root{
  --ink:#0d0d0e;
  --ink-deep:#08080a;
  --surface:#16171b;
  --surface-hi:#1c1d22;
  --rule:#26272d;
  --rule-hi:#34363e;
  --paper:#f5f5f5;
  --paper-2:#a9adb6;
  --signal:#4ce0a5;
  --signal-dim:rgba(76,224,165,.16);

  --sans:Geist,'Helvetica Neue',Helvetica,Arial,sans-serif;
  --mono:'Geist Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --wrap:1160px;
  --nav-h:64px;
  --ease:cubic-bezier(.4,0,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.5;
  letter-spacing:-.006em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;-webkit-tap-highlight-color:transparent}
h1,h2,h3{margin:0;line-height:1.06;letter-spacing:-.032em;font-weight:600}
section[id]{scroll-margin-top:calc(var(--nav-h) + 12px)}

:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:8px}

.skip{position:absolute;left:-9999px;top:8px;z-index:99;padding:10px 18px;border-radius:999px;
  background:var(--signal);color:var(--ink);font-weight:600}
.skip:focus{left:16px}

.mono{font-family:var(--mono);font-weight:500}

/* ------------------------------------------------------------------ field */
#field{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
body::after{
  content:"";position:fixed;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(760px 460px at 78% 4%,rgba(76,224,165,.09),transparent 70%),
    linear-gradient(180deg,rgba(13,13,14,0) 0%,rgba(13,13,14,.8) 56%,var(--ink) 88%);
}
main,.nav,.foot,.skip{position:relative;z-index:2}

/* -------------------------------------------------------------------- nav */
.nav{
  position:sticky;top:0;z-index:20;min-height:var(--nav-h);
  display:flex;align-items:center;gap:26px;
  padding:12px max(22px,calc((100vw - var(--wrap))/2));
  background:rgba(13,13,14,.78);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--rule);
}
.nav__mark{
  display:inline-flex;align-items:center;min-height:38px;
  font-family:var(--mono);font-size:14px;font-weight:500;letter-spacing:.02em;
  padding:5px 10px;border:1px solid var(--rule-hi);border-radius:7px;color:var(--paper);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav__links{display:flex;gap:24px;margin-right:auto;flex-wrap:wrap}
.nav__links a{
  position:relative;
  font-size:14px;color:var(--paper-2);padding:6px 0;
  transition:color .18s var(--ease);
}
.nav__links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--signal);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .22s var(--ease);
}
.nav__links a.is-active{color:var(--paper)}
.nav__links a.is-active::after{transform:scaleX(1)}

/* ---------------------------------------------------------------- buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:10px;
  font-size:14.5px;font-weight:600;letter-spacing:-.01em;
  color:var(--ink);background:var(--signal);
  border:1px solid var(--signal);
  transition:background .18s var(--ease),border-color .18s var(--ease),
             color .18s var(--ease),transform .12s var(--ease);
}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--rule-hi)}
.btn--small{padding:8px 15px;font-size:13.5px;border-radius:8px;min-height:38px}
.btn--big{padding:15px 30px;font-size:16px}
.btn:active{transform:translateY(1px)}
.btn svg{width:16px;height:16px;flex:0 0 auto}
.btn--big svg{width:18px;height:18px}

/* the destination of a link, shown instead of leaving it to the status bar */
.btn[data-link]{position:relative}
.btn[data-link]::after,.btn[data-link]::before{
  opacity:0;pointer-events:none;z-index:30;
  transition:opacity .18s var(--ease),transform .18s var(--ease);
}
.btn[data-link]::after{
  content:attr(data-link);
  position:absolute;top:calc(100% + 10px);left:50%;
  transform:translate(-50%,4px);
  padding:6px 11px;border:1px solid var(--rule-hi);border-radius:8px;
  background:var(--surface-hi);color:var(--paper-2);
  font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:0;
  white-space:nowrap;
}
.btn[data-link]::before{
  content:"";position:absolute;top:calc(100% + 6px);left:50%;width:7px;height:7px;
  transform:translate(-50%,4px) rotate(45deg);
  background:var(--surface-hi);
  border-left:1px solid var(--rule-hi);border-top:1px solid var(--rule-hi);
}
.btn[data-link]:focus-visible::after{opacity:1;transform:translate(-50%,0)}
.btn[data-link]:focus-visible::before{opacity:1;transform:translate(-50%,0) rotate(45deg)}
/* the header button sits at the right edge, so its tooltip hangs from that edge */
.nav .btn[data-link]::after{left:auto;right:0;transform:translate(0,4px)}
.nav .btn[data-link]::before{left:auto;right:16px;transform:translate(0,4px) rotate(45deg)}
.nav .btn[data-link]:focus-visible::after{transform:translate(0,0)}
.nav .btn[data-link]:focus-visible::before{transform:translate(0,0) rotate(45deg)}

/* ------------------------------------------------------------------- hero */
.hero{
  max-width:var(--wrap);margin:0 auto;
  padding:clamp(48px,7vw,96px) 22px clamp(30px,4vw,54px);
  display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,.8fr);
  gap:clamp(28px,5vw,64px);align-items:center;
}
.eyebrow{
  margin:0 0 20px;font-family:var(--mono);font-size:12px;font-weight:500;
  letter-spacing:.1em;text-transform:uppercase;color:var(--signal);
}
.hero h1{
  font-size:clamp(40px,6.4vw,78px);font-weight:700;letter-spacing:-.042em;
  margin-bottom:22px;
}
.lede{margin:0 0 14px;font-size:clamp(17px,1.8vw,19.5px);line-height:1.42;max-width:52ch}
.sub{margin:0;color:var(--paper-2);font-size:15.5px;line-height:1.5;max-width:52ch}
.hero__actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}

.hero__portrait{display:flex;justify-content:center}
.portrait{
  position:relative;width:min(310px,70vw);aspect-ratio:1;
  border:1px solid var(--rule-hi);border-radius:16px;overflow:hidden;
  background:var(--surface);
  transition:border-color .3s var(--ease),box-shadow .35s var(--ease);
}
.portrait img{
  width:100%;height:100%;border:0;border-radius:0;object-fit:cover;
  filter:saturate(.92) contrast(1.02);
  transition:transform .65s cubic-bezier(.2,.7,.2,1),filter .5s var(--ease);
}

/* ----------------------------------------------------------------- ribbon */
.ribbon{
  display:grid;gap:10px;
  padding:14px 0 6px;
  border-top:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
  margin:clamp(8px,2vw,26px) 0 0;
}
.ribbon__row{
  display:flex;overflow:hidden;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);
}
.ribbon__track{
  display:flex;flex:0 0 auto;gap:10px;margin:0;padding:0 5px;list-style:none;
  animation:marquee 46s linear infinite;
}
.ribbon__row--rev .ribbon__track{animation-name:marquee-reverse}
.ribbon__track li{
  flex:0 0 auto;
  font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.02em;
  color:var(--paper-2);
  padding:6px 13px;border:1px solid var(--rule);border-radius:7px;
  white-space:nowrap;
}
.ribbon__row--rev .ribbon__track li{color:var(--paper-2);border-color:var(--rule)}
.ribbon:hover .ribbon__track{animation-play-state:paused}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-100%)}}
@keyframes marquee-reverse{from{transform:translateX(-100%)}to{transform:translateX(0)}}

/* ------------------------------------------------------------ hero enters */
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.hero__text>*,.hero__portrait{animation:rise .7s cubic-bezier(.4,0,.2,1) both}
.hero__text>*:nth-child(1){animation-delay:.05s}
.hero__text>*:nth-child(2){animation-delay:.12s}
.hero__text>*:nth-child(3){animation-delay:.19s}
.hero__text>*:nth-child(4){animation-delay:.26s}
.hero__text>*:nth-child(5){animation-delay:.33s}
.hero__portrait{animation-delay:.18s}

/* --------------------------------------------------------------- sections */
.section{max-width:var(--wrap);margin:0 auto;padding:clamp(44px,5vw,72px) 22px}
.section__title{
  position:relative;
  display:flex;align-items:baseline;gap:16px;
  padding-bottom:16px;margin-bottom:32px;border-bottom:1px solid var(--rule);
  font-size:clamp(24px,3vw,34px);font-weight:600;letter-spacing:-.032em;
}
/* the green rule under a heading draws itself when the section arrives */
.section__title::after{
  content:"";position:absolute;left:0;bottom:-1px;width:100%;height:1px;
  background:linear-gradient(90deg,var(--signal),rgba(76,224,165,0) 62%);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .8s var(--ease) .08s;
}
.reveal.is-in .section__title::after{transform:scaleX(1)}
.minor{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.11em;text-transform:uppercase;
  color:var(--signal);margin-bottom:20px;font-weight:500;
}
.minor--spaced{margin-top:46px}
.section__note{margin:-16px 0 26px;color:var(--paper-2);font-size:15px;max-width:70ch}

.grid{display:grid;gap:14px}
.grid--cards{grid-template-columns:repeat(auto-fit,minmax(min(100%,380px),1fr))}
.grid--projects{grid-template-columns:repeat(auto-fit,minmax(min(100%,290px),1fr))}
.grid--ip{grid-template-columns:repeat(auto-fit,minmax(min(100%,400px),1fr))}
.grid--two{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:clamp(28px,4vw,56px)}
.stack{display:grid;gap:14px}
.stack--tight{gap:10px}

/* ------------------------------------------------------------------ cards */
.card,.proj,.paper,.ip,.talk{
  position:relative;isolation:isolate;
  background:var(--surface);
  border:1px solid var(--rule);
  border-radius:14px;
  padding:22px;
  transition:border-color .25s var(--ease),background .25s var(--ease),
             transform .25s var(--ease),box-shadow .25s var(--ease);
}
.card>*,.proj>*,.paper>*,.ip>*,.talk>*{position:relative;z-index:1}
.card h3,.proj h3{font-size:17.5px;font-weight:600;margin-bottom:9px;letter-spacing:-.02em}
.card p,.proj p{margin:0;color:var(--paper-2);font-size:15px;line-height:1.48}

.proj__year,.ip__kind,.talk__when{
  font-family:var(--mono);font-size:11.5px;font-weight:500;letter-spacing:.07em;
  text-transform:uppercase;color:var(--paper-2);
}
.proj__year{display:block;margin-bottom:9px}
.proj--lead{
  grid-column:1/-1;padding:28px;
  background:linear-gradient(180deg,rgba(76,224,165,.05),rgba(76,224,165,0) 55%),var(--surface);
  border-color:var(--rule-hi);
}
.proj--lead h3{font-size:clamp(20px,2.4vw,26px);margin-bottom:12px}
.proj--lead p{font-size:16px;max-width:80ch}
.proj--lead .proj__year{color:var(--signal)}

.tags{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0 0 !important}
.tags span{
  font-family:var(--mono);font-size:11.5px;font-weight:500;
  padding:4px 9px;border:1px solid var(--rule-hi);border-radius:6px;
  color:var(--paper-2);white-space:nowrap;
}

/* ----------------------------------------------------------- publications */
.paper{padding:26px}
.paper__venue{
  margin:0 0 12px;font-family:var(--mono);font-size:11.5px;font-weight:500;
  letter-spacing:.07em;text-transform:uppercase;color:var(--signal);
}
.paper h3{font-size:clamp(18px,2vw,22px);margin-bottom:13px;max-width:62ch;font-weight:600}
.paper__authors{margin:0 0 14px;font-size:14.5px;color:var(--paper-2)}
.paper__authors b{color:var(--paper);font-weight:600}
.paper p{color:var(--paper-2);font-size:15px;line-height:1.48;max-width:76ch}
.paper__ru{
  margin:12px 0 0 !important;padding-left:12px;
  border-left:1px solid var(--rule-hi);
  font-size:13.5px !important;color:var(--paper-2) !important;
}
.paper__links{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
.paper__links .btn,.paper__links .pill{overflow-wrap:anywhere;max-width:100%}
.pill{
  display:inline-flex;align-items:center;padding:8px 15px;
  border:1px solid var(--rule-hi);border-radius:8px;
  font-family:var(--mono);font-size:12px;color:var(--paper-2);
}

/* ---------------------------------------------------------------- patents */
.ip__kind{display:inline-block;margin-bottom:10px;color:var(--signal)}
.ip h3{font-family:var(--mono);font-size:19px;font-weight:500;letter-spacing:0;margin-bottom:8px}
.ip--lead{
  grid-column:1/-1;
  background:linear-gradient(180deg,rgba(76,224,165,.05),rgba(76,224,165,0) 55%),var(--surface);
  border-color:var(--rule-hi);
}
.ip--lead h3{font-size:clamp(20px,2.3vw,24px)}
.ip__title{margin:0 0 11px !important;color:var(--paper) !important;font-size:15.5px !important;
  font-weight:600;max-width:74ch;line-height:1.35}
.ip p{margin:0;color:var(--paper-2);font-size:15px;line-height:1.48;max-width:80ch}

/* ------------------------------------------------------------------ talks */
.talk{display:grid;grid-template-columns:180px minmax(0,1fr);gap:16px;padding:18px 22px}
.talk__when{padding-top:2px}
.talk h3{font-size:16.5px;font-weight:600;margin-bottom:5px;letter-spacing:-.02em}
.talk p{margin:0;color:var(--paper-2);font-size:14.5px;line-height:1.45}
.talk a{color:var(--signal);overflow-wrap:anywhere}
@media (max-width:760px){
  .talk{grid-template-columns:1fr;gap:6px}
  .talk__when{padding-top:0}
}

/* --------------------------------------------------------------- timeline */
.timeline{list-style:none;margin:0;padding:0}
.timeline li{position:relative;padding:0 0 26px 22px;border-left:1px solid var(--rule)}
.timeline li:last-child{padding-bottom:0;border-left-color:transparent}
.timeline li::before{
  content:"";position:absolute;left:-3.5px;top:9px;width:6px;height:6px;
  border-radius:50%;background:var(--signal);
  transition:box-shadow .25s var(--ease);
}
.timeline .when{
  display:block;font-family:var(--mono);font-size:11.5px;font-weight:500;
  letter-spacing:.07em;color:var(--paper-2);margin-bottom:4px;
}
.timeline b{display:block;font-size:16px;font-weight:600;margin-bottom:4px;letter-spacing:-.02em}
.timeline span:not(.when){display:block;color:var(--paper-2);font-size:14.5px;line-height:1.45}

.chips{display:flex;flex-wrap:wrap;gap:7px;margin:0}
.chips span{
  font-family:var(--mono);font-size:12px;padding:6px 12px;
  border:1px solid var(--rule);border-radius:7px;color:var(--paper-2);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}

.ilink{
  color:var(--signal);border-bottom:1px solid rgba(76,224,165,.32);
  background-image:linear-gradient(var(--signal),var(--signal));
  background-repeat:no-repeat;background-position:0 100%;background-size:0 1px;
  transition:background-size .3s var(--ease),border-color .2s var(--ease);
}

/* ------------------------------------------------------- closing + footer */
.closing{text-align:center;padding-bottom:clamp(56px,7vw,100px)}
.closing h2{font-size:clamp(26px,3.6vw,42px);font-weight:700;letter-spacing:-.038em;margin-bottom:12px}
.closing p{color:var(--paper-2);margin:0;font-size:16px}
.closing__actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:24px}
.foot{
  max-width:var(--wrap);margin:0 auto;padding:22px 22px 38px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  border-top:1px solid var(--rule);
  font-family:var(--mono);font-size:12.5px;color:var(--paper-2);
}
.foot__alt{margin-left:9px;opacity:.75}
.foot__links{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.foot__links a{display:inline-flex;align-items:center;gap:6px;min-height:32px}
@media (max-width:520px){
  .foot{gap:6px}
  .foot__links{gap:10px}
  .foot__links a{min-height:36px;padding:2px 0}
}
.foot__links svg{width:14px;height:14px;flex:0 0 auto}

/* ------------------------------------------------------------ hover layer */
@media (hover:hover) and (pointer:fine){
  .nav__mark:hover{border-color:var(--signal);color:var(--signal)}
  .nav__links a:hover{color:var(--paper)}
  .nav__links a:hover::after{transform:scaleX(1)}
  .ilink:hover{background-size:100% 1px;border-bottom-color:transparent}
  .btn:hover{background:#7bebc0;border-color:#7bebc0}
  .btn--ghost:hover{background:var(--surface-hi);border-color:var(--paper-2);color:var(--paper)}
  /* one hover language for every block: lift, green edge, accent picks up colour */
  .card:hover,.proj:hover,.ip:hover,.talk:hover,.paper:hover{
    border-color:rgba(76,224,165,.42);
    background:var(--surface-hi);
    transform:translateY(-3px);
    box-shadow:0 14px 34px rgba(0,0,0,.34);
  }
  .proj:hover .proj__year,.ip:hover .ip__kind,.talk:hover .talk__when{color:var(--signal)}
  .card:hover .tags span,.proj:hover .tags span{border-color:var(--rule-hi);color:var(--paper)}
  .paper:hover .paper__ru{border-left-color:var(--signal)}
  .timeline li:hover::before{box-shadow:0 0 0 4px var(--signal-dim)}
  .chips span:hover{border-color:var(--signal);color:var(--paper)}
  .foot a:hover{color:var(--signal)}
  .ilink:hover{border-bottom-color:var(--signal)}
  .btn:hover{box-shadow:0 8px 24px rgba(76,224,165,.18)}
  .btn--ghost:hover{box-shadow:0 8px 24px rgba(0,0,0,.35)}
  .btn[data-link]:hover::after{opacity:1;transform:translate(-50%,0)}
  .btn[data-link]:hover::before{opacity:1;transform:translate(-50%,0) rotate(45deg)}
  .nav .btn[data-link]:hover::after{transform:translate(0,0)}
  .nav .btn[data-link]:hover::before{transform:translate(0,0) rotate(45deg)}
  .portrait:hover{border-color:rgba(76,224,165,.5);box-shadow:0 22px 60px rgba(76,224,165,.14)}
  .portrait:hover img{transform:scale(1.06);filter:saturate(1) contrast(1.05)}

  /* the card lights up under the cursor, --mx/--my come from app.js */
  .card::after,.proj::after,.paper::after,.ip::after,.talk::after{
    content:"";position:absolute;inset:0;border-radius:inherit;z-index:0;
    pointer-events:none;opacity:0;
    background:radial-gradient(300px circle at var(--mx,50%) var(--my,0%),
      rgba(76,224,165,.13),transparent 70%);
    transition:opacity .3s var(--ease);
  }
  .card:hover::after,.proj:hover::after,.paper:hover::after,
  .ip:hover::after,.talk:hover::after{opacity:1}
}

/* ----------------------------------------------------------------- reveal */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
/* Cards rise one after another. The index comes from app.js as --i, so the
   cascade keeps running past the third card in long lists. */
/* :where() keeps these at one-class specificity so :hover on a card still wins */
:where(.reveal) .card,:where(.reveal) .proj,:where(.reveal) .talk,:where(.reveal) .ip,
:where(.reveal) .paper,:where(.reveal) .timeline li{
  opacity:0;transform:translateY(18px) scale(.985);filter:blur(4px);
  transition:opacity .5s var(--ease),transform .5s var(--ease),filter .5s var(--ease),
             border-color .2s var(--ease),background .2s var(--ease);
  transition-delay:calc(var(--i,0) * 55ms);
}
:where(.reveal.is-in) .card,:where(.reveal.is-in) .proj,:where(.reveal.is-in) .talk,
:where(.reveal.is-in) .ip,:where(.reveal.is-in) .paper,:where(.reveal.is-in) .timeline li{
  opacity:1;transform:none;filter:none;
}

/* ------------------------------------------------------------ breakpoints */
@media (max-width:1040px){
  .portrait{width:min(258px,30vw)}
}
@media (max-width:880px){
  :root{--nav-h:112px}
  .hero{grid-template-columns:1fr;padding-top:36px}
  .hero__portrait{order:-1;justify-content:flex-start}
  .portrait{width:min(212px,52vw)}
  /* the sections stay reachable on a phone: the links scroll instead of hiding */
  .nav{gap:10px 14px;flex-wrap:wrap;padding-bottom:0}
  .nav .btn{margin-left:auto}
  .nav__links{
    order:3;width:100%;margin:0;padding:0 0 6px;gap:18px;
    flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
    -webkit-mask-image:linear-gradient(90deg,#000 88%,transparent);
    mask-image:linear-gradient(90deg,#000 88%,transparent);
  }
  .nav__links::-webkit-scrollbar{display:none}
  .nav__links a{
    white-space:nowrap;display:inline-flex;align-items:center;min-height:40px;padding:0;
  }
}
/* the cascade stays on a phone, with a lighter blur so scrolling keeps up */
@media (max-width:600px){
  :where(.reveal:not(.is-in)) .card,:where(.reveal:not(.is-in)) .proj,
  :where(.reveal:not(.is-in)) .talk,:where(.reveal:not(.is-in)) .ip,
  :where(.reveal:not(.is-in)) .paper,:where(.reveal:not(.is-in)) .timeline li{
    transform:translateY(14px) scale(.99);filter:blur(2.5px);
  }
}
@media (max-width:480px){
  body{font-size:15.5px}
  .section{padding:38px 20px}
  .section__title{flex-wrap:wrap;gap:8px;padding-bottom:12px;margin-bottom:24px}
  .card,.proj,.ip,.paper{padding:18px}
  .proj--lead{padding:20px}
  .paper h3{font-size:19px}
  .hero{padding:28px 20px 26px}
  .ribbon__track li{font-size:11.5px;padding:5px 11px}
  .ribbon{gap:8px}
  .grid,.stack{gap:12px}
  .closing{padding-bottom:52px}
}

/* -------------------------------------------------------------- touch layer */
@media (hover:none){
  .btn--small{min-height:42px;padding:10px 16px}
  .paper__links .btn,.paper__links .pill{min-height:42px}
  .foot__links a{min-height:42px}
  .card:active,.proj:active,.ip:active,.talk:active,.paper:active{
    border-color:rgba(76,224,165,.42);
    background:var(--surface-hi);
    transform:translateY(-2px);
  }
  .proj:active .proj__year,.ip:active .ip__kind,.talk:active .talk__when{color:var(--signal)}
  .portrait:active{border-color:rgba(76,224,165,.5);box-shadow:0 18px 44px rgba(76,224,165,.14)}
  .portrait:active img{transform:scale(1.04)}
  .btn:active{box-shadow:0 8px 22px rgba(76,224,165,.18)}
  .btn--ghost:active{background:var(--surface-hi);border-color:var(--paper-2)}
}

/* the three hero buttons make a deliberate block instead of a ragged wrap */
@media (max-width:440px){
  .hero__actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .hero__actions .btn:first-child{grid-column:1/-1}
  .closing__actions{display:grid;grid-template-columns:1fr;gap:10px}
  .btn--big{padding:14px 18px;font-size:15px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
  .reveal,.reveal .card,.reveal .proj,.reveal .talk,.reveal .ip,
  .reveal .paper,.reveal .timeline li{opacity:1;transform:none;filter:none}
  .section__title::after{transform:scaleX(1)}
}