:root{
  --bg:#F2F3F5; --surface:#FFFFFF; --ink:#16181D; --muted:#666C78; --line:#D9DCE1; --accent:#3446A8;
  --serif:'Instrument Serif',Georgia,serif; --sans:'DM Sans',system-ui,sans-serif;
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#13151A; --surface:#1B1E25; --ink:#ECEEF2; --muted:#9AA1AE; --line:#2B2F38; --accent:#8F9FFF;
  color-scheme:dark;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{background:var(--bg);color:var(--ink);font:400 1.0625rem/1.65 var(--sans);transition:background .4s,color .4s;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
h2{font:400 clamp(2rem,4vw,3rem)/1.1 var(--serif);margin-bottom:2.5rem}
h3{font-weight:600;font-size:1.0625rem}

/* nav */
.nav{position:fixed;inset:0 0 auto 0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:1rem clamp(1.25rem,4vw,3rem);transition:background .3s,box-shadow .3s,backdrop-filter .3s}
.nav.scrolled{background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line)}
.logo{font:400 1.6rem var(--serif)}
#menu{display:flex;gap:2rem}
#menu a{position:relative;color:var(--muted);font-size:.95rem;padding:.25rem 0;transition:color .2s}
#menu a::after{content:"";position:absolute;left:0;bottom:-2px;height:1px;width:100%;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .3s}
#menu a:hover,#menu a.on{color:var(--ink)}
#menu a:hover::after,#menu a.on::after{transform:scaleX(1)}
.nav-tools{display:flex;gap:.5rem;align-items:center}
.icon-btn{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;transition:background .2s}
.icon-btn:hover{background:var(--line)}
#theme svg{width:20px;height:20px;stroke:var(--ink);fill:none;stroke-width:1.6}
.burger{display:none;position:relative}
.burger span{position:absolute;width:20px;height:1.5px;background:var(--ink);transition:transform .3s}
.burger span:first-child{transform:translateY(-4px)}.burger span:last-child{transform:translateY(4px)}
.burger[aria-expanded="true"] span:first-child{transform:rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{transform:rotate(-45deg)}

/* hero */
.hero{min-height:100svh;display:grid;place-items:center;padding:6rem 1.5rem 4rem;position:relative;overflow:hidden}
.frame{position:relative;padding:clamp(2.5rem,6vw,5rem) clamp(2rem,7vw,6rem);transition:padding .6s cubic-bezier(.2,.8,.2,1)}
.hero.focus .frame{padding:clamp(2rem,5vw,4rem) clamp(1.5rem,6vw,5rem)}
.c{position:absolute;width:28px;height:28px;border:solid var(--ink);border-width:0;opacity:.75;transition:opacity .4s}
.hero.focus .c{opacity:1}
.tl{top:0;left:0;border-width:1.5px 0 0 1.5px}.tr{top:0;right:0;border-width:1.5px 1.5px 0 0}
.bl{bottom:0;left:0;border-width:0 0 1.5px 1.5px}.br{bottom:0;right:0;border-width:0 1.5px 1.5px 0}
.rec{position:absolute;top:.9rem;left:1.1rem;font-size:.8rem;color:var(--muted);font-variant-numeric:tabular-nums;display:flex;gap:.5rem;align-items:center}
.dot{width:8px;height:8px;border-radius:50%;background:#E5484D;animation:blink 1.4s steps(2,jump-none) infinite}
@keyframes blink{50%{opacity:.15}}
.name{font:400 clamp(3.2rem,11vw,8.5rem)/.95 var(--serif);letter-spacing:-.02em}
.line{display:block;overflow:hidden;padding-bottom:.08em}
.w{display:inline-block;transform:translateY(105%);animation:up 1.1s cubic-bezier(.2,.8,.2,1) forwards}
.line:nth-child(2) .w{animation-delay:.12s;font-style:italic;color:var(--muted)}
.line:nth-child(3) .w{animation-delay:.24s}
@keyframes up{to{transform:none}}
.role{margin-top:1.75rem;color:var(--muted);min-height:1.7em;opacity:0;animation:fade .8s 1s forwards}
.caret{display:inline-block;width:1px;height:1.1em;background:var(--ink);margin-left:2px;vertical-align:-.15em;animation:blink 1s steps(2,jump-none) infinite}
@keyframes fade{to{opacity:1}}
.hint{position:absolute;bottom:1.75rem;font-size:.85rem;color:var(--muted);opacity:0;animation:fade 1s 1.6s forwards}
.crosshair{position:absolute;left:0;top:0;width:44px;height:44px;margin:-22px 0 0 -22px;pointer-events:none;opacity:0;transition:opacity .3s;z-index:2}
.crosshair::before,.crosshair::after{content:"";position:absolute;background:var(--accent)}
.crosshair::before{left:50%;top:0;width:1px;height:100%}.crosshair::after{top:50%;left:0;height:1px;width:100%}
.hero.focus .crosshair{opacity:.7}

/* sections */
.sec{max-width:1040px;margin:0 auto;padding:clamp(4.5rem,10vw,8rem) clamp(1.25rem,4vw,3rem)}
.about{display:grid;grid-template-columns:1.1fr 1fr;gap:1.25rem 4rem;align-items:start}
.lead{font:400 clamp(1.5rem,2.6vw,2rem)/1.3 var(--serif);grid-row:span 2}
.about p:not(.lead){color:var(--muted);max-width:60ch}
.facts{grid-column:2;display:grid;gap:.9rem;margin-top:1rem}
.facts div{display:flex;justify-content:space-between;gap:1rem;padding-top:.9rem;border-top:1px solid var(--line)}
.facts dt{color:var(--muted)}.facts dd{text-align:right;font-weight:500}

/* tabs */
.tabs{display:inline-flex;gap:.25rem;padding:.3rem;background:var(--surface);border-radius:999px;margin-bottom:2.5rem;position:relative;box-shadow:inset 0 0 0 1px var(--line)}
.tab{padding:.5rem 1.25rem;border-radius:999px;color:var(--muted);transition:color .3s,background .3s}
.tab.on{background:var(--ink);color:var(--bg)}
.panel{display:none}.panel.on{display:block;animation:fade .5s}
.timeline{list-style:none;position:relative;padding-left:2rem}
.timeline::before{content:"";position:absolute;left:5px;top:.6rem;bottom:.6rem;width:1px;background:var(--line)}
.timeline li{position:relative;padding-bottom:2.5rem}
.timeline li::before{content:"";position:absolute;left:-2rem;top:.55rem;width:11px;height:11px;border-radius:50%;background:var(--bg);border:1.5px solid var(--ink);transition:background .3s}
.timeline li:hover::before{background:var(--accent);border-color:var(--accent)}
.timeline time{font-size:.9rem;color:var(--muted)}
.timeline h3{font:400 1.75rem/1.2 var(--serif);margin:.15rem 0}
.timeline p{color:var(--muted)}
.item{border-top:1px solid var(--line)}.item:last-child{border-bottom:1px solid var(--line)}
.item summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;padding:1.5rem 0;font:400 clamp(1.4rem,2.5vw,1.75rem) var(--serif);transition:padding-left .3s}
.item summary::-webkit-details-marker{display:none}
.item summary:hover{padding-left:.5rem}
.plus{position:relative;width:16px;height:16px;flex:none}
.plus::before,.plus::after{content:"";position:absolute;background:var(--ink);transition:transform .35s}
.plus::before{left:0;top:7.25px;width:16px;height:1.5px}.plus::after{left:7.25px;top:0;width:1.5px;height:16px}
.item[open] .plus::after{transform:scaleY(0)}
.item .body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .4s}
.item[open] .body{grid-template-rows:1fr}
.item .body>p{overflow:hidden;color:var(--muted);max-width:62ch;padding-bottom:0}
.item[open] .body>p{padding-bottom:1.75rem}
.item b{color:var(--ink);font-weight:500}

/* skills */
.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:3rem}
.cols h3{margin-bottom:1.1rem;color:var(--muted);font-weight:500}
.chips{list-style:none;display:flex;flex-wrap:wrap;gap:.5rem}
.chips li{padding:.45rem 1rem;border-radius:999px;background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);font-size:.95rem;transition:transform .25s,background .25s,color .25s,box-shadow .25s;cursor:default}
.chips li:hover{background:var(--ink);color:var(--bg);transform:translateY(-3px)}
.strengths{list-style:none;display:grid;gap:1.1rem}
.strengths li{display:grid;gap:.1rem;padding-left:1rem;border-left:1px solid var(--line);transition:border-color .3s}
.strengths li:hover{border-color:var(--accent)}
.strengths b{font:400 1.4rem var(--serif)}
.strengths span{color:var(--muted);font-size:.95rem}

/* contact */
.contact{text-align:center}
.mail{display:inline-block;font:400 clamp(1.4rem,4.6vw,3.4rem)/1.2 var(--serif);overflow-wrap:anywhere;background:linear-gradient(var(--ink),var(--ink)) 0 100%/0 1px no-repeat;transition:background-size .5s}
.mail:hover{background-size:100% 1px}
.cta{display:flex;gap:.75rem;justify-content:center;margin:2.5rem 0 1.5rem;flex-wrap:wrap}
.btn{padding:.8rem 1.6rem;border-radius:999px;background:var(--ink);color:var(--bg);font-weight:500;transition:transform .25s,opacity .25s}
.btn.ghost{background:none;color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.btn:hover{transform:translateY(-2px);opacity:.88}
.small{color:var(--muted);font-size:.95rem}
.foot{text-align:center;padding:2rem 1rem 3rem;color:var(--muted);font-size:.85rem;border-top:1px solid var(--line);max-width:1040px;margin:0 auto}
.toast{position:fixed;left:50%;bottom:1.5rem;transform:translate(-50%,2rem);background:var(--ink);color:var(--bg);padding:.7rem 1.2rem;border-radius:999px;font-size:.9rem;opacity:0;pointer-events:none;transition:.35s;z-index:30}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .8s,transform .8s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}

@media(max-width:820px){
  .burger{display:grid}
  #menu{position:fixed;inset:0 0 auto 0;top:0;flex-direction:column;gap:0;padding:5rem 1.5rem 1.5rem;background:var(--bg);box-shadow:0 1px 0 var(--line);transform:translateY(-100%);transition:transform .4s;z-index:-1}
  #menu.open{transform:none}
  #menu a{padding:.9rem 0;font-size:1.25rem;border-bottom:1px solid var(--line)}
  .about,.cols{grid-template-columns:1fr}
  .facts{grid-column:1}.lead{grid-row:auto}
  .cols{gap:2.5rem}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-delay:0s!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}.w{transform:none}.reveal{opacity:1;transform:none}
}

/* ===== multi-page additions ===== */
body{animation:pagein .6s ease both}
@keyframes pagein{from{opacity:0}to{opacity:1}}
.page-head{max-width:1040px;margin:0 auto;padding:clamp(8rem,16vw,11rem) clamp(1.25rem,4vw,3rem) 0}
.page-head h1{font:400 clamp(2.8rem,8vw,6rem)/1 var(--serif);letter-spacing:-.02em}
.page-head p{margin-top:1.25rem;color:var(--muted);max-width:52ch}
.sec.flush{padding-top:clamp(2.5rem,5vw,4rem)}
.cta.left{justify-content:flex-start;margin-bottom:0}
.cols h3.gap{margin-top:2rem}
.facts.center{max-width:420px;margin:2.5rem auto 0;text-align:left}
#menu a.on::after{transform:scaleX(1)}

/* portfolio */
.filters{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2rem}
.filters:empty{display:none}
.filter{padding:.45rem 1.1rem;border-radius:999px;box-shadow:inset 0 0 0 1px var(--line);color:var(--muted);font-size:.95rem;transition:all .25s}
.filter:hover{color:var(--ink)}
.filter.on{background:var(--ink);color:var(--bg);box-shadow:none}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:1.5rem}
.card{display:flex;flex-direction:column;background:var(--surface);border-radius:14px;overflow:hidden;box-shadow:inset 0 0 0 1px var(--line);transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s;animation:cardin .6s both}
@keyframes cardin{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.card:hover{transform:translateY(-6px);box-shadow:inset 0 0 0 1px var(--ink)}
.thumb{aspect-ratio:4/3;background:var(--line);overflow:hidden;display:grid;place-items:center;font:400 3rem var(--serif);color:var(--muted)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.card:hover .thumb img{transform:scale(1.05)}
.card .info{padding:1.25rem 1.4rem 1.5rem;display:grid;gap:.5rem}
.card .tag{font-size:.85rem;color:var(--accent)}
.card h3{font:400 1.5rem/1.2 var(--serif)}
.card p{color:var(--muted);font-size:.95rem}
.card .go{margin-top:.5rem;font-weight:500;font-size:.95rem;justify-self:start;background:linear-gradient(currentColor,currentColor) 0 100%/0 1px no-repeat;transition:background-size .35s}
.card .go:hover{background-size:100% 1px}
.card.slot{background:none;box-shadow:none;border:1.5px dashed var(--line);min-height:300px;align-items:center;justify-content:center;text-align:center;padding:2rem;gap:.5rem;color:var(--muted)}
.card.slot:hover{transform:none;border-color:var(--muted)}
.card.slot b{font:400 1.5rem var(--serif);color:var(--ink)}
.card.slot .plus-big{font:300 2.5rem/1 var(--sans);margin-bottom:.5rem}
.note{margin-top:2rem;color:var(--muted);font-size:.95rem;max-width:60ch}
.note code{background:var(--surface);padding:.1rem .45rem;border-radius:6px;box-shadow:inset 0 0 0 1px var(--line);font-size:.9em}

/* language switch */
.lang{display:flex;align-items:center;gap:.3rem;height:36px;padding:0 .85rem;border-radius:999px;font-size:.82rem;font-weight:600;box-shadow:inset 0 0 0 1px var(--line);transition:box-shadow .25s}
.lang:hover{box-shadow:inset 0 0 0 1px var(--ink)}
.lang span{color:var(--muted);transition:color .25s}
.lang span.on{color:var(--ink)}
.lang i{font-style:normal;color:var(--line)}