:root{
  --ink:#0a0f1a;--panel:#0f1624;--panel2:#141d2e;--line:#1f2b40;
  --text:#eceff4;--muted:#98a4ba;--dim:#6c7a94;
  --signal:#ffb020;--test:#5b9dff;
  --serif:ui-serif,"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --gutter:clamp(20px,5vw,64px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ink);color:var(--text);font:400 1.0625rem/1.65 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:4px}
.wrap{max-width:1200px;margin:0 auto;padding:0 var(--gutter)}
h1,h2{font-family:var(--serif);font-weight:500;letter-spacing:-.03em;margin:0}
h3{margin:0;font-size:1.1rem;font-weight:650}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(10,15,26,.86);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:20px;height:70px}
.brand{font-family:var(--serif);font-size:1.5rem;font-weight:700;letter-spacing:-.02em}
.brand span{font-weight:400;color:var(--muted)}
.brand i{font-style:normal;color:var(--signal)}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:8px 14px;border-radius:999px;color:var(--muted);font-size:.95rem;transition:color .2s,background .2s}
.nav a:hover{color:var(--text)}
.nav a[aria-current=page]{color:var(--text);background:var(--panel2)}
.right{display:flex;align-items:center;gap:10px}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;padding:3px}
.lang button{font:600 .78rem var(--sans);letter-spacing:.06em;padding:5px 11px;border:0;border-radius:999px;background:none;color:var(--muted);cursor:pointer}
.lang button.active{background:var(--text);color:var(--ink)}
.menu-btn{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;background:none;color:var(--text);cursor:pointer;place-items:center}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 26px;border-radius:999px;font-weight:650;font-size:.97rem;border:1px solid var(--line);color:var(--text);background:transparent;transition:background .2s,border-color .2s}
.btn:hover{border-color:#3a4a66;background:var(--panel2)}
.btn.primary{background:var(--signal);border-color:var(--signal);color:#1a1200}
.btn.primary:hover{background:#ffc04d;border-color:#ffc04d}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.ul{border-bottom:1px solid var(--signal);padding-bottom:1px;color:var(--text)}

/* hero */
.hero{position:relative;padding:clamp(56px,9vw,120px) 0 clamp(64px,8vw,110px);overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(var(--line) 1px,transparent 1px) 0 0/72px 72px,linear-gradient(90deg,var(--line) 1px,transparent 1px) 0 0/72px 72px;opacity:.4;-webkit-mask-image:radial-gradient(70% 80% at 72% 30%,#000,transparent);mask-image:radial-gradient(70% 80% at 72% 30%,#000,transparent)}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(32px,6vw,80px);align-items:center}
.hero h1{font-size:clamp(3.2rem,8vw,6.6rem);line-height:.96}
.lead{color:var(--muted);font-size:clamp(1.05rem,1.6vw,1.28rem);max-width:60ch;margin:26px 0 0}

/* experiment card: the one memorable element */
.lab{margin:0;background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:0 30px 90px rgba(0,0,0,.5)}
.lab-top{display:flex;align-items:center;gap:10px;font-weight:650;font-size:.95rem}
.lab-top .dot{width:9px;height:9px;border-radius:50%;background:var(--signal)}
.lab-top [data-i18n=labTitle]{white-space:nowrap}
.lab-top .tag{margin-left:auto;font-weight:500;font-size:.78rem;color:var(--dim);text-align:right}
.lab-h{margin:20px 0 24px;color:var(--muted);font-size:.98rem}
.lab-row{display:grid;grid-template-columns:92px 1fr 78px;align-items:center;gap:14px;margin-bottom:14px;font-size:.92rem;color:var(--muted)}
.track{height:14px;background:var(--panel2);border-radius:999px;overflow:hidden}
.track i{display:block;height:100%;width:var(--w);border-radius:999px;background:var(--test);transform-origin:left;animation:fill 1.3s cubic-bezier(.2,.7,.2,1) .35s both}
.lab-row.win{color:var(--text)}
.lab-row.win .track i{background:var(--signal);animation-delay:.7s}
.badge{justify-self:end;font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:999px;background:rgba(255,176,32,.14);color:var(--signal);animation:pop .5s ease 2s both}
.lab-foot{margin:22px 0 0;padding-top:18px;border-top:1px solid var(--line);color:var(--dim);font-size:.88rem}
@keyframes fill{from{transform:scaleX(0)}}
@keyframes pop{from{opacity:0}}

/* sections */
.sec{padding:clamp(64px,9vw,120px) 0;border-top:1px solid var(--line)}
.sec h2{font-size:clamp(2rem,4.2vw,3.4rem);line-height:1.06;max-width:22ch}
.sec-lead{color:var(--muted);max-width:58ch;margin:20px 0 0}
.frame{border:1px solid var(--line);border-radius:18px;background:var(--panel);overflow:hidden}
.frame img{width:100%}

.what{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(32px,6vw,90px);align-items:start}
.what .head{position:sticky;top:110px}
.rows{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.rows li{display:grid;grid-template-columns:44px 1fr;gap:4px 20px;padding:26px 0;border-bottom:1px solid var(--line)}
.rows .ico{grid-row:span 2}
.rows p{margin:0;color:var(--muted);max-width:52ch}
.rows.plain li{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:24px}
.ico{width:44px;height:44px;border-radius:12px;background:var(--panel2);display:grid;place-items:center}
.ico svg{width:22px;height:22px;fill:none;stroke:var(--signal);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

.loop{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(32px,6vw,90px);align-items:center}
.steps{list-style:none;margin:32px 0 0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 36px}
.steps li{padding:20px 0;border-top:1px solid var(--line)}
.steps .n{display:block;font:600 .85rem var(--sans);color:var(--signal);font-variant-numeric:tabular-nums;margin-bottom:6px}
.steps p{margin:6px 0 0;color:var(--muted);font-size:.96rem}
.page-body .steps{margin-top:0}

.tiles{list-style:none;margin:44px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.tile{border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--panel)}
.tile img{width:100%;aspect-ratio:5/3;object-fit:cover}
.tile div{padding:18px 20px 22px}
.tile p{margin:4px 0 0;color:var(--muted);font-size:.93rem}

.notice{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center}
.notice h2{font-size:clamp(1.7rem,3vw,2.4rem)}
.notice p{color:var(--muted);max-width:62ch;margin:14px 0 0}

.about{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,6vw,80px);align-items:center}
.prose p{color:var(--muted);max-width:62ch;margin:0 0 18px}

.faq{max-width:820px;margin-top:40px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px;padding:22px 0;font-weight:600;font-size:1.05rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";color:var(--signal);font-size:1.5rem;line-height:1;font-weight:400}
.faq details[open] summary:after{content:"\2212"}
.faq p{margin:0 0 22px;color:var(--muted);max-width:60ch}

.closing{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:end}
.closing h2{font-size:clamp(2.2rem,5vw,4rem);max-width:16ch}

/* inner pages */
.page-head{padding:clamp(56px,8vw,100px) 0 clamp(32px,4vw,56px)}
.page-head h1{font-size:clamp(2.6rem,6.4vw,5rem);line-height:1;max-width:16ch}
.page-body{padding-bottom:clamp(64px,9vw,120px)}
h2.sm{font-size:clamp(1.6rem,3vw,2.3rem);margin:72px 0 28px}
.product-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.product-row{display:grid;grid-template-columns:150px 1fr auto;gap:22px;align-items:center;padding:20px 0;border-bottom:1px solid var(--line)}
.product-row img{width:150px;border-radius:12px;aspect-ratio:5/3;object-fit:cover}
.product-row p{margin:2px 0 0;color:var(--muted)}
.row-title{font-family:var(--sans);font-size:1.2rem;font-weight:650;letter-spacing:0}
.disc{margin:32px 0 0;color:var(--dim);font-size:.9rem}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:56px 0 40px;color:var(--muted);font-size:.93rem}
.foot{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:32px}
.foot h4{margin:0 0 12px;color:var(--text);font-size:.9rem}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.foot a:hover{color:var(--text)}
.foot-tag{margin:8px 0 0}
.copy{margin:40px 0 0;padding-top:22px;border-top:1px solid var(--line);color:var(--dim);font-size:.85rem}

/* responsive */
@media(max-width:980px){
  .hero-grid,.what,.loop,.about,.notice,.closing{grid-template-columns:1fr}
  .what .head{position:static}
  .tiles{grid-template-columns:repeat(2,minmax(0,1fr))}
  .rows.plain li{grid-template-columns:1fr;gap:6px}
}
@media(max-width:860px){
  .nav{display:none}
  .right{margin-left:auto}
  .menu-btn{display:grid}
  .menu-open .nav{display:flex;flex-direction:column;gap:2px;position:absolute;top:70px;left:0;right:0;margin:0;padding:12px var(--gutter) 22px;background:var(--ink);border-bottom:1px solid var(--line)}
  .menu-open .nav a{padding:12px 14px;font-size:1.05rem}
}
@media(max-width:600px){
  .steps,.tiles{grid-template-columns:1fr}
  .product-row{grid-template-columns:1fr}
  .product-row img{width:100%}
  .foot{grid-template-columns:1fr 1fr}
  .foot>div:first-child{grid-column:1/-1}
  .lab-row{grid-template-columns:78px 1fr 70px}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}