@font-face{font-family:"Sora";src:url("../fonts/sora-latin-600-normal.woff2") format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Sora";src:url("../fonts/sora-latin-700-normal.woff2") format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Figtree";src:url("../fonts/figtree-latin-400-normal.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Figtree";src:url("../fonts/figtree-latin-400-italic.woff2") format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:"Figtree";src:url("../fonts/figtree-latin-500-normal.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Figtree";src:url("../fonts/figtree-latin-600-normal.woff2") format("woff2");font-weight:600;font-display:swap}

:root{
  --bg:#F4F6F5; --paper:#FFFFFF; --ink:#0A0B0D; --mute:#56606A; --line:#DCE1DF;
  --green:#2EE59D; --green-deep:#0B7A52; --dark:#0A0B0D; --dark2:#12161B; --dark-line:#242B32;
  --r:18px; --maxw:1240px; --gut:clamp(20px,4vw,48px);
  --display:"Sora",ui-sans-serif,system-ui,sans-serif; --text:"Figtree",ui-sans-serif,system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 18px/1.7 var(--text);overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit}
:focus-visible{outline:3px solid var(--green);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
h1,h2,h3{font-family:var(--display);font-weight:700;line-height:1.08;letter-spacing:-.025em;margin:0}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}

/* ---------- header ---------- */
.hdr{position:fixed;inset:0 0 auto 0;z-index:50;transition:background .3s,box-shadow .3s,backdrop-filter .3s}
.hdr .in{display:flex;align-items:center;justify-content:space-between;height:72px;max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}
.brand{display:block;line-height:0}
.logo{height:26px;width:auto}
.l-dark{display:none}
.hdr.solid{background:rgba(244,246,245,.88);backdrop-filter:saturate(1.4) blur(14px);box-shadow:0 1px 0 var(--line)}
.hdr.solid .l-light{display:none}.hdr.solid .l-dark{display:block}
.nav{display:flex;gap:6px}
.nav a{font:500 15px/1 var(--text);text-decoration:none;padding:12px 14px;border-radius:99px;color:#fff;transition:background .2s,color .2s}
.hdr.solid .nav a{color:var(--ink)}
.nav a:hover{background:rgba(46,229,157,.18)}
.nav a[aria-current="page"]{background:var(--green);color:var(--ink)}
.burger{display:none;background:none;border:0;width:44px;height:44px;border-radius:12px;cursor:pointer;color:#fff}
.hdr.solid .burger{color:var(--ink)}
.burger span{display:block;width:22px;height:2px;background:currentColor;margin:5px auto;transition:transform .25s,opacity .2s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.progress{position:absolute;left:0;bottom:0;height:3px;width:100%;transform-origin:0 50%;transform:scaleX(0);background:var(--green)}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100svh;display:grid;align-items:end;background:var(--dark);color:#fff;overflow:hidden;isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:112%;object-fit:cover;object-position:60% 50%;will-change:transform;transform:translate3d(0,var(--py,0),0) scale(1.04);animation:kb 28s ease-in-out infinite alternate}
@keyframes kb{to{transform:translate3d(0,var(--py,0),0) scale(1.14)}}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(10,11,13,.92) 0%,rgba(10,11,13,.55) 48%,rgba(10,11,13,.1) 100%),linear-gradient(0deg,rgba(10,11,13,.85),transparent 45%)}
.hero .glow{position:absolute;z-index:-1;width:60vmax;height:60vmax;left:var(--gx,70%);top:var(--gy,30%);translate:-50% -50%;border-radius:50%;background:radial-gradient(circle,rgba(46,229,157,.2),transparent 62%);filter:blur(30px);pointer-events:none;transition:left .6s ease-out,top .6s ease-out}
.hero-in{padding:140px var(--gut) clamp(48px,9vh,96px);max-width:var(--maxw);margin:0 auto;width:100%}
.hero h1{font-size:clamp(2.7rem,8.2vw,7.2rem);max-width:12ch;letter-spacing:-.04em;line-height:.98}
.hero p.lead{font-size:clamp(1.05rem,1.6vw,1.3rem);max-width:46ch;color:#D5DBDF;margin:26px 0 34px}
.btn{display:inline-flex;align-items:center;gap:10px;min-height:48px;padding:0 26px;border-radius:99px;background:var(--green);color:var(--ink);font:600 16px/1 var(--text);text-decoration:none;border:0;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 30px -8px rgba(46,229,157,.6)}
.btn.ghost{background:transparent;color:inherit;border:1.5px solid currentColor}
.hero .seq{opacity:0;transform:translateY(22px);animation:up .9s cubic-bezier(.2,.7,.2,1) forwards}
.hero .seq:nth-child(1){animation-delay:.1s}.hero .seq:nth-child(2){animation-delay:.28s}.hero .seq:nth-child(3){animation-delay:.46s}
@keyframes up{to{opacity:1;transform:none}}
.scrollcue{position:absolute;right:var(--gut);bottom:40px;display:flex;flex-direction:column;align-items:center;gap:10px;font:500 13px/1 var(--text);color:#c8d0d5;writing-mode:vertical-rl}
.scrollcue i{display:block;width:2px;height:56px;background:linear-gradient(var(--green),transparent);animation:cue 2s ease-in-out infinite;transform-origin:top}
@keyframes cue{0%{transform:scaleY(0)}60%{transform:scaleY(1)}100%{transform:scaleY(1);opacity:0}}

/* ---------- ticker ---------- */
.ticker{background:var(--green);color:var(--ink);overflow:hidden;white-space:nowrap;font:600 15px/1 var(--text)}
.ticker div{display:inline-flex;gap:0;padding:18px 0;animation:tick 42s linear infinite}
.ticker:hover div{animation-play-state:paused}
.ticker span{padding:0 28px;position:relative}
.ticker span::after{content:"";position:absolute;right:-4px;top:50%;width:8px;height:8px;margin-top:-4px;background:var(--ink);border-radius:2px 8px 8px 8px}
@keyframes tick{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
section{padding:clamp(72px,10vw,140px) 0}
.sec-h{max-width:760px;margin-bottom:clamp(36px,5vw,64px)}
.sec-h h2{font-size:clamp(2rem,4.6vw,3.6rem)}
.sec-h p{color:var(--mute);margin:18px 0 0;max-width:56ch}
.kick{display:inline-block;font:600 14px/1 var(--text);color:var(--green-deep);margin-bottom:16px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}
.card{position:relative;display:flex;flex-direction:column;justify-content:flex-end;min-height:440px;border-radius:var(--r);overflow:hidden;color:#fff;text-decoration:none;background:var(--dark);isolation:isolate;transform:perspective(900px) rotateX(var(--rx,0)) rotateY(var(--ry,0));transition:transform .25s ease-out,box-shadow .3s}
.card:hover{box-shadow:0 30px 60px -28px rgba(10,11,13,.6)}
.card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;transition:transform .8s cubic-bezier(.2,.7,.2,1)}
.card:hover img{transform:scale(1.07)}
.card::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(0deg,rgba(10,11,13,.9),rgba(10,11,13,.1) 65%)}
.card::after{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),rgba(46,229,157,.22),transparent 60%);opacity:0;transition:opacity .3s}
.card:hover::after{opacity:1}
.card .t{padding:28px 28px 30px;position:relative;z-index:1}
.card h3{font-size:clamp(1.4rem,2.4vw,2.1rem)}
.card .meta{display:flex;gap:12px;font:500 14px/1 var(--text);color:#cfd6da;margin-bottom:14px}
.card .tag{background:var(--green);color:var(--ink);padding:6px 11px;border-radius:99px;font-weight:600}
.card p{margin:12px 0 0;color:#d5dbdf;font-size:16px;line-height:1.55;max-width:44ch}
.c1{grid-column:span 7;min-height:560px}.c2{grid-column:span 5}.c3{grid-column:span 12;min-height:380px}

/* explorer */
.explorer{background:var(--dark);color:#fff;border-radius:28px;overflow:hidden;display:grid;grid-template-columns:1.05fr 1fr}
.ex-stage{position:relative;min-height:560px;background:var(--dark2)}
.ex-stage img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .7s ease}
.ex-stage img.on{opacity:1}
.ex-stage::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 55%,var(--dark));pointer-events:none}
.ex-badge{position:absolute;left:24px;bottom:24px;z-index:2;background:rgba(10,11,13,.7);backdrop-filter:blur(8px);padding:12px 16px;border-radius:14px;font:600 14px/1.3 var(--text)}
.ex-body{padding:clamp(28px,4vw,56px)}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:34px}
.tab{min-height:44px;padding:0 18px;border-radius:99px;background:transparent;color:#fff;border:1.5px solid var(--dark-line);font:600 15px/1 var(--text);cursor:pointer;transition:all .25s}
.tab:hover{border-color:var(--green)}
.tab[aria-selected="true"]{background:var(--green);color:var(--ink);border-color:var(--green)}
.ex-body h3{font-size:clamp(1.7rem,3vw,2.5rem);margin-bottom:6px}
.ex-sub{color:#aeb7bd;margin:0 0 28px;font-size:16px;line-height:1.55}
.bar{margin:0 0 22px}
.bar .lab{display:flex;justify-content:space-between;font:500 15px/1.3 var(--text);color:#d5dbdf;margin-bottom:8px}
.bar .lab b{font:700 17px/1 var(--display);color:#fff}
.bar .trk{height:10px;background:#1b2229;border-radius:99px;overflow:hidden}
.bar .fill{height:100%;width:var(--w,0%);background:linear-gradient(90deg,#93F8CF,#2EE59D);border-radius:99px;transition:width 1s cubic-bezier(.2,.7,.2,1)}
.bar small{display:block;color:#8a949b;font-size:13px;margin-top:6px}
.facts{list-style:none;padding:0;margin:26px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:10px 18px}
.facts li{font-size:15px;line-height:1.45;color:#d5dbdf;padding-left:22px;position:relative}
.facts li::before{content:"";position:absolute;left:0;top:.5em;width:10px;height:10px;border-radius:2px 8px 8px 8px;background:var(--green)}
.facts li.no{color:#7d878e}.facts li.no::before{background:#39424a}
.src{font-size:13px;color:#8a949b;margin-top:26px;line-height:1.5}
.src a{color:#aeb7bd}

/* dark feature band */
.band{background:var(--dark);color:#fff}
.band .sec-h p{color:#aeb7bd}
.band .kick{color:var(--green)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,72px);align-items:center}
.photo{border-radius:var(--r);overflow:hidden;aspect-ratio:4/5;background:var(--dark2);position:relative}
.photo img{width:100%;height:100%;object-fit:cover}
.credit{position:absolute;left:12px;bottom:12px;font:500 12px/1 var(--text);background:rgba(10,11,13,.65);color:#e5e9eb;padding:6px 9px;border-radius:99px;backdrop-filter:blur(6px);text-decoration:none}
.credit:hover{background:rgba(10,11,13,.9)}
.thermo{background:var(--dark2);border:1px solid var(--dark-line);border-radius:var(--r);padding:30px}
.thermo .val{font:700 clamp(3rem,7vw,5rem)/1 var(--display);letter-spacing:-.04em}
.thermo .val sup{font-size:.4em;color:#8a949b;margin-left:4px}
.thermo .zone{margin:6px 0 22px;font:600 17px/1.4 var(--text);min-height:3.2em}
input[type=range]{width:100%;height:44px;background:none;-webkit-appearance:none;appearance:none}
input[type=range]::-webkit-slider-runnable-track{height:10px;border-radius:99px;background:linear-gradient(90deg,#4aa8ff 0%,#4aa8ff 33%,#2EE59D 36%,#2EE59D 49%,#f0c24b 52%,#f0c24b 77%,#ff6b57 80%,#ff6b57 100%)}
input[type=range]::-moz-range-track{height:10px;border-radius:99px;background:linear-gradient(90deg,#4aa8ff 0%,#4aa8ff 33%,#2EE59D 36%,#2EE59D 49%,#f0c24b 52%,#f0c24b 77%,#ff6b57 80%,#ff6b57 100%)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:28px;height:28px;border-radius:50%;background:#fff;border:4px solid var(--ink);margin-top:-9px;box-shadow:0 0 0 3px var(--green);cursor:grab}
input[type=range]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:#fff;border:4px solid var(--ink);box-shadow:0 0 0 3px var(--green);cursor:grab}
.scale{display:flex;justify-content:space-between;font-size:13px;color:#8a949b}

/* ---------- article ---------- */
.a-hero{position:relative;min-height:78svh;display:grid;align-items:end;background:var(--dark);color:#fff;isolation:isolate;overflow:hidden}
.a-hero .hero-bg img{object-position:50% 50%;animation:none;height:115%}
.a-hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(0deg,rgba(10,11,13,.92),rgba(10,11,13,.25) 70%)}
.a-hero .in{padding:140px var(--gut) clamp(40px,7vh,72px);max-width:var(--maxw);margin:0 auto;width:100%}
.a-hero h1{font-size:clamp(2.2rem,6vw,5rem);max-width:18ch;letter-spacing:-.035em}
.a-hero .meta{display:flex;flex-wrap:wrap;gap:12px;align-items:center;font:500 15px/1 var(--text);color:#d5dbdf;margin-bottom:22px}
.a-hero .tag{background:var(--green);color:var(--ink);padding:7px 12px;border-radius:99px;font-weight:600}
.a-hero .credit{left:auto;right:max(var(--gut),calc((100vw - var(--maxw))/2 + var(--gut)));bottom:18px}
.hero>.credit{left:max(var(--gut),calc((100vw - var(--maxw))/2 + var(--gut)))!important}
.a-wrap{display:grid;grid-template-columns:220px minmax(0,720px);gap:clamp(32px,6vw,96px);max-width:var(--maxw);margin:0 auto;padding:clamp(48px,7vw,96px) var(--gut)}
.toc{position:sticky;top:96px;align-self:start;font-size:15px;line-height:1.4}
.toc b{display:block;font:600 14px/1 var(--text);color:var(--mute);margin-bottom:14px}
.toc a{display:block;padding:9px 0 9px 16px;border-left:2px solid var(--line);text-decoration:none;color:var(--mute);transition:all .2s}
.toc a:hover{color:var(--ink)}
.toc a.on{color:var(--ink);border-color:var(--green);font-weight:600}
.prose{min-width:0}
.prose>*{margin:0 0 1.25em}
.prose h2{font-size:clamp(1.6rem,3vw,2.3rem);margin:2.1em 0 .6em;scroll-margin-top:96px}
.prose h3{font-size:1.3rem;margin:1.6em 0 .5em}
.prose .lede{font-size:1.28rem;line-height:1.6;color:#2b3238}
.prose ul,.prose ol{padding-left:1.2em}.prose li{margin:.4em 0}
.prose a{color:var(--green-deep);text-underline-offset:3px}
.prose a.credit{color:#e5e9eb;text-decoration:none}
.prose strong{font-weight:600}
.callout{border-radius:var(--r);padding:22px 24px;background:var(--paper);border:1px solid var(--line);border-left:5px solid var(--green);font-size:16.5px;line-height:1.6}
.callout b{display:block;font:700 16px/1.2 var(--display);margin-bottom:6px}
.callout.warn{border-left-color:#e0a21d;background:#FFFBF1}
.fig{margin:2.2em calc(-1*clamp(0px,4vw,60px))}
.fig .photo{aspect-ratio:16/9}
.fig figcaption{font-size:13px;color:var(--mute);margin-top:10px;line-height:1.4}
.fig figcaption a{color:inherit}
table.cmp{width:100%;border-collapse:collapse;font-size:15.5px;line-height:1.45;background:var(--paper);border-radius:var(--r);overflow:hidden;box-shadow:0 0 0 1px var(--line)}
table.cmp th,table.cmp td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.cmp thead th{background:var(--dark);color:#fff;font:600 14.5px/1.3 var(--text)}
table.cmp tbody th{font-weight:600;background:#F9FAF9;width:28%}
table.cmp tr:last-child td,table.cmp tr:last-child th{border-bottom:0}
.tscroll{overflow-x:auto;margin:1.6em 0;border-radius:var(--r)}
.tscroll table{min-width:560px}
.src-list{font-size:15px;line-height:1.55;color:var(--mute);border-top:1px solid var(--line);padding-top:22px;margin-top:3em}
.src-list h3{font-size:1rem;color:var(--ink);margin:0 0 10px}
.src-list ul{padding-left:1.1em;margin:0}
.next{background:var(--dark);color:#fff}
.next .cards{margin-top:0}
.next .card{min-height:340px}.next .c{grid-column:span 6}

/* checklist & ring */
.check{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:clamp(22px,3vw,34px)}
.check-top{display:flex;gap:22px;align-items:center;margin-bottom:22px}
.ring{width:96px;height:96px;flex:none;position:relative}
.ring svg{transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:9}
.ring .bg{stroke:#E6EAE8}.ring .fg{stroke:var(--green);stroke-linecap:round;transition:stroke-dashoffset .6s cubic-bezier(.2,.7,.2,1),stroke .3s}
.ring b{position:absolute;inset:0;display:grid;place-items:center;font:700 22px/1 var(--display)}
.check-top h3{margin:0 0 4px;font-size:1.25rem}.check-top p{margin:0;color:var(--mute);font-size:15.5px;line-height:1.5}
.check label{display:flex;gap:14px;align-items:flex-start;padding:14px 4px;border-top:1px solid var(--line);cursor:pointer;font-size:16.5px;line-height:1.5}
.check input{appearance:none;-webkit-appearance:none;flex:none;width:26px;height:26px;border-radius:8px;border:2px solid #B9C2BE;margin-top:1px;cursor:pointer;display:grid;place-items:center;transition:all .2s}
.check input:checked{background:var(--green);border-color:var(--green)}
.check input:checked::after{content:"";width:6px;height:12px;border:solid var(--ink);border-width:0 2.5px 2.5px 0;transform:rotate(45deg) translate(-1px,-1px)}

/* quiz */
.quiz{background:var(--dark);color:#fff;border-radius:24px;padding:clamp(24px,4vw,44px)}
.quiz .q{display:none}.quiz .q.on{display:block;animation:up .5s both}
.quiz h3{font-size:clamp(1.3rem,2.6vw,1.8rem);margin:0 0 20px}
.opts{display:grid;gap:10px}
.opt{text-align:left;min-height:56px;padding:14px 18px;border-radius:14px;background:var(--dark2);border:1.5px solid var(--dark-line);color:#fff;font:500 16.5px/1.4 var(--text);cursor:pointer;transition:all .2s}
.opt:hover{border-color:var(--green);transform:translateX(4px)}
.qstep{font:600 14px/1 var(--text);color:var(--green);margin-bottom:14px}
.result{display:none}.result.on{display:block;animation:up .6s both}
.result h3{font-size:clamp(1.6rem,3.4vw,2.4rem)}
.result ul{padding-left:1.1em;color:#d5dbdf}
.result .btn{margin-top:10px}

/* eartips */
.tips{display:flex;align-items:flex-end;gap:clamp(10px,3vw,28px);margin:1.6em 0;padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);overflow-x:auto}
.tips div{display:grid;justify-items:center;gap:10px;font:600 14px/1 var(--text);color:var(--mute)}
.tips i{display:block;border-radius:50% 50% 46% 46%;background:radial-gradient(circle at 35% 30%,#fff,#d9dfdc 70%);box-shadow:inset 0 -6px 10px rgba(0,0,0,.08),0 6px 14px -8px rgba(0,0,0,.4);transition:transform .3s}
.tips div:hover i{transform:translateY(-6px)}

/* limit widget */
.limit{background:var(--dark2);border:1px solid var(--dark-line);border-radius:var(--r);padding:30px}
.limit .big{font:700 clamp(3rem,7vw,5rem)/1 var(--display);letter-spacing:-.04em}
.limit .battery{height:46px;border-radius:12px;border:3px solid #fff;padding:4px;position:relative;margin:18px 0 8px;max-width:360px}
.limit .battery::after{content:"";position:absolute;right:-12px;top:11px;width:7px;height:16px;background:#fff;border-radius:0 4px 4px 0}
.limit .lvl{height:100%;width:var(--lv,100%);border-radius:6px;background:linear-gradient(90deg,#93F8CF,#2EE59D);transition:width .35s}
.limit p{color:#c3cbd0;font-size:16px;line-height:1.55;margin:14px 0 0}
.limit input[type=range]::-webkit-slider-runnable-track{background:#2a323a}
.limit input[type=range]::-moz-range-track{background:#2a323a}

/* footer */
footer{background:var(--dark);color:#aeb7bd;padding:64px 0 40px;font-size:15px;line-height:1.6}
footer .top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:32px;padding-bottom:36px;border-bottom:1px solid var(--dark-line)}
footer .logo{height:30px}
footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
footer a{text-decoration:none}footer a:hover{color:#fff;text-decoration:underline}
footer .credits{padding-top:28px;font-size:13px;line-height:1.7;max-width:900px}
footer .credits a{text-decoration:underline}

/* reveal (used sparingly) */
.rv{opacity:0;transform:translateY(24px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}

@media (max-width:900px){
  .nav{position:fixed;inset:72px 0 auto 0;flex-direction:column;background:var(--bg);padding:12px var(--gut) 22px;gap:0;transform:translateY(-130%);transition:transform .35s cubic-bezier(.2,.7,.2,1);box-shadow:0 20px 40px -20px rgba(0,0,0,.35)}
  .nav.open{transform:none}
  .nav a{color:var(--ink)!important;font-size:18px;padding:16px 8px;border-bottom:1px solid var(--line);border-radius:0}
  .burger{display:block}
  .cards{grid-template-columns:1fr}
  .c1,.c2,.c3{grid-column:auto;min-height:420px}
  .explorer{grid-template-columns:1fr}
  .ex-stage{min-height:340px}.ex-stage::after{background:linear-gradient(0deg,var(--dark),transparent 50%)}
  .split{grid-template-columns:1fr}
  .a-wrap{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
  .fig{margin-left:0;margin-right:0}
  .scrollcue{display:none}
  .next .c{grid-column:auto}
}
@media (max-width:520px){
  body{font-size:17px}
  .facts{grid-template-columns:1fr}
  .check-top{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .rv{opacity:1;transform:none}.hero .seq{opacity:1;transform:none}
}