/* Mkista — shared design system */
:root{
  --bg:#121219; --surface:#1e1e29; --surface-2:#2a2a38; --line:#3f3f52; --line-2:#56566b;
  --text:#f4f3f0; --muted:#a8a8b6; --dim:#9898aa;
  --accent:#6690ff; --accent-rgb:102,144,255; --btn:#3a66e0; --accent-2:#8b5cf6;
  --green:#3fbf8f; --amber:#f59e4b;
  --font:"Inter",system-ui,-apple-system,sans-serif;
  --font-head:"Archivo",system-ui,sans-serif;
  --wrap:1240px; --r:20px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--muted);font-family:var(--font);font-size:16px;
     line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-head);color:var(--text);margin:0;line-height:1.02;
            font-weight:900;letter-spacing:-.03em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 clamp(1.15rem,4vw,2.6rem)}
.kick{display:inline-flex;align-items:center;gap:8px;font-size:11px;font-weight:700;
      letter-spacing:.2em;text-transform:uppercase;color:var(--accent)}
.kick::before{content:"";width:22px;height:1.5px;background:var(--accent)}
.lede{font-size:clamp(1rem,1.35vw,1.1rem);max-width:620px;margin:20px 0 0}
.big{font-size:clamp(2.1rem,4.6vw,3.5rem)}
.mid{font-size:clamp(1.8rem,3.4vw,2.6rem)}

/* grain */
body::after{content:"";position:fixed;inset:0;z-index:999;pointer-events:none;opacity:.03;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E")}
.prog{position:fixed;top:0;left:0;height:2px;width:100%;transform:scaleX(0);transform-origin:0 50%;
      background:linear-gradient(90deg,var(--accent),#bed0ff);z-index:200}

/* reveal (only once JS confirms it runs) */
.js .rv{opacity:0;transform:translateY(24px);
        transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1)}
.js .rv.in{opacity:1;transform:none}

/* nav — glass */
.nav{position:sticky;top:0;z-index:120;background:rgba(18,18,25,.6);backdrop-filter:blur(18px) saturate(1.4);
     border-bottom:1px solid transparent;transition:background .3s,border-color .3s}
.nav.stuck{background:rgba(18,18,25,.95);border-bottom-color:var(--line)}
.nav__in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px;
         max-width:var(--wrap);margin:0 auto;padding:0 clamp(1.15rem,4vw,2.6rem)}
.logo{font-family:var(--font-head);font-size:22px;font-weight:900;color:var(--text);letter-spacing:-.03em}
.logo span{color:var(--accent)}
.nav__links{display:flex;align-items:center;gap:24px}
.nav__links a{position:relative;font-size:14px;font-weight:600;color:var(--muted)}
.nav__links a:not(.btn)::after{content:"";position:absolute;left:0;bottom:-6px;height:1.5px;width:100%;
  background:var(--accent);transform:scaleX(0);transform-origin:100% 50%;
  transition:transform .32s cubic-bezier(.22,1,.36,1)}
.nav__links a:not(.btn):hover{color:var(--text)}
.nav__links a:not(.btn):hover::after,.nav__links a.on::after{transform:scaleX(1);transform-origin:0 50%}
.nav__links a.on{color:var(--text)}
/* .nav__links a (0,1,1) out-specifies .btn--gold (0,1,0) — restore button colours */
.nav__links a.btn--gold{color:#fff}
.nav__links a.btn--line{color:var(--text)}

/* buttons */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;
     border-radius:999px;font-size:14.5px;font-weight:700;padding:13px 26px;white-space:nowrap;
     border:0;cursor:pointer;overflow:hidden;
     transition:transform .25s cubic-bezier(.22,1,.36,1),background .25s,border-color .25s,box-shadow .25s}
.btn:hover{transform:translateY(-2px)}
.btn--gold{background:var(--btn);color:#fff;box-shadow:0 10px 30px -12px rgba(var(--accent-rgb),.8)}
.btn--gold:hover{background:#4b76ea;box-shadow:0 16px 38px -12px rgba(var(--accent-rgb),.95)}
.btn--gold::before{content:"";position:absolute;top:0;left:-130%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.5),transparent);transform:skewX(-20deg)}
.btn--gold:hover::before{animation:shine .85s ease}
@keyframes shine{to{left:150%}}
.btn--line{background:transparent;color:var(--text);border:1.5px solid var(--line-2)}
.btn--line:hover{border-color:var(--accent);color:var(--accent)}

/* hero */
.hero{position:relative;padding:clamp(76px,10vw,132px) 0 clamp(56px,7vw,88px);overflow:hidden;isolation:isolate}
.hero__bg{position:absolute;inset:-6% 0 0;z-index:-3;background:var(--bg)}
.hero__bg img{width:100%;height:112%;object-fit:cover;opacity:.2;filter:saturate(.7) contrast(1.05);
              will-change:transform}
.hero::before{content:"";position:absolute;inset:0;z-index:-2;pointer-events:none;background:
  radial-gradient(900px 480px at 8% -12%,rgba(var(--accent-rgb),.2),transparent 62%),
  radial-gradient(820px 520px at 94% 0%,rgba(139,92,246,.26),transparent 60%);
  animation:drift 24s ease-in-out infinite alternate}
@keyframes drift{to{transform:translate3d(-2.5%,1.5%,0) scale(1.06)}}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(180deg,rgba(18,18,25,.22) 0%,rgba(18,18,25,.66) 62%,var(--bg) 100%)}
.hero>.wrap{position:relative;z-index:2}
.hero h1{font-size:clamp(2.55rem,7.4vw,5.4rem);margin:18px 0 0}
.gl{background:linear-gradient(100deg,#6690ff 0%,#bed0ff 42%,#6690ff 72%);background-size:220% 100%;
    -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
    animation:sweep 7s linear infinite}
@keyframes sweep{to{background-position:220% 0}}
.hero .lede{font-size:clamp(1.02rem,1.5vw,1.18rem);max-width:660px;color:#c6c6d4}
.gu{display:block;margin:12px 0 0;font-size:15px;color:var(--accent);font-weight:600}
.ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px;align-items:center}
.ph{color:var(--muted);font-size:14.5px}
.ph b{color:var(--text)}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:28px}
.chips span{font-size:12.2px;font-weight:600;color:var(--muted);background:rgba(42,42,56,.75);
            border:1px solid var(--line);border-radius:999px;padding:7px 15px;backdrop-filter:blur(6px)}
.chips span::before{content:"✓ ";color:var(--accent)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
       border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-top:46px}
.stats div{background:rgba(30,30,41,.9);padding:22px 16px;text-align:center;backdrop-filter:blur(8px)}
.stats b{display:block;font-family:var(--font-head);font-size:1.9rem;color:var(--text);
         font-weight:900;font-variant-numeric:tabular-nums}
.stats span{font-size:11px;letter-spacing:.14em;color:var(--muted)}

/* marquee */
.mq{border-block:1px solid var(--line);background:var(--surface);overflow:hidden;
    -webkit-mask-image:linear-gradient(90deg,transparent,#000 9%,#000 91%,transparent);
    mask-image:linear-gradient(90deg,transparent,#000 9%,#000 91%,transparent)}
.mq__t{display:flex;width:max-content;animation:roll 44s linear infinite}
.mq:hover .mq__t{animation-play-state:paused}
@keyframes roll{to{transform:translateX(-50%)}}
.mq__t span{display:inline-flex;padding:15px 0}
.mq__t i{font-style:normal;padding:0 24px;white-space:nowrap;font-family:var(--font-head);
         font-size:14px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:#8d8da2}
.mq__t i b{color:var(--accent)}

/* sections */
.sec{padding:clamp(66px,8.5vw,120px) 0;position:relative}
.sec--alt{background:var(--surface)}
.sec--alt2{background:var(--surface-2)}
.head{max-width:760px}
.head--c{margin:0 auto;text-align:center}
.head h2{margin:14px 0 0}
.head p{margin:18px 0 0;max-width:700px}
.head--c p{margin-left:auto;margin-right:auto}

/* BENTO */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-top:48px}
.bt{position:relative;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r);
    padding:30px 28px 32px;overflow:hidden;isolation:isolate;display:flex;flex-direction:column;
    transition:transform .32s cubic-bezier(.22,1,.36,1),border-color .32s}
.sec--alt2 .bt{background:var(--surface)}
.bt::before{content:"";position:absolute;inset:0;z-index:-1;opacity:0;transition:opacity .35s;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),
             rgba(var(--accent-rgb),.14),transparent 44%)}
.bt:hover{transform:translateY(-6px);border-color:rgba(var(--accent-rgb),.5)}
.bt:hover::before{opacity:1}
.bt--lg{grid-column:span 4}
.bt--md{grid-column:span 2}
.bt--sm{grid-column:span 2}
.bt__n{font-family:var(--font-head);font-size:12px;font-weight:800;letter-spacing:.16em;color:var(--dim)}
.bt h3{font-size:clamp(1.4rem,2.2vw,1.9rem);margin:14px 0 0}
.bt--sm h3{font-size:1.25rem}
.bt p{font-size:14.2px;margin:12px 0 0;line-height:1.62}
.bt ul{list-style:none;padding:0;margin:20px 0 0;display:flex;flex-wrap:wrap;gap:7px}
.bt li{font-size:11.6px;font-weight:600;color:var(--muted);background:rgba(255,255,255,.04);
       border:1px solid var(--line);border-radius:999px;padding:4px 11px}
.bt__go{margin-top:auto;padding-top:22px;font-size:13.4px;font-weight:700;color:var(--accent);
        display:inline-flex;align-items:center;gap:7px}
.bt__go span{transition:transform .3s cubic-bezier(.22,1,.36,1)}
.bt:hover .bt__go span{transform:translateX(5px)}
.bt__ico{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
         background:rgba(var(--accent-rgb),.1);margin-bottom:4px;
         transition:transform .35s cubic-bezier(.22,1,.36,1)}
.bt:hover .bt__ico{transform:scale(1.1) rotate(-6deg)}
.bt__ico svg{width:22px;height:22px;fill:none;stroke:var(--accent);stroke-width:1.8;
             stroke-linecap:round;stroke-linejoin:round}
.bt--g .bt__ico{background:rgba(63,191,143,.1)} .bt--g .bt__ico svg{stroke:var(--green)}
.bt--g .bt__go{color:var(--green)}
.bt--t .bt__ico{background:rgba(232,146,58,.1)} .bt--t .bt__ico svg{stroke:var(--amber)}
.bt--t .bt__go{color:var(--amber)}

/* WORK */
.work{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:48px}
.wk{display:block;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
    background:var(--surface-2);transition:transform .35s cubic-bezier(.22,1,.36,1),border-color .35s}
.sec--alt .wk{background:var(--surface-2)}
.wk:hover{transform:translateY(-7px);border-color:rgba(var(--accent-rgb),.55)}
.wk__i{position:relative;aspect-ratio:25/18;overflow:hidden;background:var(--surface)}
.wk__i img{width:100%;height:100%;object-fit:cover;object-position:top center;
           transition:transform .7s cubic-bezier(.22,1,.36,1)}
.wk:hover .wk__i img{transform:scale(1.045)}
.wk__i::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 52%,rgba(18,18,25,.78) 100%)}
.wk__m{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:19px 22px 21px}
.wk__m b{display:block;font-family:var(--font-head);font-size:16.5px;color:var(--text);font-weight:800}
.wk__m span{font-size:12.4px;color:var(--muted)}
.wk__a{flex:none;width:34px;height:34px;border-radius:50%;border:1px solid var(--line-2);
       display:grid;place-items:center;color:var(--muted);font-size:14px;
       transition:background .3s,color .3s,border-color .3s,transform .3s}
.wk:hover .wk__a{background:var(--btn);color:#fff;border-color:var(--accent);transform:rotate(45deg)}

/* PROCESS */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:48px}
.st{position:relative;padding:30px 24px 28px;border:1px solid var(--line);border-radius:var(--r);
    background:var(--surface-2);transition:border-color .3s,transform .3s cubic-bezier(.22,1,.36,1)}
.sec--alt2 .st{background:var(--surface)}
.st:hover{border-color:rgba(var(--accent-rgb),.45);transform:translateY(-5px)}
.st b{display:block;font-family:var(--font-head);font-size:2.8rem;font-weight:900;line-height:.85;
      color:transparent;-webkit-text-stroke:1.5px var(--line-2);margin-bottom:16px}
.st h4{font-size:17px;font-weight:800;margin-bottom:8px}
.st p{font-size:13.6px;margin:0;line-height:1.6}

/* SPLIT */
.split{display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(28px,5vw,64px);align-items:center}
.split--rev .split__t{order:2}
.split__img{position:relative;border-radius:22px;overflow:hidden;border:1px solid var(--line);
            aspect-ratio:4/3;background:var(--surface-2);box-shadow:0 44px 90px -44px rgba(0,0,0,.8)}
.split__img img{width:100%;height:118%;object-fit:cover;margin-top:-9%;will-change:transform}
.pl{display:flex;flex-wrap:wrap;gap:7px;margin:24px 0 0;padding:0;list-style:none}
.pl li{font-size:12.2px;font-weight:600;color:var(--text);background:var(--surface-2);
       border:1px solid var(--line);border-radius:999px;padding:6px 13px}
.sec--alt2 .pl li{background:var(--surface)}

/* CARDS (sub pages) */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:44px}
.cd{position:relative;background:var(--surface-2);border:1px solid var(--line);border-radius:18px;
    padding:26px 24px 28px;overflow:hidden;isolation:isolate;
    transition:transform .3s cubic-bezier(.22,1,.36,1),border-color .3s}
.sec--alt2 .cd{background:var(--surface)}
.cd::before{content:"";position:absolute;inset:0;z-index:-1;opacity:0;transition:opacity .35s;
  background:radial-gradient(340px circle at var(--mx,50%) var(--my,50%),
             rgba(var(--accent-rgb),.13),transparent 42%)}
.cd:hover{transform:translateY(-6px);border-color:rgba(var(--accent-rgb),.5)}
.cd:hover::before{opacity:1}
.cd__ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:15px;
         background:rgba(var(--accent-rgb),.1)}
.cd__ico svg{width:21px;height:21px;fill:none;stroke:var(--accent);stroke-width:1.8;
             stroke-linecap:round;stroke-linejoin:round}
.g .cd__ico{background:rgba(63,191,143,.1)} .g .cd__ico svg{stroke:var(--green)}
.t .cd__ico{background:rgba(232,146,58,.1)} .t .cd__ico svg{stroke:var(--amber)}
.cd h4{font-size:17.5px;margin-bottom:8px;font-weight:800}
.cd p{font-size:13.8px;line-height:1.6;margin:0}
.cd ul{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px;padding:0;list-style:none}
.cd li{font-size:11px;font-weight:600;color:var(--muted);background:rgba(255,255,255,.04);
       border:1px solid var(--line);border-radius:999px;padding:3px 10px}

/* PRICING */
.pk{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:46px}
.pk__c{position:relative;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r);
       padding:32px 25px;display:flex;flex-direction:column;
       transition:transform .3s cubic-bezier(.22,1,.36,1),border-color .3s}
.pk__c:hover{transform:translateY(-6px);border-color:rgba(var(--accent-rgb),.45)}
.pk__c--hero{background:linear-gradient(170deg,rgba(var(--accent-rgb),.17),var(--surface-2) 62%);
             border-color:rgba(var(--accent-rgb),.55)}
.pk__tag{position:absolute;top:-11px;left:22px;background:var(--btn);color:#fff;font-size:10.4px;
         font-weight:800;letter-spacing:.1em;text-transform:uppercase;padding:5px 13px;border-radius:999px}
.pk__c h4{font-size:18px;margin-bottom:5px;font-weight:800}
.pk__sub{font-size:12.6px;color:var(--muted);margin:0 0 18px}
.pk__pr{font-family:var(--font-head);font-size:1.22rem;font-weight:800;color:var(--accent)}
.pk__c ul{list-style:none;padding:0;margin:20px 0 24px;flex:1}
.pk__c li{position:relative;padding-left:21px;font-size:13.4px;line-height:1.5;margin-bottom:10px}
.pk__c li::before{content:"";position:absolute;left:0;top:8px;width:9px;height:9px;border-radius:50%;
                  background:var(--accent)}
.note{font-size:13px;margin-top:28px;text-align:center}

/* FAQ */
.faq{margin-top:42px}
.faq details{background:var(--surface-2);border:1px solid var(--line);border-radius:15px;
             padding:18px 22px;margin-bottom:10px;transition:border-color .25s}
.sec--alt2 .faq details{background:var(--surface)}
.faq details[open]{border-color:rgba(var(--accent-rgb),.42)}
.faq summary{font-family:var(--font-head);font-size:16.5px;color:var(--text);cursor:pointer;
             list-style:none;font-weight:800}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--accent);font-family:var(--font);
                    font-weight:700;transition:transform .3s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{margin:12px 0 2px;font-size:14.4px}

/* CTA + footer */
.cta{position:relative;overflow:hidden;
     background:linear-gradient(165deg,rgba(var(--accent-rgb),.15),var(--surface-2) 58%);
     border:1px solid rgba(var(--accent-rgb),.4);border-radius:26px;
     padding:clamp(40px,5.5vw,70px);text-align:center}
.cta::before{content:"";position:absolute;inset:-40%;pointer-events:none;
  background:radial-gradient(420px 320px at 50% 0%,rgba(var(--accent-rgb),.2),transparent 66%);
  animation:drift 18s ease-in-out infinite alternate}
.cta>*{position:relative}
.cta p{max-width:560px;margin:18px auto 0}
.cta__b{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:30px}
footer{background:var(--surface);border-top:1px solid var(--line);padding:56px 0 40px;font-size:13.8px}
.ft{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px}
.ft h5{font-family:var(--font-head);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
       color:var(--text);margin:0 0 14px;font-weight:800}
.ft ul{list-style:none;padding:0;margin:0}
.ft li{margin-bottom:9px}
.ft a{color:var(--muted);font-size:13.6px}
.ft a:hover{color:var(--accent)}
.ft p{margin:10px 0 0;font-size:13.4px}
.ft__b{margin-top:40px;padding-top:26px;border-top:1px solid var(--line);
       display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.4px;color:var(--dim)}
.seoline{margin-top:18px;font-size:11.8px;color:#8a8a9c;line-height:1.7}

/* floating */
.fab{position:fixed;right:20px;bottom:20px;z-index:130;width:56px;height:56px;border-radius:50%;
     background:#25D366;display:grid;place-items:center;box-shadow:0 14px 30px -10px rgba(0,0,0,.8)}
.fab::after{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid #25D366;
            animation:pulse 2.6s ease-out infinite}
@keyframes pulse{0%{transform:scale(1);opacity:.75}100%{transform:scale(1.7);opacity:0}}
.fab svg{width:28px;height:28px;fill:#fff;position:relative}
.abar{display:none}

@media(max-width:1000px){
  .bento{grid-template-columns:repeat(4,1fr)}
  .bt--lg,.bt--md{grid-column:span 4}
  .bt--sm{grid-column:span 2}
  .steps,.pk{grid-template-columns:repeat(2,1fr)}
  .ft{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
  .split{grid-template-columns:1fr;gap:26px}
  .split--rev .split__t{order:0}
  .grid3,.stats{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  .nav__links a:not(.btn){display:none}
  .fab{display:none}
  .work{grid-template-columns:1fr}
  .abar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:130;background:rgba(30,30,41,.97);
        backdrop-filter:blur(12px);border-top:1px solid var(--line);
        padding:10px 12px calc(10px + env(safe-area-inset-bottom));gap:10px}
  .abar a{flex:1;text-align:center;padding:13px;border-radius:999px;font-size:14.5px;font-weight:700}
  .abar .wa{background:var(--btn);color:#fff}
  .abar .call{background:var(--surface-2);border:1px solid var(--line);color:var(--text)}
  body{padding-bottom:78px}
}
@media(max-width:600px){
  .bento{grid-template-columns:1fr}
  .bt--lg,.bt--md,.bt--sm{grid-column:span 1}
  .grid3,.steps,.pk,.ft{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .js .rv{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ── QUOTE FORM (typeform-style, one question at a time) ──────────── */
.qf{position:relative;background:var(--surface-2);border:1px solid var(--line);
    border-radius:26px;padding:clamp(28px,4.4vw,56px);min-height:470px;
    display:flex;flex-direction:column;overflow:hidden}
.qf__bar{position:absolute;top:0;left:0;height:3px;width:100%;background:var(--line)}
.qf__bar i{display:block;height:100%;width:0;background:var(--accent);
           transition:width .45s cubic-bezier(.22,1,.36,1)}
.qf__count{font-size:11px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
           color:var(--dim);margin-bottom:22px}
.qf__stage{flex:1;display:flex;flex-direction:column;justify-content:center}
.qf__step{display:none}
.qf__step.on{display:block;animation:qfin .45s cubic-bezier(.22,1,.36,1)}
@keyframes qfin{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.qf__q{font-family:var(--font-head);font-weight:900;letter-spacing:-.03em;color:var(--text);
       font-size:clamp(1.5rem,3.2vw,2.3rem);line-height:1.08;margin:0}
.qf__sub{font-size:14.4px;margin:12px 0 0;color:var(--muted)}
.qf__in{width:100%;margin-top:26px;background:transparent;border:0;border-bottom:2px solid var(--line-2);
        color:var(--text);font-family:var(--font);font-size:clamp(1.05rem,2vw,1.35rem);
        padding:12px 2px;outline:none;transition:border-color .25s}
.qf__in::placeholder{color:#6f6f82}
.qf__in:focus{border-bottom-color:var(--accent)}
textarea.qf__in{resize:vertical;min-height:112px;line-height:1.55;font-size:clamp(1rem,1.6vw,1.12rem)}
.qf__opts{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:28px}
.qf__opt{display:flex;align-items:center;gap:12px;text-align:left;cursor:pointer;
         background:var(--surface);border:1.5px solid var(--line);border-radius:14px;
         padding:15px 17px;color:var(--text);font-family:var(--font);font-size:14.6px;font-weight:600;
         transition:border-color .22s,background .22s,transform .22s}
.qf__opt:hover{border-color:var(--accent);transform:translateY(-2px)}
.qf__opt.sel{border-color:var(--accent);background:rgba(var(--accent-rgb),.12)}
.qf__opt b{flex:none;width:26px;height:26px;border-radius:7px;display:grid;place-items:center;
           background:var(--surface-2);border:1px solid var(--line);font-size:11.5px;color:var(--muted)}
.qf__opt.sel b{background:var(--accent);border-color:var(--accent);color:#fff}
.qf__math{display:flex;align-items:center;gap:14px;margin-top:26px;flex-wrap:wrap}
.qf__math span{font-family:var(--font-head);font-size:clamp(1.3rem,2.6vw,1.8rem);
               font-weight:900;color:var(--text)}
.qf__math input{width:110px;margin-top:0}
.qf__nav{display:flex;align-items:center;gap:12px;margin-top:34px;flex-wrap:wrap}
.qf__back{background:transparent;border:0;color:var(--muted);font-family:var(--font);
          font-size:13.8px;font-weight:600;cursor:pointer;padding:8px 2px}
.qf__back:hover{color:var(--text)}
.qf__hint{font-size:12.4px;color:var(--dim)}
.qf__err{display:none;margin-top:16px;font-size:13.6px;color:#ff8f8f;font-weight:600}
.qf__err.on{display:block}
.qf__done{display:none;text-align:center;padding:26px 0}
.qf__done.on{display:block;animation:qfin .5s cubic-bezier(.22,1,.36,1)}
.qf__done .tick{width:62px;height:62px;border-radius:50%;margin:0 auto 22px;display:grid;
                place-items:center;background:rgba(63,191,143,.14);border:1.5px solid var(--green)}
.qf__done .tick svg{width:28px;height:28px;fill:none;stroke:var(--green);stroke-width:2.4;
                    stroke-linecap:round;stroke-linejoin:round}
.qf__done h3{font-size:clamp(1.5rem,3vw,2.1rem)}
.qf__done p{margin:14px auto 0;max-width:430px}
.qf__pot{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
@media(max-width:620px){.qf__opts{grid-template-columns:1fr}}