/* Nunito cyrillic-ext */

@font-face {
  font-family: 'Nunito';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url(/fonts/nunito-normal-cyrillic-ext.woff2) format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* Nunito cyrillic */
@font-face {
  font-family: 'Nunito';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url(/fonts/nunito-normal-cyrillic.woff2) format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* Nunito latin-ext */
@font-face {
  font-family: 'Nunito';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url(/fonts/nunito-normal-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* Nunito latin */
@font-face {
  font-family: 'Nunito';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url(/fonts/nunito-normal-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;
}

:root{--red:#d3192c;--red2:#ff4d5e;--deep:#7a0c18;--blue:#2fa8e6;--sky:#e6f6ff;--sky2:#bfe7fb;--ink:#14324a;--muted:#5b7286;--ok:#16a36a;--bad:#e23a3a;--card:#ffffff;--r:20px;--shadow:0 10px 30px rgba(20,50,74,.12)}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{font-family:Nunito,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;font-size:17px;line-height:1.45;color:var(--ink);background:linear-gradient(180deg,#f3fbff 0%,#ffffff 40%,#fff5f6 100%);min-height:100vh;min-height:100dvh}
button{font-family:inherit;font-size:16px;cursor:pointer;color:inherit}
img{max-width:100%;display:block}
.hidden{display:none!important}
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;padding:10px 14px;padding-top:max(10px,env(safe-area-inset-top));background:rgba(255,255,255,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid #e5f1f8}
.brand{display:flex;align-items:center;gap:8px;background:none;border:0;font-weight:800;font-size:18px;padding:4px}
.brand b{color:var(--red)}
.drop{width:18px;height:18px;border-radius:50% 50% 50% 0;transform:rotate(-45deg);background:linear-gradient(135deg,var(--red2),var(--red));box-shadow:0 2px 6px rgba(211,25,44,.4)}
.topright{display:flex;gap:8px;align-items:center}
.iconbtn{width:44px;height:44px;border-radius:14px;border:1px solid #d6ebf7;background:#fff;font-size:20px}
.scorechip{background:var(--sky);border:1px solid var(--sky2);padding:8px 12px;border-radius:999px;font-weight:800}
.screen{display:none;animation:fadeIn .45s ease}
.screen.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.wrap{max-width:760px;margin:0 auto;padding:14px 14px calc(30px + env(safe-area-inset-bottom))}
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:18px;margin:14px 0;border:1px solid #eef6fb}
h1,h2,h3{margin:.2em 0 .4em;line-height:1.2}
h2{font-size:21px}
.muted{color:var(--muted);margin:.2em 0 .6em}

/* hero */
.hero{position:relative;overflow:hidden;min-height:430px;display:flex;align-items:center;justify-content:center;text-align:center;background:radial-gradient(ellipse at 50% 30%,#ffffff 0%,#e6f6ff 55%,#cdeefd 100%)}
#bg3d{position:absolute;inset:0;width:100%;height:100%}
.hero-inner{position:relative;z-index:2;padding:34px 18px;max-width:640px}
.hero-inner::before{content:"";position:absolute;inset:10px -6px;background:rgba(255,255,255,.72);border-radius:28px;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:-1;box-shadow:0 10px 40px rgba(47,168,230,.18)}
.pill{display:inline-block;background:#fff;border:1px solid var(--sky2);color:#1676ad;font-weight:700;font-size:14px;padding:6px 12px;border-radius:999px}
.hero h1{font-size:clamp(30px,8vw,48px);font-weight:900;margin:14px 0 8px;background:linear-gradient(90deg,var(--red) 0%,#ff5468 45%,var(--blue) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;animation:titleIn .9s cubic-bezier(.2,1.4,.4,1) both}
@keyframes titleIn{from{opacity:0;transform:scale(.85) translateY(10px)}to{opacity:1;transform:none}}
.lead{font-size:18px;margin:0 0 18px}
.meta{font-size:14px;color:var(--muted);margin-top:14px}
.cssfallback{position:absolute;inset:0;pointer-events:none}
.cssfallback i{position:absolute;width:70px;height:70px;border-radius:50%;background:radial-gradient(circle at 50% 50%,#9c0f1e 0 22%,#d3192c 40%,#ff6b78 75%,#d3192c 100%);box-shadow:inset 0 -6px 12px rgba(0,0,0,.25);opacity:.85;animation:drift 12s linear infinite}
.cssfallback i:nth-child(1){left:6%;top:12%}.cssfallback i:nth-child(2){left:78%;top:20%;animation-delay:-3s;transform:scale(.7)}.cssfallback i:nth-child(3){left:15%;top:72%;animation-delay:-6s}.cssfallback i:nth-child(4){left:70%;top:75%;animation-delay:-8s}.cssfallback i:nth-child(5){left:45%;top:5%;animation-delay:-2s}
.has3d .cssfallback{display:none}
@keyframes drift{0%{transform:translateY(0) rotateX(55deg) rotateZ(0)}50%{transform:translateY(-20px) rotateX(35deg) rotateZ(180deg)}100%{transform:translateY(0) rotateX(55deg) rotateZ(360deg)}}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:12px 22px;border-radius:16px;border:2px solid transparent;font-weight:800;font-size:17px;transition:transform .12s,box-shadow .2s,background .2s}
.btn:active{transform:scale(.97)}
.btn.primary{background:linear-gradient(135deg,#ff4d5e,var(--red));color:#fff;box-shadow:0 8px 22px rgba(211,25,44,.35)}
.btn.primary:disabled{opacity:.45;box-shadow:none}
.btn.blue{background:linear-gradient(135deg,#4cc3ff,#1d8fd0);color:#fff;box-shadow:0 8px 22px rgba(29,143,208,.3)}
.btn.ghost{background:#fff;border-color:var(--sky2);color:#1676ad;margin-top:10px}
.btn.big{font-size:19px;min-height:58px;padding:14px 28px;border-radius:18px}
.pulse{animation:pulse 2.2s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 8px 22px rgba(211,25,44,.35),0 0 0 0 rgba(211,25,44,.35)}50%{box-shadow:0 8px 22px rgba(211,25,44,.35),0 0 0 14px rgba(211,25,44,0)}}
.hero-img-card{padding:10px;overflow:hidden}
.float-img{border-radius:14px;width:100%;animation:floaty 6s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(-6px) scale(1.015)}}
.tags{display:flex;gap:8px;flex-wrap:wrap;padding:10px 4px 2px}
.tag{padding:6px 12px;border-radius:999px;font-weight:700;font-size:14px}
.tag.red{background:#ffe5e8;color:var(--deep)}.tag.blue{background:var(--sky);color:#11689a}.tag.yellow{background:#fff4d6;color:#8a5a00}
.viewer{position:relative;height:280px;border-radius:16px;background:radial-gradient(circle,#ffffff,#e3f4fd);overflow:hidden;touch-action:none}
#viewer3d{width:100%;height:100%;display:block}
.viewer-fallback{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--muted);padding:20px;text-align:center}
.seg{display:flex;gap:6px;margin-top:10px;background:var(--sky);padding:5px;border-radius:14px}
.segbtn{flex:1;min-height:44px;border:0;border-radius:10px;background:transparent;font-weight:700}
.segbtn.on{background:#fff;color:var(--red);box-shadow:0 2px 8px rgba(0,0,0,.08)}
.viewer-note{font-size:15px;color:var(--muted);margin:10px 2px 0}
.types{list-style:none;padding:0;margin:0 0 14px}
.types li{display:flex;gap:10px;align-items:center;padding:8px 0;border-bottom:1px dashed #e4eef5}
.types li span{width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;background:var(--sky);border-radius:10px}
.credits summary{font-weight:800;cursor:pointer;min-height:30px}
.credits li{font-size:14px;margin:6px 0;color:var(--muted)}
.credits a{color:#1676ad}

/* quiz */
.progress{height:10px;background:#e3f1f9;border-radius:99px;overflow:hidden;margin-top:4px}
.bar{height:100%;width:0;background:linear-gradient(90deg,var(--red2),var(--red));border-radius:99px;transition:width .5s ease}
.qhead{display:flex;justify-content:space-between;align-items:center;margin:12px 2px 0;gap:8px}
.qnum{font-weight:900;color:var(--red);font-size:18px}
.qtype{font-size:14px;font-weight:700;background:var(--sky);color:#11689a;padding:5px 10px;border-radius:999px;text-align:right}
.qcard{animation:slideIn .4s ease}
@keyframes slideIn{from{opacity:0;transform:translateX(24px)}to{opacity:1;transform:none}}
.qtitle{font-size:20px;font-weight:900;margin:0 0 6px}
.qtext{margin:0 0 12px}
.figure{position:relative;border-radius:16px;overflow:hidden;background:#0d1b26;margin:0 0 6px;user-select:none;-webkit-user-select:none}
.figure img{width:100%;height:auto}
.figure.light{background:#f6fbff}
.caption{font-size:13px;color:var(--muted);margin:2px 2px 12px}
.imgrow{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:6px}
.imgrow .figure{margin:0}
.opts{display:grid;gap:10px;margin-top:6px}
.opt{text-align:left;min-height:54px;padding:12px 14px;border-radius:14px;border:2px solid #d9ebf6;background:#fff;font-weight:700;font-size:16px;display:flex;align-items:center;gap:10px;transition:border-color .2s,background .2s,transform .1s}
.opt .k{flex:none;width:30px;height:30px;border-radius:9px;background:var(--sky);display:inline-flex;align-items:center;justify-content:center;color:#11689a;font-weight:900}
.opt:active{transform:scale(.98)}
.opt.correct{border-color:var(--ok);background:#e8f8f0}
.opt.correct .k{background:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:#fdecec}
.opt.wrong .k{background:var(--bad);color:#fff}
.opt:disabled{cursor:default}
.tf{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:8px}
.tf .opt{justify-content:center;font-size:18px}
.statement{background:#fff7e8;border-left:5px solid #f3b13b;padding:12px 14px;border-radius:12px;font-weight:700;margin:6px 0 10px}

/* hotspots */
.hs{position:absolute;border-radius:50%;border:0;background:transparent;padding:0;transform:translate(-50%,-50%)}
.hs.shown{border:3px solid #fff;box-shadow:0 0 0 3px rgba(0,0,0,.25)}
.hs.good{border:4px solid var(--ok);background:rgba(22,163,106,.15);animation:pop .4s}
.hs.badmark{border:4px solid var(--bad);background:rgba(226,58,58,.15);animation:pop .4s}
.tapmark{position:absolute;width:26px;height:26px;margin:-13px 0 0 -13px;border-radius:50%;border:3px solid #fff;background:rgba(226,58,58,.7);pointer-events:none;animation:pop .35s}
.ringmark{position:absolute;width:13%;aspect-ratio:1;transform:translate(-50%,-50%);border:3px solid #1d8fd0;border-radius:50%;pointer-events:none;animation:ringp 1.6s ease-in-out infinite;box-shadow:0 0 0 3px rgba(255,255,255,.7)}
@keyframes ringp{0%,100%{transform:translate(-50%,-50%) scale(1)}50%{transform:translate(-50%,-50%) scale(1.15)}}
@keyframes pop{0%{transform:translate(-50%,-50%) scale(.6)}70%{transform:translate(-50%,-50%) scale(1.12)}100%{transform:translate(-50%,-50%) scale(1)}}
.tapmark{animation:none}
.layerlbl{position:absolute;left:52%;transform:translateY(-50%);background:rgba(255,255,255,.92);border-radius:10px;padding:4px 8px;font-size:13px;font-weight:800;white-space:nowrap}
.pin{position:absolute;transform:translate(-50%,-50%);width:46px;height:46px;border-radius:50%;border:3px solid #fff;background:rgba(29,143,208,.88);color:#fff;font-weight:900;font-size:19px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(0,0,0,.35);padding:0}
.pin::after{content:"";position:absolute;inset:-9px;border-radius:50%;border:2px solid rgba(255,255,255,.85);animation:ringp2 1.8s ease-out infinite}
@keyframes ringp2{from{opacity:1;transform:scale(.8)}to{opacity:0;transform:scale(1.5)}}
.pin.sel{background:var(--red)}
.pin.ok{background:var(--ok)}.pin.no{background:var(--bad)}
.pin.small{width:40px;height:40px}

/* matching */
.slots{display:grid;gap:10px;margin:10px 0}
.slots.grid3{grid-template-columns:repeat(3,1fr)}
.slot{border:2px dashed #b9dcf0;border-radius:14px;padding:8px;background:#fff;display:flex;flex-direction:column;gap:8px;align-items:stretch;text-align:center;font-weight:700;min-height:54px}
.slot.row{flex-direction:row;align-items:center;text-align:left}
.slot.active{border-color:var(--red);border-style:solid;box-shadow:0 0 0 4px rgba(211,25,44,.12)}
.slot .pic{border-radius:10px;overflow:hidden;aspect-ratio:1;background:#eef7fc}
.slot .pic img{width:100%;height:100%;object-fit:cover}
.slot .pic.wide{aspect-ratio:4/3}
.slot .lbl{font-size:13px;color:var(--muted)}
.slot .num{flex:none;width:40px;height:40px;border-radius:50%;background:#1d8fd0;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:900;font-size:18px}
.drop-in{min-height:44px;border-radius:10px;background:var(--sky);display:flex;align-items:center;justify-content:center;padding:6px 8px;font-size:15px;color:#11689a;flex:1;line-height:1.2}
.drop-in.filled{background:#fff0f2;color:var(--deep);border:2px solid #ffc9cf}
.drop-in.ok{background:#e8f8f0;color:#0d6b45;border:2px solid var(--ok)}
.drop-in.no{background:#fdecec;color:#9b1c1c;border:2px solid var(--bad)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 12px}
.chip{min-height:46px;padding:10px 14px;border-radius:999px;border:2px solid #ffc9cf;background:#fff;font-weight:800;color:var(--deep);font-size:16px}
.chip.sel{background:var(--red);color:#fff;border-color:var(--red);transform:scale(1.04)}
.chip.used{opacity:.35}
.hint{font-size:14px;color:var(--muted);margin:2px 0 6px}

/* multi select cards */
.mgrid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mcard{position:relative;border:3px solid #d9ebf6;border-radius:16px;overflow:hidden;padding:0;background:#fff}
.mcard img{width:100%;aspect-ratio:1;object-fit:cover}
.mcard .letter{position:absolute;top:8px;left:8px;width:36px;height:36px;border-radius:12px;background:rgba(255,255,255,.95);font-weight:900;display:flex;align-items:center;justify-content:center;font-size:18px}
.mcard .check{position:absolute;top:8px;right:8px;width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.9);border:2px solid #b9dcf0;display:flex;align-items:center;justify-content:center;font-size:20px}
.mcard.sel{border-color:var(--red)}
.mcard.sel .check{background:var(--red);color:#fff;border-color:var(--red)}
.mcard .name{display:none;padding:6px 8px;font-size:14px;font-weight:800}
.mcard.reveal .name{display:block}
.mcard.ok{border-color:var(--ok)}.mcard.no{border-color:var(--bad)}
.mcard.miss{border-color:#f3b13b;border-style:dashed}

/* feedback */
.fb{margin-top:14px;border-radius:16px;padding:14px;animation:fadeIn .35s}
.fb.good{background:#e8f8f0;border:2px solid #9be3c2}
.fb.bad{background:#fdecec;border:2px solid #f6b2b2}
.fb h3{margin:0 0 6px;font-size:19px}
.fb p{margin:0;font-size:16px}
.actions{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.actions .btn{flex:1}
.shake{animation:shake .45s}
@keyframes shake{20%,60%{transform:translateX(-7px)}40%,80%{transform:translateX(7px)}}

/* infographic */
.info{background:linear-gradient(180deg,#ffffff,#eef8fe);border-radius:16px;padding:10px}
.info svg{width:100%;height:auto;display:block}

/* result */
.result-card{text-align:center}
.ring{position:relative;width:170px;height:170px;margin:6px auto 6px}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:12}
.ring .track{stroke:#e3f1f9}
.ring .val{stroke:url(#g);stroke:var(--red);stroke-linecap:round;stroke-dasharray:326.7;stroke-dashoffset:326.7;transition:stroke-dashoffset 1.2s ease}
.ringtxt{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column}
.ringtxt b{font-size:46px;line-height:1;color:var(--red)}
.ringtxt span{color:var(--muted);font-weight:700}
.verdict{font-size:30px;font-weight:900;margin:8px 0 2px}
.reviews{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:16px 0}
.rv{border-radius:12px;padding:8px 4px;font-weight:800;font-size:14px;background:#e8f8f0;color:#0d6b45}
.rv.no{background:#fdecec;color:#9b1c1c}
#confetti{position:fixed;inset:0;pointer-events:none;z-index:50;overflow:hidden}
#confetti i{position:absolute;top:-20px;width:10px;height:16px;border-radius:3px;animation:fall linear forwards}
@keyframes fall{to{transform:translateY(110vh) rotate(720deg)}}
@media (min-width:700px){.hero{min-height:500px}.viewer{height:340px}.mgrid{grid-template-columns:repeat(4,1fr)}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.imgrow.tuberow{grid-template-columns:.8fr 1.2fr}