:root{--ink:#0b3340;--accent:#ff7f50;--shadow:0 6px 0 rgba(0,0,0,.18)}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;overflow:hidden}
body{font-family:'Rubik','Arial Rounded MT Bold',system-ui,sans-serif;font-weight:800;color:var(--ink);
  background:linear-gradient(160deg,#7ee8d6 0%,#35c2c9 45%,#2d8fd8 100%);touch-action:manipulation;user-select:none;-webkit-user-select:none}
#app{height:100dvh;position:relative}
.screen{display:none;height:100%;flex-direction:column}.screen.active{display:flex}
#screen-home,#screen-shop{overflow:auto}
.hidden{display:none!important}
button{font:inherit;color:inherit;border:0;cursor:pointer;background:none}
.coin{display:inline-block;width:1em;height:1em;border-radius:50%;background:radial-gradient(circle at 35% 35%,#ffe98a,#f2b632 60%,#c98a1a);box-shadow:inset 0 0 0 2px #ffd25a,0 1px 0 #a86f12;vertical-align:-.12em}
.bar{display:flex;align-items:center;gap:12px;padding:10px 14px;background:rgba(255,255,255,.3)}
.bar h2{flex:1;margin:0;font-size:22px;text-align:center;font-weight:900}
.icon-btn{width:46px;height:46px;border-radius:14px;background:#fff;box-shadow:var(--shadow);font-size:24px;display:grid;place-items:center;text-decoration:none;color:var(--ink)}
.icon-btn:active{transform:translateY(3px)}
.coin-pill{background:#fff;border-radius:999px;padding:8px 14px;font-size:18px;box-shadow:var(--shadow);min-width:80px;text-align:center}
.home-top{display:flex;justify-content:space-between;align-items:center;padding:14px}
.home-tools{display:flex;gap:10px}
.lang-switch{display:flex;gap:6px;background:#fff;border-radius:999px;padding:4px;box-shadow:var(--shadow)}
.lang-switch button{padding:6px 12px;border-radius:999px;font-size:14px;font-weight:900;opacity:.55}
.lang-switch button.active{background:#0fb9b1;color:#fff;opacity:1}
.home-hero{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:0 16px}
.logo{font-size:clamp(32px,8vw,66px);margin:0;line-height:1.05;color:#fff;text-shadow:0 4px 0 #0a7d8c,0 10px 22px rgba(0,0,0,.25);transform:rotate(-2deg)}
.subtitle{font-size:clamp(17px,4vw,24px);margin:10px 0 18px;color:#083f4d}
.home-menu{display:flex;flex-direction:column;gap:14px;padding:16px;max-width:520px;width:100%;margin:0 auto 16px}
.big-btn{display:flex;align-items:center;gap:16px;padding:14px 20px;border-radius:24px;color:#fff;font-size:26px;box-shadow:0 8px 0 rgba(0,0,0,.2);text-align:start}
.big-btn:active{transform:translateY(5px);box-shadow:0 3px 0 rgba(0,0,0,.2)}
.big-btn .ico{font-size:34px;background:rgba(255,255,255,.25);border-radius:18px;width:64px;height:64px;display:grid;place-items:center;flex:none}
.big-btn span:last-child{display:flex;flex-direction:column}.big-btn small{font-size:14px;opacity:.95;font-weight:700}
.big-btn.green{background:linear-gradient(#7fd65a,#57b43a)}.big-btn.blue{background:linear-gradient(#6aa8ff,#3a6fe0)}
.levels-grid{flex:1;overflow:auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:14px;padding:18px;align-content:start}
.level-card{aspect-ratio:1;border-radius:22px;background:#fff;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:34px;font-weight:900;position:relative}
.level-card:active{transform:scale(.95)}.level-card.locked{opacity:.45}
.level-card .stars{font-size:14px;letter-spacing:-2px;height:18px}
.level-card .tag{position:absolute;top:6px;inset-inline-end:9px;font-size:13px;opacity:.6}
.level-card.done{background:linear-gradient(#fff,#dff7f3)}
/* игра */
.progress{display:flex;gap:8px;justify-content:center;padding:10px;direction:ltr}
.progress i{width:34px;height:12px;border-radius:999px;background:rgba(255,255,255,.5)}
.progress i.ok{background:#57b43a}.progress i.meh{background:#f5b921}.progress i.cur{background:#fff;box-shadow:0 0 0 3px var(--accent)}
.question{text-align:center;padding:2px 12px 0}
.q-text{font-size:clamp(15px,3.4vw,20px);color:#083f4d}
.q-main{font-size:clamp(44px,11vw,84px);line-height:1.1;font-weight:900;color:#fff;text-shadow:0 4px 0 #0a7d8c;min-height:1.1em;direction:ltr;display:flex;gap:14px;justify-content:center;align-items:center;flex-wrap:wrap}
.stage{flex:1;min-height:0;display:flex;flex-direction:column;gap:14px;align-items:center;justify-content:center;padding:6px 10px}
/* карточки: всегда слева направо, старший разряд слева */
.cards{display:flex;gap:clamp(5px,1.4vw,12px);direction:ltr;justify-content:center}
.slot{display:flex;flex-direction:column;align-items:center;gap:4px}
.card{--w:clamp(44px,calc((100vw - 40px) / var(--n) - 12px),116px);width:var(--w);height:calc(var(--w) * 1.3);perspective:600px;position:relative}
.card .inner{position:absolute;inset:0;transition:transform .35s;transform-style:preserve-3d}
.card.off .inner{transform:rotateY(180deg)}
.face,.back{position:absolute;inset:0;border-radius:14%;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:grid;place-items:center;box-shadow:var(--shadow)}
.face{background:#fff;border:4px solid var(--accent);color:var(--accent);font-size:calc(var(--w) * .46);font-weight:900}
.face svg{width:84%;height:84%}
.back{transform:rotateY(180deg);background:repeating-linear-gradient(45deg,#0b4a5c 0 8px,#0e5a70 8px 16px);border:4px solid #fff;color:#ffffffcc;font-size:calc(var(--w) * .46);font-weight:900}
button.card:active{filter:brightness(.95)}
.place{font-size:clamp(17px,3.8vw,26px);font-weight:900;color:#083f4d}
.bit{font-size:clamp(20px,4.6vw,32px);font-weight:900;color:#fff;text-shadow:0 2px 0 #0a7d8c;line-height:1}
.total{font-size:clamp(24px,5.5vw,38px);color:#fff;text-shadow:0 3px 0 #0a7d8c;direction:ltr}
.cards.shake{animation:shake .4s}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-10px)}75%{transform:translateX(10px)}}
.cards.mini .card{--w:clamp(26px,6.5vw,44px)}.cards.mini{gap:4px}
.pick{background:rgba(255,255,255,.3);border-radius:22px;padding:12px 14px;border:4px solid transparent}
.pick:active{transform:scale(.97)}.pick.right{border-color:#57b43a;background:rgba(255,255,255,.6)}.pick.wrong{animation:shake .4s;opacity:.4;pointer-events:none}
.game-footer{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;padding:10px 12px 22px;min-height:96px;direction:ltr}
.go-btn{background:linear-gradient(#7fd65a,#57b43a);color:#fff;font-size:24px;font-weight:900;padding:12px 40px;border-radius:999px;box-shadow:0 7px 0 #3c8a26}
.go-btn:active{transform:translateY(5px);box-shadow:0 2px 0 #3c8a26}
.opt{min-width:clamp(64px,18vw,110px);padding:10px 14px;background:#fff;border-radius:22px;box-shadow:0 7px 0 rgba(0,0,0,.18);font-size:clamp(28px,7vw,44px);font-weight:900}
.opt:active{transform:translateY(5px);box-shadow:0 2px 0 rgba(0,0,0,.18)}
.opt.wrong{animation:shake .4s;opacity:.35;pointer-events:none}.opt.right{outline:6px solid #57b43a}
.toast{position:absolute;left:50%;bottom:112px;transform:translateX(-50%);background:#fff;padding:10px 20px;border-radius:22px;font-size:17px;box-shadow:0 8px 20px rgba(0,0,0,.25);z-index:20;text-align:center;width:max-content;max-width:90vw;pointer-events:none}
/* магазин */
.shop{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:14px;padding:18px}
.shop-item{background:#fff;border-radius:22px;padding:14px 8px;display:flex;flex-direction:column;align-items:center;gap:8px;box-shadow:var(--shadow)}
.shop-item:active{transform:scale(.96)}.shop-item.selected{outline:4px solid #57b43a}
.shop-item .card{--w:60px}
.shop-item .price{font-size:14px;background:#ffe17a;border-radius:999px;padding:3px 10px}.shop-item.owned .price{background:#d9f2cc}
/* модалка, конфетти */
.modal{position:fixed;inset:0;background:rgba(5,40,55,.55);display:grid;place-items:center;z-index:100;padding:16px}
.modal-card{background:#fff;border-radius:28px;padding:26px 24px;text-align:center;max-width:380px;width:100%;box-shadow:0 20px 50px rgba(0,0,0,.35);animation:pop .3s cubic-bezier(.2,1.4,.4,1)}
@keyframes pop{from{transform:scale(.4);opacity:0}to{transform:scale(1);opacity:1}}
.modal-emoji{font-size:54px;line-height:1;letter-spacing:2px}.modal-card h2{margin:10px 0 4px;font-size:30px}#modal-text{margin:0 0 18px;font-size:18px;color:#3d5a66;line-height:1.35}
.modal-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.modal-actions button{padding:12px 22px;border-radius:999px;color:#fff;font-size:18px;font-weight:900;box-shadow:0 5px 0 rgba(0,0,0,.2)}
.modal-actions .primary{background:linear-gradient(#7fd65a,#57b43a)}.modal-actions .secondary{background:#7f9aa8}
#confetti{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:90}
.confetti-piece{position:absolute;top:-20px;width:12px;height:18px;border-radius:3px;animation:fall linear forwards}
@keyframes fall{to{transform:translateY(110vh) rotate(720deg);opacity:.8}}
@media (max-height:640px){.q-main{font-size:40px}.game-footer{min-height:76px;padding-bottom:12px}}

.help-btn{position:absolute;inset-inline-end:14px;bottom:24px;width:56px;height:56px;border-radius:50%;background:#fff;color:var(--ink);font-size:28px;font-weight:900;box-shadow:var(--shadow);z-index:5}
.help-btn:active{transform:translateY(3px)}
.hint-btn{background:#ffe17a;color:var(--ink);font-size:26px;width:60px;height:60px;border-radius:50%;box-shadow:0 7px 0 #c9a227}
.hint-btn:active{transform:translateY(5px);box-shadow:0 2px 0 #c9a227}
.intro-demo{display:flex;flex-direction:column;align-items:center;gap:6px;margin:0 0 14px;direction:ltr}
.intro-demo .eq{display:flex;align-items:center;gap:10px;font-size:30px;font-weight:900;color:var(--ink)}
.intro-demo .card{--w:54px}
.intro-demo .cards .card{--w:46px}
.intro-demo .place{color:var(--ink);font-size:15px}.intro-demo .bit{color:var(--ink);text-shadow:none;font-size:20px}
.intro-demo .total{color:var(--ink);text-shadow:none;font-size:24px}