:root{
  --ink:#29413e;
  --green:#17845e;
  --yellow:#ffca3a;
  --blue:#8fdfff;
  --pink:#ffb5d2;
  --paper:rgba(255,255,255,.9);
  --shadow:0 14px 36px rgba(41,65,62,.15);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink)}
body{
  background:
    radial-gradient(circle at 8% 10%,rgba(255,255,255,.85) 0 75px,transparent 76px),
    radial-gradient(circle at 92% 7%,rgba(255,255,255,.75) 0 95px,transparent 96px),
    linear-gradient(155deg,#fff3c8,#dff8ff 58%,#f8e7ff);
}
a,button{font:inherit}
.page{width:min(1120px,100%);margin:auto;padding:14px}
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 13px;border-radius:21px;background:rgba(255,255,255,.88);
  border:2px solid rgba(255,255,255,.95);box-shadow:var(--shadow);backdrop-filter:blur(9px)
}
.home{
  text-decoration:none;display:inline-flex;align-items:center;gap:7px;
  padding:10px 14px;border-radius:15px;background:#fff1aa;color:#695000;
  font-weight:950;box-shadow:0 5px 0 #d9b33a
}
.stats{display:flex;gap:9px;flex-wrap:wrap;justify-content:flex-end}
.pill{padding:8px 12px;border-radius:999px;background:#eafff2;color:#176d50;font-weight:950}
.hero{
  margin-top:14px;padding:clamp(17px,3vw,28px);
  border-radius:28px;background:var(--paper);border:3px solid rgba(255,255,255,.96);box-shadow:var(--shadow);text-align:center
}
.hero h1{margin:0;color:var(--green);font-size:clamp(28px,5vw,48px)}
.hero p{margin:8px auto 0;max-width:760px;font-size:18px;line-height:1.5;font-weight:700;color:#526a65}
.worlds{
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin-top:18px
}
.world-card{
  border:0;border-radius:23px;padding:18px 12px;background:#fff;
  box-shadow:0 8px 0 #d8eaee,0 14px 25px rgba(41,65,62,.09);
  text-decoration:none;color:var(--ink);text-align:center;transition:.18s transform;min-height:210px
}
.world-card:hover{transform:translateY(-5px)}
.world-card.locked{opacity:.58;filter:grayscale(.35);pointer-events:none}
.world-icon{font-size:68px}
.world-card h2{margin:9px 0 5px;color:#216b55;font-size:20px}
.world-card p{margin:0;font-size:14px;font-weight:700;color:#657874;line-height:1.4}
.stars{margin-top:10px;font-size:18px;min-height:25px}
.game-shell{
  margin-top:14px;padding:clamp(16px,3vw,28px);border-radius:28px;
  background:var(--paper);border:3px solid rgba(255,255,255,.96);box-shadow:var(--shadow)
}
.level-head{text-align:center}
.level-head h1{margin:0;color:#d46d00;font-size:clamp(27px,4vw,43px)}
.level-head p{margin:7px 0 0;font-weight:750;color:#526a65}
.progress{height:14px;background:#e5f0f1;border:2px solid #d1e5e7;border-radius:999px;overflow:hidden;margin:13px auto 0;max-width:570px}
.progress>div{height:100%;width:0;background:linear-gradient(90deg,#62d68c,#ffca3a);transition:.25s width}
.board{
  display:grid;gap:12px;margin:24px auto 16px;max-width:760px;justify-content:center
}
.cell{
  aspect-ratio:1/1;border:4px solid transparent;border-radius:19px;background:#fff;
  display:grid;place-items:center;font-size:clamp(35px,6vw,65px);cursor:pointer;
  box-shadow:0 7px 0 #d8eaee;transition:.16s transform,.16s border-color,.16s background;
  user-select:none;-webkit-user-select:none
}
.cell:hover{transform:translateY(-3px)}
.cell:active{transform:translateY(4px);box-shadow:0 3px 0 #d8eaee}
.cell.wrong{animation:shake .34s ease;border-color:#ff7d7d;background:#fff0f0}
.cell.correct{animation:pop .42s ease;border-color:#55d68d;background:#eafff2}
.message{min-height:42px;text-align:center;font-weight:950;color:var(--green);font-size:clamp(18px,2.6vw,26px)}
.actions{display:flex;justify-content:center;gap:11px;flex-wrap:wrap;margin-top:10px}
.btn{
  border:0;border-radius:17px;padding:12px 18px;background:var(--yellow);color:#604300;
  box-shadow:0 6px 0 #d49b00;font-weight:950;cursor:pointer;text-decoration:none
}
.btn.secondary{background:var(--blue);box-shadow:0 6px 0 #4faec9;color:#164957}
.btn.green{background:#78df9b;box-shadow:0 6px 0 #3ca964;color:#155b38}
.btn:active{transform:translateY(4px);box-shadow:0 2px 0 rgba(0,0,0,.22)}
.overlay{
  position:fixed;inset:0;z-index:30;display:none;place-items:center;padding:18px;
  background:rgba(31,55,54,.48);backdrop-filter:blur(7px)
}
.overlay.show{display:grid}
.modal{
  width:min(520px,100%);padding:27px;border-radius:29px;background:#fff;border:5px solid #fff1aa;
  text-align:center;box-shadow:0 30px 80px rgba(0,0,0,.26);animation:pop .35s ease
}
.modal .icon{font-size:86px}.modal h2{margin:8px 0;color:var(--green);font-size:32px}.modal p{font-size:17px;font-weight:750;line-height:1.5}
.big-stars{font-size:40px;letter-spacing:4px}
.site-footer{margin:18px 0 5px;padding:15px;text-align:center;border-radius:19px;background:rgba(255,255,255,.78);font-size:14px;font-weight:750;color:#586e69}
.site-footer a{margin:0 7px;color:#176d55}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-8px)}50%{transform:translateX(8px)}75%{transform:translateX(-5px)}}
@keyframes pop{0%{transform:scale(.76)}70%{transform:scale(1.07)}100%{transform:scale(1)}}
@media(max-width:850px){.worlds{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){
  .page{padding:9px}.topbar{align-items:flex-start;flex-direction:column}.stats{justify-content:flex-start}
  .worlds{grid-template-columns:1fr}.world-card{min-height:170px}.board{gap:8px}.cell{border-radius:14px;border-width:3px}
}