.ckcs-game{
  --blue:#2563eb;--cyan:#22d3ee;--purple:#8b5cf6;--pink:#ec4899;--yellow:#facc15;--green:#22c55e;--red:#fb7185;--dark:#101936;--text:#52617d;
  position:relative;overflow:hidden;padding:70px 16px;border-radius:36px;font-family:Inter,Arial,sans-serif;
  background:radial-gradient(circle at 15% 20%,rgba(34,211,238,.32),transparent 28%),radial-gradient(circle at 85% 12%,rgba(236,72,153,.22),transparent 24%),linear-gradient(135deg,#edf9ff,#f7efff 55%,#fff8dc);
}
.ckcs-lang-switcher{position:absolute;top:18px;right:18px;z-index:20;display:flex;gap:6px;background:rgba(255,255,255,.78);padding:6px;border-radius:999px;backdrop-filter:blur(12px);box-shadow:0 10px 24px rgba(16,25,54,.08)}
.ckcs-lang-switcher button{border:none;border-radius:999px;padding:8px 11px;background:transparent;color:var(--dark);font-size:12px;font-weight:950;cursor:pointer}.ckcs-lang-switcher button.active{background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff}
.ckcs-bg-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(37,99,235,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.06) 1px,transparent 1px);background-size:34px 34px;mask-image:linear-gradient(to bottom,rgba(0,0,0,.75),transparent)}
.ckcs-particles{position:absolute;inset:0;pointer-events:none}.ckcs-particle{position:absolute;width:8px;height:8px;border-radius:50%;background:var(--yellow);animation:ckcsParticle 900ms ease-out forwards}
.ckcs-shell{position:relative;z-index:2;max-width:960px;margin:0 auto;background:rgba(255,255,255,.88);border:1px solid rgba(255,255,255,.8);border-radius:34px;padding:38px;box-shadow:0 30px 90px rgba(37,99,235,.18);backdrop-filter:blur(18px)}
.ckcs-screen{display:none}.ckcs-screen.active{display:block;animation:ckcsFade .35s ease} .ckcs-screen[data-screen="start"],.ckcs-screen[data-screen="level"],.ckcs-screen[data-screen="avatar"],.ckcs-screen[data-screen="end"],.ckcs-level-complete{text-align:center}
.ckcs-logo{width:124px;height:124px;object-fit:contain;display:block;margin:0 auto 20px;filter:drop-shadow(0 20px 24px rgba(37,99,235,.22));animation:ckcsFloat 2.8s ease-in-out infinite}.ckcs-logo.small{width:96px;height:96px}
.ckcs-kicker{display:inline-flex;padding:8px 14px;border-radius:999px;background:#eaf4ff;color:var(--blue);font-size:13px;font-weight:900;text-transform:uppercase;letter-spacing:.05em;margin-bottom:13px}.ckcs-shell h2{margin:0;color:var(--dark);font-size:58px;line-height:1;font-weight:950;letter-spacing:-.055em}.ckcs-shell h3{margin:14px 0 18px;color:var(--dark);font-size:34px;line-height:1.15;font-weight:950;letter-spacing:-.04em}.ckcs-shell p{max-width:650px;margin:16px auto 28px;color:var(--text);font-size:18px;line-height:1.65}
.ckcs-btn{border:none;border-radius:999px;padding:16px 32px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;font-size:16px;font-weight:950;cursor:pointer;box-shadow:0 16px 34px rgba(37,99,235,.3);transition:.22s ease}.ckcs-btn:hover{transform:translateY(-3px);box-shadow:0 20px 44px rgba(37,99,235,.38)}.ckcs-btn.secondary{margin-top:20px;background:var(--dark)}
.ckcs-levels,.ckcs-avatars{display:grid;gap:16px;margin-top:24px}.ckcs-levels{grid-template-columns:repeat(3,1fr)}.ckcs-avatars{grid-template-columns:repeat(4,1fr)}.ckcs-levels button,.ckcs-avatars button{border:2px solid #e5ebff;background:linear-gradient(180deg,#fff,#f8fbff);border-radius:28px;padding:26px 16px;cursor:pointer;box-shadow:0 14px 32px rgba(16,25,54,.07);transition:.25s ease}.ckcs-levels button:hover,.ckcs-avatars button:hover{transform:translateY(-8px);border-color:var(--cyan)}.ckcs-levels strong,.ckcs-avatars span{display:block;color:var(--dark);font-weight:950}.ckcs-levels span{display:block;margin:7px 0;color:var(--blue);font-weight:900}.ckcs-levels small{display:block;color:var(--text);line-height:1.45}.ckcs-avatars img{width:96px;height:96px;object-fit:contain;display:block;margin:0 auto 12px}
.ckcs-hud{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:18px}.ckcs-player,.ckcs-stats{display:flex;align-items:center;gap:14px;background:#fff;border-radius:26px;padding:14px;box-shadow:0 12px 28px rgba(16,25,54,.07)}.ckcs-avatar-img{width:70px;height:70px;object-fit:contain}.ckcs-player strong{display:block;color:var(--dark)}.ckcs-player span{display:block;color:var(--text);font-size:14px;margin-top:3px}.ckcs-stats>div{min-width:72px;text-align:center;padding:8px 10px;border-radius:18px;background:#f7faff}.ckcs-stats small{display:block;color:var(--text);font-weight:800;font-size:11px;text-transform:uppercase}.ckcs-stats strong{display:block;color:var(--dark);font-size:20px;margin-top:2px}.ckcs-lives{font-size:0;display:flex;gap:6px}.ckcs-lives img{width:28px;height:28px;object-fit:contain}.ckcs-lives .empty{opacity:.18;filter:grayscale(1)}
.ckcs-xpbar{height:14px;border-radius:999px;background:#e7edfb;overflow:hidden;margin-bottom:16px}.ckcs-xpbar span{display:block;height:100%;width:0;border-radius:999px;background:linear-gradient(90deg,var(--blue),var(--cyan),var(--yellow));transition:.45s ease}.ckcs-map{display:grid;grid-template-columns:repeat(10,1fr);gap:8px;margin-bottom:22px}.ckcs-map span{height:12px;border-radius:999px;background:#e6ecfb}.ckcs-map span.done{background:linear-gradient(90deg,var(--blue),var(--cyan))}.ckcs-map span.current{background:linear-gradient(90deg,var(--yellow),var(--pink));animation:ckcsBlink 1.2s infinite}
.ckcs-card{position:relative;padding:30px;border-radius:32px;background:linear-gradient(180deg,#fff,#f7faff);box-shadow:inset 0 0 0 1px #edf2ff,0 18px 40px rgba(16,25,54,.07)}.ckcs-card.shake{animation:ckcsShake .35s ease}.ckcs-level-tag{display:inline-flex;padding:7px 12px;border-radius:999px;background:#fff4ce;color:#7a5b00;font-weight:950;font-size:13px;margin-bottom:8px}.ckcs-answers{display:grid;gap:13px;margin-top:22px}.ckcs-answers button{position:relative;border:2px solid #e3e9ff;background:#fff;border-radius:21px;padding:18px 18px 18px 54px;color:var(--dark);font-size:17px;line-height:1.35;font-weight:850;text-align:left;cursor:pointer;transition:.18s ease}.ckcs-answers button:before{content:"?";position:absolute;left:16px;top:50%;transform:translateY(-50%);width:26px;height:26px;display:grid;place-items:center;border-radius:50%;background:#edf4ff;color:var(--blue);font-weight:950}.ckcs-answers button:hover{transform:translateX(6px);border-color:var(--blue)}.ckcs-answers button.correct{border-color:var(--green);background:#ecfdf5}.ckcs-answers button.correct:before{content:"✓";background:var(--green);color:#fff}.ckcs-answers button.wrong{border-color:var(--red);background:#fff1f2}.ckcs-answers button.wrong:before{content:"×";background:var(--red);color:#fff}
.ckcs-feedback{display:none;margin-top:18px;padding:17px 19px;border-radius:22px;background:#fff;color:var(--dark);font-weight:900;box-shadow:0 12px 28px rgba(16,25,54,.07)}.ckcs-feedback.active{display:block;animation:ckcsPop .3s ease}.ckcs-next{display:none;margin-top:18px}.ckcs-certificate{max-width:560px;margin:24px auto 26px;padding:28px;border-radius:30px;background:linear-gradient(#fff,#fff) padding-box,linear-gradient(135deg,var(--blue),var(--cyan),var(--yellow),var(--pink)) border-box;border:3px solid transparent;box-shadow:0 20px 46px rgba(16,25,54,.1)}.ckcs-certificate small{display:block;color:var(--blue);font-weight:950;text-transform:uppercase;letter-spacing:.08em;margin-bottom:8px}.ckcs-certificate strong{display:block;color:var(--dark);font-size:31px;line-height:1.1;margin-bottom:8px}.ckcs-certificate span{color:var(--text);font-weight:800}.ckcs-share{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap}.ckcs-share a,.ckcs-share button:not(.ckcs-btn){border:none;text-decoration:none;border-radius:999px;padding:12px 18px;background:#f1f5ff;color:var(--dark);font-weight:900;cursor:pointer}
@keyframes ckcsFade{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}@keyframes ckcsPop{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}@keyframes ckcsFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes ckcsBlink{0%,100%{opacity:1}50%{opacity:.45}}@keyframes ckcsShake{0%,100%{transform:translateX(0)}25%{transform:translateX(-8px)}75%{transform:translateX(8px)}}@keyframes ckcsParticle{0%{opacity:1;transform:translate(0,0) scale(1)}100%{opacity:0;transform:translate(var(--x),var(--y)) scale(.2)}}
@media(max-width:760px){.ckcs-game{padding:32px 12px;border-radius:24px}.ckcs-shell{padding:58px 16px 24px;border-radius:28px}.ckcs-shell h2{font-size:38px}.ckcs-shell h3{font-size:25px}.ckcs-shell p{font-size:16px}.ckcs-logo{width:92px;height:92px}.ckcs-levels,.ckcs-avatars{grid-template-columns:1fr}.ckcs-hud{flex-direction:column;align-items:stretch}.ckcs-stats{justify-content:space-between}.ckcs-stats>div{min-width:auto;flex:1}.ckcs-card{padding:20px}.ckcs-answers button{font-size:15px;padding:15px 15px 15px 50px}.ckcs-map{gap:5px}}

/* v1.0.1 layout/navigation fixes */
.ckcs-shell{
  min-height:760px;
}
.ckcs-screen.active{
  min-height:684px;
}
.ckcs-screen[data-screen="start"].active,
.ckcs-screen[data-screen="level"].active,
.ckcs-screen[data-screen="avatar"].active,
.ckcs-screen[data-screen="complete"].active,
.ckcs-screen[data-screen="end"].active{
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.ckcs-screen[data-screen="play"].active{
  display:block;
}
.ckcs-back-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  margin:18px auto 0;
  border:none;
  border-radius:999px;
  padding:12px 22px;
  background:#f1f5ff;
  color:var(--dark);
  font-size:14px;
  font-weight:950;
  cursor:pointer;
  transition:.2s ease;
}
.ckcs-back-btn:hover{
  transform:translateY(-2px);
  background:#e8efff;
}
.ckcs-play-actions{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  flex-wrap:wrap;
  margin-top:18px;
}
.ckcs-play-actions .ckcs-next{
  margin-top:0;
}
.ckcs-play-actions .ckcs-back-btn{
  margin:0;
}

@media(max-width:760px){
  .ckcs-shell{min-height:auto;}
  .ckcs-screen.active{min-height:auto;}
  .ckcs-screen[data-screen="start"].active,
  .ckcs-screen[data-screen="level"].active,
  .ckcs-screen[data-screen="avatar"].active,
  .ckcs-screen[data-screen="complete"].active,
  .ckcs-screen[data-screen="end"].active{display:block;}
}

/* v1.0.2 image + centering fixes */
.ckcs-screen[data-screen="start"].active,
.ckcs-screen[data-screen="level"].active,
.ckcs-screen[data-screen="avatar"].active,
.ckcs-screen[data-screen="complete"].active,
.ckcs-screen[data-screen="end"].active{
  align-items:center;
}
.ckcs-kicker{
  width:auto;
  max-width:100%;
  align-self:center;
  justify-content:center;
  text-align:center;
}
.ckcs-screen[data-screen="start"] p,
.ckcs-screen[data-screen="end"] p{
  text-align:center;
}
.ckcs-logo,
.ckcs-avatars img,
.ckcs-avatar-img,
.ckcs-lives img{
  text-indent:-9999px;
}
.ckcs-logo[src=""],
.ckcs-avatars img[src=""],
.ckcs-avatar-img[src=""],
.ckcs-lives img[src=""]{
  visibility:hidden;
}
@media(max-width:760px){
  .ckcs-screen[data-screen="start"].active,
  .ckcs-screen[data-screen="level"].active,
  .ckcs-screen[data-screen="avatar"].active,
  .ckcs-screen[data-screen="complete"].active,
  .ckcs-screen[data-screen="end"].active{
    align-items:stretch;
  }
}


/* v1.0.3 mobile scroll stability */
@media(max-width:760px){
  .ckcs-shell{
    min-height:680px;
  }
  .ckcs-screen.active{
    min-height:600px;
  }
  .ckcs-screen[data-screen="start"].active,
  .ckcs-screen[data-screen="level"].active,
  .ckcs-screen[data-screen="avatar"].active,
  .ckcs-screen[data-screen="complete"].active,
  .ckcs-screen[data-screen="end"].active{
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
  }
  .ckcs-screen[data-screen="play"].active{
    display:block;
    min-height:600px;
  }
}