:root {
  --ink:#16385f; --orange:#f28a2e; --green:#55a85a; --red:#ef4056;
  --yellow:#ffbe21; --purple:#7b45b5; --blue:#2282d0; --soft:#edf5fb;
  --line:#d8e4ec; --text:#24313d; --muted:#667482; --cream:#fffaf2;
  --shadow:0 14px 38px rgba(22,56,95,.13);
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:linear-gradient(180deg,#fff 0,#f5faff 100%);min-height:100vh}
button,a{font:inherit}
.topbar{min-height:68px;padding:8px max(18px,env(safe-area-inset-right)) 8px max(18px,env(safe-area-inset-left));display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:900;letter-spacing:.07em;color:var(--ink)}
.brand img{width:50px;height:50px;object-fit:cover;border-radius:13px}
.home-link{color:var(--ink);font-weight:800;text-decoration:none}
.app-shell{width:min(1160px,calc(100% - 28px));margin:0 auto;padding:20px 0 42px}
.intro{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:22px;align-items:center;margin-bottom:18px}
.eyebrow{margin:0 0 8px;color:var(--orange);font-weight:900;letter-spacing:.12em;font-size:.78rem}
.intro h1{margin:0;color:var(--ink);font-size:clamp(2rem,5vw,3.6rem);line-height:.98}
.intro h1 span{background:linear-gradient(90deg,#ef4056,#f28a2e,#ffbe21,#55a85a,#2282d0,#7b45b5);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{max-width:680px;font-size:1.02rem;color:var(--muted);margin:.55rem 0 0}
.mascot-note{background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow)}
.mascot-note img{width:72px;height:72px;object-fit:cover;border-radius:16px}
.mascot-note p{margin:0;color:var(--muted);font-size:.96rem}
.control-panel{display:flex;justify-content:space-between;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px 14px;box-shadow:0 8px 24px rgba(22,56,95,.07)}
.level-select,.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.chip,.button,.icon-button{border:0;border-radius:999px;min-height:42px;padding:0 16px;font-weight:900;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}
.chip{background:var(--soft);color:var(--ink)}
.chip.active{background:var(--orange);color:#fff;box-shadow:0 6px 15px rgba(242,138,46,.27)}
.button.primary{background:var(--ink);color:#fff}
.button.secondary{background:#fff;color:var(--ink);border:2px solid var(--ink);text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.icon-button{background:#fff1d7;color:#6d4b00}
.button:hover,.chip:hover,.icon-button:hover{transform:translateY(-2px)}
.scorebar{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:14px 0}
.scorebar>div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:11px 14px;display:flex;justify-content:space-between;align-items:center}
.scorebar span{color:var(--muted);font-size:.88rem;font-weight:700}
.scorebar strong{color:var(--ink);font-size:1.1rem}
.board-wrap{background:linear-gradient(145deg,#dff1ff,#fff9ed);border:1px solid #cfdfeb;border-radius:28px;padding:16px 14px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.board-wrap:before,.board-wrap:after{content:"";position:absolute;border-radius:50%;filter:blur(2px);opacity:.22}
.board-wrap:before{width:150px;height:150px;background:#ffbe21;left:-55px;top:-65px}
.board-wrap:after{width:190px;height:190px;background:#7b45b5;right:-80px;bottom:-100px}
.game-board{position:relative;z-index:1;display:grid;grid-template-columns:repeat(var(--columns,6), minmax(86px, 112px));justify-content:center;gap:10px;perspective:1000px}
.memory-card{aspect-ratio:4/5;border:0;background:transparent;padding:0;cursor:pointer;position:relative;transform-style:preserve-3d;transition:transform .52s cubic-bezier(.2,.72,.2,1);border-radius:16px}
.memory-card.is-flipped,.memory-card.is-matched{transform:rotateY(180deg)}
.memory-card.is-matched{animation:matchPulse .55s ease}
.card-face{position:absolute;inset:0;border-radius:16px;backface-visibility:hidden;overflow:hidden;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(22,56,95,.14);border:2px solid rgba(255,255,255,.92)}
.card-back{background:var(--purple)}
.card-back:before{content:"";position:absolute;inset:10px;border:2px solid rgba(255,255,255,.45);border-radius:11px}
.card-front{background:#fff;transform:rotateY(180deg);padding:8px}
.card-front.picture img{width:90%;height:90%;object-fit:contain}
.card-front.word{padding:8px;background:linear-gradient(145deg,#fff,#fffaf2)}
.card-front.word span{font-weight:900;color:var(--ink);font-size:clamp(.92rem,1.8vw,1.28rem);line-height:1.05;overflow-wrap:anywhere}
.memory-card.is-wrong{animation:shake .38s ease}
.memory-card:focus-visible{outline:4px solid var(--yellow);outline-offset:3px}
.helper{text-align:center;color:var(--muted);font-weight:700;font-size:.96rem;margin:12px 0 0}
.learn-dialog,.win-dialog{border:0;border-radius:28px;padding:0;max-width:min(800px,calc(100% - 24px));width:100%;box-shadow:0 26px 80px rgba(0,0,0,.26);overflow:hidden}
.learn-dialog::backdrop,.win-dialog::backdrop{background:rgba(10,29,50,.62);backdrop-filter:blur(5px)}
.learn-dialog form{padding:28px;position:relative}.dialog-close{position:absolute;right:16px;top:12px;border:0;background:var(--soft);width:40px;height:40px;border-radius:50%;font-size:1.6rem;cursor:pointer}
.learn-dialog h2,.win-dialog h2{color:var(--ink);font-size:2rem;margin:4px 0 20px}
.word-list{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-bottom:22px}
.word-item{background:var(--soft);border:1px solid var(--line);border-radius:16px;padding:10px;text-align:center}
.word-item img{width:100%;aspect-ratio:1/1;object-fit:contain}.word-item strong{color:var(--ink)}.wide{width:100%}
.win-dialog{background:linear-gradient(145deg,#fff,#fff7df);text-align:center;position:relative}.win-content{padding:34px;position:relative;z-index:2}.win-cat{font-size:4rem;animation:bob .8s ease infinite alternate}.win-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.confetti{position:absolute;inset:0;overflow:hidden;pointer-events:none}.confetti i{position:absolute;width:10px;height:18px;border-radius:3px;top:-30px;animation:fall 2.4s linear infinite}.confetti i:nth-child(5n+1){background:#ef4056}.confetti i:nth-child(5n+2){background:#ffbe21}.confetti i:nth-child(5n+3){background:#55a85a}.confetti i:nth-child(5n+4){background:#2282d0}.confetti i:nth-child(5n){background:#7b45b5}
footer{text-align:center;color:var(--muted);padding:0 20px 24px}
@keyframes matchPulse{50%{transform:rotateY(180deg) scale(1.07)}}
@keyframes shake{25%{transform:rotateY(180deg) translateX(-5px)}75%{transform:rotateY(180deg) translateX(5px)}}
@keyframes bob{to{transform:translateY(-9px) rotate(4deg)}}
@keyframes fall{to{transform:translateY(620px) rotate(720deg)}}
@media(max-width:920px){.game-board{grid-template-columns:repeat(var(--columns,4), minmax(84px, 100px))}}
@media(max-width:760px){.intro{grid-template-columns:1fr}.mascot-note{display:none}.control-panel{align-items:flex-start;flex-direction:column}.scorebar{grid-template-columns:repeat(2,1fr)}.game-board{grid-template-columns:repeat(var(--mobile-columns,3),minmax(0,1fr));justify-content:stretch;gap:8px}.word-list{grid-template-columns:repeat(2,1fr)}.home-link{font-size:.88rem}.brand span{display:none}}
@media(max-width:380px){.app-shell{width:calc(100% - 16px)}.board-wrap{padding:8px}.game-board{gap:6px}.scorebar>div{padding:9px 10px}.card-front.word span{font-size:.82rem}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}
.top-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
@media(max-width:560px){.top-links{gap:9px}.top-links .home-link:last-child{display:none}}

/* v12: deliberately compact desktop layout and solid card backs */
@media (min-width: 921px){
  .app-shell{padding-top:12px}
  .intro{grid-template-columns:1fr; margin-bottom:12px}
  .intro h1{font-size:clamp(2rem,3.4vw,3rem)}
  .lead{margin-top:.35rem}
  .mascot-note{display:none}
  .control-panel{padding:9px 12px}
  .scorebar{margin:10px 0; gap:8px}
  .scorebar>div{padding:8px 12px}
  .board-wrap{padding:12px}
  .game-board{
    grid-template-columns:repeat(var(--columns,6), minmax(0, 82px));
    gap:8px;
    justify-content:center;
  }
  .memory-card{border-radius:13px}
  .card-face{border-radius:13px}
  .card-front.word span{font-size:.92rem}
  .helper{margin-top:8px}
}

.card-back{
  background:#6f46b7 !important;
  background-image:none !important;
}
.card-back:before{display:none !important}
.card-back img{display:none !important}

/* v103: match the main EDUKASS wordmark. */
.brand .brand-name b{color:#44bcb2;text-shadow:0 1px 0 var(--ink)}
.brand .brand-name{color:var(--ink)}

/* v113: keep the complete EDUKASS lockup visible in the game header. */
.topbar .brand{
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:0;
  line-height:1;
}
.topbar .brand img{
  width:44px;
  height:44px;
  object-fit:contain;
}
.topbar .brand .brand-name{
  display:block;
  margin-top:-1px;
  font-size:.7rem;
  line-height:1;
  white-space:nowrap;
}
@media(max-width:760px){
  .topbar .brand .brand-name{display:block}
}