*{box-sizing:border-box}
:root{
  color-scheme:dark;--bg:#07121c;--panel:#102a43;--panel2:#173f5f;--text:#f6fbff;
  --muted:#aec1cf;--border:rgba(255,255,255,.13);--accent:#ffb703;--good:#54d98c;--bad:#ff7272
}
html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:linear-gradient(180deg,#07121c,#0d2233);color:var(--text)}
body{padding:env(safe-area-inset-top) 12px env(safe-area-inset-bottom)}
a{color:inherit}.shell,.game-shell{width:min(1100px,100%);margin:auto}.game-shell{width:min(900px,100%)}
.topnav{display:flex;gap:8px;align-items:center;justify-content:space-between;margin:8px 0 14px;flex-wrap:wrap}
.home-btn,.btn,.choice,.filter-btn,.small-btn{min-height:46px;border:1px solid var(--border);border-radius:12px;background:var(--panel);color:var(--text);padding:10px 14px;font-weight:800;cursor:pointer;text-decoration:none}
.btn.primary{background:var(--accent);color:#17202a;border-color:transparent}.btn:disabled,.choice:disabled{opacity:.5;cursor:not-allowed}
header h1{font-size:clamp(2rem,7vw,4.2rem);line-height:.98;margin:.15rem 0 .5rem}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.76rem;color:#85c7ed;font-weight:900}.lead,header p{color:var(--muted)}
.panel,.stat,.card,.controls label{border:1px solid var(--border);border-radius:18px;background:rgba(16,42,67,.86)}
.panel{padding:18px;margin:12px 0}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:12px 0}.stat{text-align:center;padding:10px}.stat span{display:block;color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.06em}.stat strong{display:block;font-size:1.35rem;margin-top:3px}
.controls{display:flex;gap:8px;align-items:end;flex-wrap:wrap;margin:10px 0}.controls label{display:flex;flex-direction:column;gap:5px;padding:8px 10px;color:var(--muted);font-size:.82rem}.controls select,.controls input{min-height:42px;border-radius:9px;border:1px solid var(--border);background:#0e2639;color:var(--text);padding:0 10px;font-size:1rem}
.choices{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:16px 0}.choice{font-size:1.05rem;min-width:110px}.message{min-height:28px;text-align:center;font-weight:900;color:var(--accent)}
.big{font-size:clamp(3rem,14vw,7rem);text-align:center}.prompt{text-align:center;font-size:1.35rem;font-weight:900;margin:10px}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.card{padding:18px;text-decoration:none;min-height:210px;display:flex;flex-direction:column}.card .emoji{font-size:3rem}.card h2{margin:.55rem 0 .35rem}.card p{color:var(--muted);line-height:1.45;flex:1}.card .go{font-weight:900;color:#ffd166}.badge{display:inline-block;border:1px solid var(--border);border-radius:999px;padding:4px 8px;font-size:.72rem;color:var(--muted);margin-right:5px}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 16px}.filter-btn.active{outline:2px solid var(--accent)}
.arena{position:relative;overflow:hidden;min-height:500px;border:1px solid var(--border);border-radius:20px;background:linear-gradient(#163a57,#2d7891 58%,#486b38 59%,#28462d);touch-action:manipulation;user-select:none}
.target{position:absolute;border:0;background:transparent;display:grid;place-items:center;min-width:50px;min-height:50px;cursor:pointer;touch-action:manipulation}.target.hit{animation:pop .18s ease-out forwards}@keyframes pop{to{transform:scale(.15);opacity:0}}
.board{display:grid;gap:8px;margin:14px auto;max-width:620px}.memory-card,.puzzle-cell,.match-cell{aspect-ratio:1;border:1px solid var(--border);border-radius:12px;background:var(--panel2);color:var(--text);display:grid;place-items:center;font-size:clamp(1.5rem,5vw,2.7rem);font-weight:900;cursor:pointer;min-width:0}
.memory-card.revealed,.memory-card.matched{background:#234f3a}.memory-card.matched{opacity:.65}
.word-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:4px;max-width:650px;margin:auto}.word-cell{aspect-ratio:1;border:1px solid var(--border);border-radius:7px;background:var(--panel);display:grid;place-items:center;font-weight:900;cursor:pointer;user-select:none}.word-cell.selected{background:#6a4b13}.word-cell.found{background:#215c42}
.sudoku{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;max-width:420px;margin:auto}.puzzle-cell input{width:100%;height:100%;border:0;background:transparent;color:var(--text);font-size:1.7rem;text-align:center}
.match-board{display:grid;grid-template-columns:repeat(6,1fr);gap:5px;max-width:620px;margin:auto}.match-cell{font-size:2rem}
.space-arena{position:relative;overflow:hidden;min-height:520px;border:1px solid var(--border);border-radius:20px;background:radial-gradient(circle at 50% 20%,#132f57,#050b18 70%);touch-action:manipulation;user-select:none}.ship{position:absolute;left:50%;bottom:15px;transform:translateX(-50%);font-size:4.2rem}.enemy{position:absolute;border:0;background:transparent;font-size:3rem;cursor:pointer}.laser{position:absolute;width:4px;background:#ffec70;border-radius:9px;pointer-events:none;animation:laser .18s linear forwards}@keyframes laser{from{height:0;opacity:1}to{height:140px;opacity:0}}
.deck{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.playing-card{width:82px;height:116px;border-radius:10px;background:#f9fbfd;color:#17202a;display:flex;flex-direction:column;justify-content:space-between;padding:8px;font-weight:900;border:2px solid #d7e0e6;cursor:pointer}.playing-card.red{color:#c92d39}
.native{font-size:clamp(3rem,12vw,6rem);font-weight:900;text-align:center}.roman,.meaning{text-align:center}.roman{color:#d8a7ff;font-size:1.35rem}.meaning{font-size:1.2rem;margin:.5rem}
.prizes{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.prize{border:1px solid var(--border);border-radius:14px;background:var(--panel);padding:10px;text-align:center}.prize .pemoji{font-size:2rem}
@media(max-width:760px){.cards{grid-template-columns:1fr 1fr}.stats{grid-template-columns:repeat(2,1fr)}}@media(max-width:520px){.cards{grid-template-columns:1fr}.match-board{grid-template-columns:repeat(5,1fr)}.prizes{grid-template-columns:repeat(2,1fr)}}
@media(prefers-reduced-motion:reduce){*{animation-duration:.001ms!important}}


/* v2.1 visual game hub */
.shell{padding:10px 4px 24px}
.shell header{padding:12px 0 6px}
.shell header h1{font-size:clamp(2.6rem,7vw,5.2rem);margin:.1rem 0 .65rem;letter-spacing:-.04em}
.shell .lead{font-size:clamp(1rem,2vw,1.25rem);max-width:900px}
.library-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:12px 0 4px}
.library-count{margin-left:auto;display:flex;align-items:center;gap:10px;border:1px solid var(--border);background:rgba(16,42,67,.72);border-radius:16px;padding:10px 14px;color:var(--muted)}
.library-count strong{color:var(--text)}
.visual-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.visual-card{display:flex;flex-direction:column;overflow:hidden;min-width:0;border:1px solid rgba(101,188,255,.22);border-radius:20px;background:linear-gradient(180deg,#0e3150,#0b2740);text-decoration:none;color:var(--text)}
.visual-card .art{height:160px;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;font-size:4.6rem}
.visual-card .art::after{content:"";position:absolute;inset:auto 0 0;height:42%;background:linear-gradient(transparent,rgba(0,0,0,.18))}
.visual-card .art span{position:relative;z-index:2;filter:drop-shadow(0 8px 8px rgba(0,0,0,.2))}
.visual-card .body{display:flex;flex-direction:column;gap:8px;padding:16px;min-height:210px}
.visual-card h2{font-size:1.55rem;line-height:1.05;margin:0}
.visual-card p{margin:0;color:#c6d7e4;line-height:1.42;flex:1}
.visual-card .row{display:flex;justify-content:space-between;gap:10px;align-items:center}
.play-pill{border:0;border-radius:12px;background:#1798ff;color:white;font-weight:900;padding:10px 16px;white-space:nowrap}
.cat-pill{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:6px 10px;font-size:.78rem;font-weight:900}
.cat-Action{background:#ef3e7b;color:white}.cat-Learning{background:#25c76f;color:white}.cat-Brain{background:#9a45e8;color:white}.cat-Relax{background:#f43f82;color:white}
.art-touch{background:linear-gradient(#5ac8fa,#79d996 58%,#5a9b4e 59%)}
.art-learning{background:linear-gradient(#85d8ff,#8ed36f)}
.art-language{background:linear-gradient(#7bd6ff,#4963cf)}
.art-memory{background:linear-gradient(135deg,#8d4ce6,#3d2380)}
.art-math{background:linear-gradient(#5cc6f0,#56b86c)}
.art-scramble{background:linear-gradient(#4b953a,#1f6230)}
.art-world{background:linear-gradient(#5cc7ff,#3ea0d9)}
.art-quiz{background:radial-gradient(circle at 50% 35%,#ffd85a,#176ab3 42%,#0f3e74)}
.art-number{background:linear-gradient(#e79c4f,#ba642f)}
.art-match{background:linear-gradient(#33106f,#6d1b96)}
.art-solitaire{background:linear-gradient(#0a8a3f,#075a2b)}
.art-wordsearch{background:linear-gradient(#e68a45,#b54c30)}
.art-space{background:radial-gradient(circle at 50% 30%,#143d87,#081631 62%,#040811)}
.visual-card:hover{transform:translateY(-2px);border-color:rgba(103,201,255,.5)}
.visual-card:hover .play-pill{filter:brightness(1.08)}
@media(max-width:900px){.visual-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.library-count{margin-left:0}}
@media(max-width:560px){.visual-cards{grid-template-columns:1fr}.visual-card .art{height:135px}.visual-card .body{min-height:0}}

/* v2.2 gameplay reliability / visibility */
.play-panel{padding:20px;margin:14px 0;border:1px solid var(--border);border-radius:20px;background:rgba(16,42,67,.92)}
.game-start{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:12px 0}
.answer-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:16px 0}
.answer-btn{min-height:54px;min-width:100px;border:1px solid var(--border);border-radius:14px;background:#173f5f;color:var(--text);font-size:1.05rem;font-weight:900;padding:10px 16px;cursor:pointer}
.answer-btn:active{transform:scale(.98)}
.word-display{text-align:center;font-size:clamp(2.4rem,9vw,5.8rem);font-weight:900;letter-spacing:.06em;margin:12px 0}
.subprompt{text-align:center;color:var(--muted);font-size:1rem}
.game-note{text-align:center;color:var(--muted);font-size:.9rem;margin-top:8px}

.hidden{display:none!important}
.notice{border:1px solid var(--border);border-radius:14px;background:rgba(16,42,67,.8);padding:12px 14px;color:var(--muted)}
.home-btn{display:inline-flex;align-items:center;justify-content:center}