*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0a0a0f;--neon:#00d4ff;--purple:#7b2fff;--text:#fff;
  --muted:#8b9cb3;--gold:#ffd700;--green:#00ff88;--red:#ff4466;
  --card:rgba(255,255,255,0.04);--border:rgba(0,212,255,0.2);
  --radius:14px;--radius-lg:22px;
}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(circle at 15% 20%,rgba(123,47,255,0.12) 0%,transparent 45%),radial-gradient(circle at 85% 75%,rgba(0,212,255,0.08) 0%,transparent 40%);pointer-events:none;z-index:-1}
a{color:inherit;text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:0 1.25rem}

/* Header */
.app-header{position:sticky;top:0;z-index:100;background:rgba(10,10,15,0.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.app-nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:1rem}
.logo{font-family:'Orbitron',sans-serif;font-weight:800;font-size:0.95rem;display:flex;align-items:center;gap:0.5rem}
.logo-icon{font-size:1.4rem}
.logo span{color:var(--neon)}
.nav-links{display:flex;gap:0.25rem;list-style:none;align-items:center}
.nav-links a{padding:0.4rem 0.75rem;font-size:0.8rem;font-weight:600;color:var(--muted);border-radius:8px;transition:0.2s}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(0,212,255,0.12)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer}
.nav-toggle span{width:22px;height:2px;background:var(--text)}

.hud{display:flex;align-items:center;gap:0.75rem;font-size:0.75rem}
.hud-stat{display:flex;align-items:center;gap:0.35rem;background:var(--card);border:1px solid var(--border);border-radius:999px;padding:0.3rem 0.75rem}
.hud-stat .icon{font-size:0.9rem}
.hud-xp-wrap{min-width:90px}
.hud-xp-bar{height:4px;background:rgba(255,255,255,0.1);border-radius:999px;margin-top:3px;overflow:hidden}
.hud-xp-fill{height:100%;background:linear-gradient(90deg,var(--purple),var(--neon));transition:width 0.4s}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:0.4rem;padding:0.7rem 1.4rem;font-size:0.88rem;font-weight:700;border:none;border-radius:var(--radius);cursor:pointer;font-family:inherit;transition:0.2s}
.btn-neon{background:linear-gradient(135deg,var(--neon),#0099cc);color:var(--bg)}
.btn-neon:hover{box-shadow:0 0 24px rgba(0,212,255,0.4);transform:translateY(-2px)}
.btn-purple{background:linear-gradient(135deg,var(--purple),#5a1fcc);color:var(--text)}
.btn-outline{background:transparent;border:2px solid var(--neon);color:var(--neon)}
.btn-sm{padding:0.45rem 1rem;font-size:0.8rem}
.btn:disabled{opacity:0.4;cursor:not-allowed;transform:none!important}

/* World Map */
.world-hero{text-align:center;padding:2.5rem 0 1.5rem}
.world-hero h1{font-family:'Orbitron',sans-serif;font-size:clamp(1.6rem,4vw,2.4rem);margin-bottom:0.5rem;background:linear-gradient(135deg,var(--text),var(--neon));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.world-hero p{color:var(--muted);font-size:0.95rem}

.map-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1.25rem;margin:2rem 0 3rem}
.stage-card{background:var(--card);border:2px solid var(--border);border-radius:var(--radius-lg);padding:1.75rem 1.25rem;text-align:center;transition:0.3s;position:relative;overflow:hidden}
.stage-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--purple),var(--neon));opacity:0;transition:0.3s}
.stage-card.unlocked:hover{transform:translateY(-6px);border-color:var(--neon);box-shadow:0 0 30px rgba(0,212,255,0.15)}
.stage-card.unlocked:hover::before{opacity:1}
.stage-card.locked{opacity:0.45;cursor:not-allowed}
.stage-card.cleared{border-color:var(--green)}
.stage-card .stage-icon{font-size:2.5rem;margin-bottom:0.75rem}
.stage-card h3{font-family:'Orbitron',sans-serif;font-size:0.85rem;margin-bottom:0.35rem}
.stage-card .stage-num{font-size:0.7rem;color:var(--muted);margin-bottom:0.5rem}
.stage-card .reward{font-size:0.75rem;color:var(--gold)}
.lock-overlay{position:absolute;inset:0;background:rgba(10,10,15,0.7);display:flex;align-items:center;justify-content:center;font-size:2rem}
.check-badge{position:absolute;top:0.75rem;right:0.75rem;color:var(--green);font-size:1.1rem}

/* Game panels */
.game-page{padding:1.5rem 0 3rem}
.game-header{text-align:center;margin-bottom:2rem}
.game-header h1{font-family:'Orbitron',sans-serif;font-size:clamp(1.3rem,3vw,1.8rem);margin-bottom:0.35rem}
.game-header p{color:var(--muted);font-size:0.9rem}
.game-panel{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:2rem;max-width:720px;margin:0 auto}

.timer-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;font-size:0.85rem}
.timer{font-family:'Orbitron',sans-serif;color:var(--neon);font-size:1.1rem}
.timer.warning{color:var(--red);animation:pulse 0.5s infinite}
@keyframes pulse{50%{opacity:0.6}}

.round-info{text-align:center;color:var(--muted);font-size:0.85rem;margin-bottom:1.5rem}

/* Stage 1 Drag */
.kana-round{text-align:center}
.kana-word{font-size:2rem;margin:1rem 0;letter-spacing:0.15em}
.kana-meaning{color:var(--muted);font-size:0.9rem;margin-bottom:1.5rem}
.romaji-zones{display:flex;flex-wrap:wrap;gap:0.75rem;justify-content:center;margin-bottom:1.5rem}
.drop-slot{min-width:120px;min-height:50px;border:2px dashed var(--border);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-family:'Orbitron',sans-serif;color:var(--neon)}
.drop-slot.filled{border-style:solid;border-color:var(--green);background:rgba(0,255,136,0.08)}
.drop-slot.wrong{border-color:var(--red)}
.kana-pool{display:flex;flex-wrap:wrap;gap:0.5rem;justify-content:center}
.kana-chip{padding:0.6rem 1rem;background:rgba(123,47,255,0.2);border:2px solid var(--purple);border-radius:var(--radius);cursor:grab;font-size:0.95rem;user-select:none;transition:0.2s}
.kana-chip.dragging{opacity:0.5}
.kana-chip.used{opacity:0.3;pointer-events:none}

/* Stage 2 Memory */
.memory-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0.6rem;max-width:420px;margin:0 auto}
.mem-card{aspect-ratio:1;background:linear-gradient(135deg,var(--purple),#3d1a8a);border:2px solid rgba(123,47,255,0.4);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:0.85rem;text-align:center;padding:0.4rem;cursor:pointer;transition:0.3s;word-break:break-word}
.mem-card.flipped,.mem-card.matched{background:rgba(0,212,255,0.12);border-color:var(--neon)}
.mem-card .back{font-size:1.25rem}
.mem-card.flipped .back,.mem-card.matched .back{display:none}

/* Stage 3 Quiz */
.quiz-q{font-size:1.1rem;font-weight:600;margin-bottom:0.5rem;text-align:center}
.quiz-jp{font-size:1.8rem;text-align:center;margin:1rem 0}
.quiz-furigana{text-align:center;color:var(--neon);font-size:0.9rem;margin-bottom:1.5rem}
.quiz-options{display:flex;flex-direction:column;gap:0.5rem}
.quiz-opt{padding:0.9rem 1.2rem;background:rgba(255,255,255,0.03);border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;text-align:left;font-family:inherit;font-size:0.95rem;color:var(--text);transition:0.2s}
.quiz-opt:hover{border-color:var(--neon)}
.quiz-opt.correct{border-color:var(--green);background:rgba(0,255,136,0.1)}
.quiz-opt.wrong{border-color:var(--red);background:rgba(255,68,102,0.1)}
.quiz-opt:disabled{cursor:default}
.quiz-feedback{text-align:center;margin-top:1rem;padding:1rem;border-radius:var(--radius);font-size:0.9rem}
.quiz-feedback.show{background:rgba(0,212,255,0.08);border:1px solid var(--border)}

/* Stage 4 Grammar */
.grammar-sentence{font-size:1.2rem;text-align:center;margin:1.5rem 0;line-height:2}
.grammar-blank{color:var(--neon);border-bottom:2px solid var(--neon);padding:0 0.5rem}
.grammar-explain{margin-top:1rem;padding:1rem;background:rgba(123,47,255,0.1);border-radius:var(--radius);font-size:0.85rem;color:var(--muted);display:none}
.grammar-explain.show{display:block}

/* Stage 5 Reading */
.reading-passage{background:rgba(0,212,255,0.05);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:2rem;font-size:1.05rem;line-height:2;letter-spacing:0.05em}
.reading-hint{font-size:0.8rem;color:var(--muted);margin-top:1rem;font-style:italic}

/* Results */
.result-screen{text-align:center;padding:2rem}
.result-screen .big{font-family:'Orbitron',sans-serif;font-size:3rem;color:var(--neon);margin:1rem 0}
.result-screen .coins{color:var(--gold);font-weight:700;font-size:1.1rem}

/* Shop */
.shop-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.25rem;margin:2rem 0}
.shop-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.75rem;text-align:center;transition:0.3s}
.shop-item:hover{border-color:var(--neon);box-shadow:0 0 20px rgba(0,212,255,0.1)}
.shop-item .item-icon{font-size:2.5rem;margin-bottom:0.75rem}
.shop-item h3{font-size:1rem;margin-bottom:0.35rem}
.shop-item .price{color:var(--gold);font-weight:700;margin:0.75rem 0}
.shop-item .owned{font-size:0.8rem;color:var(--muted)}
.inventory-bar{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-bottom:2rem;font-size:0.85rem}
.inv-item{background:var(--card);border:1px solid var(--border);border-radius:999px;padding:0.4rem 1rem}

/* Progress */
.progress-hero{text-align:center;padding:2rem 0}
.xp-progress-large{max-width:500px;margin:1.5rem auto;background:rgba(255,255,255,0.06);border-radius:999px;height:16px;overflow:hidden}
.xp-progress-large .fill{height:100%;background:linear-gradient(90deg,var(--purple),var(--neon));transition:width 0.5s}
.stages-progress{display:grid;grid-template-columns:repeat(5,1fr);gap:0.75rem;margin:2rem 0}
.stage-check{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;text-align:center;font-size:0.75rem}
.stage-check.done{border-color:var(--green);color:var(--green)}
.badges-row{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center;margin:2rem 0}
.badge-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-align:center;min-width:120px;opacity:0.35}
.badge-card.earned{opacity:1;border-color:var(--gold);box-shadow:0 0 16px rgba(255,215,0,0.15)}
.badge-card .emoji{font-size:2rem}
.badge-card .name{font-size:0.8rem;font-weight:700;margin-top:0.35rem}
.streak-cal{display:flex;gap:0.5rem;justify-content:center;margin:1.5rem 0}
.streak-day{width:40px;height:40px;border-radius:8px;background:var(--card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:0.65rem;flex-direction:column}
.streak-day.active{background:rgba(0,212,255,0.15);border-color:var(--neon);color:var(--neon)}
.streak-day .dow{font-size:0.55rem;color:var(--muted)}
.leaderboard{max-width:400px;margin:2rem auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}
.leaderboard h3{padding:1rem;text-align:center;font-family:'Orbitron',sans-serif;font-size:0.9rem;border-bottom:1px solid var(--border)}
.lb-row{display:flex;justify-content:space-between;padding:0.75rem 1.25rem;border-bottom:1px solid rgba(255,255,255,0.04);font-size:0.85rem}
.lb-row:first-of-type{color:var(--gold)}

/* Toast */
.toast{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%) translateY(80px);background:linear-gradient(135deg,var(--purple),#5a1fcc);padding:0.85rem 1.5rem;border-radius:999px;font-size:0.88rem;font-weight:600;z-index:300;transition:transform 0.35s;box-shadow:0 8px 32px rgba(0,0,0,0.4);white-space:nowrap;max-width:90vw;overflow:hidden;text-overflow:ellipsis}
.toast.show{transform:translateX(-50%) translateY(0)}

/* Footer */
.app-footer{border-top:1px solid var(--border);padding:1.75rem 0;text-align:center;font-size:0.78rem;color:var(--muted);margin-top:3rem}
.app-footer a{color:var(--neon)}

/* Utils */
.hidden{display:none!important}
.text-center{text-align:center}
.mt-1{margin-top:1rem}
.game-actions{display:flex;gap:0.75rem;justify-content:center;flex-wrap:wrap;margin-top:1.5rem}

@media(max-width:768px){
  .nav-toggle{display:flex}
  .nav-links{position:fixed;top:64px;left:0;right:0;flex-direction:column;background:var(--bg);padding:1rem;border-bottom:1px solid var(--border);transform:translateY(-120%);opacity:0;pointer-events:none;transition:0.25s}
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:all}
  .hud{font-size:0.65rem}
  .hud-xp-wrap{display:none}
  .memory-grid{grid-template-columns:repeat(3,1fr)}
  .stages-progress{grid-template-columns:repeat(2,1fr)}
}