*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root,[data-theme=light]{--color-bg:#f0f4ff;--color-card:#fff;--color-card-border:#e2e8f0;--color-primary:#6366f1;--color-primary-light:#818cf8;--color-success:#22c55e;--color-error:#ef4444;--color-text:#1e293b;--color-text-light:#64748b;--radius:16px;--shadow:0 4px 12px #00000014;--shadow-lg:0 8px 24px #0000001f}[data-theme=dark]{--color-bg:#1a1a2e;--color-card:#16213e;--color-card-border:#2a2a4a;--color-primary:#818cf8;--color-primary-light:#a5b4fc;--color-success:#4ade80;--color-error:#f87171;--color-text:#e4e4e7;--color-text-light:#a1a1aa;--shadow:0 4px 12px #0000004d;--shadow-lg:0 8px 24px #0006}html{-webkit-text-size-adjust:100%;overscroll-behavior:none;font-size:18px}body{background:var(--color-bg);color:var(--color-text);-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none;overscroll-behavior:none;min-height:100dvh;font-family:Nunito,Segoe UI,system-ui,-apple-system,sans-serif;position:fixed;inset:0;overflow:hidden}#root{-webkit-overflow-scrolling:touch;width:100%;height:100%;overflow:hidden auto}.app{max-width:900px;padding:1rem;padding-top:calc(1rem + env(safe-area-inset-top,0px));padding-bottom:calc(1rem + env(safe-area-inset-bottom,0px));padding-left:calc(1rem + env(safe-area-inset-left,0px));padding-right:calc(1rem + env(safe-area-inset-right,0px));flex-direction:column;min-height:100dvh;margin:0 auto;display:flex}.icon{vertical-align:middle;flex-shrink:0;display:inline-block}.category-list{flex-direction:column;align-items:center;gap:1.5rem;padding-top:2rem;display:flex}.title{color:var(--color-primary);text-align:center;font-size:2.5rem;font-weight:800}.subtitle{color:var(--color-text-light);font-size:1.3rem}.categories-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;width:100%;max-width:600px;display:grid}.category-card{background:var(--color-card);border:3px solid var(--color-primary-light);border-radius:var(--radius);box-shadow:var(--shadow);flex-direction:column;transition:transform .15s,box-shadow .15s;display:flex;overflow:hidden}.category-illustration{object-fit:cover;object-position:center;background:linear-gradient(135deg, var(--color-bg) 0%, var(--color-card) 100%);width:100%;height:100px}.category-icon{color:var(--color-primary)}.category-card:hover{box-shadow:var(--shadow-lg);transform:scale(1.03)}.category-play-btn{cursor:pointer;background:0 0;border:none;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:.5rem;min-width:48px;min-height:140px;padding:2rem 1.5rem;font-family:inherit;display:flex}.category-words-btn{background:var(--color-primary-light);color:#fff;cursor:pointer;border:none;justify-content:center;align-items:center;gap:.35rem;width:100%;min-height:48px;padding:.75rem;font-family:inherit;font-size:.9rem;font-weight:700;transition:background .15s;display:flex}.category-words-btn:hover{background:var(--color-primary)}.category-name{color:var(--color-primary);font-size:1.5rem;font-weight:700}.category-count{color:var(--color-text-light);font-size:.9rem}.match-round{flex-direction:column;flex:1;gap:1.5rem;display:flex}.round-header{justify-content:space-between;align-items:center;padding:.5rem 0;display:flex}.back-button{color:var(--color-primary);cursor:pointer;background:0 0;border:none;align-items:center;gap:.25rem;min-width:48px;min-height:48px;padding:.5rem;font-family:inherit;font-size:1.2rem;font-weight:700;display:inline-flex}.category-label{color:var(--color-text-light);font-size:1rem;font-weight:600}.progress{color:var(--color-primary);font-size:1rem;font-weight:600}.word-display{background:var(--color-card);border-radius:var(--radius);box-shadow:var(--shadow);justify-content:center;align-items:center;padding:2rem;display:flex}.word-text{letter-spacing:.1em;color:var(--color-text);font-size:3rem;font-weight:800;transition:color .3s,transform .3s}.word-text.correct{color:var(--color-success);text-shadow:0 2px 8px #22c55e4d;transform:scale(1.1)}.image-grid{flex:1;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;display:grid}.image-card{background:var(--color-card);border:3px solid var(--color-card-border);border-radius:var(--radius);box-shadow:var(--shadow);cursor:pointer;justify-content:center;align-items:center;min-width:48px;min-height:180px;padding:1rem;font-family:inherit;transition:transform .15s,border-color .15s;display:flex;overflow:hidden}.image-card:hover{transform:scale(1.03)}.image-card:disabled{cursor:default}.image-card.correct{border-color:var(--color-success);box-shadow:0 0 0 4px #22c55e33, var(--shadow);background:#22c55e1a;animation:.5s correctPop}.image-card.shake{border-color:var(--color-error);animation:.4s shake;box-shadow:0 0 0 4px #ef444426}.card-image{object-fit:contain;max-width:100%;max-height:120px}.color-circle{border:none;border-radius:50%;width:100px;height:100px}.color-circle-white{border:3px solid var(--color-card-border);flex-shrink:0}.fallback{color:var(--color-text-light);font-size:1.3rem;font-weight:700}.quiz-picker{flex-direction:column;flex:1;align-items:center;gap:1.5rem;padding-top:2rem;display:flex}.picker-title{color:var(--color-primary);font-size:2.5rem;font-weight:800}.picker-subtitle{color:var(--color-text-light);font-size:1.3rem}.picker-options{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.picker-button{background:var(--color-card);border:3px solid var(--color-primary-light);border-radius:var(--radius);width:130px;height:130px;box-shadow:var(--shadow);color:var(--color-primary);cursor:pointer;justify-content:center;align-items:center;font-family:inherit;font-size:2.5rem;font-weight:800;transition:transform .15s,box-shadow .15s;display:flex}.picker-button:hover:not(:disabled){box-shadow:var(--shadow-lg);transform:scale(1.08)}.picker-button:disabled{opacity:.3;cursor:not-allowed}.round-complete{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:2rem;padding:2rem;display:flex}.celebration{flex-direction:column;align-items:center;gap:1rem;display:flex}.celebration-icon{filter:drop-shadow(0 4px 8px #fbbf2466);animation:1s infinite bounce}.party-icon{vertical-align:-3px}.stars{font-size:3rem;animation:1s infinite bounce}.great-job{color:var(--color-success);font-size:3rem;font-weight:800}.complete-message{color:var(--color-text-light);font-size:1.3rem}.complete-actions{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.play-again-button,.home-button{border-radius:var(--radius);cursor:pointer;border:none;align-items:center;gap:.4rem;min-width:48px;min-height:48px;padding:1rem 2rem;font-family:inherit;font-size:1.2rem;font-weight:700;transition:transform .15s;display:inline-flex}.play-again-button{background:var(--color-primary);color:#fff}.home-button{background:var(--color-card);color:var(--color-primary);border:2px solid var(--color-primary)}.play-again-button:hover,.home-button:hover{transform:scale(1.05)}.loading{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.skeleton-card{background:linear-gradient(90deg, var(--color-card-border) 25%, var(--color-card) 50%, var(--color-card-border) 75%);border-radius:var(--radius);background-size:200% 100%;width:200px;height:120px;animation:1.5s infinite shimmer}.error-text{color:var(--color-error);text-align:center;font-size:1.3rem}.retry-button{background:var(--color-primary);color:#fff;border-radius:var(--radius);cursor:pointer;border:none;min-width:48px;min-height:48px;padding:1rem 2rem;font-family:inherit;font-size:1.2rem;font-weight:700}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}40%{transform:translate(8px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}@keyframes bounce{0%,to{transform:scale(1)}50%{transform:scale(1.15)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes correctPop{0%{transform:scale(1)}30%{transform:scale(1.12)}60%{transform:scale(.95)}to{transform:scale(1)}}@keyframes popIn{0%{opacity:0;transform:scale(.8)}60%{transform:scale(1.05)}to{opacity:1;transform:scale(1)}}.profile-picker{flex-direction:column;flex:1;align-items:center;gap:2rem;padding-top:3rem;display:flex}.profiles-grid{flex-wrap:wrap;justify-content:center;gap:1.5rem;display:flex}.profile-card{background:var(--color-card);border:3px solid var(--color-card-border);border-radius:var(--radius);box-shadow:var(--shadow);cursor:pointer;flex-direction:column;align-items:center;gap:.75rem;min-width:140px;min-height:160px;padding:2rem 1.5rem;font-family:inherit;transition:transform .15s;display:flex}.profile-card:hover{transform:scale(1.05)}.profile-avatar{color:#fff;border-radius:50%;justify-content:center;align-items:center;width:90px;height:90px;font-size:2rem;font-weight:800;display:flex}.profile-name{color:var(--color-text);font-size:1.3rem;font-weight:700}.settings-link{background:var(--color-card);border:2px solid var(--color-primary);color:var(--color-primary);cursor:pointer;border-radius:var(--radius);min-height:48px;padding:.75rem 2rem;font-family:inherit;font-size:1rem;font-weight:600;transition:transform .15s}.settings-link:hover{transform:scale(1.05)}.profile-indicator{align-items:center;gap:.5rem;display:flex}.profile-label{color:var(--color-text-light);font-size:.9rem;font-weight:600}.profile-avatar-small{color:#fff;width:36px;height:36px;box-shadow:var(--shadow);border-radius:50%;justify-content:center;align-items:center;font-size:.9rem;font-weight:700;display:flex}.app-header{justify-content:space-between;align-items:center;padding:.25rem 0;display:flex}.theme-toggle,.settings-gear{cursor:pointer;min-width:48px;min-height:48px;color:var(--color-text-light);opacity:.6;background:0 0;border:none;justify-content:center;align-items:center;padding:.5rem;transition:opacity .15s;display:flex}.theme-toggle:hover,.settings-gear:hover{opacity:1}.pin-screen{flex-direction:column;flex:1;align-items:center;gap:1.5rem;padding-top:3rem;display:flex}.pin-title{color:var(--color-primary);font-size:1.8rem;font-weight:800}.pin-subtitle{color:var(--color-text-light);font-size:1rem}.pin-dots{gap:1rem;display:flex}.pin-dot{border:2px solid var(--color-primary);background:0 0;border-radius:50%;width:20px;height:20px;transition:background .15s}.pin-dot.filled{background:var(--color-primary)}.pin-pad{grid-template-columns:repeat(3,1fr);gap:.75rem;max-width:280px;display:grid}.pin-key{border:2px solid var(--color-card-border);background:var(--color-card);width:75px;height:75px;color:var(--color-text);cursor:pointer;border-radius:50%;justify-content:center;align-items:center;font-family:inherit;font-size:1.5rem;font-weight:700;transition:transform .1s;display:flex}.pin-key:active{transform:scale(.95)}.pin-key.empty{visibility:hidden}.pin-error{color:var(--color-error);font-weight:600}.pin-back{background:var(--color-card);border:2px solid var(--color-card-border);color:var(--color-text);cursor:pointer;border-radius:var(--radius);min-width:120px;min-height:48px;padding:.75rem 2rem;font-family:inherit;font-size:1.1rem;font-weight:600;transition:transform .15s}.pin-back:hover{transform:scale(1.05)}.profile-manage-screen{flex-direction:column;flex:1;align-items:center;gap:1.5rem;padding-top:2rem;display:flex}.managed-profiles{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.managed-profile-item{background:var(--color-card);border-radius:var(--radius);box-shadow:var(--shadow);flex-direction:column;align-items:center;gap:.75rem;min-width:130px;padding:1.5rem;display:flex}.profile-name-input{border:2px solid var(--color-card-border);text-align:center;background:var(--color-card);width:250px;color:var(--color-text);border-radius:12px;padding:.75rem 1rem;font-family:inherit;font-size:1.2rem}.profile-name-input:focus{border-color:var(--color-primary);outline:none}.color-picker{flex-wrap:wrap;justify-content:center;gap:.75rem;display:flex}.color-dot{cursor:pointer;border:3px solid #0000;border-radius:50%;width:48px;height:48px;transition:transform .15s}.color-dot.selected{border-color:var(--color-text);transform:scale(1.15)}.managed-profile-item.clickable{cursor:pointer;border:none;font-family:inherit;transition:transform .15s}.managed-profile-item.clickable:hover{transform:scale(1.05)}.delete-button{background:var(--color-error);color:#fff;border-radius:var(--radius);cursor:pointer;border:none;min-height:48px;padding:.75rem 2rem;font-family:inherit;font-size:1rem;font-weight:700;transition:transform .15s}.delete-button:hover{transform:scale(1.05)}.delete-confirm{flex-direction:column;align-items:center;gap:.75rem;display:flex}.delete-warning{color:var(--color-error);text-align:center;font-size:1rem;font-weight:600}.delete-actions{gap:.75rem;display:flex}.word-list{flex-direction:column;gap:1rem;display:flex}.word-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:.75rem;display:grid}.word-card{background:var(--color-card);border-radius:var(--radius);box-shadow:var(--shadow);flex-direction:column;align-items:center;gap:.25rem;padding:.75rem;display:flex}.word-card-image{object-fit:contain;width:60px;height:60px}.word-card-text{color:var(--color-text);font-size:.8rem;font-weight:700}.stars-display{gap:2px;display:inline-flex}.star-filled{filter:none}.star-empty{color:var(--color-card-border);opacity:.5}.round-word-summary{flex-wrap:wrap;justify-content:center;gap:.5rem;max-width:500px;display:flex}.round-word-item{background:var(--color-card);box-shadow:var(--shadow);border-radius:8px;align-items:center;gap:.5rem;padding:.5rem .75rem;display:flex}.round-word-text{font-size:.9rem;font-weight:600}.mastery-message{color:var(--color-success);font-size:1.2rem;font-weight:700}@keyframes mastery-pulse{0%,to{transform:scale(1)}50%{transform:scale(1.2)}}.mastery-burst{animation:.6s 2 mastery-pulse}@media (width>=768px){html{font-size:20px}.app{padding:1.5rem;padding-top:calc(1.5rem + env(safe-area-inset-top,0px));padding-bottom:calc(1.5rem + env(safe-area-inset-bottom,0px))}.word-text{font-size:4rem}.categories-grid{grid-template-columns:repeat(2,1fr);gap:1.25rem}.category-illustration{height:130px}.image-grid{grid-template-columns:repeat(3,1fr)}.image-card{min-height:200px}.word-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.picker-button{width:160px;height:160px;font-size:3rem}.profile-avatar{width:110px;height:110px;font-size:2.5rem}.pin-key{width:85px;height:85px;font-size:1.8rem}.celebration-icon{width:80px;height:80px}.great-job{font-size:3.5rem}}@media (width>=1024px){html{font-size:22px}.app{max-width:1100px}.word-text{font-size:4.5rem}.categories-grid{grid-template-columns:repeat(3,1fr);gap:1.5rem}.category-illustration{height:150px}.image-grid{grid-template-columns:repeat(4,1fr)}.image-card{min-height:220px}.word-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}.picker-button{width:180px;height:180px;font-size:3.5rem}}