:root{--bg: #0f0f1a;--surface: #1a1a2e;--surface2: #22223b;--border: #2d2d4e;--accent: #6c63ff;--accent-glow: rgba(108, 99, 255, .3);--success: #4ade80;--success-glow: rgba(74, 222, 128, .25);--error: #f87171;--error-glow: rgba(248, 113, 113, .25);--warning: #fbbf24;--text: #e2e8f0;--text-muted: #94a3b8;--text-dim: #64748b;--radius: 16px;--radius-sm: 10px;--nav-height: 72px;--safe-bottom: env(safe-area-inset-bottom, 0px)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body{height:100%;overflow:hidden}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}#root{height:100%;display:flex;flex-direction:column}.page{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding-bottom:calc(var(--nav-height) + var(--safe-bottom) + 8px);padding-top:8px;padding-left:16px;padding-right:16px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}button{cursor:pointer;border:none;border-radius:var(--radius-sm);font-size:16px;font-family:inherit;transition:transform .1s,opacity .1s}button:active{transform:scale(.96)}.btn-primary{background:var(--accent);color:#fff;padding:14px 24px;font-weight:600;width:100%}.btn-primary:hover{opacity:.9}.btn-secondary{background:var(--surface2);color:var(--text);padding:12px 20px;border:1px solid var(--border)}.btn-success{background:var(--success);color:#0f2117;padding:14px 24px;font-weight:700;width:100%}.btn-danger{background:var(--error);color:#1f0a0a;padding:14px 24px;font-weight:700;width:100%}.btn-ghost{background:transparent;color:var(--text-muted);padding:10px 16px;border:1px solid var(--border)}input[type=text],input[type=password],input[type=email]{background:var(--surface2);border:1.5px solid var(--border);color:var(--text);border-radius:var(--radius-sm);padding:14px 16px;font-size:16px;font-family:inherit;width:100%;outline:none;transition:border-color .2s}input:focus{border-color:var(--accent)}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}40%{transform:translate(8px)}60%{transform:translate(-6px)}80%{transform:translate(6px)}}@keyframes pop{0%{transform:scale(1)}40%{transform:scale(1.08)}70%{transform:scale(.97)}to{transform:scale(1)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{transform:translateY(40px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes glow{0%,to{box-shadow:0 0 8px var(--accent-glow)}50%{box-shadow:0 0 24px var(--accent-glow)}}.animate-shake{animation:shake .4s ease}.animate-pop{animation:pop .35s ease}.animate-fadeIn{animation:fadeIn .3s ease}.animate-slideUp{animation:slideUp .3s ease}.animate-pulse{animation:pulse 1.5s infinite}.xp-bar{height:6px;background:var(--surface2);border-radius:99px;overflow:hidden}.xp-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),#a78bfa);border-radius:99px;transition:width .5s ease}.streak-badge{display:inline-flex;align-items:center;gap:4px;background:linear-gradient(135deg,#f97316,#ef4444);color:#fff;border-radius:20px;padding:4px 10px;font-size:14px;font-weight:700}.pill{display:inline-flex;align-items:center;background:var(--surface2);border:1px solid var(--border);border-radius:20px;padding:4px 12px;font-size:13px;color:var(--text-muted);cursor:pointer;transition:all .15s}.pill.active{background:var(--accent);border-color:var(--accent);color:#fff}.progress-dots{display:flex;gap:6px;justify-content:center;flex-wrap:wrap}.progress-dot{width:10px;height:10px;border-radius:50%;background:var(--border);transition:background .2s}.progress-dot.correct{background:var(--success)}.progress-dot.wrong{background:var(--error)}.progress-dot.current{background:var(--accent);animation:glow 1.5s infinite}.feedback-correct{background:var(--success-glow);border:1.5px solid var(--success)}.feedback-wrong{background:var(--error-glow);border:1.5px solid var(--error)}.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:calc(var(--nav-height) + var(--safe-bottom));background:var(--surface);border-top:1px solid var(--border);display:flex;align-items:flex-start;padding-top:8px;z-index:100;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;background:none;color:var(--text-dim);padding:6px 0;font-size:10px;font-weight:500;border-radius:0}.nav-item.active{color:var(--accent)}.nav-icon{font-size:22px}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 0 16px}.header-xp{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-muted)}.word-card{background:linear-gradient(135deg,var(--surface),var(--surface2));border:1.5px solid var(--border);border-radius:20px;padding:32px 24px;text-align:center;min-height:160px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;position:relative;overflow:hidden}.word-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),#a78bfa,#ec4899)}.word-prompt{font-size:36px;font-weight:700;letter-spacing:-.5px}.word-category{font-size:12px;text-transform:uppercase;letter-spacing:1px;color:var(--text-dim)}.word-direction{font-size:12px;color:var(--accent);background:var(--accent-glow);padding:3px 10px;border-radius:20px}.choices{display:grid;grid-template-columns:1fr 1fr;gap:10px}.choice-btn{background:var(--surface2);border:1.5px solid var(--border);color:var(--text);padding:16px 12px;border-radius:var(--radius-sm);font-size:16px;font-weight:500;transition:all .15s}.choice-btn:active{transform:scale(.95)}.choice-btn.correct-choice{background:var(--success-glow);border-color:var(--success);color:var(--success)}.choice-btn.wrong-choice{background:var(--error-glow);border-color:var(--error);color:var(--error)}.toggle{display:flex;background:var(--surface2);border:1px solid var(--border);border-radius:99px;padding:3px;gap:2px}.toggle-opt{flex:1;background:transparent;color:var(--text-dim);padding:8px 14px;border-radius:99px;font-size:14px;font-weight:500;text-align:center;transition:all .2s}.toggle-opt.active{background:var(--accent);color:#fff}.car-mode-center{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;gap:24px;text-align:center}.mic-btn{width:90px;height:90px;border-radius:50%;background:var(--accent);color:#fff;font-size:36px;display:flex;align-items:center;justify-content:center;border:none;box-shadow:0 0 0 0 var(--accent-glow);transition:all .2s}.mic-btn.listening{animation:pulse 1s infinite,glow 1s infinite;box-shadow:0 0 30px var(--accent-glow)}.achievement-toast{position:fixed;top:20px;left:50%;transform:translate(-50%);background:var(--surface);border:1.5px solid var(--accent);border-radius:var(--radius);padding:12px 20px;display:flex;align-items:center;gap:10px;z-index:999;box-shadow:0 8px 32px #0006;animation:slideUp .4s ease;min-width:240px;max-width:90vw}.summary-ring{width:100px;height:100px;border-radius:50%;background:conic-gradient(var(--success) calc(var(--pct) * 1%),var(--surface2) 0);display:flex;align-items:center;justify-content:center;position:relative}.summary-ring:after{content:"";position:absolute;top:14px;right:14px;bottom:14px;left:14px;background:var(--surface);border-radius:50%}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;text-align:center}.stat-value{font-size:28px;font-weight:700;color:var(--accent)}.stat-label{font-size:12px;color:var(--text-muted);margin-top:4px}.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}.flex-col{display:flex;flex-direction:column}.section-title{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);font-weight:600;margin-bottom:8px}