*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{height:100%;overscroll-behavior:none;font-family:Fredoka,-apple-system,PingFang SC,Segoe UI,Noto Sans SC,sans-serif;-webkit-font-smoothing:antialiased}button{font-family:inherit;border:none;background:none;cursor:pointer;touch-action:manipulation}:root{--teal: #4ecdc4;--teal-dark: #44a08d;--red: #ff6b6b;--yellow: #ffd93d;--green: #6bcb77;--purple: #a78bfa;--blue: #4d96ff;--ink: #2d3436;--muted: #94a3b8;--bg-grad: linear-gradient(160deg, #e8fffe 0%, #fff9e6 60%, #f5f0ff 100%)}@keyframes popIn{0%{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}@keyframes slideIn{0%{opacity:0;transform:translate(24px)}to{opacity:1;transform:translate(0)}}@keyframes slideOutLeft{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(-24px)}}@keyframes riseIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes bounceY{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}@keyframes wobble{0%,to{transform:rotate(0)}25%{transform:rotate(6deg)}75%{transform:rotate(-6deg)}}@keyframes shimmerRing{0%{transform:scale(1);opacity:.18}50%{transform:scale(1.6);opacity:0}to{transform:scale(1);opacity:.18}}@keyframes confettiFall{0%{transform:translateY(-10vh) rotate(0);opacity:1}to{transform:translateY(110vh) rotate(720deg);opacity:.7}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}@keyframes pulseGlow{0%,to{box-shadow:0 0 #4ecdc466}50%{box-shadow:0 0 0 14px #4ecdc400}}@keyframes letterCatchFall{0%{transform:translate(-50%,-60px)}to{transform:translate(-50%,var(--d))}}.anim-pop{animation:popIn .28s cubic-bezier(.34,1.56,.64,1) both}.anim-slide{animation:slideIn .22s ease both}.anim-rise{animation:riseIn .35s ease both}.anim-shake{animation:shake .4s ease both}.tap-scale{transition:transform .12s ease}.tap-scale:active{transform:scale(.95)}.page{display:flex;flex-direction:column;height:100%;padding:14px;gap:12px;overflow-y:auto}.page-title{font-size:26px;font-weight:700;color:var(--ink)}.page-sub{font-size:14px;color:var(--muted)}.card{border-radius:22px;background:#fff;box-shadow:0 4px 18px #2d343614}.tabbar{position:fixed;bottom:0;left:0;right:0;z-index:40;background:#fffffff2;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-top:1.5px solid rgba(78,205,196,.18);padding-bottom:env(safe-area-inset-bottom,8px);box-shadow:0 -4px 32px #4ecdc41a;animation:riseIn .35s ease both}.tabbar-inner{display:flex;align-items:flex-end;justify-content:space-around;max-width:480px;margin:0 auto;padding:8px}.tab-btn{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:72px;padding:6px 12px;border-radius:16px;color:var(--muted)}.tab-btn.active{background:#4ecdc41f;color:var(--teal)}.tab-icon{width:44px;height:44px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:22px;transition:transform .15s ease}.tab-btn.active .tab-icon{background:linear-gradient(135deg,var(--teal),var(--teal-dark));transform:scale(1.12)}.tab-btn.active .tab-icon.icon-plain{background:transparent}.tab-label{font-size:12px;font-weight:500}.lang-toggle{display:flex;align-items:center;background:#ffffffe6;border-radius:999px;box-shadow:0 2px 10px #2d34361f;padding:3px;z-index:35}.lang-toggle button{padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;color:var(--muted)}.lang-toggle button.on{background:var(--teal);color:#fff}.back-btn{width:40px;height:40px;border-radius:14px;background:#ffffffe6;box-shadow:0 2px 8px #2d34361f;display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--ink);flex-shrink:0}.level-header{display:flex;align-items:center;gap:10px;padding:calc(env(safe-area-inset-top,0px) + 10px) 14px 8px;flex-shrink:0}.level-chip{font-size:15px;font-weight:700;color:var(--ink);background:#ffffffd9;padding:6px 14px;border-radius:999px;box-shadow:0 2px 8px #2d34361a}.hearts{margin-left:auto;display:flex;gap:4px;font-size:18px}.progress-track{height:6px;background:#0000000f;flex-shrink:0;margin:0 14px;border-radius:99px;overflow:hidden}.progress-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--teal),var(--blue));transition:width .4s ease}.letter-tile{width:72px;height:80px;border-radius:18px;display:flex;align-items:center;justify-content:center;font-size:40px;font-weight:800;text-transform:lowercase;background:#fff;border:3px solid rgba(78,205,196,.55);color:var(--ink);box-shadow:0 4px 10px #2d34361f;transition:transform .12s ease,background .15s ease,opacity .15s ease;-webkit-user-select:none;user-select:none}.letter-tile:active{transform:scale(.93)}.letter-tile.filled{background:linear-gradient(135deg,var(--teal),var(--teal-dark));color:#fff;border-color:transparent}.letter-tile.correct{background:linear-gradient(135deg,var(--green),#4caf50);color:#fff;border-color:transparent}.letter-tile.wrong{background:linear-gradient(135deg,var(--red),#e53935);color:#fff;border-color:transparent}.letter-tile.dim{opacity:.35}.tray-tile{touch-action:none;cursor:grab}.tray-tile:active{cursor:grabbing}.letter-tile.slot{background:#fff;color:transparent}.letter-tile.slot.filled{background:linear-gradient(135deg,var(--teal),var(--teal-dark));color:#fff;border-color:transparent}.hint-btn{width:52px;height:52px;border-radius:16px;background:#fffffff2;box-shadow:0 2px 8px #2d343624;display:flex;align-items:center;justify-content:center;padding:0;flex-shrink:0}.hint-btn img{width:44px;height:44px;object-fit:contain;pointer-events:none}.option-btn{padding:20px 22px;border-radius:20px;background:#fff;border:3px solid rgba(78,205,196,.4);font-size:26px;font-weight:800;color:var(--ink);box-shadow:0 4px 12px #2d34361a;transition:transform .12s ease,background .15s}.option-btn:active{transform:scale(.96)}.option-btn.correct{background:linear-gradient(135deg,var(--green),#4caf50);color:#fff;border-color:transparent}.option-btn.wrong{background:linear-gradient(135deg,var(--red),#e53935);color:#fff;border-color:transparent;animation:shake .4s ease}.option-btn.neutral{border-color:#2d34361f}.option-btn.neutral.correct,.option-btn.neutral.wrong{border-color:transparent}.action-btn{display:inline-flex;align-items:center;gap:8px;padding:14px 26px;border-radius:999px;background:linear-gradient(135deg,var(--teal),var(--teal-dark));color:#fff;font-size:18px;font-weight:700;box-shadow:0 4px 14px #4ecdc473}.action-btn:active{transform:scale(.95)}.action-btn.secondary{background:#fff;color:var(--ink);box-shadow:0 3px 10px #2d34361f}.feedback-banner{position:absolute;left:50%;transform:translate(-50%);bottom:calc(env(safe-area-inset-bottom,0px) + 90px);padding:10px 20px;border-radius:999px;font-size:15px;font-weight:700;color:#fff;z-index:50;animation:popIn .25s ease both;white-space:nowrap}.feedback-banner.good{background:linear-gradient(135deg,var(--green),#4caf50)}.feedback-banner.bad{background:linear-gradient(135deg,var(--red),#e53935)}.confetti-piece{position:fixed;top:0;width:10px;height:14px;border-radius:3px;z-index:90;pointer-events:none;animation:confettiFall linear both}.star-row{display:flex;justify-content:center;gap:8px;font-size:42px}.star-earned{animation:popIn .4s cubic-bezier(.34,1.56,.64,1) both}.star-dim{opacity:.25;filter:grayscale(1)}.level-node{width:68px;height:68px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;color:#fff;position:relative;box-shadow:0 4px 12px #2d343638}.level-node.next{animation:pulseGlow 1.8s infinite}.muted{color:var(--muted)}.center{display:flex;align-items:center;justify-content:center}.flex-1{flex:1}.gap-8{gap:8px}