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48%,#ffffff8c 56%,#0000 72%) 0 0/250% 100%;animation:4s ease-in-out infinite cardShimmer;position:absolute;inset:0}.pack-sel-card>*{z-index:1;position:relative}.pack-sel-card.active{border-color:var(--primary);-webkit-backdrop-filter:blur(20px)saturate(200%);background:linear-gradient(135deg,#667eea2e 0%,#764ba21f 100%);transform:translateY(-3px)scale(1.02);box-shadow:inset 0 0 0 1px #667eea66,0 8px 24px #667eea2e,0 2px 8px #00000014,inset 0 -1px #ffffff80}.pack-card-icon{-webkit-backdrop-filter:blur(8px);background:#ffffffb3;border:1px solid #ffffff80;border-radius:12px;justify-content:center;align-items:center;width:40px;height:40px;margin-bottom:12px;font-size:1.5rem;display:flex;box-shadow:0 1px 4px #0000000f}.pack-sel-card.active .pack-card-icon{background:#667eea1f;border-color:#667eea40}.pack-sel-name{color:var(--text);white-space:nowrap;text-overflow:ellipsis;width:100%;margin-bottom:4px;font-size:.95rem;font-weight:800;overflow:hidden}.pack-sel-count{color:var(--text-muted);font-size:.75rem;font-weight:600}.active-badge{background:var(--primary);color:#fff;width:22px;height:22px;box-shadow:0 2px 8px var(--primary-glow);border:2px solid #fff;border-radius:50%;justify-content:center;align-items:center;font-size:.75rem;font-weight:900;display:flex;position:absolute;top:12px;right:12px}[data-theme=dark] .active-badge{border-color:#222}.learn-content-scrollable>.stats-panel{margin-bottom:14px}.learn-mode-container{flex-direction:column;flex:1;min-height:0;margin-top:4px;transition:transform .4s cubic-bezier(.4,0,.2,1),opacity .3s;display:flex}.learn-mode-container.slide-left{animation:.4s forwards slideModeInLeft}.learn-mode-container.slide-right{animation:.4s forwards slideModeInRight}@keyframes slideModeInLeft{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}@keyframes slideModeInRight{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}[data-theme=dark] .learn-tabs{-webkit-backdrop-filter:blur(32px)saturate(180%)brightness(.9);background-color:#18182cf2;background-image:linear-gradient(105deg,#0000 20%,#667eff4d 35%,#508cff73 42%,#667eff4d 48%,#0000 65%),linear-gradient(160deg,#282841f2 0%,#1c1c32e0 40%,#141428cc 100%),none;background-position:0 0,0 0,0 0;background-repeat:repeat,repeat,repeat;background-size:300% 100%,100% 100%,100% 100%,100% 100%;background-attachment:scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box;border-color:#667eff2e;animation:5s ease-in-out infinite liquidShimmer,4s ease-in-out infinite borderBreath;box-shadow:inset 0 0 0 1px #667eff1a,0 6px 24px #0006,inset 0 1.5px #ffffff0f}[data-theme=dark] .learn-tab-pill{background:linear-gradient(135deg,#373755f2 0%,#282844e0 100%);border-color:#ffffff1a;box-shadow:0 2px 12px #667eea59,0 1px 3px #0000004d,inset 0 0 0 1px #ffffff0f}[data-theme=dark] .learn-tab-btn{color:#ffffff73}[data-theme=dark] .learn-tab-btn.active{color:#fffffff2}[data-theme=dark] .pack-sel-card{background:linear-gradient(135deg,#1e1e34d9 0%,#14142ac7 100%);border-color:#667eff1f;box-shadow:inset 0 0 0 1px #ffffff0a,0 4px 16px #00000047,inset 0 1px #ffffff0a}[data-theme=dark] .pack-sel-card.active{background:linear-gradient(135deg,#667eea38 0%,#764ba229 100%);border-color:#667eea80;box-shadow:inset 0 0 0 1px #667eea4d,0 8px 24px #667eea33,0 2px 8px #00000040,inset 0 -1px #ffffff0d}[data-theme=dark] .pack-card-icon{background:#ffffff0d;border-color:#ffffff0d}[data-theme=dark] .section-collapse-btn:hover{background:#ffffff0f}@media (hover:hover){.pack-sel-card:not(.active):hover{transform:translateY(-2px);box-shadow:inset 0 0 0 1px #667eff26,0 6px 20px #667eff14,inset 0 1px #ffffffeb}.section-collapse-btn:hover{background:var(--surface)}}.learn-mode-fullscreen{z-index:9998;background:var(--bg);position:fixed;inset:0;overflow:hidden}.learn-mode-fullscreen .pack-selector-wrapper,.learn-mode-fullscreen .stats-panel-wrapper{display:none!important}.learn-mode-fullscreen .learn-mode-container{flex:1;height:100dvh}.learn-mode-container .translate-tab-wrapper{flex-direction:column;flex:1;min-height:0;margin:0 -12px;display:flex}.learn-content-scrollable:has(.translate-tab-wrapper){padding-top:0}.learn-stage{flex-direction:column;align-items:center;width:100%;animation:.4s cubic-bezier(.2,.8,.2,1) modeFadeIn;display:flex}@keyframes modeFadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.learn-progress-area{width:100%;max-width:420px;margin-bottom:1.5rem}.learn-progress-track{background:#00000014;border-radius:10px;width:100%;height:10px;margin-bottom:8px;overflow:hidden;box-shadow:inset 0 1px 2px #0000000d}[data-theme=dark] .learn-progress-track{background:#ffffff0d}.learn-progress-bar{background:var(--hero-grad);height:100%;box-shadow:0 0 10px var(--primary-glow);border-radius:10px;transition:width .4s cubic-bezier(.34,1.56,.64,1)}.learn-progress-labels{color:var(--text-muted);justify-content:space-between;font-size:.75rem;font-weight:800;display:flex}.mode-card{-webkit-backdrop-filter:blur(25px);text-align:center;background:#fff9;border:1px solid #ffffffb3;border-radius:32px;flex-direction:column;justify-content:center;align-items:center;width:100%;max-width:420px;margin-bottom:2rem;padding:2.5rem 1.5rem;display:flex;box-shadow:0 15px 35px #0000000d}[data-theme=dark] .mode-card{background:#ffffff0a;border:1px solid #ffffff14}.text-hero{color:var(--text);font-size:2.4rem;font-weight:900;line-height:1.2}.quiz-audio-hint-btn{border:1.5px solid var(--primary-glow);background:var(--primary-soft);color:var(--primary);cursor:pointer;border-radius:20px;align-items:center;gap:8px;margin-top:1rem;padding:8px 16px;font-size:.85rem;font-weight:700;transition:all .2s;display:flex}.quiz-audio-hint-btn:active{transform:scale(.95)}.learn-action-row{justify-content:center;gap:24px;width:100%;max-width:420px;display:flex}.icon-action-btn{cursor:pointer;background:#fff;border:none;border-radius:50%;justify-content:center;align-items:center;width:72px;height:72px;font-size:1.5rem;transition:all .3s cubic-bezier(.34,1.56,.64,1);display:flex;box-shadow:0 8px 25px #00000014}[data-theme=dark] .icon-action-btn{background:#ffffff14}.icon-action-btn:active{transform:scale(.85)}.icon-action-btn.cross{color:var(--danger);border:2px solid #ff3b301a}.icon-action-btn.check{background:var(--hero-grad);color:#fff;box-shadow:0 10px 30px var(--primary-glow)}.fullscreen-float-btn{z-index:100;background:var(--hero-grad);color:#fff;cursor:pointer;width:52px;height:52px;box-shadow:0 10px 30px var(--primary-glow);-webkit-tap-highlight-color:transparent;border:none;border-radius:50%;justify-content:center;align-items:center;font-size:1.4rem;transition:all .3s cubic-bezier(.34,1.56,.64,1);display:flex;position:fixed;bottom:24px;right:20px}.report-card{text-align:center;padding:3rem 2rem;animation:.6s cubic-bezier(.34,1.56,.64,1) reportPop}@keyframes reportPop{0%{opacity:0;transform:scale(.8)translateY(20px)}to{opacity:1;transform:scale(1)translateY(0)}}.report-emoji{filter:drop-shadow(0 10px 20px #0000001a);margin-bottom:1.5rem;font-size:5rem;animation:2s ease-in-out infinite emojiBounce}@keyframes emojiBounce{0%,to{transform:translateY(0)scale(1)}50%{transform:translateY(-15px)scale(1.1)}}.report-title{color:var(--text);background:var(--hero-grad);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:2rem;font-size:2rem;font-weight:900}.report-stats-grid{grid-template-columns:1fr 1fr;gap:20px;width:100%;max-width:360px;margin:0 auto 2.5rem;display:grid}.stat-box{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff80;border:1px solid #ffffffb3;border-radius:24px;flex-direction:column;gap:4px;padding:20px;display:flex;box-shadow:0 8px 20px #0000000a}[data-theme=dark] .stat-box{background:#ffffff0d;border-color:#ffffff1a}.stat-val{color:var(--primary);font-size:1.8rem;font-weight:900}.stat-lbl{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.8rem;font-weight:700}.action-btn.primary{background:var(--hero-grad);color:#fff;cursor:pointer;box-shadow:0 10px 30px var(--primary-glow);border:none;border-radius:18px;padding:16px 32px;font-size:1.1rem;font-weight:800;transition:all .3s cubic-bezier(.34,1.56,.64,1)}.action-btn.primary:hover{box-shadow:0 15px 40px var(--primary-glow);transform:translateY(-3px)scale(1.02)}.immersive-container{background:radial-gradient(circle at 50% 50%, var(--bg) 0%, var(--bg-secondary) 100%);position:relative;overflow:hidden}.immersive-orb{filter:blur(80px);z-index:0;opacity:.3;pointer-events:none;border-radius:50%;position:absolute}.orb-1{background:var(--primary);width:40%;height:40%;top:-10%;left:-10%}.orb-2{background:var(--accent);width:35%;height:35%;bottom:-10%;right:-10%}.quiz-opt{border:1.5px solid var(--border);transition:all .25s cubic-bezier(.2,.8,.2,1);position:relative;overflow:hidden}.quiz-opt.correct{border-color:var(--success);animation:.5s forwards optionCorrect}.quiz-opt.wrong{border-color:var(--danger);background:var(--danger-soft);color:var(--danger);animation:.4s forwards optionWrong}.quiz-opt.should-have-selected{border-color:var(--success);border-style:dashed}.dict-main-play-btn{background:var(--hero-grad);color:#fff;cursor:pointer;width:84px;height:84px;box-shadow:0 12px 32px var(--primary-glow);z-index:1;border:none;border-radius:50%;position:relative}.pulse-ring{border:4px solid var(--primary);pointer-events:none;border-radius:50%;animation:2s infinite audioPulse;position:absolute;inset:0}.pulse-ring:nth-child(2){animation-delay:.5s}@media (width<=480px){.learn-tabs-container{padding:6px 8px 4px}.learn-tabs{border-radius:18px;gap:3px;padding:5px}.learn-tab-btn .icon{font-size:1rem}.learn-tab-pill{border-radius:11px;top:4px;left:4px}.learn-content-scrollable{padding:4px 8px calc(90px + env(safe-area-inset-bottom,20px))}.pack-selector{gap:10px;padding:4px 2px 12px}.pack-sel-card{border-radius:20px;min-width:140px;padding:14px}.pack-card-icon{width:36px;height:36px;font-size:1.3rem}.mode-card{border-radius:24px;padding:1.5rem 1rem}.text-hero{font-size:1.8rem}.icon-action-btn{width:64px;height:64px}.learn-progress-area{margin-bottom:1rem}.learn-progress-track{height:8px}.learn-action-row.icon-mode{gap:30px}.fullscreen-float-btn{width:46px;height:46px;font-size:1.2rem;bottom:20px;right:16px}}@media (prefers-contrast:high){.mode-card,.icon-action-btn{border-width:2px}}@media (prefers-reduced-motion:reduce){.learn-tab-btn,.learn-tab-pill,.learn-mode-container,.pack-sel-card,.mode-card,.icon-action-btn,.report-card{transition:none!important;animation:none!important}.learn-tab-btn:active{transform:scale(.95)}}