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var(--transition);box-shadow:var(--shadow-sm);background:#fff;border-radius:50%;position:absolute;top:2px;left:2px}.toggle.on:after{transform:translate(20px)}.empty-state{text-align:center;color:var(--text-secondary);padding:48px 20px}.empty-state img{opacity:.8;width:120px;margin-bottom:16px}.empty-state p{font-size:16px;font-weight:600}@keyframes confetti{0%{opacity:1;transform:translateY(0)scale(1)}to{opacity:0;transform:translateY(-40px)scale(.5)}}.btn,.tab{min-height:44px}.test-option{min-height:48px}.lang-btn{min-height:36px}.word-item .delete-btn{justify-content:center;align-items:center;min-width:44px;min-height:44px;display:flex}@media (width<=768px){.container{padding:16px 14px}.header h1{font-size:20px}.flashcard-container{height:240px}}@media (width<=480px){.container{padding:14px 12px}.auth-page{padding:16px}.auth-card{border-radius:16px;padding:24px 18px}.flashcard-container{height:220px}.flashcard-front,.flashcard-back{border-radius:14px;padding:16px;font-size:22px}.results-score{font-size:40px}.sticker-reaction img{width:100px;height:100px}.sticker-reaction.large img{width:130px;height:130px}.btn-row{gap:8px}.btn{padding:12px 16px;font-size:14px}.modal{border-radius:16px;padding:20px}.share-code{letter-spacing:4px;font-size:22px}.header{margin-bottom:16px}.lang-switcher{gap:2px}.lang-btn{padding:4px 8px;font-size:11px}}@supports (padding:env(safe-area-inset-top)){.container{padding-top:calc(20px + env(safe-area-inset-top));padding-bottom:calc(16px + env(safe-area-inset-bottom))}.auth-page{padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}