:root{--penguin-blue: #4ecdc4;--penguin-blue-light: #a8e6cf;--penguin-blue-dark: #2d9a8c;--penguin-orange: #ff6b35;--penguin-orange-light: #ff9f7a;--penguin-white: #f7fff7;--penguin-dark: #1a1a2e;--penguin-yellow: #ffe66d;--penguin-pink: #ff6b9d;--penguin-purple: #9b59b6;--penguin-green: #27ae60;--penguin-sky: #87ceeb}.kids-app{min-height:100vh;background:linear-gradient(180deg,#87ceeb,#4ecdc4,#a8e6cf 60%,#f7fff7);font-family:Zen Kaku Gothic New,Hiragino Kaku Gothic ProN,sans-serif;padding-bottom:80px}.kids-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh}.kids-loading-spinner{text-align:center}.kids-loading-text{margin-top:1rem;font-size:1.25rem;color:var(--penguin-dark)}.kids-penguin-bounce{display:inline-block;font-size:4rem;animation:penguinBounce .6s infinite alternate ease-in-out}@keyframes penguinBounce{0%{transform:translateY(0)}to{transform:translateY(-20px)}}.kids-header{position:sticky;top:0;z-index:50;background:linear-gradient(135deg,var(--penguin-blue) 0%,var(--penguin-blue-dark) 100%);box-shadow:0 4px 20px #00000026}.kids-header-content{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;max-width:600px;margin:0 auto}.kids-header-left{width:50px}.kids-header-back{background:#fff3;border:none;border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.kids-header-back:hover{background:#ffffff4d;transform:scale(1.1)}.kids-header-back-icon{width:24px;height:24px;color:#fff}.kids-header-center{display:flex;align-items:center;gap:.5rem}.kids-header-penguin{font-size:1.5rem}.kids-header-title{font-size:1.25rem;font-weight:700;color:#fff;text-shadow:2px 2px 4px rgba(0,0,0,.2)}.kids-header-right{display:flex;align-items:center;gap:.5rem}.kids-header-level{background:var(--penguin-yellow);color:var(--penguin-dark);padding:.25rem .75rem;border-radius:20px;font-weight:700;display:flex;align-items:center;gap:.25rem;box-shadow:2px 2px #0000001a}.kids-header-level-label{font-size:.75rem}.kids-header-level-value{font-size:1rem}.kids-header-settings{background:#fff3;border:none;border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.kids-header-settings:hover{background:#ffffff4d}.kids-header-settings-icon{width:20px;height:20px;color:#fff}.kids-main{max-width:600px;margin:0 auto;padding:1rem}.kids-navbar{position:fixed;bottom:0;left:0;right:0;z-index:50;background:linear-gradient(135deg,var(--penguin-dark) 0%,#2c3e50 100%);display:flex;justify-content:space-around;padding:.5rem .25rem;padding-bottom:calc(.5rem + env(safe-area-inset-bottom));box-shadow:0 -4px 20px #0003}.kids-nav-item{display:flex;flex-direction:column;align-items:center;padding:.5rem;border:none;background:none;cursor:pointer;border-radius:12px;transition:all .2s;min-width:60px}.kids-nav-item:hover{background:#ffffff1a}.kids-nav-active{background:#4ecdc44d}.kids-nav-icon{font-size:1.5rem}.kids-nav-icon-abc{font-size:1rem;font-weight:700;color:#fff;background:var(--penguin-orange);padding:.25rem .5rem;border-radius:8px}.kids-nav-label{font-size:.65rem;color:#fff;margin-top:.25rem}.kids-home{padding-top:1rem}.kids-home-hero{text-align:center;margin-bottom:2rem}.kids-home-character-name{font-size:1.5rem;font-weight:700;color:var(--penguin-dark);margin-top:.5rem;text-shadow:2px 2px 0 white}.kids-home-menu{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;margin-bottom:2rem}.kids-menu-button{background:#fff;border:none;border-radius:20px;padding:1.5rem 1rem;display:flex;flex-direction:column;align-items:center;gap:.5rem;cursor:pointer;box-shadow:0 4px 15px #0000001a;transition:all .2s}.kids-menu-button:hover{transform:translateY(-4px);box-shadow:0 8px 25px #00000026}.kids-menu-button:active{transform:scale(.98)}.kids-menu-icon{font-size:2.5rem}.kids-menu-alphabet .kids-menu-icon{font-size:1.75rem;font-weight:700;color:var(--penguin-blue-dark);background:var(--penguin-blue-light);padding:.5rem 1rem;border-radius:12px}.kids-menu-label{font-size:1rem;font-weight:700;color:var(--penguin-dark)}.kids-menu-sublabel{font-size:.75rem;color:#666}.kids-home-stats{display:flex;justify-content:center;gap:1.5rem;background:#fff;padding:1rem;border-radius:16px;box-shadow:0 4px 15px #0000001a}.kids-stat-item{display:flex;flex-direction:column;align-items:center;gap:.25rem}.kids-stat-icon{font-size:1.5rem}.kids-stat-value{font-size:1.5rem;font-weight:700;color:var(--penguin-dark)}.kids-stat-label{font-size:.7rem;color:#666}.kids-penguin{display:inline-block}.kids-penguin-small .kids-penguin-svg{width:60px;height:72px}.kids-penguin-medium .kids-penguin-svg{width:100px;height:120px}.kids-penguin-large .kids-penguin-svg{width:150px;height:180px}.kids-penguin-idle{animation:penguinIdle 2s infinite ease-in-out}.kids-penguin-happy{animation:penguinHappy .5s ease-out}.kids-penguin-sad{animation:penguinSad .5s ease-out}.kids-penguin-excited{animation:penguinExcited .8s infinite}@keyframes penguinIdle{0%,to{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-5px) rotate(1deg)}}@keyframes penguinHappy{0%{transform:translateY(0)}25%{transform:translateY(-30px)}50%{transform:translateY(-15px)}75%{transform:translateY(-20px)}to{transform:translateY(0)}}@keyframes penguinSad{0%,to{transform:translateY(0) rotate(0)}25%{transform:translateY(5px) rotate(-3deg)}75%{transform:translateY(5px) rotate(3deg)}}@keyframes penguinExcited{0%,to{transform:rotate(0) scale(1)}25%{transform:rotate(-10deg) scale(1.1)}75%{transform:rotate(10deg) scale(1.1)}}.kids-penguin-wing-left,.kids-penguin-wing-right{transform-origin:center;animation:wingFlap 1s infinite ease-in-out}.kids-penguin-wing-right{animation-delay:.1s}@keyframes wingFlap{0%,to{transform:rotate(-15deg)}50%{transform:rotate(-25deg)}}.kids-penguin-hearts,.kids-penguin-sparkles{position:absolute;top:-20px;left:50%;transform:translate(-50%);display:flex;gap:.5rem}.kids-penguin-heart,.kids-penguin-sparkle{animation:floatUp 1s ease-out forwards;opacity:0}.kids-penguin-heart:nth-child(2),.kids-penguin-sparkle:nth-child(2){animation-delay:.2s}.kids-penguin-heart:nth-child(3),.kids-penguin-sparkle:nth-child(3){animation-delay:.4s}@keyframes floatUp{0%{transform:translateY(0);opacity:1}to{transform:translateY(-50px);opacity:0}}.kids-progress{text-align:center;margin-top:1rem}.kids-progress-level{display:flex;align-items:center;justify-content:center;gap:.5rem;margin-bottom:.5rem}.kids-progress-level-label{font-size:1rem;color:var(--penguin-dark)}.kids-progress-level-value{font-size:2rem;font-weight:700;color:var(--penguin-orange);text-shadow:2px 2px 0 white}.kids-progress-stars{display:flex;justify-content:center;gap:.25rem;margin-bottom:.75rem}.kids-progress-star{font-size:1.25rem;opacity:.3}.kids-progress-star-filled{opacity:1;animation:starPop .3s ease-out}@keyframes starPop{0%{transform:scale(0)}50%{transform:scale(1.3)}to{transform:scale(1)}}.kids-progress-bar-container{max-width:200px;margin:0 auto}.kids-progress-bar{height:16px;background:#ffffff80;border-radius:8px;overflow:hidden;box-shadow:inset 0 2px 4px #0000001a}.kids-progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--penguin-yellow) 0%,var(--penguin-orange) 100%);border-radius:8px;transition:width .5s ease-out}.kids-progress-exp{font-size:.75rem;color:var(--penguin-dark);margin-top:.25rem}.kids-section-title{font-size:1.75rem;font-weight:700;color:var(--penguin-dark);text-align:center;text-shadow:2px 2px 0 white}.kids-section-subtitle{font-size:1rem;color:#555;text-align:center;margin-top:.5rem}.kids-stat-badge{display:inline-flex;align-items:center;gap:.5rem;background:#fff;padding:.5rem 1rem;border-radius:30px;box-shadow:0 2px 8px #0000001a}.kids-stat-badge-gold{background:linear-gradient(135deg,var(--penguin-yellow) 0%,#ffd93d 100%)}.kids-stat-badge-icon{font-size:1.25rem}.kids-stat-badge-value{font-size:1.25rem;font-weight:700;color:var(--penguin-dark)}.kids-stat-badge-label{font-size:.75rem;color:#666}.kids-alphabet-home,.kids-words-home,.kids-phrases-home{padding:1rem 0}.kids-alphabet-header,.kids-words-header,.kids-phrases-header{text-align:center;margin-bottom:1.5rem}.kids-alphabet-stats,.kids-words-stats,.kids-phrases-stats{display:flex;justify-content:center;gap:1rem;margin-top:1rem}.kids-alphabet-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.75rem;margin-bottom:2rem}.kids-alphabet-card{aspect-ratio:1;background:#fff;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative;box-shadow:0 4px 10px #0000001a;transition:all .2s}.kids-alphabet-card:hover{transform:scale(1.05)}.kids-alphabet-learned{background:var(--penguin-blue-light)}.kids-alphabet-mastered{background:linear-gradient(135deg,var(--penguin-yellow) 0%,#ffd93d 100%)}.kids-alphabet-letter{font-size:1.5rem;font-weight:700;color:var(--penguin-dark)}.kids-alphabet-lowercase{font-size:1rem;color:#666}.kids-alphabet-image{font-size:1rem}.kids-alphabet-star{position:absolute;top:-4px;right:-4px;font-size:1rem}.kids-category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.kids-category-card{background:#fff;border:none;border-radius:20px;padding:1.25rem;display:flex;flex-direction:column;align-items:center;gap:.5rem;cursor:pointer;box-shadow:0 4px 15px #0000001a;transition:all .2s;border-left:4px solid var(--category-color, var(--penguin-blue))}.kids-category-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px #00000026}.kids-category-icon{font-size:2.5rem}.kids-category-name{font-size:1rem;font-weight:700;color:var(--penguin-dark)}.kids-category-name-en{font-size:.75rem;color:#888}.kids-category-progress{width:100%;margin-top:.5rem}.kids-category-progress-bar{height:8px;background:#eee;border-radius:4px;overflow:hidden}.kids-category-progress-fill{height:100%;background:var(--category-color, var(--penguin-blue));border-radius:4px;transition:width .3s ease-out}.kids-category-progress-text{font-size:.7rem;color:#888;text-align:right;display:block;margin-top:.25rem}.kids-action-buttons{display:flex;justify-content:center;margin-top:2rem}.kids-button{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border:none;border-radius:50px;font-size:1rem;font-weight:700;cursor:pointer;transition:all .2s;box-shadow:0 4px 15px #0003}.kids-button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #00000040}.kids-button:active{transform:scale(.98)}.kids-button-primary{background:linear-gradient(135deg,var(--penguin-orange) 0%,#ff8a5c 100%);color:#fff}.kids-button-secondary{background:#fff;color:var(--penguin-dark)}.kids-button-large{padding:1rem 2rem;font-size:1.25rem}.kids-button-icon{font-size:1.25rem}.kids-quiz{padding:1rem 0}.kids-quiz-loading{text-align:center;padding:3rem 1rem}.kids-quiz-category{display:flex;align-items:center;justify-content:center;gap:.5rem;margin-bottom:1rem}.kids-quiz-category-icon{font-size:1.5rem}.kids-quiz-category-name{font-size:1.25rem;font-weight:700;color:var(--penguin-dark)}.kids-quiz-progress{margin-bottom:1.5rem}.kids-quiz-progress-bar{height:12px;background:#ffffff80;border-radius:6px;overflow:hidden}.kids-quiz-progress-fill{height:100%;background:linear-gradient(90deg,var(--penguin-blue) 0%,var(--penguin-green) 100%);border-radius:6px;transition:width .3s ease-out}.kids-quiz-progress-text{display:block;text-align:center;font-size:.875rem;color:var(--penguin-dark);margin-top:.5rem;font-weight:700}.kids-quiz-penguin{display:flex;justify-content:center;margin-bottom:1.5rem}.kids-quiz-question{text-align:center;margin-bottom:1.5rem}.kids-quiz-listen{display:flex;flex-direction:column;align-items:center;gap:1rem}.kids-quiz-listen-btn{display:flex;align-items:center;justify-content:center;gap:.75rem;padding:1rem 2rem;background:linear-gradient(135deg,var(--penguin-blue) 0%,var(--penguin-blue-dark) 100%);color:#fff;border:none;border-radius:50px;font-size:1.25rem;font-weight:700;cursor:pointer;box-shadow:0 4px 15px #0003;transition:all .2s}.kids-quiz-listen-btn:hover:not(:disabled){transform:scale(1.05)}.kids-quiz-listen-btn:disabled{opacity:.7}.kids-quiz-listen-icon{width:28px;height:28px}.kids-quiz-instruction{font-size:1.25rem;color:var(--penguin-dark);font-weight:700}.kids-quiz-image{display:flex;flex-direction:column;align-items:center;gap:1rem}.kids-quiz-image-emoji{font-size:5rem;animation:emojiBounce 1s infinite ease-in-out}@keyframes emojiBounce{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.kids-quiz-speak{display:flex;flex-direction:column;align-items:center;gap:1rem;padding:1rem}.kids-quiz-listen-btn-small{padding:.5rem 1.25rem;font-size:1rem}.kids-quiz-speak-target{display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:1.5rem;background:#fff;border-radius:20px;box-shadow:0 4px 15px #0000001a}.kids-quiz-speak-letter{font-size:5rem;font-weight:700;color:var(--penguin-blue-dark);line-height:1}.kids-quiz-speak-word{font-size:2rem;font-weight:700;color:var(--penguin-dark);margin-top:.5rem}.kids-quiz-speak-phrase{font-size:1.5rem;font-weight:700;color:var(--penguin-dark);margin-top:.5rem;text-align:center;line-height:1.4}.kids-quiz-speak-hint{font-size:3rem}.kids-quiz-record-buttons{display:flex;justify-content:center;margin-top:1rem}.kids-quiz-record-btn{display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:1.5rem 2.5rem;border:none;border-radius:20px;font-size:1.25rem;font-weight:700;cursor:pointer;box-shadow:0 6px 20px #0003;transition:all .2s}.kids-quiz-record-btn svg{width:48px;height:48px}.kids-quiz-record-btn-start{background:linear-gradient(135deg,var(--penguin-orange) 0%,#ff4500 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.75rem;border-radius:10px;margin-top:.5rem}.kids-quiz-hint{display:block;font-size:.9rem;color:var(--penguin-dark);opacity:.8;margin-top:.5rem}.kids-quiz-options{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.kids-quiz-options-phrase{grid-template-columns:1fr}.kids-quiz-option{background:#fff;border:3px solid transparent;border-radius:16px;padding:1rem;display:flex;flex-direction:column;align-items:center;gap:.5rem;cursor:pointer;box-shadow:0 4px 10px #0000001a;transition:all .2s}.kids-quiz-option:hover:not(:disabled){transform:scale(1.02);border-color:var(--penguin-blue)}.kids-quiz-option:disabled{cursor:default}.kids-quiz-option-correct{background:#d4edda!important;border-color:var(--penguin-green)!important;animation:correctPop .3s ease-out}.kids-quiz-option-wrong{background:#f8d7da!important;border-color:#dc3545!important;animation:wrongShake .3s ease-out}@keyframes correctPop{0%{transform:scale(1)}50%{transform:scale(1.1)}to{transform:scale(1)}}@keyframes wrongShake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}.kids-quiz-option-letter{font-size:2rem;font-weight:700;color:var(--penguin-dark)}.kids-quiz-option-image{font-size:2.5rem}.kids-quiz-option-text{font-size:.9rem;color:#555;text-align:center}.kids-quiz-option-word{padding:1.25rem}.kids-quiz-option-phrase{flex-direction:row;justify-content:flex-start;padding:1rem 1.5rem}.kids-quiz-option-phrase .kids-quiz-option-image{font-size:1.75rem}.kids-quiz-option-phrase .kids-quiz-option-text{font-size:1rem;text-align:left}.kids-quiz-result{position:fixed;bottom:100px;left:50%;transform:translate(-50%);background:#fff;padding:1.5rem 2rem;border-radius:20px;box-shadow:0 8px 30px #0003;display:flex;flex-direction:column;align-items:center;gap:1rem;z-index:100;animation:slideUp .3s ease-out}.kids-quiz-result-correct{border-top:4px solid var(--penguin-green)}.kids-quiz-result-wrong{border-top:4px solid #dc3545}.kids-quiz-result-icon{font-size:3rem}.kids-quiz-result-text{font-size:1rem;color:var(--penguin-dark);font-weight:700;text-align:center}@keyframes slideUp{0%{transform:translate(-50%,100%);opacity:0}to{transform:translate(-50%);opacity:1}}.kids-session-result{text-align:center;padding:2rem 1rem}.kids-result-penguin{margin-bottom:1.5rem}.kids-result-message{font-size:1.75rem;font-weight:700;color:var(--penguin-dark);margin-bottom:1rem;text-shadow:2px 2px 0 white}.kids-result-stars{display:flex;justify-content:center;gap:.5rem;margin-bottom:1.5rem}.kids-result-star{font-size:3rem;opacity:.3;transition:all .3s}.kids-result-star-filled{opacity:1;animation:starAppear .5s ease-out backwards}.kids-result-star:nth-child(1){animation-delay:0s}.kids-result-star:nth-child(2){animation-delay:.2s}.kids-result-star:nth-child(3){animation-delay:.4s}@keyframes starAppear{0%{transform:scale(0) rotate(-180deg);opacity:0}to{transform:scale(1) rotate(0);opacity:1}}.kids-result-score{margin-bottom:1.5rem}.kids-result-score-circle{display:inline-flex;align-items:baseline;justify-content:center;width:120px;height:120px;background:linear-gradient(135deg,var(--penguin-blue) 0%,var(--penguin-blue-dark) 100%);border-radius:50%;color:#fff}.kids-result-score-value{font-size:3rem;font-weight:700}.kids-result-score-percent{font-size:1.5rem}.kids-result-score-detail{margin-top:.5rem;font-size:1rem;color:#555}.kids-result-exp{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:.5rem;background:linear-gradient(135deg,var(--penguin-yellow) 0%,#ffd93d 100%);padding:1rem 1.5rem;border-radius:50px;margin-bottom:2rem}.kids-result-exp-icon{font-size:1.5rem}.kids-result-exp-value{font-size:1.5rem;font-weight:700;color:var(--penguin-dark)}.kids-result-exp-bonus{font-size:.875rem;color:var(--penguin-orange);font-weight:700}.kids-result-buttons{display:flex;flex-direction:column;gap:1rem;align-items:center}.kids-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .3s ease-out}.kids-modal{position:relative;background:linear-gradient(180deg,#87ceeb,#f7fff7);border-radius:30px;padding:2rem;max-width:90%;width:350px;max-height:90vh;overflow-y:auto}.kids-levelup-modal{text-align:center;overflow:hidden}.kids-confetti{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;overflow:hidden}.kids-confetti-piece{position:absolute;width:10px;height:10px;border-radius:2px;animation:confettiFall 3s linear infinite}@keyframes confettiFall{0%{transform:translateY(-100%) rotate(0);opacity:1}to{transform:translateY(100vh) rotate(720deg);opacity:0}}.kids-levelup-content{opacity:0;transform:scale(.8);transition:all .5s ease-out}.kids-levelup-show{opacity:1;transform:scale(1)}.kids-levelup-title{font-size:1.75rem;font-weight:700;color:var(--penguin-dark);margin-bottom:1.5rem;display:flex;align-items:center;justify-content:center;gap:.5rem}.kids-levelup-title-star{animation:starSpin 1s linear infinite}@keyframes starSpin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.kids-levelup-penguin{margin-bottom:1.5rem}.kids-levelup-levels{display:flex;align-items:center;justify-content:center;gap:1rem;margin-bottom:1.5rem}.kids-levelup-old-level{font-size:1.5rem;color:#888}.kids-levelup-arrow{font-size:1.5rem;color:var(--penguin-orange)}.kids-levelup-new-level{font-size:2.5rem;font-weight:700;color:var(--penguin-orange);text-shadow:2px 2px 0 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