:root{--bg:#FFF8F0;--surface:#FFFFFF;--accent:#FF8C42;--accent-light:#FFD4A8;--accent-dark:#E06B1F;--green:#4ECB71;--green-light:#D4F5E0;--red:#FF6B6B;--red-light:#FFE0E0;--blue:#5B9BD5;--blue-light:#D6EAF8;--purple:#9B6DD7;--text-primary:#2D2D2D;--text-muted:#8C8C8C;--shadow:0 4px 20px rgba(0,0,0,.08);--shadow-hover:0 8px 30px rgba(0,0,0,.12);--radius:20px;--radius-sm:12px}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{height:100%;overflow:hidden}
body{font-family:'Nunito',sans-serif;background:var(--bg);color:var(--text-primary)}
.app-container{max-width:800px;margin:0 auto;padding:12px 16px;height:100vh;height:100dvh;display:flex;flex-direction:column;overflow:hidden}
.app-header{text-align:center;padding:8px 0 4px;flex-shrink:0;animation:fadeDown .6s ease}
.app-header h1{font-family:'Fredoka',sans-serif;font-size:1.6em;font-weight:700;color:var(--accent);line-height:1.2}.app-header h1 span{color:var(--blue)}
.stats-bar{display:flex;justify-content:center;gap:10px;margin:6px 0 4px;flex-wrap:wrap;flex-shrink:0}
.stat-item{background:var(--surface);border-radius:var(--radius-sm);padding:6px 12px;box-shadow:var(--shadow);text-align:center;min-width:65px;animation:fadeUp .5s ease backwards}
.stat-item:nth-child(2){animation-delay:.1s}.stat-item:nth-child(3){animation-delay:.2s}.stat-item:nth-child(4){animation-delay:.3s}
.stat-num{font-family:'Fredoka',sans-serif;font-size:1.1em;font-weight:700;color:var(--accent);line-height:1}
.stat-item:nth-child(2) .stat-num{color:var(--green)}.stat-item:nth-child(3) .stat-num{color:var(--blue)}.stat-item:nth-child(4) .stat-num{color:var(--red)}
.stat-label{font-size:.6em;color:var(--text-muted);margin-top:1px}
.stat-item.triple-clickable{cursor:pointer;user-select:none;-webkit-user-select:none;position:relative}
.stat-item.triple-clickable:active{transform:scale(.96)}
.stat-item.triple-clickable .stat-num.shake{animation:shakeNum .4s ease}
@keyframes shakeNum{0%,100%{transform:translateX(0)}20%{transform:translateX(-4px)}40%{transform:translateX(4px)}60%{transform:translateX(-3px)}80%{transform:translateX(3px)}}
.nav-tabs{display:flex;gap:4px;margin-bottom:8px;justify-content:center;flex-shrink:0;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none}.nav-tabs::-webkit-scrollbar{display:none}
.nav-tab{font-family:'Fredoka',sans-serif;font-size:.78em;font-weight:600;padding:7px 12px;border-radius:50px;border:2.5px solid transparent;background:var(--surface);color:var(--text-muted);cursor:pointer;transition:all .25s;box-shadow:var(--shadow);white-space:nowrap;flex-shrink:0}
.nav-tab:hover{color:var(--accent);border-color:var(--accent-light)}.nav-tab.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.section-panel{display:none;flex:1;min-height:0;flex-direction:column;animation:fadeUp .4s ease}.section-panel.active{display:flex}
.voice-bar{background:var(--surface);border-radius:var(--radius);padding:8px 12px;box-shadow:var(--shadow);margin-bottom:8px;flex-wrap:wrap;flex-shrink:0;animation:fadeUp .5s ease}
.voice-bar[open] #voice-bar-arrow{transform:rotate(90deg)}
.voice-bar label{font-family:'Fredoka',sans-serif;font-size:.75em;font-weight:600;color:var(--text-muted);white-space:nowrap}
.voice-bar select{font-family:'Nunito',sans-serif;font-size:.78em;font-weight:600;padding:5px 10px;border-radius:50px;border:2px solid #eee;background:#fff;color:var(--text-primary);outline:none;cursor:pointer;-webkit-appearance:none;max-width:88px}
.voice-bar input[type=range]{width:55px;accent-color:var(--accent);cursor:pointer}
.voice-bar .speed-val{font-family:'Fredoka',sans-serif;font-size:.7em;color:var(--text-muted);min-width:20px}
.icon-btn{font-size:.82em;padding:5px 10px;border-radius:50px;border:2.5px solid #eee;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:2px;background:var(--blue);color:#fff;box-shadow:0 3px 10px rgba(91,155,213,.25)}.icon-btn:hover{transform:translateY(-1px)}.icon-btn.purple{background:var(--purple)}.icon-btn.green{background:var(--green)}.icon-btn.orange{background:var(--accent)}.icon-btn.teal{background:#20B2AA}.icon-btn.pink{background:#FF69B4}.icon-btn.dark-toggle{background:#2D2D2D;color:#fff}
.speak-btn{background:none;border:none;cursor:pointer;font-size:1.2em;transition:transform .15s,opacity .15s;opacity:.65;line-height:1;padding:3px;vertical-align:middle}
.speak-btn:active{transform:scale(1.3);opacity:1}
.speak-btn.playing{opacity:1;animation:pulse .6s ease infinite alternate}
@keyframes pulse{from{transform:scale(1)}to{transform:scale(1.15)}}
.word-list-controls{display:flex;gap:6px;margin-bottom:6px;flex-wrap:wrap;align-items:center;flex-shrink:0}
.search-wrapper{position:relative;flex:1;min-width:0}
.search-box{width:100%;padding:8px 14px;padding-right:32px;border-radius:50px;border:2.5px solid #eee;font-family:'Nunito',sans-serif;font-size:.85em;outline:none;transition:border-color .2s;background:var(--surface)}.search-box:focus{border-color:var(--accent)}
.search-clear-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:20px;height:20px;border-radius:50%;border:none;background:#ddd;color:#fff;font-size:12px;line-height:20px;text-align:center;cursor:pointer;display:none;padding:0;transition:background .2s}
.search-clear-btn:hover{background:#aaa}.search-clear-btn.show{display:block}
.ai-lookup-btn{display:inline-flex;align-items:center;gap:5px;padding:7px 12px;border-radius:50px;border:2.5px solid #eee;background:var(--surface);font-family:'Fredoka',sans-serif;font-size:.75em;font-weight:600;color:var(--text-primary);cursor:pointer;transition:all .2s;box-shadow:0 2px 8px rgba(0,0,0,.05);white-space:nowrap;flex-shrink:0}
.ai-lookup-btn:hover{border-color:var(--purple);color:var(--purple);transform:translateY(-1px);box-shadow:var(--shadow)}
.ai-lookup-btn .cap{display:inline-flex;align-items:center;justify-content:center;width:26px;height:16px;border-radius:8px;background:linear-gradient(90deg,var(--purple) 50%,var(--accent) 50%);color:#fff;font-size:10px;font-weight:700;flex-shrink:0;letter-spacing:0}
.ai-lookup-btn .cap-blue{background:linear-gradient(90deg,var(--blue) 50%,var(--green) 50%)}
.btn-custom{font-family:'Fredoka',sans-serif;font-weight:600;font-size:.9em;padding:12px 22px;border-radius:50px;border:none;cursor:pointer;transition:all .25s}.btn-custom:hover{transform:translateY(-1px)}.btn-custom:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-orange{background:var(--accent);color:#fff}.btn-blue{background:var(--blue);color:#fff}.btn-green{background:var(--green);color:#fff}.btn-purple{background:var(--purple);color:#fff}.btn-red{background:var(--red);color:#fff}
.filter-row{display:flex;gap:8px;margin-bottom:6px;align-items:center;flex-shrink:0;flex-wrap:wrap}
.ms-dropdown{position:relative;display:inline-block;flex:1;min-width:0;max-width:320px}
#eh-ms-dropdown{max-width:none}
.ms-trigger{font-family:'Fredoka',sans-serif;font-size:.82em;font-weight:600;padding:8px 34px 8px 14px;border-radius:50px;border:2.5px solid #eee;background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%238C8C8C' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 12px center;color:var(--text-primary);outline:none;cursor:pointer;-webkit-appearance:none;appearance:none;width:100%;transition:border-color .2s,box-shadow .2s;box-shadow:var(--shadow);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ms-trigger:hover{border-color:var(--accent-light)}.ms-trigger.open{border-color:var(--accent);box-shadow:var(--shadow-hover)}
.ms-panel{display:none;position:absolute;top:calc(100% + 4px);left:0;right:0;background:var(--surface);border:2px solid var(--accent);border-radius:var(--radius-sm);box-shadow:0 8px 30px rgba(0,0,0,.15);z-index:50;max-height:280px;overflow-y:auto;animation:msFadeIn .2s ease}.ms-panel.show{display:block}
#eh-ms-panel{right:auto;min-width:100%;white-space:nowrap}
#quiz-ms-panel{right:auto;min-width:100%;white-space:nowrap}
#flash-ms-panel{right:auto;min-width:100%;white-space:nowrap}
@keyframes msFadeIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
.ms-item{display:flex;align-items:center;gap:8px;padding:8px 14px;cursor:pointer;transition:background .15s;font-size:.82em;font-family:'Nunito',sans-serif;font-weight:600;color:var(--text-primary);user-select:none;-webkit-user-select:none}
.ms-item:hover{background:#FFF5EB}.ms-item+.ms-item{border-top:1px solid #f5f0ea}
.ms-cb{width:18px;height:18px;border-radius:4px;border:2.5px solid #ccc;background:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .2s;font-size:11px;color:transparent}
.ms-item:hover .ms-cb{border-color:var(--accent-light)}.ms-item.checked .ms-cb{border-color:var(--accent);background:var(--accent);color:#fff}
.ms-item .ms-label{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ms-item .ms-count{font-size:.85em;color:var(--text-muted);flex-shrink:0;font-weight:700;margin-left:4px}
.ms-divider{height:1px;background:#eee;margin:2px 0}
.ms-hint{padding:6px 14px;font-size:.68em;color:var(--text-muted);line-height:1.4;font-family:'Nunito',sans-serif;border-top:1px solid #eee}
.list-count-bar{text-align:center;margin-bottom:4px;flex-shrink:0}.list-count-bar span{font-family:'Fredoka',sans-serif;font-size:.75em;color:var(--text-muted)}
.selection-bar{display:none;align-items:center;justify-content:space-between;gap:8px;background:linear-gradient(135deg,#FFF3E8,#FFE8D0);border:2px solid var(--accent);border-radius:var(--radius-sm);padding:8px 12px;margin-bottom:6px;flex-shrink:0;animation:fadeUp .3s ease;flex-wrap:wrap}.selection-bar.show{display:flex}.selection-bar .sel-info{font-family:'Fredoka',sans-serif;font-size:.82em;color:var(--accent-dark);font-weight:600}.selection-bar .sel-actions{display:flex;gap:6px;flex-wrap:wrap}
.word-scroll{flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;padding-bottom:16px}
.word-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:8px}
.word-card-small{background:var(--surface);border-radius:var(--radius-sm);padding:10px 10px 10px 30px;box-shadow:var(--shadow);transition:transform .2s,border-color .25s,box-shadow .25s;position:relative;overflow:hidden;border:2px solid transparent}.word-card-small:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}.word-card-small.selected{border-color:var(--accent)}
.word-card-small::before{content:'';position:absolute;top:0;left:0;width:3px;height:100%;background:var(--accent);border-radius:4px 0 0 4px}.word-card-small.selected::before{width:5px}.word-card-small:nth-child(3n+2)::before{background:var(--blue)}.word-card-small:nth-child(3n+3)::before{background:var(--green)}
.select-btn{position:absolute;top:8px;left:7px;width:18px;height:18px;border-radius:50%;border:2px solid #ddd;background:transparent;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:10px;color:transparent;transition:all .2s;z-index:2;padding:0;line-height:1}.select-btn.on{border-color:var(--accent);background:var(--accent);color:#fff}
.word-card-small .star-btn{position:absolute;top:6px;right:6px;background:none;border:none;font-size:1.05em;cursor:pointer;line-height:1;z-index:2}
.word-card-row{display:flex;align-items:center;gap:4px;flex-wrap:wrap;line-height:1.4}.word-card-row2{display:flex;align-items:baseline;justify-content:space-between;gap:6px;margin-top:3px;line-height:1.4}.word-card-row3{display:flex;align-items:center;gap:5px;flex-wrap:wrap;margin-top:4px}
.word-card-row .word-en{font-family:'Fredoka',sans-serif;font-weight:700;font-size:1em;color:var(--text-primary);display:inline-flex;align-items:center;gap:3px;cursor:pointer;transition:color .15s}.word-card-row .word-en:hover{color:var(--accent)}
.word-cn{font-size:.82em;color:var(--accent-dark);font-weight:600}.word-pos{display:inline-block;font-size:.55em;font-weight:600;background:var(--accent-light);color:var(--accent-dark);padding:1px 6px;border-radius:50px}
.word-module{display:inline-block;font-size:.55em;font-weight:600;background:var(--blue-light);color:var(--blue);padding:1px 6px;border-radius:50px}.word-level{display:inline-block;font-size:.55em;font-weight:600;background:var(--green-light);color:var(--green);padding:1px 6px;border-radius:50px}
.badge-mastered{display:inline-block;font-size:.55em;font-weight:600;background:var(--green-light);color:var(--green);padding:1px 6px;border-radius:50px}.badge-wrong{display:inline-block;font-size:.55em;font-weight:600;background:var(--red-light);color:var(--red);padding:1px 6px;border-radius:50px}
.badge-freq{display:inline-block;font-size:.55em;font-weight:600;background:#EDE7F6;color:#7C4DFF;padding:1px 6px;border-radius:50px}
.word-card-actions{margin-top:5px;display:flex;gap:3px;flex-wrap:wrap}
.gen-btn{font-family:'Fredoka',sans-serif;font-size:.6em;font-weight:600;padding:2px 7px;border-radius:50px;border:2px solid var(--purple);background:transparent;color:var(--purple);cursor:pointer;transition:all .2s}.gen-btn:hover{background:var(--purple);color:#fff}.gen-btn.analyze{border-color:var(--accent-dark);color:var(--accent-dark)}.gen-btn.analyze:hover{background:var(--accent-dark);color:#fff}
.flashcard-area{display:flex;flex-direction:column;align-items:center;gap:12px;padding:10px 0;overflow-y:auto;flex:1;min-height:0}
.flashcard-progress{font-family:'Fredoka',sans-serif;font-size:.85em;color:var(--text-muted);flex-shrink:0}.flashcard-progress strong{color:var(--accent)}
.progress-bar-wrap{width:100%;max-width:360px;height:8px;background:#f0ebe4;border-radius:10px;overflow:hidden;margin-top:4px}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--green));border-radius:10px;transition:width .5s ease}
.flashcard-wrapper{perspective:1000px;width:100%;max-width:420px;height:280px;flex-shrink:0;position:relative}
.flashcard{width:100%;height:100%;position:relative;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,0,.2,1);cursor:pointer}.flashcard.flipped{transform:rotateY(180deg)}
.flashcard-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;box-shadow:var(--shadow-hover);text-align:center}.flashcard-front{background:linear-gradient(135deg,#fff,#FFF3E8)}
.flashcard-back{background:linear-gradient(135deg,#E8F8EE,#D4F5E0);transform:rotateY(180deg);justify-content:flex-start;overflow-y:auto}
.flashcard-back-inner{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;min-height:0}
.flashcard-word{font-family:'Fredoka',sans-serif;font-size:2.2em;font-weight:700;color:var(--text-primary)}.flashcard-phonetic{font-size:.95em;color:var(--blue);margin-top:4px}
.flashcard-pos-badge{display:inline-block;font-size:.78em;font-weight:600;background:var(--accent-light);color:var(--accent-dark);padding:2px 12px;border-radius:50px;margin-top:4px}
.flashcard-syllables{font-size:.88em;color:var(--text-muted);margin-top:6px;letter-spacing:2px;font-weight:600}
.flashcard-meta-badges{display:flex;gap:6px;margin-top:6px;flex-wrap:wrap;justify-content:center}.flashcard-meta-badges .word-module{font-size:.72em;padding:2px 10px}.flashcard-meta-badges .word-level{font-size:.68em;padding:2px 10px}
.flashcard-front .flashcard-meta-badges{position:absolute;bottom:16px;left:20px;right:20px;padding-top:6px;border-top:1px dashed rgba(0,0,0,.08);display:flex;align-items:center;gap:4px}
.flashcard-hint{font-size:.78em;color:var(--text-muted);margin-top:10px;opacity:.7}
.flashcard-meaning{font-family:'Fredoka',sans-serif;font-size:2em;font-weight:700;color:var(--green);margin-bottom:8px}
.flashcard-extra{width:100%;font-size:.72em;color:var(--text-muted);line-height:1.6;text-align:left;padding:0 14px;margin-top:8px}.flashcard-extra .fe-row{margin-bottom:3px;display:flex;align-items:flex-start;gap:2px}.flashcard-extra .fe-label{font-weight:700;color:var(--text-primary);flex-shrink:0}
.flashcard-back-footer{font-size:.72em;color:var(--text-muted);margin-top:auto;padding-top:6px;border-top:1px dashed rgba(0,0,0,.08);width:100%;display:flex;align-items:center;gap:4px;font-weight:600;flex-shrink:0}
.flashcard-back-footer .gen-btn{font-size:.83em}
.flashcard-btns{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;flex-shrink:0}.flashcard-btns .btn-custom{min-width:90px;font-size:.82em;padding:10px 16px}
@keyframes cardSwipeOutLeft{from{transform:translateX(0) rotate(0);opacity:1}to{transform:translateX(-80%) rotate(-4deg);opacity:0}}
@keyframes cardSwipeInRight{from{transform:translateX(80%) rotate(4deg);opacity:0}to{transform:translateX(0) rotate(0);opacity:1}}
@keyframes cardSwipeOutRight{from{transform:translateX(0) rotate(0);opacity:1}to{transform:translateX(80%) rotate(4deg);opacity:0}}
@keyframes cardSwipeInLeft{from{transform:translateX(-80%) rotate(-4deg);opacity:0}to{transform:translateX(0) rotate(0);opacity:1}}
.flashcard.card-out-left{animation:cardSwipeOutLeft .2s ease-in forwards}.flashcard.card-in-right{animation:cardSwipeInRight .25s ease-out forwards}.flashcard.card-out-right{animation:cardSwipeOutRight .2s ease-in forwards}.flashcard.card-in-left{animation:cardSwipeInLeft .25s ease-out forwards}
.quiz-setup{background:var(--surface);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);text-align:center;overflow:visible;width:100%;display:flex;flex-direction:column;align-items:center}.quiz-setup h3{font-family:'Fredoka',sans-serif;font-size:1.1em;margin-bottom:14px}
.quiz-options{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:16px;align-items:center}
.quiz-opt{font-family:'Fredoka',sans-serif;font-size:.82em;font-weight:600;padding:8px 18px;border-radius:50px;border:2.5px solid #eee;background:#fff;color:var(--text-muted);cursor:pointer;transition:all .2s}.quiz-opt.selected{border-color:var(--accent);background:var(--accent-light);color:var(--accent-dark)}
.custom-count-wrap{display:none;align-items:center;gap:6px;justify-content:center;margin-top:-8px;margin-bottom:16px}.custom-count-wrap.show{display:flex}
.custom-count-input{font-family:'Fredoka',sans-serif;font-size:.95em;font-weight:600;width:80px;padding:8px 12px;border-radius:var(--radius-sm);border:2.5px solid var(--accent);outline:none;text-align:center}
.quiz-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;flex-shrink:0;gap:8px}.quiz-bar-left{font-family:'Fredoka',sans-serif;font-size:.82em;color:var(--text-muted)}
.quiz-timer{font-family:'Fredoka',sans-serif;font-size:.82em;color:var(--accent);font-weight:600;white-space:nowrap;min-width:60px;text-align:center}
.quiz-scroll{display:none;flex-direction:column;flex:1;min-height:0;overflow-y:auto;padding-bottom:16px}.quiz-scroll.active{display:flex}
.quiz-question-box{background:var(--surface);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);text-align:center;margin-bottom:14px}
.quiz-q-num{font-family:'Fredoka',sans-serif;font-size:.82em;color:var(--text-muted);margin-bottom:8px}
.quiz-q-word{font-family:'Fredoka',sans-serif;font-size:2em;font-weight:700;display:inline-flex;align-items:center;gap:8px}
.quiz-q-module{margin-top:6px;display:flex;gap:6px;align-items:center;flex-wrap:wrap;justify-content:center;min-height:1.2em}
.quiz-q-prompt{margin-top:10px;font-size:.85em;color:var(--text-muted)}
.quiz-choices{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:14px}
.quiz-choice{font-family:'Nunito',sans-serif;font-weight:600;font-size:.9em;padding:12px 14px;border-radius:var(--radius-sm);border:2.5px solid #eee;background:var(--surface);cursor:pointer;transition:all .2s;box-shadow:var(--shadow);text-align:center}.quiz-choice.correct{border-color:var(--green);background:var(--green-light);color:var(--green)}.quiz-choice.wrong{border-color:var(--red);background:var(--red-light);color:var(--red)}.quiz-choice.disabled{pointer-events:none;opacity:.7}
.quiz-feedback{text-align:center;font-family:'Fredoka',sans-serif;font-size:1em;font-weight:600;min-height:32px;padding:8px;border-radius:var(--radius-sm);margin-bottom:12px}.quiz-feedback.correct-fb{background:var(--green-light);color:var(--green)}.quiz-feedback.wrong-fb{background:var(--red-light);color:var(--red)}
.spelling-input-wrap{display:flex;gap:8px;justify-content:center;margin:12px 0;align-items:center}
.spelling-input{font-family:'Fredoka',sans-serif;font-size:1.1em;font-weight:600;padding:10px 16px;border-radius:var(--radius-sm);border:2.5px solid #eee;outline:none;width:200px;text-align:center}.spelling-input:focus{border-color:var(--accent)}
.quiz-result{display:none;text-align:center;animation:fadeUp .5s ease;padding:20px 0;overflow-y:auto;flex:1;min-height:0}.quiz-result.active{display:block}
.result-emoji{font-size:3em;margin-bottom:8px}.result-title{font-family:'Fredoka',sans-serif;font-size:1.4em;font-weight:700;color:var(--accent)}
.result-score{font-family:'Fredoka',sans-serif;font-size:2.4em;font-weight:700;color:var(--green);margin:8px 0}
.result-stats{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin:6px 0 10px}.result-stat-item{font-family:'Fredoka',sans-serif;font-size:1em;font-weight:600;background:var(--surface);border-radius:var(--radius-sm);padding:8px 18px;box-shadow:var(--shadow)}.result-stat-item .rsi-val{font-size:1.2em;display:block;margin-top:2px}
.result-msg{color:var(--text-muted);margin-bottom:16px;font-size:.9em}
.result-wrong-list{text-align:left;max-width:360px;margin:0 auto 16px;background:var(--red-light);border-radius:var(--radius-sm);padding:12px 16px;max-height:200px;overflow:auto}.result-wrong-list h4{font-family:'Fredoka',sans-serif;color:var(--red);margin-bottom:6px;font-size:.85em}.result-wrong-item{font-size:.82em;padding:4px 0;border-bottom:1px solid rgba(255,107,107,.15);color:#555}.result-wrong-item:last-child{border-bottom:none}.result-wrong-item strong{color:var(--text-primary)}
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:100;align-items:center;justify-content:center;padding:16px;backdrop-filter:blur(4px)}.modal-overlay.open{display:flex}
.modal-box{background:var(--bg);border-radius:var(--radius);padding:24px;max-width:560px;width:100%;max-height:80vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,.2);animation:fadeUp .3s ease}.modal-box h3{font-family:'Fredoka',sans-serif;font-size:1.2em;margin-bottom:14px}
.modal-box textarea{width:100%;height:220px;border-radius:var(--radius-sm);border:2.5px solid #eee;padding:12px;font-family:'Nunito',sans-serif;font-size:.82em;outline:none;resize:vertical;line-height:1.7}.modal-box textarea:focus{border-color:var(--accent)}
.modal-hint{font-size:.72em;color:var(--text-muted);margin-top:8px;line-height:1.5}
.modal-btns{display:flex;gap:8px;margin-top:16px;justify-content:flex-end;flex-wrap:wrap;align-items:center}.modal-btns .speak-btn{font-size:1em;padding:2px 4px}
.ai-config-row{margin-bottom:12px}.ai-config-row label{display:block;font-family:'Fredoka',sans-serif;font-size:.8em;font-weight:600;color:var(--text-muted);margin-bottom:3px}.ai-config-row input,.ai-config-row select{width:100%;font-family:'Nunito',sans-serif;font-size:.85em;padding:8px 12px;border-radius:var(--radius-sm);border:2.5px solid #eee;outline:none}.ai-config-row input:focus,.ai-config-row select:focus{border-color:var(--purple)}
.loading-dots{display:flex;gap:6px;justify-content:center;padding:30px 0}.loading-dots span{width:10px;height:10px;background:var(--purple);border-radius:50%;animation:dotBounce .6s ease infinite alternate}.loading-dots span:nth-child(2){animation-delay:.2s}.loading-dots span:nth-child(3){animation-delay:.4s}
@keyframes dotBounce{from{transform:translateY(0);opacity:.4}to{transform:translateY(-8px);opacity:1}}
#confetti-canvas{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:200}
.empty-state{text-align:center;padding:40px 16px;color:var(--text-muted)}.empty-state .emoji{font-size:2.5em;margin-bottom:8px}
.para-pair{cursor:pointer;padding:8px 10px;border-radius:10px;transition:all .2s;display:block;border-left:4px solid transparent;margin-bottom:6px;position:relative;background:var(--surface);box-shadow:0 2px 8px rgba(0,0,0,.04)}.para-pair:hover{background:#FFF8F0}.para-pair.selected{background:var(--accent-light);border-left-color:var(--accent)}
.para-pair .pair-en{font-family:'Fredoka',sans-serif;font-size:.95em;font-weight:600;color:var(--text-primary);line-height:1.6;display:flex;align-items:flex-start;gap:6px}.para-pair .pair-en .speak-btn{font-size:.95em;flex-shrink:0;margin-top:1px}
.para-pair .pair-cn{font-size:.82em;color:var(--text-muted);margin-top:3px;line-height:1.6}.para-pair.selected .pair-cn{color:var(--accent-dark)}
.para-pair .pair-check{position:absolute;bottom:8px;right:10px;font-size:.85em;opacity:0;transition:opacity .2s;color:var(--accent);font-weight:700}.para-pair:hover .pair-check,.para-pair.selected .pair-check{opacity:1}
.merged-view{padding:14px;background:var(--surface);border-radius:var(--radius-sm);box-shadow:var(--shadow)}.merged-en{font-family:'Fredoka',sans-serif;font-size:.98em;font-weight:600;line-height:1.8;color:var(--text-primary)}.merged-en strong{color:var(--accent-dark)}.merged-cn{font-size:.85em;color:var(--text-muted);line-height:1.9;margin-top:12px;padding-top:12px;border-top:1.5px dashed #eee}
details[open] #eh-detail-arrow{transform:rotate(90deg)}
#panel-eh{overflow-y:auto;-webkit-overflow-scrolling:touch}
#panel-eh>div{width:100%}
.eh-stats{display:flex;justify-content:center;gap:10px;margin-bottom:6px;flex-wrap:wrap;flex-shrink:0}
.eh-stat-item{background:var(--surface);border-radius:var(--radius-sm);padding:6px 12px;box-shadow:var(--shadow);text-align:center;min-width:65px}
.eh-stat-num{font-family:'Fredoka',sans-serif;font-size:1.1em;font-weight:700;color:var(--accent);line-height:1}
.eh-stat-item:nth-child(2) .eh-stat-num{color:var(--green)}.eh-stat-item:nth-child(3) .eh-stat-num{color:var(--purple)}
.eh-stat-label{font-size:.6em;color:var(--text-muted);margin-top:1px}
.eh-card-area{display:flex;flex-direction:column;align-items:center;gap:10px;padding-bottom:12px}
.eh-card-wrapper{perspective:1000px;width:100%;max-width:420px;height:260px;flex-shrink:0}
.eh-card{width:100%;height:100%;position:relative;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,0,.2,1);cursor:pointer}.eh-card.flipped{transform:rotateY(180deg)}
.eh-card .flashcard-front{background:linear-gradient(135deg,#fff,#EDE8FF)!important}
.simple-mode-btn{position:absolute;top:8px;left:8px;z-index:10;background:rgba(0,0,0,.2);color:#fff;border:none;border-radius:50px;padding:3px 10px;font-family:Fredoka,sans-serif;font-size:.68em;font-weight:600;cursor:pointer;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);transition:background .2s}
.simple-mode-btn.on{background:rgba(78,203,113,.6)}
.flashcard.flipped .simple-mode-btn,.eh-card.flipped .simple-mode-btn{display:none}
.eh-next-schedule{font-family:'Fredoka',sans-serif;font-size:.72em;color:var(--text-muted);flex-shrink:0;text-align:center;line-height:1.5;background:var(--surface);border-radius:var(--radius-sm);padding:6px 12px;box-shadow:var(--shadow)}
.eh-response-btns{display:grid;grid-template-columns:1fr 1fr;gap:8px;width:100%;max-width:380px;flex-shrink:0}
.btn-eh{font-family:'Fredoka',sans-serif;font-weight:600;font-size:.78em;padding:10px;border-radius:var(--radius-sm);border:2.5px solid transparent;cursor:pointer;transition:all .2s;text-align:center;line-height:1.3}
.btn-eh:active{transform:scale(.96)}
.btn-eh-forgot{background:var(--red-light);color:var(--red);border-color:var(--red)}.btn-eh-forgot:hover{background:var(--red);color:#fff}
.btn-eh-vague{background:#FFF3E0;color:#E67E22;border-color:#E67E22}.btn-eh-vague:hover{background:#E67E22;color:#fff}
.btn-eh-remember{background:var(--green-light);color:var(--green);border-color:var(--green)}.btn-eh-remember:hover{background:var(--green);color:#fff}
.btn-eh-mastered{background:var(--blue-light);color:var(--blue);border-color:var(--blue)}.btn-eh-mastered:hover{background:var(--blue);color:#fff}
.eh-result{text-align:center;animation:fadeUp .5s ease;padding:20px 0}
.eh-result .result-wrong-list{background:var(--accent-light)}.eh-result .result-wrong-list h4{color:var(--accent-dark)}.eh-result .result-wrong-item{border-bottom-color:rgba(224,107,31,.15)}
.word-editor-tabs{display:flex;gap:4px;margin-bottom:10px;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding-bottom:4px}.word-editor-tabs::-webkit-scrollbar{display:none}
.word-editor-tab{font-family:'Fredoka',sans-serif;font-size:.75em;font-weight:600;padding:6px 12px;border-radius:50px;border:2px solid #eee;background:var(--surface);color:var(--text-muted);cursor:pointer;transition:all .2s;white-space:nowrap;flex-shrink:0;position:relative;display:inline-flex;align-items:center;gap:4px}
.word-editor-tab.active{border-color:var(--accent);background:var(--accent-light);color:var(--accent-dark)}
.word-editor-tab .tab-close{font-size:.9em;opacity:.5;margin-left:2px;line-height:1}.word-editor-tab .tab-close:hover{opacity:1}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeDown{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}

.auth-mode-opt {
    flex:1;text-align:center;padding:8px 6px;border-radius:10px;
    border:2px solid #ddd;background:var(--surface);cursor:pointer;
    font-family:'Fredoka',sans-serif;font-size:.78em;font-weight:600;
    color:var(--text-muted);transition:all .2s;user-select:none;-webkit-user-select:none;
}
.auth-mode-opt.selected[data-mode="cookie"] {
    border-color:var(--green);background:var(--green-light);color:var(--green);
}
.auth-mode-opt.selected[data-mode="legacy"] {
    border-color:var(--accent);background:var(--accent-light);color:var(--accent-dark);
}
body.dark-mode .auth-mode-opt { border-color:#3a3a5a;background:var(--surface); }
body.dark-mode .auth-mode-opt.selected[data-mode="cookie"] { border-color:var(--green);background:rgba(94,217,132,.12); }
body.dark-mode .auth-mode-opt.selected[data-mode="legacy"] { border-color:var(--accent);background:rgba(255,159,90,.12); }

body.dark-mode{--bg:#12122a;--surface:#1e1e3a;--accent:#ff9f5a;--accent-light:#3d2a15;--accent-dark:#ffb87a;--green:#5ed984;--green-light:#152e1a;--red:#ff7b7b;--red-light:#2e1515;--blue:#7bb5e5;--blue-light:#15253d;--purple:#b88ae8;--text-primary:#e0e0ee;--text-muted:#7a7a9e;--shadow:0 4px 20px rgba(0,0,0,.35);--shadow-hover:0 8px 30px rgba(0,0,0,.45)}
body.dark-mode{background:var(--bg);color:var(--text-primary)}
body.dark-mode .voice-bar select,body.dark-mode .quiz-opt,body.dark-mode .ms-trigger,body.dark-mode .ai-lookup-btn{background:var(--surface);border-color:#3a3a5a;color:var(--text-primary)}
body.dark-mode input[type=text],body.dark-mode input[type=password],body.dark-mode input[type=number],body.dark-mode textarea,body.dark-mode select,body.dark-mode .search-box,body.dark-mode .spelling-input,body.dark-mode .custom-count-input{background:var(--surface)!important;color:var(--text-primary)!important;border-color:#3a3a5a!important}
body.dark-mode input:focus,body.dark-mode textarea:focus,body.dark-mode select:focus{border-color:var(--accent)!important}
body.dark-mode .ms-panel{background:var(--surface);border-color:var(--accent)}
body.dark-mode .ms-item:hover{background:#2a2a4a}
body.dark-mode .ms-item+.ms-item{border-top-color:#3a3a5a}
body.dark-mode .ms-divider,body.dark-mode .ms-hint{border-top-color:#3a3a5a;background:#3a3a5a}
body.dark-mode .ms-cb{border-color:#3a3a5a;background:var(--surface)}
body.dark-mode .ms-item:hover .ms-cb{border-color:var(--accent-light)}
body.dark-mode .quiz-opt.selected{border-color:var(--accent);background:rgba(255,159,90,.18)}
body.dark-mode .quiz-choice{background:var(--surface);border-color:#3a3a5a;color:var(--text-primary)}
body.dark-mode .flashcard-front{background:linear-gradient(135deg,#1e1e3a,#252545)!important}
body.dark-mode .flashcard-back{background:linear-gradient(135deg,#152e1a,#1a3520)!important}
body.dark-mode .eh-card .flashcard-front{background:linear-gradient(135deg,#1e1e3a,#252540)!important}
body.dark-mode .flashcard-back-footer{border-top-color:rgba(255,255,255,.08)}
body.dark-mode .flashcard-front .flashcard-meta-badges{border-top-color:rgba(255,255,255,.08)}
body.dark-mode .flashcard-hint{color:var(--text-muted)}
body.dark-mode .progress-bar-wrap{background:#2a2a4a}
body.dark-mode .modal-box{background:#161630}
body.dark-mode .modal-overlay{background:rgba(0,0,0,.6)}
body.dark-mode hr{border-top-color:#3a3a5a!important}
body.dark-mode .merged-cn{border-top-color:#3a3a5a}
body.dark-mode .para-pair:hover{background:#252545}
body.dark-mode .select-btn{border-color:#3a3a5a}
body.dark-mode .search-clear-btn{background:#3a3a5a}
body.dark-mode .search-clear-btn:hover{background:#4a4a6a}
body.dark-mode .result-wrong-list{background:var(--red-light)}
body.dark-mode .result-wrong-item{border-bottom-color:rgba(255,123,123,.1);color:#999}
body.dark-mode .result-wrong-item strong{color:var(--text-primary)}
body.dark-mode .eh-result .result-wrong-list{background:var(--accent-light)}
body.dark-mode .eh-result .result-wrong-item{border-bottom-color:rgba(255,159,90,.1)}
body.dark-mode .selection-bar{background:linear-gradient(135deg,#2d2015,#3d2a15);border-color:var(--accent)}
body.dark-mode details{background:var(--bg);border-color:#3a3a5a}
body.dark-mode .btn-custom[style*="#eee"]{background:#3a3a5a!important;color:#999!important}
body.dark-mode .icon-btn{border-color:#3a3a5a}
body.dark-mode .btn-eh-vague{background:#2e2510;color:#E67E22;border-color:#E67E22}
body.dark-mode .word-editor-tab{background:var(--surface);border-color:#3a3a5a;color:var(--text-muted)}
body.dark-mode .word-editor-tab.active{border-color:var(--accent);background:rgba(255,159,90,.15);color:var(--accent-dark)}
body.dark-mode .badge-freq{background:#2a2050;color:#b388ff}
.ms-group{background:rgba(255,140,66,.04);border-left:3px solid var(--accent)}
.ms-group .ms-label{font-weight:700}
body.dark-mode .ms-group{background:rgba(255,159,90,.06)}
@media(min-width:501px){.app-container{padding:20px}.app-header{padding:20px 0 12px}.app-header h1{font-size:2.2em}.stats-bar{margin:10px 0 8px;gap:20px}.stat-item{padding:10px 18px;min-width:85px}.stat-num{font-size:1.5em}.stat-label{font-size:.75em}.nav-tabs{margin-bottom:16px;gap:8px}.nav-tab{font-size:.95em;padding:10px 24px}.voice-bar{padding:14px 18px;margin-bottom:12px;gap:10px}.voice-bar label{font-size:.85em}.voice-bar select{font-size:.88em;padding:8px 14px;max-width:110px}.voice-bar input[type=range]{width:70px}.voice-bar .speed-val{font-size:.8em}.icon-btn{font-size:.85em;padding:8px 14px}.word-list-controls{gap:8px;margin-bottom:12px}.search-box{font-size:.95em;padding:12px 18px;padding-right:36px}.ai-lookup-btn{font-size:.82em;padding:8px 14px}.ai-lookup-btn .cap{width:28px;height:17px;font-size:11px;border-radius:8.5px}.search-clear-btn{width:22px;height:22px;font-size:14px;right:10px}.ms-dropdown{max-width:360px}.ms-trigger{font-size:.88em;padding:10px 36px 10px 16px}.ms-item{padding:10px 16px;font-size:.88em}.ms-cb{width:20px;height:20px}.list-count-bar{margin-bottom:8px}.list-count-bar span{font-size:.85em}.word-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}.word-card-small{padding:14px 14px 14px 34px}.word-card-row .word-en{font-size:1.1em}.word-pos{font-size:.6em}.word-module{font-size:.6em}.word-level{font-size:.6em}.badge-mastered{font-size:.6em}.badge-wrong{font-size:.6em}.badge-freq{font-size:.6em}.word-cn{font-size:.9em}.word-card-small .star-btn{top:10px;right:10px;font-size:1.2em}.select-btn{top:10px;left:9px;width:20px;height:20px;font-size:11px}.word-card-actions{margin-top:8px}.gen-btn{font-size:.68em;padding:3px 9px}.flashcard-area{gap:20px;padding:20px 0}.flashcard-wrapper{height:360px;max-width:460px}.flashcard-word{font-size:2.8em}.flashcard-phonetic{font-size:1.1em}.flashcard-syllables{font-size:1em}.flashcard-hint{font-size:.85em;margin-top:16px}.flashcard-meaning{font-size:2.2em}.flashcard-extra{font-size:.8em}.flashcard-btns .btn-custom{min-width:120px;font-size:.9em;padding:12px 22px}.quiz-q-word{font-size:2.5em}.quiz-choices{gap:12px}.quiz-choice{font-size:1.05em;padding:16px 20px}.quiz-feedback{font-size:1.2em;min-height:40px;padding:10px}.result-stat-item{font-size:1.1em;padding:10px 22px}.result-stat-item .rsi-val{font-size:1.3em}.modal-box{max-width:600px}.modal-box textarea{height:260px;font-size:.85em}.eh-stats{gap:20px}.eh-stat-item{padding:10px 18px;min-width:85px}.eh-stat-num{font-size:1.5em}.eh-stat-label{font-size:.75em}.eh-card-area{gap:16px;padding-bottom:20px}.eh-card-wrapper{height:340px;max-width:460px}.eh-response-btns{max-width:460px;gap:12px}.btn-eh{font-size:.88em;padding:14px}.eh-next-schedule{font-size:.8em;padding:8px 16px}.eh-card-area .flashcard-word{font-size:2.8em}.eh-card-area .flashcard-phonetic{font-size:1.1em}}
.icon-btn.cyan { background: #0891b2; color: #fff; }
.icon-btn.cyan:hover { background: #06b6d4; }

@media (min-width: 600px) {
    #splash-screen img {
        width: 280px !important;
        height: 280px !important;
    }
    #splash-screen div:nth-child(2) {
        font-size: 40px !important;
    }
    #splash-screen div:nth-child(3) {
        font-size: 22px !important;
    }
}

@keyframes slideDown {
    from { opacity: 0; max-height: 0; transform: translateY(-8px); }
    to   { opacity: 1; max-height: 120px; transform: translateY(0); }
}

.modal-close-btn{position:absolute;top:12px;right:12px;width:32px;height:32px;border-radius:50%;border:none;background:rgba(0,0,0,.15);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);font-size:18px;line-height:1;color:#666;cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:10;transition:background .2s}.modal-close-btn:hover{background:rgba(0,0,0,.25)}
body.dark-mode .modal-close-btn{color:#aaa;background:rgba(255,255,255,.15)}body.dark-mode .modal-close-btn:hover{background:rgba(255,255,255,.25)}