*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
:root{--green:#00873E;--green-light:#00A854;--green-dark:#005A2B;--green-bg:#E8F5E9;--red:#E53935;--gold:#FFB300;--bg:#F5F7FA;--card:#FFFFFF;--text:#1A2332;--text-light:#6B7A8D;--border:#E2E8F0;--shadow:0 2px 16px rgba(0,0,0,0.06);--shadow-lg:0 8px 32px rgba(0,0,0,0.1);--radius:16px;--radius-sm:10px;--safe-bottom:env(safe-area-inset-bottom,0px)}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100dvh;overflow-x:hidden}
#app{max-width:480px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column}

/* Auth */
.auth-page{background:linear-gradient(160deg,#006600 0%,#004400 40%,#002200 100%);display:flex;align-items:center;justify-content:center;min-height:100dvh;padding:20px}
.auth-container{width:100%;max-width:400px}
.auth-card{background:var(--card);border-radius:24px;padding:40px 28px;box-shadow:var(--shadow-lg);text-align:center}
.auth-flag{font-size:64px;margin-bottom:8px}
.auth-card h1{font-size:1.4em;font-weight:800;color:var(--green-dark);margin-bottom:4px}
.auth-subtitle{color:var(--text-light);font-size:14px;margin-bottom:28px}
.auth-form{display:flex;flex-direction:column;gap:16px}
.form-group{display:flex;flex-direction:column;gap:6px;text-align:left}
.form-group label{font-size:13px;font-weight:600;color:var(--text-light)}
.form-group input{padding:14px 16px;border:2px solid var(--border);border-radius:var(--radius-sm);font-size:16px;font-family:inherit;transition:border-color .2s}
.form-group input:focus{outline:none;border-color:var(--green)}
.form-error{background:#FEE;border:1px solid #FCC;color:var(--red);padding:10px;border-radius:var(--radius-sm);font-size:13px;text-align:center}
.auth-btn{padding:16px;border:none;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--green),var(--green-light));color:#fff;font-size:16px;font-weight:700;cursor:pointer;transition:transform .2s;box-shadow:0 4px 16px rgba(0,135,62,.3)}
.auth-btn:active{transform:scale(.97)}
.auth-footer{text-align:center;margin-top:24px;color:rgba(255,255,255,.7);font-size:13px}

/* Header */
header{background:linear-gradient(135deg,var(--green),var(--green-dark));color:#fff;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(0,135,62,.25)}
.header-left{display:flex;align-items:center;gap:8px}
.header-flag{font-size:28px}
.header-left h1{font-size:1.1em;font-weight:700}
.header-right{display:flex;align-items:center;gap:10px}
.user-points-badge{display:flex;align-items:center;gap:4px;background:rgba(255,255,255,.2);border-radius:20px;padding:4px 12px;font-size:14px;font-weight:700}
.user-avatar{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer}

/* Bottom Nav */
#bottom-nav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:480px;display:flex;background:var(--card);border-top:1px solid var(--border);padding-bottom:var(--safe-bottom);z-index:100;box-shadow:0 -2px 12px rgba(0,0,0,.08)}
.nav-btn{flex:1;display:flex;flex-direction:column;align-items:center;padding:6px 2px;border:none;background:none;cursor:pointer;color:var(--text-light);transition:all .2s;font-size:9px}
.nav-btn.active{color:var(--green);font-weight:700}
.nav-icon{font-size:18px;margin-bottom:1px}
.nav-label{font-size:9px;line-height:1}

/* Main */
main{flex:1;padding:16px;padding-bottom:80px}
.tab{display:none;animation:fadeIn .2s ease}
.tab.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}

/* Dashboard */
.dashboard-welcome{margin-bottom:20px}
.dashboard-welcome h2{font-size:1.3em;font-weight:800;color:var(--green-dark)}
.dashboard-welcome p{color:var(--text-light);font-size:14px}
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:20px}
.stat-card{background:var(--card);border-radius:var(--radius);padding:16px;text-align:center;box-shadow:var(--shadow);position:relative;overflow:hidden}
.stat-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px}
.stat-points::before{background:var(--gold)}
.stat-streak::before{background:var(--red)}
.stat-today::before{background:var(--green)}
.stat-exercises::before{background:#7C4DFF}
.stat-icon{font-size:24px;margin-bottom:4px}
.stat-value{font-size:28px;font-weight:900;color:var(--text)}
.stat-label{font-size:11px;color:var(--text-light);font-weight:500}
.dash-section{margin-bottom:20px}
.dash-section h3{font-size:15px;font-weight:700;color:var(--text);margin-bottom:10px}
.daily-exercise-card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);text-align:center}
.daily-exercise-card p{color:var(--text-light);font-size:14px}

/* Leaderboard */
.leaderboard{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.lb-row{display:flex;align-items:center;padding:12px 16px;border-bottom:1px solid var(--border);gap:10px}
.lb-row:last-child{border-bottom:none}
.lb-me{background:var(--green-bg)}
.lb-rank{font-size:18px;width:32px;text-align:center}
.lb-avatar{font-size:20px}
.lb-name{flex:1;font-weight:600;font-size:14px}
.lb-points{font-weight:700;color:var(--green);font-size:13px}
.empty-state{text-align:center;color:var(--text-light);padding:20px;font-size:14px}

/* History Chart */
.chart-bars{display:flex;gap:6px;align-items:flex-end;height:120px;padding:10px;background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow)}
.chart-col{flex:1;display:flex;flex-direction:column;align-items:center;height:100%}
.chart-bar{width:100%;background:linear-gradient(180deg,var(--green),var(--green-light));border-radius:6px 6px 0 0;margin-top:auto;min-height:4px;transition:height .5s}
.chart-label{font-size:10px;color:var(--text-light);margin-top:4px}
.chart-val{font-size:10px;font-weight:700;color:var(--green)}

/* Translator */
.translator-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.lang-selector{display:flex;align-items:center;padding:12px;background:linear-gradient(135deg,var(--green),var(--green-light));color:#fff}
.lang-btn{flex:1;padding:10px;border:2px solid rgba(255,255,255,.3);border-radius:var(--radius-sm);background:rgba(255,255,255,.15);color:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s}
.lang-btn:active{transform:scale(.95)}
.swap-btn{width:44px;height:44px;border-radius:50%;border:none;background:var(--gold);color:var(--green-dark);font-size:20px;font-weight:900;cursor:pointer;margin:0 8px;transition:transform .3s;box-shadow:0 2px 8px rgba(0,0,0,.2)}
.swap-btn:active{transform:rotate(180deg) scale(.9)}
.translator-body{padding:16px}
.input-group{position:relative;margin-bottom:12px}
textarea,.output-area{width:100%;padding:14px;padding-right:50px;border:2px solid var(--border);border-radius:var(--radius-sm);font-size:16px;font-family:inherit;resize:none;transition:border-color .2s;background:#FAFBFC}
textarea:focus,.output-area:focus{outline:none;border-color:var(--green)}
.output-area{min-height:80px;background:#F0FFF4;cursor:pointer}
.output-group{margin-bottom:0}
.input-actions{position:absolute;right:8px;top:8px;display:flex;flex-direction:column;gap:4px}
.icon-btn{width:36px;height:36px;border:none;border-radius:var(--radius-sm);background:rgba(0,135,62,.1);cursor:pointer;font-size:16px;display:flex;align-items:center;justify-content:center;transition:all .2s}
.icon-btn:active{background:var(--green);color:#fff;transform:scale(.9)}

/* Buttons */
.primary-btn{width:100%;padding:14px;border:none;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--green),var(--green-light));color:#fff;font-size:16px;font-weight:700;cursor:pointer;transition:all .2s;margin-bottom:12px;box-shadow:0 4px 12px rgba(0,135,62,.2)}
.primary-btn:active{transform:scale(.97)}
.secondary-btn{padding:12px 24px;border:2px solid var(--green);border-radius:var(--radius-sm);background:#fff;color:var(--green);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;margin-top:16px;display:block;width:100%}
.secondary-btn:active{background:var(--green);color:#fff}

/* Category Tabs */
.category-tabs{display:flex;gap:8px;overflow-x:auto;padding-bottom:12px;margin-bottom:16px;scrollbar-width:none}
.category-tabs::-webkit-scrollbar{display:none}
.cat-tab{padding:8px 16px;border-radius:20px;border:2px solid var(--border);background:#fff;color:var(--text);font-size:13px;font-weight:500;white-space:nowrap;cursor:pointer;transition:all .2s}
.cat-tab.active{background:var(--green);color:#fff;border-color:var(--green)}

/* Phrase Cards */
.card-list{display:flex;flex-direction:column;gap:12px}
.phrase-card{background:var(--card);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);transition:transform .2s}
.phrase-card:active{transform:scale(.98)}
.phrase-pt{font-size:18px;font-weight:700;color:var(--green-dark);margin-bottom:4px}
.phrase-fr{font-size:15px;color:var(--text-light);margin-bottom:10px}
.phonetic{font-size:12px;color:var(--text-light);font-style:italic;background:var(--green-bg);padding:3px 8px;border-radius:6px;display:inline-block;margin-bottom:8px}
.phrase-actions{display:flex;gap:6px;flex-wrap:wrap}
.phrase-actions button{padding:7px 12px;border:none;border-radius:8px;font-size:12px;font-weight:500;cursor:pointer;transition:all .2s}
.btn-listen{background:var(--green);color:#fff}
.btn-listen:active{transform:scale(.9)}
.btn-slow{background:var(--gold);color:var(--green-dark)}
.btn-favorite{background:#FEE;color:var(--red)}
.btn-favorite.active{background:var(--red);color:#fff}

/* Games */
h2{text-align:center;margin-bottom:20px;color:var(--green-dark);font-size:1.2em}
.game-menu{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.game-card{background:var(--card);border-radius:var(--radius);padding:20px 12px;text-align:center;box-shadow:var(--shadow);cursor:pointer;transition:all .2s;border:2px solid transparent}
.game-card:active{transform:scale(.95);border-color:var(--green)}
.game-emoji{font-size:36px;margin-bottom:8px}
.game-card h3{font-size:14px;margin-bottom:4px;color:var(--green-dark)}
.game-card p{font-size:11px;color:var(--text-light)}

/* Game Area */
#game-area,#exercise-area{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-top:16px;min-height:280px}
.hidden{display:none !important}
.game-header{text-align:center;margin-bottom:16px}
.game-score{display:flex;justify-content:center;gap:20px;margin-bottom:12px}
.score-item{text-align:center}
.score-value{font-size:28px;font-weight:900;color:var(--green)}
.score-label{font-size:11px;color:var(--text-light)}
.quiz-sentence{font-size:20px;font-weight:700;color:var(--green);margin:16px auto;text-align:center;cursor:pointer;padding:12px;background:var(--green-bg);border-radius:var(--radius-sm)}

/* Option Buttons */
.color-options,.animal-options,.number-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.option-btn{padding:16px;border:3px solid var(--border);border-radius:var(--radius);background:#fff;font-size:15px;font-weight:600;cursor:pointer;transition:all .2s;text-align:center}
.option-btn:active{transform:scale(.95)}
.option-btn.correct{border-color:var(--green);background:#E8F5E9;animation:correctPulse .5s}
.option-btn.wrong{border-color:var(--red);background:#FFEBEE;animation:shake .4s}
@keyframes correctPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.05)}}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-8px)}75%{transform:translateX(8px)}}

/* Memory */
.memory-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.memory-card{aspect-ratio:1;border:3px solid var(--border);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;cursor:pointer;transition:all .3s;background:linear-gradient(135deg,var(--green),var(--green-light));color:#fff}
.memory-card.flipped{background:#fff;color:var(--text);border-color:var(--green)}
.memory-card.matched{background:var(--gold);color:var(--green-dark);border-color:var(--gold);pointer-events:none}

/* Drag & Drop */
.drag-items{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:20px}
.drag-item{padding:10px 18px;background:var(--green);color:#fff;border-radius:var(--radius-sm);font-weight:600;cursor:pointer;transition:all .2s;user-select:none;-webkit-user-select:none}
.drag-item:active{transform:scale(.95)}
.drop-zone{min-height:50px;border:3px dashed var(--border);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;margin-bottom:12px;padding:12px;transition:all .2s}
.drop-zone-label{font-size:14px;font-weight:600;color:var(--text);margin-bottom:8px}
.drop-zone-word{font-size:14px;font-weight:600;color:var(--text-light)}
.dropped-word{padding:8px 16px;background:var(--green);color:#fff;border-radius:var(--radius-sm);font-weight:600}

/* Exercises */
.exercise-hint{text-align:center;color:var(--text-light);margin-bottom:12px;font-size:14px}
.exercise-question{font-size:22px;font-weight:700;text-align:center;margin-bottom:16px;color:var(--green-dark)}
.fill-options{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:16px}
.fill-word{padding:10px 16px;border:2px solid var(--border);border-radius:var(--radius-sm);background:#fff;font-size:15px;cursor:pointer;transition:all .2s}
.fill-word:active{transform:scale(.95)}
.fill-blank{display:inline-block;min-width:80px;padding:4px 10px;border-bottom:3px solid var(--green);font-weight:700;color:var(--green);margin:0 4px}
.fill-blank.correct-blank{background:#E8F5E9;border-radius:6px}
.fill-blank.wrong-blank{background:#FFEBEE;border-color:var(--red)}
.exercise-input{width:100%;padding:14px;border:2px solid var(--border);border-radius:var(--radius-sm);font-size:18px;text-align:center;font-family:inherit;margin-top:12px;transition:border-color .2s}
.exercise-input:focus{outline:none;border-color:var(--green)}

/* Vocab */
.vocab-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.vocab-card{background:var(--card);border-radius:var(--radius);padding:16px;text-align:center;box-shadow:var(--shadow);cursor:pointer;transition:all .2s}
.vocab-card:active{transform:scale(.95)}
.vocab-word{font-size:16px;font-weight:700;color:var(--green-dark);margin-bottom:4px}
.vocab-translation{font-size:13px;color:var(--text-light);margin-bottom:8px}
.vocab-emoji{font-size:30px}

/* Progress Bar */
.progress-bar{width:100%;height:6px;background:var(--border);border-radius:3px;margin:10px 0;overflow:hidden}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--green),var(--gold));border-radius:3px;transition:width .5s ease}

/* Admin */
.admin-section{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:16px}
.admin-section h3{font-size:16px;font-weight:700;color:var(--green-dark);margin-bottom:12px}
.admin-form{display:flex;flex-direction:column;gap:12px}
.admin-form input,.admin-form select{padding:12px;border:2px solid var(--border);border-radius:var(--radius-sm);font-size:15px;font-family:inherit}
.admin-form input:focus,.admin-form select:focus{outline:none;border-color:var(--green)}
.admin-users{display:flex;flex-direction:column;gap:8px}
.admin-user-card{display:flex;align-items:center;justify-content:space-between;padding:12px;background:var(--bg);border-radius:var(--radius-sm);gap:8px}
.admin-user-info{display:flex;align-items:center;gap:10px}
.admin-avatar{font-size:24px}
.admin-user-info strong{font-size:14px;display:block}
.admin-user-info small{color:var(--text-light);font-size:12px}
.admin-user-actions{display:flex;align-items:center;gap:8px}
.admin-points{font-size:13px;font-weight:700;color:var(--green)}
.admin-btn-toggle{padding:6px 10px;border:none;border-radius:6px;background:var(--green-bg);color:var(--green);font-size:11px;font-weight:600;cursor:pointer}
.admin-btn-delete{padding:6px 8px;border:none;border-radius:6px;background:#FFEBEE;color:var(--red);font-size:14px;cursor:pointer}

/* Toast */
.toast{position:fixed;bottom:100px;left:50%;transform:translateX(-50%);padding:12px 24px;border-radius:12px;background:var(--green-dark);color:#fff;font-weight:600;font-size:14px;z-index:1000;box-shadow:0 4px 16px rgba(0,0,0,.3);animation:toastIn .3s ease;white-space:nowrap}
@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(20px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}

/* Celebration */
.celebration{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:999}
.confetti{position:absolute;width:10px;height:10px;border-radius:2px;animation:confettiFall 2s ease forwards}
@keyframes confettiFall{0%{transform:translateY(-20px) rotate(0);opacity:1}100%{transform:translateY(100vh) rotate(720deg);opacity:0}}

@media(max-width:380px){.game-menu{grid-template-columns:1fr}.vocab-grid{grid-template-columns:1fr}}

/* Scramble Game */
.scramble-display{display:flex;gap:8px;justify-content:center;margin:16px 0}
.scramble-letter{width:48px;height:56px;border:3px solid var(--green);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:900;color:var(--green-dark);background:var(--green-bg);animation:letterPop .3s ease}
@keyframes letterPop{from{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}
.scramble-input{text-align:center;font-size:22px;font-weight:700;letter-spacing:2px}

/* Bingo Game */
.bingo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}
.bingo-card{padding:16px 8px;border:3px solid var(--border);border-radius:var(--radius);background:#fff;cursor:pointer;transition:all .2s;text-align:center;display:flex;flex-direction:column;align-items:center;gap:6px}
.bingo-card:active{transform:scale(.95);border-color:var(--green)}
.bingo-card.correct{border-color:var(--green);background:#E8F5E9;animation:correctPulse .5s}
.bingo-card.wrong{border-color:var(--red);background:#FFEBEE;animation:shake .4s}
.bingo-emoji{font-size:32px}
.bingo-word{font-size:13px;font-weight:700;color:var(--text)}
.bingo-listen-btn{background:linear-gradient(135deg,var(--green),var(--green-light));color:#fff;border:none;cursor:pointer;box-shadow:0 4px 16px rgba(0,135,62,.3);transition:all .2s}
.bingo-listen-btn:active{transform:scale(.9);box-shadow:0 2px 8px rgba(0,135,62,.2)}

/* Catch Words Game */
.catch-zone{position:relative;width:100%;height:400px;border:3px dashed var(--border);border-radius:var(--radius);overflow:hidden;background:linear-gradient(180deg,#E8F5E9 0%,#fff 100%)}
.catch-word{position:absolute;top:-60px;display:flex;align-items:center;gap:6px;padding:10px 16px;background:var(--green);color:#fff;border-radius:var(--radius-sm);font-weight:700;font-size:16px;cursor:pointer;transition:all .3s;animation:catchFall 3s linear forwards;z-index:10}
.catch-word:active{transform:scale(1.1)}
.catch-word.caught{background:var(--gold);color:var(--green-dark);animation:none;transform:scale(1.2);opacity:0;transition:all .3s}
.catch-word.missed-word{background:var(--red);opacity:0.5;animation:none}
.catch-emoji{font-size:24px}
.catch-text{font-size:16px}
@keyframes catchFall{0%{top:-60px}100%{top:420px}}

/* Riddle Game */
.riddle-card{background:linear-gradient(135deg,var(--green-bg),#fff);border:2px solid var(--green);border-radius:var(--radius);padding:20px;margin:16px 0;text-align:center}
.riddle-text{font-size:18px;font-weight:700;color:var(--green-dark);line-height:1.4}
.riddle-fr{margin-top:8px}
.riddle-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.riddle-opt{padding:14px;border:3px solid var(--border);border-radius:var(--radius);background:#fff;font-size:15px;font-weight:600;cursor:pointer;transition:all .2s;text-align:center}
.riddle-opt:active{transform:scale(.95)}
.riddle-opt.correct{border-color:var(--green);background:#E8F5E9;animation:correctPulse .5s}
.riddle-opt.wrong{border-color:var(--red);background:#FFEBEE;animation:shake .4s}