:root{
  --pink:#E85D8C;--blue:#4A9EF5;--purple:#8B5CF6;--orange:#F59E0B;--teal:#14B8A6;
  --bg:#FFF9F3;--card:#FFFFFF;--text:#3D3D4E;--muted:#A0A0B8;
  --shadow-sm:0 2px 8px rgba(0,0,0,0.06);--shadow-md:0 8px 24px rgba(0,0,0,0.08);--shadow-lg:0 16px 48px rgba(0,0,0,0.12);
}
html,body{background:var(--bg);font-family:'Nunito',sans-serif;min-height:100vh;overflow-x:hidden;-webkit-tap-highlight-color:transparent;color:var(--text)}
canvas#ptx{position:fixed;inset:0;pointer-events:none;z-index:99}
#app{max-width:680px;margin:0 auto;padding:16px 14px 24px;position:relative}

/* TOP BAR */
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.logo{font-family:'Fredoka',cursive;font-size:26px;font-weight:700;color:var(--pink);letter-spacing:-0.5px;line-height:1;margin:0}
.logo .dot{display:inline-block;width:8px;height:8px;background:var(--orange);border-radius:50%;margin-left:2px;vertical-align:super;animation:logoPulse 2s ease-in-out infinite}
@keyframes logoPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.3)}}
.nav-inner{max-width:960px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:60px}
.nav-links{display:flex;gap:22px;list-style:none}
@media(max-width:760px){.nav-links{display:none}}
.top-icons{display:flex;gap:6px;align-items:center}
.stat-row{display:flex;gap:8px}
.stat{background:var(--card);border-radius:14px;padding:6px 14px;text-align:center;box-shadow:var(--shadow-sm);border:1.5px solid rgba(0,0,0,0.04);min-width:52px}
.stat-v{font-family:'Fredoka',cursive;font-size:20px;font-weight:700;color:var(--pink);line-height:1.1;transition:transform 0.2s cubic-bezier(.34,1.56,.64,1)}
.stat-v.pop-anim{transform:scale(1.25)}
.stat-v.blue{color:var(--blue)}
.stat-l{font-size:9px;color:var(--muted);text-transform:uppercase;letter-spacing:1.2px;font-weight:800}

/* XP BAR */
.xp-bar-wrap{display:flex;align-items:center;gap:8px;margin-bottom:10px;padding:0 2px}
.xp-level-badge{font-family:'Fredoka',cursive;font-size:13px;font-weight:700;color:#fff;background:var(--purple);border-radius:20px;padding:2px 10px;white-space:nowrap;min-width:46px;text-align:center;cursor:pointer;transition:transform 0.15s}
.xp-level-badge:hover{transform:scale(1.05)}
.xp-bar-bg{flex:1;height:8px;background:#F0E8F8;border-radius:4px;overflow:hidden}
.xp-bar-fill{height:100%;background:linear-gradient(90deg,var(--purple),var(--blue));border-radius:4px;transition:width 0.6s cubic-bezier(.34,1.56,.64,1)}
.xp-title{font-size:11px;font-weight:800;color:var(--muted);white-space:nowrap}
.xp-gain-toast{position:fixed;z-index:210;font-family:'Fredoka',cursive;font-size:16px;font-weight:700;color:var(--purple);pointer-events:none;animation:popUp 1.2s ease-out forwards}

/* LEVEL UP OVERLAY */
.lvlup-overlay{position:fixed;inset:0;background:rgba(139,92,246,0.18);backdrop-filter:blur(6px);z-index:350;display:flex;align-items:center;justify-content:center;animation:fadeIn 0.3s ease}
.lvlup-card{background:linear-gradient(135deg,#8B5CF6,#4A9EF5);border-radius:28px;padding:36px 28px;text-align:center;color:#fff;box-shadow:0 20px 60px rgba(139,92,246,0.4);animation:modalIn 0.5s cubic-bezier(.34,1.56,.64,1)}
.lvlup-card .lv-icon{font-size:64px;margin-bottom:8px;animation:achBounce 0.6s cubic-bezier(.34,1.56,.64,1)}
.lvlup-card h2{font-family:'Fredoka',cursive;font-size:32px;font-weight:700;margin-bottom:4px}
.lvlup-card .lv-sub{font-size:14px;opacity:0.85;margin-bottom:16px}
.lvlup-card .lv-title{font-family:'Fredoka',cursive;font-size:20px;font-weight:700;background:rgba(255,255,255,0.25);border-radius:20px;padding:6px 20px;display:inline-block;margin-bottom:20px}
.lvlup-card button{background:#fff;color:var(--purple);border:none;border-radius:16px;padding:10px 32px;font-family:'Nunito',sans-serif;font-weight:800;font-size:15px;cursor:pointer}

/* STREAK BANNER */
.streak-banner{background:linear-gradient(135deg,#FFF7ED,#FEF3C7);border:1.5px solid #FDE68A;border-radius:14px;padding:8px 16px;margin-bottom:12px;display:flex;align-items:center;gap:10px;box-shadow:var(--shadow-sm)}
.streak-fire{font-size:24px;animation:fireWiggle 1s ease-in-out infinite}
@keyframes fireWiggle{0%,100%{transform:rotate(-5deg)}50%{transform:rotate(5deg)}}
.streak-info{flex:1}
.streak-days{font-family:'Fredoka',cursive;font-size:18px;font-weight:700;color:var(--orange)}
.streak-sub{font-size:11px;color:var(--muted);font-weight:700}
.streak-cal{display:flex;gap:4px}
.streak-dot{width:16px;height:16px;border-radius:4px;background:#F0E8F8;font-size:8px;display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--muted)}
.streak-dot.done{background:var(--teal);color:#fff}
.streak-dot.today{border:2px solid var(--orange)}

/* GRADE BUTTONS */
.grade-wrap{margin-bottom:12px}
.grade-label{font-size:11px;color:var(--muted);font-weight:800;margin-bottom:6px;letter-spacing:0.5px}
.grade-btns{display:flex;gap:6px;flex-wrap:wrap}
.gbtn{background:var(--card);border:2px solid #EDE5F5;color:var(--purple);font-size:12px;font-weight:800;border-radius:24px;padding:6px 16px;cursor:pointer;transition:all 0.2s cubic-bezier(.34,1.56,.64,1);font-family:'Nunito',sans-serif;white-space:nowrap}
.gbtn:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.gbtn.active{background:var(--purple);color:#fff;border-color:var(--purple);box-shadow:0 4px 16px rgba(139,92,246,0.3)}
.gbtn.custom{border-color:#FDE68A;color:var(--orange)}
.gbtn.custom.active{background:var(--orange);color:#fff;border-color:var(--orange)}
.gbtn.wrong-btn{border-color:#FCA5A5;color:#EF4444}
.gbtn.wrong-btn.active{background:#EF4444;color:#fff;border-color:#EF4444}
.wrong-badge{display:inline-block;background:#EF4444;color:#fff;border-radius:10px;padding:0 6px;font-size:10px;font-weight:800;margin-left:4px;line-height:1.5}

/* CONTROLS */
.ctrl-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
select{font-family:'Nunito',sans-serif;background:var(--card);border:2px solid #EDE5F5;color:var(--text);border-radius:12px;padding:7px 12px;font-size:13px;font-weight:700;cursor:pointer;outline:none;transition:border-color 0.2s;-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23A0A0B8' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:28px}
select:hover,select:focus{border-color:var(--purple)}
.btn-go{background:linear-gradient(135deg,#E85D8C 0%,#F59E0B 100%);color:#fff;border:none;border-radius:14px;padding:9px 24px;font-size:14px;font-weight:900;font-family:'Nunito',sans-serif;cursor:pointer;box-shadow:0 4px 16px rgba(232,93,140,0.3);transition:all 0.15s;letter-spacing:0.3px}
.btn-go:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(232,93,140,0.4)}
.btn-go:active{transform:scale(0.96)}
.btn-icon{background:var(--card);border:2px solid #EDE5F5;color:var(--muted);font-size:16px;width:38px;height:38px;border-radius:12px;cursor:pointer;font-family:'Nunito',sans-serif;transition:all 0.15s;display:flex;align-items:center;justify-content:center}
.btn-icon:hover{border-color:var(--purple);color:var(--purple)}
.btn-icon.on{border-color:var(--orange);color:var(--orange)}

/* TIMER */
.timer-strip{height:7px;background:#F0E8F8;border-radius:4px;margin-bottom:12px;overflow:hidden}
.timer-fill{height:100%;border-radius:4px;background:linear-gradient(90deg,var(--teal),var(--blue));transition:width 1s linear}
.timer-fill.warn{background:linear-gradient(90deg,#EF4444,var(--pink));animation:timerPulse 0.5s ease-in-out infinite}
@keyframes timerPulse{0%,100%{opacity:1}50%{opacity:0.7}}

/* HINT */
.hint-box{background:var(--card);border-radius:14px;padding:10px 16px;font-size:13px;color:var(--muted);margin-bottom:14px;text-align:center;box-shadow:var(--shadow-sm);border:1.5px solid rgba(0,0,0,0.04);line-height:1.5}
.hint-box b{color:var(--purple)}

/* PROGRESS */
.progress-row{display:flex;justify-content:center;gap:6px;margin-bottom:14px;flex-wrap:wrap}
.pdot{width:10px;height:10px;border-radius:50%;background:#E8E0F0;transition:all 0.35s cubic-bezier(.34,1.56,.64,1)}
.pdot.done{background:var(--teal);transform:scale(1.15);box-shadow:0 0 8px rgba(20,184,166,0.4)}

/* GRID */
.grid{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;padding:4px 0}

/* BUBBLES */
.bubble{border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#fff;position:relative;overflow:hidden;transition:transform 0.18s cubic-bezier(.34,1.56,.64,1),box-shadow 0.18s,opacity 0.35s;user-select:none;-webkit-user-select:none;flex-shrink:0;will-change:transform}
.bubble::before{content:'';position:absolute;top:10%;left:15%;width:35%;height:28%;background:radial-gradient(ellipse at 45% 40%,rgba(255,255,255,0.6) 0%,rgba(255,255,255,0) 72%);border-radius:50%;pointer-events:none;z-index:1}
.bubble.gone::before{display:none}
.bubble.en{background:radial-gradient(circle at 35% 30%,#A8D4FF,#5B9EF5 50%,#3070C8);box-shadow:0 6px 20px rgba(91,158,245,0.4),inset 0 -5px 10px rgba(0,0,0,0.18),inset 0 4px 8px rgba(255,255,255,0.45)}
.bubble.zh{background:radial-gradient(circle at 35% 30%,#FFB3CC,#E0527A 50%,#B03060);box-shadow:0 6px 20px rgba(224,82,122,0.4),inset 0 -5px 10px rgba(0,0,0,0.18),inset 0 4px 8px rgba(255,255,255,0.45)}
.btext{display:block;white-space:nowrap;text-align:center;line-height:1.15;pointer-events:none;max-width:82%;position:relative;z-index:2;text-shadow:0 1px 3px rgba(0,0,0,0.18)}
.bubble.en .btext{font-family:'Fredoka',cursive;font-weight:600;letter-spacing:0.2px}
.bubble.zh .btext{font-family:'Ma Shan Zheng','Nunito',sans-serif;font-weight:700}
.bubble:hover:not(.selected):not(.gone):not(.wrong){transform:scale(1.08) translateY(-3px)}
.bubble.selected.en{background:radial-gradient(circle at 35% 30%,#BFFFF8,#4ECDC4 50%,#2AADA0);box-shadow:0 0 0 4px rgba(78,205,196,0.4),0 8px 24px rgba(78,205,196,0.45),inset 0 -4px 8px rgba(0,0,0,0.12),inset 0 3px 6px rgba(255,255,255,0.4);transform:scale(1.13) translateY(-5px);animation:selectPulse 1.2s ease-in-out infinite}
.bubble.selected.zh{background:radial-gradient(circle at 35% 30%,#FFF5B0,#FFB800 50%,#D49200);box-shadow:0 0 0 4px rgba(255,184,0,0.4),0 8px 24px rgba(255,184,0,0.45),inset 0 -4px 8px rgba(0,0,0,0.12),inset 0 3px 6px rgba(255,255,255,0.4);transform:scale(1.13) translateY(-5px);animation:selectPulse 1.2s ease-in-out infinite}
@keyframes selectPulse{0%,100%{box-shadow:0 0 0 4px rgba(78,205,196,0.35),0 8px 28px rgba(78,205,196,0.4),inset 0 -4px 8px rgba(0,0,0,0.1),inset 0 3px 6px rgba(255,255,255,0.35)}50%{box-shadow:0 0 0 8px rgba(78,205,196,0.15),0 8px 28px rgba(78,205,196,0.5),inset 0 -4px 8px rgba(0,0,0,0.1),inset 0 3px 6px rgba(255,255,255,0.35)}}
.bubble.wrong{animation:shake 0.45s ease;filter:brightness(0.7) saturate(0.5)}
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-8px) rotate(-2deg)}40%{transform:translateX(8px) rotate(2deg)}60%{transform:translateX(-5px) rotate(-1deg)}80%{transform:translateX(5px) rotate(1deg)}}
.bubble.gone{opacity:0;transform:scale(0.15)!important;pointer-events:none;transition:all 0.4s cubic-bezier(.55,0,.1,1)}
.bubble.entering{opacity:0;transform:scale(0.3) translateY(20px)}
.bubble.entered{opacity:1;transform:scale(1) translateY(0)}

/* FLOATING SCORE */
.pop{position:fixed;pointer-events:none;z-index:200;font-family:'Fredoka',cursive;font-size:22px;font-weight:700;animation:popUp 0.9s ease-out forwards;text-shadow:0 2px 6px rgba(0,0,0,0.12)}
@keyframes popUp{0%{opacity:1;transform:translateY(0) scale(1.15)}100%{opacity:0;transform:translateY(-70px) scale(0.75)}}

/* COMBO */
#comboFlash{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);z-index:180;pointer-events:none;opacity:0;transition:opacity 0.15s;text-align:center}
#comboFlash.show{opacity:1}
#comboText{font-family:'Fredoka',cursive;font-size:52px;font-weight:700;text-shadow:0 4px 20px rgba(0,0,0,0.1);animation:comboZoom 0.5s cubic-bezier(.34,1.56,.64,1)}
@keyframes comboZoom{0%{transform:scale(2.5) rotate(-5deg);opacity:0}100%{transform:scale(1) rotate(0);opacity:1}}
#comboSub{font-family:'Nunito',sans-serif;font-size:16px;font-weight:800;color:var(--muted);margin-top:-2px}

/* OVERLAY & MODAL */
.overlay{position:fixed;inset:0;background:rgba(255,249,243,0.92);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:300;display:flex;align-items:center;justify-content:center;animation:fadeIn 0.3s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal{background:var(--card);border-radius:28px;padding:28px 24px;text-align:center;max-width:380px;width:92%;box-shadow:var(--shadow-lg);animation:modalIn 0.45s cubic-bezier(.34,1.56,.64,1);max-height:90vh;overflow-y:auto}
@keyframes modalIn{0%{opacity:0;transform:scale(0.8) translateY(20px)}100%{opacity:1;transform:scale(1) translateY(0)}}
.modal .em{font-size:52px;margin-bottom:6px}
.modal h2{font-family:'Fredoka',cursive;font-size:24px;font-weight:700;color:var(--pink);margin-bottom:6px}
.modal .sub{color:var(--muted);font-size:13px;margin-bottom:14px;font-weight:700}
.modal .big{font-family:'Fredoka',cursive;font-size:48px;font-weight:700;color:var(--blue);display:block;margin-bottom:2px}
.modal .big-label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:1.5px;font-weight:800;margin-bottom:14px}
.modal .chips{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:18px}
.modal .chip{background:#F7F0FF;color:var(--purple);border-radius:20px;padding:5px 14px;font-size:12px;font-weight:800}
.modal .stars{font-size:32px;letter-spacing:6px;margin-bottom:10px;animation:starsIn 0.6s cubic-bezier(.34,1.56,.64,1) 0.2s both}
@keyframes starsIn{0%{transform:scale(0)}100%{transform:scale(1)}}
.modal .btn-go{width:100%;font-size:15px;padding:12px;margin-bottom:10px;border-radius:16px}
.modal .btn-link{background:none;border:none;color:var(--muted);font-size:13px;font-weight:700;cursor:pointer;font-family:'Nunito',sans-serif;padding:6px;transition:color 0.15s}
.modal .btn-link:hover{color:var(--purple)}
.modal .btn-share{width:100%;background:linear-gradient(135deg,var(--purple),var(--blue));color:#fff;border:none;border-radius:16px;padding:11px;font-size:14px;font-weight:900;font-family:'Nunito',sans-serif;cursor:pointer;margin-bottom:10px;box-shadow:0 4px 16px rgba(139,92,246,0.3)}

/* WORD LIST */
.word-list-wrap{margin-top:10px;text-align:left}
.word-pair{display:flex;align-items:center;padding:6px 0;border-bottom:1px solid #F0E8F8;font-size:14px;font-weight:700}
.word-pair:last-child{border-bottom:none}
.word-pair .en-w{color:var(--blue);flex:1;font-family:'Fredoka',cursive;font-weight:600}
.word-pair .zh-w{color:var(--pink);flex:1;text-align:right;font-family:'Ma Shan Zheng',sans-serif;font-size:16px}
.word-pair .check{width:24px;text-align:center}

/* SCREEN SHAKE */
.screen-shake{animation:screenShake 0.3s ease}
@keyframes screenShake{0%,100%{transform:translate(0,0)}25%{transform:translate(-3px,2px)}50%{transform:translate(3px,-2px)}75%{transform:translate(-2px,1px)}}

/* ===== CUSTOM VOCAB MODAL ===== */
.cv-overlay{position:fixed;inset:0;background:rgba(255,249,243,0.92);backdrop-filter:blur(8px);z-index:400;display:flex;align-items:center;justify-content:center;animation:fadeIn 0.3s ease}
.cv-modal{background:var(--card);border-radius:24px;padding:24px;max-width:480px;width:94%;box-shadow:var(--shadow-lg);animation:modalIn 0.4s cubic-bezier(.34,1.56,.64,1);max-height:88vh;overflow-y:auto}
.cv-modal h3{font-family:'Fredoka',cursive;font-size:20px;font-weight:700;color:var(--text);margin-bottom:4px}
.cv-modal .cv-sub{font-size:12px;color:var(--muted);margin-bottom:14px;font-weight:700}
.cv-modal label{font-size:12px;font-weight:800;color:var(--text);display:block;margin-bottom:4px}
.cv-modal input[type=text]{width:100%;border:2px solid #EDE5F5;border-radius:12px;padding:8px 12px;font-size:14px;font-family:'Nunito',sans-serif;font-weight:700;outline:none;transition:border-color 0.2s;margin-bottom:12px}
.cv-modal input[type=text]:focus{border-color:var(--purple)}
.cv-modal textarea{width:100%;border:2px solid #EDE5F5;border-radius:12px;padding:10px 12px;font-size:13px;font-family:'Nunito',sans-serif;font-weight:600;outline:none;resize:vertical;min-height:140px;line-height:1.7;transition:border-color 0.2s;margin-bottom:4px}
.cv-modal textarea:focus{border-color:var(--purple)}
.cv-hint{font-size:11px;color:var(--muted);margin-bottom:14px}
.cv-error{font-size:12px;color:#EF4444;font-weight:700;margin-bottom:10px;display:none}
.cv-btns{display:flex;gap:8px}
.cv-btns button{flex:1;padding:10px;border-radius:14px;font-family:'Nunito',sans-serif;font-weight:800;font-size:14px;cursor:pointer;border:none;transition:all 0.15s}
.cv-btns .cv-cancel{background:#F0E8F8;color:var(--purple)}
.cv-btns .cv-save{background:linear-gradient(135deg,var(--purple),var(--blue));color:#fff;box-shadow:0 4px 16px rgba(139,92,246,0.3)}
.cv-btns .cv-save:active,.cv-btns .cv-cancel:active{transform:scale(0.96)}

/* SAVED VOCAB LIST */
.cv-saved{margin-top:16px;border-top:1.5px solid #F0E8F8;padding-top:12px}
.cv-saved-title{font-size:12px;font-weight:800;color:var(--muted);margin-bottom:8px}
.cv-item{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:#FAFAFE;border-radius:10px;margin-bottom:6px}
.cv-item-name{font-weight:800;font-size:13px;color:var(--text)}
.cv-item-count{font-size:11px;color:var(--muted);font-weight:700}
.cv-item-actions{display:flex;gap:4px}
.cv-item-actions button{background:none;border:none;font-size:16px;cursor:pointer;padding:2px 4px;border-radius:6px;transition:background 0.15s}
.cv-item-actions button:hover{background:#F0E8F8}

/* ===== ACHIEVEMENTS PANEL ===== */
.ach-overlay{position:fixed;inset:0;background:rgba(255,249,243,0.92);backdrop-filter:blur(8px);z-index:400;display:flex;align-items:center;justify-content:center;animation:fadeIn 0.3s ease}
.ach-modal{background:var(--card);border-radius:24px;padding:24px;max-width:420px;width:94%;box-shadow:var(--shadow-lg);animation:modalIn 0.4s cubic-bezier(.34,1.56,.64,1);max-height:88vh;overflow-y:auto}
.ach-modal h3{font-family:'Fredoka',cursive;font-size:22px;font-weight:700;color:var(--text);margin-bottom:4px}
.ach-progress{font-size:12px;color:var(--muted);font-weight:700;margin-bottom:16px}
.ach-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.ach-card{background:#FAFAFE;border-radius:14px;padding:14px 12px;text-align:center;transition:all 0.2s;border:1.5px solid transparent}
.ach-card.unlocked{background:#FFFBEB;border-color:#FDE68A}
.ach-card .ach-icon{font-size:32px;margin-bottom:4px;filter:grayscale(1) opacity(0.3)}
.ach-card.unlocked .ach-icon{filter:none;animation:achBounce 0.5s cubic-bezier(.34,1.56,.64,1)}
@keyframes achBounce{0%{transform:scale(0.5)}100%{transform:scale(1)}}
.ach-card .ach-name{font-size:12px;font-weight:800;color:var(--text);margin-bottom:2px}
.ach-card .ach-desc{font-size:10px;color:var(--muted);font-weight:600;line-height:1.3}
.ach-card.locked .ach-name{color:var(--muted)}
.ach-close{display:block;margin:16px auto 0;background:#F0E8F8;color:var(--purple);border:none;border-radius:14px;padding:10px 32px;font-family:'Nunito',sans-serif;font-weight:800;font-size:14px;cursor:pointer}

/* ACHIEVEMENT UNLOCK TOAST */
.ach-toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);z-index:500;background:linear-gradient(135deg,#FFFBEB,#FEF3C7);border:2px solid #FDE68A;border-radius:16px;padding:12px 20px;display:flex;align-items:center;gap:10px;box-shadow:0 8px 32px rgba(245,158,11,0.25);animation:toastIn 0.5s cubic-bezier(.34,1.56,.64,1),toastOut 0.4s ease 2.6s forwards;pointer-events:none}
@keyframes toastIn{0%{opacity:0;transform:translateX(-50%) translateY(-30px) scale(0.8)}100%{opacity:1;transform:translateX(-50%) translateY(0) scale(1)}}
@keyframes toastOut{0%{opacity:1;transform:translateX(-50%) translateY(0)}100%{opacity:0;transform:translateX(-50%) translateY(-20px)}}
.ach-toast .ach-toast-icon{font-size:28px}
.ach-toast .ach-toast-text{font-size:13px;font-weight:800;color:var(--text)}
.ach-toast .ach-toast-name{color:var(--orange);font-family:'Fredoka',cursive;font-size:15px;display:block}

/* ===== LEADERBOARD ===== */
.lb-overlay{position:fixed;inset:0;background:rgba(255,249,243,0.92);backdrop-filter:blur(8px);z-index:400;display:flex;align-items:center;justify-content:center;animation:fadeIn 0.3s ease}
.lb-modal{background:var(--card);border-radius:24px;padding:24px;max-width:420px;width:94%;box-shadow:var(--shadow-lg);animation:modalIn 0.4s cubic-bezier(.34,1.56,.64,1);max-height:88vh;overflow-y:auto}
.lb-modal h3{font-family:'Fredoka',cursive;font-size:22px;font-weight:700;color:var(--text);margin-bottom:4px}
.lb-sub{font-size:12px;color:var(--muted);font-weight:700;margin-bottom:16px}
.lb-tabs{display:flex;gap:6px;margin-bottom:16px;flex-wrap:wrap}
.lb-tab{background:#F0E8F8;color:var(--purple);border:none;border-radius:20px;padding:5px 14px;font-size:12px;font-weight:800;cursor:pointer;font-family:'Nunito',sans-serif;transition:all 0.15s}
.lb-tab.active{background:var(--purple);color:#fff}
.lb-list{display:flex;flex-direction:column;gap:8px;min-height:120px}
.lb-row{display:flex;align-items:center;gap:10px;padding:10px 14px;background:#FAFAFE;border-radius:12px;border:1.5px solid #F0E8F8}
.lb-rank{font-family:'Fredoka',cursive;font-size:18px;font-weight:700;width:28px;text-align:center}
.lb-rank.gold{color:#F59E0B}
.lb-rank.silver{color:#94A3B8}
.lb-rank.bronze{color:#CD7C5F}
.lb-info{flex:1}
.lb-val{font-family:'Fredoka',cursive;font-size:20px;font-weight:700;color:var(--blue);line-height:1}
.lb-date{font-size:10px;color:var(--muted);font-weight:700;margin-top:1px}
.lb-empty{text-align:center;color:var(--muted);font-size:13px;font-weight:700;padding:24px 0}
.lb-close{display:block;margin:16px auto 0;background:#F0E8F8;color:var(--purple);border:none;border-radius:14px;padding:10px 32px;font-family:'Nunito',sans-serif;font-weight:800;font-size:14px;cursor:pointer}
.lb-clear{display:block;margin:8px auto 0;background:none;color:#EF4444;border:none;font-size:12px;font-weight:700;cursor:pointer;font-family:'Nunito',sans-serif;padding:4px}

/* ===== WRONG WORD BOOK ===== */
.ww-overlay{position:fixed;inset:0;background:rgba(255,249,243,0.92);backdrop-filter:blur(8px);z-index:400;display:flex;align-items:center;justify-content:center;animation:fadeIn 0.3s ease}
.ww-modal{background:var(--card);border-radius:24px;padding:24px;max-width:420px;width:94%;box-shadow:var(--shadow-lg);animation:modalIn 0.4s cubic-bezier(.34,1.56,.64,1);max-height:88vh;overflow-y:auto}
.ww-modal h3{font-family:'Fredoka',cursive;font-size:22px;font-weight:700;color:var(--text);margin-bottom:4px}
.ww-sub{font-size:12px;color:var(--muted);font-weight:700;margin-bottom:16px}
.ww-list{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.ww-row{display:flex;align-items:center;gap:10px;padding:8px 12px;background:#FFF5F5;border-radius:10px;border:1.5px solid #FCA5A5}
.ww-en{font-family:'Fredoka',cursive;font-size:15px;font-weight:600;color:#EF4444;flex:1}
.ww-zh{font-family:'Ma Shan Zheng',sans-serif;font-size:15px;color:var(--text);flex:1}
.ww-cnt{font-size:11px;font-weight:800;color:#EF4444;background:#FEE2E2;border-radius:8px;padding:2px 8px}
.ww-del{background:none;border:none;font-size:16px;cursor:pointer;color:var(--muted);padding:2px 4px;border-radius:6px}
.ww-del:hover{background:#FEE2E2}
.ww-btns{display:flex;gap:8px}
.ww-btns button{flex:1;padding:10px;border-radius:14px;font-family:'Nunito',sans-serif;font-weight:800;font-size:14px;cursor:pointer;border:none}
.ww-start{background:linear-gradient(135deg,#EF4444,#F59E0B);color:#fff;box-shadow:0 4px 16px rgba(239,68,68,0.3)}
.ww-close{background:#F0E8F8;color:var(--purple)}
.ww-empty{text-align:center;color:var(--muted);font-size:13px;font-weight:700;padding:24px 0}

/* SHARE CARD */
.share-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.6);backdrop-filter:blur(10px);z-index:450;display:flex;align-items:center;justify-content:center;animation:fadeIn 0.3s ease}
.share-wrap{text-align:center}
.share-wrap canvas{border-radius:20px;box-shadow:0 20px 60px rgba(0,0,0,0.4);display:block;max-width:92vw}
.share-btns{display:flex;gap:10px;justify-content:center;margin-top:16px}
.share-btns button{padding:10px 24px;border-radius:14px;font-family:'Nunito',sans-serif;font-weight:800;font-size:14px;cursor:pointer;border:none}
.share-dl{background:linear-gradient(135deg,var(--purple),var(--blue));color:#fff;box-shadow:0 4px 16px rgba(139,92,246,0.4)}
.share-cancel{background:rgba(255,255,255,0.2);color:#fff}

/* RESPONSIVE */
@media(max-width:400px){
  #app{padding:10px 8px 20px}.logo{font-size:22px}.stat{padding:4px 10px;min-width:44px}.stat-v{font-size:17px}
  .gbtn{padding:5px 12px;font-size:11px}.ctrl-row{gap:6px}select{padding:6px 8px;font-size:12px}.btn-go{padding:8px 18px;font-size:13px}
  .ach-grid{grid-template-columns:1fr}
}

/* sticky footer: pin footer to viewport bottom on short pre-game screens */
body{display:flex;flex-direction:column;min-height:100vh}
#app{flex:1 0 auto}