.stars{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0}
.star{position:absolute;background:#fff;border-radius:50%}
html,body{height:100%;margin:0;background:#000;overflow:hidden;font-family:sans-serif;color:#fff;user-select:none;-webkit-user-select:none}
body.training-active{touch-action:none;-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;overscroll-behavior:none}
#mainCanvas{position:absolute;top:0;left:0;width:100%;height:100%;z-index:0;min-width:100%;min-height:100%;touch-action:none;-webkit-user-drag:none}
#controls{position:absolute;top:16px;left:50%;transform:translateX(-50%);z-index:2;display:flex;flex-direction:column;align-items:center;gap:10px;cursor:default;}
#colorBar{display:flex;gap:10px;align-items:center}
.color-swatch{width:32px;height:32px;border-radius:50%;cursor:pointer;border:2px solid transparent;transition:all .25s ease;position:relative}
.color-swatch:hover{transform:scale(1.2);border-color:rgba(255,255,255,0.5)}
.color-swatch.active{border-color:#fff;box-shadow:0 0 16px currentColor,0 4px 12px rgba(0,0,0,0.4);transform:scale(1.1)}
.color-swatch::after{content:'';position:absolute;inset:-4px;border-radius:50%;border:2px solid transparent;transition:all .2s}
.color-swatch:hover::after{border-color:rgba(255,255,255,0.3)}
.slider-group{display:flex;align-items:center;gap:10px;}
.slider-label{font-size:13px;letter-spacing:1px;color:#888;min-width:55px;text-align:right;}
.slider-val{font-size:12px;color:#666;min-width:32px;}
input[type=range]{appearance:none;-webkit-appearance:none;-moz-appearance:none;width:140px;height:4px;border-radius:2px;background:linear-gradient(90deg,#333,#444);outline:none;cursor:pointer;transition:all .2s;touch-action:manipulation}
input[type=range]:hover{background:linear-gradient(90deg,#444,#555)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:linear-gradient(135deg,#00f0d8,#00d0c0);cursor:pointer;border:none;box-shadow:0 2px 8px rgba(0,240,216,0.4);transition:all .2s;touch-action:manipulation}
input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2);box-shadow:0 4px 12px rgba(0,240,216,0.6)}
input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:linear-gradient(135deg,#00f0d8,#00d0c0);cursor:pointer;border:none;box-shadow:0 2px 8px rgba(0,240,216,0.4);transition:all .2s;touch-action:manipulation}
input[type=range]::-moz-range-thumb:hover{transform:scale(1.2)}
input[type=range]::-moz-range-track{height:4px;border-radius:2px;background:linear-gradient(90deg,#333,#444);touch-action:manipulation}
/* === Modal (generic, for win/tips modals) - Enhanced === */
.modal{display:none;position:fixed;inset:0;z-index:999;background:rgba(0,0,0,0.7);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);align-items:center;justify-content:center}
.modal.show{display:flex}
.modal-content{background:var(--card,rgba(12,15,26,0.7));border:1px solid var(--border,rgba(255,255,255,0.06));border-radius:var(--radius,16px);padding:32px;max-width:400px;width:90%;text-align:center;transition:all .3s ease}
.modal-content:hover{border-color:rgba(255,255,255,0.12);box-shadow:0 12px 48px rgba(0,0,0,0.6)}
.modal-content h2{font-size:24px;color:var(--light,#f0f4f8);margin:0 0 16px;font-weight:300}
.modal-actions{display:flex;gap:10px;justify-content:center;margin-top:20px}
.modal-actions button{padding:10px 24px;border-radius:var(--radius-sm,10px);border:none;cursor:pointer;font-size:14px;font-weight:600;transition:all .2s;position:relative;overflow:hidden}
.modal-actions button::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,0.1),transparent);opacity:0;transition:opacity .2s}
.modal-actions button:hover::before{opacity:1}
.modal-actions button.primary{background:var(--accent,#00f0d8);color:var(--bg,#0a0a14)}
.modal-actions button.primary:hover{background:#00e0c8;transform:translateY(-1px);box-shadow:0 4px 20px rgba(0,240,216,0.4)}
.modal-actions button.secondary{background:var(--border,rgba(255,255,255,0.06));color:var(--text,#c8d0dc)}
.modal-actions button.secondary:hover{background:rgba(255,255,255,0.1);color:#fff}
@keyframes fadeIn{from{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}
.modal-content{animation:fadeIn .3s ease-out}
@keyframes flash{0%{transform:scale(1);outline-color:rgba(255,213,79,0.55);box-shadow:0 0 8px rgba(255,213,79,0.15);background:rgba(255,213,79,0.1)}50%{transform:scale(1.3);outline-color:#ffd54f;box-shadow:0 0 32px 12px rgba(255,213,79,0.85);background:rgba(255,213,79,0.35)}100%{transform:scale(1);outline-color:rgba(255,213,79,0.55);box-shadow:0 0 8px rgba(255,213,79,0.15);background:rgba(255,213,79,0.1)}}
#homeBtn.flash{animation:flash .5s ease-out;outline:2px solid transparent}

/* === Welcome Modal Card (Enhanced Visual Appeal) === */
.welcome-content{padding:32px 36px 40px;max-width:460px;width:90%;position:relative;background:rgba(12,15,26,0.95);border:1px solid rgba(255,255,255,0.08);border-radius:20px;text-align:center;box-shadow:0 8px 40px rgba(0,0,0,0.5)}
.welcome-content::before{content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:1;
  background:linear-gradient(135deg,rgba(0,240,216,0.15) 0%,rgba(124,108,240,0.1) 50%,transparent 100%);
  opacity:0;transition:opacity .3s ease}
.welcome-content:hover::before{opacity:1}
.welcome-content::after{content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:1;
  background:linear-gradient(to bottom,rgba(0,240,216,.1) 0%,rgba(0,240,216,.05) 20%,rgba(0,240,216,.01) 40%,transparent 60%),
             linear-gradient(to bottom,rgba(0,240,216,.06) 0%,rgba(0,240,216,.02) 35%,transparent 70%),
             linear-gradient(to bottom,rgba(0,240,216,.06) 0%,rgba(0,240,216,.02) 35%,transparent 70%);
  background-repeat:no-repeat;background-position:0 0,0 0,100% 0;background-size:100% 100%,2px 100%,2px 100%}
.welcome-content h2{font-size:22px;color:rgba(200,208,220,0.95);font-weight:300;margin:4px 0 14px;letter-spacing:-.3px;text-align:center}
.welcome-content .icon-wrap{font-size:48px;margin-bottom:8px;display:block;text-align:center}
.welcome-content p{font-size:15px;line-height:1.8;color:rgba(120,128,144,0.85);margin:0 0 20px;text-align:center}
.welcome-content strong{color:#00f0d8;font-weight:600}
.welcome-opt{display:flex;align-items:center;gap:8px;font-size:12px;color:rgba(120,128,144,0.7);cursor:pointer;justify-content:center;margin-bottom:16px}
.welcome-opt input{accent-color:#00f0d8;width:14px;height:14px;cursor:pointer}
.welcome-content .modal-actions{display:flex;gap:14px;justify-content:center;margin-top:20px}
.welcome-content .modal-actions button{padding:14px 32px;border-radius:12px;font-size:16px;cursor:pointer;border:none;font-weight:600;transition:all .2s}
.welcome-start-btn{background:linear-gradient(135deg,#00f0d8,#7c6cf0)!important;color:#04070d!important;box-shadow:0 4px 24px rgba(0,240,216,0.35)!important}
.welcome-start-btn:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,240,216,0.5)!important}
.welcome-start-btn:active{transform:translateY(0);box-shadow:0 2px 16px rgba(0,240,216,0.3)!important}
.welcome-guide-btn{background:linear-gradient(135deg,rgba(124,108,240,0.5),rgba(0,240,216,0.35))!important;color:rgba(255,255,255,0.7)!important;box-shadow:0 4px 20px rgba(124,108,240,0.2)!important}
.welcome-guide-btn:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(124,108,240,0.35)!important;color:#fff!important}
.welcome-guide-btn:active{transform:translateY(0)}

/* Language visibility for bilingual spans */
html[lang^="zh"] .en{display:none!important}
html[lang="en"] .cn{display:none!important}
#hint{position:absolute;bottom:30px;left:0;right:0;font-size:15px;letter-spacing:2px;text-shadow:0 0 8px rgba(0,255,255,0.3);text-align:center;line-height:1.8;white-space:nowrap;user-select:none;pointer-events:none;color:rgba(255,255,255,0.45)}
#pauseOverlay{display:none;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:5;font-size:28px;letter-spacing:4px;color:rgba(255,255,255,0.55);pointer-events:none;text-shadow:0 0 20px rgba(255,255,255,0.4);}
#keyHints{position:absolute;bottom:100px;left:0;right:0;text-align:center;z-index:6;font-size:12px;color:rgba(255,255,255,0.3);letter-spacing:1px;pointer-events:none;user-select:none;opacity:0;transition:opacity .5s;white-space:nowrap;}
#keyHints.show{opacity:1}
#counter{position:absolute;top:20px;left:24px;z-index:3;font-size:13px;color:rgba(255,255,255,0.65);letter-spacing:1px;cursor:default;text-shadow:0 0 8px rgba(255,255,255,0.3);display:none;}
#timer{position:absolute;top:20px;right:24px;z-index:3;font-size:13px;color:rgba(255,255,255,0.7);letter-spacing:1px;cursor:default;text-shadow:0 0 8px rgba(255,255,255,0.3);display:none;}
#homeBtn{position:absolute;top:18px;right:220px;z-index:3;background:none;border:1px solid rgba(255,255,255,0.3);color:rgba(255,255,255,0.7);padding:2px 10px;border-radius:10px;cursor:pointer;font-size:11px;text-decoration:none;letter-spacing:1px;text-shadow:0 0 6px rgba(255,255,255,0.4);}
#homeBtn:hover{color:#ffd54f;border-color:rgba(255,213,79,0.6);box-shadow:0 0 10px rgba(255,213,79,0.3);}
#guideBtn{position:absolute;top:18px;right:150px;z-index:3;background:none;border:1px solid rgba(255,255,255,0.3);color:rgba(255,255,255,0.7);padding:2px 10px;border-radius:10px;cursor:pointer;font-size:11px;text-decoration:none;letter-spacing:1px;text-shadow:0 0 6px rgba(255,255,255,0.4);}
#guideBtn:hover{color:#ffd54f;border-color:rgba(255,213,79,0.6);box-shadow:0 0 10px rgba(255,213,79,0.3);}
#langBtn{position:absolute;top:18px;right:80px;z-index:3;background:none;border:1px solid rgba(255,255,255,0.3);color:rgba(255,255,255,0.7);padding:2px 10px;border-radius:10px;cursor:pointer;font-size:11px;letter-spacing:1px;text-shadow:0 0 6px rgba(255,255,255,0.4);}
#langBtn:hover{color:#fff;border-color:rgba(255,255,255,0.6);box-shadow:0 0 10px rgba(255,255,255,0.3);}#langBtn,#homeBtn,#guideBtn{z-index:1999!important}
table{width:100%;border-collapse:collapse;margin:8px 0;}
th,td{border:1px solid rgba(255,255,255,0.1);padding:6px 8px;text-align:center;font-size:12px;}
th{background:rgba(255,255,255,0.05);}
.highlight{color:#ffd54f;font-weight:bold;}
#volumeBar{position:absolute;top:52px;right:24px;z-index:3;display:none;align-items:center;gap:6px;cursor:default;transition:opacity .35s;}
#volIcon{color:rgba(255,255,255,0.6);font-size:16px;text-shadow:0 0 6px rgba(255,255,255,0.2);cursor:pointer;user-select:none;}
#volIcon.muted{opacity:0.35;color:#f66;}
#volSlider{width:80px;height:4px;appearance:none;-webkit-appearance:none;background:#333;border-radius:2px;outline:none;cursor:pointer;}
#volSlider::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:#0ff;cursor:pointer;border:none;}
#volSlider::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:#0ff;cursor:pointer;border:none;}
@media(max-width:600px){
  #controls{gap:6px;top:8px}
  #colorBar{gap:6px;flex-wrap:wrap;justify-content:center}
  .color-swatch{width:24px;height:24px}
  .slider-group{gap:4px;flex-wrap:wrap;justify-content:center}
  .slider-label{font-size:11px;min-width:42px}
  input[type=range]{width:100px}
  .slider-val{font-size:10px;min-width:24px}
  #hint{font-size:12px;bottom:16px;letter-spacing:1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:90vw;left:5vw;right:5vw;}
  #homeBtn{right:190px;top:8px}#guideBtn{right:120px;top:8px}#langBtn{right:50px;top:8px}
  #timer{top:10px;right:10px;font-size:10px}
  #volumeBar{top:30px;right:10px}
  #volSlider{width:60px}
  .welcome-content{padding:24px 20px}
  .welcome-content h2{font-size:18px}
  .welcome-content p{font-size:14px}
  .welcome-content .modal-actions button{padding:12px 24px;font-size:14px}
}

/* Disclaimer inside welcome modal */
.welcome-disclaimer{position:relative;margin:12px 0 16px;padding:8px 14px;border-left:2px solid rgba(255,213,79,0.35);overflow:hidden;border-radius:0 6px 6px 0;font-size:12px;line-height:1.6;color:rgba(200,208,220,0.5);text-align:left}
.welcome-disclaimer::before{content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;background:linear-gradient(135deg,rgba(0,240,216,0.06) 0%,rgba(124,108,240,0.04) 50%,transparent 100%);z-index:-1}
.welcome-disclaimer strong{color:rgba(255,213,79,0.7);font-weight:600}

/* ====== Welcome Modal Overlay ====== */
#welcomeModal{display:none;position:fixed;inset:0;z-index:999;background:rgba(0,0,0,0.85);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);align-items:center;justify-content:center}
#welcomeModal.show{display:flex}
@keyframes welcomeFadeIn{from{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}
.welcome-content{animation:welcomeFadeIn .3s ease-out}