:root{--color-bg:#000;--color-text:#fff;--color-accent:#8b0000;--color-accent-hover:#a00000;--color-success:#0f0;--color-error:red;--font-family:"Inter", "Roboto", "Helvetica Neue", sans-serif;--transition-speed:.3s}body{background-color:var(--color-bg);color:var(--color-text);font-family:var(--font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;padding:0;overflow-x:hidden}#root{flex-direction:column;min-height:100vh;display:flex}h1,h2,h3,h4,h5,h6{margin:0;font-weight:700}button{cursor:pointer;transition:all var(--transition-speed) ease;font-family:inherit}button:disabled{cursor:not-allowed;opacity:.5}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.fade-in{animation:fadeIn var(--transition-speed) ease-in-out forwards}.app-container{flex-direction:column;width:100%;min-height:100vh;display:flex}.screen-container{flex-direction:column;flex:1;justify-content:center;align-items:center;width:100%;animation:.4s fadeIn;display:flex}.btn-primary{background-color:var(--color-accent);color:var(--color-text);text-transform:uppercase;letter-spacing:1px;border:none;border-radius:8px;padding:1rem 2rem;font-size:1.2rem;font-weight:700}.btn-primary:hover{background-color:var(--color-accent-hover);transform:translateY(-2px);box-shadow:0 4px 12px #8b000066}.btn-secondary{color:var(--color-text);border:1px solid var(--color-text);background:0 0;border-radius:4px;padding:.5rem 1rem;font-size:.9rem}.btn-secondary:hover{background:#ffffff1a}.input-field{color:var(--color-text);width:100%;max-width:300px;transition:border-color var(--transition-speed);background:#ffffff0d;border:1px solid #fff3;border-radius:4px;outline:none;padding:.8rem 1rem;font-family:inherit;font-size:1rem}.input-field:focus{border-color:var(--color-accent)}.input-text-center{text-align:center}.input-large{max-width:150px;padding:1rem;font-size:2rem}.home-screen{text-align:center;gap:2rem}.home-title{letter-spacing:2px;margin-bottom:1rem;font-size:4rem}.accent-text{color:var(--color-accent)}.config-form{background:#ffffff08;border:1px solid #ffffff0d;border-radius:12px;flex-direction:column;align-items:center;gap:1.5rem;width:100%;max-width:400px;padding:2rem;display:flex}.form-group{flex-direction:column;align-items:flex-start;gap:.5rem;width:100%;display:flex}.form-group label{color:#ffffffb3;font-size:.9rem}.mode-toggle{gap:1rem;width:100%;display:flex}.mode-btn{color:var(--color-text);background:#ffffff0d;border:1px solid #fff3;border-radius:4px;flex:1;padding:.8rem;position:relative}.mode-btn[data-desc]:hover:after{content:attr(data-desc);border:1px solid var(--color-accent);color:var(--color-text);white-space:normal;z-index:100;pointer-events:none;background-color:#111;border-radius:6px;width:max-content;max-width:200px;padding:.75rem;font-size:.85rem;line-height:1.4;position:absolute;bottom:125%;left:50%;transform:translate(-50%);box-shadow:0 4px 12px #000c}.mode-btn.active{background:var(--color-accent);border-color:var(--color-accent)}.modal-overlay{z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#000c;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{text-align:left;background:#111;border:1px solid #ffffff1a;border-radius:12px;width:90%;max-width:500px;padding:2rem;position:relative}.modal-content p{color:#ccc;line-height:1.6}.modal-close{color:#fff;background:0 0;border:none;font-size:1.5rem;position:absolute;top:1rem;right:1rem}.fullscreen-toggle{color:#fff;opacity:.5;z-index:50;background:0 0;border:none;padding:.5rem;position:absolute;top:1rem;right:1rem}.fullscreen-toggle:hover{opacity:1}.training-container{flex-direction:column;justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:relative}.shutter-area{justify-content:center;align-items:center;width:100%;min-height:300px;display:flex}.flash-equation{justify-content:center;align-items:center;font-size:6rem;font-weight:700;display:flex}.operator-anchor{width:4rem;color:var(--color-accent);justify-content:center;align-items:center;display:inline-flex;position:relative}.ten-frame{background:#ffffff05;border:4px solid #fff3;border-radius:12px;grid-template-rows:repeat(2,1fr);grid-template-columns:repeat(5,1fr);gap:1rem;padding:2.5rem;display:grid}.dot-cell{background:0 0;border:2px solid #ffffff1a;border-radius:50%;width:70px;height:70px}.dot-cell.filled{background:var(--color-text);border-color:var(--color-text);box-shadow:0 0 15px #ffffff80}.input-area{flex-direction:column;align-items:center;gap:1rem;min-height:350px;margin-top:1rem;display:flex}.feedback-cue{text-transform:uppercase;letter-spacing:2px;height:40px;font-size:1.5rem;font-weight:700}.feedback-success{color:var(--color-success)}.feedback-error{color:var(--color-error)}.feedback-missed{color:orange}.numpad{grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1rem;display:grid}.num-btn{color:#fff;background:#ffffff0d;border:1px solid #fff3;border-radius:50%;width:70px;height:70px;font-size:2rem}.num-btn:hover,.num-btn:active{background:#fff3}.num-btn-zero{grid-column:2}.recap-screen{text-align:center;width:100%;max-width:600px}.stat-card{background:#ffffff0d;border-radius:8px;justify-content:space-between;align-items:center;margin-bottom:1rem;padding:1.5rem;font-size:1.2rem;display:flex}.peak-speed{color:var(--color-accent);text-shadow:0 0 20px #8b000066;margin:1rem 0;font-size:3.5rem;font-weight:700}.chart-container{box-sizing:border-box;background:#ffffff05;border:1px solid #ffffff1a;border-radius:8px;width:100%;height:250px;margin:2rem 0;padding:1rem}.controls{justify-content:center;gap:1rem;margin-top:2rem;display:flex}.factor-equation{flex-direction:column;justify-content:center;align-items:center;gap:1rem;display:flex}.factor-top{font-size:6rem;font-weight:700}.factor-bottom{color:var(--color-accent);font-size:3rem;font-weight:700}.square-equation{font-size:8rem;font-weight:700}.divisibility-equation{flex-direction:column;justify-content:center;align-items:center;display:flex}.div-target{font-size:6rem;font-weight:700}.div-divisor-container{color:var(--color-accent);align-items:center;gap:.5rem;display:flex}.div-op{font-size:3rem}.div-divisor{font-size:4rem;font-weight:700}.yn-buttons{gap:2rem;margin-top:1rem;display:flex}.yn-btn{color:#fff;cursor:pointer;background:#ffffff0d;border:1px solid #fff3;border-radius:8px;width:100px;height:60px;font-size:1.5rem}.yn-btn:hover{background:#fff3}@media print{body{color:#fff!important;background:#000!important}.controls{display:none!important}}