:root{--secondary:#6366f1;--glass-bg:#ffffffb3;--glass-border:#fff6;--bg-color:#f8fafc;--card-bg:#ffffffd9;--card-border:#00000014;--primary:#ec4899;--primary-glow:#ec489933;--text-main:#1e293b;--text-muted:#64748b;--accent:#0d9488;--font-sans:"Inter", "Noto Sans JP", sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);font-family:var(--font-sans);line-height:1.6;overflow-x:hidden}#root{flex-direction:column;min-height:100vh;display:flex}.glass{background:var(--card-bg);-webkit-backdrop-filter:blur(8px);border:1px solid var(--card-border);border-radius:12px;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}header{z-index:100;-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--card-border);background:#f8fafccc;justify-content:space-between;align-items:center;padding:.75rem 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.math-fraction{vertical-align:middle;flex-direction:column;align-items:center;margin:0 .15em;line-height:1;display:inline-flex}.training-module .numerator,.denominator{text-align:center;min-width:.8em;min-height:1em;padding:0 .3rem;font-size:.75em}.training-module .denominator{margin-top:.1em}.training-module .fraction-line{background:var(--primary);border-radius:2px;width:100%;height:3px;margin:.1em 0}.training-module .math-sqrt{align-items:flex-end;margin-left:.1em;display:inline-flex;position:relative}.training-module .sqrt-symbol{margin-right:-.1em;font-size:1.1em;transform:translateY(.05em)}.training-module .sqrt-content{border-top:3px solid var(--primary);border-top-left-radius:2px;margin-top:.2em;padding:.1em .2em 0}.training-module .inline-cursor{background:var(--primary);vertical-align:middle;border-radius:2px;width:3px;height:.9em;margin-left:1px;display:inline-block}.training-module .inline-cursor.blinking{animation:1s step-end infinite blink}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}.training-module .inline-cursor.hidden{display:none}.training-module .editor-hidden-input{opacity:0;cursor:text;z-index:1;background:0 0;border:none;width:100%;height:100%;font-size:16px;position:absolute;top:0;left:0}.training-module .direct-submit-btn{background:var(--primary);color:#fff;cursor:pointer;z-index:10;border:none;border-radius:20px;margin-left:1rem;padding:1.2rem 2.5rem;font-size:1.3rem;font-weight:900;transition:all .2s;box-shadow:0 6px 15px #ec48994d}.training-module .direct-submit-btn:hover{background:var(--primary-hover);transform:translateY(-3px)scale(1.02);box-shadow:0 15px 30px #ec489980}.training-module .math-symbol-grid{grid-template-columns:repeat(5,1fr);gap:15px;width:100%;display:grid}.training-module .sym-btn{aspect-ratio:1.25;border-radius:24px;font-size:2rem}.training-module .animate-fade-in{animation:.5s cubic-bezier(.16,1,.3,1) fadeIn}.training-module .math-cursor{background-color:var(--primary);vertical-align:middle;width:3px;height:1.1em;margin:0 1px;animation:1s step-end infinite blink;display:inline-block;color:var(--primary)!important}