:root{--bg-color: #0f172a;--card-bg: rgba(30, 41, 59, .7);--accent-color: #38bdf8;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--matrix-cell-bg: rgba(51, 65, 85, .5);--highlight-1: #fbbf24;--highlight-2: #f87171;--highlight-3: #4ade80;--font-family: "Outfit", "Inter", -apple-system, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);font-family:var(--font-family);min-height:100vh;padding:2rem;background-image:radial-gradient(at 0% 0%,hsla(215,98%,61%,.15) 0px,transparent 50%),radial-gradient(at 100% 0%,hsla(125,98%,72%,.1) 0px,transparent 50%)}header{text-align:center;margin-bottom:2rem}h1{font-size:2.5rem;font-weight:800;letter-spacing:-.025em;background:linear-gradient(to bottom right,#fff,#94a3b8);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.header-links{margin-top:1rem}.math-link{color:var(--accent-color);text-decoration:none;font-size:.9rem;padding:.5rem 1rem;border-radius:9999px;background:#38bdf81a;border:1px solid rgba(56,189,248,.2);transition:all .3s}.math-link:hover{background:#38bdf833;box-shadow:0 0 15px #38bdf84d}.subtitle{font-size:1.2rem;font-weight:300;display:block;color:var(--text-secondary);margin-top:.5rem}#mode-selector{display:flex;justify-content:center;gap:1rem;margin-top:2rem;flex-wrap:wrap}.mode-btn{padding:.75rem 1.5rem;border-radius:9999px;border:1px solid rgba(255,255,255,.1);background:var(--card-bg);color:var(--text-secondary);cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);font-weight:600;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.mode-btn:hover{border-color:var(--accent-color);color:var(--text-primary)}.mode-btn.active{background:var(--accent-color);color:#000;border-color:var(--accent-color)}main{max-width:1400px;margin:0 auto}.controls{display:flex;justify-content:center;gap:3rem;margin-bottom:2rem;background:var(--card-bg);padding:1.5rem;border-radius:1rem;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.control-group{display:flex;align-items:center;gap:1rem}input[type=range]{width:200px;accent-color:var(--accent-color)}.content-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}.card{background:var(--card-bg);border-radius:1.5rem;padding:2rem;border:1px solid rgba(255,255,255,.05);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}h2{font-size:1.25rem;color:var(--text-secondary);margin-bottom:1.5rem;text-transform:uppercase;letter-spacing:.05em;border-left:4px solid var(--accent-color);padding-left:1rem}.matrix-container{overflow-x:auto;padding:1rem}table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums}th,td{padding:12px;text-align:center;border:1px solid rgba(255,255,255,.05);min-width:45px;transition:all .2s}th{color:var(--text-secondary);font-weight:400;font-size:.8rem}td{cursor:pointer;border-radius:4px;position:relative}.cell-label{position:absolute;top:2px;left:2px;font-size:.6rem;color:#000;font-weight:700;opacity:.7;z-index:2}.cell-corner{position:absolute;top:2px;right:2px;font-size:.65rem;color:var(--accent-color);font-style:italic;opacity:.8;z-index:1}.cell-active .cell-corner,.cell-source-1 .cell-corner,.cell-source-2 .cell-corner,.cell-source-3 .cell-corner{color:#0009}td:hover{background:#ffffff1a}.cell-active{background:var(--accent-color)!important;color:#000;font-weight:700}.cell-source-1{background:var(--highlight-1)!important;color:#000}.cell-source-2{background:var(--highlight-2)!important;color:#000}.cell-source-3{background:var(--highlight-3)!important;color:#000}.cell-source-group{background:#4ade804d;border:2px solid var(--highlight-3)}.details-section{display:flex;flex-direction:column;gap:2rem}.latex-box{font-family:Times New Roman,serif;font-size:1.5rem;padding:1rem;text-align:center;background:#0003;border-radius:.5rem;margin-bottom:1rem}.latex-box.highlight{color:var(--accent-color)}.active-formula{background:#38bdf833;border-radius:8px;padding:8px 12px;color:var(--accent-color);font-weight:700;border:1px solid var(--accent-color);margin:4px 0;transition:all .2s}.result-highlight{display:inline-block;margin-top:1rem;color:var(--highlight-3);font-size:1.8rem;font-weight:800}.cell-source-overlap{box-shadow:inset 0 0 0 4px var(--highlight-3)}#recurrence-formula div{padding:8px;border-radius:8px;transition:all .2s}#recurrence-formula div:hover{background:#ffffff0d}#visual-demo-container{height:300px;width:100%;display:flex;justify-content:center;align-items:center}canvas{max-width:100%;max-height:100%}.lang-box{margin-top:1rem;line-height:1.6}.lang-box.en{color:var(--text-secondary);font-style:italic;border-top:1px solid rgba(255,255,255,.1);padding-top:1rem}@media (max-width: 1024px){body{padding:1rem}h1{font-size:1.8rem}.content-grid{grid-template-columns:1fr}.controls{flex-direction:column;gap:1.5rem;align-items:stretch}.control-group{justify-content:space-between}input[type=range]{width:60%}.card{padding:1.25rem}.latex-box{font-size:1.1rem}.result-highlight{font-size:1.4rem}#visual-demo-container{height:250px}}@media (max-width: 640px){#mode-selector{gap:.5rem}.mode-btn{padding:.5rem 1rem;font-size:.85rem}h2{font-size:1.1rem}th,td{padding:8px;font-size:.85rem;min-width:40px}.cell-label,.cell-corner{font-size:.5rem}}