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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
<meta name="description" content="Advanced Matrix Calculator - Perform complex matrix operations with step-by-step solutions. Perfect for students and engineers.">
<title>Nikhil's Matrix Lab| Advanced Matrix Calculator</title>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300;14..32,400;14..32,500;14..32,600;14..32,700&display=swap" rel="stylesheet">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css">
<link rel="stylesheet" href="style.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjs/11.10.0/math.js"></script>
</head>
<body>
<div class="app-container">
<header class="app-header">
<div class="logo-area">
<i class="fas fa-table-cells logo-icon" aria-hidden="true"></i>
<div>
<h1>Nikhil's Matrix Lab<span class="accent"></span></h1>
<p class="tagline">Smart Linear Algebra Toolkit</p>
</div>
</div>
<div class="header-controls">
<div class="step-toggle-group">
<span class="toggle-label" id="stepModeLabel"><i class="fas fa-code-branch" aria-hidden="true"></i> Step-by-Step</span>
<label class="switch">
<input type="checkbox" id="stepModeToggle" aria-labelledby="stepModeLabel">
<span class="slider round"></span>
</label>
</div>
<button type="button" id="themeToggleBtn" class="icon-btn" aria-label="Toggle dark or light mode">
<i class="fas fa-moon" aria-hidden="true"></i>
</button>
</div>
</header>
<main class="main-dashboard">
<div class="matrices-panel">
<div class="matrix-card glass-card">
<div class="matrix-card-header">
<h2><i class="fas fa-square" aria-hidden="true"></i> Matrix A</h2>
<div class="dimension-controls">
<div class="dim-control">
<label for="rowsA">Rows</label>
<input type="number" id="rowsA" min="1" max="6" value="3" step="1" inputmode="numeric">
</div>
<div class="dim-control">
<label for="colsA">Cols</label>
<input type="number" id="colsA" min="1" max="6" value="3" step="1" inputmode="numeric">
</div>
<button type="button" id="buildMatrixA" class="btn-outline small"><i class="fas fa-sync-alt" aria-hidden="true"></i> Build</button>
</div>
</div>
<div id="matrixAContainer" class="matrix-grid-container"></div>
<div class="matrix-actions">
<button type="button" id="setIdentityA" class="btn-ghost small"><i class="fas fa-eye" aria-hidden="true"></i> Identity</button>
<button type="button" id="setZeroA" class="btn-ghost small"><i class="fas fa-ban" aria-hidden="true"></i> Zero</button>
</div>
</div>
<div class="matrix-card glass-card">
<div class="matrix-card-header">
<h2><i class="fas fa-border-all" aria-hidden="true"></i> Matrix B</h2>
<div class="dimension-controls">
<div class="dim-control">
<label for="rowsB">Rows</label>
<input type="number" id="rowsB" min="1" max="6" value="3" step="1" inputmode="numeric">
</div>
<div class="dim-control">
<label for="colsB">Cols</label>
<input type="number" id="colsB" min="1" max="6" value="3" step="1" inputmode="numeric">
</div>
<button type="button" id="buildMatrixB" class="btn-outline small"><i class="fas fa-sync-alt" aria-hidden="true"></i> Build</button>
</div>
</div>
<div id="matrixBContainer" class="matrix-grid-container"></div>
<div class="matrix-actions">
<button type="button" id="setIdentityB" class="btn-ghost small"><i class="fas fa-eye" aria-hidden="true"></i> Identity</button>
<button type="button" id="setZeroB" class="btn-ghost small"><i class="fas fa-ban" aria-hidden="true"></i> Zero</button>
</div>
</div>
</div>
<div class="operations-panel">
<div class="ops-categories">
<div class="ops-group">
<h3><i class="fas fa-calculator" aria-hidden="true"></i> Basic</h3>
<div class="btn-group">
<button type="button" data-op="add" class="op-btn">A + B</button>
<button type="button" data-op="sub" class="op-btn">A - B</button>
<button type="button" data-op="mul" class="op-btn">A × B</button>
<button type="button" data-op="scalar" class="op-btn">Scalar × A</button>
<button type="button" data-op="transpose" class="op-btn">A<sup>T</sup></button>
</div>
</div>
<div class="ops-group">
<h3><i class="fas fa-chart-line" aria-hidden="true"></i> Intermediate</h3>
<div class="btn-group">
<button type="button" data-op="det" class="op-btn">det(A)</button>
<button type="button" data-op="inv" class="op-btn">A<sup>-1</sup></button>
<button type="button" data-op="trace" class="op-btn">trace(A)</button>
<button type="button" data-op="rank" class="op-btn">rank(A)</button>
<button type="button" data-op="minor" class="op-btn">Minor (i,j)</button>
<button type="button" data-op="cofactor" class="op-btn">Cofactor</button>
<button type="button" data-op="adjoint" class="op-btn">Adjoint(A)</button>
</div>
</div>
<div class="ops-group">
<h3><i class="fas fa-microchip" aria-hidden="true"></i> Advanced</h3>
<div class="btn-group">
<button type="button" data-op="ref" class="op-btn">REF (A)</button>
<button type="button" data-op="rref" class="op-btn">RREF (A)</button>
<button type="button" data-op="gauss_solve" class="op-btn">Solve Ax = b</button>
<button type="button" data-op="power" class="op-btn">A<sup>n</sup></button>
<button type="button" data-op="matrixDiv" class="op-btn">A / B</button>
<button type="button" data-op="lu" class="op-btn">LU Decomp</button>
</div>
</div>
<div class="ops-group">
<h3><i class="fas fa-atom" aria-hidden="true"></i> Linear Algebra</h3>
<div class="btn-group">
<button type="button" data-op="eigen" class="op-btn">Eigenvalues</button>
<button type="button" data-op="eigenvectors" class="op-btn">Eigenvectors</button>
<button type="button" data-op="diag" class="op-btn">Diagonalizable?</button>
<button type="button" data-op="charpoly" class="op-btn">Char. Polynomial</button>
</div>
</div>
<div class="ops-group">
<h3><i class="fas fa-check-double" aria-hidden="true"></i> Analysis & Checks</h3>
<div class="btn-group">
<button type="button" data-op="isSymmetric" class="op-btn">Symmetric?</button>
<button type="button" data-op="isSkew" class="op-btn">Skew-Sym?</button>
<button type="button" data-op="isOrthogonal" class="op-btn">Orthogonal?</button>
<button type="button" data-op="isSingular" class="op-btn">Singular?</button>
<button type="button" data-op="isPosDef" class="op-btn">Pos. Definite?</button>
</div>
</div>
</div>
<div class="result-area glass-card">
<div class="result-header">
<h3><i class="fas fa-microchip" aria-hidden="true"></i> Output</h3>
<div id="loadingIndicator" class="loading-badge hidden"><i class="fas fa-spinner fa-pulse" aria-hidden="true"></i> Computing...</div>
</div>
<div id="resultDisplay" class="result-box" aria-live="polite">
<p class="placeholder-text">Ready. Select an operation.</p>
</div>
<div id="stepsDisplay" class="steps-box">
<div class="steps-header"><i class="fas fa-list-ol" aria-hidden="true"></i> Step-by-step</div>
<div id="stepsContent" class="steps-content">Click toggle to enable step mode.</div>
</div>
<div id="errorBox" class="error-message hidden" role="alert"></div>
</div>
</div>
</main>
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<link rel="stylesheet"
href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css"/>
<footer class="footer">
<div class="footer-inner">
<div class="footer-brand">
<p class="footer-kicker">Developer Portfolio Build</p>
<h3>Advanced Matrix Calculator</h3>
<p class="footer-credit">Designed & Developed by <span>Nikhil</span> © 2026</p>
</div>
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