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            <a href="../" class="logo">less<span class="highlight">VM</span> 1.0.0</a>
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        <h1>Architecture</h1>

        <section>
            <h2>Overview</h2>
            <p>lessVM is a stack-based virtual machine designed specifically for the Solana blockchain. It features a simple instruction set with stack manipulation, arithmetic operations, memory access, control flow, and Solana-specific operations.</p>
        </section>

        <section>
            <h2>Core Components</h2>

            <div class="card">
                <h3>Stack</h3>
                <pre><code class="language-rust">#[repr(C, align(64))]
struct Stack {
    data: [Value; 32],
    top: usize,
}</code></pre>
                <ul>
                    <li>→ 32 entries deep</li>
                    <li>→ 64-bit values</li>
                    <li>→ LIFO (Last In, First Out)</li>
                    <li>→ Overflow protection</li>
                </ul>
            </div>

            <div class="card">
                <h3>Memory</h3>
                <pre><code class="language-rust">#[repr(C, align(64))]
struct Memory {
    data: [u8; 1024],
    size: usize,
}</code></pre>
                <ul>
                    <li>→ 1024 bytes linear memory</li>
                    <li>→ Bounds checking</li>
                    <li>→ Zero-initialized</li>
                    <li>→ Memory expansion tracking</li>
                </ul>
            </div>

            <div class="card">
                <h3>Gas Metering</h3>
                <pre><code class="language-rust">struct GasConfig {
    base_cost: u64,
    memory_cost: u64,
    solana_op_cost: u64,
    spl_op_cost: u64,
    cpi_cost: u64,
    gas_limit: u64,
}</code></pre>
                <ul>
                    <li>→ Operation-based costs</li>
                    <li>→ Memory expansion costs</li>
                    <li>→ CPI operation costs</li>
                    <li>→ Gas limit enforcement</li>
                </ul>
            </div>

            <div class="card">
                <h3>Program Counter</h3>
                <pre><code class="language-rust">struct VM {
    pc: usize,
    code: &[u8],
    // ...
}</code></pre>
                <ul>
                    <li>→ Instruction pointer</li>
                    <li>→ Sequential execution</li>
                    <li>→ Jump validation</li>
                    <li>→ Bounds checking</li>
                </ul>
            </div>
        </section>

        <section>
            <h2>Security Features</h2>
            <div class="card">
                <h3>Memory Safety</h3>
                <ul>
                    <li>→ Stack overflow protection</li>
                    <li>→ Memory bounds checking</li>
                    <li>→ Zero-initialized memory</li>
                </ul>
            </div>

            <div class="card">
                <h3>Account Safety</h3>
                <ul>
                    <li>→ Account ownership verification</li>
                    <li>→ Write permission checks</li>
                    <li>→ Lamport balance checks</li>
                </ul>
            </div>

            <div class="card">
                <h3>Execution Safety</h3>
                <ul>
                    <li>→ Gas metering</li>
                    <li>→ Jump target validation</li>
                    <li>→ CPI depth tracking</li>
                </ul>
            </div>
        </section>

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