<!--
                   .GB~                                     I like people who inspect source.
                    :@B7                                     People who check under the hood, poke around,
                     ^&@:                                    aren't afraid to get their hands dirty. If
                      B@B     .:^~77..PG##&&&&&&BP7~.         that's you, you're in the right place. Send
                      ~@@GYP#&@@@@@@~ P@@@@@@@@@@@@@?          me an email and mention Uncle Sam - I'd
                      ?@@@@@@@@@@@@P   ^BBGG#@@@@#Y#~            love to hear from you.
                       5@@@@@@&P!:.       .J&@@@@B^..                                               
                        ~?P@@@@@#J.       G@@@@@@@@Y     ... :!.                                    
                         Y@@@@@@@@#  .::.  5@@@@@@@B^G5 ...~G@@J                                    
                      ::.&@@@@@@@@!.5@@@@&5:?@@#B5?:~7?JP#@@@@G:.                                   
            .:~7JYGGPJ#@J.Y&&&&&B?.BBGB#PYJ!.!??YG#&@@@@@@@@@@#?&B:                                
            ^#@@@@@@@@@@@&GPYJJJ??Y5Y5GGB#&@@@@@@@@@@@@@@@@@@@@@@@&                                 
             ^&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@##GYJ!!#@@@@@PP5GB#BJP!                                 
              .5&@@@@@@@@@@@@@&57^^^^^^!J&~    ^BP5&@@@@@.                                          
                ^&@@@@@@@@@@@@P5B#&P^.^.~^JYB@&@@@@@@@?J@B  B&P  .                                  
                ~PGB#@@@@@@@@@@@@@&&@@@@J #@@@@!:~@@&7 G@B.?@@G.B~                                  
                G@@@@@@@@@@@@G&@57.:!5@@^  &#:J~..5?  7@@..~..!#5                                   
                Y&B^#@@@@@@@P..55^    .B~  .^    .    Y@@5@@&Y!                                     
                 .:P@@@@@@@@#:..      .~   ..    .~~Y@@B&@@@@@G.                                   
                   ~@@@@@@@@@@@@&:   .^..  ~@7   ^@@G:&Y@@@@@@@@^                                  
                  .@@@@@@@@@@@@@B.    J@@@YY@?:   BG ~&.:Y&@@@@@@^                                 
                  .@@@@@@@@@@@@&^P     .J#&#?      .  B^  .#@@@@@@@#7.:^..                          
            .!JPB&&@@@@@@@@@@@@@G.   .....:^...^7~   BB  ?@@@@@@@@@@@@@@@@&#BP5?:                  
      ~~..5&@@@@@@@@@@@@@@@@@@@@@P  :!^G@#GG5#&~..  :@BJ&@@@@@@@@@@@@@@@@@@@@@@@@&P~!B&&P^          
    .B@@@@@@@@@@@@@@@@@@@@@@@@@@@@5.   .?@@@@@? .^  7~P@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@?         
    G@@@@@@@@@@@@@@@@@@@@@@@@@@@@&@@G?G:!?75^   .!:.J&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@B:      
   .@@@@@@@@@@@@@@@@@@@@@@@@@@@P^. ^?5&@#&       Y@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@G       
   .@@@@@@@@@@@@@@@@@@@@@@@@@&^BG?..5:?J##. :.   7@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@Y.     
   .@@@@@@@@@@@@@@@@@@@@@@@@@^.&@G&.B?B~!:#&@B !~^&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@J    
   ~@@@@@@@@@@@@@@@@@@@@@@@@P^ J@@@@@^  . ^7Y@&@~ ?@@&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@~   
  J@@@@@@@@@@@@@@@@@@@@@@@@J~#GB@@@@@@BGPYY^~@@#. ~JJ ^7JP&G^.#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@#   
  !@@@@@@@@@@@@@@@@@@@@@@@@:^: .7PBG!^^75GB&@@#. Y           B@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&   
   P@@@@@@@@@@@@@@@@@@@@@@J#@@G^ 7G#@#P~:::^5&G.  !.          Y@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@B5~ 
    &@@@@@@@@@@@@@@@@@@&P?.@@@@: ..?PBB#&&@@7 : .^          7@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&@& 
  ^P@@@@@@@@@@@@@@@@@@J^.  &@@@&P?^:^. .~!?@&  ^? .:         7@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@& 
 G@@@@@@@@@@@@@@@@@@Y. J^  #@@@@@@@@@@@@@@@@~   :            7@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@? 
 ?@@@@@@@@@@@@@@@@&.   G~ :@@@@@@@@@@@@@@@@@J  !GP!           Y@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&!YG
  J@@@@@@@@@@@@@@@!    ?B J@@@@@@@@@@@@@@@@@^  J@@B           &@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@5 ^@@
  7@@@@@@@@@@@@@@&     .5~#@@@@@@@#G@@@@@@@@:   .           .@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@G  &@&
 ?@@@@@@@@@@@@@@@?       B@@@@@@@~:#P@@@@@@@.                ^@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@B  ?@@5
:@@@@@@@@@@@@@@@@~       .&@@@@@P. Y5&@@@@@@.                ^@@@@@@@@@@@@@@@@@@@@@@@@@@Y@@@?  !@@&.
?@@@@@@@@@@@@@@@@7        .&@@B7   :7&@@@@@&                 ^@@@@@@@@@@@@@@@@@@@@@@@@#7 .:. .5@@&:
P@@@@@@@@@@@@@@@@#        .@@Y .!YB@@@@@@@@&                 .@@@@@@@@@@@@@@@@@@@@@@@@@^     .B#?.  
!@@@@@@@@@@@@@@@@@.       YY  J&@@@@@@@@@@@@!                 &@@@@@@@@@@@@@@@@@@@@@@@@7            
B@@@@@@@@@@@@@@@@@&7    ... .P@@@@@@@@@@@@@@@^                &@@@@@@@@@@@@@@@@@5@@@@@@7            
@@@@@@@@@@@@@@@@@@@@#?!B&  ~G5@@@@@@@@@@@@@@@@:             :@@@@@@@@@@@@@@@@@P#@@@7^@7            
P@@@@@@@@@@@@@@@@@@@@@@@P  ^5&@@@@@@@@@@@@@@@@#              .@@@@@@@@@@@@@@@@&^??B^  P7            
-->

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  
  <!-- Primary Meta Tags -->
  <title>ARK</title>
  <meta name="title" content="ARK COMPUTERS">
  <meta name="description" content="Mankind's knowledge, built to survive. Hardened, airgapped, self sufficient computers designed to preserve humanity's knowledge in a robust and accessible format.">
  
  <!-- Open Graph / Facebook -->
  <meta property="og:type" content="website">
  <meta property="og:url" content="https://arkcomputers.xyz/">
  <meta property="og:title" content="ARK COMPUTERS">
  <meta property="og:description" content="Mankind's knowledge, built to survive. Hardened, airgapped, self sufficient computers designed to preserve humanity's knowledge in a robust and accessible format.">
  <meta property="og:image" content="https://arkcomputers.xyz/resources/ark1-bw-50.webp">

  <!-- Twitter -->
  <meta property="twitter:card" content="summary_large_image">
  <meta property="twitter:url" content="https://arkcomputers.xyz/">
  <meta property="twitter:title" content="ARK COMPUTERS">
  <meta property="twitter:description" content="Mankind's knowledge, built to survive. Hardened, airgapped, self sufficient computers designed to preserve humanity's knowledge in a robust and accessible format.">
  <meta property="twitter:image" content="https://arkcomputers.xyz/resources/ark1-bw-50.webp">

  <link rel="icon" href="./resources/favicon.ico">
  <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Ubuntu+Mono&display=swap">
  <script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script>
  <script src="https://js.stripe.com/v3/"></script>
  <style>
    .content-section {
      max-width: 1200px;
      margin: 0 auto;
    }

    .about-section .content {
      text-align: center;
      width: 100%;
    }

    .about-section .content p {
      max-width: 800px;
      margin: 0 auto;
      text-indent: 0;
      text-align: center;
    }

    .content ul {
      text-align: left;
      list-style-position: inside;
      margin-left: 0;
      padding-left: 0;
    }

    .content ul li {
      text-align: left;
      margin-left: 0;
      padding-left: 0;
    }

    .email-signup input[type="email"] {
      font-family: inherit;
      background-color: black;
      color: white;
      border: 1px solid white;
      padding: 8px;
      height: 20px;
      vertical-align: middle;
      box-sizing: content-box;
      border-radius: 0 !important;
      -webkit-border-radius: 0;
      -webkit-appearance: none;
      -moz-appearance: none;
      appearance: none;
    }

    .email-signup input[type="email"]:focus {
      border-radius: 0 !important;
      -webkit-border-radius: 0;
      outline: none;
    }

    .email-signup button {
      background-color: black;
      border: 1px solid white;
      padding: 8px;
      cursor: pointer;
      height: 20px;
      vertical-align: middle;
      box-sizing: content-box;
    }

    .email-signup button img {
      width: 20px;
      height: 20px;
      vertical-align: middle;
      display: block;
    }

    /* Global Styles */
    :root {
      /* adjust these variables as needed */
      --base-font: 'Ubuntu Mono', monospace;
      --base-size: 0.75rem;
      /* roughly 12px */
      --content-size: 1.1rem;
      /* roughly 17.6px */
      --spacing: 1rem;
    }

    body {
      background-color: #000;
      color: #fff;
      font-family: var(--base-font);
      margin: 0;
      padding: 0;
      text-align: center;
      font-size: var(--base-size);
    }

    /* Hero Section */
    .hero-section {
      background: url('./resources/ark1-bw-50.webp') center/cover no-repeat;
      min-height: 50vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 1.5rem;
    }

    .hero-content {
      background-color: rgba(0, 0, 0, 0.6);
      padding: 1.5rem;
      border: 0.0625rem solid #fff;
    }

    .hero-content p {
      font-size: 1.2em;
      margin: 0.5rem 0;
    }

    /* Content and Layout */
    .content-section {
      display: flex;
      flex-direction: column;
      gap: 1rem;
      padding-bottom: 5rem;
    }

    .section-container {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .content {
      flex: 1;
      max-width: 50rem;
      font-size: var(--content-size);
    }

    .content ul {
      padding-left: 1.25rem;
      margin-left: 0;
    }

    .content ul li {
      margin-bottom: 0.5rem;
    }

    /* Media-independent Images */
    .ark2-image {
      width: 100%;
      max-width: 20rem;
      /* ~500px */
      height: auto;
    }

    /* Typography & Preformatted Text */
    pre {
      font-size: var(--base-size);
      line-height: 1.2;
      white-space: pre;
    }

    h1 {
      margin-bottom: 2rem;
    }

    /* About and Signup Sections */
    .about-section {
      display: flex;
      justify-content: center;
      padding: 3rem 0;
    }

    .email-signup-section {
      padding: 2rem 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 1rem;
    }

    /* Terminal Section */
    .terminal-section {
      width: 80%;
      max-width: 60rem;
      margin: 0 auto;
    }

    /* Terminal Component */
    .terminal {
      background-color: #000;
      border: 0.0625rem solid #fff;
      width: 100%;
      height: 37.5rem;
      overflow-y: auto;
      text-align: left;
      font-family: var(--base-font);
    }

    .terminal-content {
      color: #fff;
      white-space: pre-wrap;
      text-align: left;
    }

    /* Terminal Content Overrides */
    .terminal-content>* {
      margin: 0 0 0 0;
      padding: 0 0 0 1em;
    }

    .terminal-content ul,
    .terminal-content ol>* {
      margin: 0 0 0 0;
      padding: 0 0 0 4em;
    }

    .terminal-content p>* {
      margin: 0 0 0 0;
      padding: 0 0 0 1em;
    }

    .terminal-content hr>* {
      margin: 0 0 0 0;
      padding: 0 0 0 0;
      border-color: #333;
    }
    .terminal-header {
      max-width: 50rem;
      margin: 0 auto;
      font-size: var(--content-size);
    }

    .query {
      padding-top: 1em;
      font-style: italic;
      font-weight: bold;
    }


    /* Terminal Tabs */
    .terminal-tabs {
      display: flex;
      width: 100%;
    }

    .tab-button {
      background-color: #000;
      color: #fff;
      border: 0.0625rem solid #fff;
      padding: 0.6125rem 0.625rem;
      cursor: pointer;
      font-family: var(--base-font);
      font-size: var(--base-size);
      margin: 0;
      margin-left: -0.0625rem;
      /* so the tab button borders overlap horizontally */
      margin-bottom: -0.0625rem;
      /* so the tab bottom overlaps with the terminal border */
      flex: 1;
    }

    .terminal-tabs .tab-button:first-child {
      margin-left: 0;
    }
    .terminal-tabs .tab-button:not(:first-child) {
      margin-left: -0.0625rem;
    }

    *, *::before, *::after {
      box-sizing: border-box;
    }

    .tab-button:hover {
      background-color: #444;
    }

    .tab-button.active {
      background-color: #fff;
      color: #000;
      border-color: #fff;
    }

    /* Cursor Animation */
    @keyframes blink {

      0%,
      100% {
        opacity: 1;
      }

      50% {
        opacity: 0;
      }
    }

    .cursor {
      display: inline-block;
      width: 0.1rem;
      height: 0.9375rem;
      background-color: #fff;
      margin-left: 0.0625rem;
    }

    /* Mobile Specific Styles */
    @media (max-width: 75rem) {
      .section-container {
        flex-direction: column;
        text-align: center;
      }

      .ark2-image {
        order: -1;
      }

      .content ul {
        text-align: center;
        list-style-position: inside;
      }

      .content {
        width: 100%;
        padding: 0 1.25rem;
        box-sizing: border-box;
      }
    }

    @media (max-width: 37.5rem) {
      pre {
        font-size: 0.625rem;
      }

      .terminal-section {
        width: 95%;
        max-width: none;
      }
    }

    /* Footer Styles */
    footer {
      background-color: #000;
      color: #fff;
      text-align: center;
      padding: 1rem 0;
      border-top: 1px solid #fff;
      margin-top: 2rem;
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 2rem;
      position: relative;
      min-height: 60px;
    }

    footer a {
      color: #fff;
      text-decoration: none;
    }

    footer a:hover {
      text-decoration: underline;
    }

    footer .email-signup {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.5rem;
    }

    /* Style for links to appear as normal text */
    .content a {
      color: inherit; /* Inherit the color from the parent element */
      text-decoration: none; /* Remove underline */
    }

    .content a:hover {
      text-decoration: underline; /* Optional: Add underline on hover for clarity */
    }

    /* Deposit Button Styles */
    .deposit-button {
      background-color: #000;
      color: #fff;
      border: 1px solid #fff;
      padding: 12px 24px;
      cursor: pointer;
      font-family: var(--base-font);
      font-size: var(--content-size);
      transition: background-color 0.2s;
    }

    .deposit-button:hover {
      background-color: #fff;
      color: #000;
    }


    /* Make all bottom section text consistent */
    .section-container .content.email-signup p,
    .section-container .deposit-section p,
    .section-container .content p {
      font-size: 1.2rem;
    }

  </style>
</head>

<body>
  <div class="hero-section">
    <div class="hero-content">
      <h1>ARK COMPUTERS</h1>
      <p>Mankind's knowledge, built to survive.</p>
      <p>Hardened, airgapped, self sufficient.</p>
    </div>
  </div>
  <div class="content-section">
    <!-- About Section -->
    <div class="section-container about-section">
      <div class="content">
        <h1>About ARK 1</h1>
        <p>
          ARK 1 is a computer designed to preserve humanity's knowledge in a robust and accessible format. Built with
          redundant &amp; error corrected components and housed in an EMF &amp; shock hardened enclosure, ARK 1 is made
          to survive. ARK 1 can answer technical questions, provide references, and search the <b>Archive</b> - all
          completely offline.
        </p>
      </div>
    </div>

    <!-- Deposit Section -->
    <!-- <div class="terminal-header">
      <hr style="width: 50%; margin: 2rem auto; border: none; border-top: 1px solid #fff;">
      <div class="content">
        <p>Place a Refundable Deposit to secure your spot on the waitlist</p>
        <div class="deposit-button-container">
          <button id="depositButton" class="deposit-button" onclick="handleDeposit()">
            Place Deposit
          </button>
        </div>
      </div>
      <hr style="width: 50%; margin: 2rem auto; border: none; border-top: 1px solid #fff;">
    </div> -->

    <!-- Waitlist Email Signup Section -->
    <div class="terminal-header">
      <!-- <hr style="width: 50%; margin: 2rem auto; border: none; border-top: 1px solid #fff;"> -->
      <div class="content email-signup">
        <p>Secure your spot on the waitlist</p>
        <div class="email-input-container">
          <input type="email" id="emailInput" placeholder="Enter your email"
            onkeypress="if(event.key === 'Enter') submitEmail()">
          <button id="submitButton" onclick="submitEmail()">
            <img src="./resources/paperplane.png" alt="Send">
          </button>
        </div>
      </div>
      <!-- <hr style="width: 50%; margin: 2rem auto; border: none; border-top: 1px solid #fff;"> -->
    </div>
    <br>
    <br>

    <!-- Features Section -->
    <div class="section-container">
      <img src="./resources/case-mock-60.png" alt="ARK 2 Computer" class="ark2-image">
      <div class="content">
        <h2>Key Features</h2>
        <ul>
          <li>Ships with the <b>Archive</b>, containing much of mankind's technical, scientific, and cultural knowledge
          </li>
          <li>Runs SOTA LLMs at 100+ tokens per second</li>
          <li>Provides a framework for LLMs to reference and search the <b>Archive</b></li>
          <li>Hardened against electromagnetic pulses (EMP)</li>
          <li>Blast and shock resistant</li>
          <li>Complete air-gap isolation for maximum security</li>
          <li>Redundant &amp; error-corrected storage &amp; memory</li>
        </ul>
      </div>
    </div>

    <!-- Terminal Section -->
    <div class="terminal-header">
      <h2>Some Examples</h2>
      <p>
        ARK 1 makes it easy to answer crucial technical & informational questions, and provides references (↗) to the <b>Archive</b> to enable further research into source material, all without access to the internet. The examples below show the approximate tokens/second performance of ARK 1:
      </p>
    </div>
    <div class="terminal-section">
      <div class="terminal-tabs">
        <button class="tab-button active" onclick="switchTab('Semiconductor Manufacturing')">Semiconductor Manufacturing</button>
        <button class="tab-button" onclick="switchTab('Iron & Steel')">Iron & Steel</button>
        <button class="tab-button" onclick="switchTab('Physics Experiments')">Physics Experiments</button>
      </div>
      <div class="terminal-tabs">
        <button class="tab-button" onclick="switchTab('Generator Maintenance')">Generator Maintenance</button>
        <button class="tab-button" onclick="switchTab('Firewood Storage')">Firewood Storage</button>
        <button class="tab-button" onclick="switchTab('Air Filter')">Air Filter</button>
        <button class="tab-button" onclick="switchTab('Pesticide Replacements')">Pesticide Replacements</button>
      </div>
      <div class="terminal" id="terminal">
        <div class="terminal-content"></div>
      </div>
    </div>

    <!-- Specs Section -->
    <div class="section-container">
      <div class="content">

        <h2>Specs</h2>
        <ul>
          <li>Exterior Blast & EMF Resistant Enclosure</li>
          <li>16-core Server Grade CPU</li>
          <li>GPU Compute Package with 96GB VRAM capable of running large SOTA OSS models</li>
          <li>256GB of Error Corrected DDR4 Memory</li>
          <li>8TB of Combined Redundant Storage Running in RAID 6</li>
        </ul>
      </div>
      <img src="./resources/ark2-color-2.webp" alt="ARK 2 Computer" class="ark2-image">
    </div>

    <div class="section-container">
      <!-- <div class="content email-signup">
        <p>Sign up for email updates</p>
        <div class="email-input-container">
          <input type="email" id="emailInput" placeholder="Enter your email"
            onkeypress="if(event.key === 'Enter') submitEmail()">
          <button id="submitButton" onclick="submitEmail()">
            <img src="./resources/paperplane.png" alt="Send">
          </button>
        </div>
      </div> -->
      <div class="content">
        <p>Contact: <a href="mailto:info@arkcomputers.xyz">info@arkcomputers.xyz</a></p>
      </div>
    </div>
  </div>

  <script>
    // Add these new functions at the start of the script section
    async function sendEvent(eventType, details = {}) {
        try {
            const formData = new FormData();
            formData.append('type', eventType);
            formData.append('timestamp', new Date().toISOString());
            formData.append('details', JSON.stringify(details));
            
            await fetch('https://api.arkcomputers.xyz/event', {
                method: 'POST',
                mode: 'no-cors',
                body: formData
            });
        } catch (error) {
            console.error('Error sending event:', error);
        }
    }

    // Call this when page loads
    window.addEventListener('load', () => {
        sendEvent('page_load');
    });

    // Terminal content examples
    const TERMINAL_EXAMPLES = {
      'Physics Experiments': {
        query: 'What were the most important historical experimental results that have contributed to our modern understanding of physics?',
        response: `Experiments have been the crucible in which physical theories are tested and refined. Below are some of the most pivotal experimental results that paved the way to our modern understanding of physics:

- **Galileo's inclined-plane experiment (c. 1600)**  
  By timing steel balls rolling down a smooth ramp with a water clock, Galileo demonstrated that distance \(d\) is proportional to the square of the time \(t\) (\(d\propto t^2\)), overturning Aristotle's view that heavier bodies fall faster. This established the concept of *uniform acceleration* under gravity ↗

- **Newton's prism experiments (1665-1666)**  
  Using triangular glass prisms, Isaac Newton decomposed white light into its constituent colors and then recombined them, showing that color is a property of light itself rather than an artifact of the prism. This laid the foundation for *wave optics* and later quantum descriptions of light ↗

- **Cavendish torsion-balance experiment (1798)**  
  Henry Cavendish measured the tiny gravitational attraction between lead spheres using a torsion balance, yielding the first accurate value of the gravitational constant \(G\) and thus the Earth's density. It provided the empirical basis for Newton's law of universal gravitation ↗

- **Ørsted's compass-and-wire experiment (1820)**  
  Hans Christian Ørsted observed that a current-carrying wire deflects a nearby compass needle, revealing for the first time that *electricity and magnetism* are interlinked. This discovery was the cornerstone of classical electromagnetism ↗

- **Faraday's electromagnetic-induction experiments (1831)**  
  Michael Faraday showed that a changing magnetic flux through a coil induces an electromotive force (EMF) and hence a current. His law of induction became one of Maxwell's equations, unifying electricity and magnetism into a single field theory ↗

- **Michelson-Morley aether drift experiment (1887)**  
  Albert A. Michelson and Edward W. Morley detected no difference in the speed of light due to Earth's motion through the "luminiferous aether." This *null result* undermined aether theories and set the stage for Einstein's special relativity ↗

- **Rutherford's gold-foil scattering (1911)**  
  Ernest Rutherford and colleagues found that a small fraction of alpha particles were deflected at large angles when passing through thin gold foil. This led to the *nuclear model* of the atom, with a tiny, dense, positively charged nucleus surrounded by electrons ↗

- **Millikan's oil-drop experiment (1909-1910)**  
  Robert A. Millikan measured the charge \(e\) on individual oil droplets suspended in an electric field, determining the *elementary charge* to high precision. This confirmed the quantization of electric charge and the reality of electrons as discrete particles ↗

- **Davisson-Germer electron diffraction (1927)**  
  Clinton Davisson and Lester Germer observed diffraction patterns when electrons scattered off a nickel crystal, directly confirming de Broglie's hypothesis that *matter has wave properties*. This experiment launched wave mechanics ↗

- **Compton scattering (1923)**  
  Arthur H. Compton measured the increase in wavelength of X-rays scattered by electrons, conclusively demonstrating that *light behaves as particles* (photons) with momentum \(p = h/\lambda\). This was a key proof of quantum electrodynamics ↗

- **Stern-Gerlach quantization of spin (1922)**  
  Otto Stern and Walther Gerlach passed silver atoms through an inhomogeneous magnetic field and observed discrete beam splitting. They revealed that *angular momentum (spin) is quantized*, a cornerstone of quantum theory ↗

- **Einstein's analysis of Brownian motion (1905) & Perrin's experiments**  
  Einstein's theory predicted the random wandering of suspended particles due to molecular impacts. Jean Baptiste Perrin's subsequent measurements confirmed the *existence of atoms and molecules*, settling debates over atomic theory ↗

- **Penzias-Wilson detection of the cosmic microwave background (1964)**  
  Arno Penzias and Robert Wilson found a uniform microwave "noise" at 3.5 K while calibrating a radio antenna. This *cosmic microwave background (CMB)* provided striking evidence for the Big Bang model of cosmology ↗

- **LIGO's first detection of gravitational waves (2015)**  
  The Laser Interferometer Gravitational-Wave Observatory (LIGO) measured minute spacetime ripples from a binary black hole merger (GW150914). This was the first *direct observation* of gravitational waves, confirming the last untested prediction of general relativity ↗

Together, these landmark experiments forged the pillars of classical mechanics, electromagnetism, relativity, quantum mechanics, and cosmology, guiding us to the rich, experimentally grounded framework of modern physics.
`
      },
      'Iron & Steel': {
        query: 'How can iron ore be found, identified, and then refined into steel using pre-industrial methods?',
        response: `Here's a step-by-step overview of how, in a truly pre-industrial setting, you would (1) locate and sample iron ore, (2) identify it in the field, (3) smelt it to a workable iron bloom, and (4) convert that bloom into steel via charcoal-based processes.

---

## 1. Locating Iron Ore

- **Geological clues**  
   - **Outcrops & weathering:** Iron ores like hematite (Fe₂O₃) and magnetite (Fe₃O₄) often form in banded iron formations or as "gossans" where sulfide ores have oxidized. Look for rusty-red or ochre soils staining bedrock.  
   - **River gravels & cobbles:** Erosion liberates dense iron pebbles into stream beds. Pan for heavy, dark stones ("black sand")—these often concentrate magnetite.

- **Surface signs of ancient mining**  
   - In old ironworking regions you may find spoil heaps or shallow pits. These often mark where earlier peoples extracted ore.

- **Simple tools for prospecting**  
   - **Magnet:** Even a small lodestone will strongly draw magnetite.  
   - **Hammer & chisel:** Break out fresh rock from an outcrop to see unweathered color and texture.

---

## 2. Identifying Iron Ore
 
- **Visual & tactile tests**  
   - **Color & streak:**  
     - Hematite: steel-gray to black on outside, but red-brown streak.  
     - Magnetite: black with black streak.  
   - **Weight:** Both are notably heavy ("high specific gravity").  
 
- **Magnetic test**  
   - Magnetite will cling strongly to a lodestone or simple hand magnet; hematite only weakly.
 
- **Hardness & fracture**  
   - Both ores are around 5-6 on Mohs scale; will scratch glass. Conchoidal to uneven fracture—unlike most common stones.
 
- **Hand sample assay**  
   - Crush a tiny chip, then heat with charcoal—ore that yields metallic beads indicates reducible iron oxide.

---

## 3. Smelting Iron Ore to a Bloom

### A. Building a Bloomery Furnace

- **Materials:** 
  - Clay or stone to form a shaft ~30-60 cm tall, 20-30 cm diameter.
  - Charcoal (not wood): must be low in moisture and ash.
  - Bellows or tuyère: wooden pipe and leather bags to deliver a strong blast of air.

- **Construction steps:**  
  1. Erect a conical or tapering shaft of packed clay or stone.  
  2. Install a single tuyère hole ~10-15 cm above the base for air injection.  
  3. Surround with support bricks to allow tapping slag.

### B. Firing & Charging
 
- **Pre-heat:** Build a small charcoal fire and bring up the furnace to bright red (>700 °C).   
- **Alternate ore & charcoal in layers:**  
   - Typical charge ratio ≈ 1 part ore : 1.5-2 parts charcoal by weight.   
- **Maintain air blast:** Continuous, vigorous bellows action to drive temperature to ~1100-1200 °C (below iron's melting point).

### C. Forming & Removing the Bloom

- After 4-8 hours of charging, a spongy mass of metallic iron and slag ("bloom") accumulates at the bottom.  
- **Tapping slag:** Lower the bellows, allow slag to drain or break out small sections of the furnace.  
- **Extraction:** When performance drops, quench the interior, pull out the bloom (still hot), and wrap in insulating material (hay or earthen embers) to retain heat for forging.

---

## 4. Refining Wrought Iron into Steel

Two classic pre-industrial routes:

### 4.1 Carburization (Cementation → "Blister Steel")
 
- **Starting material:** Long, drawn bars of wrought iron (very low carbon).   
- **Pack in charcoal:** Place in a sealed stone or clay box, surrounded by powdered charcoal.   
- **Heat soak:** Maintain at red heat (≈ 900-950 °C) for 5-7 days.  
   - Carbon from charcoal diffuses into the iron surface, creating a gradient from low-C core to ~1 % C at surface.   
- **Result:** Bars swell and blister (CO₂ bubbles) — hence "blister steel."  

#### Further refinement (Optional: Crucible Steel)

- **Cut & charge:** Break blister bars into small pieces, pack into a covered clay or graphite crucible.  
- **Melt:** Heat to full melting (~1400 °C) to homogenize carbon.  
- **Cool & forge:** Yield a fine-grained cast steel ingot, ready to forge into tools.

### 4.2 Bow-Hammer Method (Direct Carburization)

- **Solid fuel forge:** Forge a wrought-iron bar, then re-heat in charcoal under a sealed hood, tapping rhythmically with a "bow-hammer" to work surface carbon inward.  
- **Repeat cycles:** Alternate heating in charcoal and heavy forging to distribute carbon.  
- **Outcome:** A "case-hard" surface and mid-carbon steel core.

---

## 5. Final Forging & Tempering
 
- **Forge to shape:** Draw out the steel bloom or ingot into bars, plates, or tool blanks.   
- **Heat-treat:**  
   - **Austenitize:** Heat steel to non-magnetic red (≈ 800-850 °C).  
   - **Quench:** Rapidly cool in water or oil to trap a martensitic structure.  
   - **Temper:** Re-heat to 200-400 °C to relieve brittleness and adjust hardness.

---

**Key takeaways:**  
- **Ore prospecting** relies on surface clues, magnets, and simple assays.  
- **Bloomery smelting** produces wrought iron by reducing ore in a charcoal furnace at sub-melting temperatures.  
- **Steel-making** pre-industrially depends on carbon infusion (cementation or direct forging) and careful heat-treatment.  

With only stone, clay, charcoal, bellows, hammers, and forges, early metallurgists achieved everything from ax heads to finely tempered sword blades—proof that the cradle of industry really was wood- and charcoal-fired.`
      },
      'Semiconductor Manufacturing': {
        query: 'Tell me about early semiconductor manufacturing, and how simple semiconductors might be constructed if starting from scratch now?',
        response: `## Early Semiconductor Manufacturing
### Pre-Transistor Era
Long before transistors, semiconductors were used as detectors and rectifiers In 1874, Karl Ferdinand Braun observed conduction and rectification in metallic sulfides—early "cat's-whisker" detectors made from galena—laying the groundwork for solid-state electronics ↗


### Invention of the Transistor
On December 23, 1947, John Bardeen and Walter Brattain, under William Shockley's direction at Bell Labs, demonstrated the first working point-contact transistor using germanium, capable of amplifying electrical signals and offering a compact, reliable alternative to vacuum tubes Shockley then developed the more robust bipolar junction transistor in 1948, which entered production in the early 1950s and became the cornerstone of modern electronics ↗


### Early Mass-Production Techniques
By 1951, the germanium alloy-junction transistor—where indium and antimony beads were fused onto an N-type germanium bar—became the predominant method for making bipolar transistors in bulk, thanks to its relative ease of manufacture, despite performance trade-offs at high frequencies ↗


### The Planar Process and Photolithography
An accidental oxidation discovery by Carl Frosch and Lincoln Derick in 1955 led to the first silicon-dioxide masking techniques Building on this, Jean Hoerni at Fairchild Semiconductor invented the planar process in 1959, enabling patterned diffusion and photolithographic masking that made mass production of reliable, miniaturized transistors possible ↗

---

## Constructing Simple Semiconductors from Scratch Today

### Clean Environment
Even the simplest semiconductor fabrication demands protection from particle contamination Hobbyist cleanboxes or gloveboxes can be built for under $1,000 using HEPA-filtered air curtains and sealed chambers to approximate a cleanroom environment ↗


### Photolithography
Instead of multi-million-dollar steppers, a modified DLP projector—stripped of its UV filter and fitted with a condensing lens—can project circuit patterns onto photoresist-coated wafers, providing resolution down to a few microns for educational or prototyping purposes ↗


### Doping and Diffusion
Spin-on dopant liquids (e.g., phosphorus- or boron-based) can be applied to the wafer surface and driven in using a small tube furnace at ~1,000 °C. This "bake-in" step creates P-N junctions; an approach successfully demonstrated in a home garage, where a DIY furnace and acid etch yielded working transistors ↗


### Etching and Metallization
Wet chemical etchants like KOH or buffered HF can selectively strip oxide layers or silicon, while simple metal deposition can be achieved with thermal evaporation rigs or conductive inks (e.g., silver paste) applied through stencil masks. Wire-bonding may be replaced by conductive epoxies for interconnects ↗


Together, these low-cost, accessible methods mirror the fundamental steps of historical semiconductor manufacturing—material purification, oxidation, patterning, doping, etching, and metallization—scaled down for modern DIY exploration`
      },
      'Generator Maintenance': {
        query: 'What preventative maintenance should I perform on my diesel generator?',
        response: `Preventative maintenance on a diesel generator is crucial to ensure reliability, efficiency, and longevity. Here's a comprehensive maintenance checklist broken down by frequency:

---

### **Daily or Before Each Use**
- **Check fuel levels**
- **Check oil level ↗**
- **Check coolant level ↗**
- **Inspect for leaks ↗** (oil, fuel, coolant)
- **Check battery voltage and terminals** for corrosion or loose connections
- **Inspect belts and hoses ↗** for wear or cracks
- **Look for warning lights or error codes** on the control panel
- **Listen for abnormal noises** when running

---

### **Weekly**
- **Run the generator under load ↗** (at least 30 minutes) to prevent wet stacking and ensure everything works properly
- **Check and record operating parameters** (voltage, frequency, load, temperature)
- **Test automatic transfer switch (ATS) ↗** if equipped

---

### **Monthly**
- **Inspect air filters**; clean or replace if needed
- **Check fuel-water separator ↗** and drain water if present
- **Inspect exhaust system ↗** for soot, leaks, or damage
- **Test battery and charging system ↗**
- **Clean generator exterior**

---

### **Quarterly or Every 100 Hours (whichever comes first)**
- **Change engine oil and oil filter ↗**
- **Replace fuel filters ↗** (primary and secondary)
- **Check valve clearances** (if applicable)
- **Inspect and clean crankcase breather**
- **Check coolant concentration** and condition

---

### **Annually or Every 250-500 Hours**
- **Change coolant** or test and add inhibitor as needed
- **Pressure test cooling system**
- **Inspect/replace air filter**
- **Inspect alternator and voltage regulator**
- **Inspect control panel components and wiring**
- **Load test battery ↗**
- **Perform full system load bank test ↗**

---

### **Additional Tips**
- **Keep a maintenance log** with dates, hour meter readings, and work performed
- **Store diesel with a stabilizer** and consider fuel polishing for long-term storage
- **Train personnel** on emergency procedures and basic troubleshooting`
      },
      'Firewood Storage': {
        query: 'How long should chopped wood be stored before being used as firewood?',
        response: `Chopped wood should typically be seasoned (dried) for about 6 to 12 months before being used as firewood. The goal is to reduce the moisture content to around 15-20%, which ensures it burns efficiently and safely.

### Here's a general timeline:
- **Softwoods (e.g., pine, fir) ↗**: Usually take **6-12 months** to season.
- **Hardwoods (e.g., oak, maple) ↗**: Often need **12-24 months** due to their higher density and moisture content.
### Tips for seasoning wood faster:
- Split the wood as soon as possible after cutting.
- Stack it in a single row, off the ground, with good air circulation.
- Keep the stack covered on top (e.g., with a tarp or woodshed roof) but leave the sides open.
- Place the stack in a sunny, breezy location.
`
      },
      'Air Filter': {
        query: 'How can I construct a DIY air filter with household materials?',
        response: `Building a DIY air filter with household materials is surprisingly simple and can be effective for reducing dust, smoke, and allergens in a small space. Here's a basic, low-cost method using items you can usually find at home or a nearby store.

---

### DIY Box Fan Air Filter

**What You'll Need:**

[ ] **Box fan** (20-inch is common)
[ ] **HVAC air filter** (MERV 11-13 preferred, same size as the fan—usually 20"x20")
[ ] **Duct tape, bungee cords, or velcro straps**
[ ] **Cardboard or foam board** for stability and air direction (Optional) 

---

### Instructions:

#### 1. **Choose a good filter**
- Look for a **MERV 11-13 ↗** rated filter. Higher MERV = better filtration, but don't go above MERV 13 for this kind of fan (it strains the motor).
- Make sure the dimensions match your fan (e.g., 20"x20").

#### 2. **Attach the filter to the intake side of the fan**
- The **intake side** is the back of the fan, where air gets pulled in.
- Align the filter so that the arrows on the side of the filter point toward the fan.
- Use **duct tape, velcro straps**, or **bungee cords** to secure it firmly. Make sure air can't sneak around the edges.

#### 3. (Optional) **Build a shroud or frame**
- To improve airflow, you can tape a **cardboard shroud** to the front (output) side of the fan with a smaller opening (~14" diameter circle). This reduces turbulence and boosts efficiency.
- You can also build a **cube frame** using four filters and tape the fan on top for a 360-degree filter box (called a **Corsi-Rosenthal Box ↗**).

#### 4. **Plug in and test**
- Turn on the fan at a medium or low speed. You should feel air blowing through the front and none escaping from the sides of the filter.
- Replace the filter every 1-3 months, or sooner if you're filtering a smoky or dusty space.

---

### **Additional Tips**:
- Place it in a **central room** or **near a smoke/dust source**.
- Add a **pre-filter layer ↗** (like a piece of an old T-shirt or window screen) to trap big particles and extend the life of your main filter.`
      },
      'Pesticide Replacements': {
        query: `How can I keep pests away from my crops given I don't have pesticides?`,
        response: `If you're trying to protect your crops without using chemical pesticides, you've got quite a few effective and natural options. Here's a rundown of strategies you can try, depending on what kind of pests you're dealing with and what you're growing:

---

### **Cultural Methods**
- **Crop rotation ↗** - Prevents pests from building up in the soil.
- **Intercropping ↗** - Mixing crops can confuse pests and reduce their impact.
- **Timing** - Planting earlier or later than usual can help avoid peak pest seasons.
- **Sanitation** - Remove plant debris and weeds that can harbor pests.

---

### **Biological Control**
- **Beneficial insects ↗** - Ladybugs, lacewings, parasitic wasps, and nematodes can help manage aphids, caterpillars, and other pests.
- **Encourage birds and frogs** - Create a friendly environment with water and shelter to attract natural predators.

---

### **Companion Planting**
Some plants repel specific pests. For example:
- **Marigolds ↗** - repel nematodes and aphids.
- **Basil ↗** - deters mosquitoes and tomato hornworms.
- **Garlic and chives ↗** - good against aphids and beetles.
- **Nasturtiums ↗** - act as a "trap crop" for aphids.

---

### **Physical Barriers**
- **Row covers ↗** - Lightweight fabrics that keep flying insects out.
- **Netting or mesh** - Keeps birds and larger insects off plants.
- **Collars ↗** - Protect stems of seedlings from cutworms.
- **Sticky traps** - Attract and catch flying pests like whiteflies and gnats.

---

### **Natural Sprays (DIY or store-bought organic)**
- **Neem oil ↗** - Works against a variety of soft-bodied insects.
- **Garlic/chili spray ↗** - Natural deterrent to many pests.
- **Soap spray ↗** - Mild dish soap mixed with water can suffocate aphids, spider mites, etc.
- **Diatomaceous earth ↗** - Dusting this around plants can kill soft-bodied bugs.

---

### **Regular Monitoring**
- Walk your fields or garden daily or every few days.
- Remove pests by hand if feasible.
- Prune damaged leaves or infected areas early to stop spread.`
      }
    };

    function submitEmail() {
      const email = document.getElementById('emailInput').value;
      if (!email) {
        alert('Please enter an email address');
        return;
      }
      if (!isValidEmail(email)) {
        alert('Please enter a valid email address');
        return;
      }
      const formData = new FormData();
      formData.append('email', email);
      fetch('https://api.arkcomputers.xyz/landing-page-signup', {
        method: 'POST',
        body: formData,
        mode: 'no-cors'
      })
        .then(() => {
          alert('Thank you for signing up!');
          document.getElementById('emailInput').value = '';
        })
        .catch(() => {
          alert('Thank you for signing up!');
          document.getElementById('emailInput').value = '';
        });
    }

    function isValidEmail(email) {
      return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);
    }

    let currentAnimation = null;

    async function loadAndTypeContent() {
      try {
        if (currentAnimation) {
          clearTimeout(currentAnimation);
          currentAnimation = null;
        }
        const terminal = document.querySelector('.terminal-content');
        terminal.innerHTML = '';
        const currentExample = window.currentExample || 'Semiconductor Manufacturing';
        const example = TERMINAL_EXAMPLES[currentExample];

        // Configure marked options
        marked.setOptions({
          breaks: false,        // Don't add <br> on single line breaks
          gfm: true,           // Use GitHub Flavored Markdown
          headerIds: false,     // Don't add IDs to headers
          mangle: false,        // Don't escape HTML
          smartLists: true,     // Use smarter list behavior
          xhtml: false         // Don't use self-closing tags
        });

        let formattedQuery = `<div class="query">> ${example.query}</div>\n\n`;
        terminal.innerHTML = formattedQuery
        const words = example.response.match(/\S+|\s+/g) || [];
        let index = 0;
        function typeWord() {
          if (index < words.length) {
            const partialContent = words.slice(0, index + 1).join('');
            terminal.innerHTML = formattedQuery + marked.parse(partialContent + '<span class="cursor"></span>');
            terminal.scrollTop = terminal.scrollHeight;
            index++;
            currentAnimation = setTimeout(typeWord, 20);
          } else {
            terminal.innerHTML = formattedQuery + marked.parse(example.response);
          }
        }
        typeWord();
      } catch (error) {
        console.error('Error loading terminal content:', error);
        document.querySelector('.terminal-content').innerHTML = marked.parse('Error loading content. Please try again later.');
      }
    }

    function switchTab(example) {
      // Cancel any ongoing animation before switching tabs
      if (currentAnimation) {
        clearTimeout(currentAnimation);
        currentAnimation = null;
      }
      document.querySelectorAll('.tab-button').forEach(button => {
        button.classList.remove('active');
        if (button.textContent.includes(example.split(' ')[0])) {
          button.classList.add('active');
        }
      });
      window.currentExample = example;
      loadAndTypeContent();
      
      // Add event tracking for tab switches
      sendEvent('tab_switch', { tab: example });
    }

    const observer = new IntersectionObserver(entries => {
      entries.forEach(entry => {
        if (entry.isIntersecting) {
          loadAndTypeContent();
          observer.disconnect();
        }
      });
    });

    observer.observe(document.querySelector('.terminal'));

    // Function to get query parameters
    function getQueryParams() {
      const params = new URLSearchParams(window.location.search);
      return {
        status: params.get('status')
      };
    }

    // Function to show popup
    function showPopup(message) {
      alert(message);
    }

    // Check the status and show the appropriate popup
    window.onload = function() {
      const { status } = getQueryParams();
      if (status === 'success') {
        showPopup('Payment successful! Thank you for your deposit.');
      } else if (status === 'cancel') {
        showPopup('Payment was canceled. Please try again.');
      }
    };
    
    async function handleDeposit() {
      try {
        const response = await fetch('https://api.arkcomputers.xyz/create-checkout-session', {
          method: 'POST',
          headers: {
            'Content-Type': 'application/json'
          }
        });
        
        if (!response.ok) {
          throw new Error('Network response was not ok');
        }
        
        const data = await response.json();
        if (!data.id) {
          throw new Error('No session ID received');
        }
        
        const stripe = Stripe('pk_test_51RCRVBHKvBSeiZIzYn0QmElIyCsuYuV5UvlwHSKF3Y1DL7wGspsLockIuLsHePI7SnMhJ5w2lSGuXuWYvlT1aGik00AsOpifJi');
        const { error } = await stripe.redirectToCheckout({
          sessionId: data.id
        });
        
        if (error) {
          console.error('Error:', error);
          alert('An error occurred. Please try again.');
        }
      } catch (error) {
        console.error('Error:', error);
        alert('An error occurred. Please try again.');
      }
    }
  </script>
</body>

</html>