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      <h1>Daniel Castillo Castro</h1>
      <p class="hero-title">PhD in Physics · Computational Nanomaterials Researcher</p>
      <p class="hero-bio">
        I work on multiscale modeling of 2D materials at the intersection of
        computational simulation, machine-learning interatomic potentials, and
        quantum computing applied to molecular chemistry. Member of the Moleqlas
        group (QuDIT, PUC Chile).
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          <h3 class="project-title">
            <a href="https://github.com/Dacastillo/r" target="_blank" rel="noopener noreferrer">r</a>
          </h3>
          <span class="project-year">2024–2026</span>
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          Computational research in DFT, LAMMPS and molecular dynamics of 2D materials and heterostructures.
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          <code>Python</code>
          <code>LAMMPS</code>
          <code>DFT</code>
        </div>
      </article>

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        <div class="project-header">
          <h3 class="project-title">
            <a href="https://github.com/Dacastillo/Moleqlas---group-repo" target="_blank" rel="noopener noreferrer">Moleqlas</a>
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          <span class="project-year">2024–2026</span>
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          Quantum computing applied to molecular chemistry. Quantum simulations for molecular systems (QuDIT, PUC Chile).
        </p>
        <div class="project-stack">
          <code>Qiskit</code>
          <code>Python</code>
          <code>VQE</code>
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          <h3 class="project-title">
            <a href="https://github.com/Dacastillo/QQuipu3" target="_blank" rel="noopener noreferrer">QQuipu3</a>
          </h3>
          <span class="project-year">2024</span>
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        <p class="project-description">
          Simulation of thermal/Gibbs states with quantum circuits. Preparation of state ρ<sub>β</sub> = e<sup>−βH</sup>/Z.
        </p>
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          <code>Qiskit</code>
          <code>Python</code>
        </div>
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          <h3 class="project-title">
            <a href="https://github.com/Dacastillo/Shore-Test" target="_blank" rel="noopener noreferrer">Shore-Test</a>
          </h3>
          <span class="project-year">2023</span>
        </div>
        <p class="project-description">
          CoastSat applied to Chilean coastlines: Landsat/Sentinel-2 + Google Earth Engine for shoreline tracking.
        </p>
        <div class="project-stack">
          <code>Python</code>
          <code>GEE</code>
          <code>Sentinel-2</code>
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          <h3 class="project-title">
            <a href="https://github.com/Dacastillo/PDE-Test" target="_blank" rel="noopener noreferrer">PDE-Test</a>
          </h3>
          <span class="project-year">2023</span>
        </div>
        <p class="project-description">
          Solving PDEs with finite elements on 3D geometries defined by STL files.
        </p>
        <div class="project-stack">
          <code>Python</code>
          <code>FEM</code>
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          <h3 class="project-title">
            <a href="https://github.com/Dacastillo/LAMMPS-tutorial" target="_blank" rel="noopener noreferrer">LAMMPS Tutorial</a>
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          <span class="project-year">2025</span>
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          LAMMPS tutorial presented at LAMMPS Workshop. Practical guide for molecular dynamics simulation.
        </p>
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          <code>LAMMPS</code>
          <code>Shell</code>
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        <h3 class="project-title">Computational Simulation</h3>
        <p class="project-description">
          Molecular dynamics with LAMMPS, DFT with GPAW/Quantum ESPRESSO/ORCA, multiscale modeling of 2D materials.
        </p>
        <div class="project-stack">
          <code>LAMMPS</code>
          <code>GPAW</code>
          <code>QE</code>
          <code>ORCA</code>
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      <article class="project-card">
        <h3 class="project-title">Machine Learning</h3>
        <p class="project-description">
          Machine-learning interatomic potentials (MLIP, Behler-Parrinello), active learning, AMP.
        </p>
        <div class="project-stack">
          <code>PyTorch</code>
          <code>AMP</code>
          <code>scikit-learn</code>
        </div>
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      <article class="project-card">
        <h3 class="project-title">Quantum Computing</h3>
        <p class="project-description">
          VQE, compact ansätze, Gibbs states, quantum chemistry in Qiskit.
        </p>
        <div class="project-stack">
          <code>Qiskit</code>
          <code>VQE</code>
          <code>Python</code>
        </div>
      </article>

      <article class="project-card">
        <h3 class="project-title">Bibliometric Analysis</h3>
        <p class="project-description">
          R-based system for scientific literature analysis with OpenAlex, Semantic Scholar, CrossRef.
        </p>
        <div class="project-stack">
          <code>R</code>
          <code>openalexR</code>
          <code>bibliometrix</code>
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