(() => {
  const toggleButton = document.getElementById("theme-toggle");
  const html = document.documentElement;

  const sessionTheme = sessionStorage.getItem("theme");
  const systemPrefersDark = window.matchMedia(
    "(prefers-color-scheme: dark)",
  ).matches;

  const initialTheme = sessionTheme || (systemPrefersDark ? "dark" : "light");

  if (initialTheme === "dark") {
    html.setAttribute("data-theme", "dark");
    toggleButton.checked = true;
  }

  toggleButton.addEventListener("change", () => {
    const theme = html.getAttribute("data-theme");

    if (theme === "dark") {
      html.removeAttribute("data-theme");
      sessionStorage.setItem("theme", "light");
      toggleButton.checked = false;
    } else {
      html.setAttribute("data-theme", "dark");
      sessionStorage.setItem("theme", "dark");
      toggleButton.checked = true;
    }
  });
})();

(() => {
  const colors = [
    "#ff69b4",
    "#b19cd9",
    "#8b6f47",
    "#ff85c0",
    "#c4b5fd",
    "#d4a574",
  ];
  const shapes = ["❀", "✿", "✽", "✾", "✻", "❊", "❋", "✼"];

  document.addEventListener("mousemove", (e) => {
    createParticle(e.clientX, e.clientY);
  });

  const createParticle = (x, y) => {
    const particle = document.createElement("div");
    particle.className = "fairy-dust";

    const shape = shapes[Math.floor(Math.random() * shapes.length)];
    const size = Math.random() * 8 + 6;
    const color = colors[Math.floor(Math.random() * colors.length)];
    const offsetX = (Math.random() - 0.5) * 20;
    const offsetY = (Math.random() - 0.5) * 20;
    const rotation = Math.random() * 360;

    particle.textContent = shape;
    particle.style.cssText = `
      position: fixed;
      left: ${x + offsetX}px;
      top: ${y + offsetY}px;
      font-size: ${size}px;
      color: ${color};
      opacity: 0.4;
      pointer-events: none;
      z-index: 9001; /* it's over 9000 */
      line-height: 1;
      transform: rotate(${rotation}deg);
      animation: fairy-float 0.8s ease-out forwards;
    `;

    document.body.appendChild(particle);
    setTimeout(() => particle.remove(), 800);
  };
})();