(function() {
  'use strict';
  
  const isMobile = window.innerWidth <= 767;
  const prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  
  if (prefersReducedMotion) return;
  
  document.addEventListener('DOMContentLoaded', () => {
    const targets = gsap.utils.toArray('[data-manifesto-paragraph]');
    if (!targets.length) return;

    const splits = [];
    const triggers = [];

    const destroy = () => {
      while (triggers.length) triggers.pop().kill();
      while (splits.length) splits.pop().revert();
    };

    const build = () => {
      destroy();

      targets.forEach(target => {
        const split = new SplitText(target, {
          type: 'lines',
          linesClass: 'manifesto-line'
        });
        splits.push(split);

        const blurAmount = isMobile ? 8 : 16;
        const yOffset = isMobile ? 11 : 22;
        const duration = isMobile ? 0.4 : 0.6;

        split.lines.forEach((line, idx) => {
          line.dataset.manifestoLine = idx + 1;
          gsap.set(line, { 
            filter: `blur(${blurAmount}px)`, 
            opacity: 0.15, 
            y: yOffset 
          });

          const trigger = ScrollTrigger.create({
            trigger: line,
            start: 'top 80%',
            end: 'bottom 60%',
            ...(isMobile && { 
              markers: false,
              fastScrollEnd: true 
            }),
            onEnter: () =>
              gsap.to(line, {
                filter: 'blur(0px)',
                opacity: 1,
                y: 0,
                duration: duration,
                ease: 'power2.out'
              }),
            onLeaveBack: () =>
              gsap.to(line, {
                filter: `blur(${blurAmount}px)`,
                opacity: 0.15,
                y: yOffset,
                duration: 0.4,
                ease: 'power2.in'
              })
          });

          triggers.push(trigger);
        });
      });

      if ('requestIdleCallback' in window) {
        requestIdleCallback(() => ScrollTrigger.refresh(), { timeout: 100 });
      } else {
        setTimeout(() => ScrollTrigger.refresh(), 0);
      }
    };

    build();

    if (document.fonts?.ready) {
      document.fonts.ready.then(() => {
        if (splits.length === 0) build();
        else ScrollTrigger.refresh();
      }).catch(() => {});
    }

    const debounced = gsap.utils.debounce(build, 150);
    window.addEventListener('resize', debounced);

    if (window.lenis) {
      window.lenis.on('scroll', ScrollTrigger.update);
      ScrollTrigger.addEventListener('refresh', () => {
        if (window.lenis?.update) {
          requestAnimationFrame(() => window.lenis.update());
        }
      });
    }
  });
})();