StatsCounter Social Proof

---
/**
 * StatsCounter
 * Grote statistieken met count-up animatie via IntersectionObserver.
 * Twee layout opties: row (horizontaal) of grid.
 * Dark variant optioneel via prop.
 */
interface Stat {
  value: string;
  suffix?: string;
  label: string;
  description?: string;
  icon?: string;
}

interface Props {
  preHeadline?: string;
  headline?: string;
  sub?: string;
  stats: Stat[];
  layout?: 'row' | 'grid';
  dark?: boolean;
}

const {
  preHeadline,
  headline,
  sub,
  stats = [],
  layout = 'row',
  dark = false,
} = Astro.props;
---

<section
  class:list={['sc', `sc--${layout}`, { 'sc--dark': dark }]}
  data-component="stats-counter"
>
  <div class="sc__inner">
    {(preHeadline || headline || sub) && (
      <div class="sc__header">
        {preHeadline && <p class="sc__pre">{preHeadline}</p>}
        {headline && <h2 class="sc__headline" set:html={headline} />}
        {sub && <p class="sc__sub">{sub}</p>}
      </div>
    )}

    <div class="sc__stats">
      {stats.map((s, i) => (
        <div class="sc__stat" style={`--delay:${i * 0.1}s`}>
          {s.icon && (
            <div class="sc__icon" set:html={s.icon} />
          )}
          <div class="sc__value-wrap">
            <span
              class="sc__value"
              data-target={s.value.replace(/[^0-9.]/g, '')}
              data-suffix={s.suffix ?? s.value.replace(/[0-9.]/g, '')}
            >
              {s.value}{s.suffix}
            </span>
          </div>
          <p class="sc__label">{s.label}</p>
          {s.description && <p class="sc__desc">{s.description}</p>}
        </div>
      ))}
    </div>
  </div>
</section>

<script>
  const sections = document.querySelectorAll('[data-component="stats-counter"]');

  sections.forEach(section => {
    const stats = section.querySelectorAll<HTMLElement>('.sc__value');
    let animated = false;

    function countUp(el: HTMLElement) {
      const raw = el.dataset.target ?? '';
      const suffix = el.dataset.suffix ?? '';
      const isFloat = raw.includes('.');
      const target = parseFloat(raw) || 0;
      const duration = 1800;
      const start = performance.now();

      function update(now: number) {
        const elapsed = now - start;
        const progress = Math.min(elapsed / duration, 1);
        const eased = 1 - Math.pow(1 - progress, 3);
        const current = target * eased;
        el.textContent = (isFloat ? current.toFixed(1) : Math.round(current).toString()) + suffix;
        if (progress < 1) requestAnimationFrame(update);
      }

      requestAnimationFrame(update);
    }

    const observer = new IntersectionObserver(
      entries => {
        if (entries[0].isIntersecting && !animated) {
          animated = true;
          const delay = Number((entries[0].target as HTMLElement).style.getPropertyValue('--delay') ?? 0) * 1000;
          stats.forEach((stat, i) => {
            setTimeout(() => countUp(stat), i * 100);
          });
        }
      },
      { threshold: 0.3 }
    );

    const wrapper = section.querySelector('.sc__stats');
    if (wrapper) observer.observe(wrapper);
  });
</script>

<style>
  .sc {
    padding: 5rem 1.5rem;
    background: var(--color-bg, #fff);
  }

  .sc--dark {
    background: var(--color-primary, #0a0a0a);
  }

  .sc__inner { max-width: 1200px; margin: 0 auto; }

  /* Header */
  .sc__header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 4rem;
  }

  .sc__pre {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent, #6366f1);
    margin-bottom: 0.875rem;
  }

  .sc__headline {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.1;
    color: var(--color-primary, #0a0a0a);
    margin-bottom: 0.875rem;
  }

  .sc--dark .sc__headline { color: #fff; }

  .sc__headline :global(em) {
    font-style: normal;
    color: var(--color-accent, #6366f1);
  }

  .sc__sub {
    font-size: 1rem;
    line-height: 1.65;
    color: var(--color-muted, #6b7280);
  }

  .sc--dark .sc__sub { color: rgba(255,255,255,0.45); }

  /* Stats row */
  .sc--row .sc__stats {
    display: flex;
    gap: 0;
    justify-content: center;
    flex-wrap: wrap;
  }

  .sc--row .sc__stat {
    flex: 1;
    min-width: 160px;
    max-width: 280px;
    text-align: center;
    padding: 2rem 1.5rem;
    border-right: 1px solid rgba(0,0,0,0.07);
  }

  .sc--dark.sc--row .sc__stat {
    border-right-color: rgba(255,255,255,0.07);
  }

  .sc--row .sc__stat:last-child { border-right: none; }

  /* Stats grid */
  .sc--grid .sc__stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
  }

  .sc--grid .sc__stat {
    background: rgba(0,0,0,0.02);
    border-radius: 1rem;
    padding: 2rem;
    border: 1px solid rgba(0,0,0,0.05);
  }

  .sc--dark.sc--grid .sc__stat {
    background: rgba(255,255,255,0.04);
    border-color: rgba(255,255,255,0.07);
  }

  /* Stat */
  .sc__stat {
    animation: sc-fade-up 0.6s var(--delay, 0s) cubic-bezier(0.22,1,0.36,1) both;
  }

  .sc__icon {
    width: 40px;
    height: 40px;
    color: var(--color-accent, #6366f1);
    margin: 0 auto 1rem;
  }

  .sc__value-wrap { overflow: hidden; }

  .sc__value {
    display: block;
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1;
    color: var(--color-primary, #0a0a0a);
    margin-bottom: 0.5rem;
    font-feature-settings: "tnum";
  }

  .sc--dark .sc__value { color: #fff; }

  /* Accent first digit styling option */
  .sc__label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-primary, #0a0a0a);
    margin-bottom: 0.375rem;
  }

  .sc--dark .sc__label { color: rgba(255,255,255,0.85); }

  .sc__desc {
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--color-muted, #6b7280);
  }

  .sc--dark .sc__desc { color: rgba(255,255,255,0.35); }

  @keyframes sc-fade-up {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  @media (prefers-reduced-motion: reduce) {
    .sc__stat { animation: none; }
  }

  @media (max-width: 600px) {
    .sc--row .sc__stats { flex-direction: column; }
    .sc--row .sc__stat { border-right: none; border-bottom: 1px solid rgba(0,0,0,0.07); max-width: none; }
    .sc--row .sc__stat:last-child { border-bottom: none; }
    .sc--dark.sc--row .sc__stat { border-bottom-color: rgba(255,255,255,0.07); }
  }
</style>