/*
  How It Works 13 — standalone HTML/CSS/JS implementation.
  No build step, no framework, no external dependency: copy these three
  files into any project and open index.html as-is.
*/

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

:root {
  --white: #ffffff;
  --slate-950: #020617;
  --slate-900: #0f172a;
  --slate-400: #94a3b8;
  --blue-600: #2563eb;
  --violet-600: #7c3aed;
  --emerald-600: #059669;
  --amber-500: #f59e0b;
  --font-sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji";
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--white);
  background-color: var(--slate-950);
  line-height: 1.5;
}

.hiw {
  padding: clamp(3rem, 2.5rem + 2vw, 5rem) clamp(1rem, 0.3rem + 3vw, 2rem);
}

.hiw__inner {
  width: 100%;
  max-width: 64rem;
  margin: 0 auto;
}

.hiw__intro {
  max-width: 34rem;
  margin: 0 auto;
  text-align: center;
}

.hiw__heading {
  margin: 0;
  font-weight: 600;
  font-size: clamp(1.875rem, 1.5rem + 1.9vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--white);
}

.hiw__lede {
  margin: 0.75rem 0 0;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--slate-400);
}

.grid {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.tile {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 10rem;
  padding: 1.5rem;
  border-radius: 1rem;
}

.tile--large {
  background-color: var(--slate-900);
}

.tile--blue {
  background-color: var(--blue-600);
}

.tile--violet {
  background-color: var(--violet-600);
}

.tile--emerald {
  background-color: var(--emerald-600);
}

.tile--amber {
  background-color: var(--amber-500);
}

.tile__number {
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
}

.tile__number--large {
  color: var(--slate-400);
}

.tile__title {
  margin: 0.375rem 0 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

.tile__title--large {
  font-size: 1.5rem;
}

.tile__text {
  margin: 0.375rem 0 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.8);
}

.tile__text--large {
  color: var(--slate-400);
}

@media (min-width: 640px) {
  .grid {
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 10rem;
    gap: 1.25rem;
  }

  .tile {
    min-height: 0;
  }

  .tile--large {
    grid-column: span 2;
    grid-row: span 2;
    padding: 2rem;
  }
}

/* Motion — disabled entirely under reduced motion; every tile already
   renders at its final, fully visible, untransformed state outside this
   media query. */
@media (prefers-reduced-motion: no-preference) {
  @keyframes al-howitworks13-flip {
    from {
      opacity: 0;
      transform: perspective(1200px) rotateX(35deg) translateY(24px);
    }
    to {
      opacity: 1;
      transform: perspective(1200px) rotateX(0deg) translateY(0);
    }
  }

  .flip {
    transform-origin: bottom;
    animation: al-howitworks13-flip 700ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }
}
How It Works 13

Requirements

Dependencies

Usage
