/*
  Features 19 — 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-50: #f8fafc;
  --slate-600: #475569;
  --slate-900: #0f172a;
  --blue-600: #2563eb;
  --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(--slate-900);
  background-color: var(--slate-50);
  line-height: 1.5;
}

.features {
  padding: clamp(4rem, 3.5rem + 2vw, 6rem) clamp(1rem, 0.3rem + 3vw, 2rem);
}

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

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

.kicker {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--blue-600);
}

.heading {
  margin: 0.75rem 0 0;
  font-weight: 600;
  font-size: clamp(1.875rem, 1.5rem + 1.9vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.cards {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.card {
  border-radius: 1rem;
  background-color: var(--white);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
  padding: 1.5rem;
}

.bar {
  height: 4rem;
  border-radius: 0.5rem;
  background-color: var(--blue-600);
  background-image: linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, 0.55) 50%, transparent 70%);
  background-size: 200% 100%;
}

.card__title {
  margin: 1rem 0 0;
  font-size: 1rem;
  font-weight: 600;
}

.card__text {
  margin: 0.375rem 0 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--slate-600);
}

@media (min-width: 640px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Motion — the shimmer is a continuous loop, fully gated under reduced
   motion (the bar simply holds still); the card entrance is a separate,
   also-gated one-shot reveal. */
@media (prefers-reduced-motion: no-preference) {
  @keyframes al-features19-shimmer {
    from {
      background-position: -150% 0;
    }
    to {
      background-position: 250% 0;
    }
  }

  @keyframes al-features19-card {
    from {
      opacity: 0;
      transform: translateY(14px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .bar {
    animation: al-features19-shimmer 2200ms ease-in-out infinite;
  }

  .card {
    animation: al-features19-card 550ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }
}
Features 19

Requirements

Dependencies

Usage
