/*
  Features 03 — 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-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-900: #0f172a;
  --blue-50: #eff6ff;
  --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(--slate-900);
  background-color: var(--white);
  line-height: 1.5;
}

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

.features__inner {
  width: 100%;
  max-width: 72rem;
  margin: 0 auto;
}

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

.kicker {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--slate-500);
}

.heading {
  margin: 0.75rem 0 0;
  font-weight: 600;
  font-size: clamp(2.25rem, 1.7rem + 2.8vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
}

.highlight {
  position: relative;
  display: inline-block;
}

.underline {
  position: absolute;
  right: 0;
  bottom: -0.25rem;
  left: 0;
  height: 0.25rem;
  border-radius: 999px;
  background-color: var(--blue-600);
  transform-origin: left;
}

.lede {
  margin: 1.5rem 0 0;
  max-width: 28rem;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--slate-600);
}

.panel {
  margin-top: 2rem;
  border-radius: 1rem;
  border: 1px solid var(--slate-200);
  background-color: var(--slate-50);
  padding: 1.25rem;
}

.panel__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.swatches {
  display: flex;
  gap: 0.375rem;
}

.dot {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 999px;
}

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

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

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

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

.version {
  border-radius: 999px;
  border: 1px solid var(--slate-200);
  background-color: var(--white);
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--slate-500);
}

.type-sample {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-top: 1rem;
}

.type-sample__lg {
  font-size: 1.5rem;
  font-weight: 700;
}

.type-sample__md {
  font-size: 1rem;
  font-weight: 600;
  color: var(--slate-500);
}

.type-sample__sm {
  font-size: 0.875rem;
  color: var(--slate-400);
}

.spacing-sample {
  display: flex;
  align-items: flex-end;
  gap: 0.375rem;
  margin-top: 1rem;
}

.bar {
  border-radius: 0.125rem;
}

.bar--1 {
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--slate-300);
}

.bar--2 {
  width: 0.75rem;
  height: 0.75rem;
  background-color: var(--slate-400);
}

.bar--3 {
  width: 1rem;
  height: 1rem;
  background-color: var(--slate-500);
}

.bar--4 {
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--slate-900);
}

.rows {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--slate-200);
}

.row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--slate-200);
}

.icon-tile {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
  background-color: var(--blue-50);
  color: var(--blue-600);
}

.icon-tile svg {
  width: 1rem;
  height: 1rem;
}

.row__body {
  min-width: 0;
  flex: 1;
}

.row__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
}

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

.badge {
  border-radius: 999px;
  background-color: var(--slate-100);
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--slate-500);
}

.row__text {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--slate-600);
}

@media (min-width: 1024px) {
  .layout {
    grid-template-columns: 5fr 7fr;
    gap: 4rem;
  }
}

/* Motion — disabled entirely under reduced motion; everything already
   renders at its final, fully visible state outside this media query. */
@media (prefers-reduced-motion: no-preference) {
  @keyframes al-features03-underline {
    from {
      transform: scaleX(0);
    }
    to {
      transform: scaleX(1);
    }
  }

  @keyframes al-features03-panel {
    from {
      opacity: 0;
      transform: translateY(14px) scale(0.97);
    }
    to {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }

  @keyframes al-features03-row {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .underline {
    animation: al-features03-underline 650ms 200ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .panel {
    animation: al-features03-panel 600ms 250ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .row {
    animation: al-features03-row 500ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }
}
Features 03

Requirements

Dependencies

Usage
