*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
}

:root {
  --color-text: #1a1a1a;
  --color-text-muted: #555;
  --color-bg: #fafaf8;
  --color-surface: #fff;
  --color-border: #d4d0c8;
  --color-accent: #2d5a27;
  --color-accent-light: #e8f0e6;
  --font-display: "DM Serif Display", Georgia, serif;
  --font-body: "DM Sans", system-ui, sans-serif;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* -- Page header -- */

.SiteHeader {
  padding-block: 1.25rem;
  padding-inline: 2rem;
  border-block-end: 0.0625rem solid var(--color-border);
  background-color: var(--color-surface);
}

.SiteHeader-inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-inline-size: 72rem;
  margin-inline: auto;
}

.SiteHeader-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-accent);
  text-decoration: none;
}

.SiteHeader-logo svg {
  inline-size: 1.5rem;
  block-size: 1.5rem;
}

.SiteHeader-tagline {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* -- Hero -- */

.Hero {
  padding-block: 4rem 3rem;
  padding-inline: 2rem;
  text-align: center;
}

.Hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.2;
  max-inline-size: 36rem;
  margin-inline: auto;
}

.Hero-subtitle {
  margin-block-start: 1rem;
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-inline-size: 40rem;
  margin-inline: auto;
}

/* -- Features grid (the star of the show) -- */

.Features {
  padding-block: 2rem 5rem;
  padding-inline: 2rem;
  max-inline-size: 72rem;
  margin-inline: auto;
}

.Features-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  row-gap: 4rem;
}

.FeatureCard {
  display: grid;
  grid-row: span 3;
  grid-template-rows: subgrid;
  row-gap: 0;
}

.FeatureCard-icon {
  inline-size: 2.5rem;
  block-size: 2.5rem;
  color: var(--color-accent);
  margin-block-end: 1rem;
}

.FeatureCard-title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 400;
  line-height: 1.3;
  border-block-end: 0.0625rem solid var(--color-border);
  padding-block-end: 1rem;
  margin-block-end: 1rem;
}

.FeatureCard-description {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* -- Annotation banner -- */

.Annotation {
  padding-block: 2.5rem;
  padding-inline: 2rem;
  background-color: var(--color-accent-light);
  border-block-start: 0.0625rem solid var(--color-border);
}

.Annotation-inner {
  max-inline-size: 72rem;
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: baseline;
}

.Annotation-heading {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
}

.Annotation-text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-inline-size: 52rem;
}

.Annotation-text code {
  font-size: 0.875rem;
  background-color: var(--color-surface);
  padding-inline: 0.375rem;
  padding-block: 0.125rem;
  border-radius: 0.1875rem;
  border: 0.0625rem solid var(--color-border);
}

/* -- Footer -- */

.SiteFooter {
  padding-block: 2rem;
  padding-inline: 2rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  border-block-start: 0.0625rem solid var(--color-border);
}

.SiteFooter a {
  color: var(--color-accent);
}

/* Visually hidden but accessible to assistive technology */
.sr-only {
  position: absolute;
  inline-size: 0.0625rem;
  block-size: 0.0625rem;
  padding: 0;
  margin: -0.0625rem;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}