:root {
  /* Core colours — change the site palette here. */
  --colour-background: #171a1d;
  --colour-surface: #1d2124;
  --colour-text: #e8eceb;
  --colour-text-muted: #a8b0ae;
  --colour-accent: #73afa7;
  --colour-border: #2b3033;

  /* Layout and spacing — change the overall rhythm here. */
  --content-width: 68rem;
  --reading-width: 46rem;
  --space-page: clamp(1.25rem, 4vw, 3.5rem);
  --space-section: clamp(4.5rem, 10vw, 8rem);
  --radius: 1rem;
}

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

html {
  color-scheme: dark;
  background: var(--colour-background);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 20rem;
  background:
    radial-gradient(circle at 78% 8%, rgb(115 175 167 / 8%), transparent 28rem),
    var(--colour-background);
  color: var(--colour-text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-color: rgb(115 175 167 / 55%);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.3em;
}

a:hover {
  color: var(--colour-accent);
  text-decoration-color: currentColor;
}

a:focus-visible {
  border-radius: 0.2rem;
  outline: 0.18rem solid var(--colour-accent);
  outline-offset: 0.3rem;
}

.site-shell {
  width: min(100%, calc(var(--content-width) + (2 * var(--space-page))));
  min-height: 100vh;
  margin-inline: auto;
  padding-inline: var(--space-page);
}

.site-header,
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.site-header {
  min-height: 6rem;
  border-bottom: 1px solid var(--colour-border);
}

.site-header nav,
.site-footer {
  color: var(--colour-text-muted);
  font-size: 0.9375rem;
}

.brand {
  color: var(--colour-text);
  font-size: 1rem;
  font-weight: 650;
  letter-spacing: 0.015em;
  text-decoration: none;
}

.intro {
  max-width: 52rem;
  padding-block: clamp(6rem, 16vw, 11rem) var(--space-section);
}

.eyebrow,
.status,
.effective-date {
  color: var(--colour-accent);
  font-size: 0.8125rem;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 1.25rem;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.1;
  text-wrap: balance;
}

h1 {
  max-width: 14ch;
  margin-bottom: 2rem;
  font-size: clamp(3rem, 9vw, 6.75rem);
  font-weight: 560;
  letter-spacing: -0.055em;
}

.lede {
  max-width: 38rem;
  margin-bottom: 0;
  color: var(--colour-text-muted);
  font-size: clamp(1.125rem, 2vw, 1.35rem);
  line-height: 1.65;
}

.apps {
  padding-block: var(--space-section);
  border-top: 1px solid var(--colour-border);
}

.section-heading {
  margin-bottom: 2.5rem;
}

.section-heading h2 {
  margin-bottom: 0;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 580;
  letter-spacing: -0.035em;
}

.app-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(15rem, 0.85fr) minmax(18rem, 1fr);
  gap: clamp(2rem, 6vw, 6rem);
  padding: clamp(1.75rem, 4vw, 3rem);
  overflow: hidden;
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgb(115 175 167 / 7%), transparent 45%), var(--colour-surface);
}

.app-card::before {
  position: absolute;
  inset-block: 0;
  left: 0;
  width: 0.2rem;
  background: var(--colour-accent);
  content: "";
}

.app-card h3 {
  margin-bottom: 0.9rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 590;
  letter-spacing: -0.025em;
}

.app-card p {
  margin-bottom: 0;
  color: var(--colour-text-muted);
}

.app-card .status {
  color: var(--colour-accent);
  font-size: 0.75rem;
}

.social {
  padding-block: var(--space-section);
  border-top: 1px solid var(--colour-border);
}

.social-layout {
  display: grid;
  grid-template-columns: minmax(14rem, 0.75fr) minmax(20rem, 1.25fr);
  gap: clamp(2.5rem, 8vw, 7rem);
}

.social-intro p:last-child {
  max-width: 28rem;
  margin-bottom: 0;
  color: var(--colour-text-muted);
  font-size: 1.0625rem;
}

.social-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.social-link {
  display: flex;
  min-height: 3.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--colour-border);
  border-radius: 0.65rem;
  background: var(--colour-surface);
  color: var(--colour-text-muted);
  font-weight: 560;
  text-decoration: none;
}

.social-link:hover {
  border-color: rgb(115 175 167 / 55%);
  color: var(--colour-text);
}

.social-link--primary {
  grid-column: 1 / -1;
  min-height: 4.25rem;
  border-color: rgb(115 175 167 / 45%);
  background: linear-gradient(135deg, rgb(115 175 167 / 10%), transparent 55%), var(--colour-surface);
  color: var(--colour-text);
}

.social-link small {
  color: var(--colour-accent);
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.site-footer {
  min-height: 7rem;
  justify-content: flex-start;
  border-top: 1px solid var(--colour-border);
}

.policy {
  width: min(100%, var(--reading-width));
  margin-inline: auto;
  padding-block: clamp(5rem, 12vw, 8rem) var(--space-section);
}

.policy-header {
  margin-bottom: clamp(4rem, 9vw, 6rem);
  padding-bottom: clamp(2.5rem, 6vw, 4rem);
  border-bottom: 1px solid var(--colour-border);
}

.policy h1 {
  max-width: none;
  margin-bottom: 1.75rem;
  font-size: clamp(2.75rem, 8vw, 5.25rem);
}

.effective-date {
  margin-bottom: 0;
  color: var(--colour-text-muted);
  letter-spacing: 0.06em;
}

.effective-date strong {
  color: var(--colour-text);
  font-weight: 650;
}

.policy-content {
  color: var(--colour-text-muted);
  font-size: 1.0625rem;
}

.policy-content section + section {
  margin-top: 3.5rem;
}

.policy-content h2 {
  margin-bottom: 1rem;
  color: var(--colour-text);
  font-size: 1.35rem;
  font-weight: 620;
  letter-spacing: -0.015em;
}

.policy-content h3 {
  margin-block: 2.25rem 0.75rem;
  color: var(--colour-text);
  font-size: 1.0625rem;
  font-weight: 620;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

.app-policy {
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgb(115 175 167 / 6%), transparent 38%), var(--colour-surface);
}

.policy-content p,
.policy-content li {
  max-width: 68ch;
}

.policy-content p:last-child {
  margin-bottom: 0;
}

.policy-content ul {
  margin-block: 1.25rem 1.5rem;
  padding-left: 1.35rem;
}

.policy-content li {
  padding-left: 0.4rem;
}

.policy-content li + li {
  margin-top: 0.45rem;
}

.policy-content li::marker {
  color: var(--colour-accent);
}

.contact-placeholder {
  display: inline-block;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--colour-border);
  border-radius: 0.5rem;
  background: var(--colour-surface);
  color: var(--colour-accent);
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.9375rem;
}

@media (max-width: 42rem) {
  .site-header {
    min-height: 5rem;
  }

  .intro {
    padding-top: 5rem;
  }

  .app-card {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .social-layout,
  .social-links {
    grid-template-columns: 1fr;
  }

  .social-layout {
    gap: 2rem;
  }

  .social-link--primary {
    grid-column: auto;
  }

  .policy-content {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}