:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --border: #d2d2d7;
  --accent: #0071e3;
  --max: 40rem;
  --pad: 1.5rem;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    Helvetica,
    Arial,
    sans-serif;
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.022em;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.site-header,
.site-footer,
.site-main {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 600;
  letter-spacing: -0.03em;
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
  opacity: 0.8;
}

.brand img {
  width: 28px;
  height: 28px;
  display: block;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.94rem;
}

.nav a {
  color: var(--muted);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--text);
}

.site-main {
  flex: 1;
  padding-block: 3rem 4rem;
}

h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.lead,
.site-main p {
  margin: 0 0 1rem;
  color: var(--muted);
  max-width: 34rem;
}

.site-main p:last-child {
  margin-bottom: 0;
}

.site-footer {
  padding-block: 1.5rem 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.88rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-bottom: 0.75rem;
}

.site-footer a {
  color: var(--muted);
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--text);
}

@media (max-width: 520px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }
}