:root {
  color-scheme: light dark;
  --bg: #f4f6f8;
  --surface: #ffffff;
  --text: #101828;
  --muted: #667085;
  --line: #e7eaee;
  --accent: #0e7c6f;
  --accent-soft: #e4f3f0;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 12px 28px -16px rgba(16, 24, 40, 0.18);
  --radius: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1416;
    --surface: #121d20;
    --text: #e7eef0;
    --muted: #8ba0a5;
    --line: #1f2d31;
    --accent: #6fd3c8;
    --accent-soft: #14302d;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 12px 28px -16px rgba(0, 0, 0, 0.6);
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 20px 72px;
}

/* Header */

.site {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-bottom: 40px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  display: block;
}

.site nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-left: auto;
}

.site nav a {
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--muted);
}

.site nav a:hover {
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
}

.site nav a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

/* Hero (home) */

.hero {
  text-align: center;
  padding: 24px 0 36px;
}

.hero .app-icon {
  width: 88px;
  height: 88px;
  border-radius: 22px;
  box-shadow: var(--shadow);
  display: block;
  margin: 0 auto 20px;
}

h1 {
  font-size: clamp(27px, 5vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

.hero .lede {
  margin: 0 auto;
  max-width: 34ch;
  color: var(--muted);
  font-size: 17px;
}

/* Cards (home) */

.cards {
  display: grid;
  gap: 10px;
  margin: 0 0 28px;
}

.card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  text-decoration: none;
}

.tile {
  flex: none;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
}

.tile svg {
  width: 21px;
  height: 21px;
}

.card-copy {
  display: grid;
  gap: 1px;
  min-width: 0;
}

.card-title {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card-sub {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.chev {
  flex: none;
  margin-left: auto;
  width: 18px;
  height: 18px;
  color: var(--muted);
}

/* Article pages */

.meta {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 28px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px 24px 24px;
}

.panel .intro {
  margin-top: 14px;
}

.panel h2 {
  font-size: 18px;
  letter-spacing: -0.01em;
  margin: 28px 0 8px;
}

.panel p {
  margin: 0 0 12px;
}

.panel ul,
.panel ol {
  margin: 0 0 12px;
  padding-left: 22px;
}

.panel li {
  margin: 6px 0;
}

.panel li::marker {
  color: var(--accent);
}

.note {
  display: flex;
  gap: 10px;
  margin: 20px 0 4px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  color: var(--muted);
  font-size: 14.5px;
}

.note svg {
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  color: var(--accent);
}

.note p {
  margin: 0;
}

/* Footer */

.foot {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
}

@media (max-width: 520px) {
  .site {
    margin-bottom: 28px;
  }

  .site nav {
    margin-left: 0;
    width: 100%;
    margin-left: -12px;
  }

  .panel {
    padding: 4px 18px 20px;
  }
}