:root {
  --accent: #4831B9;
  --accent-dark: #30217D;
  --bg: #F7F6FB;
  --surface: #FFFFFF;
  --text: #1C1A26;
  --text-secondary: #5E5A70;
  --border: #E4E1EE;
  --link: #4831B9;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121019;
    --surface: #1C1926;
    --text: #F2F0F8;
    --text-secondary: #A9A4BC;
    --border: #2E2A3C;
    --link: #A797F2;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); }

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

/* Top bar on the inner pages */
.bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0 24px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  font-size: 19px;
}
.bar img { width: 32px; height: 32px; }

/* Landing */
.hero {
  text-align: center;
  padding: 48px 0 32px;
}
.hero .icon {
  width: 112px;
  height: 112px;
  filter: drop-shadow(0 10px 24px rgba(72, 49, 185, 0.35));
}
.hero h1 {
  margin: 20px 0 4px;
  font-size: 44px;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.hero .subtitle {
  margin: 0;
  font-size: 21px;
  color: var(--text-secondary);
}
.hero .meaning {
  margin: 16px 0 0;
  font-size: 15px;
  color: var(--text-secondary);
}

.badge {
  display: inline-block;
  margin-top: 28px;
  padding: 12px 22px;
  border-radius: 999px;
  background: linear-gradient(var(--accent), var(--accent-dark));
  color: #FFFFFF;
  font-weight: 600;
  text-decoration: none;
}

.steps {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.steps li {
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}
.steps strong { display: block; font-size: 18px; margin-bottom: 2px; }
.steps span { color: var(--text-secondary); }

@media (min-width: 640px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
}

/* Inner pages */
.doc h1 { font-size: 32px; line-height: 1.2; margin: 0 0 4px; letter-spacing: -0.01em; }
.doc .updated { margin: 0 0 28px; color: var(--text-secondary); font-size: 15px; }
.doc h2 { font-size: 20px; margin: 32px 0 8px; }
.doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }

.center { text-align: center; padding-top: 48px; }
.center .icon { width: 88px; height: 88px; }
.center h1 { font-size: 28px; margin: 20px 0 8px; }
.center p { color: var(--text-secondary); margin: 0 auto; max-width: 420px; }

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 15px;
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
footer a { color: var(--text-secondary); }