:root,
html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f1419;
  --text: #e8eef7;
  --muted: #8b9bb4;
  --accent: #3d8bfd;
  --glow-1: #1e3a5f;
  --glow-2: #1a2f45;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(1000px 500px at 15% -5%, var(--glow-1) 0%, transparent 55%),
    radial-gradient(800px 400px at 90% 10%, var(--glow-2) 0%, transparent 50%),
    var(--bg);
  color: var(--text);
}

.intro {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.intro-brand {
  text-align: center;
  max-width: 28rem;
}

.intro-eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(61, 139, 253, 0.35);
  background: rgba(61, 139, 253, 0.12);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.intro-brand h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.intro-lead {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

.intro-note {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}