:root {
  color-scheme: dark;
  --bg: #0c1016;
  --card: #151b24;
  --text: #eef2f7;
  --muted: #a8b3c0;
  --accent: #4d8fd9;
  --accent-hover: #6aa3e3;
  --border: #2a3442;
  --shadow: 0 16px 48px rgba(0, 0, 0, 0.45);
  --radius: 16px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell,
    "Noto Sans", sans-serif;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, #1a2a40 0%, transparent 55%),
    var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.25rem;
  line-height: 1.55;
}

.card {
  width: min(100%, 32rem);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.5rem 2rem;
  text-align: center;
}

.logo {
  display: block;
  width: min(100%, 14rem);
  height: auto;
  margin: 0 auto 1.5rem;
}

.lede {
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.actions {
  margin: 0;
}

.button {
  display: inline-block;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.15s ease;
}

.button:hover,
.button:focus-visible {
  background: var(--accent-hover);
}

.button:focus-visible {
  outline: 3px solid #7eb0e8;
  outline-offset: 3px;
}

@media (max-width: 420px) {
  .card {
    padding: 2rem 1.25rem;
  }

  .button {
    width: 100%;
  }
}