:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --text-primary: #212529;
  --text-secondary: #495057;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --radius-md: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1f2937;
    --bg-secondary: #111827;
    --text-primary: #f9fafb;
    --text-secondary: #e5e7eb;
    --primary: #6366f1;
    --primary-hover: #818cf8;
  }
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  padding: 2rem;
  line-height: 1.6;
}

.container {
  background-color: var(--bg-primary);
  padding: 3rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  max-width: 500px;
  width: 100%;
  text-align: center;
}

h1 {
  margin: 0 0 1rem 0;
  font-size: 2rem;
  font-weight: 600;
}

.brand-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 1rem;
}

p {
  color: var(--text-secondary);
  margin: 0 0 2rem 0;
  font-size: 1.1rem;
}

a {
  display: inline-block;
  padding: 0.75rem 2rem;
  background-color: var(--primary);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: background-color 0.2s ease, transform 0.1s ease;
  font-size: 1rem;
}

a:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

a:active {
  transform: translateY(0);
}