/* CSS Variables & Design System - Sleek Dark Mode */
:root {
  /* Primary Colors */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;

  /* Sleek Dark Mode */
  --bg-primary: #0a0a0a;
  --bg-secondary: #171717;
  --bg-tertiary: #262626;
  --text-primary: #fafafa;
  --text-secondary: #a3a3a3;
  --text-tertiary: #737373;
  --border: #262626;
  --border-dark: #404040;

  /* Status Colors */
  --success: #22c55e;
  --warning: #eab308;
  --error: #ef4444;

  /* Password Strength Colors */
  --strength-weak: #ef4444;
  --strength-medium: #eab308;
  --strength-strong: #22c55e;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Minimal Shadows */
  --shadow-sm: 0 0 0 1px rgba(255, 255, 255, 0.05);
  --shadow-md: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 8px 24px rgba(0, 0, 0, 0.6);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
}

/* CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--space-md);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-light);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }
.font-mono { font-family: var(--font-mono); }

/* Loader */
.loader {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
}

.loader-content h2 {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.loader-content p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
}