/* Rosetta Design System - Global Styles */

:root {
  /* Colors - GOV.UK inspired palette */
  --color-primary: #0b0c0c;
  --color-accent: #1d70b8;
  --color-accent-hover: #003078;
  --color-success: #00703c;
  --color-warning: #d4351c;
  
  --color-white: #ffffff;
  --color-surface: #f3f2f1;
  --color-border: #b1b4b6;
  --color-text: #0b0c0c;
  --color-text-secondary: #505a5f;
  
  /* Typography */
  --font-family: 'GDS Transport', Arial, sans-serif;
  --font-size-base: 1rem;
  --line-height: 1.5;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  
  /* Breakpoints (for reference) */
  /* Mobile: < 640px */
  /* Tablet: 640px - 1024px */
  /* Desktop: > 1024px */
}

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: var(--space-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

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

a {
  color: var(--color-accent);
  text-decoration: underline;
}

a:hover {
  color: var(--color-accent-hover);
}

a:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Focus states for accessibility */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Utility classes */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}