/* ==========================================================================
   FSF Base Styles
   Reset, typography, and CSS variables
   ========================================================================== */

/* CSS Variables */
:root {
  /* Colors */
  --color-black: #000;
  --color-white: #fff;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #eee;
  --color-gray-300: #ddd;
  --color-gray-500: #666;
  --color-gray-700: #333;
  --color-accent: #f4c057;

  /* Typography */
  --font-primary: 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Poppins', var(--font-primary);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Layout */
  --max-width: 1200px;
  --container-padding: 2rem;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-gray-700);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  padding-top: 120px; /* Space for fixed header */
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-black);
}

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

p {
  margin-bottom: 1rem;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

/* Layout Utilities */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--spacing-lg) 0;
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }

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

  .section {
    padding: var(--spacing-md) 0;
  }
}