* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-xxl: 8rem;
  
  --color-text: #1a1a1a;
  --color-text-light: #666;
  --color-border: #e0e0e0;
  
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background-color: #ffffff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.7;
}

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

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  :root {
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
  }
}