:root {
  /* Colors */
  --color-primary: #1a73e8; /* Enterprise blue */
  --color-primary-dark: #1557b0;
  --color-secondary: #00e676; /* Accent green */
  --color-surface: #ffffff;
  --color-surface-alt: #f8f9fa;
  --color-text: #202124;
  --color-text-muted: #5f6368;
  --color-danger: #ea4335;
  --color-warning: #fbbc04;
  --color-border: #dadce0;

  /* Typography */
  --font-family-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3.5rem;
  
  /* Spacing (Fluid/Responsive feel) */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --spacing-2xl: 6rem;

  /* Borders & Shadows */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  /* Motion */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-normal: 0ms;
  }
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-family-sans);
  color: var(--color-text);
  background-color: var(--color-surface);
  line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  color: #111;
  font-weight: 700;
  line-height: 1.2;
}
h1 { font-size: var(--font-size-4xl); letter-spacing: -0.02em; }
h2 { font-size: var(--font-size-3xl); letter-spacing: -0.01em; }
h3 { font-size: var(--font-size-2xl); }
p { margin-top: 0; margin-bottom: var(--spacing-md); color: var(--color-text-muted); }

/* Layout Grid */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}
.grid {
  display: grid;
  gap: var(--spacing-lg);
}
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* Sections */
.section { padding: var(--spacing-2xl) 0; }
.section-alt { background-color: var(--color-surface-alt); }