:root {
  /* Colors - High Contrast */
  --color-primary: #E65100; /* Deep Orange */
  --color-secondary: #1565C0; /* Dark Blue */
  --color-accent: #FFA000; /* Amber */
  --color-background: #F5F5F5; /* Light Gray */
  --color-surface: #FFFFFF;
  --color-text-main: #212121; /* Near Black */
  --color-text-sub: #616161; /* Medium Gray */
  --color-border: #BDBDBD; /* Visible Gray */
  --color-danger: #C62828; /* Red for emphasis */

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  /* Typography */
  --font-family: "Helvetica Neue", arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", meiryo, sans-serif;
  --font-size-base: 16px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgb(0 0 0 / 8%);
  --shadow-md: 0 4px 8px rgb(0 0 0 / 12%);
  --shadow-lg: 0 8px 16px rgb(0 0 0 / 15%);
}