/* CSS Variables - Design Tokens */
:root {
  /* Color Palette - Based on iOS App (Rurikon) */
  --color-primary: #005CAF;           /* Rurikon 700 - Main brand color */
  --color-primary-light: #34A6FC;     /* Rurikon 400 - Light accent */
  --color-primary-dark: #004A8F;      /* Darker Rurikon for hover states */
  --color-secondary: #BF8804;         /* Brown 600 - Complementary color */
  --color-secondary-light: #E5C0A1;   /* Apricot 300 - Light accent */
  --color-secondary-dark: #A07003;    /* Darker Brown */
  --color-accent: #E5C0A1;            /* Apricot 300 - Accent color */

  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-lighter: #999999;
  --color-background: #FFF8F2;  /* Warm beige background */
  --color-background-light: #FFFFFF;  /* White for lighter sections */
  --color-background-dark: #E9ECEF;

  --color-success: #51CF66;
  --color-warning: #FFA94D;
  --color-error: #FF6B6B;
  --color-info: #4DABF7;

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Noto Sans JP', 'Yu Gothic', 'YuGothic', 'Meiryo', sans-serif;
  --font-family-heading: -apple-system, BlinkMacSystemFont, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Noto Sans JP', sans-serif;

  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-md: 1.125rem;   /* 18px */
  --font-size-lg: 1.25rem;    /* 20px */
  --font-size-xl: 1.5rem;     /* 24px */
  --font-size-2xl: 2rem;      /* 32px */
  --font-size-3xl: 2.5rem;    /* 40px */
  --font-size-4xl: 3rem;      /* 48px */

  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --spacing-xs: 0.5rem;     /* 8px */
  --spacing-sm: 1rem;       /* 16px */
  --spacing-md: 1.5rem;     /* 24px */
  --spacing-lg: 2rem;       /* 32px */
  --spacing-xl: 3rem;       /* 48px */
  --spacing-2xl: 4rem;      /* 64px */
  --spacing-3xl: 6rem;      /* 96px */
  --spacing-4xl: 8rem;      /* 128px */

  /* Border Radius */
  --radius-sm: 0.25rem;     /* 4px */
  --radius-md: 0.5rem;      /* 8px */
  --radius-lg: 0.75rem;     /* 12px */
  --radius-xl: 1rem;        /* 16px */
  --radius-2xl: 1.5rem;     /* 24px */
  --radius-full: 9999px;    /* Full rounded */

  /* Shadows */
  --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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* Container Max Width */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1400px;

  /* Breakpoints (for reference in media queries) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}