/* Design Tokens */
:root {
  /* Colors - Dark Mode by Default */
  --color-bg: #0a0a0a;
  --color-bg-elevated: #141414;
  --color-bg-card: #1a1a1a;
  --color-surface: #222222;

  --color-text-primary: #f5f5f5;
  --color-text-secondary: #a0a0a0;
  --color-text-tertiary: #666666;

  /* Primary/Accent - Indigo */
  --color-primary: #6366f1;
  --color-primary-rgb: 99, 102, 241;
  --color-primary-hover: #4f46e5;
  --color-primary-light: rgba(99, 102, 241, 0.1);

  --color-accent: #6366f1;
  --color-accent-hover: #4f46e5;
  --color-accent-light: rgba(99, 102, 241, 0.1);
  --color-accent-rgb: 99, 102, 241;

  /* Success - Emerald */
  --color-success: #10b981;
  --color-success-rgb: 16, 185, 129;
  --color-success-hover: #059669;
  --color-success-light: rgba(16, 185, 129, 0.1);

  /* Error - Red */
  --color-error: #ef4444;
  --color-error-rgb: 239, 68, 68;
  --color-error-hover: #dc2626;
  --color-error-light: rgba(239, 68, 68, 0.1);

  /* Warning - Amber */
  --color-warning: #f59e0b;
  --color-warning-rgb: 245, 158, 11;
  --color-warning-hover: #d97706;
  --color-warning-light: rgba(245, 158, 11, 0.1);

  /* Info - Sky Blue */
  --color-info: #0ea5e9;
  --color-info-rgb: 14, 165, 233;
  --color-info-hover: #0284c7;
  --color-info-light: rgba(14, 165, 233, 0.1);

  /* Secondary - Gray */
  --color-secondary: #6b7280;
  --color-secondary-rgb: 107, 114, 128;
  --color-secondary-hover: #4b5563;
  --color-secondary-light: rgba(107, 114, 128, 0.1);

  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.12);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;

  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;     /* 18px */
  --font-size-xl: 1.25rem;      /* 20px */
  --font-size-2xl: 1.5rem;      /* 24px */
  --font-size-3xl: 1.875rem;    /* 30px */
  --font-size-4xl: 2.25rem;     /* 36px */
  --font-size-5xl: 3rem;        /* 48px */
  --font-size-6xl: 3.75rem;     /* 60px */

  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-weight-black: 900;

  /* Line Heights - 바이올렛 스타일 (1.45 기본) */
  --line-height-tight: 1.25;
  --line-height-base: 1.45;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */

  /* Border Radius - 바이올렛 스타일 (4-32px 범위) */
  --radius-xs: 0.25rem;   /* 4px */
  --radius-sm: 0.5rem;    /* 8px */
  --radius-base: 0.75rem; /* 12px */
  --radius-lg: 1rem;      /* 16px */
  --radius-xl: 1.5rem;    /* 24px */
  --radius-2xl: 2rem;     /* 32px */
  --radius-full: 9999px;

  /* Shadows - 바이올렛 스타일 (부드러운 그림자) */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 1px 4px 0 rgba(0, 0, 0, 0.25);
  --shadow-base: 0 2px 8px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px 0 rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 20px 0 rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 12px 32px 0 rgba(0, 0, 0, 0.45);
  --shadow-2xl: 0 16px 48px 0 rgba(0, 0, 0, 0.5);

  /* Elevation shadows for cards/components */
  --shadow-card: 0 2px 8px 0 rgba(0, 0, 0, 0.3);
  --shadow-card-hover: 0 4px 16px 0 rgba(0, 0, 0, 0.4);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index */
  --z-header: 100;
  --z-modal: 200;
  --z-toast: 300;

  /* Layout */
  --container-max: 1280px;
  --container-padding: var(--space-6);
  --header-height: 70px;
}

/* Mobile adjustments */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-5xl: 2.5rem;
    --font-size-6xl: 3rem;
    --container-padding: var(--space-4);
    --header-height: 64px;
  }
}