/* ===== Apple Design System Variables ===== */
:root {
    /* Colors - Light minimalist palette */
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-bg-tertiary: #fafafa;
    --color-text: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-text-tertiary: #86868b;
    --color-border: #d2d2d7;
    --color-border-light: #e5e5e7;
    --color-accent: #007aff;
    --color-accent-hover: #0051d5;
    --color-success: #34c759;
    --color-warning: #ff9500;
    --color-error: #ff3b30;
    
    /* Code block colors - Light theme */
    --code-bg: #f6f6f8;
    --code-border: #e8e8ed;
    --code-text: #2d2d2d;
    --code-comment: #8e8e93;
    --code-keyword: #ad3da4;
    --code-string: #d12f1b;
    --code-function: #3e8087;
    --code-number: #272ad8;
    --code-variable: #5c2699;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: Menlo, Monaco, "SFMono-Regular", "Courier New", monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Borders */
    --border-radius-sm: 6px;
    --border-radius-md: 12px;
    --border-radius-lg: 18px;
    --border-radius-full: 9999px;
    
    /* Shadows - Subtle Apple-style */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --container-width: 1200px;
    --container-width-wide: 1400px;
    --header-height: 64px;
}