:root {
    /* Colors */
    --color-primary: #1A1A1A;
    --color-primary-rgb: 26, 26, 26;
    --color-accent: #007AFF;
    /* Apple/Modern Blue */
    --color-accent-rgb: 0, 122, 255;
    --color-success: #34C759;
    --color-danger: #FF3B30;
    --color-warning: #FF9500;

    --color-bg-body: #F5F5F7;
    --color-bg-surface: #FFFFFF;
    --color-bg-surface-translucent: rgba(255, 255, 255, 0.8);

    --color-text-main: #1D1D1F;
    --color-text-secondary: #86868B;
    --color-text-inverse: #FFFFFF;

    --color-border: #E5E5EA;

    /* Typography */
    --font-family-base: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-xxl: 2rem;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --container-width: 1200px;
    --header-height: 150px;
    --bottom-nav-height: 60px;

    /* Effects */
    --shadow-sm: 0 1px 2px 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-float: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    --backdrop-blur: blur(20px);
}

/* Dark Mode Support (Basic Preparation) */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-body: #000000;
        --color-bg-surface: #1C1C1E;
        --color-bg-surface-translucent: rgba(28, 28, 30, 0.8);
        --color-text-main: #3a3a3b;
        --color-text-secondary: #86868B;
        --color-border: #38383A;
    }
}