:root {
    /* Color Palette - Dark mode default */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;

    /* Glass surfaces */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-bg-hover: rgba(255, 255, 255, 0.08);
    --glass-bg-active: rgba(255, 255, 255, 0.12);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-highlight: rgba(255, 255, 255, 0.15);
    --glass-blur: 24px;
    --glass-saturate: 180%;

    /* Accent colors (vibrant blue -> purple) */
    --accent-primary: #6366f1; /* Indigo 500 */
    --accent-secondary: #a855f7; /* Purple 500 */
    --accent-tertiary: #ec4899; /* Pink 500 */
    
    /* Using modern oklch for gradients where supported (fallback to standard linear-gradient) */
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    
    /* Status colors */
    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.15);
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.15);
    --color-danger: #ef4444;
    --color-danger-bg: rgba(239, 68, 68, 0.15);
    --color-info: #3b82f6;
    --color-info-bg: rgba(59, 130, 246, 0.15);

    /* Priorities */
    --priority-low: #3b82f6;
    --priority-normal: #10b981;
    --priority-high: #f59e0b;
    --priority-urgent: #ef4444;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --text-primary: rgba(255, 255, 255, 0.95);
    --text-secondary: rgba(255, 255, 255, 0.65);
    --text-muted: rgba(255, 255, 255, 0.4);

    /* Spacing scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border radius - progressive enhancement with squircle */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Layered shadows for depth */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3), 0 1px 4px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.2);
    --shadow-glow-danger: 0 0 20px rgba(239, 68, 68, 0.2);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --sidebar-width: 260px;
    --header-height: 70px;
}

@supports (color: color-mix(in oklch, red, blue)) {
    :root {
        --accent-gradient: linear-gradient(135deg in oklch, var(--accent-primary), var(--accent-secondary));
    }
}

@property --angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}