/* ============================================
   CSS Variables - Space-Nebula Dark Theme
   ============================================ */
:root {
    /* Premium Enterprise SaaS Obsidian-Slate Dark Palette */
    --surface: #08090d;          /* Rich deep obsidian dark slate background */
    --surface-elevated: #111219; /* Elevated solid card background */
    --surface-variant: #191b26;  /* Muted active hover background */
    --surface-subtle: #0c0d15;   /* Very dark backing for input fields */
    --on-surface: #ffffff;       /* Pure high-contrast white text */
    --on-surface-secondary: #9ea4b4; /* Complementary periwinkle slate text */
    --on-surface-tertiary: #64748b;  /* Muted slate text */
    --border: rgba(255, 255, 255, 0.05); /* Thin elegant border */
    --border-subtle: rgba(255, 255, 255, 0.02);
    
    /* Royal Violet Enterprise Accents */
    --primary: #584cf4;          /* Vibrant royal violet primary */
    --primary-hover: #4a3ee3;    /* Royal violet hover state */
    --primary-light: rgba(88, 76, 244, 0.12);
    --primary-lighter: rgba(88, 76, 244, 0.06);
    
    --secondary: #06b6d4;        /* Cyan secondary */
    --secondary-hover: #22d3ee;  /* Lighter cyan */
    --secondary-light: rgba(6, 182, 212, 0.15);
    
    --gradient-primary: linear-gradient(135deg, #584cf4 0%, #8b5cf6 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --gradient-page: linear-gradient(180deg, #08090d 0%, #050608 100%);
    
    /* Technical status indicators */
    --accent-tan: #d97706;
    --accent-peach: #ea580c;
    --accent-mint: #0d9488;
    --accent-green: #10b981;
    --accent-amber: #f59e0b;
    --accent-red: #ef4444;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;
    --accent-blue: #3b82f6;
    
    /* Shadows with neon violet overlays damped for professional look */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.25);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    
    --glow-primary: 0 0 16px rgba(88, 76, 244, 0.15);
    --glow-accent: 0 0 16px rgba(6, 182, 212, 0.1);
    
    /* SaaS Minimalist Rounded Corners */
    --radius: 8px;
    --radius-lg: 12px;
    --radius-md: 8px;
    --radius-sm: 6px;
    --radius-xs: 4px;
    --radius-pill: 9999px;
    
    /* Transitions */
    --transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography - Geometric LINE Seed优先 */
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    --font-sans: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* Light Theme Override - Clean Enterprise Slate Light */
[data-theme="light"] {
    --surface: #f8fafc;          /* Off-white slate background */
    --surface-elevated: #ffffff; /* Pure white containers */
    --surface-variant: #f1f5f9;  /* Muted slate-100 hover */
    --surface-subtle: #f8fafc;
    --on-surface: #0f172a;       /* Dark slate primary text */
    --on-surface-secondary: #475569; /* Slate gray secondary text */
    --on-surface-tertiary: #64748b;  /* Muted text */
    --border: #e2e8f0;           /* Crisp light border */
    --border-subtle: #f1f5f9;
    
    --primary: #584cf4;          /* Modern SaaS violet */
    --primary-hover: #4a3ee3;
    --primary-light: rgba(88, 76, 244, 0.08);
    --primary-lighter: rgba(88, 76, 244, 0.04);
    --on-primary-active: #ffffff;
    
    --secondary: #0891b2;
    --secondary-hover: #0e7490;
    --secondary-light: rgba(8, 145, 178, 0.08);
    
    --gradient-primary: linear-gradient(135deg, #584cf4 0%, #7c3aed 100%);
    --gradient-accent: linear-gradient(135deg, #0891b2 0%, #0284c7 100%);
    --gradient-page: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.06), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
    
    --glow-primary: 0 0 16px rgba(88, 76, 244, 0.05);
    --glow-accent: 0 0 16px rgba(8, 145, 178, 0.05);
}