/* ============================================
   CSS Variables - AppCraft Landing Page
   ============================================ */

:root {
  /* ========== Colors ========== */
  
  /* Primary Colors */
  --color-deep-black: #0A0A0F;
  --color-dark-navy: #0D1117;
  --color-electric-blue: #00D4FF;
  --color-neon-purple: #8B5CF6;
  --color-cyber-green: #10B981;
  --color-hot-pink: #F472B6;
  --color-pure-white: #FFFFFF;
  --color-soft-gray: #94A3B8;
  
  /* Additional Colors */
  --color-dark-gray: #1E293B;
  --color-medium-gray: #334155;
  --color-light-gray: #CBD5E1;
  --color-error: #EF4444;
  --color-warning: #F59E0B;
  --color-success: #10B981;
  
  /* RGB Values for rgba() usage */
  --rgb-deep-black: 10, 10, 15;
  --rgb-dark-navy: 13, 17, 23;
  --rgb-electric-blue: 0, 212, 255;
  --rgb-neon-purple: 139, 92, 246;
  --rgb-cyber-green: 16, 185, 129;
  --rgb-hot-pink: 244, 114, 182;
  --rgb-pure-white: 255, 255, 255;
  --rgb-soft-gray: 148, 163, 184;
  
  /* ========== Gradients ========== */
  
  /* Primary gradient for buttons and accents */
  --gradient-primary: linear-gradient(135deg, #00D4FF 0%, #8B5CF6 100%);
  --gradient-primary-reverse: linear-gradient(135deg, #8B5CF6 0%, #00D4FF 100%);
  
  /* Gradient for section backgrounds */
  --gradient-bg: linear-gradient(180deg, #0A0A0F 0%, #0D1117 50%, #0A0A0F 100%);
  --gradient-bg-radial: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
  
  /* Gradient for cards on hover */
  --gradient-card: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  --gradient-card-hover: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
  
  /* Text gradients */
  --gradient-text: linear-gradient(90deg, #00D4FF 0%, #8B5CF6 50%, #F472B6 100%);
  
  /* Button gradients */
  --gradient-btn-primary: linear-gradient(135deg, #00D4FF 0%, #8B5CF6 100%);
  --gradient-btn-secondary: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
  
  /* ========== Glow Effects ========== */
  --glow-blue: 0 0 20px rgba(0, 212, 255, 0.5);
  --glow-blue-strong: 0 0 40px rgba(0, 212, 255, 0.7);
  --glow-purple: 0 0 20px rgba(139, 92, 246, 0.5);
  --glow-purple-strong: 0 0 40px rgba(139, 92, 246, 0.7);
  --glow-green: 0 0 20px rgba(16, 185, 129, 0.5);
  --glow-pink: 0 0 20px rgba(244, 114, 182, 0.5);
  --glow-white: 0 0 20px rgba(255, 255, 255, 0.3);
  
  /* ========== Typography ========== */
  
  /* Font Families */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Space Grotesk', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  --text-7xl: 4.5rem;      /* 72px */
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;
  
  /* ========== Spacing ========== */
  --space-0: 0;
  --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 */
  
  /* ========== Sizes ========== */
  
  /* Container */
  --container-max: 1200px;
  --container-padding: 1.5rem;
  
  /* Header */
  --header-height: 80px;
  --header-height-scrolled: 70px;
  
  /* Border Radius */
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;
  
  /* ========== Shadows ========== */
  --shadow-sm: 0 1px 2px 0 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-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  
  /* Dark theme shadows */
  --shadow-dark-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-dark-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-dark-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-dark-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
  
  /* ========== Transitions ========== */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-slower: 700ms ease;
  
  /* Specific transitions */
  --transition-color: color 300ms ease, background-color 300ms ease, border-color 300ms ease;
  --transition-transform: transform 300ms ease;
  --transition-opacity: opacity 300ms ease;
  --transition-all: all 300ms ease;
  
  /* Cubic bezier easing */
  --ease-in-out-quad: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in-out-cubic: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* ========== Z-Index ========== */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  
  /* ========== Borders ========== */
  --border-width: 1px;
  --border-style: solid;
  --border-color: rgba(148, 163, 184, 0.2);
  --border-color-light: rgba(148, 163, 184, 0.1);
  --border-color-dark: rgba(148, 163, 184, 0.3);
  
  /* ========== Glassmorphism ========== */
  --glass-bg: rgba(13, 17, 23, 0.8);
  --glass-bg-light: rgba(13, 17, 23, 0.6);
  --glass-blur: blur(20px);
  --glass-blur-strong: blur(40px);
  
  /* ========== Animation Durations ========== */
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 700ms;
  --duration-slowest: 1000ms;
}

/* ========== Dark Mode (default) ========== */
[data-theme="dark"] {
  --color-bg-primary: var(--color-deep-black);
  --color-bg-secondary: var(--color-dark-navy);
  --color-text-primary: var(--color-pure-white);
  --color-text-secondary: var(--color-soft-gray);
}

/* ========== Light Mode (optional) ========== */
[data-theme="light"] {
  --color-bg-primary: var(--color-pure-white);
  --color-bg-secondary: #F8FAFC;
  --color-text-primary: var(--color-deep-black);
  --color-text-secondary: var(--color-medium-gray);
}