@charset "UTF-8";

/**
 * Modern CSS Variables - Apple-Inspired Design System
 * 
 * Purpose: Core design tokens for the modern UI upgrade
 * Inspired by: Apple's design language & https://www.applegadgetsbd.com/
 * 
 * Features:
 * - Dynamic theme color integration (backend-controlled)
 * - Apple-inspired color palette
 * - Comprehensive spacing scale
 * - Typography system
 * - Shadow & elevation system
 * - Transition & animation variables
 * - Responsive breakpoint constants
 * 
 * Usage: Load this file first before any other modern CSS
 * 
 * @charset UTF-8
 * @version 1.0.0
 * @date 2026-01-21
 */

:root {
    /* ============================================================
       COLOR SYSTEM - Apple-Inspired Palette
       ============================================================ */
    
    /* Primary Brand Colors (Dynamic - from backend theme) */
    /* These integrate with existing var(--primary) from app.blade.php */
    --modern-primary: var(--primary, #007AFF);
    --modern-primary-hover: var(--primary-hover, #0051D5);
    --modern-primary-light: rgba(0, 122, 255, 0.1);
    --modern-primary-rgb: 0, 122, 255;
    
    /* Secondary Colors */
    --modern-secondary: var(--secondary, #8E8E93);
    --modern-secondary-hover: var(--secondary-hover, #636366);
    --modern-secondary-light: rgba(142, 142, 147, 0.1);
    
    /* Neutral Colors - Apple-style grays */
    --modern-black: #000000;
    --modern-gray-900: #1C1C1E;  /* Almost Black */
    --modern-gray-800: #2C2C2E;  /* Dark Gray */
    --modern-gray-700: #3A3A3C;  /* Medium Dark */
    --modern-gray-600: #48484A;  /* Medium */
    --modern-gray-500: #636366;  /* Medium Light */
    --modern-gray-400: #8E8E93;  /* Light */
    --modern-gray-300: #AEAEB2;  /* Very Light */
    --modern-gray-200: #C7C7CC;  /* Super Light */
    --modern-gray-100: #D1D1D6;  /* Ultra Light */
    --modern-gray-50: #F2F2F7;   /* Background */
    --modern-white: #FFFFFF;
    
    /* Surface Colors */
    --modern-surface-primary: #FFFFFF;
    --modern-surface-secondary: #F2F2F7;
    --modern-surface-tertiary: #E5E5EA;
    --modern-surface-elevated: #FFFFFF;
    
    /* Semantic Colors */
    --modern-success: #34C759;      /* Green */
    --modern-success-light: rgba(52, 199, 89, 0.1);
    --modern-warning: #FF9500;      /* Orange */
    --modern-warning-light: rgba(255, 149, 0, 0.1);
    --modern-error: #FF3B30;        /* Red */
    --modern-error-light: rgba(255, 59, 48, 0.1);
    --modern-info: #007AFF;         /* Blue */
    --modern-info-light: rgba(0, 122, 255, 0.1);
    
    /* Discount & Price Colors */
    --modern-discount: var(--discount-text, #FF3B30);
    --modern-price: var(--primary, #007AFF);
    --modern-old-price: var(--modern-gray-400);
    
    /* Text Colors */
    --modern-text-primary: var(--text-primary, #1C1C1E);
    --modern-text-secondary: var(--text-secondary, #8E8E93);
    --modern-text-tertiary: #AEAEB2;
    --modern-text-inverse: #FFFFFF;
    --modern-text-link: var(--modern-primary);
    --modern-text-link-hover: var(--modern-primary-hover);
    
    /* Border Colors */
    --modern-border-primary: var(--border-color, #D1D1D6);
    --modern-border-secondary: #E5E5EA;
    --modern-border-light: #F2F2F7;
    --modern-border-focus: var(--modern-primary);
    
    /* Overlay & Backdrop */
    --modern-overlay: rgba(0, 0, 0, 0.5);
    --modern-overlay-light: rgba(0, 0, 0, 0.3);
    --modern-backdrop-blur: blur(20px);
    
    /* Glassmorphism */
    --modern-glass-bg: rgba(255, 255, 255, 0.8);
    --modern-glass-border: rgba(255, 255, 255, 0.2);
    
    
    /* ============================================================
       SPACING SCALE - 4px base unit
       ============================================================ */
    
    /* Base unit: 4px (0.25rem) */
    --space-0: 0;
    --space-1: 0.25rem;    /* 4px */
    --space-2: 0.5rem;     /* 8px */
    --space-3: 0.75rem;    /* 12px */
    --space-4: 1rem;       /* 16px - base */
    --space-5: 1.25rem;    /* 20px */
    --space-6: 1.5rem;     /* 24px */
    --space-7: 1.75rem;    /* 28px */
    --space-8: 2rem;       /* 32px */
    --space-10: 2.5rem;    /* 40px */
    --space-12: 3rem;      /* 48px */
    --space-14: 3.5rem;    /* 56px */
    --space-16: 4rem;      /* 64px */
    --space-20: 5rem;      /* 80px */
    --space-24: 6rem;      /* 96px */
    
    /* Common spacing shortcuts */
    --spacing-xs: var(--space-2);   /* 8px */
    --spacing-sm: var(--space-3);   /* 12px */
    --spacing-md: var(--space-4);   /* 16px */
    --spacing-lg: var(--space-6);   /* 24px */
    --spacing-xl: var(--space-8);   /* 32px */
    --spacing-2xl: var(--space-12); /* 48px */
    
    
    /* ============================================================
       TYPOGRAPHY SCALE
       ============================================================ */
    
    /* Font Families */
    --font-system: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 
                   'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-display: var(--font-system);
    --font-body: var(--font-system);
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;
    
    /* Font Sizes - Type Scale (1.250 - Major Third) */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px - body */
    --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 */
    
    /* Font Weights - Apple System */
    --font-thin: 100;
    --font-light: 300;
    --font-regular: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-heavy: 800;
    --font-black: 900;
    
    /* 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;
    
    
    /* ============================================================
       BORDER RADIUS - Apple-style rounded corners
       ============================================================ */
    
    --radius-none: 0;
    --radius-xs: 0.25rem;    /* 4px */
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-3xl: 2rem;      /* 32px */
    --radius-full: 9999px;   /* Pill shape */
    
    /* Component-specific radii */
    --radius-button: var(--radius-xl);      /* 16px - Apple button style */
    --radius-card: var(--radius-lg);        /* 12px - Product cards */
    --radius-modal: var(--radius-2xl);      /* 24px - Modals */
    --radius-input: var(--radius-md);       /* 8px - Form inputs */
    --radius-badge: var(--radius-full);     /* Pill - Badges */
    
    
    /* ============================================================
       SHADOWS & ELEVATION - Apple-style depth
       ============================================================ */
    
    /* Elevation levels (0-5) */
    --shadow-none: none;
    
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1),
                 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
                 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
                 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
                 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Component-specific shadows */
    --shadow-card: var(--shadow-sm);
    --shadow-card-hover: var(--shadow-lg);
    --shadow-button: var(--shadow-xs);
    --shadow-button-hover: var(--shadow-sm);
    --shadow-modal: var(--shadow-2xl);
    --shadow-dropdown: var(--shadow-lg);
    --shadow-sticky: var(--shadow-md);
    
    /* Colored shadows (for primary buttons) */
    --shadow-primary: 0 4px 12px rgba(var(--modern-primary-rgb), 0.3);
    --shadow-primary-hover: 0 8px 20px rgba(var(--modern-primary-rgb), 0.4);
    
    
    /* ============================================================
       TRANSITIONS & ANIMATIONS
       ============================================================ */
    
    /* Durations - Apple-style timing */
    --duration-instant: 0ms;
    --duration-fast: 150ms;
    --duration-base: 250ms;
    --duration-slow: 350ms;
    --duration-slower: 500ms;
    
    /* Easing Functions - Apple bezier curves */
    --ease-default: cubic-bezier(0.4, 0, 0.2, 1);      /* ease-in-out */
    --ease-in: cubic-bezier(0.4, 0, 1, 1);             /* ease-in */
    --ease-out: cubic-bezier(0, 0, 0.2, 1);            /* ease-out */
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);       /* smooth */
    --ease-spring: cubic-bezier(0.68, -0.55, 0.27, 1.55); /* spring */
    --ease-bounce: cubic-bezier(0.68, -0.6, 0.32, 1.6);   /* bounce */
    
    /* Transition presets */
    --transition-fast: var(--duration-fast) var(--ease-default);
    --transition-base: var(--duration-base) var(--ease-default);
    --transition-slow: var(--duration-slow) var(--ease-default);
    
    --transition-all: all var(--transition-base);
    --transition-colors: background-color var(--transition-base), 
                         border-color var(--transition-base), 
                         color var(--transition-base);
    --transition-transform: transform var(--transition-base);
    --transition-opacity: opacity var(--transition-base);
    
    
    /* ============================================================
       Z-INDEX SCALE - Layering system
       ============================================================ */
    
    --z-base: 0;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-notification: 1080;
    --z-top: 9999;
    
    
    /* ============================================================
       RESPONSIVE BREAKPOINTS - Mobile-first
       ============================================================ */
    
    /* Breakpoint values (for reference in JS or media queries) */
    --breakpoint-xs: 0;
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1440px;
    --breakpoint-2xl: 1920px;
    
    /* Container widths */
    --container-sm: 540px;
    --container-md: 720px;
    --container-lg: 960px;
    --container-xl: 1200px;
    --container-2xl: 1320px;
    
    
    /* ============================================================
       COMPONENT-SPECIFIC VARIABLES
       ============================================================ */
    
    /* Buttons */
    --button-height-sm: 32px;
    --button-height-md: 44px;    /* iOS touch target minimum */
    --button-height-lg: 56px;
    --button-padding-x-sm: var(--space-4);
    --button-padding-x-md: var(--space-6);
    --button-padding-x-lg: var(--space-8);
    
    /* Form Inputs */
    --input-height-sm: 36px;
    --input-height-md: 44px;     /* iOS minimum for no zoom */
    --input-height-lg: 52px;
    --input-border-width: 1px;
    --input-focus-ring: 0 0 0 3px var(--modern-primary-light);
    
    /* Product Cards */
    --card-padding: var(--space-4);
    --card-gap: var(--space-4);
    --card-image-aspect: 1 / 1;  /* Square images */
    
    /* Navigation */
    --nav-height-mobile: 60px;
    --nav-height-desktop: 80px;
    --nav-bottom-height: 60px;
    
    /* Safe Areas (for notched phones) */
    --safe-area-inset-top: env(safe-area-inset-top, 0);
    --safe-area-inset-right: env(safe-area-inset-right, 0);
    --safe-area-inset-bottom: env(safe-area-inset-bottom, 0);
    --safe-area-inset-left: env(safe-area-inset-left, 0);
    
    
    /* ============================================================
       EFFECTS & FILTERS
       ============================================================ */
    
    /* Backdrop Filters (Glassmorphism) */
    --backdrop-blur-sm: blur(4px);
    --backdrop-blur-md: blur(12px);
    --backdrop-blur-lg: blur(20px);
    --backdrop-blur-xl: blur(40px);
    
    /* Opacity Levels */
    --opacity-0: 0;
    --opacity-10: 0.1;
    --opacity-20: 0.2;
    --opacity-30: 0.3;
    --opacity-40: 0.4;
    --opacity-50: 0.5;
    --opacity-60: 0.6;
    --opacity-70: 0.7;
    --opacity-80: 0.8;
    --opacity-90: 0.9;
    --opacity-100: 1;
    
    /* Blur Levels */
    --blur-none: 0;
    --blur-sm: 4px;
    --blur-md: 8px;
    --blur-lg: 16px;
    --blur-xl: 24px;
    --blur-2xl: 40px;
}


/* ============================================================
   PRINT STYLES VARIABLES
   ============================================================ */

@media print {
    :root {
        /* Optimize for print */
        --modern-text-primary: #000000;
        --modern-surface-primary: #FFFFFF;
        --shadow-card: none;
        --shadow-card-hover: none;
    }
}


/* ============================================================
   ACCESSIBILITY VARIABLES
   ============================================================ */

/* High contrast mode detection */
@media (prefers-contrast: high) {
    :root {
        --modern-border-primary: #000000;
        --modern-text-primary: #000000;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    :root {
        --duration-fast: 0ms;
        --duration-base: 0ms;
        --duration-slow: 0ms;
        --transition-all: none;
        --transition-colors: none;
        --transition-transform: none;
        --transition-opacity: none;
    }
}


/* ============================================================
   UTILITY: CSS Variable Debugging
   ============================================================ */

/* Uncomment to debug CSS variables in browser DevTools */
/*
html::before {
    content: "CSS Variables Loaded ✓";
    display: block;
    padding: 0.5rem;
    background: var(--modern-success);
    color: white;
    text-align: center;
    font-size: var(--text-sm);
}
*/