/* ============================================================
   UPSKILL.ID - CSS VARIABLES / DESIGN TOKENS
   ============================================================
   File ini berisi semua design tokens yang digunakan di seluruh 
   project UpSkill.id. Ubah nilai di sini untuk update global.
   
   Struktur:
   1. Colors (Warna)
   2. Typography (Font)
   3. Spacing (Jarak)
   4. Border Radius (Rounded corners)
   5. Shadows (Bayangan)
   6. Transitions (Animasi)
   7. Z-Index (Stacking order)
   8. Container Widths
============================================================ */

:root {
    /* ============================================
       1. COLORS (WARNA)
       ============================================ */
    
    /* Primary - Navy Blue (Warna Utama Brand) */
    --color-primary: #1E293B;
    --color-primary-dark: #0F172A;
    --color-primary-light: #334155;
    --color-primary-50: #F8FAFC;
    --color-primary-100: #F1F5F9;
    --color-primary-200: #E2E8F0;
    --color-primary-300: #CBD5E1;
    --color-primary-400: #94A3B8;
    --color-primary-500: #64748B;
    --color-primary-600: #475569;
    --color-primary-700: #334155;
    --color-primary-800: #1E293B;
    --color-primary-900: #0F172A;
    
    /* Secondary - Yellow (Warna Aksen) */
    --color-secondary: #EAB308;
    --color-secondary-dark: #CA8A04;
    --color-secondary-light: #FDE047;
    --color-secondary-50: #FEFCE8;
    --color-secondary-100: #FEF9C3;
    --color-secondary-200: #FEF08A;
    --color-secondary-300: #FDE047;
    --color-secondary-400: #FACC15;
    --color-secondary-500: #EAB308;
    --color-secondary-600: #CA8A04;
    --color-secondary-700: #A16207;
    
    /* Accent - Blue (Untuk link, info) */
    --color-accent: #3B82F6;
    --color-accent-dark: #2563EB;
    --color-accent-light: #60A5FA;
    
    /* Semantic Colors (Warna dengan makna spesifik) */
    --color-success: #10B981;
    --color-success-light: #D1FAE5;
    --color-warning: #F59E0B;
    --color-warning-light: #FEF3C7;
    --color-error: #EF4444;
    --color-error-light: #FEE2E2;
    --color-info: #3B82F6;
    --color-info-light: #DBEAFE;
    
    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;
    
    /* Text Colors */
    --color-text-primary: #1E293B;
    --color-text-secondary: #64748B;
    --color-text-tertiary: #94A3B8;
    --color-text-inverse: #FFFFFF;
    --color-text-link: #3B82F6;
    --color-text-link-hover: #2563EB;
    
    /* Background Colors */
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F8FAFC;
    --color-bg-tertiary: #F1F5F9;
    --color-bg-dark: #1E293B;
    --color-bg-darker: #0F172A;
    
    /* Border Colors */
    --color-border: #E2E8F0;
    --color-border-light: #F1F5F9;
    --color-border-dark: #CBD5E1;
    --color-border-focus: #EAB308;
    
    /* Overlay Colors */
    --color-overlay: rgba(0, 0, 0, 0.5);
    --color-overlay-light: rgba(0, 0, 0, 0.3);
    --color-overlay-dark: rgba(0, 0, 0, 0.7);
    
    
    /* ============================================
       2. TYPOGRAPHY (FONT)
       ============================================ */
    
    /* Font Family */
    --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 
                     'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 
                  'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    
    /* Font Sizes (dalam rem, 1rem = 16px) */
    --text-xs: 0.75rem;      /* 12px - Small text, badges */
    --text-sm: 0.875rem;     /* 14px - Secondary text */
    --text-base: 1rem;       /* 16px - Body text default */
    --text-lg: 1.125rem;     /* 18px - Large body */
    --text-xl: 1.25rem;      /* 20px - Small headings */
    --text-2xl: 1.5rem;      /* 24px - Section headings */
    --text-3xl: 1.875rem;    /* 30px - Page headings */
    --text-4xl: 2.25rem;     /* 36px - H2 large */
    --text-5xl: 3rem;        /* 48px - H1 medium */
    --text-6xl: 3.75rem;     /* 60px - H1 large */
    --text-7xl: 4.5rem;      /* 72px - Display */
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 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;
    
    
    /* ============================================
       3. SPACING (JARAK)
       ============================================ */
    
    /* Spacing Scale (dalam rem) */
    --space-0: 0;
    --space-px: 1px;
    --space-0-5: 0.125rem;   /* 2px */
    --space-1: 0.25rem;      /* 4px */
    --space-1-5: 0.375rem;   /* 6px */
    --space-2: 0.5rem;       /* 8px */
    --space-2-5: 0.625rem;   /* 10px */
    --space-3: 0.75rem;      /* 12px */
    --space-3-5: 0.875rem;   /* 14px */
    --space-4: 1rem;         /* 16px */
    --space-5: 1.25rem;      /* 20px */
    --space-6: 1.5rem;       /* 24px */
    --space-7: 1.75rem;      /* 28px */
    --space-8: 2rem;         /* 32px */
    --space-9: 2.25rem;      /* 36px */
    --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 */
    --space-32: 8rem;        /* 128px */
    --space-40: 10rem;       /* 160px */
    --space-48: 12rem;       /* 192px */
    --space-56: 14rem;       /* 224px */
    --space-64: 16rem;       /* 256px */
    
    /* Semantic Spacing */
    --space-xs: 0.5rem;      /* 8px */
    --space-sm: 1rem;        /* 16px */
    --space-md: 1.5rem;      /* 24px */
    --space-lg: 2rem;        /* 32px */
    --space-xl: 3rem;        /* 48px */
    --space-2xl: 4rem;       /* 64px */
    --space-3xl: 6rem;       /* 96px */
    
    
    /* ============================================
       4. BORDER RADIUS
       ============================================ */
    
    --radius-none: 0;
    --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-3xl: 2rem;      /* 32px */
    --radius-full: 9999px;
    
    /* Border Widths */
    --border-0: 0;
    --border-1: 1px;
    --border-2: 2px;
    --border-4: 4px;
    --border-8: 8px;
    
    
    /* ============================================
       5. SHADOWS (BAYANGAN)
       ============================================ */
    
    /* Box Shadows */
    --shadow-none: none;
    --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);
    
    /* Colored Shadows (untuk buttons, cards) */
    --shadow-primary: 0 10px 20px -5px rgba(30, 41, 59, 0.3);
    --shadow-secondary: 0 10px 20px -5px rgba(234, 179, 8, 0.3);
    --shadow-accent: 0 10px 20px -5px rgba(59, 130, 246, 0.3);
    
    
    /* ============================================
       6. TRANSITIONS & ANIMATIONS
       ============================================ */
    
    /* Transition Durations */
    --duration-75: 75ms;
    --duration-100: 100ms;
    --duration-150: 150ms;
    --duration-200: 200ms;
    --duration-300: 300ms;
    --duration-500: 500ms;
    --duration-700: 700ms;
    --duration-1000: 1000ms;
    
    /* Transition Timing Functions */
    --ease-linear: linear;
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Common Transitions */
    --transition-fast: all 150ms ease-in-out;
    --transition-base: all 300ms ease-in-out;
    --transition-slow: all 500ms ease-in-out;
    
    
    /* ============================================
       7. Z-INDEX (Layer Order)
       ============================================ */
    
    --z-0: 0;
    --z-10: 10;
    --z-20: 20;
    --z-30: 30;
    --z-40: 40;
    --z-50: 50;
    --z-auto: auto;
    
    /* Semantic Z-Index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
    
    
    /* ============================================
       8. CONTAINER WIDTHS
       ============================================ */
    
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
    --container-max: 1400px;
    
    /* Content Widths */
    --content-narrow: 640px;
    --content-normal: 800px;
    --content-wide: 1000px;
    
    
    /* ============================================
       9. BREAKPOINTS (untuk reference di CSS)
       ============================================ */
    
    /* Note: Breakpoints digunakan di @media queries */
    /* --breakpoint-sm: 640px; */
    /* --breakpoint-md: 768px; */
    /* --breakpoint-lg: 1024px; */
    /* --breakpoint-xl: 1280px; */
    /* --breakpoint-2xl: 1536px; */
}


/* ============================================================
   DARK MODE (Opsional - untuk implementasi nanti)
============================================================ */

/* 
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-primary: #0F172A;
        --color-bg-secondary: #1E293B;
        --color-text-primary: #F8FAFC;
        --color-text-secondary: #CBD5E1;
        --color-border: #334155;
    }
}
*/