/* ==========================================================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700&display=swap');

:root {
    /* Color Palette - Vibrant, Modern Corporate */
    --primary: #0ea5e9; /* Sky Blue */
    --primary-dark: #0284c7;
    --primary-light: #38bdf8;
    
    --secondary: #10b981; /* Emerald Green (Eco/Recycling) */
    --secondary-dark: #059669;
    --secondary-light: #34d399;

    --accent: #f59e0b; /* Amber */
    
    /* Neutral Colors / Slate */
    --bg-main: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    
    --text-main: #334155;
    --text-light: #64748b;
    --text-dark: #0f172a;
    --text-white: #ffffff;
    
    /* Borders */
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;
    
    /* Spacing System */
    --space-xs: 0.5rem;   /* 8px */
    --space-sm: 1rem;     /* 16px */
    --space-md: 1.5rem;   /* 24px */
    --space-lg: 2rem;     /* 32px */
    --space-xl: 3rem;     /* 48px */
    --space-xxl: 5rem;    /* 80px */
    
    /* Layout */
    --container-width: 1200px;
    --header-height: 80px;
    
    /* Borders & Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 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-glow: 0 0 20px rgba(16, 185, 129, 0.3);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ==========================================================================
   CSS RESET
   ========================================================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

ul, ol {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-normal);
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

input, button, textarea, select {
    font: inherit;
}

/* ==========================================================================
   GLOBAL TYPOGRAPHY
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-dark);
    line-height: 1.2;
    font-weight: 700;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-bottom: var(--space-md);
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.75rem);
    margin-bottom: var(--space-sm);
}

p {
    margin-bottom: var(--space-md);
}

.text-center { text-align: center; }
.text-light { color: var(--text-light); }
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--space-sm) !important; }
.mb-2 { margin-bottom: var(--space-md) !important; }
.mb-3 { margin-bottom: var(--space-lg) !important; }
.mb-4 { margin-bottom: var(--space-xl) !important; }

/* Utilities */
.hidden { display: none !important; }