/**
 * TreeFund - Comprehensive Design System
 * Modern, Nature-Inspired UI with Professional Aesthetics
 * 
 * Table of Contents:
 * 1. CSS Variables & Custom Properties
 * 2. Reset & Base Styles
 * 3. Typography System
 * 4. Layout Components
 * 5. Navigation & Header
 * 6. Hero Sections
 * 7. Card Components
 * 8. Button System
 * 9. Form Elements
 * 10. Progress & Stats
 * 11. Modal & Overlay
 * 12. Footer Styles
 * 13. Utility Classes
 * 14. Animations & Transitions
 * 15. Responsive Breakpoints
 */

/* ============================================
   1. CSS Variables & Custom Properties
   ============================================ */
:root {
    /* Primary Green Palette */
    --primary-50: #E8F5E9;
    --primary-100: #C8E6C9;
    --primary-200: #A5D6A7;
    --primary-300: #81C784;
    --primary-400: #66BB6A;
    --primary-500: #4CAF50;
    --primary-600: #43A047;
    --primary-700: #388E3C;
    --primary-800: #2E7D32;
    --primary-900: #1B5E20;
    
    /* Primary Aliases */
    --primary: var(--primary-800);
    --primary-dark: var(--primary-900);
    --primary-light: var(--primary-500);
    --primary-lighter: var(--primary-300);
    --primary-pale: var(--primary-100);
    --primary-bg: var(--primary-50);
    
    /* Earth Tones */
    --earth-50: #EFEBE9;
    --earth-100: #D7CCC8;
    --earth-200: #BCAAA4;
    --earth-300: #A1887F;
    --earth-400: #8D6E63;
    --earth-500: #795548;
    --earth-600: #6D4C41;
    --earth-700: #5D4037;
    --earth-800: #4E342E;
    --earth-900: #3E2723;
    
    --earth: var(--earth-700);
    --earth-dark: var(--earth-900);
    --earth-light: var(--earth-500);
    
    /* Accent Gold */
    --accent-50: #FFF8E1;
    --accent-100: #FFECB3;
    --accent-200: #FFE082;
    --accent-300: #FFD54F;
    --accent-400: #FFCA28;
    --accent-500: #FFC107;
    --accent-600: #FFB300;
    --accent-700: #FFA000;
    --accent-800: #FF8F00;
    --accent-900: #FF6F00;
    
    --accent: var(--accent-500);
    --accent-dark: var(--accent-700);
    --accent-light: var(--accent-300);
    
    /* Secondary Blue */
    --secondary-50: #E1F5FE;
    --secondary-100: #B3E5FC;
    --secondary-200: #81D4FA;
    --secondary-300: #4FC3F7;
    --secondary-400: #29B6F6;
    --secondary-500: #03A9F4;
    --secondary-600: #039BE5;
    --secondary-700: #0288D1;
    --secondary-800: #0277BD;
    --secondary-900: #01579B;
    
    --secondary: var(--secondary-700);
    --secondary-dark: var(--secondary-900);
    --secondary-light: var(--secondary-500);
    
    /* Neutral Palette */
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #EEEEEE;
    --gray-300: #E0E0E0;
    --gray-400: #BDBDBD;
    --gray-500: #9E9E9E;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    --white: #FFFFFF;
    --black: #000000;
    --dark: #1A1A1A;
    --dark-light: #2D2D2D;
    --gray: var(--gray-700);
    --gray-light: var(--gray-500);
    --gray-lighter: var(--gray-300);
    --light: var(--gray-100);
    --lighter: var(--gray-50);
    
    /* Semantic Colors */
    --success: #10B981;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --error: #EF4444;
    --error-light: #FEE2E2;
    --info: #3B82F6;
    --info-light: #DBEAFE;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-500) 50%, var(--primary-300) 100%);
    --gradient-hero: linear-gradient(135deg, rgba(46, 125, 50, 0.95) 0%, rgba(76, 175, 80, 0.9) 50%, rgba(129, 199, 132, 0.85) 100%);
    --gradient-dark: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    --gradient-earth: linear-gradient(135deg, var(--earth-700) 0%, var(--earth-500) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-500) 0%, var(--accent-300) 100%);
    --gradient-nature: linear-gradient(180deg, var(--primary-50) 0%, var(--primary-100) 50%, var(--primary-200) 100%);
    --gradient-card: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.02) 100%);
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.12);
    --shadow-2xl: 0 24px 48px rgba(0, 0, 0, 0.15);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-glow: 0 0 40px rgba(46, 125, 50, 0.25);
    --shadow-glow-accent: 0 0 40px rgba(255, 193, 7, 0.25);
    
    /* Border Radius */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Typography */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-mono: 'Fira Code', 'Monaco', 'Consolas', monospace;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-slower: 500ms ease;
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-smooth: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-toast: 800;
    
    /* Layout */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1400px;
    --header-height: 80px;
}

/* ============================================
   2. Reset & Base Styles
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-relaxed);
    color: var(--dark);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Selection */
::selection {
    background-color: var(--primary);
    color: var(--white);
}

::-moz-selection {
    background-color: var(--primary);
    color: var(--white);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
    border: 2px solid var(--gray-100);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* Focus Styles */
:focus {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ============================================
   3. Typography System
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--dark);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: var(--text-5xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--text-4xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

p {
    margin-bottom: var(--space-4);
    color: var(--gray);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--primary-dark);
}

.text-display {
    font-family: var(--font-display);
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-accent {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   4. Layout Components
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }
.container-xl { max-width: var(--container-xl); }

.section {
    padding: var(--space-24) 0;
}

.section-sm {
    padding: var(--space-16) 0;
}

.section-lg {
    padding: var(--space-32) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-subtitle {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-5);
    background: var(--primary-bg);
    color: var(--primary);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    color: var(--dark);
    margin-bottom: var(--space-4);
}

.section-description {
    font-size: var(--text-lg);
    color: var(--gray);
    max-width: 640px;
    margin: 0 auto;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }

/* ============================================
   5. Navigation & Header
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    background: transparent;
    transition: all var(--transition-base);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
}

.site-header.transparent {
    background: transparent;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--space-6);
    max-width: var(--container-2xl);
    margin: 0 auto;
}

/* Logo */
.site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    transition: transform var(--transition-base);
}

.site-logo:hover {
    transform: scale(1.02);
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--text-2xl);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: logoShine 3s infinite;
}

@keyframes logoShine {
    0% { left: -100%; }
    50%, 100% { left: 100%; }
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--dark);
    line-height: var(--leading-tight);
    transition: color var(--transition-base);
}

.site-header.transparent .logo-name {
    color: var(--white);
}

.site-header.scrolled .logo-name {
    color: var(--primary);
}

.logo-tagline {
    font-size: var(--text-xs);
    color: var(--gray);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: color var(--transition-base);
}

.site-header.transparent .logo-tagline {
    color: rgba(255, 255, 255, 0.8);
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--dark);
    text-decoration: none;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
}

.site-header.transparent .nav-link {
    color: var(--white);
}

.site-header.scrolled .nav-link {
    color: var(--dark);
}

.nav-link:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.site-header.transparent .nav-link:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
}

.nav-link.active {
    background: var(--primary);
    color: var(--white);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: var(--radius-full);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    width: 48px;
    height: 48px;
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: calc(var(--z-modal) + 1);
}

.hamburger {
    width: 24px;
    height: 2px;
    background: var(--dark);
    position: relative;
    transition: all var(--transition-base);
}

.site-header.transparent .hamburger {
    background: var(--white);
}

.site-header.scrolled .hamburger {
    background: var(--dark);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: inherit;
    transition: all var(--transition-base);
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

.mobile-menu-toggle.active .hamburger {
    background: transparent;
}

.mobile-menu-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
    background: var(--dark);
}

.mobile-menu-toggle.active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
    background: var(--dark);
}

/* Mobile Overlay */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-modal-backdrop);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Mobile Slide Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 400px;
    height: 100%;
    background: var(--white);
    z-index: var(--z-modal);
    transition: right var(--transition-slower) cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mobile-menu-close {
    width: 40px;
    height: 40px;
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark);
    transition: all var(--transition-base);
}

.mobile-menu-close:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.mobile-menu-body {
    padding: var(--space-6);
}

.mobile-nav-links {
    list-style: none;
    margin-bottom: var(--space-8);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    color: var(--dark);
    text-decoration: none;
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.mobile-nav-link:hover {
    background: var(--primary-bg);
    color: var(--primary);
    transform: translateX(8px);
}

.mobile-nav-link i {
    width: 24px;
    text-align: center;
    color: var(--primary);
}

.mobile-menu-divider {
    height: 1px;
    background: var(--gray-200);
    margin: var(--space-6) 0;
}

.mobile-menu-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.mobile-menu-actions .btn {
    width: 100%;
    justify-content: center;
}

/* ============================================
   6. Hero Sections
   ============================================ */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

.floating-leaf {
    position: absolute;
    font-size: var(--text-3xl);
    color: rgba(255, 255, 255, 0.2);
    animation: float 6s ease-in-out infinite;
}

.leaf-1 { top: 20%; left: 10%; animation-delay: 0s; }
.leaf-2 { top: 40%; right: 15%; animation-delay: 1s; }
.leaf-3 { bottom: 30%; left: 20%; animation-delay: 2s; }
.leaf-4 { bottom: 20%; right: 10%; animation-delay: 3s; }

.floating-circle {
    position: absolute;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
}

.circle-1 { width: 300px; height: 300px; top: -100px; right: -100px; }
.circle-2 { width: 200px; height: 200px; bottom: 10%; left: -50px; }
.circle-3 { width: 150px; height: 150px; top: 40%; right: 10%; }

.hero-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: calc(var(--header-height) + var(--space-12)) var(--space-6) var(--space-12);
}

.hero-text {
    max-width: 700px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-5);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    color: var(--white);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    margin-bottom: var(--space-6);
}

.hero-badge i {
    color: var(--accent);
}

.hero-title {
    font-family: var(--font-display);
    font-size: var(--text-6xl);
    font-weight: var(--font-bold);
    color: var(--white);
    line-height: var(--leading-tight);
    margin-bottom: var(--space-6);
}

.hero-description {
    font-size: var(--text-xl);
    color: rgba(255, 255, 255, 0.9);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-8);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
}

.hero-stat {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.stat-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
    color: var(--white);
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--white);
    line-height: var(--leading-tight);
}

.stat-label {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   7. Card Components
   ============================================ */
.card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-image {
    position: relative;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slower);
}

.card:hover .card-image img {
    transform: scale(1.08);
}

.card-body {
    padding: var(--space-6);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--dark);
    margin-bottom: var(--space-3);
}

.card-title a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

.card-title a:hover {
    color: var(--primary);
}

.card-text {
    font-size: var(--text-base);
    color: var(--gray);
    line-height: var(--leading-relaxed);
}

/* Campaign Card */
.campaign-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.campaign-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.campaign-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.campaign-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slower);
}

.campaign-card:hover .campaign-image img {
    transform: scale(1.08);
}

.campaign-badge {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    padding: var(--space-2) var(--space-4);
    background: var(--primary);
    color: var(--white);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.campaign-content {
    padding: var(--space-6);
}

.campaign-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--dark);
    margin-bottom: var(--space-3);
    line-height: var(--leading-snug);
}

.campaign-title a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

.campaign-title a:hover {
    color: var(--primary);
}

.campaign-description {
    font-size: var(--text-sm);
    color: var(--gray);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-5);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.campaign-progress {
    margin-bottom: var(--space-4);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2);
}

.progress-label {
    font-size: var(--text-sm);
    color: var(--gray);
}

.progress-amount {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--primary);
}

.progress-bar-wrapper {
    height: 8px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width 1s ease;
}

.campaign-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-4);
    border-top: 1px solid var(--gray-200);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--gray);
}

.meta-item i {
    color: var(--primary);
}

/* Feature Card */
.feature-card {
    background: var(--white);
    padding: var(--space-10) var(--space-8);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-6);
    background: var(--primary-bg);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-3xl);
    color: var(--primary);
    transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
    background: var(--gradient-primary);
    color: var(--white);
    transform: scale(1.1);
}

.feature-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--dark);
    margin-bottom: var(--space-3);
}

.feature-description {
    font-size: var(--text-base);
    color: var(--gray);
    line-height: var(--leading-relaxed);
}

/* ============================================
   8. Button System
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    text-decoration: none;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(255,255,255,0.2) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn:hover::before {
    opacity: 1;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--white);
}

.btn-secondary:hover {
    background: var(--secondary-dark);
    transform: translateY(-2px);
}

.btn-accent {
    background: var(--gradient-accent);
    color: var(--dark);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-accent);
}

.btn-outline {
    background: transparent;
    border-color: var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
}

.btn-outline-light {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--white);
}

.btn-outline-light:hover {
    background: var(--white);
    color: var(--primary);
    border-color: var(--white);
}

.btn-ghost {
    background: transparent;
    color: var(--dark);
}

.btn-ghost:hover {
    background: var(--gray-100);
}

.btn-white {
    background: var(--white);
    color: var(--primary);
}

.btn-white:hover {
    background: var(--gray-100);
    transform: translateY(-2px);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* ============================================
   9. Form Elements
   ============================================ */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--dark);
    margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-4);
    background: var(--gray-50);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--dark);
    transition: all var(--transition-base);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--gray-400);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    background: var(--white);
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(46, 125, 50, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-input.error,
.form-textarea.error {
    border-color: var(--error);
    background: var(--error-light);
}

.form-error {
    font-size: var(--text-sm);
    color: var(--error);
    margin-top: var(--space-1);
}

.form-hint {
    font-size: var(--text-sm);
    color: var(--gray);
    margin-top: var(--space-1);
}

.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.form-check input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.form-check label {
    font-size: var(--text-sm);
    color: var(--gray);
}

/* Input with Icon */
.input-group {
    position: relative;
}

.input-icon {
    position: absolute;
    top: 50%;
    left: var(--space-4);
    transform: translateY(-50%);
    color: var(--gray-400);
    pointer-events: none;
}

.input-group .form-input {
    padding-left: calc(var(--space-4) * 2 + 20px);
}

/* ============================================
   10. Progress & Stats
   ============================================ */
.stats-section {
    padding: var(--space-20) 0;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-10);
    position: relative;
    z-index: 1;
}

.stat-card {
    text-align: center;
    padding: var(--space-8);
}

.stat-card-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-5);
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    color: var(--white);
}

.stat-card-number {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    color: var(--white);
    line-height: var(--leading-tight);
    margin-bottom: var(--space-2);
}

.stat-card-label {
    font-size: var(--text-base);
    color: rgba(255, 255, 255, 0.9);
}

/* ============================================
   11. Modal & Overlay
   ============================================ */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-modal-backdrop);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-modal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.modal-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--dark);
}

.modal-close {
    width: 36px;
    height: 36px;
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray);
    transition: all var(--transition-base);
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--dark);
}

.modal-body {
    padding: var(--space-6);
}

.modal-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* ============================================
   12. Footer Styles
   ============================================ */
.site-footer {
    background: var(--dark);
    color: var(--white);
    position: relative;
}

.footer-wave {
    position: absolute;
    top: -60px;
    left: 0;
    right: 0;
    color: var(--dark);
}

.footer-wave svg {
    display: block;
    width: 100%;
    height: 60px;
}

.newsletter-section {
    padding: var(--space-16) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.newsletter-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-10);
    flex-wrap: wrap;
}

.newsletter-content {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.newsletter-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    color: var(--white);
}

.newsletter-text h3 {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--white);
    margin-bottom: var(--space-1);
}

.newsletter-text p {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

.newsletter-form {
    flex: 1;
    max-width: 500px;
}

.newsletter-input-group {
    display: flex;
    gap: var(--space-3);
}

.newsletter-input-group input {
    flex: 1;
    padding: var(--space-4) var(--space-5);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--white);
    font-size: var(--text-base);
}

.newsletter-input-group input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-input-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.newsletter-privacy {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.5);
    margin-top: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.footer-main {
    padding: var(--space-16) 0 var(--space-10);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-10);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    margin-bottom: var(--space-5);
}

.footer-logo .logo-icon {
    background: var(--gradient-primary);
}

.footer-logo .logo-name {
    color: var(--white);
    font-size: var(--text-xl);
}

.footer-logo .logo-tagline {
    color: rgba(255, 255, 255, 0.6);
}

.footer-description {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.7);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-6);
}

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--text-lg);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--primary);
    transform: translateY(-4px);
}

.footer-title {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--white);
    margin-bottom: var(--space-6);
}

.footer-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--space-3);
}

.footer-links a {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: all var(--transition-base);
}

.footer-links a:hover {
    color: var(--white);
    padding-left: var(--space-2);
}

.footer-links a i {
    font-size: var(--text-xs);
    color: var(--primary);
}

.contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.contact-list li {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.contact-icon {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.contact-text {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.7);
    line-height: var(--leading-relaxed);
}

.contact-text a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-base);
}

.contact-text a:hover {
    color: var(--white);
}

.footer-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-6);
}

.badge-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.8);
}

.badge-item i {
    color: var(--primary);
}

.footer-bottom {
    padding: var(--space-6) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.copyright {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}

.footer-bottom-links {
    display: flex;
    gap: var(--space-6);
}

.footer-bottom-links a {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer-bottom-links a:hover {
    color: var(--white);
}

/* ============================================
   13. Utility Classes
   ============================================ */
/* Text Alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Text Colors */
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-accent { color: var(--accent); }
.text-muted { color: var(--gray); }
.text-white { color: var(--white); }
.text-dark { color: var(--dark); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error { color: var(--error); }

/* Background Colors */
.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--secondary); }
.bg-accent { background-color: var(--accent); }
.bg-light { background-color: var(--light); }
.bg-dark { background-color: var(--dark); }
.bg-white { background-color: var(--white); }
.bg-gradient { background: var(--gradient-primary); }
.bg-gradient-earth { background: var(--gradient-earth); }

/* Spacing */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* Display */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }

/* Gap */
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Width */
.w-full { width: 100%; }
.w-auto { width: auto; }
.max-w-sm { max-width: var(--container-sm); }
.max-w-md { max-width: var(--container-md); }
.max-w-lg { max-width: var(--container-lg); }

/* Border Radius */
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow */
.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-none { box-shadow: none; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

/* ============================================
   14. Animations & Transitions
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Animation Classes */
.animate-fade-in { animation: fadeIn 0.5s ease forwards; }
.animate-fade-in-up { animation: fadeInUp 0.5s ease forwards; }
.animate-fade-in-down { animation: fadeInDown 0.5s ease forwards; }
.animate-scale-in { animation: scaleIn 0.5s ease forwards; }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-spin { animation: spin 1s linear infinite; }

/* Scroll Animation Classes */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll.delay-1 { transition-delay: 0.1s; }
.animate-on-scroll.delay-2 { transition-delay: 0.2s; }
.animate-on-scroll.delay-3 { transition-delay: 0.3s; }
.animate-on-scroll.delay-4 { transition-delay: 0.4s; }
.animate-on-scroll.delay-5 { transition-delay: 0.5s; }

/* Loading States */
.skeleton {
    background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-50) 50%, var(--gray-100) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

/* ============================================
   15. Responsive Breakpoints
   ============================================ */
@media (max-width: 1280px) {
    .container { max-width: var(--container-xl); }
    
    .hero-title { font-size: var(--text-5xl); }
    
    .section-title { font-size: var(--text-4xl); }
    
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1024px) {
    .main-nav { display: none; }
    
    .mobile-menu-toggle { display: flex; }
    
    .hero-title { font-size: var(--text-4xl); }
    
    .hero-stats { flex-direction: column; gap: var(--space-5); }
    
    .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
    
    .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }
    
    .section { padding: var(--space-16) 0; }
    
    .section-title { font-size: var(--text-3xl); }
    
    .hero-section { min-height: auto; padding: var(--space-32) 0 var(--space-16); }
    
    .hero-title { font-size: var(--text-3xl); }
    
    .hero-description { font-size: var(--text-base); }
    
    .hero-actions { flex-direction: column; }
    
    .hero-actions .btn { width: 100%; }
    
    .container { padding: 0 var(--space-4); }
    
    .grid-cols-2 { grid-template-columns: 1fr; }
    .grid-cols-3 { grid-template-columns: 1fr; }
    .grid-cols-4 { grid-template-columns: 1fr; }
    
    .features-grid { grid-template-columns: 1fr; }
    
    .stats-grid { grid-template-columns: 1fr; gap: var(--space-6); }
    
    .stat-card-number { font-size: var(--text-3xl); }
    
    .newsletter-wrapper { flex-direction: column; text-align: center; }
    
    .newsletter-content { flex-direction: column; }
    
    .newsletter-form { max-width: 100%; }
    
    .newsletter-input-group { flex-direction: column; }
    
    .footer-grid { grid-template-columns: 1fr; text-align: center; }
    
    .footer-social { justify-content: center; }
    
    .footer-links a { justify-content: center; }
    
    .contact-list li { justify-content: center; }
    
    .footer-badges { justify-content: center; }
    
    .footer-bottom-content { flex-direction: column; text-align: center; }
    
    .mobile-menu { max-width: 100%; }
    
    .logo-text { display: none; }
    
    h1 { font-size: var(--text-3xl); }
    h2 { font-size: var(--text-2xl); }
    h3 { font-size: var(--text-xl); }
}

@media (max-width: 576px) {
    .section { padding: var(--space-12) 0; }
    
    .section-title { font-size: var(--text-2xl); }
    
    .hero-title { font-size: var(--text-2xl); }
    
    .btn-lg { padding: var(--space-3) var(--space-6); font-size: var(--text-sm); }
    
    .stat-card { padding: var(--space-6) var(--space-4); }
    
    .stat-card-number { font-size: var(--text-2xl); }
    
    .feature-card { padding: var(--space-8) var(--space-6); }
    
    .campaign-image { height: 180px; }
}

/* Print Styles */
@media print {
    * {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
    }
    
    a, a:visited { text-decoration: underline; }
    
    img { max-width: 100% !important; }
    
    @page { margin: 0.5cm; }
}