/* ============================================
   BanglaKompost - CSS Styles
   Mobile-First Responsive Design
   ============================================ */

/* CSS Variables */
:root {
    /* Primary Colors */
    --primary-green: #2E7D32;
    --primary-green-dark: #1B5E20;
    --primary-green-light: #4CAF50;
    
    /* Secondary Colors */
    --earth-brown: #6D4C41;
    --earth-brown-dark: #4E342E;
    --earth-brown-light: #8D6E63;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --off-white: #F5F5F5;
    --light-gray: #E0E0E0;
    --gray: #9E9E9E;
    --dark-gray: #424242;
    --black: #212121;
    
    /* Accent Colors */
    --accent-yellow: #FFC107;
    --accent-orange: #FF9800;
    --error-red: #F44336;
    --success-green: #4CAF50;
    
    /* SDG Colors */
    --sdg-11: #F99D26;
    --sdg-12: #CF8D2A;
    --sdg-13: #48773E;
    
    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Roboto', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    color: var(--black);
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ============================================
   Utility Classes
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.highlight {
    color: var(--primary-green);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--primary-green-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
}

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

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-tag {
    display: inline-block;
    background: rgba(46, 125, 50, 0.1);
    color: var(--primary-green);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.section-description {
    color: var(--dark-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    padding: 0.75rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--white);
    transition: var(--transition-fast);
}

.navbar.scrolled .logo {
    color: var(--primary-green);
}

.logo i {
    font-size: 1.75rem;
}

.nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    color: var(--white);
    font-size: 1.5rem;
    z-index: 1001;
}

.navbar.scrolled .nav-toggle {
    color: var(--primary-green);
}

.nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: var(--white);
    padding: 5rem var(--spacing-lg) var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-xl);
}

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

.nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 1.125rem;
    color: var(--dark-gray);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-green);
    background: rgba(46, 125, 50, 0.1);
}

.btn-nav {
    background: var(--primary-green);
    color: var(--white) !important;
    text-align: center;
    margin-top: var(--spacing-sm);
}

.btn-nav:hover {
    background: var(--primary-green-dark);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-green-dark) 0%, var(--primary-green) 50%, var(--earth-brown) 100%);
    padding: 6rem var(--spacing-sm) var(--spacing-xl);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: 50px 50px;
    opacity: 0.5;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero-title .highlight {
    color: var(--accent-yellow);
}

.hero-subtitle {
    font-size: 1.125rem;
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    opacity: 0.95;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.stat {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-yellow);
}

.stat-label {
    font-size: 0.75rem;
    opacity: 0.9;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--white);
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

/* ============================================
   Problem Section
   ============================================ */
.problem {
    padding: var(--spacing-xxl) 0;
    background: var(--off-white);
}

.problem-content {
    display: grid;
    gap: var(--spacing-lg);
}

.problem-image {
    order: -1;
}

.image-placeholder {
    background: linear-gradient(135deg, var(--earth-brown-light) 0%, var(--earth-brown) 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xxl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    min-height: 250px;
}

.image-placeholder i {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.8;
}

.image-placeholder span {
    font-family: var(--font-heading);
    font-weight: 500;
    opacity: 0.9;
}

.problem-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.problem-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.problem-card i {
    font-size: 2rem;
    color: var(--error-red);
    margin-bottom: var(--spacing-sm);
}

.problem-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--black);
}

.problem-card p {
    color: var(--dark-gray);
    font-size: 0.95rem;
}

/* ============================================
   Solution Section
   ============================================ */
.solution {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
}

.solution-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
}

.step-card {
    background: var(--off-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    position: relative;
    width: 100%;
    max-width: 350px;
    transition: var(--transition-normal);
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.step-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-light) 100%);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.step-icon i {
    font-size: 2rem;
    color: var(--white);
}

.step-number {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-green);
    opacity: 0.2;
}

.step-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-green-dark);
}

.step-card p {
    color: var(--dark-gray);
}

.step-arrow {
    color: var(--primary-green);
    font-size: 1.5rem;
    transform: rotate(90deg);
}

/* ============================================
   How It Works Section
   ============================================ */
.how-it-works {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary-green-dark) 0%, var(--primary-green) 100%);
    color: var(--white);
}

.how-it-works .section-tag {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.how-it-works .section-header h2 {
    color: var(--white);
}

.process-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}

.process-step {
    display: flex;
    gap: var(--spacing-md);
    position: relative;
}

.process-icon {
    width: 60px;
    height: 60px;
    min-width: 60px;
    background: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.process-icon i {
    font-size: 1.5rem;
    color: var(--primary-green);
}

.process-content {
    flex: 1;
    padding-bottom: var(--spacing-sm);
}

.process-content h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.process-content p {
    opacity: 0.9;
    font-size: 0.95rem;
}

/* ============================================
   Impact Section
   ============================================ */
.impact {
    padding: var(--spacing-xxl) 0;
    background: var(--off-white);
}

.impact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.impact-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.impact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.impact-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-light) 100%);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.impact-icon i {
    font-size: 1.75rem;
    color: var(--white);
}

.impact-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--black);
}

.impact-card p {
    color: var(--dark-gray);
    font-size: 0.95rem;
}

/* SDG Section */
.sdg-section {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--light-gray);
}

.sdg-section h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
}

.sdg-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
}

.sdg-badge {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--white);
    text-align: center;
}

.sdg-badge span {
    display: block;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
}

.sdg-badge small {
    font-size: 0.75rem;
    opacity: 0.9;
}

.sdg-11 { background: var(--sdg-11); }
.sdg-12 { background: var(--sdg-12); }
.sdg-13 { background: var(--sdg-13); }


.form-success {
    display: none;
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--off-white);
    border-radius: var(--radius-lg);
}

.form-success.show {
    display: block;
    animation: fadeInUp 0.5s ease;
}

.form-success i {
    font-size: 4rem;
    color: var(--success-green);
    margin-bottom: var(--spacing-md);
}

.form-success h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--primary-green-dark);
    margin-bottom: var(--spacing-sm);
}

.form-success p {
    color: var(--dark-gray);
}

/* ============================================
   Pricing Section
   ============================================ */
.pricing {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.pricing-card {
    background: var(--off-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    position: relative;
    border: 2px solid transparent;
}

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

.pricing-card.featured {
    background: linear-gradient(135deg, rgba(46, 125, 50, 0.05) 0%, rgba(46, 125, 50, 0.02) 100%);
    border-color: var(--primary-green);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-green);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-xl);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.875rem;
}

.pricing-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-light) 100%);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.pricing-icon i {
    font-size: 2rem;
    color: var(--white);
}

.pricing-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--black);
}

.pricing-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.currency {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.5rem;
    color: var(--primary-green);
}

.price {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 3rem;
    color: var(--primary-green-dark);
}

.unit {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--gray);
}

.pricing-features {
    text-align: left;
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--dark-gray);
    font-size: 0.95rem;
}

.pricing-features i {
    color: var(--success-green);
    flex-shrink: 0;
}

.pricing-note {
    background: rgba(46, 125, 50, 0.1);
    border: 2px solid var(--primary-green);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.pricing-note i {
    color: var(--primary-green);
    margin-top: 2px;
    flex-shrink: 0;
}

.pricing-note p {
    color: var(--dark-gray);
    font-size: 0.95rem;
}

/* ============================================
   About Section
   ============================================ */
.about {
    padding: var(--spacing-xxl) 0;
    background: var(--off-white);
}

.about-content {
    display: grid;
    gap: var(--spacing-xl);
}

.about-text {
    text-align: center;
}

.mission-statement {
    font-size: 1.25rem;
    color: var(--primary-green-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-text p {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
}

.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

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

.badge span {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--dark-gray);
}

/* Team Section */
.team-section {
    text-align: center;
}

.team-section h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--black);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.team-member {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.member-avatar {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-light) 100%);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
}

.member-avatar i {
    font-size: 2rem;
    color: var(--white);
}

.team-member h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--black);
}

.team-member p {
    color: var(--gray);
    font-size: 0.875rem;
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
    padding: var(--spacing-xxl) var(--spacing-sm);
    background: linear-gradient(135deg, var(--earth-brown-dark) 0%, var(--earth-brown) 100%);
    text-align: center;
    color: var(--white);
}

.cta h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.cta p {
    font-size: 1.125rem;
    opacity: 0.95;
    margin-bottom: var(--spacing-lg);
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    justify-content: center;
    align-items: center;
}

.cta .btn-primary {
    background: var(--primary-green);
}

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

.cta .btn-secondary:hover {
    background: var(--white);
    color: var(--earth-brown);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--black);
    color: var(--white);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: var(--gray);
    margin-bottom: var(--spacing-md);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary-green);
    transform: translateY(-2px);
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: var(--gray);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-green-light);
    padding-left: var(--spacing-xs);
}

.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray);
}

.footer-contact i {
    color: var(--primary-green-light);
    width: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--gray);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-green);
    color: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-normal);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-green-dark);
    transform: translateY(-4px);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ============================================
   Tablet Styles (768px and up)
   ============================================ */
@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .section-header h2 {
        font-size: 2.5rem;
    }
    
    /* Navigation */
    .nav-toggle {
        display: none;
    }
    
    .nav-menu {
        position: static;
        width: auto;
        max-width: none;
        height: auto;
        background: transparent;
        padding: 0;
        flex-direction: row;
        gap: var(--spacing-xs);
        box-shadow: none;
    }
    
    .nav-link {
        font-size: 0.95rem;
        padding: 0.5rem 0.75rem;
        color: var(--white);
    }
    
    .navbar.scrolled .nav-link {
        color: var(--dark-gray);
    }
    
    .nav-link:hover {
        background: rgba(255, 255, 255, 0.2);
    }
    
    .navbar.scrolled .nav-link:hover {
        background: rgba(46, 125, 50, 0.1);
        color: var(--primary-green);
    }
    
    .btn-nav {
        margin-top: 0;
        margin-left: var(--spacing-sm);
    }
    
    /* Hero */
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-buttons {
        flex-direction: row;
        justify-content: center;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.875rem;
    }
    
    /* Problem */
    .problem-content {
        grid-template-columns: 1fr 1fr;
        align-items: center;
    }
    
    .problem-image {
        order: 0;
    }
    
    /* Solution */
    .solution-steps {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-md);
    }
    
    .step-arrow {
        transform: rotate(0);
        align-self: center;
    }
    
    .step-card {
        max-width: 280px;
    }
    
    /* Impact */
    .impact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Pricing */
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Team */
    .team-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    /* CTA */
    .cta-buttons {
        flex-direction: row;
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

/* ============================================
   Desktop Styles (1024px and up)
   ============================================ */
@media (min-width: 1024px) {
    .section-header h2 {
        font-size: 3rem;
    }
    
    /* Hero */
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-stats {
        max-width: 600px;
        margin: 0 auto;
        gap: var(--spacing-lg);
    }
    
    .stat {
        padding: var(--spacing-lg);
    }
    
    /* Solution */
    .step-card {
        max-width: 320px;
        padding: var(--spacing-xl);
    }
    
    /* Impact */
    .impact-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    /* About */
    .about-content {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }
    
    .about-text {
        text-align: left;
    }
    
    .trust-badges {
        justify-content: flex-start;
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* CTA */
    .cta h2 {
        font-size: 2.5rem;
    }
}

/* ============================================
   Large Desktop Styles (1200px and up)
   ============================================ */
@media (min-width: 1200px) {
    .hero-title {
        font-size: 4rem;
    }
    
    .solution-steps {
        gap: var(--spacing-lg);
    }
    
    .step-card {
        max-width: 350px;
    }
}

/* ============================================
   Accessibility & Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus Styles for Accessibility */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--primary-green);
    outline-offset: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-green);
    color: var(--white);
    padding: 8px;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}