/* ===================================
   WindHarvest.tech - Liquid Glass Design
   Glassmorphism with fluid animations
   =================================== */

:root {
    /* Colors - Wind Energy Theme */
    --primary-blue: #0EA5E9;
    --primary-green: #10B981;
    --dark-blue: #0C4A6E;
    --light-blue: #E0F2FE;
    --emerald: #059669;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --white: #FFFFFF;
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius - Only two values allowed */
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #0C4A6E 0%, #111827 100%);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navigation - Glass Effect */
.nav-glass {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(17, 24, 39, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s var(--transition-smooth);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--white);
    font-weight: 600;
    font-size: 1.25rem;
    transition: transform 0.3s var(--transition-bounce);
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-2xl);
    transition: all 0.3s var(--transition-smooth);
    position: relative;
}

.nav-link:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    color: var(--white);
    background: rgba(14, 165, 233, 0.2);
}

.nav-link-cta {
    color: var(--white);
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-2xl);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.nav-link-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: var(--radius-full);
    transition: all 0.3s var(--transition-smooth);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
    opacity: 0.3;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 1s var(--transition-smooth);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: var(--radius-2xl);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(14, 165, 233, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: var(--radius-2xl);
    text-decoration: none;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s var(--transition-smooth);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.stat-item {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 0.25rem;
}

/* Floating Cards */
.hero-visual {
    position: relative;
    height: 500px;
    animation: fadeInRight 1s var(--transition-smooth);
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px) saturate(180%);
    padding: var(--spacing-md);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    animation: float 6s ease-in-out infinite;
}

.card-1 { top: 0; left: 0; animation-delay: 0s; }
.card-2 { top: 50%; right: 0; animation-delay: 2s; }
.card-3 { bottom: 0; left: 20%; animation-delay: 4s; }

.card-icon {
    width: 48px;
    height: 48px;
    background: rgba(14, 165, 233, 0.2);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.card-content {
    color: var(--white);
}

.card-title {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-bottom: 0.25rem;
}

.card-value {
    font-size: 1.25rem;
    font-weight: 700;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Sections */
.features, .platform, .cta-section,
.solution-section, .tech-overview, .tech-detail,
.security-section, .stack-section,
.mission-section, .values-section, .team-section, .impact-section,
.contact-section {
    padding: var(--spacing-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xl);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s var(--transition-smooth);
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.feature-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s var(--transition-smooth);
}

.feature-link:hover {
    gap: 0.75rem;
}

/* Platform Section */
.platform {
    background: rgba(255, 255, 255, 0.02);
}

.platform-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.platform-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.platform-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.platform-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.platform-feature {
    display: flex;
    gap: var(--spacing-md);
    align-items: start;
}

.platform-feature svg {
    flex-shrink: 0;
    margin-top: 4px;
}

.platform-feature-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.platform-feature-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.platform-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.platform-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.platform-card-title {
    font-weight: 600;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(16, 185, 129, 0.2);
    color: var(--primary-green);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-green);
    border-radius: var(--radius-full);
    animation: pulse 2s ease-in-out infinite;
}

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

.platform-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.metric {
    text-align: center;
}

.metric-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0.25rem;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.metric-change {
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.metric-change.positive {
    color: var(--primary-green);
}

.platform-chart {
    height: 100px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-sm);
}

.chart-svg {
    width: 100%;
    height: 100%;
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-2xl) 0;
}

.cta-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px) saturate(180%);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Footer */
.footer {
    background: rgba(0, 0, 0, 0.3);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.footer-title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s var(--transition-smooth);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* Page Hero (for other pages) */
.page-hero {
    padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    text-align: center;
}

.page-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.page-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-container,
    .platform-content,
    .solution-content {
        grid-template-columns: 1fr;
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}