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

:root {
    /* Color Palette */
    --primary-blue: #3b82f6;
    --secondary-blue: #2563eb;
    --light-blue: #dbeafe;
    --dark-blue: #1e40af;
    --accent-blue: #3b82f6;
    --accent-orange: #f97316;
    --accent-yellow: #fbbf24;
    
    /* Neutrals */
    --white: #ffffff;
    --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;
    
    /* Typography */
    --font-primary: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --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;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--gray-50);
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.03) 0%, rgba(59, 130, 246, 0.03) 100%);
    pointer-events: none;
    z-index: 0;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Glass Morphism Base */
.glass-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
}

.glass-dark {
    background: rgba(31, 41, 55, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.nav {
    padding: var(--space-3) 0;
    transition: all var(--transition-normal);
}

.header.scrolled .nav {
    padding: var(--space-2) 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

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

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-blue);
}

.nav-links {
    display: flex;
    gap: var(--space-8);
}

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

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

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    transition: all var(--transition-fast);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: url('images/hero-bg-blur.jpg') center/cover;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.7) 0%, rgba(59, 130, 246, 0.5) 100%);
    z-index: 1;
}

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

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(34, 197, 94, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
    animation: float 10s ease-in-out infinite;
}

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

.hero-container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

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

.hero-title-main {
    display: block;
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-sub {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 300;
    color: var(--gray-600);
    margin-bottom: var(--space-6);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--space-10);
    line-height: 1.8;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-10);
}

.stat-item {
    text-align: center;
    padding: var(--space-6);
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.stat-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    font-weight: 500;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

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

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

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

/* Hero Visual */
.hero-visual {
    animation: fadeInRight 1s ease-out 0.3s both;
}

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

.energy-visualization {
    position: relative;
}

.energy-chart {
    width: 100%;
    height: 400px;
    filter: drop-shadow(var(--shadow-lg));
}

.chart-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    fill: var(--gray-700);
}

.turbine-blades {
    animation: rotate 3s linear infinite;
}

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

.energy-flow {
    animation: dash 2s linear infinite;
}

@keyframes dash {
    to {
        stroke-dashoffset: -20;
    }
}

/* Market Overview Section */
.market-overview {
    padding: var(--space-24) 0;
    position: relative;
    background: url('images/section-bg-1.jpg') center/cover fixed;
}

.market-overview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
    position: relative;
    z-index: 1;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.market-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

.market-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.5);
    position: relative;
    overflow: hidden;
}

.market-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.market-card:hover::before {
    transform: scaleX(1);
}

.market-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
    background: rgba(255, 255, 255, 0.95);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-6);
}

.card-icon svg {
    width: 30px;
    height: 30px;
    color: var(--white);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

.card-value {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-3);
}

.card-description {
    color: var(--gray-600);
    margin-bottom: var(--space-6);
}

.card-chart {
    height: 200px;
}

.card-chart canvas {
    width: 100% !important;
    height: 100% !important;
}

/* Technology Sections */
.technology-sections {
    padding: var(--space-24) 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
}

.tech-nav {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-16);
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-2);
    box-shadow: var(--shadow-md);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.tech-tab {
    padding: var(--space-3) var(--space-6);
    border: none;
    background: transparent;
    color: var(--gray-600);
    font-weight: 500;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tech-tab.active,
.tech-tab:hover {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
}

.tech-content {
    display: none;
}

.tech-content.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.tech-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.tech-info {
    animation: slideInLeft 0.6s ease-out;
}

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

.tech-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-6);
}

.tech-description {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

.tech-features {
    list-style: none;
    margin-bottom: var(--space-8);
}

.tech-features li {
    display: flex;
    align-items: center;
    margin-bottom: var(--space-4);
    padding: var(--space-3);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.tech-features li::before {
    content: '✓';
    display: inline-block;
    width: 20px;
    height: 20px;
    background: var(--primary-blue);
    color: var(--white);
    text-align: center;
    line-height: 20px;
    border-radius: 50%;
    margin-right: var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: bold;
}

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

.stat {
    text-align: center;
}

.stat .stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-blue);
    display: block;
    margin-bottom: var(--space-2);
}

.stat .stat-label {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
}

.tech-visual {
    animation: slideInRight 0.6s ease-out;
}

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

.tech-visual canvas {
    width: 100% !important;
    height: 400px !important;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

/* Investment Section */
.investment-section {
    padding: var(--space-24) 0;
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    color: var(--white);
}

.investment-section .section-title {
    color: var(--white);
}

.investment-section .section-subtitle {
    color: var(--gray-300);
}

.investment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-16);
}

.investment-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    backdrop-filter: blur(20px);
    transition: all var(--transition-normal);
}

.investment-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-8px);
}

.investment-card.featured {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--primary-blue);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.3);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
}

.opportunity-badge {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.investment-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.metric {
    text-align: center;
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
}

.metric-value {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--space-1);
}

.metric-label {
    font-size: var(--font-size-xs);
    color: var(--gray-400);
}

.investment-chart {
    height: 150px;
    margin-bottom: var(--space-6);
}

.investment-chart canvas {
    width: 100% !important;
    height: 100% !important;
}

.investment-cta {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    border-radius: var(--radius-2xl);
    padding: var(--space-16);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--space-4);
}

.cta-description {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

/* Content Navigation */
.content-navigation {
    padding: var(--space-24) 0;
    position: relative;
    background: url('images/section-bg-2.jpg') center/cover fixed;
}

.content-navigation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(249, 250, 251, 0.95);
    backdrop-filter: blur(10px);
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.content-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-xl);
    text-decoration: none;
    color: inherit;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.content-card.glass-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.card-image {
    position: relative;
    width: 100%;
    height: 180px;
    overflow: hidden;
    flex-shrink: 0;
}

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

.card-image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.4) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.content-card:hover .card-image img {
    transform: scale(1.1);
}

.content-card:hover .card-image-overlay {
    opacity: 1;
}

.card-content {
    padding: var(--space-6);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.content-card:hover::before {
    transform: scaleX(1);
}

.content-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
    background: rgba(255, 255, 255, 1);
}

.content-card .card-icon {
    width: 50px;
    height: 50px;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.content-card .card-icon svg {
    width: 24px;
    height: 24px;
    color: var(--white);
}

.content-card .card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-3);
}

.content-card .card-description {
    color: var(--gray-600);
    margin-bottom: var(--space-4);
    flex-grow: 1;
}

.card-arrow {
    font-size: var(--font-size-lg);
    color: var(--primary-blue);
    font-weight: bold;
    transition: transform var(--transition-fast);
}

.content-card:hover .card-arrow {
    transform: translateX(4px);
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--space-16) 0 var(--space-8) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

.footer-section {
    grid-column: 1 / 2;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.footer-logo .logo-text {
    color: var(--white);
}

.footer-description {
    color: var(--gray-400);
    line-height: 1.7;
}

.footer-links {
    display: contents;
}

.link-group {
    
}

.link-title {
    color: var(--white);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.link {
    display: block;
    color: var(--gray-400);
    text-decoration: none;
    margin-bottom: var(--space-2);
    transition: color var(--transition-fast);
}

.link:hover {
    color: var(--primary-blue);
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--gray-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    color: var(--gray-500);
}

.footer-stats {
    display: flex;
    gap: var(--space-6);
    color: var(--gray-500);
    font-size: var(--font-size-sm);
}

/* Template Specific Styles */
.nav-logo a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
}

.nav-dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    background: none;
    border: none;
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    padding: 0;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    min-width: 200px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-2);
    margin-top: var(--space-2);
    z-index: 100;
}

.nav-dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content a {
    display: block;
    padding: var(--space-2) var(--space-4);
    color: var(--gray-700);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.dropdown-content a:hover {
    background: var(--light-blue);
    color: var(--primary-blue);
}

/* Breadcrumb Navigation */
.breadcrumb {
    padding: var(--space-4) 0;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    margin-top: 80px;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.breadcrumb-item {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
}

.breadcrumb-item a {
    color: var(--gray-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--primary-blue);
}

.breadcrumb-item::after {
    content: '/';
    margin-left: var(--space-2);
    color: var(--gray-400);
}

.breadcrumb-item:last-child::after {
    display: none;
}

.breadcrumb-item.active {
    color: var(--gray-900);
    font-weight: 500;
}

/* Page Hero Section */
.page-hero {
    position: relative;
    padding: var(--space-24) 0;
    background: var(--gray-900);
    overflow: hidden;
}

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

.page-hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.page-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.7) 0%, rgba(59, 130, 246, 0.5) 100%);
}

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

.page-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.page-subtitle {
    font-size: var(--font-size-xl);
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}

/* Content Sections */
.content-section {
    padding: var(--space-20) 0;
}

.content-body {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
    color: var(--gray-700);
}

.content-body h2 {
    font-size: var(--font-size-3xl);
    color: var(--gray-900);
    margin: var(--space-12) 0 var(--space-6) 0;
}

.content-body h3 {
    font-size: var(--font-size-2xl);
    color: var(--gray-800);
    margin: var(--space-8) 0 var(--space-4) 0;
}

.content-body p {
    margin-bottom: var(--space-6);
}

.content-body ul,
.content-body ol {
    margin-bottom: var(--space-6);
    padding-left: var(--space-8);
}

.content-body li {
    margin-bottom: var(--space-3);
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.info-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.info-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

/* CTA Section */
.cta-section {
    padding: var(--space-20) 0;
    background: url('images/section-bg-2.jpg') center/cover fixed;
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.cta-card {
    position: relative;
    z-index: 1;
    padding: var(--space-12);
    text-align: center;
    border-radius: var(--radius-2xl);
}

.cta-card.glass-dark {
    color: var(--white);
}

.cta-card .cta-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-4);
}

.cta-card .cta-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-8);
    opacity: 0.9;
}

/* Related Links */
.related-links {
    padding: var(--space-16) 0;
    background: var(--gray-50);
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.link-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-6);
    background: var(--white);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--gray-800);
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.link-card:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateX(4px);
}

.link-card .link-title {
    font-weight: 500;
}

.link-card .link-arrow {
    font-size: var(--font-size-xl);
    transition: transform var(--transition-fast);
}

.link-card:hover .link-arrow {
    transform: translateX(4px);
}

/* Mobile Menu */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
}

.mobile-menu-overlay.active {
    display: block;
}

.mobile-menu {
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    background: var(--white);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
    padding: var(--space-6);
}

.mobile-menu-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: none;
    border: none;
    font-size: var(--font-size-3xl);
    cursor: pointer;
}

.mobile-nav {
    margin-top: var(--space-12);
}

.mobile-nav-section {
    margin-bottom: var(--space-8);
}

.mobile-nav-title {
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    color: var(--gray-500);
    margin-bottom: var(--space-3);
}

.mobile-nav-link {
    display: block;
    padding: var(--space-3) 0;
    color: var(--gray-700);
    text-decoration: none;
    border-bottom: 1px solid var(--gray-100);
    transition: color var(--transition-fast);
}

.mobile-nav-link:hover {
    color: var(--primary-blue);
}

/* Footer Social Icons */
.footer-social {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--gray-400);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-12);
        text-align: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-6);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title-main {
        font-size: var(--font-size-4xl);
    }
    
    .hero-title-sub {
        font-size: var(--font-size-2xl);
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .tech-nav {
        flex-wrap: wrap;
        gap: var(--space-1);
    }
    
    .tech-tab {
        padding: var(--space-2) var(--space-4);
        font-size: var(--font-size-sm);
    }
    
    .market-grid,
    .investment-grid,
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .footer-stats {
        flex-direction: column;
        gap: var(--space-2);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-3);
    }
    
    .hero-title-main {
        font-size: var(--font-size-3xl);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .market-card,
    .investment-card,
    .content-card {
        padding: var(--space-6);
    }
    
    .btn {
        width: 100%;
    }
}

/* Animation Classes */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

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

/* Loading States */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--gray-300);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Chart Animations */
@keyframes chartFadeIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.chart-container {
    animation: chartFadeIn 0.8s ease-out;
    max-width: 600px;
    margin: 0 auto;
}

.chart-container canvas {
    max-height: 400px !important;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles */
.btn:focus,
.nav-link:focus,
.tech-tab:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .footer,
    .investment-cta {
        display: none;
    }
    
    .hero,
    .market-overview,
    .technology-sections,
    .content-navigation {
        page-break-inside: avoid;
    }
}

/* Article-specific styles */

/* Article Hero Section */
.article-hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--light-blue) 50%, var(--gray-50) 100%);
    overflow: hidden;
    margin-top: 80px;
}

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

.solar-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 15% 25%, rgba(251, 191, 36, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 70%, rgba(59, 130, 246, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 30% 80%, rgba(251, 191, 36, 0.1) 0%, transparent 30%);
    animation: solarFloat 15s ease-in-out infinite;
}

@keyframes solarFloat {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg);
        opacity: 0.8;
    }
    25% { 
        transform: translateY(-10px) rotate(1deg);
        opacity: 1;
    }
    50% { 
        transform: translateY(-15px) rotate(-1deg);
        opacity: 0.9;
    }
    75% { 
        transform: translateY(-5px) rotate(0.5deg);
        opacity: 1;
    }
}

.article-header {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
    font-size: var(--font-size-sm);
    color: var(--gray-600);
}

.breadcrumb a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.article-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.article-subtitle {
    font-size: var(--font-size-xl);
    color: var(--gray-600);
    margin-bottom: var(--space-8);
    line-height: 1.6;
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

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

/* Key Metrics Section */
.key-metrics {
    padding: var(--space-16) 0;
    background: var(--white);
    position: relative;
}

.key-metrics::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 0;
    right: 0;
    height: 50px;
    background: linear-gradient(180deg, var(--light-blue) 0%, var(--white) 100%);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
}

.metric-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.metric-card:hover::before {
    transform: scaleX(1);
}

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

.metric-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
}

.metric-icon svg {
    width: 30px;
    height: 30px;
    color: var(--white);
}

.metric-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.metric-label {
    font-size: var(--font-size-base);
    color: var(--gray-600);
    margin-bottom: var(--space-2);
    font-weight: 500;
}

.metric-change {
    font-size: var(--font-size-sm);
    color: var(--primary-blue);
    font-weight: 600;
    background: var(--light-blue);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
    display: inline-block;
}

/* Article Content Layout */
.article-content {
    padding: var(--space-24) 0;
    background: var(--gray-50);
}

.content-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--space-16);
    align-items: start;
}

/* Sidebar */
.content-sidebar {
    position: sticky;
    top: 120px;
}

.toc {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
}

.toc-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--gray-200);
}

.toc-list {
    list-style: none;
}

.toc-list li {
    margin-bottom: var(--space-2);
}

.toc-list a {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    position: relative;
}

.toc-list a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--primary-blue);
    border-radius: 2px;
    transition: height var(--transition-fast);
}

.toc-list a:hover,
.toc-list a.active {
    background: var(--light-blue);
    color: var(--primary-blue);
    transform: translateX(4px);
}

.toc-list a:hover::before,
.toc-list a.active::before {
    height: 20px;
}

/* Main Article */
.main-article {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--space-12);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.article-section {
    margin-bottom: var(--space-16);
    scroll-margin-top: 120px;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-8);
    position: relative;
    padding-bottom: var(--space-4);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
    border-radius: 2px;
}

.subsection-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-800);
    margin: var(--space-8) 0 var(--space-4) 0;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: start;
    margin-bottom: var(--space-8);
}

.text-content p {
    margin-bottom: var(--space-6);
    line-height: 1.8;
    color: var(--gray-700);
    font-size: var(--font-size-base);
}

.highlight-box {
    background: linear-gradient(135deg, var(--light-blue), rgba(16, 185, 129, 0.05));
    border: 1px solid var(--primary-blue);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin: var(--space-6) 0;
}

.highlight-box h4 {
    color: var(--primary-blue);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.highlight-box ul {
    margin-left: var(--space-4);
}

.highlight-box li {
    margin-bottom: var(--space-2);
    color: var(--gray-700);
}

/* Solar Cell Diagram */
.solar-cell-diagram {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px solid var(--gray-200);
}

.solar-cell-diagram h4 {
    text-align: center;
    margin-bottom: var(--space-4);
    color: var(--gray-800);
    font-weight: 600;
}

.diagram {
    width: 100%;
    height: auto;
    filter: drop-shadow(var(--shadow-sm));
}

/* Related Articles */
.related-articles {
    padding: var(--space-24) 0;
    background: var(--gray-100);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
    margin-top: var(--space-12);
}

.article-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.card-image {
    height: 200px;
    background: linear-gradient(135deg, var(--gray-100), var(--light-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.card-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.article-card:hover .card-image::before {
    transform: translateX(100%);
}

.placeholder-icon {
    width: 80px;
    height: 80px;
    opacity: 0.7;
}

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

.card-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-3);
}

.card-content p {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.read-time {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    font-weight: 500;
}

/* Additional responsive styles for articles */
@media (max-width: 1024px) {
    .content-layout {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .content-sidebar {
        position: static;
        order: -1;
    }
    
    .toc {
        display: none;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .article-hero {
        min-height: 50vh;
        margin-top: 70px;
    }
    
    .article-title {
        font-size: var(--font-size-4xl);
    }
    
    .article-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .article-meta {
        flex-direction: column;
        gap: var(--space-2);
    }
    
    .main-article {
        padding: var(--space-8) var(--space-6);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .key-metrics {
        padding: var(--space-12) 0;
    }
    
    .article-content {
        padding: var(--space-12) 0;
    }
    
    .main-article {
        padding: var(--space-6) var(--space-4);
        border-radius: var(--radius-lg);
    }
    
    .metric-card {
        padding: var(--space-6);
    }
}