/* Reset and 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;
    line-height: 1.6;
    color: #2d3748;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(26, 54, 93, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    color: #00d4ff;
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-logo i {
    margin-right: 10px;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #00d4ff;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #00d4ff;
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 50%, #1a202c 100%);
    z-index: -2;
}

.hero-background::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"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%2300d4ff" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

.hero-content {
    max-width: 800px;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    line-height: 1.2;
    animation: fadeInUp 1s ease-out;
}

.highlight {
    background: linear-gradient(45deg, #00d4ff, #ffd700);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-author {
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease-out 0.3s both;
}

.hero-author p {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.author-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.author-links a {
    color: #00d4ff;
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.author-links a:hover {
    transform: scale(1.2);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(45deg, #00d4ff, #0099cc);
    color: white;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border-right: 2px solid #00d4ff;
    border-bottom: 2px solid #00d4ff;
    transform: rotate(45deg);
}

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

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

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: #1a365d;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(45deg, #00d4ff, #ffd700);
    border-radius: 2px;
}

/* Expert Opinions */
.experts {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.quotes-carousel {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    min-height: 200px;
}

.quote {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.5s ease;
    text-align: center;
}

.quote.active {
    opacity: 1;
    transform: translateX(0);
}

.quote blockquote {
    font-size: 1.5rem;
    font-style: italic;
    color: #2d3748;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.quote cite {
    font-size: 1rem;
    color: #718096;
    font-weight: 500;
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #cbd5e0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: #00d4ff;
    transform: scale(1.2);
}

/* Blockchain Explanation */
.blockchain-explanation {
    background: white;
}

.blockchain-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.definition {
    background: linear-gradient(135deg, #00d4ff10, #ffd70010);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    border-left: 5px solid #00d4ff;
}

.definition p {
    font-size: 1.2rem;
    font-weight: 500;
    color: #1a365d;
}

.blockchain-components {
    display: grid;
    gap: 2rem;
}

.component h3 {
    color: #1a365d;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.component ul {
    list-style: none;
}

.component li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
    font-size: 1rem;
}

.component li i {
    color: #00d4ff;
    width: 20px;
}

.blockchain-image {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.blockchain-image:hover {
    transform: scale(1.05);
}

/* Ledger Evolution */
.ledger-evolution {
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    color: white;
}

.ledger-evolution .section-title {
    color: white;
}

.evolution-timeline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.evolution-step {
    text-align: center;
    flex: 1;
}

.step-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
    transition: all 0.3s ease;
}

.step-icon.centralized {
    background: linear-gradient(135deg, #e53e3e, #c53030);
}

.step-icon.federated {
    background: linear-gradient(135deg, #dd6b20, #c05621);
}

.step-icon.decentralized {
    background: linear-gradient(135deg, #38a169, #2f855a);
}

.evolution-step h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #00d4ff;
}

.evolution-arrow {
    font-size: 2rem;
    color: #00d4ff;
    margin: 0 1rem;
}

/* Qualities */
.qualities {
    background: white;
}

.qualities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.quality-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.quality-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.quality-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.5rem;
}

.quality-card h3 {
    color: #1a365d;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

/* Use Cases */
.use-cases {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.use-case-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.use-case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.use-case-card:hover::before {
    left: 100%;
}

.use-case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon i {
    font-size: 2rem;
    color: #00d4ff;
}

.icon-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.use-case-card h3 {
    color: #1a365d;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.card-details {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e2e8f0;
}

.card-details h4 {
    color: #2d3748;
    margin-bottom: 0.8rem;
    font-size: 1rem;
}

.card-details ul {
    list-style: none;
}

.card-details li {
    color: #718096;
    margin-bottom: 0.5rem;
    padding-left: 1rem;
    position: relative;
}

.card-details li::before {
    content: '•';
    color: #00d4ff;
    position: absolute;
    left: 0;
}

/* Pros and Cons */
.pros-cons {
    background: white;
}

.pros-cons-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pros, .cons {
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.pros {
    background: linear-gradient(135deg, #f0fff4, #c6f6d5);
    border-left: 5px solid #38a169;
}

.cons {
    background: linear-gradient(135deg, #fffaf0, #fed7d7);
    border-left: 5px solid #e53e3e;
}

.pros h3, .cons h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.pros h3 {
    color: #2f855a;
}

.cons h3 {
    color: #c53030;
}

.pros ul, .cons ul {
    list-style: none;
}

.pros li, .cons li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.pros li i {
    color: #38a169;
}

.cons li i {
    color: #e53e3e;
}

/* Trends */
.trends {
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    color: white;
}

.trends .section-title {
    color: white;
}

.trends-content {
    display: grid;
    gap: 3rem;
}

.trend-item h3 {
    color: #00d4ff;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.tech-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

.tech-tag {
    background: rgba(0, 212, 255, 0.2);
    color: #00d4ff;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    border: 1px solid rgba(0, 212, 255, 0.3);
}

/* Resources */
.resources {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.resource-category {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.resource-category h3 {
    color: #1a365d;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    border-bottom: 2px solid #00d4ff;
    padding-bottom: 0.5rem;
}

.resource-category ul {
    list-style: none;
}

.resource-category li {
    margin-bottom: 1rem;
}

.resource-category a {
    color: #2d3748;
    text-decoration: none;
    transition: color 0.3s ease;
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid #e2e8f0;
}

.resource-category a:hover {
    color: #00d4ff;
}

/* Footer */
.footer {
    background: #1a365d;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-info h3, .footer-contact h3 {
    color: #00d4ff;
    margin-bottom: 1rem;
}

.footer-contact a {
    color: #00d4ff;
    text-decoration: none;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #2d3748;
    color: #a0aec0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(26, 54, 93, 0.95);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .blockchain-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .evolution-timeline {
        flex-direction: column;
        gap: 2rem;
    }
    
    .evolution-arrow {
        transform: rotate(90deg);
    }
    
    .pros-cons-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .qualities-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 15px;
    }
}