* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2d5016;
    --secondary-color: #3d6e1f;
    --accent-color: #52B788;
    --dark-color: #1a1a1a;
    --light-color: #f5f5f5;
    --text-color: #333;
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Navigation Bar */
.navbar {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-brand img {
    width: 40px;
    height: 40px;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(55, 183, 195, 0.3);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #2d5016 0%, #52B788 50%, #4CAF50 100%);
    color: white;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.blockchain-visual {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.chain-node {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    border-radius: var(--border-radius);
    padding: 15px 20px;
    font-weight: 600;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.chain-node:hover,
.chain-node.active {
    background: white;
    color: var(--primary-color);
    transform: scale(1.05);
}

.chain-connector {
    width: 30px;
    height: 3px;
    background: white;
}

/* Challenges Section */
.challenges {
    padding: 80px 0;
    background: linear-gradient(135deg, #e8f5e9 0%, #d4edda 50%, #c8e6c9 100%);
}

.challenges h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

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

.challenge-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    border-top: 4px solid var(--primary-color);
}

.challenge-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.challenge-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.challenge-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.challenge-card p {
    color: #666;
    line-height: 1.6;
}

/* Solution Section */
.solution {
    padding: 80px 0;
    background: linear-gradient(to right, #f1f8f4 0%, #e8f5e9 50%, #f5faf3 100%);
}

.solution h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.solution-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    color: #555;
}

.solution-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.feature-icon {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
}

.feature p {
    line-height: 1.6;
    color: #555;
}

.network-diagram {
    position: relative;
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, rgba(55, 183, 195, 0.1) 0%, rgba(45, 154, 163, 0.1) 100%);
    border-radius: var(--border-radius);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
}

.network-node {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: white;
    font-size: 0.9rem;
    text-align: center;
    position: relative;
    border: 3px solid white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    animation: float 3s ease-in-out infinite;
}

.node-content {
    background: rgba(0, 0, 0, 0.1);
    padding: 10px;
    border-radius: 50%;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.network-node.producer {
    background: linear-gradient(135deg, #2d5016, #52B788);
}

.network-node.inspector {
    background: linear-gradient(135deg, #FFB23F, #FF9800);
    animation-delay: 0.2s;
}

.network-node.logistics {
    background: linear-gradient(135deg, #9C27B0, #673AB7);
    animation-delay: 0.4s;
}

.network-node.manufacturer {
    background: linear-gradient(135deg, #4CAF50, #45a049);
    animation-delay: 0.6s;
}

.network-node.importer {
    background: linear-gradient(135deg, #2196F3, #1976D2);
    animation-delay: 0.8s;
}

.network-node.bank {
    background: linear-gradient(135deg, #E91E63, #C2185B);
    animation-delay: 0.3s;
}

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

/* Case Study Section */
.case-study {
    padding: 80px 0;
    background: linear-gradient(to right, #f5faf3 0%, #e8f5e9 30%, #f1f8f4 100%);
}

.case-study h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.journey-timeline {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 3rem 0;
    align-items: center;
}

.journey-step {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    position: relative;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.08);
    border-left: 5px solid var(--primary-color);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: bold;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.journey-step h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.journey-step p {
    color: #666;
    line-height: 1.6;
}

.timeline-arrow {
    text-align: center;
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: bold;
}

.second-timeline {
    margin-top: 3rem;
}

.transaction-flow {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.08);
}

.transaction-flow h3 {
    color: var(--text-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.flow-step {
    background: linear-gradient(135deg, rgba(55, 183, 195, 0.1), rgba(45, 154, 163, 0.1));
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

.flow-header {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.flow-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.flow-details p {
    color: #555;
    line-height: 1.6;
}

/* Benefits Section */
.benefits {
    padding: 80px 0;
    background: linear-gradient(135deg, #d4edda 0%, #c8e6c9 50%, #e8f5e9 100%);
}

.benefits h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.benefit-item {
    background: linear-gradient(135deg, rgba(55, 183, 195, 0.05), rgba(45, 154, 163, 0.05));
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 2px solid rgba(55, 183, 195, 0.2);
    transition: var(--transition);
}

.benefit-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 25px rgba(55, 183, 195, 0.15);
}

.benefit-item h4 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.benefit-item ul {
    list-style: none;
}

.benefit-item li {
    padding: 0.7rem 0;
    color: #555;
    border-bottom: 1px solid rgba(55, 183, 195, 0.2);
}

.benefit-item li:last-child {
    border-bottom: none;
}

.benefit-item li::before {
    content: "✓ ";
    color: var(--primary-color);
    font-weight: bold;
    margin-right: 8px;
}

/* Impact Section */
.impact {
    background: linear-gradient(135deg, #2d5016 0%, #3d6e1f 50%, #4CAF50 100%);
    color: white;
    padding: 80px 0;
}

.impact h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.impact-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.stat {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.stat:hover {
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.15);
}

.stat h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.stat p {
    font-size: 1rem;
    opacity: 0.9;
}

/* Contact Section */
.contact {
    background: linear-gradient(135deg, #d4edda 0%, #c8e6c9 50%, #e8f5e9 100%);
    padding: 4rem 0;
    margin-top: 3rem;
}

.contact h2 {
    text-align: center;
    margin-bottom: 1rem;
    font-size: 2.5rem;
    color: var(--primary-color);
}

.section-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.contact-card p {
    margin: 0.5rem 0;
    color: #666;
}

.contact-card a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.contact-card a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.contact-form h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.contact-form .form-group {
    margin-bottom: 1.5rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(55, 183, 195, 0.1);
}

.contact-form button {
    width: 100%;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.contact-form button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(55, 183, 195, 0.3);
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: white;
    text-align: center;
    padding: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container,
    .solution-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .nav-links {
        flex-direction: column;
        gap: 1rem;
    }

    .journey-timeline {
        grid-template-columns: 1fr;
    }

    .timeline-arrow {
        transform: rotate(90deg);
        margin: 1rem 0;
    }

    .challenges h2,
    .solution h2,
    .benefits h2,
    .case-study h2,
    .impact h2,
    .contact h2 {
        font-size: 1.8rem;
    }

    .network-diagram {
        height: auto;
    }

    .network-node {
        width: 100px;
        height: 100px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .nav-brand span {
        display: none;
    }

    .challenges-grid,
    .benefits-grid,
    .impact-stats,
    .contact-info {
        grid-template-columns: 1fr;
    }

    .blockchain-visual {
        flex-direction: column;
    }

    .chain-connector {
        width: 3px;
        height: 30px;
    }
}