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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

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

/* Header & Navigation */
header {
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1a1a1a;
}

.nav-link {
    color: #4a5568;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #2563eb;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(218, 142, 0, 0.75), rgba(184, 107, 0, 0.75)), url('Cover_image.jpg');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 6rem 0;
    text-align: center;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}
.title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.95;
    font-weight: 300;
}

.meta {
    font-size: 1rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

/* Buttons */
.cta-button {
    display: inline-block;
    background-color: #ffffff;
    color: #667eea;
    padding: 1rem 2.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.cta-button.secondary {
    background-color: #667eea;
    color: white;
}

/* Abstract Section */
.abstract {
    padding: 5rem 0;
    background-color: #f9fafb;
}

.abstract h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #1a1a1a;
}

.abstract p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #4a5568;
    max-width: 900px;
}

/* Key Findings */
.key-findings {
    padding: 5rem 0;
    background-color: #ffffff;
}

.key-findings h2 {
    font-size: 2rem;
    margin-bottom: 3rem;
    text-align: center;
    color: #1a1a1a;
}

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

.finding-card {
    background-color: #f9fafb;
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.finding-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.finding-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.finding-card p {
    color: #4a5568;
    line-height: 1.7;
}

/* About Section */
.about {
    padding:  5rem 0 0.5rem 0;
    background-color: #f9fafb;
}

.about h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #1a1a1a;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #4a5568;
    margin-bottom: 1.5rem;
    max-width: 900px;
}

/* Download Section */
.download-section {
    padding: 5rem 0;
    background-color: #ffffff;
    text-align: center;
}

.download-section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #1a1a1a;
}

.download-section p {
    font-size: 1.125rem;
    color: #4a5568;
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
footer {
    background-color: #1a1a1a;
    color: #ffffff;
    padding: 3rem 0;
    text-align: center;
}

footer p {
    margin: 0.5rem 0;
    opacity: 0.8;
}

.contact {
    font-size: 0.95rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.25rem;
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .findings-grid {
        grid-template-columns: 1fr;
    }
    
    section {
        padding: 3rem 0;
    }
}