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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: #2563eb;
}

.nav-logo i {
    margin-right: 0.5rem;
    font-size: 1.5rem;
}

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

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #2563eb;
    transition: width 0.3s ease;
}

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.1)" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #ffffff, #e2e8f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    font-weight: 300;
}

.hero-author {
    margin-bottom: 2rem;
    opacity: 0.8;
}

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

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.cta-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.floating-icons {
    position: relative;
    width: 300px;
    height: 300px;
}

.icon-item {
    position: absolute;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    animation: float 6s ease-in-out infinite;
    animation-delay: var(--delay);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.icon-item:nth-child(1) { top: 0; left: 50%; transform: translateX(-50%); }
.icon-item:nth-child(2) { top: 20%; right: 0; }
.icon-item:nth-child(3) { bottom: 20%; right: 0; }
.icon-item:nth-child(4) { bottom: 0; left: 50%; transform: translateX(-50%); }
.icon-item:nth-child(5) { top: 20%; left: 0; }

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

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

.section:nth-child(even) {
    background-color: #f8fafc;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: #1e293b;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(45deg, #2563eb, #7c3aed);
    border-radius: 2px;
}

.section-description {
    text-align: center;
    font-size: 1.1rem;
    color: #64748b;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Abstract Section */
.abstract-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.lead {
    font-size: 1.3rem;
    font-weight: 400;
    color: #475569;
    margin-bottom: 3rem;
    line-height: 1.7;
}

.organizations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.org-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.org-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

.org-card i {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.org-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1e293b;
}

.org-card p {
    color: #64748b;
    font-size: 0.9rem;
}

/* Methodology Section */
.methodology-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

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

.methodology-section .section-title::after {
    background: rgba(255, 255, 255, 0.5);
}

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

.method-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 2.5rem;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.method-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.method-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

.method-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.method-card p {
    margin-bottom: 1.5rem;
    opacity: 0.9;
    line-height: 1.6;
}

.method-orgs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.org-tag {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Findings Section */
.findings-container {
    display: grid;
    gap: 2rem;
}

.finding-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.finding-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

.finding-header {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.finding-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #2563eb, #7c3aed);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-right: 1rem;
}

.finding-title h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.2rem;
}

.finding-category {
    color: #64748b;
    font-size: 0.9rem;
    font-weight: 500;
}

.finding-content p {
    margin-bottom: 1rem;
    color: #475569;
    line-height: 1.6;
}

.finding-points {
    list-style: none;
    margin-bottom: 1.5rem;
}

.finding-points li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #64748b;
}

.finding-points li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #2563eb;
    font-weight: bold;
}

.key-insight {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(45deg, #2563eb, #7c3aed);
    color: white;
    padding: 1rem;
    border-radius: 10px;
    font-weight: 500;
}

.key-insight i {
    font-size: 1.2rem;
}

/* Discussion Section */
.discussion-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.discussion-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.discussion-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

.discussion-card h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.3rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1rem;
}

.discussion-card h3 i {
    color: #2563eb;
}

.discussion-card p {
    color: #64748b;
    line-height: 1.6;
}

/* Conclusion Section */
.conclusion-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
}

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

.conclusion-section .section-title::after {
    background: rgba(255, 255, 255, 0.5);
}

.conclusion-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.conclusion-text {
    font-size: 1.2rem;
    line-height: 1.7;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.conclusion-highlights {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: left;
}

.highlight-item i {
    font-size: 1.5rem;
    color: #60a5fa;
    min-width: 24px;
}

.citation-section {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.citation-section h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.citation-box {
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid #60a5fa;
}

.citation-box p {
    font-style: italic;
    line-height: 1.6;
    margin: 0;
}

/* Footer */
.footer {
    background: #0f172a;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-info h4,
.footer-author h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #60a5fa;
}

.footer-info p,
.footer-author p {
    color: #94a3b8;
    margin-bottom: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 1rem;
    text-align: center;
    color: #64748b;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        backdrop-filter: blur(10px);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .floating-icons {
        width: 250px;
        height: 250px;
    }
    
    .icon-item {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .organizations-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }
    
    .methodology-grid {
        grid-template-columns: 1fr;
    }
    
    .discussion-content {
        grid-template-columns: 1fr;
    }
    
    .conclusion-highlights {
        text-align: left;
    }
    
    .highlight-item {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-container {
        padding: 1rem 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .organizations-grid {
        grid-template-columns: 1fr;
    }
    
    .org-card,
    .method-card,
    .finding-card,
    .discussion-card {
        padding: 1.5rem;
    }
}