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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --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);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

.fade-in-delay {
    animation: fadeIn 0.8s ease-out 0.2s forwards;
    opacity: 0;
}

.fade-in-delay-2 {
    animation: fadeIn 0.8s ease-out 0.4s forwards;
    opacity: 0;
}

.fade-in-delay-3 {
    animation: fadeIn 0.8s ease-out 0.6s forwards;
    opacity: 0;
}

.fade-in-delay-4 {
    animation: fadeIn 0.8s ease-out 0.8s forwards;
    opacity: 0;
}

.fade-in-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6rem 0 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 2rem;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.authors {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.author {
    display: inline-block;
    margin: 0.25rem 0.5rem;
    white-space: nowrap;
}

.author-link {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.author-link:hover {
    border-bottom-color: rgba(255, 255, 255, 0.8);
    opacity: 0.9;
}

.affiliation {
    position: relative;
    z-index: 1;
}

.corresponding {
    position: relative;
    z-index: 1;
    font-style: italic;
}

.conference {
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.conference-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1.5rem;
    border-radius: 2rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

.links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Teaser Section */
.teaser {
    padding: 4rem 0;
    background: var(--bg-light);
}

.teaser-image {
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transition: transform 0.3s ease;
}

.teaser-image:hover {
    transform: scale(1.02);
}

.teaser-image img {
    width: 100%;
    height: auto;
    display: block;
}

.caption {
    padding: 1.5rem;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Abstract Section */
.abstract {
    padding: 4rem 0;
    background: white;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.abstract-content {
    max-width: 900px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
}

.abstract-content p {
    margin-bottom: 1.5rem;
}

.highlight-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin: 2rem 0;
}

/* Method Section */
.method {
    padding: 4rem 0;
    background: var(--bg-light);
}

.method-overview,
.method-solution,
.method-variants {
    margin-bottom: 3rem;
}

.method-overview h3,
.method-solution h3,
.method-variants h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.method-overview p,
.method-solution p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.math-equation {
    background: white;
    padding: 2rem;
    border-radius: 0.75rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-color);
}

.math-equation p {
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.equation-description {
    color: var(--text-light);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    margin-top: 1rem;
}

.method-image {
    margin: 3rem 0;
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.method-image img {
    width: 100%;
    height: auto;
    display: block;
}

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

.step {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.step-number {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

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

.step-content p {
    color: var(--text-light);
    line-height: 1.6;
}

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

.variant-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.variant-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

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

.variant-card h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.variant-card p {
    margin-bottom: 0.75rem;
    line-height: 1.6;
    color: var(--text-light);
}

/* Results Section */
.results {
    padding: 4rem 0;
    background: white;
}

.results-intro {
    max-width: 900px;
    margin: 0 auto 3rem;
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
}

.result-section {
    margin-bottom: 4rem;
}

.result-section h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.result-image {
    background: var(--bg-light);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

.result-image img {
    width: 100%;
    height: auto;
    display: block;
}

.key-findings {
    display: grid;
    gap: 1rem;
    margin-top: 2rem;
}

.finding {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 0.75rem;
    transition: all 0.3s ease;
}

.finding:hover {
    background: white;
    box-shadow: var(--shadow-md);
}

.finding .icon {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.finding p {
    flex: 1;
    line-height: 1.6;
    color: var(--text-light);
}

.metrics {
    margin-top: 4rem;
}

.metrics h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 2rem;
    text-align: center;
}

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

.metric-card {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.metric-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.metric-value {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.metric-card h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.metric-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Insight Section */
.insight {
    padding: 4rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.insight-box {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    color: white;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    backdrop-filter: blur(10px);
}

.insight-box h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.insight-text {
    font-size: 1.5rem;
    font-weight: 500;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.insight-subtext {
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.7;
}

/* Details Section */
.details {
    padding: 4rem 0;
    background: var(--bg-light);
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.detail-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.detail-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.detail-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.detail-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Citation Section */
.citation {
    padding: 4rem 0;
    background: white;
}

.citation-box {
    max-width: 800px;
    margin: 2rem auto;
    position: relative;
    background: var(--text-dark);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.citation-box pre {
    margin: 0;
    padding: 2rem;
    overflow-x: auto;
}

.citation-box code {
    color: #a5d6ff;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.copy-btn:active {
    transform: translateY(0);
}

/* Footer */
footer {
    background: var(--text-dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero {
        padding: 4rem 0 3rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .method-steps,
    .variants-grid,
    .metrics-grid,
    .details-grid {
        grid-template-columns: 1fr;
    }
    
    .links {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        justify-content: center;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection Color */
::selection {
    background: var(--primary-color);
    color: white;
}

::-moz-selection {
    background: var(--primary-color);
    color: white;
}