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

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

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

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e7eb;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h2 {
    font-weight: 600;
    color: #1f2937;
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #6b7280;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: #3b82f6;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #3b82f6;
    transition: width 0.3s ease;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.paper-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.paper-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    font-weight: 300;
}

.author-info {
    margin-bottom: 2.5rem;
}

.authors {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.affiliations {
    font-size: 0.9rem;
    opacity: 0.8;
}

.paper-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Sections */
.section {
    padding: 80px 0;
}

.bg-light {
    background-color: #f9fafb;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 3rem;
    color: #1f2937;
}

/* Abstract */
.abstract-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
    text-align: justify;
    color: #4b5563;
}

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

.contribution-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contribution-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -3px rgba(0, 0, 0, 0.1);
}

.contribution-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
}

.contribution-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.contribution-item p {
    color: #6b7280;
    line-height: 1.6;
}

/* Examples List (Vertical Large Images) */
.examples-list {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    margin-top: 2rem;
}

.example-row {
    background: white;
    border-radius: 1rem;
    box-shadow: 0 4px 16px -2px rgba(0,0,0,0.07);
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.example-image-large {
    width: 100%;
    max-width: 700px;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
}

.example-image-large img {
    width: 100%;
    height: auto;
    border-radius: 0.75rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    object-fit: contain;
    background: #f3f4f6;
}

.example-content-large {
    text-align: center;
}

.example-content-large h3 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0.7rem;
    color: #1f2937;
}

.example-content-large p {
    color: #4b5563;
    font-size: 1.08rem;
    line-height: 1.7;
}

@media (max-width: 900px) {
    .example-row {
        padding: 1.5rem 0.5rem;
    }
    .example-image-large {
        max-width: 100%;
    }
}

@media (max-width: 600px) {
    .example-row {
        padding: 1rem 0.2rem;
    }
    .example-image-large {
        max-width: 100%;
    }
    .example-content-large h3 {
        font-size: 1.1rem;
    }
    .example-content-large p {
        font-size: 0.98rem;
    }
}

/* Details */
.details-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.detail-block {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.detail-block h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.detail-block p {
    color: #6b7280;
    line-height: 1.7;
}

/* Citation */
.citation-box {
    background: #1f2937;
    border-radius: 1rem;
    padding: 2rem;
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.citation-content code {
    color: #e5e7eb;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
    display: block;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: #374151;
    color: #e5e7eb;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.copy-btn:hover {
    background: #4b5563;
}

/* Footer */
.footer {
    background: #1f2937;
    color: #9ca3af;
    text-align: center;
    padding: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .paper-title {
        font-size: 2rem;
    }
    
    .paper-subtitle {
        font-size: 1rem;
    }
    
    .paper-links {
        flex-direction: column;
        align-items: center;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .contributions,
    .examples-list,
    .details-content {
        grid-template-columns: 1fr;
    }
}

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

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

.section > * {
    animation: fadeInUp 0.6s ease-out;
}

/* ICCC Conference Badge */
.conference-badge {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
}
.iccc-badge-link {
    text-decoration: none;
}
.iccc-badge {
    display: inline-block;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 0.7rem 1.5rem;
    border-radius: 2rem;
    box-shadow: 0 2px 8px rgba(102,126,234,0.10);
    text-align: center;
    letter-spacing: 0.01em;
    transition: background 0.2s;
}
.iccc-badge:hover {
    background: linear-gradient(90deg, #764ba2 0%, #667eea 100%);
    color: #fff;
}
.iccc-sub {
    display: block;
    font-size: 0.95rem;
    font-weight: 400;
    opacity: 0.92;
    margin-top: 0.2rem;
}

.btn-presentation {
    background: #ff0000;
    color: #fff;
    border: none;
}
.btn-presentation:hover {
    background: #d90429;
    color: #fff;
}

/* Abstract Mobile Fix */
@media (max-width: 600px) {
    .abstract-content p {
        word-break: normal;
        text-align: left;
        max-width: 100%;
        margin: 0;
        font-size: 1.02rem;
        line-height: 1.7;
    }
}