/* Project Page Styles */

.project-page {
    background: var(--background-white);
}

/* Project Navigation */
.project-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 16px 0;
}

.project-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-link {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--primary-color);
}

.back-link i {
    font-size: 1rem;
}

.nav-links {
    display: flex;
    gap: 24px;
}

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

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

/* Project Main */
.project-main {
    padding-top: 70px;
}

/* Project Hero */
.project-hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
    padding: 80px 0;
}

.project-hero-content {
    max-width: 800px;
}

.project-badges {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge.featured {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
}

.badge.status {
    background: rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.9);
}

.project-hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}

.project-tagline {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
}

.project-meta-info {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 32px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

.meta-item i {
    color: #60a5fa;
}

.project-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.project-actions .btn {
    padding: 14px 28px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

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

.project-actions .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.project-actions .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.project-actions .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

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

.project-section.alt-bg {
    background: var(--background-alt);
}

.project-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.project-section h2 i {
    color: var(--primary-color);
}

/* Overview Content */
.overview-content {
    max-width: 800px;
}

.overview-content .lead {
    font-size: 1.2rem;
    color: var(--text-dark);
    font-weight: 500;
    margin-bottom: 20px;
    line-height: 1.7;
}

.overview-content p {
    color: var(--text-medium);
    line-height: 1.8;
    margin-bottom: 16px;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon i {
    font-size: 1.5rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-medium);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Technical Approach */
.approach-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.approach-content {
    max-width: 100%;
}

.approach-item {
    margin-bottom: 32px;
    padding-left: 24px;
    border-left: 3px solid var(--primary-color);
}

.approach-item h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.approach-item p {
    color: var(--text-medium);
    line-height: 1.7;
}

/* Approach Visual/Diagram */
.approach-visual {
    position: sticky;
    top: 100px;
}

.diagram-container {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.diagram-container h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
    text-align: center;
}

.diagram-wrapper {
    position: relative;
    width: 100%;
    min-height: 400px;
    border-radius: 12px;
    overflow: hidden;
    background: var(--background-alt);
    border: 1px solid var(--border-color);
}

.project-diagram {
    width: 100%;
    height: 600px;
    border: none;
    display: block;
}

.project-diagram.pdf-embed {
    min-height: 600px;
}

.project-diagram.image-diagram {
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    display: block;
}

.diagram-fallback {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
    min-height: 400px;
}

/* Show fallback if PDF embed fails */
.project-diagram.pdf-embed:not([src]),
.project-diagram.pdf-embed[src=""],
.project-diagram.pdf-embed[src="#"] {
    display: none;
}

.project-diagram.pdf-embed:not([src]) ~ .diagram-fallback,
.project-diagram.pdf-embed[src=""] ~ .diagram-fallback,
.project-diagram.pdf-embed[src="#"] ~ .diagram-fallback {
    display: flex;
}

.diagram-fallback i {
    font-size: 3rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.diagram-fallback p {
    color: var(--text-medium);
    font-size: 1rem;
    margin-bottom: 16px;
}

.diagram-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
}

.diagram-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.diagram-caption {
    margin-top: 16px;
    font-size: 0.9rem;
    color: var(--text-medium);
    text-align: center;
    font-style: italic;
    line-height: 1.6;
}

/* Responsive Approach Layout */
@media (max-width: 1024px) {
    .approach-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .approach-visual {
        position: static;
    }
    
    .project-diagram {
        height: 500px;
    }
}

@media (max-width: 768px) {
    .diagram-container {
        padding: 20px;
    }
    
    .project-diagram {
        height: 400px;
    }
    
    .diagram-wrapper {
        min-height: 300px;
    }
}

/* Tech Stack */
.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tech-item {
    padding: 10px 20px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-dark);
    transition: var(--transition);
}

.tech-item:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Publications List */
.publications-list {
    max-width: 800px;
}

.publication-entry {
    padding: 24px;
    background: var(--background-alt);
    border-radius: 12px;
    margin-bottom: 16px;
    border-left: 4px solid var(--primary-color);
}

.publication-entry.planned {
    border-left-color: #f59e0b;
    background: #fffbeb;
}

.publication-entry h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.publication-entry p {
    color: var(--text-medium);
    margin-bottom: 12px;
}

.publication-entry .pub-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.publication-entry .pub-link:hover {
    text-decoration: underline;
}

/* CTA Section */
.project-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 80px 0;
    text-align: center;
}

.project-cta h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
    justify-content: center;
}

.project-cta p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.project-cta .btn-lg {
    padding: 18px 40px;
    font-size: 1.1rem;
    border-radius: 12px;
    background: white;
    color: var(--primary-color);
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
}

.project-cta .btn-lg:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* Project Footer */
.project-footer {
    background: var(--secondary-color);
    color: rgba(255, 255, 255, 0.8);
    padding: 32px 0;
}

.project-footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .project-hero {
        padding: 60px 0;
    }
    
    .project-hero h1 {
        font-size: 1.75rem;
    }
    
    .project-tagline {
        font-size: 1.1rem;
    }
    
    .project-meta-info {
        flex-direction: column;
        gap: 12px;
    }
    
    .project-section {
        padding: 60px 0;
    }
    
    .project-section h2 {
        font-size: 1.5rem;
    }
    
    .project-footer .container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .nav-links {
        display: none;
    }
}

@media (max-width: 480px) {
    .project-actions {
        flex-direction: column;
    }
    
    .project-actions .btn {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}