/* style.css - Enhanced styling for publications page */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Source Sans 3',sans-serif;color:var(--text);background:var(--white)}

/* NAV */
nav{position:fixed;top:0;width:100%;z-index:100;background:rgba(10,31,60,0.97);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:space-between;padding:0 60px;height:80px;border-bottom:1px solid rgba(74,179,232,0.2);transition:box-shadow .3s}
nav.scrolled{box-shadow:0 4px 32px rgba(0,0,0,.35)}
.nav-logo{display:flex;align-items:center;gap:18px;text-decoration:none}
/* ===== Logo Icone ===== */
.logo-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--sky),var(--accent));border-radius:8px;display:flex;align-items:center;justify-content:center;font-family:'Playfair Display',serif;font-size:15px;font-weight:700;color:white;flex-shrink:0}
.nav-logo-img{width:80px;height:60px;border-radius:10px;object-fit:cover;flex-shrink:0;background:rgba(255,255,255,0.06)}
/* ===== Logo Lab Name Font Size ===== */
.logo-text{font-family:'Playfair Display',serif;font-size:20px;font-weight:600;color:white;line-height:1.2}
/* ===== Institute Name Below Logo ===== */
.logo-sub{font-size:14px;color:var(--accent);font-weight:300;letter-spacing:1px;text-transform:uppercase}
nav ul{list-style:none;display:flex;gap:26px}
nav ul a{color:rgba(255,255,255,.75);text-decoration:none;font-size:14px;letter-spacing:.5px;text-transform:uppercase;font-weight:400;transition:color .2s;padding:4px 0;border-bottom:2px solid transparent;transition:color .2s,border-color .2s}
nav ul a:hover{color:var(--accent);border-color:var(--accent)}
.hamburger{display:none;background:none;border:none;color:white;font-size:22px;cursor:pointer;padding:4px}

/* Hero Section */
.hero-small {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 5.0rem 0;
    text-align: center;
}

.section-label {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.section-title {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.section-divider {
    width: 50px;
    height: 3px;
    background: white;
    margin: 1rem auto;
}

.hero-description {
    max-width: 700px;
    margin: 1rem auto;
    font-size: 1.3rem;
    opacity: 1.2;
}

.pub-actions {
    margin-top: 2rem;
}

.btn-primary {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 0.8rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    transition: transform 0.3s, box-shadow 0.3s;
    font-weight: 500;
    font-size: 1.2rem; /* font size*/
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

/* Stats Section */
.stats-section {
    background: white;
    padding: 0.8rem 0;
    margin-bottom: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.stats-grid {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: bold;
    color: #3498db;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-top: 0.5rem;
}

/* Filters */
.publication-filters {
    margin: 2rem 0;
    text-align: center;
}

.filter-btn {
    background: #ecf0f1;
    border: none;
    padding: 0.75rem 1.5rem;
    margin: 0 0.5rem;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s;
    font-size: 1rem;
}

.filter-btn:hover {
    background: #3498db;
    color: white;
    transform: translateY(-2px);
}

.filter-btn.active {
    background: #2c3e50;
    color: white;
}

/* Publications Container */
.publications-container {
    margin-bottom: 4rem;
}
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Publications Grid */
.publications-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
    align-items: stretch;
}

@media (max-width: 768px) {

    .publications-list {
        grid-template-columns: 1fr;
    }

}

.publication-card {
    background: #fff;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border-left: 4px solid #1a4a8a;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}
.publication-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.publication-year-badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: #3498db;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: bold;
}

.publication-title {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    padding-right: 80px;
}

.publication-authors {
    color: #7f8c8d;
    margin-bottom: 0.5rem;
    font-style: italic;
    font-size: 0.95rem;
}

.publication-citation {
    color: #555;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    font-size: 0.95rem;
}

.publication-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.pub-type-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.pub-type-badge.journal {
    background: #e8f4f8;
    color: #2980b9;
}

.pub-type-badge.conference {
    background: #fdf2e9;
    color: #e67e22;
}

.publisher {
    font-size: 0.85rem;
    color: #95a5a6;
}

.doi-link {
    display: inline-block;
    background: #f0f0f0;
    color: #3498db;
    text-decoration: none;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    transition: all 0.3s;
}

.doi-link:hover {
    background: #3498db;
    color: white;
    text-decoration: none;
}

/* No Results */
.no-results {
    text-align: center;
    padding: 3rem;
    color: #7f8c8d;
    background: white;
    border-radius: 8px;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .publication-filters {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .filter-btn {
        width: 100%;
        margin: 0;
    }
    
    .stats-grid {
        gap: 1.5rem;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    .publication-card {
        padding: 1rem;
    }
    
    .publication-title {
        font-size: 1rem;
        padding-right: 70px;
    }
    
    .publication-year-badge {
        top: 1rem;
        right: 1rem;
        font-size: 0.8rem;
        padding: 0.2rem 0.6rem;
    }
    
    .publication-citation,
    .publication-authors {
        font-size: 0.85rem;
    }
    
    .publication-meta {
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-small {
        padding: 2rem 0;
    }
    
    .publication-title {
        font-size: 0.95rem;
    }
}