/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --tertiary-gradient: linear-gradient(135deg, #004888 0%, #017278 100%);
    --success-gradient: linear-gradient(135deg, #81ffef 0%, #f067b4 100%);
    --warning-gradient: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    --dark-gradient: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #ffffff;
    
    --shadow-light: 0 5px 15px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 10px 30px rgba(0, 0, 0, 0.12);
    --shadow-heavy: 0 20px 60px rgba(0, 0, 0, 0.15);
    
    --border-radius: 15px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    overflow-x: hidden;
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

#loading-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-logo {
    margin-bottom: 2rem;
}

.logo-circle {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    animation: pulse 2s infinite;
}

.logo-circle i {
    font-size: 2rem;
    animation: rotate 3s linear infinite;
}

.loading-text {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: 3px;
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
    margin: 0 auto;
    overflow: hidden;
}

.loading-progress {
    width: 0%;
    height: 100%;
    background: white;
    border-radius: 2px;
    animation: loading 1s ease-in-out infinite;
}

/* Navigation */
.modern-nav {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    padding: 1rem 0;
}

.modern-nav.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-medium);
}

.brand-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.brand-logo {
    width: 50px;
    height: 50px;
    background: transparent;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: transparent;
    font-size: 1.5rem;
    box-shadow: transparent;
}

.brand-info {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.brand-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.navbar-toggler {
    border: none;
    padding: 0;
    width: 30px;
    height: 30px;
    position: relative;
}

.navbar-toggler span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 5px 0;
    transition: var(--transition);
    border-radius: 2px;
}

.nav-link {
    color: var(--text-primary) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
    margin: 0 0.2rem;
}

.nav-link:hover {
    background: var(--primary-gradient);
    color: white !important;
    transform: translateY(-2px);
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0.9;
}

.geometric-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 200px;
    height: 200px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.shape-3 {
    width: 100px;
    height: 100px;
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

.shape-4 {
    width: 80px;
    height: 80px;
    top: 30%;
    right: 30%;
    animation-delay: 1s;
}

.hero-content {
    color: white;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.highlight-text {
    background: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 500px;
}

.hero-actions {
    margin-bottom: 3rem;
}

.btn-primary {
    background: var(--secondary-gradient);
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
    background: var(--secondary-gradient);
}

.btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.5);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.btn-outline-light:hover {
    background: white;
    color: var(--text-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.hero-stats {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

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

.hero-visual {
    position: relative;
}

.main-image {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-heavy);
}

.main-image img {
    width: 100%;
    height: auto;
    transition: var(--transition);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--tertiary-gradient);
    opacity: 0.3;
    mix-blend-mode: overlay;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    box-shadow: var(--shadow-medium);
    color: var(--text-primary);
    font-weight: 600;
    animation: float 4s ease-in-out infinite;
}

.card-research {
    top: 15%;
    right: -15%;
    animation-delay: 0s;
}

.card-innovation {
    bottom: 30%;
    left: -15%;
    animation-delay: 1.5s;
}

.card-global {
    top: 50%;
    right: -20%;
    animation-delay: 3s;
}

.floating-card i {
    font-size: 1.2rem;
    color: #667eea;
}

/* Welcome Section */
.welcome-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
}

.section-badge {
    display: inline-block;
    background: var(--primary-gradient);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.welcome-content .lead {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.feature-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature-content p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.95rem;
}

/* Sidebar */
.sidebar-container {
    position: sticky;
    top: 100px;
}

.submit-card {
    background: var(--success-gradient);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-medium);
}

.submit-header i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.submit-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.submit-header p {
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

.btn-submit {
    background: white;
    color: var(--text-primary);
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    background: white;
    color: var(--text-primary);
}

.quick-links-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

.quick-links-card h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.links-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.quick-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    border: 1px solid transparent;
}

.quick-link:hover {
    background: var(--primary-gradient);
    color: white;
    transform: translateX(5px);
}

.quick-link i:first-child {
    width: 20px;
    text-align: center;
}

.quick-link span {
    flex: 1;
    font-weight: 500;
}

.quick-link i:last-child {
    font-size: 0.8rem;
    opacity: 0.7;
}

/* Journal Information */
.journal-info-section {
    background: var(--warning-gradient);
    position: relative;
}

.info-card, .scope-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-medium);
    height: 100%;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f8f9fa;
}

.card-header i {
    font-size: 1.5rem;
    color: #667eea;
}

.card-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.info-label {
    font-weight: 600;
    color: var(--text-primary);
    min-width: 100px;
}

.info-value {
    color: var(--text-secondary);
    text-align: right;
    flex: 1;
    margin-left: 1rem;
}

.scope-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.scope-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.scope-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-light);
    background: var(--primary-gradient);
    color: white;
}

.scope-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.scope-item:hover .scope-icon {
    background: white;
    color: #667eea;
}

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

.scope-item:hover .scope-icon i {
    color: #667eea;
}

.scope-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.scope-content p {
    font-size: 0.9rem;
    opacity: 0.8;
    margin: 0;
}

/* Publication Highlights */
.highlights-section {
    background: var(--tertiary-gradient);
    color: white;
}

.highlights-section .section-badge {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.highlights-section .section-title,
.highlights-section .section-subtitle {
    color: white;
}

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

.highlight-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.highlight-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-heavy);
}

.highlight-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

.highlight-card h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: white;
}

.highlight-card p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}

/* Footer */
.footer {
    background: var(--dark-gradient);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-section {
    margin-bottom: 2rem;
}

.footer-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section h5 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
    line-height: 1.6;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    margin-top: 2rem;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}

.social-links {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-gradient);
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

/* Animations */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes loading {
    0% {
        width: 0%;
    }
    50% {
        width: 100%;
    }
    100% {
        width: 0%;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        justify-content: center;
        gap: 1rem;
    }
    
    .floating-card {
        position: static;
        margin: 1rem 0;
        animation: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .highlights-grid {
        grid-template-columns: 1fr;
    }
    
    .scope-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .social-links {
        justify-content: center;
        margin-top: 1rem;
    }
    
    .sidebar-container {
        position: static;
        margin-top: 2rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .info-row {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .info-value {
        text-align: left;
        margin-left: 0;
    }
}

/* Scroll animations */
[data-aos] {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-gradient);
}
.quick-link2 {
    background: var(--primary-gradient);
    color: white !important;
    transform: translateX(5px);
}
.quick-link3 {
    background: var(--secondary-gradient);
    color: white !important;
    transform: translateX(5px);
}
.quick-link3:hover {
    background: var(--primary-gradient);
    color: white !important;
    transform: translateX(5px);
}
.scope-item2 {
    background: #fecfb766;
}
a.quick-link.quick-link4 {
    padding: 5px;
}