/* Base Styles */
:root {
    --primary-color: #3B82F6;
    --primary-dark: #2563EB;
    --secondary-color: #10B981;
    --accent-color: #F59E0B;
    --danger-color: #EF4444;
    --dark-color: #1F2937;
    --light-color: #F9FAFB;
    --gray-color: #6B7280;
    --max-width: 1200px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: 1px solid var(--primary-color);
}

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

.section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--gray-color);
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.hidden {
    display: none !important;
}

/* Header Styles */
header {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.navbar img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-item {
    position: relative;
    margin-left: 1.5rem;
}

.nav-link {
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav-item.dropdown:hover .dropdown-menu,
.nav-item.dropdown.active .dropdown-menu,
.nav-item.dropdown.mobile-active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    border-bottom: 1px solid #eee;
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.dropdown-menu a:hover {
    background-color: #f5f5f5;
    color: var(--primary-color);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    cursor: pointer;
    z-index: 100;
}

.bar {
    width: 100%;
    height: 2px;
    background-color: var(--dark-color);
    transition: all 0.3s ease;
}

.hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 10rem 0 5rem;
    background: linear-gradient(rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.9)), url('images/hero.jpg') no-repeat center center/cover;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto 3rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--gray-color);
    margin-bottom: 2rem;
}

/* Team Section */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.team-member {
    background-color: white;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.team-member:hover {
    transform: translateY(-5px);
}

.member-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.member-info {
    padding: 1.5rem;
    text-align: center;
}

.member-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.member-role {
    color: var(--gray-color);
    font-size: 0.875rem;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background-color: white;
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.service-description {
    color: var(--gray-color);
    font-size: 0.875rem;
}

/* Portfolio Section */
.profile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.profile-item {
    position: relative;
    border-radius: 0.5rem;
    overflow: hidden;
    height: 300px;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.profile-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    padding: 2rem 1.5rem 1.5rem;
    color: white;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.profile-item:hover .profile-overlay {
    transform: translateY(0);
}

.profile-item:hover .profile-image {
    transform: scale(1.05);
}

.profile-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.profile-description {
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

/* FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    overflow: hidden;
}

.faq-question {
    padding: 1.25rem;
    background-color: white;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: #f9fafb;
}

.faq-question i {
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 1.25rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background-color: white;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 1.25rem 1.25rem;
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.contact-info h3,
.contact-form h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.contact-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    margin-right: 1rem;
    flex-shrink: 0;
}

.contact-detail h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--dark-color);
}

.contact-detail p,
.contact-detail a {
    color: var(--gray-color);
    font-size: 0.875rem;
}

.contact-detail a:hover {
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.375rem;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-column h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: white;
}

.footer-column p {
    color: #d1d5db;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-link a {
    color: #d1d5db;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

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

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9ca3af;
    font-size: 0.875rem;
}

/* Social Feeds */
.social-feeds {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.social-box {
    background-color: white;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

/* Charts */
.chart-container {
    position: relative;
    margin: auto;
    height: 300px;
    margin-bottom: 2rem;
}

/* Responsive Adjustments */
@media (max-width: 1024px) {
    .section {
        padding: 4rem 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
}

/* Fix for fixed header overlapping content on pages other than index.html */
body:not(.index-page) main,
body:not(.index-page) .bibliography-container,
body:not(.index-page) .content-container,
body:not(.index-page) .header-info {
    padding-top: 80px; /* Adjust based on header height */
    box-sizing: border-box;
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding: 2rem 0;
        transition: left 0.3s ease;
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        margin: 0.5rem 0;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        display: none;
        width: 100%;
        background-color: #f9fafb;
    }
    
    .nav-item.dropdown.mobile-active .dropdown-menu {
        display: block;
    }
    
    .dropdown-toggle {
        display: inline-block;
    }
    
    .hero {
        padding: 8rem 0 3rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
    }
    
    .footer-column {
        text-align: center;
    }
    
    .social-icons {
        justify-content: center;
    }
    
    .contact-detail {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .contact-icon {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* Mobile Dropdown Specific Styles */
@media (max-width: 768px) {
    .dropdown-toggle {
        display: inline-flex !important;
        align-items: center;
        justify-content: center;
        width: 24px;
        height: 24px;
        background: transparent;
        border: none;
        cursor: pointer;
    }
    
    .dropdown-menu {
        position: static;
        width: 100%;
        box-shadow: none;
        margin-top: 0.5rem;
        border-radius: 0;
        border-left: 2px solid var(--primary-color);
    }
    
    .nav-menu.active .dropdown-menu {
        display: none;
    }
    
    .nav-menu.active .dropdown-menu:not(.hidden) {
        display: block;
        animation: fadeIn 0.3s ease forwards;
    }
    
    /* Ensure dropdown stays visible when mobile menu is open */
    .nav-menu.active {
        overflow-y: auto;
    }
}

/* Animation for dropdown */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}