/* Base Styles */
:root {
    --primary-color: #0078d4;
    --secondary-color: #333333;
    --tertiary-color: #555555;
    --dark-bg: #ffffff;
    --card-bg: rgba(245, 245, 245, 0.9);
    --text-color: #003366;
    --text-secondary: #004080;
    --nav-height: 70px;
    --transition-speed: 0.3s;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: 'Roboto', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: #ffffff;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    line-height: 1.3;
}

h1 {
    font-size: 2.5rem;
    color: var(--text-color);
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
    color: var(--primary-color);
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
    margin-top: 0.5rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 600;
}

h3 {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-top: 1.5rem;
}

p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--secondary-color);
}

ul {
    list-style-position: inside;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Navigation */
.navbar {
    background-color: #ffffff;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid #eeeeee;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    max-height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
}

.nav-menu li {
    margin: 0 0 0 1.5rem;
}

.nav-menu a {
    color: #0078d4;
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: #0078d4;
    transition: width var(--transition-speed);
}

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

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    padding: 10px;
    z-index: 1001;
}

/* Hero Section */
.hero-section {
    height: 30vh;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: #f8f8f8;
    background-image: none;
    margin-top: var(--nav-height);
    padding: 1rem 0;
    border-bottom: 1px solid #eeeeee;
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 0.8; }
    50% { opacity: 1; }
    100% { opacity: 0.8; }
}

/* Section Styles */
.section {
    padding: 2rem 0;
}</invoke>

.service-card, .project-card, .publication-card, .background-card, .contact-card {
    background-color: #f9f9f9;
    border-radius: 4px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: none;
    border-left: 2px solid #333333;
}

.service-card:hover, .project-card:hover, .publication-card:hover, .background-card:hover, .contact-card:hover {
    /* Removed hover effect as requested */
}

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

/* Footer */
footer {
    background-color: rgba(30, 40, 60, 0.8);
    padding: 2rem 0;
    text-align: center;
    margin-top: 2rem;
}

/* Responsive Design */
@media (max-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        right: -100%;
        flex-direction: column;
        background-color: #ffffff;
        width: 80%;
        max-width: 300px;
        height: calc(100vh - var(--nav-height));
        padding: 2rem;
        transition: right var(--transition-speed);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
        z-index: 1000;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu li {
        margin: 1.5rem 0;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .hero-section {
        height: 30vh;
    }

    .hero-section h1 {
        font-size: 1.8rem;
    }

    .section {
        padding: 3rem 0;
    }

    .service-card, .project-card, .publication-card, .background-card, .contact-card {
        padding: 1.5rem;
    }
}