/* General Body and Layout */
body {
    font-family: 'Roboto', sans-serif;
    background-color: #f9f9f9;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Particle.js Backgrounds */
#particles-js, #particles-education, #particles-research, #particles-publications, #particles-skills {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1; /* Particle.js behind the content */
}

/* Header Section */
header {
    background: linear-gradient(45deg, #5D6D7E, #2C3E50); /* Muted gray-blue gradient */
    color: #FDFEFE; /* Soft white for text */
    padding: 5em 1em;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    border-bottom: 5px solid #AAB7B8; /* Muted silver */
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    width: 100%;
}

/* Profile Image Styling */
.profile-img {
    width: 350px;
    height: 350px;
    border-radius: 50%;
    border: 4px solid #D5D8DC; /* Light gray */
    object-fit: cover;
    margin-bottom: 20px;
}

/* Header Text Styling */
.header-text {
    max-width: 800px;
    padding: 2em;
    background-color: rgba(44, 62, 80, 0.6); /* Semi-transparent dark gray-blue */
    border-radius: 10px;
    color: #FDFEFE; /* Soft white */
}

header h1 {
    font-size: 3em;
    margin: 0;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    letter-spacing: 2px;
    color: #EAECEE; /* Very light gray */
}

header p {
    font-size: 1.5em;
    margin: 1em 0;
    font-weight: 400;
    color: #D5D8DC; /* Muted silver-gray */
}

/* Social Links Styling */
.social-links {
    margin: 1em 0;
}

.social-links a {
    margin-right: 15px;
    display: inline-block;
}

.icon {
    width: 35px;
    height: 35px;
    vertical-align: middle;
    transition: transform 0.3s ease;
    filter: grayscale(50%); /* Muted icons */
    opacity: 0.8; /* Slightly faded look */
}

.icon:hover {
    transform: scale(1.2);
    filter: grayscale(0%); /* Full color on hover */
    opacity: 1;
}

/* Navigation Buttons Section Inside Header */
#navigation-buttons {
    margin-top: 2em; /* Space between text and buttons */
}

.button-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.nav-button {
    background-color: #5DADE2; /* Muted sky blue */
    color: #FDFEFE; /* White text */
    padding: 1em 2em;
    margin: 0.5em;
    font-size: 1.2em;
    text-decoration: none;
    border-radius: 5px;
    border: none; /* Remove border */
    cursor: pointer; /* Show pointer cursor */
    display: inline-block; /* Ensure buttons stay inline */
    transition: background-color 0.3s ease, transform 0.3s ease;
    font-weight: bold;
}

.nav-button:hover {
    background-color: #5499C7; /* Slightly darker blue on hover */
    transform: scale(1.1); /* Slight zoom effect on hover */
}

.nav-button:active {
    background-color: #2E86C1; /* Even darker blue when clicked */
}

/* Education Section */
#education {
    position: relative;
    padding: 4em 1em;
    text-align: center;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(45deg, #5D6D7E, #2C3E50); /* Muted gray-blue gradient */
    color: #FDFEFE; /* Soft white */
    z-index: 1;
}

#particles-education {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1; /* Particle.js behind the content */
}

/* Education Content */
.education-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 2em;
    background-color: rgba(44, 62, 80, 0.6); /* Semi-transparent dark gray-blue */
    border-radius: 10px;
    color: #FDFEFE; /* Soft white */
}

/* Education Section Heading */
#education h2 {
    font-size: 2.5em;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 1em;
    color: #EAECEE; /* Very light gray for heading */
}

/* Education List Styling */
#education ul {
    list-style: none;
    padding-left: 0;
}

#education ul li {
    font-size: 1.2em;
    line-height: 1.6;
    margin-bottom: 1em;
    color: #D5D8DC; /* Muted silver-gray for list items */
}

#education ul li strong {
    color: #A9CCE3; /* Muted blue accent for emphasis */
}

#education ul li a {
    color: #A9CCE3; /* Muted blue for links */
    text-decoration: none;
}

#education ul li a:hover {
    text-decoration: underline;
}


/* Research Interest Section */
/* Research Interest Section */
#research-interest {
    position: relative;
    padding: 4em 1em;
    text-align: center;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(45deg, #5D6D7E, #2C3E50); /* Muted gray-blue gradient for formality */
    color: #FDFEFE; /* Soft white */
    z-index: 1;
}

#particles-research {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1; /* Particle.js behind the content */
}

/* Research Interests Content */
.research-interest-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 2em;
    background-color: rgba(44, 62, 80, 0.6); /* Semi-transparent dark gray-blue */
    border-radius: 10px;
    color: #EAECEE; /* Soft grayish white for text */
}

/* Research Interest Section Heading */
#research-interest h2 {
    font-size: 2.5em;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 1em;
    color: #FDFEFE; /* Soft white for heading */
}

/* Research Interest Paragraph Styling */
#research-interest p {
    font-size: 1.2em;
    color: #D5D8DC; /* Muted silver-gray for paragraph text */
}

#research-interest strong {
    font-weight: 700; /* Bold the specific fields and techniques */
    color: #A9CCE3; /* Subtle blue for emphasis */
}

/* General Styles for Sections */
section {
    position: relative;
    padding: 4em 1em;
    text-align: center;
    font-family: 'Roboto', sans-serif;
    z-index: 1;
    color: #FDFEFE; /* Soft white for text */
}

/* Background Colors and Gradients */
#publications,
#professional-experience,
#selected-projects,
#awards-honour,
#skills {
    background: linear-gradient(45deg, #5D6D7E, #2C3E50); /* Muted gray-blue gradient */
}

/* Particle Effects */
#particles-publications,
#particles-professional,
#particles-projects,
#particles-awards,
#particles-skills {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1; /* Particle.js behind the content */
}

/* Section Content */
section .content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 2em;
    background-color: rgba(44, 62, 80, 0.6); /* Semi-transparent dark gray-blue */
    border-radius: 10px;
    color: #EAECEE; /* Soft grayish white for content text */
}

/* Section Headings */
section h2 {
    font-size: 2.5em;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 1em;
    color: #FDFEFE; /* Soft white for headings */
}

/* Common Styles for Lists */
section ul {
    list-style: none;
    padding-left: 0;
}

section ul li {
    font-size: 1.2em;
    line-height: 1.6;
    margin-bottom: 1em;
    color: #D5D8DC; /* Muted silver-gray for list items */
}

section ul li strong {
    color: #A9CCE3; /* Subtle muted blue for emphasis */
}

section ul li i {
    color: #95A5A6; /* Light gray for secondary text */
}

section ul li a {
    color: #A9CCE3; /* Subtle blue for links */
    text-decoration: none;
}

section ul li a:hover {
    text-decoration: underline;
}

/* Publications Specific */
#publications .publication-category {
    margin-bottom: 2em;
    padding: 1.5em;
    border-radius: 10px;
    background-color: rgba(44, 62, 80, 0.7); /* Slightly darker background */
}

#publications .publication-category h3 {
    font-size: 2em;
    font-weight: 700;
    color: #A9CCE3; /* Muted blue for category titles */
    margin-bottom: 1em;
}

/* Footer Section */
footer {
    background-color: #2C3E50; /* Dark muted blue */
    color: #FDFEFE; /* Soft white */
    text-align: center;
    padding: 1.5em;
    margin-top: 3em;
}

footer p {
    margin: 0;
    font-size: 1.1em;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }

    section {
        padding: 1.5em;
        margin: 1em;
    }

    section h2 {
        font-size: 1.8em;
    }

    section p, ul li {
        font-size: 1em;
    }

    footer {
        padding: 1em;
    }
}