/* Base Styles - Dark Mode */
:root {
    --primary-color: #3498db;
    --secondary-color: #1a1a1a;
    --accent-color: #e74c3c;
    --light-color: #2d2d2d;
    --dark-color: #1a1a1a;
    --text-color: #e0e0e0;
    --text-light: #b0b0b0;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --border-color: #333;
    --transition: all 0.3s ease;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    --border-radius: 5px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

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

ul {
    list-style: none;
}

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

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    text-align: center;
    margin-top: 20px;
}

.btn:hover {
    background-color: var(--secondary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.section {
    padding: 100px 0;
    background-color: var(--bg-color);
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    position: relative;
    font-family: 'Poppins', sans-serif;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 4px;
    background-color: var(--primary-color);
}

.bg-light {
    background-color: var(--light-color) !important;
}

/* Header & Navigation */
header {
    height: 70vh;
    background: linear-gradient(rgba(44, 62, 80, 0.8), rgba(44, 62, 80, 0.8)), url('https://source.unsplash.com/random/1920x1080/?coding') no-repeat center center/cover;
    color: white;
    position: relative;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    font-family: 'Poppins', sans-serif;
    border: 2px solid white;
    padding: 5px 10px;
    border-radius: 5px;
}

.nav-links {
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: white;
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

.menu-btn {
    display: none;
    cursor: pointer;
}

.menu-btn__burger {
    width: 25px;
    height: 3px;
    background-color: var(--card-bg);
    position: relative;
    transition: var(--transition);
}

.menu-btn__burger::before,
.menu-btn__burger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 3px;
    background-color: var(--card-bg);
    transition: var(--transition);
}

.menu-btn__burger::before {
    transform: translateY(-8px);
}

.menu-btn__burger::after {
    transform: translateY(8px);
}

/* Hero Section */
.hero {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    height: calc(70vh - 80px);
    padding: 40px 0;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 10px;
    font-weight: 700;
    font-family: 'Poppins', sans-serif;
}

.subtitle {
    font-size: 1.5rem;
    margin-bottom: 15px;
    opacity: 0.9;
}

.social-links {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-5px);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    align-items: center;
}

.about-image img {
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.highlight-text {
    background-color: rgba(52, 152, 219, 0.2);
    border-left: 4px solid var(--primary-color);
    padding: 15px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    margin: 25px 0;
    color: var(--text-color);
}

.highlight-text strong {
    color: var(--primary-color);
}

/* Experience & Education Sections */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--primary-color);
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
    left: 0;
    margin-bottom: 30px;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item-content {
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    position: relative;
}

.timeline-header {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
}

.timeline-logo {
    width: 70px;
    height: 70px;
    min-width: 70px;
    margin-right: 20px;
    border-radius: var(--border-radius);
    overflow: hidden;
    background-color: var(--card-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
}

.timeline-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.timeline-info {
    flex: 1;
}

.timeline-item-content::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: var(--card-bg);
    border: 4px solid var(--primary-color);
    border-radius: 50%;
    top: 20px;
    z-index: 1;
}

.timeline-item:nth-child(odd) .timeline-item-content::after {
    right: -50px;
}

.timeline-item:nth-child(even) .timeline-item-content::after {
    left: -50px;
}

.date {
    display: inline-block;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.timeline-item-content h3 {
    margin-bottom: 5px;
    color: var(--text-color);
}

.timeline-item-content h4 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.timeline-item-content p {
    margin-bottom: 15px;
}

.timeline-item-content ul {
    padding-left: 20px;
}

.timeline-item-content ul li {
    margin-bottom: 5px;
    position: relative;
}

.timeline-item-content ul li::before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

/* Skills Section */
.skills-container {
    text-align: center;
}

.skills-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.skill-item {
    text-align: center;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.skill-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.7);
}

.skill-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.skill-item h4 {
    font-size: 1rem;
    color: var(--text-color);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.7);
}

.project-image {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-image .image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: var(--transition);
}

.project-image .image-overlay span {
    color: white;
    font-weight: 500;
    padding: 8px 16px;
    border: 2px solid white;
    border-radius: var(--border-radius);
}

.project-image:hover .image-overlay {
    opacity: 1;
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-content {
    padding: 20px;
}

.project-content h3 {
    margin-bottom: 10px;
    color: var(--text-color);
}

.project-content p {
    margin-bottom: 15px;
    color: var(--text-light);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

.project-tags span {
    background-color: var(--light-color);
    color: var(--text-light);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.project-links {
    display: flex;
    gap: 15px;
}

.project-links a {
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Publications Section */
.publications-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.publication-item {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.publication-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.7);
}

.publication-item h3 {
    color: var(--text-color);
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.publication-authors {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 5px;
}

.publication-venue {
    color: var(--text-light);
    font-style: italic;
    margin-bottom: 15px;
}

.publication-links {
    display: flex;
    gap: 20px;
}

.publication-links a {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
}

.publication-links a i {
    color: var(--primary-color);
}

/* Contact Section */
.contact-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    max-width: 600px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.7);
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(52, 152, 219, 0.2);
    border-radius: 50%;
}

.contact-item p {
    margin: 0;
}

.highlight-text {
    color: var(--accent-color);
    font-weight: 500;
}

/* Visitor Map Section */
.visitor-map-container {
    margin: 30px auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.all-visitors-link {
    text-align: center;
    margin-top: 10px;
}

.btn-visitor-dashboard {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.btn-visitor-dashboard:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-visitor-dashboard i {
    font-size: 1.1rem;
}

#clustrmaps-globe-container {
    width: 100%;
    max-width: 800px;
    margin: 30px auto;
    min-height: 400px;
    position: relative;
    background-color: transparent;
    text-align: center;
    display: block;
}

#clustrmaps-globe-container iframe,
#clustrmaps-globe-container canvas,
#clustrmaps-globe-container > div,
#clustrmaps-globe-container object,
#clustrmaps-globe-container embed {
    width: 100% !important;
    max-width: 800px !important;
    height: 400px !important;
    min-height: 400px !important;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: none;
    display: block !important;
    margin: 0 auto;
}

.globe-container {
    width: 100%;
    margin: 0 auto;
}

.map-caption {
    margin-top: 15px;
    color: var(--text-light);
    font-style: italic;
    font-size: 0.9rem;
    text-align: center;
}

#visitor-map {
    background-color: var(--light-color);
    padding: 40px 0;
}

#visitor-map .section-title {
    margin-bottom: 30px;
    text-align: center;
}

#visitor-map .section-title::after {
    display: none;
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 30px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Media Queries */
@media screen and (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        text-align: center;
        margin-bottom: 30px;
    }

    .about-image img {
        max-width: 300px;
        margin: 0 auto;
    }

    .contact-container {
        grid-template-columns: 1fr;
    }

    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
        left: 0;
    }

    .timeline-item:nth-child(even) {
        left: 0;
    }

    .timeline-item-content::after {
        left: -39px !important;
    }
}

@media screen and (max-width: 768px) {
    .section {
        padding: 70px 0;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -300px;
        width: 300px;
        height: 100vh;
        background-color: var(--secondary-color);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        z-index: 100;
        transition: var(--transition);
    }

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

    .nav-links li {
        margin: 15px 0;
    }

    .menu-btn {
        display: block;
        z-index: 101;
    }

    .menu-btn.open .menu-btn__burger {
        background: transparent;
    }

    .menu-btn.open .menu-btn__burger::before {
        transform: rotate(45deg);
    }

    .menu-btn.open .menu-btn__burger::after {
        transform: rotate(-45deg);
    }

    .hero-content h1 {
        font-size: 3rem;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
}

@media screen and (max-width: 576px) {
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}