@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root {
    --primary-color: #00c6ff;
    --secondary-color: #e01e5a;
    --background-color: #1a1a1a;
    --text-color: #e0e0e0;
    --card-bg: #2c2c2c;
}

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

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

.container {
    max-width: 1200px; /* Restore max-width for content inside the container */
    margin: 0 auto;
    padding: 0 20px; /* Add horizontal padding to the container */
}

.navbar {
    display: flex;
    justify-content: center; /* Center the container */
    align-items: center;
    padding: 0; /* Remove padding from navbar itself */
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background-color: var(--navbar-bg-color, rgba(26, 26, 26, 0.8)); /* Use a variable for background */
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%; /* Ensure container takes full width of navbar */
    max-width: 1200px; /* Keep content constrained */
    padding: 20px; /* Apply padding here for content */
}

.hamburger-menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger-menu .bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 4px 0;
    transition: 0.4s;
}

/* Theme Toggle Icon Styles */
.theme-toggle-icon {
    margin-left: auto; /* Pushes the icon to the right */
    margin-right: 20px; /* Space from hamburger menu */
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.theme-toggle-icon:hover {
    color: var(--primary-color);
}

/* Dark mode variables */
body.dark-mode {
    --background-color: #1a1a1a;
    --text-color: #e0e0e0;
    --card-bg: #2c2c2c;
    --navbar-bg-color: rgba(26, 26, 26, 0.8);
    --navbar-scrolled-bg-color: rgba(26, 26, 26, 0.95);
}

/* Light mode variables */
body.light-mode {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f0f4f8;
    --text-color: #333;
    --card-bg: #ffffff;
    --navbar-bg-color: rgba(240, 244, 248, 0.8);
    --navbar-scrolled-bg-color: rgba(255, 255, 255, 0.9);
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color); /* Use text-color variable */
}

.nav-links {
    display: flex;
    list-style: none;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    text-align: left;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 50px;
    text-align: center;
}

@media (min-width: 768px) {
    .hero-content {
        flex-direction: row;
        text-align: left;
    }
}

.hero-text h1 {
    font-size: 3rem;
    margin-bottom: 10px;
}

@media (min-width: 768px) {
    .hero-text h1 {
        font-size: 4rem;
    }
}

.gradient-text {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

@media (min-width: 768px) {
    .hero-text h2 {
        font-size: 2rem;
    }
}

.hero-text p {
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.hero-image img {
    border-radius: 50%;
    width: 300px; /* Adjust as needed */
    height: 300px; /* Adjust as needed */
    object-fit: cover;
    border: 5px solid var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 198, 255, 0.5);
}

@media (min-width: 768px) {
    .hero-buttons {
        flex-direction: row;
    }
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.gradient-btn {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: #fff;
}

.gradient-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 198, 255, 0.3);
}

.btn:not(.gradient-btn) {
    background-color: var(--card-bg);
    color: var(--text-color);
}

.btn:not(.gradient-btn):hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

section {
    padding: 80px 0;
}

h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--text-color);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: var(--primary-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-item .content {
    padding: 20px 30px;
    background-color: var(--card-bg);
    position: relative;
    border-radius: 6px;
    cursor: pointer; /* Add cursor pointer to indicate clickability */
}

.dropdown-content {
    display: none; /* Hidden by default */
    padding-top: 10px;
    color: var(--text-color);
    background-color: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    margin-top: 10px;
    padding: 20px;
}

.dropdown-content ul {
    list-style: disc;
    padding-left: 20px;
}

.dropdown-content li {
    margin-bottom: 5px;
}

.timeline-item:nth-child(odd) {
    left: 0;
    padding-right: 25px;
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 25px;
}

@media (max-width: 768px) {
    .timeline::after {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 50px;
        padding-right: 10px;
    }

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

    .timeline-item::after {
        left: 12px;
    }

    .timeline-item:nth-child(even)::after {
        left: 12px;
    }
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    right: -8px;
    background-color: var(--background-color);
    border: 4px solid var(--primary-color);
    top: 22px;
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:nth-child(even)::after {
    left: -8px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.skill-card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-5px);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 30px;
    transition: transform 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
}

.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.publication-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 30px;
    transition: transform 0.3s ease;
    cursor: pointer;
}

.publication-card:hover {
    transform: translateY(-5px);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.education-card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid var(--card-bg);
    border-radius: 5px;
    background-color: var(--card-bg);
    color: var(--text-color);
}

footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 50px;
    background-color: var(--card-bg);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: rgba(26, 26, 26, 0.95);
        position: absolute;
        top: 60px;
        left: 0;
        padding: 20px 0;
        text-align: center;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 10px 0;
    }

    .hamburger-menu {
        display: flex;
    }
}