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

body {
    font-family: 'Roboto', sans-serif;
    color: #333;
    line-height: 1.6;
}

header {
    height: 100vh;
    background: linear-gradient(135deg, #2c3e50, #2980b9);
    color: white;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

nav {
    position: absolute;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 20px;
    background-color: rgba(0, 0, 0, 0.5);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 500;
}

nav .logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.header-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.header-content p {
    font-size: 1.5rem;
}

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

section {
    padding: 60px 20px;
    text-align: center;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

p {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

/* Skills List Styles */
.skills-list, .projects-list {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

/* Card Styles */
.skill-card, .project-card {
    background: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin: 20px;
    flex: 1;
    min-width: 250px;
    transition: transform 0.2s;
}

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

.skill-card h3, .project-card h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

/* Contact Button Styles */
.contact-links {
    margin-top: 20px;
}

.contact-links .contact-btn {
    width: 50px;
    height: 50px;
    display: inline-block;
    background-color: #2980b9;
    color: white;
    font-size: 24px;
    border-radius: 50%;
    line-height: 50px;
    text-align: center;
    margin: 0 10px;
    text-decoration: none;
    transition: background 0.3s ease;
}

.contact-links .contact-btn:hover {
    background-color: #1c5980;
}

.contact-links i {
    pointer-events: none; /* Prevents clicking on the icon itself */
}

/* Back to Top Button */
#back-to-top {
    display: none; /* Hidden by default */
    position: fixed;
    bottom: 40px;
    right: 30px;
    background-color: #2980b9;
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%; /* Circular button */
    font-size: 24px; /* Adjusted font size */
    line-height: 50px; /* Center the Unicode character */
    cursor: pointer;
}

#back-to-top:hover {
    background-color: #1c5980;
}

/* Footer Styles */
footer {
    text-align: center;
    padding: 20px;
    background-color: #2980b9;
    color: white;
}

footer p {
    margin: 0;
}

/* Dark Mode */
body.dark-mode {
    background-color: #121212;
    color: white;
}

header.dark-mode {
    background: linear-gradient(135deg, #1b262c, #0f4c75);
}

nav.dark-mode {
    background-color: rgba(0, 0, 0, 0.7);
}

.contact-links a.dark-mode {
    background-color: #0f4c75;
}

.dark-mode i {
    color: white; /* Icon color in dark mode */
}