/* General Styling */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    transition: background-color 0.5s ease, color 0.5s ease;
}
header {
    padding: 20px;
    text-align: center;
    background-color: #0073b1;
    color: white;
}
.mode-toggle {
    text-align: right;
    margin-right: 20px;
}
button#toggle-theme {
    padding: 10px 20px;
    border: none;
    background-color: white;
    color: #333;
    cursor: pointer;
    border-radius: 5px;
    font-size: 1rem;
}
button#toggle-theme:hover {
    background-color: #f4f4f4;
}

/* Default Light Theme */
body.light-mode {
    background-color: #ffffff;
    color: #333;
}
header.light-mode {
    background-color: #0073b1;
}
.skill, .cert-card, .pub-card {
    background-color: #f4f4f4;
}
.cert-card, .pub-card {
    color: #0073b1;
}

/* Dark Mode */
body.dark-mode {
    background-color: #1e1e1e;
    color: #f4f4f4;
}
header.dark-mode {
    background-color: #333;
}
.skill, .cert-card, .pub-card {
    background-color: #333;
}
.cert-card, .pub-card {
    color: #1e90ff;
}
button#toggle-theme.dark-mode {
    background-color: #0073b1;
    color: white;
}

/* Section Styling */
section {
    padding: 50px;
    text-align: center;
}

/* Skills, Certifications, and Publications Section */
.skills-container, .cert-container, .pub-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}
.skill, .cert-card, .pub-card {
    background-color: #0073b1;
    color: white;
    width: 45%;
    margin: 20px;
    padding: 20px;
    border-radius: 10px;
    transition: transform 0.6s ease-in-out;
}
.skill:hover, .cert-card:hover, .pub-card:hover {
    transform: rotateY(180deg);
}