body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #777;
}


/* Particles Container */
#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: #333;
    /* Dark background for particles */
    z-index: -1;
    /* Place it behind the content */
}

.container {
    position: relative;
    /* Ensure content is above particles */
    z-index: 1;
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: #f0f0f0e6;
    /* Slightly transparent background */
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
}

.years {
    margin-top: 20px;
}

.year {
    margin-bottom: 20px;
}

h2 {
    color: #555;
}

.semesters {
    margin-left: 20px;
}

.semester {
    margin-bottom: 10px;
    color: #777;
}


.toggle-heading {
    cursor: pointer;
    user-select: none;
}

a {
    text-decoration: none;
}

/* Modal Styles */
.modal {
    display: none;
    /* Hidden by default */
    position: fixed;
    /* Stay in place */
    z-index: 1;
    /* Sit on top */
    left: 0;
    top: 0;
    width: 100%;
    /* Full width */
    height: 100%;
    /* Full height */
    overflow: auto;
    /* Enable scroll if needed */
    background-color: rgba(0, 0, 0, 0.5);
    /* Black background with opacity */
}

/* Modal Content */
.modal-content {
    background-color: #fefefe;
    margin: 10% auto;
    /* 10% from the top and centered */
    padding: 20px;
    border: 1px solid #888;
    width: 60%;
    /* Adjust width as needed */
    max-width: 600px;
    /* Maximum width */
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

/* Close Button */
.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}