/* Base styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #f9f9f9;
    color: #333;
}

.header {
    background-color: #f3e8de;
    padding: 20px;
    text-align: center;
    border-bottom: 2px solid #ddd;
}

.header h1 {
    margin: 0;
    font-size: 2em;
    color: #333;
}

.header-icons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 10px;
}

.header-icons img {
    width: 32px;
    height: 32px;
    transition: transform 0.2s;
}

.header-icons img:hover {
    transform: scale(1.1);
}

/* Ad space styling */
.ad-space {
    text-align: center;
    font-size: 1em;
    margin: 10px 0;
    color: #666;
}

/* Semester header */
.semester-header {
    text-align: center;
    background-color: #f7c5a0;
    color: #333;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 10px;
    font-weight: bold;
}

/* Notes table */
.notes-table {
    width: 90%;
    margin: 0 auto 30px auto;
    border-collapse: collapse;
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.notes-table th, .notes-table td {
    padding: 12px;
    text-align: center;
    border-bottom: 1px solid #ddd;
}

.notes-table th {
    background-color: #333;
    color: #fff;
}

.notes-table td a {
    color: #8B4513; /* Dark brown color */
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

.notes-table td a:hover {
    color: #5A3220; /* Darker shade of brown */
}

.notes-table tr:hover {
    background-color: #f1f1f1;
}

.download-icon {
    width: 24px;
    height: 24px;
    fill: #007bff;
    transition: transform 0.2s, fill 0.2s; /* Added transform property */
}

.download-icon:hover {
    fill: #0056b3;
    transform: scale(1.1); /* Slight zoom animation */
}

/* Popup styling */
.popup {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: linear-gradient(135deg, #00b09b, #96c93d);
    color: #fff;
    padding: 15px 20px;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 16px;
}

.popup.show {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive styling */
@media (max-width: 768px) {
    .notes-table th, .notes-table td {
        font-size: 14px;
        padding: 10px;
    }

    .header-icons img {
        width: 28px;
        height: 28px;
    }
}