/* Base styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: rgba(224, 247, 250, 0.3); /* Set a base color with 30% opacity */
    background: linear-gradient(135deg, rgba(119, 191, 201, 0.3), rgba(178, 235, 242, 0.3)); /* Retain gradient with reduced opacity */
    margin: 0;
    color: #fff; /* Set text color to white for dark mode */
}

/* Periodic Table Container */
table {
    border-collapse: collapse;
    margin-top: 20px;
    width: 60%; /* Further reduce width to 60% */
    max-width: 600px; /* Set a maximum width */
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2); /* Enhanced shadow */
    border-radius: 10px;
}

/* Table Cells */
th, td {
    border: 1px solid #33323200;
    padding: 1px; /* Further reduced padding for smaller cells */
    text-align: center;
    font-size: 0.6em; /* Further reduced font size for smaller text */
    font-weight: bold;
    background: #12121200; /* Updated background color */
    transition: background-color 0.3s ease;
}

td {
    cursor: pointer;
}

/* Element box styling */
.element {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2px; /* Further reduced padding for elements */
    cursor: pointer;
    border: 2px solid #ffffff20;
    border-radius: 8px;
    color: #4a4848;
    font-size: 1.2em;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    background-size: 200% 200%;
}

/* Element colors */
.metal { background-color: rgba(115, 247, 103, 0.7); } /* Updated color for metals */
.nonmetal { background-color: rgba(129, 250, 244, 0.7); } /* Updated color for nonmetals */
.metalloid { background-color: rgba(244, 252, 130, 0.7); } /* Updated color for metalloids */
.noble { background-color: rgba(255, 154, 241, 0.7); } /* Updated color for noble gases */
.lanthanide { background-color: rgba(200, 248, 145, 0.7); } /* Updated color for lanthanides */
.actinide { background-color: rgba(255, 138, 128, 0.7); } /* Updated color for actinides */


/* Controls styling */
.controls {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    gap: 15px;
}

/* Search bar styling */
#search-bar {
    padding: 12px 20px;
    margin-right: 10px;
    border: 1px solid #ddd;
    border-radius: 30px;
    font-size: 1em;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    background: linear-gradient(135deg, #d697fad7, #81d4fad3);
    color: #ffe1e1;
}

#search-bar:focus {
    outline: none;
    border-color: #3366cc;
    box-shadow: 0 0 8px rgba(51, 102, 204, 0.4);
}

/* Category filter styling */
#category-filter {
    padding: 12px 20px;
    border: 1px solid #ddd;
    border-radius: 30px;
    font-size: 1em;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    background: linear-gradient(135deg, #d697fad7, #81d4fad3); /* Gradient background for metals and nonmetals */
    color: #454444; /* Text color */
}

#category-filter:focus {
    outline: none;
    border-color: #3366cc;
    box-shadow: 0 0 8px rgba(51, 102, 204, 0.4);
}

/* Change the color of the dropdown arrow */
#category-filter option {
    background: #ffffff; /* White background for options */
    color: #333; /* Text color for options */
}

/* Add responsive design */
@media (max-width: 768px) {
    table {
        width: 100%;
        margin-top: 10px;
    }

    .controls {
        flex-direction: column;
    }

    #search-bar, #category-filter {
        width: 100%;
    }
}

/* Set a fixed height for table rows */
tr {
    height: 25px; /* Further reduced height */
}

/* Tooltip styling */
.tooltip {
    display: none; /* Hidden by default */
    position: absolute; /* Position it absolutely */
    background-color: rgba(255, 255, 255, 0.9); /* Light background */
    border: 1px solid #ccc; /* Border */
    border-radius: 5px; /* Rounded corners */
    padding: 10px; /* Padding */
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2); /* Shadow for depth */
    z-index: 10; /* Ensure it appears above other elements */
    white-space: pre-wrap; /* Preserve whitespace for formatting */
}

#background-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover; /* Ensures the video covers the entire background */
    z-index: -1; /* Places the video behind other content */
}