body {
    font-family: Arial, sans-serif;
    background: #1a1a2e; /* dark electric blue */
    margin: 30px;
    color: #e0e0e0; /* light gray for contrast */
}
h1 {
    color: #00e6ff; /* electric cyan */
    text-align: center;
    text-shadow: 0 0 8px #00e6ff;
}
table {
    border-collapse: collapse;
    width: 60%;
    margin: 20px auto;
    background: #23234b; /* deep blue */
    box-shadow: 0 2px 12px #00e6ff88;
}
th, td {
    border: 1px solid #ffd600; /* electric yellow */
    padding: 10px 16px;
    text-align: center;
    color: #e0e0e0;
}
th {
    background: #00e6ff22; /* faint cyan */
}
ul, ol {
    margin: 20px 40px;
    color: #ffd600; /* electric yellow */
}
mark {
    background-color: #ffd600;
    color: #23234b;
    padding: 0 4px;
    border-radius: 2px;
}
.formula {
    font-size: 1.1em;
    color: #ffd600;
    background: #23234b;
    padding: 6px 12px;
    border-radius: 5px;
    display: inline-block;
    margin: 10px 0;
    box-shadow: 0 0 6px #ffd60088;
}
em {
    color: #00e6ff;
}
footer {
    text-align: center;
    margin-top: 40px;
    color: #888;
}