body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f9f9f9;
    margin: 0
}

h1,h2 {
    margin: 20px;
    color: brown
}

.main-table {
    display: grid;
    grid-template-columns: repeat(18, 50px);
    gap: 5px;
    justify-content: center;
    margin: 20px auto;
    inline-size: fit-content
}

.actinide-series,
.lanthanide-series {
    display: grid;
    grid-template-columns: repeat(15, 50px);
    gap: 5px;
    justify-content: center;
    margin: 10px auto;
    inline-size: fit-content
}

.element {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #000;
    border: 1px solid #ff0;
    border-radius: 5px;
    padding: 5px;
    font-size: 12px;
    color: #f5f5f5;
    inline-size: 50px;
    block-size: 50px;
    position: relative
}

.element:hover {
    background-color: #9acd32;
    cursor: pointer;
    font-size: 25 px;
    font-weight: 300;
    transform: scale(1.5); 
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
}

.element .symbol {
    font-weight: 700;
    font-size: 14px;
}

.element .number {
    position: absolute;
    inset-block-start: 2px;
    inset-inline-start: 5px;
    font-size: 10px;
}

.element .name {
    font-size: 10px;
    font-style: italic;
}