* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: sans-serif;
    background-color: #F4F6F5;
    padding: 20px;
}

h1 {
    width: 1435px;
    text-align: center;
    margin-bottom: 20px;
    font-size: 26px;
    letter-spacing: 1px;
    color: #2E3833;
}

#tavola-periodica {
    display: grid;
    grid-template-columns: repeat(18, 75px);
    grid-template-rows: repeat(10, 55px);
    gap: 5px;
}

#menu {
    display: flex;
    gap: 50px;
    border-radius: 10px;
    padding: 12px 16px;
    grid-column: 4 / span 8;
    grid-row: 1 / span 3;
}

#infoelemento h2 {
    font-size: 18px;
    margin-bottom: 8px;
    color: #02033B;
}

#infoelemento p {
    font-weight: bold;
    font-size: 13px;
    line-height: 1.5;
    color: #2E3833;
}

.element-image {
    height: 125px;
}

.bottone-elemento {
    font-size: 11px;
    font-family: sans-serif;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 5px;
    color: #ffffff;
    padding: 3px 2px;
    line-height: 1.4;
}

.bottone-elemento:hover {
    transform: scale(1.15);
}

.non-metallo          { background-color: #2e7d4f; }
.gas-nobile           { background-color: #5c3d8f; }
.metallo-blocco-d     { background-color: #1a5276; }
.metallo-blocco-p     { background-color: #117a65; }
.alcalino             { background-color: #922b21; }
.alcalino-terroso     { background-color: #784212; }
.semi-metallo         { background-color: #1a6b5e; }
.alogeno              { background-color: #1a5e20; }
.lantanide            { background-color: #6c3483; }
.attinide             { background-color: #7b241c; }