:root {
    --chiarissimo: #DFEDF2;
    --chiaro: #BFD1D9;
    --medio: #A3B4BF;
    --scuro: #718891;
    --scurissimo: #2d3a3e;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: var(--chiarissimo);
    color: var(--scurissimo);
    margin: 0;
    padding: 50px 20px;
    text-align: center;
}
 
#bghub {
    position: fixed;
    top: 0;
    left: 0;
    min-width: 100%;
    min-height: 100%;
    z-index: -1;
    object-fit: cover;
    opacity: 0.9;
}

.hub_container {
    max-width: 900px;
    margin: 0 auto;
}

.hub_container h1 {
    color: var(--scurissimo); 
    font-size: 2.8em;
    margin-bottom: 50px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.hub_container h2 {
    color: var(--scuro);
    font-size: large;
    margin-top: -45px;
    margin-bottom: 50px;
    letter-spacing: 2px;
}

.scelta_percorso {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.card_hub {
    background-color: #2d3a3eee;
    border-top: 8px solid #a3b4bf98; 
    border-radius: 15px;
    padding: 40px 30px;
    width: 320px;
    box-shadow: 0 10px 20px #2a3235a6;
    transition: transform 0.3s ease;
}

.card_hub:hover {
    transform: translateY(-10px);
}

.card_hub h3 {
    color: var(--chiarissimo);
    font-size: 1.8em;
    margin-top: 0;
    margin-bottom: 15px;
}

.card_hub p {
    color: var(--chiarissimo);
    font-size: 1.1em;
    margin-bottom: 35px;
    line-height: 1.5;
}

.bottone_hub {
    display: inline-block;
    background-color: var(--chiaro);
    color: var(--scurissimo); 
    text-decoration: none;
    font-weight: bold;
    padding: 12px 30px;
    border-radius: 30px;
    font-size: 1.1em;
    transition: background-color 0.3s, color 0.3s;
}

.bottone_hub:hover {
    background-color: var(--chiarissimo);
    color: var(--scurissimo);
}