body {
    background: url('../Images/Veille/raspberry-pi-os-logo-with-board-background-3.avif') no-repeat center center fixed;
    background-size: cover;
}

main {
    position: relative;
    max-width: 1200px;
    margin: 20px auto;
    padding: 30px;
    background-color: rgb(255, 255, 255, 0.9);
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-top: 10rem;
}

main::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    z-index: -1;
}

h1 {
    margin-bottom: 20px;
    color: black;
}

h2 {
    font-size: 1.8em;
    margin-top: 5rem;
    color: black;
}

hr {
    display: inline-flex;
    border: none;
    height: 2px;
    background: linear-gradient(to right, #ff0000, #000);
    margin: 20px 0;
    width: 30%;
    max-width: 50%;
    box-sizing: border-box;
}

.sources {
    color: black;
}

.sources:hover {
    text-decoration: underline;
}

ul {
    list-style-type: none;
    text-align: center;
}

ul li {
    margin-bottom: 10px;
    font-size: 1.2rem;
    color: black;
}

/* Images */
img {
    max-width: 30%;
    height: auto;
    margin: 5rem 0 0 0;
}

#evolution {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 20px 0;
}

.texte-photo {
    font-size: 1rem;
}

/* Tableau comparatif Avantages/Inconvénients */
.comparatif {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.comparatif th,
.comparatif td {
    border: 1px solid black;
    padding: 10px;
    color: black;
}

.comparatif th {
    background-color: rgb(150, 0, 0);
    font-weight: bold;
    color: white;
}

.comparatif tr {
    background-color: #e6e6e6;
}

/* Innovations */
.innovations ul {
    list-style-type: none;
    padding-left: 0;
}

.innovations li {
    margin-bottom: 20px;
    background-color: white;
    border-left: 5px solid #c0392b;
    padding: 10px 15px;
    border-radius: 8px;
    transition: background-color 0.3s;
    width: 90%;
    display: inline-block;
}

.innovations li:hover {
    background-color: #f1f1f1;
}

.innovations strong {
    font-size: 1.1em;
    color: #2c3e50;
}

/* Timeline évolution des modèles */
.timeline {
    list-style: none;
    padding: 0;
    margin: 0;
}

.timeline li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid #ddd;
}

.timeline li strong {
    font-weight: bold;
}

.timeline-group {
    margin-top: 20px;
    font-size: 1.2em;
    font-weight: bold;
    color: #d32f2f;
}

/* RESPONSIVE DESIGN */
@media screen and (max-width: 1024px) {
    main {
        margin: 10rem 10px 20px 10px;
        padding: 20px;
    }

    h2 {
        margin-top: 3rem;
    }

    img {
        max-width: 50%;
    }
}

@media screen and (max-width: 768px) {
    main {
        margin: 8rem 10px 20px 10px;
        padding: 15px;
    }

    h2 {
        margin-top: 2rem;
    }

    ul li {
        font-size: 1rem;
    }

    img {
        max-width: 70%;
    }
}

@media screen and (max-width: 480px) {
    main {
        margin: 6rem 5px 10px 5px;
        padding: 10px;
    }

    h2 {
        margin-top: 2rem;
    }

    ul li {
        font-size: 0.85rem;
    }

    img {
        max-width: 90%;
    }

    .timeline li {
        flex-direction: column;
        align-items: flex-start;
        padding: 6px 0;
    }
}