* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 30px 15px;
    background: #e9e5dc;
    color: #4b473f;
    font-family: Georgia, "Times New Roman", serif;
}

.page-timbres {
    width: 960px;
    max-width: 100%;
    margin: 0 auto;
    background: #faf8f2;
    border: 1px solid #c9c1b2;
    box-shadow: 0 4px 18px rgba(65, 57, 44, 0.14);
}

.entete-timbres {
    padding: 28px 35px 24px;
    text-align: center;
    border-bottom: 1px solid #d5cec1;
}

.entete-timbres h1 {
    margin: 0 0 12px;
    color: #596a4e;
    font-size: 30px;
}

.entete-timbres p {
    margin: 0;
    color: #706a60;
    font-size: 19px;
    line-height: 1.6;
}

.grille-categories {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    padding: 30px;
}

.categorie-timbre {
    display: flex;
    align-items: center;
    gap: 13px;
    min-height: 78px;
    padding: 10px 13px;
    background: #fffdf8;
    border: 1px solid #c7d3bc;
    border-radius: 7px;
    color: #4d5d45;
    text-decoration: none;
    box-shadow: 0 2px 6px rgba(70, 60, 45, 0.07);
    transition: background 0.2s ease, border-color 0.2s ease;
}

.categorie-timbre:hover,
.categorie-timbre:focus {
    background: #edf3e7;
    border-color: #8ea97b;
}

.categorie-timbre img {
    width: 55px;
    height: 55px;
    flex: 0 0 55px;
    object-fit: contain;
}

.categorie-timbre span {
    font-size: 17px;
    font-weight: bold;
    line-height: 1.3;
}

.retour-preparation {
    padding: 5px 30px 30px;
    text-align: center;
}

.retour-preparation a {
    color: #596a4e;
    font-size: 18px;
    font-weight: bold;
    text-decoration: underline;
}

.pied-timbres {
    padding: 18px;
    background: #667259;
    color: #ffffff;
    text-align: center;
}

.pied-timbres p {
    margin: 4px 0;
}

.pied-timbres p:first-child {
    font-size: 18px;
    font-style: italic;
}

@media (max-width: 800px) {

    .grille-categories {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 24px;
    }

}

@media (max-width: 520px) {

    body {
        padding: 0;
    }

    .page-timbres {
        border: 0;
    }

    .entete-timbres {
        padding: 24px 18px 20px;
    }

    .entete-timbres h1 {
        font-size: 27px;
    }

    .grille-categories {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 20px 16px 26px;
    }

    .categorie-timbre {
        min-height: 72px;
    }

    .categorie-timbre span {
        font-size: 18px;
    }

}