/* Réinitialisation simple */
* {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    min-height: 100%;
    margin: 0;
}

body {
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: #ffffff;
    color: #111111;
    font-family: Arial, Helvetica, sans-serif;
}

/* Bloc principal centré sur ordinateur, tablette et smartphone */
.page-construction {
    width: min(100%, 1200px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: clamp(18px, 4vw, 40px);
    text-align: center;
}

/* Remplacez image-activite.jpg par votre propre image */
.image-activite {
    display: block;
    width: auto;
    max-width: 100%;
    max-height: 70vh;
    max-height: 70svh;
    object-fit: contain;
}

h1 {
    margin: 0;
    font-size: clamp(1rem, 3vw, 2.5rem);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: 0.04em;
}

/* Adaptation aux petits écrans */
@media (max-width: 600px) {
    body {
        padding: 16px;
    }

    .image-activite {
        max-height: 62vh;
        max-height: 62svh;
    }
}