* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

button {
    padding: 10px 15px;
    cursor: pointer;
    border: none;
    border-radius: 6px;
    font-weight: bold;
}

main {
    padding: 40px;
}

body {
    transition: background-color 0.6s ease, color 0.6s ease;
}

/* Sections invisibles par défaut */
.section {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    pointer-events: none;
    /* empêche de cliquer sur les sections invisibles */
}

/* Section visible */
.section.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* ===== AFFICHAGE DES SECTIONS ===== */

/* Par défaut : DEV */
.dev {
    display: grid;
}

.youtube {
    display: none;
}

/* Mode Dev */
body.dev-mode .youtube {
    display: none;
}

body.dev-mode .dev {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 10px;
    padding: 40px 20px;
}

/* Mode YouTube */
body.youtube-mode .dev {
    display: none;
}

body.youtube-mode .youtube {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 10px;
    padding: 40px 20px;
}